- Aluminum, FIL, DCP -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01106, MCode: DCP02
Dates: 10/14/86 through 06/04/96
Open Data Set

 Mean = 126.90 
 % Relative Standard Deviation = 19.1 
 Number of Observations = 29 
 Blind Sample ID = ST97  Mean = 26.88 
 % Relative Standard Deviation = 26.2 
 Number of Observations = 16 
 Blind Sample ID = ST95  Mean = 36.15 
 % Relative Standard Deviation = 28.9 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 116.25 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 8 
 Blind Sample ID = 67DW-33113  Mean = 10.33 
 % Relative Standard Deviation = 17.7 
 Number of Observations = 30 
 Blind Sample ID = 50DW-50123  Mean = 45.31 
 % Relative Standard Deviation = 21.7 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50121  Mean = 38.57 
 % Relative Standard Deviation = 27.7 
 Number of Observations = 7 
 Blind Sample ID = 50DW-50117  Mean = 15.48 
 % Relative Standard Deviation = 40.3 
 Number of Observations = 31 
 Blind Sample ID = 50DW-50115  Mean = 30.00 
 % Relative Standard Deviation = 28.0 
 Number of Observations = 18 
 Blind Sample ID = 50DIW-50133  Mean = 66.36 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 11 
 Blind Sample ID = 5097/50DW  Mean = 16.00 
 % Relative Standard Deviation = 34.2 
 Number of Observations = 5 
 Blind Sample ID = 5095/50DW  Mean = 37.69 
 % Relative Standard Deviation = 15.9 
 Number of Observations = 13 
 Blind Sample ID = 5011/50DW  Mean = 111.07 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 28 
 Blind Sample ID = 5007/50DW  Mean = 66.67 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 24 
 Blind Sample ID = 5003/50DW  Mean = 58.00 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 84.71 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 34 
 Blind Sample ID = 33DW/6797  Mean = 109.78 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 12.50 
 % Relative Standard Deviation = 40.0 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6787  Mean = 50.00 
 % Relative Standard Deviation = 14.1 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  Mean = 150.36 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 28 
 Blind Sample ID = 33DW/6707  Mean = 89.74 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 38 
 Blind Sample ID = 33DW/6703  Mean = 59.33 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67121  Mean = 36.79 
 % Relative Standard Deviation = 30.6 
 Number of Observations = 28 
 Blind Sample ID = 33DW-67105  Mean = 87.67 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67103  Mean = 11.11 
 % Relative Standard Deviation = 30.0 
 Number of Observations = 9 
 Blind Sample ID = 33DIW-67135  Mean = 90.00 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 23 
 Blind Sample ID = 33DIW-67131  Mean = 56.25 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 40 
 Blind Sample ID = 33DIW-67127  Mean = 60.00 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7599  Mean = 99.62 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 26 
 Blind Sample ID = 25DW/7597  Mean = 22.11 
 % Relative Standard Deviation = 35.6 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  Mean = 169.00 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575  Mean = 59.33 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 15 
 Blind Sample ID = 25DW/7511  Mean = 162.00 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7507  Mean = 99.38 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 32 
 Blind Sample ID = 25DW/7503  Mean = 62.42 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 33 
 Blind Sample ID = 25DW-75121  Mean = 43.21 
 % Relative Standard Deviation = 25.2 
 Number of Observations = 28 
 Blind Sample ID = 25DW-75105  Mean = 100.94 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75103  Mean = 94.00 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 15 
 Blind Sample ID = 2599/7501  Mean = 86.67 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504  Mean = 102.00 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 88.70 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501
The SGPlot Procedure



- Aluminum, FIL, DCP, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01106, MCode: DCP01
Dates: 10/08/92 through 02/21/95
Open Data Set

 Mean = 21.13 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25117  Mean = 4.40 
 % Relative Standard Deviation = 25.9 
 Number of Observations = 5 
 Blind Sample ID = 75DIW-25125  Mean = 57.57 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 7 
 Blind Sample ID = 33DW-67121  Mean = 63.57 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 14 
 Blind Sample ID = 25DW-75121
The SGPlot Procedure



- Aluminum, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01106, MCode: PLM43
Dates: 02/07/94 through 09/27/01
Open Data Set

 Mean = 30.51 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 34 
 Blind Sample ID = GT3  Mean = 20.03 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25155  Mean = 7.25 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 8.03 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 32 
 Blind Sample ID = 75DIW-25137  Mean = 5.80 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 20 
 Blind Sample ID = 75DIW-25125  Mean = 34.22 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 11.33 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 6.18 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 29.05 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 31.82 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 16.69 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 28 
 Blind Sample ID = 50143-50151  Mean = 42.23 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 18.94 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 34.93 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 15.09 
 % Relative Standard Deviation = 30.8 
 Number of Observations = 32 
 Blind Sample ID = 50125-50123  Mean = 35.76 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 47.19 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 58.33 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 27.13 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 61.17 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 232.25 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Aluminum, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01106, MCode: PLA13
Dates: 06/07/96 through 09/27/01
Open Data Set

 Mean = 17.72 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 7 
 Blind Sample ID = 75DIW-25155  Mean = 6.53 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 3 
 Blind Sample ID = 75DIW-25151  Mean = 7.04 
 % Relative Standard Deviation = 23.8 
 Number of Observations = 22 
 Blind Sample ID = 75DIW-25139  Mean = 10.45 
 % Relative Standard Deviation = 23.3 
 Number of Observations = 3 
 Blind Sample ID = 75DIW-25137  Mean = 35.33 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 22 
 Blind Sample ID = 50DIW-50145  Mean = 27.48 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 6 
 Blind Sample ID = 50DIW-50133  Mean = 30.10 
 % Relative Standard Deviation = 18.0 
 Number of Observations = 20 
 Blind Sample ID = 50157-50DIW  Mean = 34.76 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 12 
 Blind Sample ID = 50155-50DIW  Mean = 11.74 
 % Relative Standard Deviation = 24.1 
 Number of Observations = 18 
 Blind Sample ID = 50147-50151  Mean = 55.76 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 16 
 Blind Sample ID = 50145-50147  Mean = 52.54 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 26 
 Blind Sample ID = 50139-50141  Mean = 28.53 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 4 
 Blind Sample ID = 50137-50143  Mean = 26.90 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 12 
 Blind Sample ID = 50137-50139  Mean = 18.78 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 23 
 Blind Sample ID = 50135-50139  Mean = 8.66 
 % Relative Standard Deviation = 28.1 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67135  Mean = 51.37 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 3 
 Blind Sample ID = 33DIW-67127  Mean = 26.26 
 % Relative Standard Deviation = 22.3 
 Number of Observations = 7 
 Blind Sample ID = 25DIW-75159  Mean = 9.48 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 3 
 Blind Sample ID = 25DIW-75151  Mean = 14.75 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75147  Mean = 39.85 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 20 
 Blind Sample ID = 25157-75159  Mean = 46.73 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 12 
 Blind Sample ID = 25155-75153  Mean = 62.10 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 34.45 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 4 
 Blind Sample ID = 25145-75143  Mean = 26.30 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137
The SGPlot Procedure



- Aluminum, UNF, DCP -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01105, MCode: DCP05
Dates: 10/14/86 through 02/16/99
Open Data Set

 Mean = 4487.50 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 4766.67 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 3 
 Blind Sample ID = STS1  Mean = 50.00 
 % Relative Standard Deviation = 72.1 
 Number of Observations = 3 
 Blind Sample ID = ST99  Mean = 161.82 
 % Relative Standard Deviation = 17.0 
 Number of Observations = 11 
 Blind Sample ID = ST93  Mean = 47.33 
 % Relative Standard Deviation = 27.0 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  Mean = 15.83 
 % Relative Standard Deviation = 62.9 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 40.00 
 % Relative Standard Deviation = 22.4 
 Number of Observations = 11 
 Blind Sample ID = 50DW-50117  Mean = 53.33 
 % Relative Standard Deviation = 21.0 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 41.33 
 % Relative Standard Deviation = 37.5 
 Number of Observations = 3 
 Blind Sample ID = 50DIW-50145  Mean = 42.50 
 % Relative Standard Deviation = 29.6 
 Number of Observations = 8 
 Blind Sample ID = 50143-50145  Mean = 54.50 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 57.75 
 % Relative Standard Deviation = 26.8 
 Number of Observations = 8 
 Blind Sample ID = 50139-50141  Mean = 26.00 
 % Relative Standard Deviation = 53.8 
 Number of Observations = 3 
 Blind Sample ID = 50137-50143  Mean = 52.25 
 % Relative Standard Deviation = 18.1 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 28.00 
 % Relative Standard Deviation = 45.8 
 Number of Observations = 4 
 Blind Sample ID = 50137-50139  Mean = 16.88 
 % Relative Standard Deviation = 32.7 
 Number of Observations = 8 
 Blind Sample ID = 50135-50139  Mean = 17.13 
 % Relative Standard Deviation = 27.5 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 40.00 
 % Relative Standard Deviation = 28.6 
 Number of Observations = 27 
 Blind Sample ID = 50125-50133  Mean = 14.31 
 % Relative Standard Deviation = 40.1 
 Number of Observations = 51 
 Blind Sample ID = 50125-50123  Mean = 83.75 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 8 
 Blind Sample ID = 50117-50121  Mean = 65.45 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 83.75 
 % Relative Standard Deviation = 15.6 
 Number of Observations = 8 
 Blind Sample ID = 5001/5011  Mean = 152.50 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 58.89 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 9 
 Blind Sample ID = 25DW/7511  Mean = 175.56 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 9 
 Blind Sample ID = 25DW/7507  Mean = 113.33 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7503  Mean = 239.58 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 24 
 Blind Sample ID = 25DW-75113  Mean = 42.31 
 % Relative Standard Deviation = 29.2 
 Number of Observations = 13 
 Blind Sample ID = 25DW-75105  Mean = 62.22 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 36 
 Blind Sample ID = 25DIW-75127  Mean = 59.00 
 % Relative Standard Deviation = 18.0 
 Number of Observations = 4 
 Blind Sample ID = 25147-75145  Mean = 45.00 
 % Relative Standard Deviation = 38.1 
 Number of Observations = 4 
 Blind Sample ID = 25145-75143  Mean = 37.50 
 % Relative Standard Deviation = 18.5 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 26.88 
 % Relative Standard Deviation = 33.5 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137  Mean = 13.83 
 % Relative Standard Deviation = 57.9 
 Number of Observations = 6 
 Blind Sample ID = 25137-75135
The SGPlot Procedure



- Aluminum, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01105, MCode: PLA15
Dates: 03/08/99 through 09/28/01
Open Data Set

 Mean = 21.80 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 4 
 Blind Sample ID = 75DIW-25155  Mean = 34.29 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50145  Mean = 33.16 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 30.14 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 21.13 
 % Relative Standard Deviation = 24.6 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75159  Mean = 16.66 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 3 
 Blind Sample ID = 25DIW-75147  Mean = 55.30 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 4 
 Blind Sample ID = 25159-75155  Mean = 38.20 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 60.79 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 4 
 Blind Sample ID = 25155-75157  Mean = 22.52 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 4 
 Blind Sample ID = 25155-75151  Mean = 36.89 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 4 
 Blind Sample ID = 25151-75153  Mean = 26.45 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 4 
 Blind Sample ID = 25151-75147  Mean = 58.53 
 % Relative Standard Deviation = 16.5 
 Number of Observations = 4 
 Blind Sample ID = 25147-75145
The SGPlot Procedure



- Antimony, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01095, MCode: GF032
Dates: 10/05/98 through 09/05/00
Open Data Set

 Mean = 18.25 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 4 
 Blind Sample ID = 50147-50151  Mean = 9.92 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 4 
 Blind Sample ID = 50145-50147  Mean = 24.38 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 4 
 Blind Sample ID = 25155-75151  Mean = 25.97 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 4 
 Blind Sample ID = 25151-75153  Mean = 13.63 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 4 
 Blind Sample ID = 25151-75147  Mean = 18.61 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 4 
 Blind Sample ID = 25151-75143
The SGPlot Procedure



- Antimony, FIL, Hydride, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01095, MCode: HY009
Dates: 01/29/87 through 09/29/98
Open Data Set

 Mean = 12.08 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 13 
 Blind Sample ID = ST97  Mean = 3.44 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 16 
 Blind Sample ID = 50DW-50125  Mean = 3.75 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 16 
 Blind Sample ID = 50DW-50117  Mean = 7.66 
 % Relative Standard Deviation = 17.4 
 Number of Observations = 7 
 Blind Sample ID = 50139-50141  Mean = 14.80 
 % Relative Standard Deviation = 36.0 
 Number of Observations = 4 
 Blind Sample ID = 50137-50143  Mean = 13.22 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 4 
 Blind Sample ID = 50137-50139  Mean = 41.96 
 % Relative Standard Deviation = 15.7 
 Number of Observations = 8 
 Blind Sample ID = 50135-50139  Mean = 12.64 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 14 
 Blind Sample ID = 50125-50133  Mean = 8.38 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 40 
 Blind Sample ID = 50125-50123  Mean = 9.77 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 13 
 Blind Sample ID = 50117-50121  Mean = 16.53 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 15 
 Blind Sample ID = 50107-50113  Mean = 12.13 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 16 
 Blind Sample ID = 50101-50107  Mean = 6.87 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 38 
 Blind Sample ID = 5003/5005  Mean = 7.86 
 % Relative Standard Deviation = 15.5 
 Number of Observations = 7 
 Blind Sample ID = 33DW/6797  Mean = 1.40 
 % Relative Standard Deviation = 39.1 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6793  Mean = 6.30 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 5.42 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6703  Mean = 6.42 
 % Relative Standard Deviation = 19.3 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 5.47 
 % Relative Standard Deviation = 24.6 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 16.03 
 % Relative Standard Deviation = 18.0 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75113  Mean = 3.50 
 % Relative Standard Deviation = 19.7 
 Number of Observations = 20 
 Blind Sample ID = 25DIW-75127  Mean = 8.25 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 14.84 
 % Relative Standard Deviation = 21.5 
 Number of Observations = 4 
 Blind Sample ID = 25145-75143  Mean = 55.06 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 7 
 Blind Sample ID = 25137-75135  Mean = 6.50 
 % Relative Standard Deviation = 28.1 
 Number of Observations = 16 
 Blind Sample ID = 25107-75105  Mean = 8.48 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501
The SGPlot Procedure



- Antimony, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01095, MCode: PLM43
Dates: 02/07/94 through 09/27/01
Open Data Set

 Mean = 4.28 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25155  Mean = 2.68 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 4.27 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 32 
 Blind Sample ID = 75DIW-25137  Mean = 1.88 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25125  Mean = 4.48 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 8.68 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 41.24 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 5.43 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 7.71 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 22.48 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 27 
 Blind Sample ID = 50143-50151  Mean = 13.64 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 50.06 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 10.73 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 6.88 
 % Relative Standard Deviation = 18.4 
 Number of Observations = 32 
 Blind Sample ID = 50125-50123  Mean = 12.66 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 25.21 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 20.15 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 10.17 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 5.57 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 14.94 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Antimony, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01097, MCode: GF031
Dates: 10/13/98 through 09/14/99
Open Data Set

 Mean = 4.07 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 4 
 Blind Sample ID = 50DIW-50145  Mean = 8.93 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145
The SGPlot Procedure



- Arsenic, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01000, MCode: GF085
Dates: 10/05/98 through 09/28/01
Open Data Set

 Mean = 8.22 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 24 
 Blind Sample ID = 75DIW-25155  Mean = 5.03 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 36 
 Blind Sample ID = 50DIW-50145  Mean = 13.20 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 32 
 Blind Sample ID = 50157-50DIW  Mean = 16.07 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 1.50 
 % Relative Standard Deviation = 25.7 
 Number of Observations = 4 
 Blind Sample ID = 50147-50151  Mean = 6.46 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 4 
 Blind Sample ID = 50145-50147  Mean = 8.05 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 28 
 Blind Sample ID = 50143-50151  Mean = 21.80 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 20 
 Blind Sample ID = 25DIW-75159  Mean = 1.74 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 14 
 Blind Sample ID = 25DIW-75147  Mean = 11.93 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75143  Mean = 33.08 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 11 
 Blind Sample ID = 25159-75155  Mean = 28.16 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 30 
 Blind Sample ID = 25157-75159  Mean = 27.48 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 12 
 Blind Sample ID = 25155-75157  Mean = 8.51 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 9.16 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 4 
 Blind Sample ID = 25155-75151  Mean = 10.08 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 8 
 Blind Sample ID = 25155-75147  Mean = 25.23 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 28 
 Blind Sample ID = 25151-75155  Mean = 2.03 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 4 
 Blind Sample ID = 25151-75147  Mean = 10.88 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 4 
 Blind Sample ID = 25151-75143  Mean = 7.90 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 4.12 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 34 
 Blind Sample ID = 25145-75147
The SGPlot Procedure



- Arsenic, FIL, Hydride, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01000, MCode: HY010
Dates: 10/14/86 through 09/29/98
Open Data Set

 Mean = 6.00 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 12.14 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 28 
 Blind Sample ID = ST97  Mean = 1.06 
 % Relative Standard Deviation = 22.9 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 5.77 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 1.82 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 22 
 Blind Sample ID = 75DIW-25139  Mean = 8.39 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 38 
 Blind Sample ID = 67DW-33113  Mean = 5.50 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 16 
 Blind Sample ID = 50DW-50125  Mean = 10.97 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50123  Mean = 4.25 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50121  Mean = 3.94 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 16 
 Blind Sample ID = 50DW-50117  Mean = 8.48 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 31 
 Blind Sample ID = 50DW-50115  Mean = 7.77 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 20 
 Blind Sample ID = 50DIW-50143  Mean = 3.03 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 1.03 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 11 
 Blind Sample ID = 50DIW-50136  Mean = 7.69 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 7 
 Blind Sample ID = 50DIW-50135  Mean = 13.95 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 22 
 Blind Sample ID = 50DIW-50133  Mean = 10.83 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 23 
 Blind Sample ID = 50DIW-50123  Mean = 6.18 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 11 
 Blind Sample ID = 5097/50DW  Mean = 9.20 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 1.40 
 % Relative Standard Deviation = 63.9 
 Number of Observations = 5 
 Blind Sample ID = 5095/50DW  Mean = 12.43 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 14 
 Blind Sample ID = 50143-50145  Mean = 6.94 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 52 
 Blind Sample ID = 50139-50141  Mean = 8.75 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 4 
 Blind Sample ID = 50137-50143  Mean = 3.48 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 12 
 Blind Sample ID = 50137-50139  Mean = 1.04 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 11 
 Blind Sample ID = 50136-50138  Mean = 9.58 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 42 
 Blind Sample ID = 50135-50139  Mean = 1.43 
 % Relative Standard Deviation = 33.7 
 Number of Observations = 19 
 Blind Sample ID = 50134-50136  Mean = 18.07 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 14 
 Blind Sample ID = 50125-50133  Mean = 15.65 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 40 
 Blind Sample ID = 50125-50123  Mean = 15.00 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 5.63 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 7.85 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 13 
 Blind Sample ID = 50117-50121  Mean = 9.25 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 17.87 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 15 
 Blind Sample ID = 50107-50113  Mean = 10.31 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 16 
 Blind Sample ID = 50101-50107  Mean = 5.77 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 30 
 Blind Sample ID = 5007/50DW  Mean = 8.07 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 14 
 Blind Sample ID = 5007/5003  Mean = 2.09 
 % Relative Standard Deviation = 27.7 
 Number of Observations = 33 
 Blind Sample ID = 5003/50DW  Mean = 6.00 
 % Relative Standard Deviation = 56.1 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 3.13 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 38 
 Blind Sample ID = 5003/5005  Mean = 4.00 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 10 
 Blind Sample ID = 33DW/6799  Mean = 8.21 
 % Relative Standard Deviation = 17.0 
 Number of Observations = 39 
 Blind Sample ID = 33DW/6797  Mean = 3.72 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 53 
 Blind Sample ID = 33DW/6793  Mean = 1.75 
 % Relative Standard Deviation = 28.6 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6787  Mean = 3.80 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 10 
 Blind Sample ID = 33DW/6785  Mean = 7.89 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 35 
 Blind Sample ID = 33DW/6707  Mean = 1.61 
 % Relative Standard Deviation = 31.0 
 Number of Observations = 23 
 Blind Sample ID = 33DW/6705  Mean = 2.55 
 % Relative Standard Deviation = 19.8 
 Number of Observations = 42 
 Blind Sample ID = 33DW/6703  Mean = 14.63 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 5.98 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 46 
 Blind Sample ID = 33DW-67121  Mean = 10.13 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 16 
 Blind Sample ID = 33DW-67115  Mean = 2.13 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67105  Mean = 2.55 
 % Relative Standard Deviation = 28.4 
 Number of Observations = 31 
 Blind Sample ID = 33DW-67103  Mean = 7.77 
 % Relative Standard Deviation = 24.0 
 Number of Observations = 26 
 Blind Sample ID = 33DIW-67135  Mean = 1.33 
 % Relative Standard Deviation = 43.3 
 Number of Observations = 3 
 Blind Sample ID = 33DIW-67134  Mean = 41.31 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 35 
 Blind Sample ID = 33DIW-67131  Mean = 3.00 
 % Relative Standard Deviation = 15.9 
 Number of Observations = 45 
 Blind Sample ID = 33DIW-67127  Mean = 4.71 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7599  Mean = 9.83 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 36 
 Blind Sample ID = 25DW/7597  Mean = 4.10 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575  Mean = 8.92 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7507  Mean = 2.58 
 % Relative Standard Deviation = 19.3 
 Number of Observations = 43 
 Blind Sample ID = 25DW/7503  Mean = 6.50 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75121  Mean = 18.84 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 31 
 Blind Sample ID = 25DW-75113  Mean = 2.26 
 % Relative Standard Deviation = 22.8 
 Number of Observations = 31 
 Blind Sample ID = 25DW-75105  Mean = 2.97 
 % Relative Standard Deviation = 23.4 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75103  Mean = 11.52 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75143  Mean = 8.97 
 % Relative Standard Deviation = 19.1 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 46.10 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 10 
 Blind Sample ID = 25DIW-75131  Mean = 3.40 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 20 
 Blind Sample ID = 25DIW-75127  Mean = 7.75 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 13.25 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 4 
 Blind Sample ID = 25145-75143  Mean = 2.20 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137  Mean = 9.77 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 19 
 Blind Sample ID = 25137-75135  Mean = 9.43 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 8.83 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 5.00 
 % Relative Standard Deviation = 31.8 
 Number of Observations = 16 
 Blind Sample ID = 25107-75105  Mean = 6.26 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501
The SGPlot Procedure



- Arsenic, UNF, EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01002, MCode: GF031
Dates: 10/30/97 through 09/18/00
Open Data Set

 Mean = 7.02 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 4 
 Blind Sample ID = 50DIW-50143  Mean = 1.11 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75147  Mean = 11.19 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75143  Mean = 24.52 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 4 
 Blind Sample ID = 25151-75155  Mean = 3.92 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 4 
 Blind Sample ID = 25145-75147
The SGPlot Procedure



- Arsenic, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01002, MCode: GF096
Dates: 10/09/98 through 09/24/01
Open Data Set

 Mean = 8.34 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 4 
 Blind Sample ID = 75DIW-25155  Mean = 4.32 
 % Relative Standard Deviation = 33.7 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 12.24 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 15.41 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 21.30 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75159  Mean = 1.68 
 % Relative Standard Deviation = 14.5 
 Number of Observations = 10 
 Blind Sample ID = 25DIW-75147  Mean = 11.42 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75143  Mean = 31.19 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 27.85 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 27.21 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 10.00 
 % Relative Standard Deviation = 0.4 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147  Mean = 24.40 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 7.96 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 4.18 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147
The SGPlot Procedure



- Arsenic, UNF, GFAA-EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01002, MCode: GF073
Dates: 05/17/91 through 09/19/97
Open Data Set

 Mean = 2.63 
 % Relative Standard Deviation = 19.7 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25125  Mean = 2.00 
 % Relative Standard Deviation = 28.9 
 Number of Observations = 7 
 Blind Sample ID = 75DW-25117  Mean = 2.27 
 % Relative Standard Deviation = 28.5 
 Number of Observations = 11 
 Blind Sample ID = 75DIW-25125  Mean = 4.88 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50125  Mean = 3.63 
 % Relative Standard Deviation = 20.5 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50117  Mean = 2.70 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 6 
 Blind Sample ID = 50DIW-50139  Mean = 4.99 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 18.50 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 4 
 Blind Sample ID = 50125-50133  Mean = 16.25 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 50125-50123  Mean = 19.38 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 8 
 Blind Sample ID = 50107-50113  Mean = 9.13 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 8 
 Blind Sample ID = 50101-50107  Mean = 6.38 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 8 
 Blind Sample ID = 25DW-75121  Mean = 1.88 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 8 
 Blind Sample ID = 25DW-75105  Mean = 7.78 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75135  Mean = 43.38 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75131  Mean = 5.63 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 8 
 Blind Sample ID = 25107-75105  Mean = 6.42 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 19 
 Blind Sample ID = 2503/7501
The SGPlot Procedure



- Arsenic, UNF, Hydride, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01002, MCode: HY013
Dates: 11/12/86 through 09/24/98
Open Data Set

 Mean = 6.33 
 % Relative Standard Deviation = 21.6 
 Number of Observations = 6 
 Blind Sample ID = STS2  Mean = 9.25 
 % Relative Standard Deviation = 35.7 
 Number of Observations = 4 
 Blind Sample ID = STS1  Mean = 5.79 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 14 
 Blind Sample ID = ST99  Mean = 5.50 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 8.36 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 39 
 Blind Sample ID = 67DW-33113  Mean = 3.84 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 19 
 Blind Sample ID = 50DW/5001  Mean = 5.33 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 3.92 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50117  Mean = 4.11 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 8.01 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 3.29 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 7.74 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 6 
 Blind Sample ID = 50DIW-50135  Mean = 9.20 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 13.25 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 8 
 Blind Sample ID = 50143-50145  Mean = 7.90 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 4.65 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 8.03 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 5 
 Blind Sample ID = 50135-50137  Mean = 18.27 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 11 
 Blind Sample ID = 50125-50133  Mean = 15.82 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 28 
 Blind Sample ID = 50125-50123  Mean = 15.75 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 5.63 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 8.40 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 9.94 
 % Relative Standard Deviation = 20.3 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 11.00 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 10 
 Blind Sample ID = 50101-50115  Mean = 7.60 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 15 
 Blind Sample ID = 5007/5003  Mean = 7.75 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 9.25 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 5.56 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 9 
 Blind Sample ID = 5001/5003  Mean = 4.40 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 3.38 
 % Relative Standard Deviation = 27.1 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 3.89 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 1.96 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 23 
 Blind Sample ID = 33DW/6705  Mean = 14.38 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 6.00 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 14 
 Blind Sample ID = 33DW-67121  Mean = 10.06 
 % Relative Standard Deviation = 18.4 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 8.67 
 % Relative Standard Deviation = 21.5 
 Number of Observations = 6 
 Blind Sample ID = 33DIW-67135  Mean = 40.83 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 2.43 
 % Relative Standard Deviation = 22.0 
 Number of Observations = 7 
 Blind Sample ID = 3399/67DW  Mean = 7.42 
 % Relative Standard Deviation = 37.9 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 18.08 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 24 
 Blind Sample ID = 25DW-75113  Mean = 2.92 
 % Relative Standard Deviation = 42.5 
 Number of Observations = 12 
 Blind Sample ID = 25DW-75105  Mean = 12.13 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75143  Mean = 8.88 
 % Relative Standard Deviation = 23.6 
 Number of Observations = 14 
 Blind Sample ID = 25DIW-75135  Mean = 44.55 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 11 
 Blind Sample ID = 25DIW-75131  Mean = 3.31 
 % Relative Standard Deviation = 14.5 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75127  Mean = 6.75 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 2.15 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137  Mean = 10.14 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 8.73 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 11 
 Blind Sample ID = 25123-75127  Mean = 6.15 
 % Relative Standard Deviation = 14.2 
 Number of Observations = 20 
 Blind Sample ID = 2503/7501
The SGPlot Procedure



- Barium, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01005, MCode: AA003
Dates: 11/12/86 through 03/27/96
Open Data Set

 Mean = 120.00 
 % Relative Standard Deviation = 34.5 
 Number of Observations = 15 
 Blind Sample ID = 5011/5007  Mean = 134.15 
 % Relative Standard Deviation = 48.9 
 Number of Observations = 41 
 Blind Sample ID = 5007/5003  Mean = 150.00 
 % Relative Standard Deviation = 34.8 
 Number of Observations = 12 
 Blind Sample ID = 5003/5001  Mean = 233.33 
 % Relative Standard Deviation = 24.7 
 Number of Observations = 3 
 Blind Sample ID = 33DW-67115  Mean = 333.33 
 % Relative Standard Deviation = 19.5 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 391.67 
 % Relative Standard Deviation = 23.0 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131
The SGPlot Procedure



- Barium, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01005, MCode: PLM43
Dates: 02/07/94 through 09/27/01
Open Data Set

 Mean = 25.98 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 34 
 Blind Sample ID = GT3  Mean = 5.59 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25155  Mean = 11.10 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 16.25 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 32 
 Blind Sample ID = 75DIW-25137  Mean = 4.19 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25125  Mean = 19.01 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 41.66 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 33.37 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 59.99 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 10.29 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 63.17 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 27 
 Blind Sample ID = 50143-50151  Mean = 60.66 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 65.23 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 84.33 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 12.55 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 31 
 Blind Sample ID = 50125-50123  Mean = 57.74 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 146.97 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 27.04 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 65.79 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 19.87 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 58.94 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Barium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01005, MCode: PLA11
Dates: 10/14/86 through 09/27/01
Open Data Set

 Mean = 94.78 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 39.00 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 67.50 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 33.08 
 % Relative Standard Deviation = 0.8 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 171.43 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 221.67 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 10.08 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25151  Mean = 23.23 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 40 
 Blind Sample ID = 67DW-33113  Mean = 40.70 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 21.93 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 31.86 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50137  Mean = 32.66 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 43.54 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 24 
 Blind Sample ID = 5099/5093  Mean = 94.38 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  Mean = 56.52 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 31 
 Blind Sample ID = 5097/5099  Mean = 78.00 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 25 
 Blind Sample ID = 5097/5001  Mean = 63.10 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 41 
 Blind Sample ID = 5093/5087  Mean = 59.21 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 12 
 Blind Sample ID = 50157-50DIW  Mean = 10.43 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 10 
 Blind Sample ID = 50155-50DIW  Mean = 60.97 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 22 
 Blind Sample ID = 50143-50151  Mean = 59.81 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 22 
 Blind Sample ID = 50143-50145  Mean = 40.52 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 26 
 Blind Sample ID = 50139-50145  Mean = 50.28 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 65.34 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 264.38 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 41.88 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 26.70 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 30 
 Blind Sample ID = 50123-50121  Mean = 31.29 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 26.37 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 60 
 Blind Sample ID = 50121-50105  Mean = 143.50 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 60 
 Blind Sample ID = 50115-50103  Mean = 116.33 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 50.50 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 49.80 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 119.60 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 130.16 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 61 
 Blind Sample ID = 5007/5001  Mean = 68.00 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 18 
 Blind Sample ID = 5003/5097  Mean = 49.81 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 62.63 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6797  Mean = 45.13 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 132.50 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 27.38 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6703  Mean = 30.31 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 13 
 Blind Sample ID = 33DW-67121  Mean = 166.15 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 13 
 Blind Sample ID = 33DW-67115  Mean = 44.00 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 4 
 Blind Sample ID = 33DIW-67135  Mean = 103.21 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 28 
 Blind Sample ID = 33127-67133  Mean = 12.03 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 31 
 Blind Sample ID = 33127-67123  Mean = 71.72 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 29.68 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  Mean = 19.93 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7511  Mean = 150.83 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 30.47 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 33.87 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75121  Mean = 29.10 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 6 
 Blind Sample ID = 25DIW-75159  Mean = 138.16 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 30.38 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 33 
 Blind Sample ID = 25DIW-75151  Mean = 55.20 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75147  Mean = 61.90 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 49.51 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 29 
 Blind Sample ID = 25DIW-75135  Mean = 375.56 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 15.22 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 55 
 Blind Sample ID = 25DIW-75127  Mean = 50.06 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 25.35 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 5 
 Blind Sample ID = 25159-75155  Mean = 57.52 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 11 
 Blind Sample ID = 25157-75159  Mean = 97.77 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 6 
 Blind Sample ID = 25155-75157  Mean = 141.44 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 12 
 Blind Sample ID = 25155-75153  Mean = 60.79 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 12 
 Blind Sample ID = 25155-75147  Mean = 25.98 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 45.84 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 26 
 Blind Sample ID = 25147-75145  Mean = 64.17 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 42.03 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 59.45 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 24 
 Blind Sample ID = 25139-75137  Mean = 52.20 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 20 
 Blind Sample ID = 25133-75127  Mean = 17.79 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 19.40 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 104 
 Blind Sample ID = 25125-75127  Mean = 56.22 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 46 
 Blind Sample ID = 25125-75113  Mean = 17.17 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 75.41 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 41 
 Blind Sample ID = 25117-75113  Mean = 66.62 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 39 
 Blind Sample ID = 25101-75113  Mean = 57.60 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 47.27 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 22 
 Blind Sample ID = 2505/7501  Mean = 30.50 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 52.21 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 20.77 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 308.60 
 % Relative Standard Deviation = 48.2 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Barium, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01007, MCode: AA042
Dates: 10/14/86 through 10/08/97
Open Data Set

 Mean = 150.00 
 % Relative Standard Deviation = 35.6 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 125.00 
 % Relative Standard Deviation = 40.0 
 Number of Observations = 4 
 Blind Sample ID = STS1  Mean = 116.67 
 % Relative Standard Deviation = 44.1 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 131.25 
 % Relative Standard Deviation = 36.5 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 114.29 
 % Relative Standard Deviation = 31.8 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 121.43 
 % Relative Standard Deviation = 35.1 
 Number of Observations = 14 
 Blind Sample ID = 5007/5003  Mean = 125.00 
 % Relative Standard Deviation = 40.0 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 120.00 
 % Relative Standard Deviation = 37.3 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 110.00 
 % Relative Standard Deviation = 28.0 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6705  Mean = 170.59 
 % Relative Standard Deviation = 27.5 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 308.33 
 % Relative Standard Deviation = 25.7 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 123.08 
 % Relative Standard Deviation = 35.6 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7507  Mean = 350.00 
 % Relative Standard Deviation = 33.4 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131
The SGPlot Procedure



- Barium, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01007, MCode: PLA15
Dates: 03/26/99 through 09/24/01
Open Data Set

 Mean = 9.79 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 5 
 Blind Sample ID = 75DIW-25151  Mean = 27.57 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75159  Mean = 131.78 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 52.12 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75147  Mean = 59.02 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75143  Mean = 24.14 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 90.33 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 25.10 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 61.51 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 4 
 Blind Sample ID = 25145-75147
The SGPlot Procedure



- Beryllium, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01010, MCode: PLM43
Dates: 02/07/94 through 08/28/01
Open Data Set

 Mean = 15.32 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 34 
 Blind Sample ID = GT3  Mean = 2.78 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 1.32 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 32 
 Blind Sample ID = 75DIW-25137  Mean = 4.06 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25125  Mean = 4.54 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 4.28 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 30.17 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 6.74 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 17.07 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 27 
 Blind Sample ID = 50143-50151  Mean = 8.80 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 33.05 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 25.73 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 11.45 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 31 
 Blind Sample ID = 50125-50123  Mean = 11.59 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 6.55 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 14.08 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 14.15 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 11.94 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Beryllium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01010, MCode: PLA11
Dates: 10/14/86 through 08/23/01
Open Data Set

 Mean = 1.27 
 % Relative Standard Deviation = 174.9 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 5.85 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 11.00 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 4.66 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 43.33 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 6.50 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25151  Mean = 3.32 
 % Relative Standard Deviation = 19.3 
 Number of Observations = 41 
 Blind Sample ID = 67DW-33113  Mean = 5.07 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 29.50 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 5.83 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 4.58 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  Mean = 2.46 
 % Relative Standard Deviation = 44.0 
 Number of Observations = 31 
 Blind Sample ID = 5097/5099  Mean = 7.02 
 % Relative Standard Deviation = 22.4 
 Number of Observations = 25 
 Blind Sample ID = 5097/5001  Mean = 3.61 
 % Relative Standard Deviation = 33.6 
 Number of Observations = 41 
 Blind Sample ID = 5093/5087  Mean = 6.59 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 12 
 Blind Sample ID = 50157-50DIW  Mean = 17.53 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 16 
 Blind Sample ID = 50143-50151  Mean = 8.96 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 22 
 Blind Sample ID = 50143-50145  Mean = 9.56 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 26 
 Blind Sample ID = 50139-50145  Mean = 7.08 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 32.67 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 13.69 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 37.64 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 9.47 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 30 
 Blind Sample ID = 50123-50121  Mean = 13.13 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 14.62 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 60 
 Blind Sample ID = 50121-50105  Mean = 28.87 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 60 
 Blind Sample ID = 50115-50103  Mean = 9.74 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 11.31 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 9.77 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 7.92 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 13.10 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 60 
 Blind Sample ID = 5007/5001  Mean = 2.14 
 % Relative Standard Deviation = 44.8 
 Number of Observations = 19 
 Blind Sample ID = 5003/5097  Mean = 9.67 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 0.51 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6797  Mean = 4.41 
 % Relative Standard Deviation = 23.8 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 5.22 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  Mean = 7.70 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 2.42 
 % Relative Standard Deviation = 32.3 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6703  Mean = 5.44 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 7.22 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 13 
 Blind Sample ID = 33DW-67121  Mean = 35.23 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 13 
 Blind Sample ID = 33DW-67115  Mean = 39.00 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 4 
 Blind Sample ID = 33DIW-67135  Mean = 0.53 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  Mean = 6.20 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7511  Mean = 8.70 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7507  Mean = 3.06 
 % Relative Standard Deviation = 21.3 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 7.82 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75121  Mean = 19.54 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 21 
 Blind Sample ID = 25DIW-75151  Mean = 6.59 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75143  Mean = 44.57 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 29 
 Blind Sample ID = 25DIW-75135  Mean = 9.14 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 11.11 
 % Relative Standard Deviation = 24.6 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 11.44 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 11.76 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 12 
 Blind Sample ID = 25155-75147  Mean = 10.94 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 10 
 Blind Sample ID = 25147-75145  Mean = 14.78 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 9.90 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 6.40 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 24 
 Blind Sample ID = 25139-75137  Mean = 19.60 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 20 
 Blind Sample ID = 25133-75127  Mean = 14.86 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 14.32 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 41 
 Blind Sample ID = 25125-75127  Mean = 11.61 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 46 
 Blind Sample ID = 25125-75113  Mean = 12.46 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 9.17 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 41 
 Blind Sample ID = 25117-75113  Mean = 11.85 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 39 
 Blind Sample ID = 25101-75113  Mean = 16.80 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 14.91 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501  Mean = 8.38 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 21.30 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 16.69 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 10.20 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Beryllium, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01012, MCode: AA043
Dates: 10/14/86 through 02/16/99
Open Data Set

 Mean = 57.50 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 22.50 
 % Relative Standard Deviation = 46.1 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 19.23 
 % Relative Standard Deviation = 39.5 
 Number of Observations = 13 
 Blind Sample ID = 50125-50133  Mean = 32.73 
 % Relative Standard Deviation = 19.8 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 11.43 
 % Relative Standard Deviation = 31.8 
 Number of Observations = 14 
 Blind Sample ID = 25DW-75105  Mean = 10.63 
 % Relative Standard Deviation = 23.5 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75127  Mean = 10.13 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139
The SGPlot Procedure



- Beryllium, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01012, MCode: PLA15
Dates: 03/29/99 through 08/17/01
Open Data Set

 Mean = 6.34 
 % Relative Standard Deviation = 13.7 
 Number of Observations = 5 
 Blind Sample ID = 75DIW-25151  Mean = 4.83 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 4 
 Blind Sample ID = 50DIW-50145  Mean = 6.36 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 11.70 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75147  Mean = 10.73 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 11.81 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147  Mean = 11.07 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 4 
 Blind Sample ID = 25147-75145
The SGPlot Procedure



- Boron, FIL, DCP -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01020, MCode: DCP03
Dates: 10/01/86 through 06/05/96
Open Data Set

 Mean = 19.09 
 % Relative Standard Deviation = 27.6 
 Number of Observations = 22 
 Blind Sample ID = STM6  Mean = 18.75 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 16 
 Blind Sample ID = ST98  Mean = 94.71 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 17 
 Blind Sample ID = ST96  Mean = 218.67 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 30 
 Blind Sample ID = ST94  Mean = 30.50 
 % Relative Standard Deviation = 16.7 
 Number of Observations = 20 
 Blind Sample ID = ST82  Mean = 431.11 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 18 
 Blind Sample ID = ST00  Mean = 12.50 
 % Relative Standard Deviation = 37.0 
 Number of Observations = 8 
 Blind Sample ID = 50M6/50DW  Mean = 49.05 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 21 
 Blind Sample ID = 50DW/5096  Mean = 15.00 
 % Relative Standard Deviation = 38.5 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5082  Mean = 10.71 
 % Relative Standard Deviation = 24.9 
 Number of Observations = 14 
 Blind Sample ID = 50DW/5012  Mean = 137.22 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 18 
 Blind Sample ID = 50DW/5008  Mean = 53.57 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 14 
 Blind Sample ID = 50DW/5004  Mean = 215.00 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5000  Mean = 150.83 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 24 
 Blind Sample ID = 50DW-50124  Mean = 11.67 
 % Relative Standard Deviation = 33.4 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50122  Mean = 45.33 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 30 
 Blind Sample ID = 50DW-50121  Mean = 90.83 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50118  Mean = 50.36 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 28 
 Blind Sample ID = 50DW-50115  Mean = 10.19 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 52 
 Blind Sample ID = 50DW-50112  Mean = 57.50 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50104  Mean = 149.41 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 17 
 Blind Sample ID = 50DIW-50133  Mean = 146.00 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 30 
 Blind Sample ID = 50DIW-50128  Mean = 10.42 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50123  Mean = 12.86 
 % Relative Standard Deviation = 58.8 
 Number of Observations = 7 
 Blind Sample ID = 5098/50DW  Mean = 61.67 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 6 
 Blind Sample ID = 5098/5004  Mean = 198.18 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 11 
 Blind Sample ID = 5097/50DW  Mean = 46.92 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 13 
 Blind Sample ID = 5096/50DW  Mean = 115.00 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 4 
 Blind Sample ID = 5094/50M6  Mean = 115.33 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 15 
 Blind Sample ID = 5094/50M4  Mean = 125.71 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 7 
 Blind Sample ID = 5094/5082  Mean = 63.75 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 16 
 Blind Sample ID = 5014/5096  Mean = 28.00 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 10 
 Blind Sample ID = 5014/5012  Mean = 163.75 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 8 
 Blind Sample ID = 50128-50134  Mean = 163.00 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 10 
 Blind Sample ID = 50128-50132  Mean = 153.33 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 12 
 Blind Sample ID = 50126-50128  Mean = 156.67 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 12 
 Blind Sample ID = 50126-50124  Mean = 12.50 
 % Relative Standard Deviation = 36.2 
 Number of Observations = 12 
 Blind Sample ID = 50126-50122  Mean = 165.83 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 24 
 Blind Sample ID = 50120-50128  Mean = 174.17 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 12 
 Blind Sample ID = 50120-50124  Mean = 34.17 
 % Relative Standard Deviation = 23.2 
 Number of Observations = 12 
 Blind Sample ID = 50120-50112  Mean = 28.00 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 10 
 Blind Sample ID = 50114-50112  Mean = 115.00 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 12 
 Blind Sample ID = 50110-50118  Mean = 32.50 
 % Relative Standard Deviation = 29.7 
 Number of Observations = 12 
 Blind Sample ID = 50110-50112  Mean = 28.67 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 22.14 
 % Relative Standard Deviation = 26.1 
 Number of Observations = 14 
 Blind Sample ID = 50106-50112  Mean = 68.33 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 6 
 Blind Sample ID = 50106-50104  Mean = 164.62 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 13 
 Blind Sample ID = 5010/5008  Mean = 84.00 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 15 
 Blind Sample ID = 5010/5004  Mean = 71.79 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 28 
 Blind Sample ID = 5007/50DW  Mean = 68.33 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 12 
 Blind Sample ID = 5006/5004  Mean = 54.58 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 24 
 Blind Sample ID = 5004/50DW  Mean = 55.00 
 % Relative Standard Deviation = 15.6 
 Number of Observations = 26 
 Blind Sample ID = 5003/50DW  Mean = 210.00 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 6 
 Blind Sample ID = 5002/5004  Mean = 223.00 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 10 
 Blind Sample ID = 5000/5098  Mean = 271.11 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 18 
 Blind Sample ID = 5000/5096  Mean = 370.00 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 6 
 Blind Sample ID = 5000/5002  Mean = 338.00 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 17.27 
 % Relative Standard Deviation = 52.4 
 Number of Observations = 11 
 Blind Sample ID = 33DW/6798  Mean = 22.73 
 % Relative Standard Deviation = 27.8 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6714  Mean = 10.67 
 % Relative Standard Deviation = 24.2 
 Number of Observations = 15 
 Blind Sample ID = 33DW/6712  Mean = 32.11 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 19 
 Blind Sample ID = 33DW/6710  Mean = 182.27 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6708  Mean = 94.17 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6707  Mean = 18.33 
 % Relative Standard Deviation = 31.5 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6706  Mean = 73.13 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 16 
 Blind Sample ID = 33DW/6703  Mean = 200.53 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 19 
 Blind Sample ID = 33DW/6702  Mean = 291.90 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 21 
 Blind Sample ID = 33DW/6700  Mean = 11.30 
 % Relative Standard Deviation = 30.5 
 Number of Observations = 23 
 Blind Sample ID = 33DW-67126  Mean = 62.90 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 31 
 Blind Sample ID = 33DW-67121  Mean = 29.22 
 % Relative Standard Deviation = 16.5 
 Number of Observations = 51 
 Blind Sample ID = 33DW-67120  Mean = 120.00 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 26 
 Blind Sample ID = 33DW-67118  Mean = 24.17 
 % Relative Standard Deviation = 20.8 
 Number of Observations = 24 
 Blind Sample ID = 33DW-67114  Mean = 33.70 
 % Relative Standard Deviation = 22.0 
 Number of Observations = 27 
 Blind Sample ID = 33DW-67110  Mean = 17.78 
 % Relative Standard Deviation = 23.8 
 Number of Observations = 27 
 Blind Sample ID = 33DW-67106  Mean = 107.50 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 28 
 Blind Sample ID = 33DW-67105  Mean = 75.71 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 28 
 Blind Sample ID = 33DW-67104  Mean = 76.90 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 29 
 Blind Sample ID = 33DW-67103  Mean = 15.56 
 % Relative Standard Deviation = 46.7 
 Number of Observations = 9 
 Blind Sample ID = 33DIW-67135  Mean = 22.35 
 % Relative Standard Deviation = 37.2 
 Number of Observations = 17 
 Blind Sample ID = 33DIW-67134  Mean = 24.00 
 % Relative Standard Deviation = 40.3 
 Number of Observations = 10 
 Blind Sample ID = 33DIW-67132  Mean = 93.04 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 23 
 Blind Sample ID = 33DIW-67131  Mean = 10.59 
 % Relative Standard Deviation = 22.9 
 Number of Observations = 17 
 Blind Sample ID = 33DIW-67130  Mean = 30.71 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 42 
 Blind Sample ID = 33DIW-67127  Mean = 10.43 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 23 
 Blind Sample ID = 33DIW-67126  Mean = 11.30 
 % Relative Standard Deviation = 30.5 
 Number of Observations = 23 
 Blind Sample ID = 33DIW-67122  Mean = 29.57 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 23 
 Blind Sample ID = 33DIW-67120  Mean = 386.00 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7599  Mean = 456.67 
 % Relative Standard Deviation = 51.8 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7597  Mean = 15.00 
 % Relative Standard Deviation = 34.8 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7512  Mean = 99.17 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 81.25 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 24 
 Blind Sample ID = 25DW/7503  Mean = 69.00 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 30 
 Blind Sample ID = 25DW-75121  Mean = 119.67 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 30 
 Blind Sample ID = 25DW-75105  Mean = 83.67 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 30 
 Blind Sample ID = 25DW-75103  Mean = 22.22 
 % Relative Standard Deviation = 19.8 
 Number of Observations = 9 
 Blind Sample ID = 25DIW-75132  Mean = 33.33 
 % Relative Standard Deviation = 19.5 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75120  Mean = 224.00 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 5 
 Blind Sample ID = 25122-75128  Mean = 26.82 
 % Relative Standard Deviation = 128.9 
 Number of Observations = 22 
 Blind Sample ID =
The SGPlot Procedure



- Boron, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01020, MCode: PLA13
Dates: 06/07/96 through 09/27/01
Open Data Set

 Mean = 23.92 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25155  Mean = 10.39 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 6 
 Blind Sample ID = 75DIW-25151  Mean = 12.81 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 27 
 Blind Sample ID = 75DIW-25144  Mean = 8.94 
 % Relative Standard Deviation = 32.3 
 Number of Observations = 21 
 Blind Sample ID = 75DIW-25139  Mean = 24.10 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 5.20 
 % Relative Standard Deviation = 29.1 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50138  Mean = 102.24 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 52 
 Blind Sample ID = 50DIW-50136  Mean = 151.17 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 6 
 Blind Sample ID = 50DIW-50133  Mean = 4.46 
 % Relative Standard Deviation = 31.3 
 Number of Observations = 30 
 Blind Sample ID = 50DIW-50130  Mean = 144.67 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 6 
 Blind Sample ID = 50DIW-50128  Mean = 33.15 
 % Relative Standard Deviation = 25.7 
 Number of Observations = 8 
 Blind Sample ID = 50157-50DIW  Mean = 48.71 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 6 
 Blind Sample ID = 50152-50DIW  Mean = 84.65 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 34 
 Blind Sample ID = 50142-50144  Mean = 44.51 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 18 
 Blind Sample ID = 50140-50144  Mean = 31.08 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 26 
 Blind Sample ID = 50139-50141  Mean = 26.42 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 8 
 Blind Sample ID = 50137-50139  Mean = 104.19 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 30 
 Blind Sample ID = 50136-50138  Mean = 23.57 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 23 
 Blind Sample ID = 50135-50139  Mean = 38.06 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 18 
 Blind Sample ID = 50134-50140  Mean = 118.67 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 68 
 Blind Sample ID = 50134-50136  Mean = 29.64 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 13 
 Blind Sample ID = 50132-50134  Mean = 105.58 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 30 
 Blind Sample ID = 50130-50136  Mean = 158.00 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 3 
 Blind Sample ID = 50128-50134  Mean = 159.88 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 8 
 Blind Sample ID = 50128-50132  Mean = 48.79 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 4 
 Blind Sample ID = 50004-50DIW  Mean = 9.01 
 % Relative Standard Deviation = 35.1 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67135  Mean = 22.38 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 6 
 Blind Sample ID = 33DIW-67134  Mean = 19.78 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67132  Mean = 7.07 
 % Relative Standard Deviation = 22.4 
 Number of Observations = 6 
 Blind Sample ID = 33DIW-67130  Mean = 28.53 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 3 
 Blind Sample ID = 33DIW-67127  Mean = 20.24 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 7 
 Blind Sample ID = 25DIW-75159  Mean = 39.13 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75147  Mean = 35.17 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 60 
 Blind Sample ID = 25DIW-75144  Mean = 23.30 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 3 
 Blind Sample ID = 25DIW-75132  Mean = 35.78 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 8 
 Blind Sample ID = 25157-75159  Mean = 61.50 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 8 
 Blind Sample ID = 25155-75147  Mean = 26.70 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 5 
 Blind Sample ID = 25152-75150  Mean = 72.79 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 40 
 Blind Sample ID = 25150-75004  Mean = 50.76 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 36.87 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 18 
 Blind Sample ID = 25146-75144  Mean = 92.69 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 33 
 Blind Sample ID = 25146-75142  Mean = 9.69 
 % Relative Standard Deviation = 23.5 
 Number of Observations = 9 
 Blind Sample ID = 25146-75138  Mean = 22.08 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 26 
 Blind Sample ID = 25144-75146  Mean = 102.57 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 28 
 Blind Sample ID = 25144-75142  Mean = 15.63 
 % Relative Standard Deviation = 15.8 
 Number of Observations = 32 
 Blind Sample ID = 25140-75138  Mean = 21.24 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137  Mean = 32.48 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 26 
 Blind Sample ID = 25138-75140  Mean = 161.87 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 22 
 Blind Sample ID = 25134-75136  Mean = 9.47 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 3 
 Blind Sample ID = 25132-75130  Mean = 92.70 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 39 
 Blind Sample ID = 25004-75152
The SGPlot Procedure



- Boron, UNF, DCP -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01022, MCode: DCP06
Dates: 10/28/97 through 02/08/99
Open Data Set

 Mean = 21.50 
 % Relative Standard Deviation = 31.9 
 Number of Observations = 4 
 Blind Sample ID = 50137-50143  Mean = 26.25 
 % Relative Standard Deviation = 33.4 
 Number of Observations = 4 
 Blind Sample ID = 50137-50139  Mean = 32.50 
 % Relative Standard Deviation = 47.0 
 Number of Observations = 4 
 Blind Sample ID = 25145-75143
The SGPlot Procedure



- Boron, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01022, MCode: PLA15
Dates: 03/08/99 through 09/14/01
Open Data Set

 Mean = 28.09 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 4 
 Blind Sample ID = 75DIW-25155  Mean = 33.21 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 44.29 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 45.58 
 % Relative Standard Deviation = 22.7 
 Number of Observations = 3 
 Blind Sample ID = 50147-50151  Mean = 37.50 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75147  Mean = 34.98 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 62.11 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147
The SGPlot Procedure



- Cadmium, FIL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01025, MCode: CX002
Dates: 10/14/86 through 05/08/89
Open Data Set

 Mean = 4.63 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 8.00 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 11 
 Blind Sample ID = 5097/50DW  Mean = 10.60 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 1.41 
 % Relative Standard Deviation = 43.8 
 Number of Observations = 17 
 Blind Sample ID = 5003/50DW  Mean = 3.00 
 % Relative Standard Deviation = 21.1 
 Number of Observations = 6 
 Blind Sample ID = 33DW/6799  Mean = 3.38 
 % Relative Standard Deviation = 35.2 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 2.00 
 % Relative Standard Deviation = 43.3 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 1.33 
 % Relative Standard Deviation = 43.3 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 3.40 
 % Relative Standard Deviation = 16.1 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7599  Mean = 12.50 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 4 
 Blind Sample ID = 25DW/7597  Mean = 5.70 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575
The SGPlot Procedure



- Cadmium, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01025, MCode: GF086
Dates: 05/15/89 through 09/24/01
Open Data Set

 Mean = 3.00 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25155  Mean = 6.88 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25151  Mean = 2.13 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 22 
 Blind Sample ID = 75DIW-25139  Mean = 1.78 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25137  Mean = 1.64 
 % Relative Standard Deviation = 29.6 
 Number of Observations = 39 
 Blind Sample ID = 67DW-33113  Mean = 7.42 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 31 
 Blind Sample ID = 50DW-50115  Mean = 4.64 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 9.64 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 7 
 Blind Sample ID = 50DIW-50143  Mean = 3.95 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 3.45 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50137  Mean = 25.37 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 7 
 Blind Sample ID = 50DIW-50135  Mean = 11.54 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50133  Mean = 3.08 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50123  Mean = 3.03 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 8 
 Blind Sample ID = 50157-50DIW  Mean = 8.19 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 26 
 Blind Sample ID = 50139-50141  Mean = 7.23 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 8 
 Blind Sample ID = 50137-50139  Mean = 30.16 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 23 
 Blind Sample ID = 50135-50139  Mean = 6.63 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 5.50 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 8.25 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 12.53 
 % Relative Standard Deviation = 21.9 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 16.64 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 7.80 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 30 
 Blind Sample ID = 5007/50DW  Mean = 8.73 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 41 
 Blind Sample ID = 5007/5003  Mean = 1.07 
 % Relative Standard Deviation = 24.2 
 Number of Observations = 15 
 Blind Sample ID = 5003/50DW  Mean = 9.33 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 3 
 Blind Sample ID = 5003/5097  Mean = 7.00 
 % Relative Standard Deviation = 25.8 
 Number of Observations = 12 
 Blind Sample ID = 5003/5001  Mean = 3.25 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6799  Mean = 11.45 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 11 
 Blind Sample ID = 33DW/6797  Mean = 8.46 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 9.64 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 14 
 Blind Sample ID = 33DW/6707  Mean = 2.00 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 23 
 Blind Sample ID = 33DW/6705  Mean = 1.79 
 % Relative Standard Deviation = 32.4 
 Number of Observations = 14 
 Blind Sample ID = 33DW/6703  Mean = 4.13 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 5.02 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 46 
 Blind Sample ID = 33DW-67121  Mean = 9.12 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 2.00 
 % Relative Standard Deviation = 18.6 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67105  Mean = 33.00 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 29 
 Blind Sample ID = 33DIW-67135  Mean = 4.06 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 36 
 Blind Sample ID = 33DIW-67131  Mean = 5.96 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 45 
 Blind Sample ID = 33DIW-67127  Mean = 2.00 
 % Relative Standard Deviation = 50.0 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 4.25 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 1.14 
 % Relative Standard Deviation = 31.4 
 Number of Observations = 21 
 Blind Sample ID = 3305/67DW  Mean = 11.89 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 9 
 Blind Sample ID = 25DW/7597  Mean = 10.07 
 % Relative Standard Deviation = 16.7 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7507  Mean = 1.83 
 % Relative Standard Deviation = 20.8 
 Number of Observations = 24 
 Blind Sample ID = 25DW/7503  Mean = 5.56 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75121  Mean = 2.23 
 % Relative Standard Deviation = 27.7 
 Number of Observations = 31 
 Blind Sample ID = 25DW-75105  Mean = 1.91 
 % Relative Standard Deviation = 15.5 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75103  Mean = 18.49 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75159  Mean = 12.04 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 12.38 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75147  Mean = 14.55 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 38.05 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 4.92 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 14.37 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 20.68 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 8 
 Blind Sample ID = 25157-75159  Mean = 7.18 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 14.83 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 8 
 Blind Sample ID = 25155-75147  Mean = 15.65 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 11.14 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 13.97 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 7.10 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137  Mean = 11.86 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 8.33 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 1.67 
 % Relative Standard Deviation = 34.6 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504  Mean = 4.06 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Cadmium, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01025, MCode: PLM43
Dates: 02/07/94 through 09/27/01
Open Data Set

 Mean = 46.09 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 34 
 Blind Sample ID = GT3  Mean = 2.94 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25155  Mean = 2.04 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 1.72 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 32 
 Blind Sample ID = 75DIW-25137  Mean = 1.94 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25125  Mean = 4.68 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 9.59 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 25.51 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 2.93 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 5.52 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 23.14 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 28 
 Blind Sample ID = 50143-50151  Mean = 13.99 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 28.45 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 15.07 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 6.48 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 31 
 Blind Sample ID = 50125-50123  Mean = 19.84 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 15.33 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 15.58 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 14.25 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 7.96 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 4.94 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Cadmium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01025, MCode: PLA11
Dates: 10/14/86 through 09/27/01
Open Data Set

 Mean = 16.18 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 5.38 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 1.92 
 % Relative Standard Deviation = 39.5 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 5.71 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 8.83 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 1.35 
 % Relative Standard Deviation = 44.8 
 Number of Observations = 17 
 Blind Sample ID = 67DW-33113  Mean = 4.12 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 4.46 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  Mean = 9.68 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 31 
 Blind Sample ID = 5097/5099  Mean = 12.21 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 24 
 Blind Sample ID = 5097/5001  Mean = 2.12 
 % Relative Standard Deviation = 35.3 
 Number of Observations = 41 
 Blind Sample ID = 5093/5087  Mean = 4.72 
 % Relative Standard Deviation = 43.5 
 Number of Observations = 8 
 Blind Sample ID = 50157-50DIW  Mean = 5.67 
 % Relative Standard Deviation = 21.4 
 Number of Observations = 13 
 Blind Sample ID = 50155-50DIW  Mean = 22.57 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 22 
 Blind Sample ID = 50143-50151  Mean = 13.94 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 22 
 Blind Sample ID = 50143-50145  Mean = 8.59 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 26 
 Blind Sample ID = 50139-50145  Mean = 6.98 
 % Relative Standard Deviation = 21.4 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 28.50 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 6.33 
 % Relative Standard Deviation = 20.3 
 Number of Observations = 46 
 Blind Sample ID = 50131-50125  Mean = 29.44 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 6.13 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 24 
 Blind Sample ID = 50123-50121  Mean = 7.38 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 4.61 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 44 
 Blind Sample ID = 50121-50105  Mean = 7.55 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 47 
 Blind Sample ID = 50115-50103  Mean = 17.94 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 2.58 
 % Relative Standard Deviation = 39.0 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 5.37 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 7.96 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 11.52 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 61 
 Blind Sample ID = 5007/5001  Mean = 8.72 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 18 
 Blind Sample ID = 5003/5097  Mean = 6.43 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 35 
 Blind Sample ID = 5003/5001  Mean = 10.67 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6797  Mean = 3.02 
 % Relative Standard Deviation = 27.8 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 10.15 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 1.54 
 % Relative Standard Deviation = 57.4 
 Number of Observations = 28 
 Blind Sample ID = 33DW/6703  Mean = 12.28 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 16.29 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7511  Mean = 12.09 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7507  Mean = 1.32 
 % Relative Standard Deviation = 36.3 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 5.00 
 % Relative Standard Deviation = 23.4 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75121  Mean = 20.06 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 33 
 Blind Sample ID = 25DIW-75151  Mean = 38.88 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 17 
 Blind Sample ID = 25DIW-75135  Mean = 4.00 
 % Relative Standard Deviation = 32.7 
 Number of Observations = 15 
 Blind Sample ID = 25DIW-75131  Mean = 7.19 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 19.83 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 15.05 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 12 
 Blind Sample ID = 25155-75153  Mean = 14.32 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 12 
 Blind Sample ID = 25155-75147  Mean = 11.03 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 26 
 Blind Sample ID = 25147-75145  Mean = 7.18 
 % Relative Standard Deviation = 18.6 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 8.47 
 % Relative Standard Deviation = 15.5 
 Number of Observations = 13 
 Blind Sample ID = 25139-75137  Mean = 11.94 
 % Relative Standard Deviation = 14.2 
 Number of Observations = 16 
 Blind Sample ID = 25133-75127  Mean = 7.71 
 % Relative Standard Deviation = 19.9 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 8.20 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 40 
 Blind Sample ID = 25125-75127  Mean = 4.78 
 % Relative Standard Deviation = 27.1 
 Number of Observations = 45 
 Blind Sample ID = 25125-75113  Mean = 8.00 
 % Relative Standard Deviation = 21.8 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 3.58 
 % Relative Standard Deviation = 25.2 
 Number of Observations = 40 
 Blind Sample ID = 25117-75113  Mean = 5.41 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 39 
 Blind Sample ID = 25101-75113  Mean = 9.73 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 7.52 
 % Relative Standard Deviation = 15.5 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501  Mean = 4.62 
 % Relative Standard Deviation = 14.1 
 Number of Observations = 13 
 Blind Sample ID = 2501/7599  Mean = 11.15 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 4.38 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 4.60 
 % Relative Standard Deviation = 33.0 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Cadmium, FILS, GFAA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01025, MCode: GF074
Dates: 03/06/87 through 09/13/95
Open Data Set

 Mean = 0.81 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25117  Mean = 0.79 
 % Relative Standard Deviation = 52.8 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25103  Mean = 1.73 
 % Relative Standard Deviation = 17.2 
 Number of Observations = 11 
 Blind Sample ID = 75DIW-25125  Mean = 1.64 
 % Relative Standard Deviation = 21.1 
 Number of Observations = 8 
 Blind Sample ID = 67DW-33113  Mean = 1.13 
 % Relative Standard Deviation = 25.5 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50117  Mean = 0.96 
 % Relative Standard Deviation = 24.2 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50103  Mean = 8.77 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 3 
 Blind Sample ID = 5097/50DW  Mean = 5.22 
 % Relative Standard Deviation = 18.6 
 Number of Observations = 23 
 Blind Sample ID = 5001/50DW  Mean = 4.87 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67121  Mean = 3.27 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7599  Mean = 3.80 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7593  Mean = 1.50 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 4 
 Blind Sample ID = 25DW/7585  Mean = 10.00 
 % Relative Standard Deviation = 45.8 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7507  Mean = 3.37 
 % Relative Standard Deviation = 34.3 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7505  Mean = 5.61 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 15 
 Blind Sample ID = 25DW-75121  Mean = 1.49 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 8 
 Blind Sample ID = 25DW-75103  Mean = 1.07 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 3 
 Blind Sample ID = 2599/75DW  Mean = 2.32 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 11 
 Blind Sample ID = 2501/75DW
The SGPlot Procedure



- Cadmium, UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01027, MCode: CX013
Dates: 10/14/86 through 04/27/89
Open Data Set

 Mean = 10.88 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 4.00 
 % Relative Standard Deviation = 50.0 
 Number of Observations = 4 
 Blind Sample ID = STS1  Mean = 4.69 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 13 
 Blind Sample ID = ST99  Mean = 5.06 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 17 
 Blind Sample ID = ST93  Mean = 4.50 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5001  Mean = 10.40 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 5.14 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 7 
 Blind Sample ID = 5001/5003  Mean = 3.75 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 1.33 
 % Relative Standard Deviation = 37.5 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 1.50 
 % Relative Standard Deviation = 38.5 
 Number of Observations = 4 
 Blind Sample ID = 3399/67DW  Mean = 2.20 
 % Relative Standard Deviation = 38.0 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7503
The SGPlot Procedure



- Cadmium, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01027, MCode: GF097
Dates: 05/08/89 through 09/28/01
Open Data Set

 Mean = 2.97 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 14 
 Blind Sample ID = 75DIW-25155  Mean = 6.82 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 24 
 Blind Sample ID = 75DIW-25151  Mean = 1.71 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 10 
 Blind Sample ID = 75DIW-25137  Mean = 1.49 
 % Relative Standard Deviation = 34.0 
 Number of Observations = 39 
 Blind Sample ID = 67DW-33113  Mean = 4.93 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  Mean = 3.67 
 % Relative Standard Deviation = 24.2 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 4.79 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 18 
 Blind Sample ID = 50DIW-50145  Mean = 9.21 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 3.86 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 3.36 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50137  Mean = 25.37 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 2.93 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 12 
 Blind Sample ID = 50157-50DIW  Mean = 5.48 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 14.00 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 8 
 Blind Sample ID = 50143-50145  Mean = 8.16 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 7.90 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 17 
 Blind Sample ID = 50139-50141  Mean = 7.75 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 28.74 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 16 
 Blind Sample ID = 50135-50139  Mean = 27.62 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 14.50 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 12 
 Blind Sample ID = 50125-50133  Mean = 6.54 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 28 
 Blind Sample ID = 50125-50123  Mean = 6.50 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 5.31 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 7.81 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 16.57 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 12.45 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 8.46 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 13 
 Blind Sample ID = 5007/5003  Mean = 9.75 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 15.20 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 10 
 Blind Sample ID = 5001/5011  Mean = 11.25 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 5.00 
 % Relative Standard Deviation = 40.0 
 Number of Observations = 3 
 Blind Sample ID = 5001/5003  Mean = 2.60 
 % Relative Standard Deviation = 34.4 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 8.46 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 1.95 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 21 
 Blind Sample ID = 33DW/6705  Mean = 4.93 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 14 
 Blind Sample ID = 33DW-67121  Mean = 9.06 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 32.25 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 8 
 Blind Sample ID = 33DIW-67135  Mean = 1.67 
 % Relative Standard Deviation = 34.6 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 17.58 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 19 
 Blind Sample ID = 33127-67133  Mean = 6.85 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 20 
 Blind Sample ID = 33127-67123  Mean = 4.33 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 1.06 
 % Relative Standard Deviation = 22.9 
 Number of Observations = 17 
 Blind Sample ID = 3305/67DW  Mean = 15.73 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7511  Mean = 10.46 
 % Relative Standard Deviation = 22.6 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7507  Mean = 1.67 
 % Relative Standard Deviation = 34.6 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7503  Mean = 3.07 
 % Relative Standard Deviation = 19.1 
 Number of Observations = 44 
 Blind Sample ID = 25DW-75113  Mean = 2.43 
 % Relative Standard Deviation = 21.1 
 Number of Observations = 14 
 Blind Sample ID = 25DW-75105  Mean = 17.74 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 15 
 Blind Sample ID = 25DIW-75159  Mean = 11.67 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 11.39 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 19 
 Blind Sample ID = 25DIW-75147  Mean = 13.96 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 15 
 Blind Sample ID = 25DIW-75143  Mean = 36.57 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 4.91 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 11 
 Blind Sample ID = 25DIW-75131  Mean = 6.31 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 55 
 Blind Sample ID = 25DIW-75127  Mean = 13.52 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 6 
 Blind Sample ID = 25159-75155  Mean = 19.16 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 7.00 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 14.01 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 8 
 Blind Sample ID = 25155-75147  Mean = 14.63 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 10.66 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 14 
 Blind Sample ID = 25147-75145  Mean = 13.21 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 7.81 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 6.94 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 13 
 Blind Sample ID = 25139-75137  Mean = 38.96 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 14 
 Blind Sample ID = 25137-75135  Mean = 11.86 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 8.20 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 40 
 Blind Sample ID = 25125-75127  Mean = 5.05 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 20 
 Blind Sample ID = 25125-75113  Mean = 7.75 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Chromium, FIL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: AA011
Dates: 10/14/86 through 11/16/87
Open Data Set

 Mean = 12.67 
 % Relative Standard Deviation = 46.9 
 Number of Observations = 15 
 Blind Sample ID = ST95  Mean = 13.08 
 % Relative Standard Deviation = 57.4 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 20.00 
 % Relative Standard Deviation = 50.0 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6797  Mean = 11.11 
 % Relative Standard Deviation = 34.4 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 15.00 
 % Relative Standard Deviation = 38.5 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6787  Mean = 13.33 
 % Relative Standard Deviation = 53.0 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 15.00 
 % Relative Standard Deviation = 35.1 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575
The SGPlot Procedure



- Chromium, FIL, DCP -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: DCP04
Dates: 12/01/87 through 12/23/93
Open Data Set

 Mean = 16.33 
 % Relative Standard Deviation = 41.1 
 Number of Observations = 6 
 Blind Sample ID = ST99  Mean = 24.93 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 27 
 Blind Sample ID = ST97  Mean = 1.17 
 % Relative Standard Deviation = 32.9 
 Number of Observations = 18 
 Blind Sample ID = 67DW-33113  Mean = 5.13 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50123  Mean = 7.25 
 % Relative Standard Deviation = 31.9 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50121  Mean = 17.24 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 29 
 Blind Sample ID = 50DW-50115  Mean = 12.22 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 9 
 Blind Sample ID = 5097/50DW  Mean = 20.00 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 17.07 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 15 
 Blind Sample ID = 50121-50105  Mean = 20.63 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 12.36 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 11 
 Blind Sample ID = 5011/50DW  Mean = 19.54 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 13 
 Blind Sample ID = 5011/5007  Mean = 6.42 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 31 
 Blind Sample ID = 5007/50DW  Mean = 9.56 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 41 
 Blind Sample ID = 5007/5003  Mean = 3.67 
 % Relative Standard Deviation = 78.7 
 Number of Observations = 3 
 Blind Sample ID = 5003/50DW  Mean = 12.00 
 % Relative Standard Deviation = 61.2 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 12.00 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 12 
 Blind Sample ID = 5003/5001  Mean = 9.20 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 10 
 Blind Sample ID = 33DW/6799  Mean = 16.17 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 18 
 Blind Sample ID = 33DW/6797  Mean = 7.00 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6793  Mean = 16.60 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  Mean = 13.08 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 7.96 
 % Relative Standard Deviation = 26.9 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6707  Mean = 13.05 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6705  Mean = 3.40 
 % Relative Standard Deviation = 19.5 
 Number of Observations = 42 
 Blind Sample ID = 33DW/6703  Mean = 6.86 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 7 
 Blind Sample ID = 33DW-67123  Mean = 10.45 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 20 
 Blind Sample ID = 33DW-67121  Mean = 22.63 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 16 
 Blind Sample ID = 33DW-67115  Mean = 13.14 
 % Relative Standard Deviation = 16.4 
 Number of Observations = 29 
 Blind Sample ID = 33DW-67105  Mean = 3.23 
 % Relative Standard Deviation = 27.8 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67103  Mean = 4.14 
 % Relative Standard Deviation = 35.3 
 Number of Observations = 7 
 Blind Sample ID = 3399/67DW  Mean = 5.83 
 % Relative Standard Deviation = 24.1 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 6.50 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 18 
 Blind Sample ID = 3305/67DW  Mean = 10.80 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7599  Mean = 18.64 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 16.67 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 15 
 Blind Sample ID = 25DW/7511  Mean = 9.92 
 % Relative Standard Deviation = 29.5 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7507  Mean = 4.47 
 % Relative Standard Deviation = 17.9 
 Number of Observations = 43 
 Blind Sample ID = 25DW/7503  Mean = 11.75 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 8 
 Blind Sample ID = 25DW-75121  Mean = 1.75 
 % Relative Standard Deviation = 54.7 
 Number of Observations = 4 
 Blind Sample ID = 25DW-75113  Mean = 14.97 
 % Relative Standard Deviation = 26.1 
 Number of Observations = 30 
 Blind Sample ID = 25DW-75105  Mean = 3.15 
 % Relative Standard Deviation = 34.4 
 Number of Observations = 26 
 Blind Sample ID = 25DW-75103  Mean = 17.13 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 1.20 
 % Relative Standard Deviation = 37.3 
 Number of Observations = 5 
 Blind Sample ID = 25125-75113  Mean = 3.33 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504  Mean = 21.53 
 % Relative Standard Deviation = 15.5 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 18.13 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 16 
 Blind Sample ID = 2505/7501  Mean = 19.19 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Chromium, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: GF075
Dates: 12/28/93 through 09/27/01
Open Data Set

 Mean = 1.96 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 24 
 Blind Sample ID = GT3  Mean = 2.44 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 21 
 Blind Sample ID = 75DIW-25155  Mean = 7.96 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25151  Mean = 1.96 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 4.86 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 10 
 Blind Sample ID = 75DIW-25137  Mean = 5.57 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 24 
 Blind Sample ID = 50DW-50123  Mean = 7.83 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 20 
 Blind Sample ID = 50DIW-50145  Mean = 18.73 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 3.86 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 10.17 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50137  Mean = 39.40 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 19.04 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50133  Mean = 5.66 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50123  Mean = 16.30 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 32 
 Blind Sample ID = 50157-50DIW  Mean = 4.19 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 32.84 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 12 
 Blind Sample ID = 50143-50151  Mean = 11.86 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 33 
 Blind Sample ID = 50139-50141  Mean = 43.11 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 20 
 Blind Sample ID = 50135-50139  Mean = 14.43 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 7 
 Blind Sample ID = 50123-50121  Mean = 7.71 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 21 
 Blind Sample ID = 33DW-67123  Mean = 11.24 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 25 
 Blind Sample ID = 33DW-67121  Mean = 51.66 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 29 
 Blind Sample ID = 33DIW-67135  Mean = 12.58 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 36 
 Blind Sample ID = 33DIW-67131  Mean = 8.08 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 45 
 Blind Sample ID = 33DIW-67127  Mean = 27.74 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 19 
 Blind Sample ID = 33127-67133  Mean = 11.95 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 20 
 Blind Sample ID = 33127-67123  Mean = 12.60 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 25 
 Blind Sample ID = 25DW-75121  Mean = 22.04 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75159  Mean = 11.91 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 10.34 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 15 
 Blind Sample ID = 25DIW-75147  Mean = 27.69 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 56.84 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 13.83 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 9.18 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 39 
 Blind Sample ID = 25DIW-75127  Mean = 13.70 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 29.15 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 31 
 Blind Sample ID = 25157-75159  Mean = 26.87 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 14.09 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 11 
 Blind Sample ID = 25155-75153  Mean = 12.83 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 8 
 Blind Sample ID = 25155-75147  Mean = 15.11 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 21 
 Blind Sample ID = 25151-75155  Mean = 14.90 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 13.69 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 19 
 Blind Sample ID = 25145-75147  Mean = 18.07 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 6 
 Blind Sample ID = 25139-75137  Mean = 62.42 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 14 
 Blind Sample ID = 25137-75135  Mean = 18.14 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 10.39 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 40 
 Blind Sample ID = 25125-75127  Mean = 1.89 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 15 
 Blind Sample ID = 25125-75113  Mean = 12.08 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Chromium, FIL, GFAA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: GF076
Dates: 11/30/87 through 09/27/94
Open Data Set

 Mean = 3.63 
 % Relative Standard Deviation = 30.3 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25117  Mean = 1.69 
 % Relative Standard Deviation = 49.8 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25103  Mean = 1.39 
 % Relative Standard Deviation = 146.8 
 Number of Observations = 8 
 Blind Sample ID = 67DW-33113  Mean = 6.08 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50117  Mean = 2.74 
 % Relative Standard Deviation = 27.1 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50103  Mean = 6.39 
 % Relative Standard Deviation = 38.0 
 Number of Observations = 16 
 Blind Sample ID = 5001/50DW  Mean = 15.00 
 % Relative Standard Deviation = 64.8 
 Number of Observations = 7 
 Blind Sample ID = 33DW-67121  Mean = 7.48 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 4 
 Blind Sample ID = 25DW/7507  Mean = 11.90 
 % Relative Standard Deviation = 25.4 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7505  Mean = 12.91 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 11 
 Blind Sample ID = 25DW-75121  Mean = 2.86 
 % Relative Standard Deviation = 41.0 
 Number of Observations = 8 
 Blind Sample ID = 25DW-75103  Mean = 3.32 
 % Relative Standard Deviation = 49.6 
 Number of Observations = 6 
 Blind Sample ID = 2501/75DW
The SGPlot Procedure



- Chromium, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: PLM40
Dates: 02/07/94 through 05/09/00
Open Data Set

 Mean = 1.72 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 8 
 Blind Sample ID = GT3  Mean = 2.17 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 3 
 Blind Sample ID = 75DIW-25155  Mean = 1.92 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 4.81 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 32 
 Blind Sample ID = 75DIW-25137  Mean = 7.44 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50145  Mean = 18.27 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 38.95 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 33.56 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 17 
 Blind Sample ID = 50143-50151  Mean = 25.07 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 48.04 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 19.73 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 6.87 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 31 
 Blind Sample ID = 50125-50123  Mean = 14.43 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 6 
 Blind Sample ID = 25151-75155  Mean = 12.81 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 14 
 Blind Sample ID = 25145-75147  Mean = 9.15 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 1.69 
 % Relative Standard Deviation = 28.4 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Chromium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: PLA11
Dates: 08/10/87 through 09/27/01
Open Data Set

 Mean = 25.50 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 36 
 Blind Sample ID = ST97  Mean = 27.92 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 11.20 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 10.00 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  Mean = 18.35 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 31 
 Blind Sample ID = 5097/5099  Mean = 19.72 
 % Relative Standard Deviation = 17.4 
 Number of Observations = 25 
 Blind Sample ID = 5097/5001  Mean = 15.97 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 12 
 Blind Sample ID = 50157-50DIW  Mean = 7.75 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 6 
 Blind Sample ID = 50155-50DIW  Mean = 33.14 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 22 
 Blind Sample ID = 50143-50151  Mean = 27.71 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 22 
 Blind Sample ID = 50143-50145  Mean = 14.57 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 12 
 Blind Sample ID = 50139-50145  Mean = 18.00 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 50.09 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 11.48 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 42.00 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 12.38 
 % Relative Standard Deviation = 14.5 
 Number of Observations = 24 
 Blind Sample ID = 50123-50121  Mean = 9.46 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 17.80 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 44 
 Blind Sample ID = 50121-50105  Mean = 20.11 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 47 
 Blind Sample ID = 50115-50103  Mean = 19.63 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 14.90 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 10.80 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 9.28 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 14.83 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 60 
 Blind Sample ID = 5007/5001  Mean = 14.63 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 19 
 Blind Sample ID = 5003/5097  Mean = 12.19 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 8.75 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6707  Mean = 10.67 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 9 
 Blind Sample ID = 25DW/7507  Mean = 11.52 
 % Relative Standard Deviation = 14.1 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75121  Mean = 22.91 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 33 
 Blind Sample ID = 25DIW-75151  Mean = 60.53 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 17 
 Blind Sample ID = 25DIW-75135  Mean = 13.61 
 % Relative Standard Deviation = 14.1 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 29.54 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 14.47 
 % Relative Standard Deviation = 23.0 
 Number of Observations = 12 
 Blind Sample ID = 25155-75153  Mean = 12.33 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 12 
 Blind Sample ID = 25155-75147  Mean = 14.28 
 % Relative Standard Deviation = 16.7 
 Number of Observations = 26 
 Blind Sample ID = 25147-75145  Mean = 10.90 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 17.83 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 24 
 Blind Sample ID = 25139-75137  Mean = 18.44 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 16 
 Blind Sample ID = 25133-75127  Mean = 6.26 
 % Relative Standard Deviation = 21.8 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 9.29 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 41 
 Blind Sample ID = 25125-75127  Mean = 11.29 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 5.13 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 40 
 Blind Sample ID = 25117-75113  Mean = 5.31 
 % Relative Standard Deviation = 16.8 
 Number of Observations = 39 
 Blind Sample ID = 25101-75113  Mean = 17.29 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 7 
 Blind Sample ID = 2505/7501  Mean = 14.28 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 18.45 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 18.23 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 14.80 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Chromium, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01034, MCode: AA048
Dates: 10/14/86 through 03/08/88
Open Data Set

 Mean = 17.50 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 33.33 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 3 
 Blind Sample ID = STS1  Mean = 12.50 
 % Relative Standard Deviation = 40.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 12.22 
 % Relative Standard Deviation = 36.1 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785
The SGPlot Procedure



- Chromium, UNF, DCP -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01034, MCode: DCP07
Dates: 11/18/87 through 12/13/93
Open Data Set

 Mean = 13.92 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 13 
 Blind Sample ID = ST99  Mean = 9.88 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 16 
 Blind Sample ID = ST93  Mean = 1.11 
 % Relative Standard Deviation = 29.1 
 Number of Observations = 18 
 Blind Sample ID = 67DW-33113  Mean = 7.63 
 % Relative Standard Deviation = 25.9 
 Number of Observations = 19 
 Blind Sample ID = 50DW/5001  Mean = 4.25 
 % Relative Standard Deviation = 49.3 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50117  Mean = 7.11 
 % Relative Standard Deviation = 28.5 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 22.00 
 % Relative Standard Deviation = 17.0 
 Number of Observations = 4 
 Blind Sample ID = 5097/5099  Mean = 5.00 
 % Relative Standard Deviation = 69.3 
 Number of Observations = 3 
 Blind Sample ID = 50125-50123  Mean = 17.80 
 % Relative Standard Deviation = 17.8 
 Number of Observations = 15 
 Blind Sample ID = 50121-50105  Mean = 12.40 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 19.56 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 19.92 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 13 
 Blind Sample ID = 5011/5007  Mean = 25.82 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 9.50 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 14 
 Blind Sample ID = 5007/5003  Mean = 14.00 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 21.22 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 9 
 Blind Sample ID = 5001/5011  Mean = 14.75 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 11.20 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 10 
 Blind Sample ID = 5001/5003  Mean = 10.20 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 4.57 
 % Relative Standard Deviation = 60.4 
 Number of Observations = 7 
 Blind Sample ID = 33DW/6793  Mean = 14.38 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 11.95 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 19 
 Blind Sample ID = 33DW/6705  Mean = 10.62 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 13 
 Blind Sample ID = 33DW-67121  Mean = 22.06 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 5.00 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 7 
 Blind Sample ID = 3399/67DW  Mean = 6.83 
 % Relative Standard Deviation = 20.5 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 5.63 
 % Relative Standard Deviation = 17.0 
 Number of Observations = 16 
 Blind Sample ID = 3305/67DW  Mean = 19.09 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7511  Mean = 10.46 
 % Relative Standard Deviation = 28.6 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7507  Mean = 3.50 
 % Relative Standard Deviation = 40.4 
 Number of Observations = 8 
 Blind Sample ID = 25DW/7503  Mean = 1.07 
 % Relative Standard Deviation = 24.2 
 Number of Observations = 15 
 Blind Sample ID = 25DW-75113  Mean = 14.33 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 12 
 Blind Sample ID = 25DW-75105
The SGPlot Procedure



- Chromium, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01034, MCode: GF094
Dates: 12/28/93 through 09/24/01
Open Data Set

 Mean = 2.09 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 4 
 Blind Sample ID = 75DIW-25155  Mean = 7.39 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25151  Mean = 1.10 
 % Relative Standard Deviation = 22.3 
 Number of Observations = 6 
 Blind Sample ID = 67DW-33113  Mean = 2.17 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 10 
 Blind Sample ID = 50DW-50125  Mean = 7.34 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 7 
 Blind Sample ID = 50DIW-50145  Mean = 18.20 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 3.56 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 9.61 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50137  Mean = 39.43 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 14.78 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 3.92 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 25.50 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 8 
 Blind Sample ID = 50143-50145  Mean = 11.33 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 17.26 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 48.54 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 20.77 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 13 
 Blind Sample ID = 50125-50133  Mean = 7.64 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 25 
 Blind Sample ID = 50125-50123  Mean = 14.29 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 7 
 Blind Sample ID = 50123-50121  Mean = 7.45 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 6 
 Blind Sample ID = 33DW-67123  Mean = 51.50 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 8 
 Blind Sample ID = 33DIW-67135  Mean = 12.25 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 18.51 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75159  Mean = 11.61 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 10.21 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 11 
 Blind Sample ID = 25DIW-75147  Mean = 26.58 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 58.44 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 13.45 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 11 
 Blind Sample ID = 25DIW-75131  Mean = 8.55 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75127  Mean = 13.14 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 27.88 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 24.93 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 11.85 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147  Mean = 13.94 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 13.88 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 12.63 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 9.52 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 16.06 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137  Mean = 17.57 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 11.63 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Cobalt, FIL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01035, MCode: CX005
Dates: 11/12/86 through 05/08/89
Open Data Set

 Mean = 2.63 
 % Relative Standard Deviation = 49.6 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 3.60 
 % Relative Standard Deviation = 42.1 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 3.13 
 % Relative Standard Deviation = 39.9 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 2.00 
 % Relative Standard Deviation = 50.0 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 1.67 
 % Relative Standard Deviation = 34.6 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW
The SGPlot Procedure



- Cobalt, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01035, MCode: GF087
Dates: 05/16/89 through 07/13/01
Open Data Set

 Mean = 3.85 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 39 
 Blind Sample ID = 67DW-33113  Mean = 8.82 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 6 
 Blind Sample ID = 50DIW-50143  Mean = 3.70 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 21.51 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 5.25 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 12.38 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 9.69 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 9.40 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 15 
 Blind Sample ID = 5011/5007  Mean = 6.95 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 41 
 Blind Sample ID = 5007/5003  Mean = 3.00 
 % Relative Standard Deviation = 47.1 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 6.33 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 12 
 Blind Sample ID = 5003/5001  Mean = 14.54 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 11.65 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 23 
 Blind Sample ID = 33DW/6705  Mean = 3.75 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 3.29 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 14 
 Blind Sample ID = 33DW-67121  Mean = 9.59 
 % Relative Standard Deviation = 30.9 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 27.25 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 8 
 Blind Sample ID = 33DIW-67135  Mean = 17.17 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 7.33 
 % Relative Standard Deviation = 31.0 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 6.00 
 % Relative Standard Deviation = 23.0 
 Number of Observations = 21 
 Blind Sample ID = 3305/67DW  Mean = 31.52 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 18.58 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 14.29 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 10.33 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 15.69 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Cobalt, FIL, GFAA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01035, MCode: AA015
Dates: 03/06/87 through 09/30/92
Open Data Set

 Mean = 1.34 
 % Relative Standard Deviation = 65.9 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25103  Mean = 1.85 
 % Relative Standard Deviation = 22.4 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50103  Mean = 2.47 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 3 
 Blind Sample ID = 5097/50DW  Mean = 4.52 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 21 
 Blind Sample ID = 5001/50DW  Mean = 1.03 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7599  Mean = 2.63 
 % Relative Standard Deviation = 71.8 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7593  Mean = 1.23 
 % Relative Standard Deviation = 39.6 
 Number of Observations = 4 
 Blind Sample ID = 25DW/7585  Mean = 7.83 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 4 
 Blind Sample ID = 25DW/7507  Mean = 13.40 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7505  Mean = 3.26 
 % Relative Standard Deviation = 33.5 
 Number of Observations = 8 
 Blind Sample ID = 25DW-75103  Mean = 0.83 
 % Relative Standard Deviation = 42.1 
 Number of Observations = 3 
 Blind Sample ID = 2599/75DW  Mean = 2.28 
 % Relative Standard Deviation = 19.7 
 Number of Observations = 12 
 Blind Sample ID = 2501/75DW
The SGPlot Procedure



- Cobalt, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01035, MCode: PLM43
Dates: 02/07/94 through 09/27/01
Open Data Set

 Mean = 0.89 
 % Relative Standard Deviation = 35.0 
 Number of Observations = 8 
 Blind Sample ID = GT3  Mean = 6.85 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25155  Mean = 1.88 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 2.31 
 % Relative Standard Deviation = 20.7 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25125  Mean = 5.19 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 8.54 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 20.33 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 2.09 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 13.08 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 8.59 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 28 
 Blind Sample ID = 50143-50151  Mean = 13.33 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 20.30 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 14.80 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 7.23 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 31 
 Blind Sample ID = 50125-50123  Mean = 11.18 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 6.88 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 20.35 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 2.69 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 10.80 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 10.06 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Cobalt, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01035, MCode: PLA11
Dates: 10/14/86 through 09/27/01
Open Data Set

 Mean = 5.32 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 4.63 
 % Relative Standard Deviation = 30.4 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 3.54 
 % Relative Standard Deviation = 29.7 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 5.57 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 10.11 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 9 
 Blind Sample ID = ST81  Mean = 3.71 
 % Relative Standard Deviation = 24.8 
 Number of Observations = 17 
 Blind Sample ID = 67DW-33113  Mean = 3.32 
 % Relative Standard Deviation = 16.8 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 3.46 
 % Relative Standard Deviation = 19.1 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  Mean = 3.32 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 31 
 Blind Sample ID = 5097/5099  Mean = 7.24 
 % Relative Standard Deviation = 18.0 
 Number of Observations = 25 
 Blind Sample ID = 5097/5001  Mean = 3.05 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 41 
 Blind Sample ID = 5093/5087  Mean = 12.40 
 % Relative Standard Deviation = 16.5 
 Number of Observations = 13 
 Blind Sample ID = 50155-50DIW  Mean = 9.02 
 % Relative Standard Deviation = 40.2 
 Number of Observations = 13 
 Blind Sample ID = 50143-50151  Mean = 14.64 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 22 
 Blind Sample ID = 50143-50145  Mean = 9.49 
 % Relative Standard Deviation = 38.5 
 Number of Observations = 6 
 Blind Sample ID = 50139-50145  Mean = 4.01 
 % Relative Standard Deviation = 27.7 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 20.19 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 16.67 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 25.44 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 4.75 
 % Relative Standard Deviation = 32.4 
 Number of Observations = 24 
 Blind Sample ID = 50123-50121  Mean = 6.63 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 11.39 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 44 
 Blind Sample ID = 50121-50105  Mean = 8.98 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 47 
 Blind Sample ID = 50115-50103  Mean = 9.41 
 % Relative Standard Deviation = 16.4 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 11.15 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 6.28 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 7.08 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 10.61 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 61 
 Blind Sample ID = 5007/5001  Mean = 4.21 
 % Relative Standard Deviation = 24.5 
 Number of Observations = 19 
 Blind Sample ID = 5003/5097  Mean = 6.75 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 3.50 
 % Relative Standard Deviation = 16.7 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6797  Mean = 3.40 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 6.40 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  Mean = 7.70 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 3.08 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6703  Mean = 3.96 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 6.43 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7511  Mean = 9.25 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 3.16 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 5.57 
 % Relative Standard Deviation = 27.0 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75121  Mean = 31.47 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 17 
 Blind Sample ID = 25DIW-75135  Mean = 18.44 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 7.44 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 12.49 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 9.45 
 % Relative Standard Deviation = 29.0 
 Number of Observations = 7 
 Blind Sample ID = 25155-75153  Mean = 7.96 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 7 
 Blind Sample ID = 25155-75147  Mean = 7.98 
 % Relative Standard Deviation = 25.2 
 Number of Observations = 22 
 Blind Sample ID = 25147-75145  Mean = 6.08 
 % Relative Standard Deviation = 26.9 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 14.44 
 % Relative Standard Deviation = 18.1 
 Number of Observations = 16 
 Blind Sample ID = 25133-75127  Mean = 11.05 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 10.68 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 41 
 Blind Sample ID = 25125-75127  Mean = 11.09 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 46 
 Blind Sample ID = 25125-75113  Mean = 10.00 
 % Relative Standard Deviation = 22.7 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 9.33 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 40 
 Blind Sample ID = 25117-75113  Mean = 10.82 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 39 
 Blind Sample ID = 25101-75113  Mean = 12.73 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 12.52 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501  Mean = 3.94 
 % Relative Standard Deviation = 34.2 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 19.81 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 16.46 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 15.20 
 % Relative Standard Deviation = 38.8 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Cobalt, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01037, MCode: CX015
Dates: 10/14/86 through 04/27/89
Open Data Set

 Mean = 15.13 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 13.25 
 % Relative Standard Deviation = 57.9 
 Number of Observations = 4 
 Blind Sample ID = STS1  Mean = 2.14 
 % Relative Standard Deviation = 63.0 
 Number of Observations = 14 
 Blind Sample ID = ST99  Mean = 4.94 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 5.75 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5001  Mean = 3.60 
 % Relative Standard Deviation = 46.5 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 5.57 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 7 
 Blind Sample ID = 5001/5003  Mean = 2.75 
 % Relative Standard Deviation = 50.5 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 1.89 
 % Relative Standard Deviation = 55.8 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 1.50 
 % Relative Standard Deviation = 38.5 
 Number of Observations = 4 
 Blind Sample ID = 3399/67DW  Mean = 3.60 
 % Relative Standard Deviation = 46.5 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7503
The SGPlot Procedure



- Cobalt, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01037, MCode: GF098
Dates: 05/08/89 through 09/14/01
Open Data Set

 Mean = 6.85 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 4 
 Blind Sample ID = 75DIW-25155  Mean = 5.20 
 % Relative Standard Deviation = 18.1 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  Mean = 5.00 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 2.50 
 % Relative Standard Deviation = 20.9 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50117  Mean = 5.22 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 5.21 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 1.72 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 12.42 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 13.89 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 50143-50145  Mean = 8.63 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 3.77 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 20.23 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 15.31 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 13 
 Blind Sample ID = 50125-50133  Mean = 7.82 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 28 
 Blind Sample ID = 50125-50123  Mean = 4.50 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 12.55 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 6.79 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 14 
 Blind Sample ID = 5007/5003  Mean = 3.75 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 9.30 
 % Relative Standard Deviation = 21.5 
 Number of Observations = 10 
 Blind Sample ID = 5001/5011  Mean = 6.33 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 3 
 Blind Sample ID = 5001/5003  Mean = 1.40 
 % Relative Standard Deviation = 39.1 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 14.20 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6709  Mean = 11.33 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 21 
 Blind Sample ID = 33DW/6705  Mean = 6.06 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 17 
 Blind Sample ID = 3305/67DW  Mean = 5.91 
 % Relative Standard Deviation = 30.7 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7511  Mean = 7.67 
 % Relative Standard Deviation = 25.7 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 2.67 
 % Relative Standard Deviation = 21.7 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7503  Mean = 7.88 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 24 
 Blind Sample ID = 25DW-75113  Mean = 14.64 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 14 
 Blind Sample ID = 25DW-75105  Mean = 8.75 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75127  Mean = 11.07 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 6.85 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147  Mean = 7.67 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 6.91 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 2.18 
 % Relative Standard Deviation = 22.2 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137
The SGPlot Procedure



- Copper, FIL, AA -
Percent Relative Standard Deviation
Lab: , PCode: 01040, MCode: AA016
Dates: 10/14/86 through 11/05/86
Open Data Set

The SGPlot Procedure



- Copper, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: CX006
Dates: 10/15/86 through 05/08/89
Open Data Set

 Mean = 27.88 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 16.45 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 11 
 Blind Sample ID = ST97  Mean = 9.09 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 11 
 Blind Sample ID = 5097/50DW  Mean = 24.80 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 7.75 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 43.47 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 17 
 Blind Sample ID = 5003/50DW  Mean = 17.33 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 6 
 Blind Sample ID = 33DW/6799  Mean = 10.64 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 14 
 Blind Sample ID = 33DW/6797  Mean = 24.50 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 38.33 
 % Relative Standard Deviation = 20.5 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 10.00 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 20.43 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7599  Mean = 14.15 
 % Relative Standard Deviation = 16.7 
 Number of Observations = 20 
 Blind Sample ID = 25DW/7597  Mean = 82.50 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 6 
 Blind Sample ID = 25DW/7575
The SGPlot Procedure



- Copper, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: GF088
Dates: 05/15/89 through 09/24/01
Open Data Set

 Mean = 9.83 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25155  Mean = 8.56 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25151  Mean = 3.30 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 22 
 Blind Sample ID = 75DIW-25139  Mean = 15.44 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 39 
 Blind Sample ID = 67DW-33113  Mean = 5.25 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50123  Mean = 2.66 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50121  Mean = 8.71 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 31 
 Blind Sample ID = 50DW-50115  Mean = 5.89 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 11.91 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 6.62 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 1.04 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50137  Mean = 31.03 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 44.00 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50133  Mean = 5.42 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50123  Mean = 12.60 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 8 
 Blind Sample ID = 50157-50DIW  Mean = 15.54 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 26 
 Blind Sample ID = 50139-50141  Mean = 8.44 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 8 
 Blind Sample ID = 50137-50139  Mean = 38.46 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 23 
 Blind Sample ID = 50135-50139  Mean = 7.63 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 12.00 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 50.00 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 4.93 
 % Relative Standard Deviation = 25.9 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 19.87 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 15 
 Blind Sample ID = 5011/5007  Mean = 14.26 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 31 
 Blind Sample ID = 5007/50DW  Mean = 56.80 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 41 
 Blind Sample ID = 5007/5003  Mean = 45.14 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 14 
 Blind Sample ID = 5003/50DW  Mean = 47.00 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 3 
 Blind Sample ID = 5003/5097  Mean = 69.50 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 12 
 Blind Sample ID = 5003/5001  Mean = 16.00 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6799  Mean = 9.50 
 % Relative Standard Deviation = 30.6 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6797  Mean = 13.54 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 20.20 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 15 
 Blind Sample ID = 33DW/6707  Mean = 12.09 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6705  Mean = 61.19 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 16 
 Blind Sample ID = 33DW/6703  Mean = 8.00 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 3.87 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 46 
 Blind Sample ID = 33DW-67121  Mean = 10.65 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 12.80 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67105  Mean = 56.77 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67103  Mean = 42.17 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 29 
 Blind Sample ID = 33DIW-67135  Mean = 13.39 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 36 
 Blind Sample ID = 33DIW-67131  Mean = 28.27 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 45 
 Blind Sample ID = 33DIW-67127  Mean = 7.00 
 % Relative Standard Deviation = 79.5 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 7.08 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 6.84 
 % Relative Standard Deviation = 29.3 
 Number of Observations = 19 
 Blind Sample ID = 3305/67DW  Mean = 11.33 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 9 
 Blind Sample ID = 25DW/7597  Mean = 22.86 
 % Relative Standard Deviation = 24.4 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7507  Mean = 61.71 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 24 
 Blind Sample ID = 25DW/7503  Mean = 5.06 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 33 
 Blind Sample ID = 25DW-75121  Mean = 15.19 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 31 
 Blind Sample ID = 25DW-75105  Mean = 63.19 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75103  Mean = 25.41 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75159  Mean = 18.86 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 9.10 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75147  Mean = 17.63 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 48.16 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 15.00 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 37.46 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 31.71 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 8 
 Blind Sample ID = 25157-75159  Mean = 29.27 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 19.30 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 8 
 Blind Sample ID = 25155-75147  Mean = 36.63 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 7 
 Blind Sample ID = 25151-75155  Mean = 11.90 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 12.12 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 4.88 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137  Mean = 51.57 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 35.50 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 57.67 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504  Mean = 30.44 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505  Mean = 18.67 
 % Relative Standard Deviation = 34.0 
 Number of Observations = 3 
 Blind Sample ID =
The SGPlot Procedure



- Copper, FIL, GFAA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: GF077
Dates: 03/06/87 through 09/27/94
Open Data Set

 Mean = 2.18 
 % Relative Standard Deviation = 28.3 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25117  Mean = 23.17 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 6 
 Blind Sample ID = 75DW-25103  Mean = 17.13 
 % Relative Standard Deviation = 21.9 
 Number of Observations = 8 
 Blind Sample ID = 67DW-33113  Mean = 3.54 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50117  Mean = 44.00 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50103  Mean = 8.93 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 3 
 Blind Sample ID = 5097/50DW  Mean = 25.32 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 19 
 Blind Sample ID = 5001/50DW  Mean = 4.23 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 7 
 Blind Sample ID = 33DW-67121  Mean = 26.33 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7593  Mean = 39.50 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 4 
 Blind Sample ID = 25DW/7585  Mean = 22.00 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7507  Mean = 15.20 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7505  Mean = 5.33 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 11 
 Blind Sample ID = 25DW-75121  Mean = 63.50 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 8 
 Blind Sample ID = 25DW-75103  Mean = 6.80 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 3 
 Blind Sample ID = 2599/75DW  Mean = 12.83 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 12 
 Blind Sample ID = 2501/75DW
The SGPlot Procedure



- Copper, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: PLM43
Dates: 02/07/94 through 09/27/01
Open Data Set

 Mean = 4.24 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 34 
 Blind Sample ID = GT3  Mean = 9.59 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25155  Mean = 3.42 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 4.50 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25125  Mean = 5.79 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 11.43 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 31.45 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 12.72 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 18.44 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 27.45 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 28 
 Blind Sample ID = 50143-50151  Mean = 16.49 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 32.46 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 51.27 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 13.58 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 31 
 Blind Sample ID = 50125-50123  Mean = 31.08 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 27.12 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 36.10 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 11.68 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 35.20 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 36.50 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Copper, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: PLA11
Dates: 10/14/86 through 09/27/01
Open Data Set

 Mean = 19.81 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 54 
 Blind Sample ID = ST97  Mean = 10.59 
 % Relative Standard Deviation = 22.9 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 50.77 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 48.57 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 18.24 
 % Relative Standard Deviation = 21.5 
 Number of Observations = 17 
 Blind Sample ID = 67DW-33113  Mean = 33.08 
 % Relative Standard Deviation = 14.5 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  Mean = 32.50 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 24 
 Blind Sample ID = 5097/5001  Mean = 19.02 
 % Relative Standard Deviation = 15.8 
 Number of Observations = 41 
 Blind Sample ID = 5093/5087  Mean = 12.71 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 12 
 Blind Sample ID = 50157-50DIW  Mean = 18.88 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 13 
 Blind Sample ID = 50155-50DIW  Mean = 27.66 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 22 
 Blind Sample ID = 50143-50151  Mean = 16.75 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 22 
 Blind Sample ID = 50143-50145  Mean = 12.56 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 26 
 Blind Sample ID = 50139-50145  Mean = 10.23 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 31.23 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 10.23 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 44 
 Blind Sample ID = 50121-50105  Mean = 50.21 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 47 
 Blind Sample ID = 50115-50103  Mean = 20.20 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 10.63 
 % Relative Standard Deviation = 23.0 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 68.26 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 40.00 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 60 
 Blind Sample ID = 5007/5001  Mean = 50.56 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 18 
 Blind Sample ID = 5003/5097  Mean = 69.17 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 20.89 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 59.62 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6703  Mean = 20.91 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7507  Mean = 66.84 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 25.48 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 33 
 Blind Sample ID = 25DIW-75151  Mean = 47.06 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 17 
 Blind Sample ID = 25DIW-75135  Mean = 17.78 
 % Relative Standard Deviation = 24.1 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 43.75 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 32.33 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 27.65 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 12 
 Blind Sample ID = 25155-75153  Mean = 18.24 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 12 
 Blind Sample ID = 25155-75147  Mean = 11.25 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 26 
 Blind Sample ID = 25147-75145  Mean = 13.22 
 % Relative Standard Deviation = 28.1 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 54.38 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 16 
 Blind Sample ID = 25133-75127  Mean = 24.05 
 % Relative Standard Deviation = 20.7 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 36.59 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 41 
 Blind Sample ID = 25125-75127  Mean = 33.75 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 37.50 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 40 
 Blind Sample ID = 25117-75113  Mean = 49.74 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 39 
 Blind Sample ID = 25101-75113  Mean = 48.00 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 43.91 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501  Mean = 36.43 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 42 
 Blind Sample ID = 2501/7509  Mean = 14.00 
 % Relative Standard Deviation = 39.1 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Copper, UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01042, MCode: CX016
Dates: 10/14/86 through 04/27/89
Open Data Set

 Mean = 18.00 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 27.29 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 14 
 Blind Sample ID = ST99  Mean = 32.72 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 29.00 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5001  Mean = 26.00 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 10.00 
 % Relative Standard Deviation = 14.1 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 24.38 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 40.00 
 % Relative Standard Deviation = 17.0 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 13.67 
 % Relative Standard Deviation = 33.8 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 65.67 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7503
The SGPlot Procedure



- Copper, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01042, MCode: GF099
Dates: 05/08/89 through 09/28/01
Open Data Set

 Mean = 9.55 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 10 
 Blind Sample ID = 75DIW-25155  Mean = 8.45 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25151  Mean = 14.77 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 39 
 Blind Sample ID = 67DW-33113  Mean = 19.20 
 % Relative Standard Deviation = 24.9 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  Mean = 8.75 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 2.92 
 % Relative Standard Deviation = 22.9 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50117  Mean = 19.50 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 6 
 Blind Sample ID = 50DW-50101  Mean = 5.86 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 11 
 Blind Sample ID = 50DIW-50145  Mean = 11.29 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 6.50 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 1.17 
 % Relative Standard Deviation = 16.1 
 Number of Observations = 7 
 Blind Sample ID = 50DIW-50137  Mean = 31.14 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 12.78 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 8 
 Blind Sample ID = 50157-50DIW  Mean = 16.68 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 8 
 Blind Sample ID = 50143-50145  Mean = 11.98 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 14.87 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 18 
 Blind Sample ID = 50139-50141  Mean = 9.44 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 37.90 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 16 
 Blind Sample ID = 50135-50139  Mean = 31.89 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 51.92 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 13 
 Blind Sample ID = 50125-50133  Mean = 13.18 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 28 
 Blind Sample ID = 50125-50123  Mean = 5.86 
 % Relative Standard Deviation = 30.3 
 Number of Observations = 7 
 Blind Sample ID = 50123-50121  Mean = 11.88 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 3.30 
 % Relative Standard Deviation = 28.7 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 50.08 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 12 
 Blind Sample ID = 50115-50103  Mean = 19.43 
 % Relative Standard Deviation = 19.2 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 33.36 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 56.64 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 14 
 Blind Sample ID = 5007/5003  Mean = 50.00 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 27.33 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 9 
 Blind Sample ID = 5001/5011  Mean = 39.00 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 73.33 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 3 
 Blind Sample ID = 5001/5003  Mean = 12.80 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 14.69 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 13.05 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6705  Mean = 7.25 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 28 
 Blind Sample ID = 33DW-67123  Mean = 2.93 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 14 
 Blind Sample ID = 33DW-67121  Mean = 11.07 
 % Relative Standard Deviation = 31.2 
 Number of Observations = 15 
 Blind Sample ID = 33DW-67115  Mean = 43.75 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 8 
 Blind Sample ID = 33DIW-67135  Mean = 13.17 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 7.67 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 70.42 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 19 
 Blind Sample ID = 33127-67133  Mean = 18.53 
 % Relative Standard Deviation = 15.5 
 Number of Observations = 15 
 Blind Sample ID = 33127-67123  Mean = 8.08 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 6.27 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 15 
 Blind Sample ID = 3305/67DW  Mean = 7.91 
 % Relative Standard Deviation = 30.2 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7511  Mean = 17.08 
 % Relative Standard Deviation = 26.2 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 74.00 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7503  Mean = 34.19 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 43 
 Blind Sample ID = 25DW-75113  Mean = 14.45 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 11 
 Blind Sample ID = 25DW-75105  Mean = 24.62 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75159  Mean = 17.97 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 9.05 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75147  Mean = 17.33 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 15 
 Blind Sample ID = 25DIW-75143  Mean = 47.32 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 14.67 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 31.87 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 54 
 Blind Sample ID = 25DIW-75127  Mean = 36.20 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 31.70 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 8 
 Blind Sample ID = 25157-75159  Mean = 27.78 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 18.38 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 7 
 Blind Sample ID = 25155-75147  Mean = 35.25 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 11.65 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 11.84 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 13.74 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 4.29 
 % Relative Standard Deviation = 27.0 
 Number of Observations = 14 
 Blind Sample ID = 25139-75137  Mean = 45.40 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 14 
 Blind Sample ID = 25137-75135  Mean = 52.71 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 35.05 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 39 
 Blind Sample ID = 25125-75127  Mean = 38.20 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 20 
 Blind Sample ID = 25125-75113  Mean = 33.92 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Copper, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01042, MCode: PLA15
Dates: 04/12/99 through 09/14/01
Open Data Set

 Mean = 16.61 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 11.64 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 3 
 Blind Sample ID = 25DIW-75147  Mean = 33.32 
 % Relative Standard Deviation = 26.9 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 9.61 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 3 
 Blind Sample ID = 25147-75145
The SGPlot Procedure



- Iron, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01046, MCode: AA018
Dates: 10/14/86 through 03/29/96
Open Data Set

 Mean = 100.00 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 90.00 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 10 
 Blind Sample ID = 67DW-33113  Mean = 29.06 
 % Relative Standard Deviation = 28.1 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50123  Mean = 72.19 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50121  Mean = 578.71 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 31 
 Blind Sample ID = 50DW-50115  Mean = 20.83 
 % Relative Standard Deviation = 43.2 
 Number of Observations = 12 
 Blind Sample ID = 50DIW-50133  Mean = 30.42 
 % Relative Standard Deviation = 20.5 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50123  Mean = 51.82 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 11 
 Blind Sample ID = 5097/50DW  Mean = 104.00 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 20.00 
 % Relative Standard Deviation = 40.8 
 Number of Observations = 4 
 Blind Sample ID = 5095/50DW  Mean = 32.50 
 % Relative Standard Deviation = 29.5 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 12.00 
 % Relative Standard Deviation = 46.7 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 42.67 
 % Relative Standard Deviation = 28.7 
 Number of Observations = 15 
 Blind Sample ID = 5011/5007  Mean = 28.06 
 % Relative Standard Deviation = 29.7 
 Number of Observations = 31 
 Blind Sample ID = 5007/50DW  Mean = 51.46 
 % Relative Standard Deviation = 20.2 
 Number of Observations = 41 
 Blind Sample ID = 5007/5003  Mean = 24.85 
 % Relative Standard Deviation = 24.9 
 Number of Observations = 33 
 Blind Sample ID = 5003/50DW  Mean = 80.00 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 3 
 Blind Sample ID = 5003/5097  Mean = 129.09 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 11 
 Blind Sample ID = 5003/5001  Mean = 88.00 
 % Relative Standard Deviation = 20.6 
 Number of Observations = 10 
 Blind Sample ID = 33DW/6799  Mean = 72.50 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6797  Mean = 70.00 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 112.22 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 49.33 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 15 
 Blind Sample ID = 33DW/6707  Mean = 18.70 
 % Relative Standard Deviation = 37.1 
 Number of Observations = 23 
 Blind Sample ID = 33DW/6705  Mean = 36.15 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6703  Mean = 99.09 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 33 
 Blind Sample ID = 33DW-67121  Mean = 746.67 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 3 
 Blind Sample ID = 33DW-67115  Mean = 12.67 
 % Relative Standard Deviation = 35.5 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67105  Mean = 28.67 
 % Relative Standard Deviation = 17.7 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67103  Mean = 153.85 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 13 
 Blind Sample ID = 33DIW-67135  Mean = 66.76 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 34 
 Blind Sample ID = 33DIW-67131  Mean = 96.11 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 36 
 Blind Sample ID = 33DIW-67127  Mean = 51.43 
 % Relative Standard Deviation = 20.8 
 Number of Observations = 7 
 Blind Sample ID = 3399/67DW  Mean = 13.33 
 % Relative Standard Deviation = 49.4 
 Number of Observations = 21 
 Blind Sample ID = 3305/67DW  Mean = 80.00 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7599  Mean = 84.62 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7597  Mean = 274.00 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575  Mean = 46.15 
 % Relative Standard Deviation = 14.1 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7507  Mean = 36.47 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 17 
 Blind Sample ID = 25DW/7503  Mean = 111.56 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75121  Mean = 13.87 
 % Relative Standard Deviation = 35.7 
 Number of Observations = 31 
 Blind Sample ID = 25DW-75105  Mean = 28.75 
 % Relative Standard Deviation = 27.6 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75103  Mean = 172.50 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75135  Mean = 75.45 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 11 
 Blind Sample ID = 25DIW-75131  Mean = 113.33 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 3 
 Blind Sample ID = 25133-75127  Mean = 114.17 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 70.63 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505  Mean = 80.00 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 3 
 Blind Sample ID =
The SGPlot Procedure



- Iron, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01046, MCode: PLA11
Dates: 10/14/86 through 09/27/01
Open Data Set

 Mean = 102.20 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 6.41 
 % Relative Standard Deviation = 54.3 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 103.38 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 198.46 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 30.57 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 720.83 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 22.12 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 36 
 Blind Sample ID = 75DIW-25155  Mean = 9.48 
 % Relative Standard Deviation = 35.1 
 Number of Observations = 3 
 Blind Sample ID = 75DIW-25151  Mean = 3.84 
 % Relative Standard Deviation = 53.2 
 Number of Observations = 36 
 Blind Sample ID = 75DIW-25139  Mean = 18.84 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 31 
 Blind Sample ID = 75DIW-25137  Mean = 90.93 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 45 
 Blind Sample ID = 67DW-33113  Mean = 51.95 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 22 
 Blind Sample ID = 50DIW-50145  Mean = 107.67 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 3.51 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 37.94 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50137  Mean = 113.29 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 18.73 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 11 
 Blind Sample ID = 50DIW-50133  Mean = 119.60 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 88.23 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  Mean = 120.97 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 31 
 Blind Sample ID = 5097/5099  Mean = 152.08 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 24 
 Blind Sample ID = 5097/5001  Mean = 66.34 
 % Relative Standard Deviation = 24.2 
 Number of Observations = 41 
 Blind Sample ID = 5093/5087  Mean = 39.59 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 20 
 Blind Sample ID = 50157-50DIW  Mean = 41.01 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 63 
 Blind Sample ID = 50155-50DIW  Mean = 7.83 
 % Relative Standard Deviation = 29.2 
 Number of Observations = 16 
 Blind Sample ID = 50147-50151  Mean = 62.79 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 16 
 Blind Sample ID = 50145-50147  Mean = 116.64 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 22 
 Blind Sample ID = 50143-50151  Mean = 157.66 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 22 
 Blind Sample ID = 50143-50145  Mean = 52.83 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 26 
 Blind Sample ID = 50139-50145  Mean = 4.00 
 % Relative Standard Deviation = 36.4 
 Number of Observations = 42 
 Blind Sample ID = 50139-50141  Mean = 143.49 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 18 
 Blind Sample ID = 50137-50143  Mean = 36.05 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 35.85 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 24 
 Blind Sample ID = 50137-50139  Mean = 115.92 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 41 
 Blind Sample ID = 50135-50139  Mean = 148.56 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 94.77 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 161.60 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 97.60 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 30 
 Blind Sample ID = 50123-50121  Mean = 110.67 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 77.65 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 60 
 Blind Sample ID = 50121-50105  Mean = 615.50 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 60 
 Blind Sample ID = 50115-50103  Mean = 41.85 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 48 
 Blind Sample ID = 5011/5007  Mean = 230.63 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 115.43 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 49.08 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 125.08 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 61 
 Blind Sample ID = 5007/5001  Mean = 75.39 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 18 
 Blind Sample ID = 5003/5097  Mean = 128.61 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 69.67 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6797  Mean = 76.20 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 19.20 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  Mean = 37.40 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 29.61 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 28 
 Blind Sample ID = 33DW/6703  Mean = 37.13 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 24 
 Blind Sample ID = 33DW-67123  Mean = 92.54 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 26 
 Blind Sample ID = 33DW-67121  Mean = 792.07 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 29 
 Blind Sample ID = 33DW-67115  Mean = 150.63 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 16 
 Blind Sample ID = 33DIW-67135  Mean = 92.33 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 9 
 Blind Sample ID = 33DIW-67127  Mean = 67.38 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 29 
 Blind Sample ID = 33127-67133  Mean = 81.29 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 31 
 Blind Sample ID = 33127-67123  Mean = 80.68 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 6.58 
 % Relative Standard Deviation = 38.4 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  Mean = 15.71 
 % Relative Standard Deviation = 24.9 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7511  Mean = 43.00 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7507  Mean = 37.37 
 % Relative Standard Deviation = 18.6 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 106.09 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75121  Mean = 199.67 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 30 
 Blind Sample ID = 25DW-75113  Mean = 15.56 
 % Relative Standard Deviation = 23.6 
 Number of Observations = 16 
 Blind Sample ID = 25DW-75105  Mean = 38.24 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 15 
 Blind Sample ID = 25DIW-75159  Mean = 57.99 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 7.45 
 % Relative Standard Deviation = 27.5 
 Number of Observations = 68 
 Blind Sample ID = 25DIW-75151  Mean = 8.20 
 % Relative Standard Deviation = 55.2 
 Number of Observations = 7 
 Blind Sample ID = 25DIW-75147  Mean = 170.09 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 168.70 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 29 
 Blind Sample ID = 25DIW-75135  Mean = 68.44 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 100.38 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 55 
 Blind Sample ID = 25DIW-75127  Mean = 180.00 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 76.10 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 58 
 Blind Sample ID = 25159-75155  Mean = 56.28 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 20 
 Blind Sample ID = 25157-75159  Mean = 78.83 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 58 
 Blind Sample ID = 25155-75157  Mean = 77.76 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 12 
 Blind Sample ID = 25155-75153  Mean = 27.39 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 28 
 Blind Sample ID = 25155-75151  Mean = 29.81 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 42 
 Blind Sample ID = 25155-75147  Mean = 68.83 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 60.12 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 22 
 Blind Sample ID = 25151-75153  Mean = 9.86 
 % Relative Standard Deviation = 16.7 
 Number of Observations = 26 
 Blind Sample ID = 25151-75147  Mean = 169.05 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 22 
 Blind Sample ID = 25151-75143  Mean = 80.58 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 55 
 Blind Sample ID = 25147-75145  Mean = 31.07 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 5.22 
 % Relative Standard Deviation = 43.6 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 52.75 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 37 
 Blind Sample ID = 25139-75137  Mean = 108.50 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 20 
 Blind Sample ID = 25133-75127  Mean = 106.40 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 122.57 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 105 
 Blind Sample ID = 25125-75127  Mean = 220.81 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 62 
 Blind Sample ID = 25125-75113  Mean = 108.75 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 320.55 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 55 
 Blind Sample ID = 25117-75113  Mean = 252.73 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 55 
 Blind Sample ID = 25101-75113  Mean = 150.43 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501  Mean = 162.22 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 62.85 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 63.40 
 % Relative Standard Deviation = 16.7 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Iron, FIL, ICP-OES, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01046, MCode: PLA09
Dates: 10/08/92 through 09/27/94
Open Data Set

 Mean = 118.75 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25117  Mean = 94.50 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 8 
 Blind Sample ID = 67DW-33113  Mean = 238.75 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50117  Mean = 96.13 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67121  Mean = 111.25 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 16 
 Blind Sample ID = 25DW-75121
The SGPlot Procedure



- Iron, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01045, MCode: AA054
Dates: 10/14/86 through 03/15/99
Open Data Set

 Mean = 8485.71 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 7 
 Blind Sample ID = STS2  Mean = 105.00 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 12 
 Blind Sample ID = ST99  Mean = 110.67 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 15 
 Blind Sample ID = ST93  Mean = 15.00 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 3 
 Blind Sample ID = 75DIW-25151  Mean = 21.00 
 % Relative Standard Deviation = 23.2 
 Number of Observations = 10 
 Blind Sample ID = 75DIW-25137  Mean = 98.21 
 % Relative Standard Deviation = 15.6 
 Number of Observations = 39 
 Blind Sample ID = 67DW-33113  Mean = 101.67 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 18 
 Blind Sample ID = 50DW/5001  Mean = 57.50 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 249.00 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 10 
 Blind Sample ID = 50DW-50117  Mean = 107.50 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50101  Mean = 48.89 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 9 
 Blind Sample ID = 50DIW-50145  Mean = 108.75 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 40.06 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50137  Mean = 115.63 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 112.00 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 154.29 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 7 
 Blind Sample ID = 50143-50145  Mean = 54.63 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 10.41 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 17 
 Blind Sample ID = 50139-50141  Mean = 38.38 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 114.31 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 16 
 Blind Sample ID = 50135-50139  Mean = 146.14 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 7 
 Blind Sample ID = 50135-50137  Mean = 65.38 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 13 
 Blind Sample ID = 50125-50133  Mean = 85.56 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 27 
 Blind Sample ID = 50125-50123  Mean = 101.25 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 87.50 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 304.00 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 576.88 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 42.73 
 % Relative Standard Deviation = 36.4 
 Number of Observations = 11 
 Blind Sample ID = 5011/5007  Mean = 645.45 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 55.00 
 % Relative Standard Deviation = 36.6 
 Number of Observations = 10 
 Blind Sample ID = 5007/5003  Mean = 75.00 
 % Relative Standard Deviation = 23.1 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 117.78 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 9 
 Blind Sample ID = 5001/5011  Mean = 132.50 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 112.22 
 % Relative Standard Deviation = 16.5 
 Number of Observations = 9 
 Blind Sample ID = 5001/5003  Mean = 106.00 
 % Relative Standard Deviation = 31.7 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 78.57 
 % Relative Standard Deviation = 27.9 
 Number of Observations = 7 
 Blind Sample ID = 33DW/6793  Mean = 120.00 
 % Relative Standard Deviation = 19.5 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 22.86 
 % Relative Standard Deviation = 49.8 
 Number of Observations = 14 
 Blind Sample ID = 33DW/6705  Mean = 44.44 
 % Relative Standard Deviation = 29.5 
 Number of Observations = 27 
 Blind Sample ID = 33DW-67123  Mean = 100.00 
 % Relative Standard Deviation = 21.1 
 Number of Observations = 14 
 Blind Sample ID = 33DW-67121  Mean = 780.00 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 16 
 Blind Sample ID = 33DW-67115  Mean = 153.75 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 8 
 Blind Sample ID = 33DIW-67135  Mean = 64.44 
 % Relative Standard Deviation = 20.7 
 Number of Observations = 9 
 Blind Sample ID = 33DIW-67131  Mean = 51.67 
 % Relative Standard Deviation = 33.3 
 Number of Observations = 6 
 Blind Sample ID = 3399/67DW  Mean = 67.89 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 19 
 Blind Sample ID = 33127-67133  Mean = 96.00 
 % Relative Standard Deviation = 20.9 
 Number of Observations = 20 
 Blind Sample ID = 33127-67123  Mean = 20.00 
 % Relative Standard Deviation = 35.4 
 Number of Observations = 5 
 Blind Sample ID = 3305/67DW  Mean = 20.00 
 % Relative Standard Deviation = 47.1 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7511  Mean = 53.75 
 % Relative Standard Deviation = 24.2 
 Number of Observations = 8 
 Blind Sample ID = 25DW/7507  Mean = 40.00 
 % Relative Standard Deviation = 30.6 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7503  Mean = 213.72 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 43 
 Blind Sample ID = 25DW-75113  Mean = 17.78 
 % Relative Standard Deviation = 67.6 
 Number of Observations = 9 
 Blind Sample ID = 25DW-75105  Mean = 162.75 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75143  Mean = 168.88 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 81.82 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 11 
 Blind Sample ID = 25DIW-75131  Mean = 104.07 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 54 
 Blind Sample ID = 25DIW-75127  Mean = 73.00 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 5 
 Blind Sample ID = 25147-75145  Mean = 24.75 
 % Relative Standard Deviation = 26.9 
 Number of Observations = 4 
 Blind Sample ID = 25145-75147  Mean = 10.63 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 58.21 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 14 
 Blind Sample ID = 25139-75137  Mean = 182.43 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 14 
 Blind Sample ID = 25137-75135  Mean = 108.57 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 129.19 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 37 
 Blind Sample ID = 25125-75127  Mean = 242.11 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 19 
 Blind Sample ID = 25125-75113  Mean = 124.17 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Iron, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01045, MCode: PLA15
Dates: 04/05/99 through 09/28/01
Open Data Set

 Mean = 20.88 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 14 
 Blind Sample ID = 75DIW-25155  Mean = 52.97 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 38.13 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 12 
 Blind Sample ID = 50157-50DIW  Mean = 43.57 
 % Relative Standard Deviation = 20.2 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 34.24 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 15 
 Blind Sample ID = 25DIW-75159  Mean = 55.38 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 164.63 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 3 
 Blind Sample ID = 25DIW-75143  Mean = 73.70 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 47.52 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 72.97 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 27.77 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 9 
 Blind Sample ID = 25155-75147  Mean = 65.43 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 77.79 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 6 
 Blind Sample ID = 25147-75145  Mean = 28.05 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 4 
 Blind Sample ID = 25145-75147
The SGPlot Procedure



- Lead, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01049, MCode: CX007
Dates: 10/14/86 through 05/08/89
Open Data Set

 Mean = 5.75 
 % Relative Standard Deviation = 36.9 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 13.82 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 11 
 Blind Sample ID = ST97  Mean = 6.09 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 11 
 Blind Sample ID = 5097/50DW  Mean = 9.00 
 % Relative Standard Deviation = 30.4 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 5.31 
 % Relative Standard Deviation = 19.1 
 Number of Observations = 16 
 Blind Sample ID = 5003/50DW  Mean = 10.38 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6797  Mean = 5.88 
 % Relative Standard Deviation = 14.2 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 6.33 
 % Relative Standard Deviation = 57.5 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 11.86 
 % Relative Standard Deviation = 39.7 
 Number of Observations = 22 
 Blind Sample ID = 25DW/7597  Mean = 12.40 
 % Relative Standard Deviation = 27.7 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575
The SGPlot Procedure



- Lead, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01049, MCode: GF089
Dates: 05/15/89 through 09/24/01
Open Data Set

 Mean = 4.93 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25155  Mean = 5.08 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25151  Mean = 1.20 
 % Relative Standard Deviation = 24.7 
 Number of Observations = 22 
 Blind Sample ID = 75DIW-25139  Mean = 1.60 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25137  Mean = 5.16 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50123  Mean = 3.94 
 % Relative Standard Deviation = 17.0 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50121  Mean = 7.35 
 % Relative Standard Deviation = 19.7 
 Number of Observations = 31 
 Blind Sample ID = 50DW-50115  Mean = 6.93 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 42.39 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 7 
 Blind Sample ID = 50DIW-50143  Mean = 2.36 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 2.87 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50137  Mean = 52.94 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 14.67 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50133  Mean = 5.21 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50123  Mean = 3.70 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 8 
 Blind Sample ID = 50157-50DIW  Mean = 5.14 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 26 
 Blind Sample ID = 50139-50141  Mean = 5.21 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 8 
 Blind Sample ID = 50137-50139  Mean = 55.24 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 23 
 Blind Sample ID = 50135-50139  Mean = 9.00 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 9.94 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 11.88 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 6.53 
 % Relative Standard Deviation = 29.4 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 20.87 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 15 
 Blind Sample ID = 5011/5007  Mean = 11.90 
 % Relative Standard Deviation = 25.3 
 Number of Observations = 31 
 Blind Sample ID = 5007/50DW  Mean = 16.83 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 41 
 Blind Sample ID = 5007/5003  Mean = 4.88 
 % Relative Standard Deviation = 46.7 
 Number of Observations = 16 
 Blind Sample ID = 5003/50DW  Mean = 7.00 
 % Relative Standard Deviation = 70.0 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 12.92 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 12 
 Blind Sample ID = 5003/5001  Mean = 7.83 
 % Relative Standard Deviation = 36.0 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6797  Mean = 23.31 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 17.00 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 15 
 Blind Sample ID = 33DW/6707  Mean = 6.68 
 % Relative Standard Deviation = 24.6 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6705  Mean = 6.25 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 16 
 Blind Sample ID = 33DW/6703  Mean = 5.39 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 46 
 Blind Sample ID = 33DW-67121  Mean = 9.65 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 8.07 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67105  Mean = 6.57 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67103  Mean = 67.48 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 29 
 Blind Sample ID = 33DIW-67135  Mean = 12.44 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 36 
 Blind Sample ID = 33DIW-67131  Mean = 2.33 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 45 
 Blind Sample ID = 33DIW-67127  Mean = 12.17 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 4.11 
 % Relative Standard Deviation = 40.5 
 Number of Observations = 19 
 Blind Sample ID = 3305/67DW  Mean = 9.11 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 9 
 Blind Sample ID = 25DW/7597  Mean = 18.86 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7507  Mean = 7.17 
 % Relative Standard Deviation = 26.6 
 Number of Observations = 24 
 Blind Sample ID = 25DW/7503  Mean = 5.85 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 33 
 Blind Sample ID = 25DW-75121  Mean = 9.55 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 31 
 Blind Sample ID = 25DW-75105  Mean = 7.16 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75103  Mean = 13.65 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75159  Mean = 36.39 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 11.05 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75147  Mean = 65.46 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 78.18 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 14.17 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 20.13 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 16.35 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 8 
 Blind Sample ID = 25157-75159  Mean = 10.77 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 15.95 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 8 
 Blind Sample ID = 25155-75147  Mean = 19.92 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 13.31 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 13.84 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 5.59 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137  Mean = 9.71 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 4.92 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 5.67 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504  Mean = 12.13 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505  Mean = 12.67 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 3 
 Blind Sample ID =
The SGPlot Procedure



- Lead, FIL, GFAA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01049, MCode: GF078
Dates: 03/06/87 through 09/13/95
Open Data Set

 Mean = 1.47 
 % Relative Standard Deviation = 36.0 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25117  Mean = 3.21 
 % Relative Standard Deviation = 39.4 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25103  Mean = 2.27 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 11 
 Blind Sample ID = 75DIW-25125  Mean = 0.55 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 8 
 Blind Sample ID = 67DW-33113  Mean = 2.65 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50117  Mean = 4.55 
 % Relative Standard Deviation = 38.7 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50103  Mean = 7.13 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 3 
 Blind Sample ID = 5097/50DW  Mean = 9.05 
 % Relative Standard Deviation = 24.3 
 Number of Observations = 23 
 Blind Sample ID = 5001/50DW  Mean = 5.50 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67121  Mean = 0.57 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7599  Mean = 9.07 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7593  Mean = 4.23 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 4 
 Blind Sample ID = 25DW/7585  Mean = 22.25 
 % Relative Standard Deviation = 23.9 
 Number of Observations = 4 
 Blind Sample ID = 25DW/7507  Mean = 7.79 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7505  Mean = 6.16 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 16 
 Blind Sample ID = 25DW-75121  Mean = 6.08 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 8 
 Blind Sample ID = 25DW-75103  Mean = 4.45 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 12 
 Blind Sample ID = 2501/75DW
The SGPlot Procedure



- Lead, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01049, MCode: PLM43
Dates: 02/07/94 through 09/27/01
Open Data Set

 Mean = 31.65 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 34 
 Blind Sample ID = GT3  Mean = 4.93 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25155  Mean = 1.09 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 1.57 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 32 
 Blind Sample ID = 75DIW-25137  Mean = 2.06 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25125  Mean = 6.45 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 41.71 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 50.85 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 3.74 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 36 
 Blind Sample ID = 50157-50DIW  Mean = 8.98 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 37 
 Blind Sample ID = 50155-50DIW  Mean = 50.64 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 27 
 Blind Sample ID = 50143-50151  Mean = 47.74 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 54.30 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 17.93 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 9.03 
 % Relative Standard Deviation = 18.5 
 Number of Observations = 32 
 Blind Sample ID = 50125-50123  Mean = 14.75 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 35 
 Blind Sample ID = 25157-75159  Mean = 39.40 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 18.92 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 13.40 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 4.85 
 % Relative Standard Deviation = 15.7 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 2.44 
 % Relative Standard Deviation = 21.0 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Lead, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01049, MCode: PLA11
Dates: 10/14/86 through 08/03/00
Open Data Set

 Mean = 16.48 
 % Relative Standard Deviation = 29.2 
 Number of Observations = 54 
 Blind Sample ID = ST97  Mean = 15.00 
 % Relative Standard Deviation = 35.6 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 18.57 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 10.59 
 % Relative Standard Deviation = 22.9 
 Number of Observations = 17 
 Blind Sample ID = 67DW-33113  Mean = 11.54 
 % Relative Standard Deviation = 32.5 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  Mean = 11.61 
 % Relative Standard Deviation = 32.2 
 Number of Observations = 31 
 Blind Sample ID = 5097/5099  Mean = 17.60 
 % Relative Standard Deviation = 47.2 
 Number of Observations = 25 
 Blind Sample ID = 5097/5001  Mean = 10.49 
 % Relative Standard Deviation = 20.8 
 Number of Observations = 41 
 Blind Sample ID = 5093/5087  Mean = 71.59 
 % Relative Standard Deviation = 21.2 
 Number of Observations = 10 
 Blind Sample ID = 50143-50151  Mean = 45.25 
 % Relative Standard Deviation = 23.2 
 Number of Observations = 5 
 Blind Sample ID = 50143-50145  Mean = 13.35 
 % Relative Standard Deviation = 41.0 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 56.28 
 % Relative Standard Deviation = 20.6 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 16.59 
 % Relative Standard Deviation = 59.5 
 Number of Observations = 44 
 Blind Sample ID = 50131-50125  Mean = 58.00 
 % Relative Standard Deviation = 18.6 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 10.42 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 24 
 Blind Sample ID = 50123-50121  Mean = 11.25 
 % Relative Standard Deviation = 30.0 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 11.59 
 % Relative Standard Deviation = 31.9 
 Number of Observations = 44 
 Blind Sample ID = 50121-50105  Mean = 14.04 
 % Relative Standard Deviation = 38.3 
 Number of Observations = 47 
 Blind Sample ID = 50115-50103  Mean = 20.41 
 % Relative Standard Deviation = 28.2 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 12.71 
 % Relative Standard Deviation = 42.1 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 14.78 
 % Relative Standard Deviation = 42.2 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 20.00 
 % Relative Standard Deviation = 28.9 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 23.83 
 % Relative Standard Deviation = 24.5 
 Number of Observations = 60 
 Blind Sample ID = 5007/5001  Mean = 12.11 
 % Relative Standard Deviation = 44.2 
 Number of Observations = 19 
 Blind Sample ID = 5003/5097  Mean = 19.44 
 % Relative Standard Deviation = 45.9 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 12.67 
 % Relative Standard Deviation = 36.1 
 Number of Observations = 15 
 Blind Sample ID = 33DW/6797  Mean = 11.33 
 % Relative Standard Deviation = 30.3 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 19.50 
 % Relative Standard Deviation = 26.2 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 10.77 
 % Relative Standard Deviation = 25.2 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6703  Mean = 11.43 
 % Relative Standard Deviation = 33.1 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7597  Mean = 13.57 
 % Relative Standard Deviation = 36.6 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7511  Mean = 22.50 
 % Relative Standard Deviation = 27.6 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 11.05 
 % Relative Standard Deviation = 28.5 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 10.45 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 22 
 Blind Sample ID = 25DW-75121  Mean = 54.25 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 3 
 Blind Sample ID = 25DIW-75151  Mean = 80.63 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 17.06 
 % Relative Standard Deviation = 57.8 
 Number of Observations = 17 
 Blind Sample ID = 25DIW-75131  Mean = 13.75 
 % Relative Standard Deviation = 36.4 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 58.48 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 3 
 Blind Sample ID = 25155-75153  Mean = 13.96 
 % Relative Standard Deviation = 46.7 
 Number of Observations = 32 
 Blind Sample ID = 25141-75139  Mean = 15.63 
 % Relative Standard Deviation = 40.3 
 Number of Observations = 16 
 Blind Sample ID = 25133-75127  Mean = 12.50 
 % Relative Standard Deviation = 47.1 
 Number of Observations = 40 
 Blind Sample ID = 25127-75125  Mean = 12.50 
 % Relative Standard Deviation = 39.5 
 Number of Observations = 40 
 Blind Sample ID = 25125-75127  Mean = 11.30 
 % Relative Standard Deviation = 35.4 
 Number of Observations = 46 
 Blind Sample ID = 25125-75113  Mean = 14.09 
 % Relative Standard Deviation = 52.1 
 Number of Observations = 22 
 Blind Sample ID = 25123-75127  Mean = 25.33 
 % Relative Standard Deviation = 25.3 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 22.17 
 % Relative Standard Deviation = 33.2 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501  Mean = 14.44 
 % Relative Standard Deviation = 42.6 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 30.43 
 % Relative Standard Deviation = 19.3 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 16.15 
 % Relative Standard Deviation = 31.3 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 16.00 
 % Relative Standard Deviation = 55.9 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Lead, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01051, MCode: CX017
Dates: 10/14/86 through 04/27/89
Open Data Set

 Mean = 31.75 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 27.75 
 % Relative Standard Deviation = 35.5 
 Number of Observations = 4 
 Blind Sample ID = STS1  Mean = 5.21 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 14 
 Blind Sample ID = ST99  Mean = 11.67 
 % Relative Standard Deviation = 31.1 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 9.00 
 % Relative Standard Deviation = 32.7 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5001  Mean = 10.00 
 % Relative Standard Deviation = 31.6 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 13.43 
 % Relative Standard Deviation = 29.4 
 Number of Observations = 7 
 Blind Sample ID = 5001/5003  Mean = 8.13 
 % Relative Standard Deviation = 29.7 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 6.11 
 % Relative Standard Deviation = 54.5 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 7.40 
 % Relative Standard Deviation = 36.5 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7503
The SGPlot Procedure



- Lead, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01051, MCode: GF100
Dates: 05/08/89 through 09/28/01
Open Data Set

 Mean = 4.90 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 14 
 Blind Sample ID = 75DIW-25155  Mean = 4.90 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 24 
 Blind Sample ID = 75DIW-25151  Mean = 1.60 
 % Relative Standard Deviation = 16.4 
 Number of Observations = 10 
 Blind Sample ID = 75DIW-25137  Mean = 10.73 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  Mean = 4.08 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 2.58 
 % Relative Standard Deviation = 19.9 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50117  Mean = 11.22 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 6.62 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 18 
 Blind Sample ID = 50DIW-50145  Mean = 41.53 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 2.18 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 3.12 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50137  Mean = 52.94 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 3.80 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 12 
 Blind Sample ID = 50157-50DIW  Mean = 9.20 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 49.79 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 8 
 Blind Sample ID = 50143-50145  Mean = 8.69 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 5.32 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 17 
 Blind Sample ID = 50139-50141  Mean = 6.30 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 54.41 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 16 
 Blind Sample ID = 50135-50139  Mean = 54.46 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 18.69 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 13 
 Blind Sample ID = 50125-50133  Mean = 9.32 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 28 
 Blind Sample ID = 50125-50123  Mean = 9.00 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 9.81 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 6.50 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 11.44 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 22.21 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 17.82 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 16.79 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 14 
 Blind Sample ID = 5007/5003  Mean = 12.25 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 17.30 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 10 
 Blind Sample ID = 5001/5011  Mean = 21.25 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 14.00 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 3 
 Blind Sample ID = 5001/5003  Mean = 1.40 
 % Relative Standard Deviation = 63.9 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 24.92 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 7.95 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6705  Mean = 6.82 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 28 
 Blind Sample ID = 33DW-67123  Mean = 5.00 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 14 
 Blind Sample ID = 33DW-67121  Mean = 9.76 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 71.38 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 8 
 Blind Sample ID = 33DIW-67135  Mean = 11.83 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 1.33 
 % Relative Standard Deviation = 43.3 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 20.11 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 19 
 Blind Sample ID = 33127-67133  Mean = 7.95 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 20 
 Blind Sample ID = 33127-67123  Mean = 12.75 
 % Relative Standard Deviation = 21.4 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 4.47 
 % Relative Standard Deviation = 20.5 
 Number of Observations = 15 
 Blind Sample ID = 3305/67DW  Mean = 13.18 
 % Relative Standard Deviation = 32.3 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7511  Mean = 21.38 
 % Relative Standard Deviation = 28.7 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7507  Mean = 7.33 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7503  Mean = 9.57 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 14 
 Blind Sample ID = 25DW-75105  Mean = 13.57 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75159  Mean = 34.48 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 10.78 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 19 
 Blind Sample ID = 25DIW-75147  Mean = 64.14 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 77.41 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 14.00 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 2.51 
 % Relative Standard Deviation = 20.1 
 Number of Observations = 55 
 Blind Sample ID = 25DIW-75127  Mean = 20.45 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 15.52 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 10.45 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 15.84 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 9 
 Blind Sample ID = 25155-75147  Mean = 19.87 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 13.17 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 14 
 Blind Sample ID = 25147-75145  Mean = 14.09 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 4.93 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 5.88 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 13 
 Blind Sample ID = 25139-75137  Mean = 79.39 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 14 
 Blind Sample ID = 25137-75135  Mean = 9.57 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 4.65 
 % Relative Standard Deviation = 14.2 
 Number of Observations = 40 
 Blind Sample ID = 25125-75127  Mean = 2.85 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 20 
 Blind Sample ID = 25125-75113  Mean = 4.92 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Lithium, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01130, MCode: AA021
Dates: 01/11/90 through 03/27/96
Open Data Set

 Mean = 112.96 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 27 
 Blind Sample ID = 5007/5003  Mean = 55.00 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 4 
 Blind Sample ID = 33DIW-67135  Mean = 13.33 
 % Relative Standard Deviation = 36.9 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 62.50 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75135  Mean = 12.50 
 % Relative Standard Deviation = 36.2 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 36.67 
 % Relative Standard Deviation = 15.7 
 Number of Observations = 3 
 Blind Sample ID = 25133-75127  Mean = 23.33 
 % Relative Standard Deviation = 21.1 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Lithium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01130, MCode: PLA11
Dates: 10/14/86 through 09/27/01
Open Data Set

 Mean = 47.18 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 32.06 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 23.13 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 23.92 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 44.00 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 473.33 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 7.37 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25151  Mean = 14.44 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 41 
 Blind Sample ID = 67DW-33113  Mean = 10.07 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 10.27 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 5.76 
 % Relative Standard Deviation = 21.2 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50137  Mean = 35.46 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 109.60 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 114.33 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 30 
 Blind Sample ID = 5097/5099  Mean = 58.96 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 24 
 Blind Sample ID = 5097/5001  Mean = 24.10 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 41 
 Blind Sample ID = 5093/5087  Mean = 16.28 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 12 
 Blind Sample ID = 50157-50DIW  Mean = 16.20 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 13 
 Blind Sample ID = 50155-50DIW  Mean = 23.60 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 22 
 Blind Sample ID = 50143-50151  Mean = 24.23 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 22 
 Blind Sample ID = 50143-50145  Mean = 24.72 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 26 
 Blind Sample ID = 50139-50145  Mean = 15.43 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 40.49 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 15.00 
 % Relative Standard Deviation = 22.0 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 43.92 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 17.43 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 30 
 Blind Sample ID = 50123-50121  Mean = 21.38 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 51.08 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 60 
 Blind Sample ID = 50121-50105  Mean = 79.78 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 49 
 Blind Sample ID = 50115-50103  Mean = 107.92 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 47.77 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 50.80 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 111.20 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 129.02 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 61 
 Blind Sample ID = 5007/5001  Mean = 36.84 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 19 
 Blind Sample ID = 5003/5097  Mean = 51.39 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 30.67 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6797  Mean = 15.76 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 8.80 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  Mean = 133.50 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 20.85 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6703  Mean = 5.88 
 % Relative Standard Deviation = 24.8 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 17.92 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 13 
 Blind Sample ID = 33DW-67121  Mean = 46.75 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 4 
 Blind Sample ID = 33DIW-67135  Mean = 34.76 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 21.37 
 % Relative Standard Deviation = 23.9 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  Mean = 8.50 
 % Relative Standard Deviation = 16.5 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7511  Mean = 148.18 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7507  Mean = 22.74 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 18.78 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75121  Mean = 6.40 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75159  Mean = 40.19 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 20.97 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 33 
 Blind Sample ID = 25DIW-75151  Mean = 12.27 
 % Relative Standard Deviation = 34.6 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75147  Mean = 14.46 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 51.94 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 29 
 Blind Sample ID = 25DIW-75135  Mean = 12.17 
 % Relative Standard Deviation = 30.3 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 100.25 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 27.92 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 6 
 Blind Sample ID = 25159-75155  Mean = 14.64 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 11 
 Blind Sample ID = 25157-75159  Mean = 33.95 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 7 
 Blind Sample ID = 25155-75157  Mean = 48.69 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 12 
 Blind Sample ID = 25155-75153  Mean = 21.52 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 12 
 Blind Sample ID = 25155-75147  Mean = 31.14 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 25.18 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 26 
 Blind Sample ID = 25147-75145  Mean = 21.34 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 19.36 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 13.15 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 24 
 Blind Sample ID = 25139-75137  Mean = 30.75 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 20 
 Blind Sample ID = 25133-75127  Mean = 18.67 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 22.51 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 41 
 Blind Sample ID = 25125-75127  Mean = 38.22 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 46 
 Blind Sample ID = 25125-75113  Mean = 21.08 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 39.41 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 41 
 Blind Sample ID = 25117-75113  Mean = 51.38 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 39 
 Blind Sample ID = 25101-75113  Mean = 54.07 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 71.22 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501  Mean = 154.44 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 29.06 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 77.85 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 22.00 
 % Relative Standard Deviation = 89.9 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Lithium, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01132, MCode: AA057
Dates: 10/14/86 through 01/25/99
Open Data Set

 Mean = 240.00 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 180.00 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 6 
 Blind Sample ID = ST99  Mean = 33.68 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 19 
 Blind Sample ID = 50DW/5001  Mean = 11.11 
 % Relative Standard Deviation = 30.0 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50125  Mean = 14.17 
 % Relative Standard Deviation = 36.3 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50117  Mean = 38.89 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 22.86 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 7 
 Blind Sample ID = 50143-50145  Mean = 23.50 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 4 
 Blind Sample ID = 50139-50145  Mean = 33.08 
 % Relative Standard Deviation = 14.5 
 Number of Observations = 13 
 Blind Sample ID = 50125-50133  Mean = 15.83 
 % Relative Standard Deviation = 41.3 
 Number of Observations = 24 
 Blind Sample ID = 50125-50123  Mean = 29.00 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 92.73 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 39.00 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 10 
 Blind Sample ID = 5001/5011  Mean = 135.00 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 48.00 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 10 
 Blind Sample ID = 5001/5003  Mean = 146.67 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 21.25 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 8 
 Blind Sample ID = 25DW/7503  Mean = 37.37 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 19 
 Blind Sample ID = 25DW-75113  Mean = 59.23 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 13 
 Blind Sample ID = 25DW-75105  Mean = 20.00 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 15 
 Blind Sample ID = 25DIW-75127
The SGPlot Procedure



- Lithium, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01132, MCode: PLA15
Dates: 04/26/99 through 09/14/01
Open Data Set

 Mean = 7.69 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 4 
 Blind Sample ID = 75DIW-25155  Mean = 15.93 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 18.02 
 % Relative Standard Deviation = 31.9 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 12.78 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75147  Mean = 13.05 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 21.07 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147
The SGPlot Procedure



- Manganese, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01056, MCode: AA025
Dates: 10/14/86 through 03/29/96
Open Data Set

 Mean = 80.00 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 15.63 
 % Relative Standard Deviation = 32.3 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50121  Mean = 228.62 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 29 
 Blind Sample ID = 50DW-50115  Mean = 61.67 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 12 
 Blind Sample ID = 50DIW-50133  Mean = 11.67 
 % Relative Standard Deviation = 32.6 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50123  Mean = 18.18 
 % Relative Standard Deviation = 22.2 
 Number of Observations = 11 
 Blind Sample ID = 5097/50DW  Mean = 54.00 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 240.00 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 3 
 Blind Sample ID = 50115-50103  Mean = 10.30 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 33 
 Blind Sample ID = 5003/50DW  Mean = 17.50 
 % Relative Standard Deviation = 28.6 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 28.33 
 % Relative Standard Deviation = 29.5 
 Number of Observations = 12 
 Blind Sample ID = 5003/5001  Mean = 51.00 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 10 
 Blind Sample ID = 33DW/6799  Mean = 62.50 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 62.22 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 30.00 
 % Relative Standard Deviation = 19.2 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 52.61 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 23 
 Blind Sample ID = 33DW/6705  Mean = 21.21 
 % Relative Standard Deviation = 28.3 
 Number of Observations = 33 
 Blind Sample ID = 33DW-67121  Mean = 306.67 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 3 
 Blind Sample ID = 33DW-67115  Mean = 52.00 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67105  Mean = 291.54 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 13 
 Blind Sample ID = 33DIW-67135  Mean = 28.86 
 % Relative Standard Deviation = 18.4 
 Number of Observations = 35 
 Blind Sample ID = 33DIW-67131  Mean = 10.83 
 % Relative Standard Deviation = 34.0 
 Number of Observations = 36 
 Blind Sample ID = 33DIW-67127  Mean = 28.57 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 7 
 Blind Sample ID = 3399/67DW  Mean = 14.55 
 % Relative Standard Deviation = 35.9 
 Number of Observations = 11 
 Blind Sample ID = 3309/67DW  Mean = 26.67 
 % Relative Standard Deviation = 21.7 
 Number of Observations = 21 
 Blind Sample ID = 3305/67DW  Mean = 60.00 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 6 
 Blind Sample ID = 25DW/7599  Mean = 20.77 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7597  Mean = 397.00 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575  Mean = 21.88 
 % Relative Standard Deviation = 21.5 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75121  Mean = 54.67 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 30 
 Blind Sample ID = 25DW-75105  Mean = 312.50 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75135  Mean = 31.82 
 % Relative Standard Deviation = 27.5 
 Number of Observations = 11 
 Blind Sample ID = 25DIW-75131  Mean = 36.67 
 % Relative Standard Deviation = 15.7 
 Number of Observations = 3 
 Blind Sample ID = 25133-75127  Mean = 10.83 
 % Relative Standard Deviation = 26.6 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 66.88 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505  Mean = 23.33 
 % Relative Standard Deviation = 24.7 
 Number of Observations = 3 
 Blind Sample ID =
The SGPlot Procedure



- Manganese, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01056, MCode: PLM43
Dates: 02/07/94 through 09/27/01
Open Data Set

 Mean = 5.79 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 34 
 Blind Sample ID = GT3  Mean = 12.83 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25155  Mean = 1.03 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 15 
 Blind Sample ID = 75DIW-25139  Mean = 23.32 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 32 
 Blind Sample ID = 75DIW-25137  Mean = 10.55 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 8.99 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 207.58 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 73.19 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 24.18 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 15.63 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 28 
 Blind Sample ID = 50143-50151  Mean = 18.89 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 254.38 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 66.47 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 14.78 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 32 
 Blind Sample ID = 50125-50123  Mean = 50.48 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 67.96 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 41.29 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 17.99 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 8.33 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 49.81 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Manganese, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01056, MCode: PLA11
Dates: 10/14/86 through 09/27/01
Open Data Set

 Mean = 31.47 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 64 
 Blind Sample ID = ST97  Mean = 2.18 
 % Relative Standard Deviation = 46.6 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 99.50 
 % Relative Standard Deviation = 0.5 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 98.85 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 277.14 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 550.83 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 12.97 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 36 
 Blind Sample ID = 75DIW-25155  Mean = 3.39 
 % Relative Standard Deviation = 13.7 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25151  Mean = 1.21 
 % Relative Standard Deviation = 37.1 
 Number of Observations = 34 
 Blind Sample ID = 75DIW-25139  Mean = 23.47 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 31 
 Blind Sample ID = 75DIW-25137  Mean = 21.24 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 46 
 Blind Sample ID = 67DW-33113  Mean = 10.66 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 22 
 Blind Sample ID = 50DIW-50145  Mean = 8.93 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 1.25 
 % Relative Standard Deviation = 19.3 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 47.23 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50137  Mean = 206.26 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 60.42 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 12 
 Blind Sample ID = 50DIW-50133  Mean = 90.58 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 24 
 Blind Sample ID = 5099/5093  Mean = 170.77 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  Mean = 56.45 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 31 
 Blind Sample ID = 5097/5099  Mean = 39.83 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = 5097/5001  Mean = 51.90 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 41 
 Blind Sample ID = 5093/5087  Mean = 76.03 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 19 
 Blind Sample ID = 50157-50DIW  Mean = 24.45 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 63 
 Blind Sample ID = 50155-50DIW  Mean = 15.10 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 18 
 Blind Sample ID = 50147-50151  Mean = 19.23 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 16 
 Blind Sample ID = 50145-50147  Mean = 15.93 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 21 
 Blind Sample ID = 50143-50151  Mean = 19.61 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 22 
 Blind Sample ID = 50143-50145  Mean = 11.60 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 26 
 Blind Sample ID = 50139-50145  Mean = 11.25 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 27 
 Blind Sample ID = 50139-50141  Mean = 56.57 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 18 
 Blind Sample ID = 50137-50143  Mean = 57.92 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 48.03 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 24 
 Blind Sample ID = 50137-50139  Mean = 210.73 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 41 
 Blind Sample ID = 50135-50139  Mean = 255.02 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 27.56 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 220.40 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 21.23 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 30 
 Blind Sample ID = 50123-50121  Mean = 23.46 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 52.02 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 60 
 Blind Sample ID = 50121-50105  Mean = 227.17 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 60 
 Blind Sample ID = 50115-50103  Mean = 142.92 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 28.30 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 19.67 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 18 
 Blind Sample ID = 5003/5097  Mean = 29.14 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 21.11 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6797  Mean = 66.80 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 6.64 
 % Relative Standard Deviation = 36.5 
 Number of Observations = 28 
 Blind Sample ID = 33DW/6703  Mean = 9.00 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 24 
 Blind Sample ID = 33DW-67123  Mean = 19.27 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 26 
 Blind Sample ID = 33DW-67121  Mean = 297.59 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 29 
 Blind Sample ID = 33DW-67115  Mean = 275.63 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 16 
 Blind Sample ID = 33DIW-67135  Mean = 3.78 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 9 
 Blind Sample ID = 33DIW-67127  Mean = 82.86 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 29 
 Blind Sample ID = 33127-67133  Mean = 10.84 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 31 
 Blind Sample ID = 33127-67123  Mean = 25.00 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 1.53 
 % Relative Standard Deviation = 45.6 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  Mean = 6.58 
 % Relative Standard Deviation = 22.3 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 21.61 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75121  Mean = 48.10 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 30 
 Blind Sample ID = 25DW-75113  Mean = 55.19 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 16 
 Blind Sample ID = 25DW-75105  Mean = 17.23 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 15 
 Blind Sample ID = 25DIW-75159  Mean = 56.23 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 9.79 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 89 
 Blind Sample ID = 25DIW-75151  Mean = 12.84 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75147  Mean = 13.97 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 313.17 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 29 
 Blind Sample ID = 25DIW-75135  Mean = 27.83 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 4.24 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 55 
 Blind Sample ID = 25DIW-75127  Mean = 57.69 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 44.00 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 58 
 Blind Sample ID = 25159-75155  Mean = 51.55 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 20 
 Blind Sample ID = 25157-75159  Mean = 126.24 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 56 
 Blind Sample ID = 25155-75157  Mean = 69.15 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 12 
 Blind Sample ID = 25155-75153  Mean = 22.42 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 28 
 Blind Sample ID = 25155-75151  Mean = 25.40 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 42 
 Blind Sample ID = 25155-75147  Mean = 41.06 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 59.08 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 22 
 Blind Sample ID = 25151-75153  Mean = 16.45 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 26 
 Blind Sample ID = 25151-75147  Mean = 17.10 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 22 
 Blind Sample ID = 25151-75143  Mean = 20.26 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 55 
 Blind Sample ID = 25147-75145  Mean = 18.35 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 6.85 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 23 
 Blind Sample ID = 25141-75139  Mean = 71.84 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 37 
 Blind Sample ID = 25139-75137  Mean = 34.35 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 20 
 Blind Sample ID = 25133-75127  Mean = 14.62 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 8.68 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 105 
 Blind Sample ID = 25125-75127  Mean = 52.85 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 62 
 Blind Sample ID = 25125-75113  Mean = 7.25 
 % Relative Standard Deviation = 17.4 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 102.82 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 56 
 Blind Sample ID = 25117-75113  Mean = 60.40 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 55 
 Blind Sample ID = 25101-75113  Mean = 48.93 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 14 
 Blind Sample ID = 2509/7501  Mean = 56.17 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501  Mean = 73.11 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 39.20 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 44 
 Blind Sample ID = 2501/7509  Mean = 67.92 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 29.80 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Manganese, FIL, ICP-OES, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01056, MCode: PLA09
Dates: 10/08/92 through 09/27/94
Open Data Set

 Mean = 54.88 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25117  Mean = 21.13 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 8 
 Blind Sample ID = 67DW-33113  Mean = 111.25 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50117  Mean = 19.00 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67121  Mean = 22.19 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 16 
 Blind Sample ID = 25DW-75121
The SGPlot Procedure



- Manganese, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01055, MCode: AA060
Dates: 10/14/86 through 03/15/99
Open Data Set

 Mean = 56.25 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 290.00 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 3 
 Blind Sample ID = STS1  Mean = 83.57 
 % Relative Standard Deviation = 14.5 
 Number of Observations = 14 
 Blind Sample ID = ST99  Mean = 98.24 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 17 
 Blind Sample ID = ST93  Mean = 26.41 
 % Relative Standard Deviation = 30.7 
 Number of Observations = 39 
 Blind Sample ID = 67DW-33113  Mean = 30.56 
 % Relative Standard Deviation = 20.9 
 Number of Observations = 18 
 Blind Sample ID = 50DW/5001  Mean = 10.83 
 % Relative Standard Deviation = 26.6 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 117.50 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50117  Mean = 32.22 
 % Relative Standard Deviation = 13.7 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 10.22 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 9 
 Blind Sample ID = 50DIW-50145  Mean = 45.00 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50137  Mean = 209.50 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 56.00 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 19.88 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 8 
 Blind Sample ID = 50143-50145  Mean = 13.75 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 57.00 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 250.63 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 66.15 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 13 
 Blind Sample ID = 50125-50133  Mean = 20.00 
 % Relative Standard Deviation = 30.4 
 Number of Observations = 28 
 Blind Sample ID = 50125-50123  Mean = 27.50 
 % Relative Standard Deviation = 25.7 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 58.13 
 % Relative Standard Deviation = 15.7 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 127.00 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 226.88 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 255.45 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 38.89 
 % Relative Standard Deviation = 15.5 
 Number of Observations = 9 
 Blind Sample ID = 5001/5003  Mean = 60.00 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 72.50 
 % Relative Standard Deviation = 16.1 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 68.89 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 24.62 
 % Relative Standard Deviation = 26.8 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 58.67 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 15 
 Blind Sample ID = 33DW/6705  Mean = 12.50 
 % Relative Standard Deviation = 37.0 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 22.86 
 % Relative Standard Deviation = 36.1 
 Number of Observations = 14 
 Blind Sample ID = 33DW-67121  Mean = 305.33 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 15 
 Blind Sample ID = 33DW-67115  Mean = 273.75 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 33DIW-67135  Mean = 22.50 
 % Relative Standard Deviation = 38.5 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 32.86 
 % Relative Standard Deviation = 23.0 
 Number of Observations = 7 
 Blind Sample ID = 3399/67DW  Mean = 14.55 
 % Relative Standard Deviation = 35.9 
 Number of Observations = 11 
 Blind Sample ID = 3309/67DW  Mean = 36.43 
 % Relative Standard Deviation = 25.5 
 Number of Observations = 14 
 Blind Sample ID = 3305/67DW  Mean = 15.00 
 % Relative Standard Deviation = 35.6 
 Number of Observations = 8 
 Blind Sample ID = 25DW/7503  Mean = 55.00 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 24 
 Blind Sample ID = 25DW-75113  Mean = 62.00 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 10 
 Blind Sample ID = 25DW-75105  Mean = 15.08 
 % Relative Standard Deviation = 13.7 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75143  Mean = 313.81 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 31.82 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 11 
 Blind Sample ID = 25DIW-75131  Mean = 10.63 
 % Relative Standard Deviation = 23.5 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75127  Mean = 24.17 
 % Relative Standard Deviation = 33.8 
 Number of Observations = 6 
 Blind Sample ID = 25147-75145  Mean = 18.00 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 4 
 Blind Sample ID = 25145-75147  Mean = 10.13 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 71.00 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137  Mean = 40.00 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 13.33 
 % Relative Standard Deviation = 48.9 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Manganese, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01055, MCode: PLA15
Dates: 04/05/99 through 09/24/01
Open Data Set

 Mean = 12.43 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 4 
 Blind Sample ID = 75DIW-25155  Mean = 3.16 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 11 
 Blind Sample ID = 75DIW-25151  Mean = 10.19 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 73.94 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 23.96 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 16.40 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75159  Mean = 53.84 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 12.59 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75147  Mean = 13.68 
 % Relative Standard Deviation = 0.6 
 Number of Observations = 3 
 Blind Sample ID = 25DIW-75143  Mean = 43.90 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 50.30 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 120.78 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 25.62 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147  Mean = 39.57 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 18.95 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 6 
 Blind Sample ID = 25147-75145  Mean = 18.20 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 4 
 Blind Sample ID = 25145-75147
The SGPlot Procedure



- Mercury, FIL,CVAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 71890, MCode: CV013
Dates: 10/14/86 through 03/23/01
Open Data Set

 Mean = 0.82 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 29 
 Blind Sample ID = ST97  Mean = 0.46 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 16 
 Blind Sample ID = ST95  Mean = 3.25 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 4 
 Blind Sample ID = ST85  Mean = 0.52 
 % Relative Standard Deviation = 83.4 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25155  Mean = 1.46 
 % Relative Standard Deviation = 50.0 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25151  Mean = 0.87 
 % Relative Standard Deviation = 84.4 
 Number of Observations = 20 
 Blind Sample ID = 75DIW-25139  Mean = 1.09 
 % Relative Standard Deviation = 149.6 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25137  Mean = 2.26 
 % Relative Standard Deviation = 46.6 
 Number of Observations = 34 
 Blind Sample ID = 67DW-33113  Mean = 0.17 
 % Relative Standard Deviation = 30.4 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50123  Mean = 0.71 
 % Relative Standard Deviation = 14.1 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50121  Mean = 0.81 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 30 
 Blind Sample ID = 50DW-50115  Mean = 0.65 
 % Relative Standard Deviation = 107.3 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 1.01 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 6 
 Blind Sample ID = 50DIW-50143  Mean = 2.13 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 3.40 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50137  Mean = 0.89 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 0.32 
 % Relative Standard Deviation = 33.1 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50133  Mean = 0.14 
 % Relative Standard Deviation = 35.5 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50123  Mean = 0.42 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 0.70 
 % Relative Standard Deviation = 25.5 
 Number of Observations = 26 
 Blind Sample ID = 50139-50141  Mean = 0.58 
 % Relative Standard Deviation = 59.3 
 Number of Observations = 8 
 Blind Sample ID = 50137-50139  Mean = 1.79 
 % Relative Standard Deviation = 32.0 
 Number of Observations = 23 
 Blind Sample ID = 50135-50139  Mean = 0.16 
 % Relative Standard Deviation = 31.8 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 0.79 
 % Relative Standard Deviation = 30.7 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 0.81 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 0.11 
 % Relative Standard Deviation = 30.4 
 Number of Observations = 16 
 Blind Sample ID = 5011/50DW  Mean = 1.50 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 2.34 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 31 
 Blind Sample ID = 5007/50DW  Mean = 2.81 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 13 
 Blind Sample ID = 5007/5003  Mean = 0.28 
 % Relative Standard Deviation = 194.5 
 Number of Observations = 17 
 Blind Sample ID = 5003/50DW  Mean = 0.67 
 % Relative Standard Deviation = 22.9 
 Number of Observations = 3 
 Blind Sample ID = 5003/5097  Mean = 0.34 
 % Relative Standard Deviation = 84.7 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 0.53 
 % Relative Standard Deviation = 34.0 
 Number of Observations = 39 
 Blind Sample ID = 33DW/6797  Mean = 0.11 
 % Relative Standard Deviation = 21.0 
 Number of Observations = 40 
 Blind Sample ID = 33DW/6793  Mean = 2.47 
 % Relative Standard Deviation = 39.8 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6785  Mean = 0.19 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6709  Mean = 1.77 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 15 
 Blind Sample ID = 33DW/6707  Mean = 2.87 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6705  Mean = 0.49 
 % Relative Standard Deviation = 68.7 
 Number of Observations = 42 
 Blind Sample ID = 33DW/6703  Mean = 0.82 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 6 
 Blind Sample ID = 33DW-67123  Mean = 0.80 
 % Relative Standard Deviation = 81.4 
 Number of Observations = 46 
 Blind Sample ID = 33DW-67121  Mean = 2.70 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 0.20 
 % Relative Standard Deviation = 21.0 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67105  Mean = 0.29 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67103  Mean = 1.21 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 29 
 Blind Sample ID = 33DIW-67135  Mean = 1.12 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 33 
 Blind Sample ID = 33DIW-67131  Mean = 2.65 
 % Relative Standard Deviation = 55.0 
 Number of Observations = 45 
 Blind Sample ID = 33DIW-67127  Mean = 0.12 
 % Relative Standard Deviation = 33.4 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 1.43 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 17 
 Blind Sample ID = 3305/67DW  Mean = 0.46 
 % Relative Standard Deviation = 56.1 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 0.22 
 % Relative Standard Deviation = 35.2 
 Number of Observations = 15 
 Blind Sample ID = 25DW/7595  Mean = 1.88 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7507  Mean = 0.71 
 % Relative Standard Deviation = 57.8 
 Number of Observations = 38 
 Blind Sample ID = 25DW/7503  Mean = 0.76 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75121  Mean = 1.75 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 31 
 Blind Sample ID = 25DW-75105  Mean = 1.58 
 % Relative Standard Deviation = 53.5 
 Number of Observations = 24 
 Blind Sample ID = 25DW-75103  Mean = 0.74 
 % Relative Standard Deviation = 51.5 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75159  Mean = 0.31 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 0.98 
 % Relative Standard Deviation = 45.9 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75147  Mean = 0.56 
 % Relative Standard Deviation = 51.3 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 0.67 
 % Relative Standard Deviation = 23.2 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 0.46 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 0.85 
 % Relative Standard Deviation = 57.8 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 1.30 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 4 
 Blind Sample ID = 25159-75155  Mean = 1.38 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 1.18 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 3 
 Blind Sample ID = 25155-75157  Mean = 0.51 
 % Relative Standard Deviation = 78.4 
 Number of Observations = 8 
 Blind Sample ID = 25155-75147  Mean = 0.52 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 0.71 
 % Relative Standard Deviation = 94.0 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 1.05 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 2.85 
 % Relative Standard Deviation = 46.5 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137  Mean = 0.39 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 0.13 
 % Relative Standard Deviation = 36.9 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 0.87 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504
The SGPlot Procedure



- Mercury, UNF,CVAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 71900, MCode: CV016
Dates: 02/17/87 through 03/23/01
Open Data Set

 Mean = 0.14 
 % Relative Standard Deviation = 67.8 
 Number of Observations = 11 
 Blind Sample ID = ST99  Mean = 1.17 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 4 
 Blind Sample ID = 75DIW-25155  Mean = 1.37 
 % Relative Standard Deviation = 31.6 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25151  Mean = 2.27 
 % Relative Standard Deviation = 46.9 
 Number of Observations = 34 
 Blind Sample ID = 67DW-33113  Mean = 1.04 
 % Relative Standard Deviation = 64.7 
 Number of Observations = 25 
 Blind Sample ID = 50DW/5001  Mean = 0.73 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 1.70 
 % Relative Standard Deviation = 18.1 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50117  Mean = 2.68 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 1.77 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 6 
 Blind Sample ID = 50DIW-50145  Mean = 0.96 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 7 
 Blind Sample ID = 50DIW-50143  Mean = 1.95 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 3.28 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 6 
 Blind Sample ID = 50DIW-50137  Mean = 0.90 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 6 
 Blind Sample ID = 50DIW-50135  Mean = 0.98 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 6 
 Blind Sample ID = 50143-50145  Mean = 3.36 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 7 
 Blind Sample ID = 50139-50145  Mean = 1.96 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 6 
 Blind Sample ID = 50137-50141  Mean = 0.93 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 0.42 
 % Relative Standard Deviation = 35.2 
 Number of Observations = 13 
 Blind Sample ID = 50125-50133  Mean = 0.44 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 28 
 Blind Sample ID = 50125-50123  Mean = 0.18 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 0.66 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 0.81 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 1.45 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 0.31 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 8 
 Blind Sample ID = 50101-50115  Mean = 2.66 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 14 
 Blind Sample ID = 5007/5003  Mean = 0.60 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 1.63 
 % Relative Standard Deviation = 21.9 
 Number of Observations = 9 
 Blind Sample ID = 5001/5011  Mean = 2.55 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 1.19 
 % Relative Standard Deviation = 116.2 
 Number of Observations = 10 
 Blind Sample ID = 5001/5003  Mean = 0.13 
 % Relative Standard Deviation = 43.3 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6799  Mean = 0.20 
 % Relative Standard Deviation = 21.3 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6709  Mean = 2.85 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6705  Mean = 0.75 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 6 
 Blind Sample ID = 33DW-67123  Mean = 1.73 
 % Relative Standard Deviation = 21.7 
 Number of Observations = 14 
 Blind Sample ID = 33DW-67121  Mean = 2.69 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 1.09 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 8 
 Blind Sample ID = 33DIW-67135  Mean = 0.98 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 1.33 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 19 
 Blind Sample ID = 3305/67DW  Mean = 2.82 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7507  Mean = 0.63 
 % Relative Standard Deviation = 141.0 
 Number of Observations = 8 
 Blind Sample ID = 25DW/7503  Mean = 3.06 
 % Relative Standard Deviation = 20.1 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75113  Mean = 1.01 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 14 
 Blind Sample ID = 25DW-75105  Mean = 0.42 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75159  Mean = 0.30 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 0.96 
 % Relative Standard Deviation = 34.4 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75147  Mean = 0.48 
 % Relative Standard Deviation = 59.3 
 Number of Observations = 15 
 Blind Sample ID = 25DIW-75143  Mean = 0.54 
 % Relative Standard Deviation = 39.9 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 0.48 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 2.21 
 % Relative Standard Deviation = 57.1 
 Number of Observations = 14 
 Blind Sample ID = 25DIW-75127  Mean = 1.28 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 4 
 Blind Sample ID = 25159-75155  Mean = 1.11 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 4 
 Blind Sample ID = 25155-75157  Mean = 0.21 
 % Relative Standard Deviation = 23.9 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147  Mean = 0.57 
 % Relative Standard Deviation = 22.2 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 0.27 
 % Relative Standard Deviation = 30.0 
 Number of Observations = 7 
 Blind Sample ID = 25147-75145  Mean = 0.95 
 % Relative Standard Deviation = 24.7 
 Number of Observations = 7 
 Blind Sample ID = 25145-75147  Mean = 0.44 
 % Relative Standard Deviation = 48.8 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 0.22 
 % Relative Standard Deviation = 28.1 
 Number of Observations = 7 
 Blind Sample ID = 25139-75137  Mean = 0.33 
 % Relative Standard Deviation = 33.9 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 0.13 
 % Relative Standard Deviation = 36.9 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Molybdenum, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01060, MCode: GF080
Dates: 11/09/94 through 09/19/01
Open Data Set

 Mean = 6.63 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25155  Mean = 7.67 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25151  Mean = 2.50 
 % Relative Standard Deviation = 31.0 
 Number of Observations = 5 
 Blind Sample ID = 75DIW-25137  Mean = 4.79 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 4 
 Blind Sample ID = 50DIW-50145  Mean = 23.00 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 18 
 Blind Sample ID = 50DIW-50133  Mean = 4.45 
 % Relative Standard Deviation = 22.0 
 Number of Observations = 17 
 Blind Sample ID = 50DIW-50123  Mean = 6.68 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 12.62 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 5 
 Blind Sample ID = 50137-50139  Mean = 43.57 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 14 
 Blind Sample ID = 33DIW-67135  Mean = 75.08 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 1.13 
 % Relative Standard Deviation = 25.7 
 Number of Observations = 24 
 Blind Sample ID = 33DIW-67127  Mean = 31.53 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75159  Mean = 7.88 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75147  Mean = 34.95 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159
The SGPlot Procedure



- Molybdenum, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01060, MCode: PLM43
Dates: 02/07/94 through 09/27/01
Open Data Set

 Mean = 7.06 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 34 
 Blind Sample ID = GT3  Mean = 6.59 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25155  Mean = 3.94 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 2.28 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 32 
 Blind Sample ID = 75DIW-25137  Mean = 4.56 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 18.63 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 31.94 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 6.82 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 12.31 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 34.20 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 27 
 Blind Sample ID = 50143-50151  Mean = 23.02 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 36.27 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 33.73 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 14.06 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 31 
 Blind Sample ID = 50125-50123  Mean = 35.23 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 126.93 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 27.30 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 11.40 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 5.46 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 30.88 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Molybdenum, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01060, MCode: PLA11
Dates: 10/14/86 through 08/23/01
Open Data Set

 Mean = 36.00 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 21.25 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 35.00 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 12.35 
 % Relative Standard Deviation = 35.4 
 Number of Observations = 17 
 Blind Sample ID = 67DW-33113  Mean = 15.60 
 % Relative Standard Deviation = 32.5 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 21.94 
 % Relative Standard Deviation = 21.8 
 Number of Observations = 31 
 Blind Sample ID = 5097/5099  Mean = 38.33 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 24 
 Blind Sample ID = 5097/5001  Mean = 12.93 
 % Relative Standard Deviation = 39.6 
 Number of Observations = 41 
 Blind Sample ID = 5093/5087  Mean = 31.35 
 % Relative Standard Deviation = 17.2 
 Number of Observations = 9 
 Blind Sample ID = 50143-50151  Mean = 18.25 
 % Relative Standard Deviation = 67.5 
 Number of Observations = 5 
 Blind Sample ID = 50143-50145  Mean = 13.76 
 % Relative Standard Deviation = 36.9 
 Number of Observations = 4 
 Blind Sample ID = 50139-50145  Mean = 10.05 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 36.15 
 % Relative Standard Deviation = 22.2 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 69.17 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 42.40 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 10.83 
 % Relative Standard Deviation = 26.1 
 Number of Observations = 24 
 Blind Sample ID = 50123-50121  Mean = 13.33 
 % Relative Standard Deviation = 42.3 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 17.27 
 % Relative Standard Deviation = 28.9 
 Number of Observations = 44 
 Blind Sample ID = 50121-50105  Mean = 39.57 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 47 
 Blind Sample ID = 50115-50103  Mean = 11.02 
 % Relative Standard Deviation = 27.8 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 15.63 
 % Relative Standard Deviation = 32.1 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 40.87 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 24.40 
 % Relative Standard Deviation = 29.2 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 30.33 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 60 
 Blind Sample ID = 5007/5001  Mean = 32.63 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 19 
 Blind Sample ID = 5003/5097  Mean = 41.11 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 24.44 
 % Relative Standard Deviation = 20.7 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6797  Mean = 12.89 
 % Relative Standard Deviation = 35.6 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 10.50 
 % Relative Standard Deviation = 21.3 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 22.31 
 % Relative Standard Deviation = 29.2 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6703  Mean = 28.00 
 % Relative Standard Deviation = 17.9 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 12.14 
 % Relative Standard Deviation = 47.7 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7511  Mean = 24.21 
 % Relative Standard Deviation = 28.6 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 10.87 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75121  Mean = 23.11 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75151  Mean = 47.06 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 17 
 Blind Sample ID = 25DIW-75135  Mean = 85.56 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 35.63 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 32.94 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 11 
 Blind Sample ID = 25157-75159  Mean = 121.90 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 12 
 Blind Sample ID = 25155-75153  Mean = 21.95 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 5 
 Blind Sample ID = 25155-75147  Mean = 13.96 
 % Relative Standard Deviation = 36.4 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 13.73 
 % Relative Standard Deviation = 44.4 
 Number of Observations = 6 
 Blind Sample ID = 25139-75137  Mean = 14.38 
 % Relative Standard Deviation = 43.8 
 Number of Observations = 16 
 Blind Sample ID = 25133-75127  Mean = 15.71 
 % Relative Standard Deviation = 44.8 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 10.98 
 % Relative Standard Deviation = 27.4 
 Number of Observations = 41 
 Blind Sample ID = 25125-75127  Mean = 29.35 
 % Relative Standard Deviation = 23.2 
 Number of Observations = 46 
 Blind Sample ID = 25125-75113  Mean = 10.42 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 27.80 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 41 
 Blind Sample ID = 25117-75113  Mean = 34.87 
 % Relative Standard Deviation = 14.5 
 Number of Observations = 39 
 Blind Sample ID = 25101-75113  Mean = 61.33 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 41.74 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501  Mean = 19.44 
 % Relative Standard Deviation = 32.9 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 92.77 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 26.15 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 82.00 
 % Relative Standard Deviation = 49.8 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Molybdenum, FIL,CXAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01060, MCode: CX009
Dates: 10/14/86 through 10/27/94
Open Data Set

 Mean = 3.91 
 % Relative Standard Deviation = 38.1 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50123  Mean = 5.66 
 % Relative Standard Deviation = 24.0 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50121  Mean = 23.19 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 31 
 Blind Sample ID = 50DW-50115  Mean = 15.36 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 11 
 Blind Sample ID = 5097/50DW  Mean = 4.60 
 % Relative Standard Deviation = 79.3 
 Number of Observations = 5 
 Blind Sample ID = 5095/50DW  Mean = 5.60 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 6.48 
 % Relative Standard Deviation = 17.8 
 Number of Observations = 31 
 Blind Sample ID = 5007/50DW  Mean = 22.74 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 27 
 Blind Sample ID = 5007/5003  Mean = 17.15 
 % Relative Standard Deviation = 25.3 
 Number of Observations = 33 
 Blind Sample ID = 5003/50DW  Mean = 42.40 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 5 
 Blind Sample ID = 5003/5001  Mean = 7.40 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 21.83 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6797  Mean = 2.25 
 % Relative Standard Deviation = 42.6 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6787  Mean = 8.60 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 15 
 Blind Sample ID = 33DW/6707  Mean = 24.07 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 15 
 Blind Sample ID = 33DW/6703  Mean = 7.91 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 32 
 Blind Sample ID = 33DW-67121  Mean = 14.17 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67105  Mean = 24.30 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67103  Mean = 1.75 
 % Relative Standard Deviation = 85.7 
 Number of Observations = 4 
 Blind Sample ID = 33DIW-67127  Mean = 7.57 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7599  Mean = 23.23 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7597  Mean = 16.30 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575  Mean = 10.15 
 % Relative Standard Deviation = 15.5 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7507  Mean = 26.33 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 24 
 Blind Sample ID = 25DW/7503  Mean = 8.79 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 33 
 Blind Sample ID = 25DW-75121  Mean = 17.03 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 31 
 Blind Sample ID = 25DW-75105  Mean = 27.28 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75103  Mean = 23.33 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504  Mean = 25.73 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 11 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Molybdenum, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01062, MCode: GF095
Dates: 11/07/94 through 09/14/01
Open Data Set

 Mean = 6.13 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 4 
 Blind Sample ID = 75DIW-25155  Mean = 7.04 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25151  Mean = 4.14 
 % Relative Standard Deviation = 32.0 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 6.14 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 12.64 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 22.63 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 8 
 Blind Sample ID = 50143-50145  Mean = 11.30 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 7 
 Blind Sample ID = 50139-50145  Mean = 32.23 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 13 
 Blind Sample ID = 50125-50133  Mean = 13.62 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 13 
 Blind Sample ID = 50125-50123  Mean = 7.73 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75147  Mean = 1.08 
 % Relative Standard Deviation = 23.7 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75127  Mean = 28.89 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 13.09 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147  Mean = 8.83 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 9.60 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137
The SGPlot Procedure



- Molybdenum, UNF,CXAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01062, MCode: CX018
Dates: 10/14/86 through 10/28/94
Open Data Set

 Mean = 3.38 
 % Relative Standard Deviation = 57.0 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 74.67 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 3 
 Blind Sample ID = STS1  Mean = 12.17 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 6 
 Blind Sample ID = ST99  Mean = 15.61 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 20.37 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 19 
 Blind Sample ID = 50DW/5001  Mean = 9.00 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 4.58 
 % Relative Standard Deviation = 21.7 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50117  Mean = 21.33 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 12.14 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 14 
 Blind Sample ID = 50125-50123  Mean = 11.00 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 40.18 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 26.50 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 10 
 Blind Sample ID = 5001/5011  Mean = 28.50 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 36.80 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 10 
 Blind Sample ID = 5001/5003  Mean = 9.00 
 % Relative Standard Deviation = 25.8 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7511  Mean = 9.36 
 % Relative Standard Deviation = 17.4 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7507  Mean = 23.38 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 8 
 Blind Sample ID = 25DW/7503  Mean = 21.33 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 24 
 Blind Sample ID = 25DW-75113  Mean = 14.64 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 14 
 Blind Sample ID = 25DW-75105
The SGPlot Procedure



- Nickel, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01065, MCode: CX010
Dates: 10/14/86 through 05/08/89
Open Data Set

 Mean = 4.13 
 % Relative Standard Deviation = 58.6 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 11.79 
 % Relative Standard Deviation = 28.6 
 Number of Observations = 29 
 Blind Sample ID = ST97  Mean = 1.82 
 % Relative Standard Deviation = 58.9 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 2.62 
 % Relative Standard Deviation = 74.1 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 4.73 
 % Relative Standard Deviation = 41.3 
 Number of Observations = 11 
 Blind Sample ID = 5097/50DW  Mean = 7.40 
 % Relative Standard Deviation = 33.9 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 1.40 
 % Relative Standard Deviation = 63.9 
 Number of Observations = 5 
 Blind Sample ID = 5095/50DW  Mean = 2.25 
 % Relative Standard Deviation = 42.6 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 3.65 
 % Relative Standard Deviation = 65.7 
 Number of Observations = 17 
 Blind Sample ID = 5003/50DW  Mean = 4.17 
 % Relative Standard Deviation = 79.5 
 Number of Observations = 6 
 Blind Sample ID = 33DW/6799  Mean = 7.59 
 % Relative Standard Deviation = 27.9 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6797  Mean = 7.62 
 % Relative Standard Deviation = 33.1 
 Number of Observations = 53 
 Blind Sample ID = 33DW/6793  Mean = 3.25 
 % Relative Standard Deviation = 52.5 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6787  Mean = 4.60 
 % Relative Standard Deviation = 41.2 
 Number of Observations = 10 
 Blind Sample ID = 33DW/6785  Mean = 2.33 
 % Relative Standard Deviation = 65.5 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 3.14 
 % Relative Standard Deviation = 62.1 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7599  Mean = 9.62 
 % Relative Standard Deviation = 26.0 
 Number of Observations = 29 
 Blind Sample ID = 25DW/7597  Mean = 2.32 
 % Relative Standard Deviation = 45.6 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  Mean = 9.20 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575
The SGPlot Procedure



- Nickel, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01065, MCode: GF090
Dates: 05/15/89 through 09/19/01
Open Data Set

 Mean = 2.34 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25155  Mean = 2.86 
 % Relative Standard Deviation = 40.2 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25151  Mean = 3.40 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 22 
 Blind Sample ID = 75DIW-25139  Mean = 4.20 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 5 
 Blind Sample ID = 75DIW-25137  Mean = 1.13 
 % Relative Standard Deviation = 30.0 
 Number of Observations = 24 
 Blind Sample ID = 67DW-33113  Mean = 2.06 
 % Relative Standard Deviation = 21.1 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50123  Mean = 4.44 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 32 
 Blind Sample ID = 50DW-50121  Mean = 8.97 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 31 
 Blind Sample ID = 50DW-50115  Mean = 5.45 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 4 
 Blind Sample ID = 50DIW-50145  Mean = 37.63 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 6 
 Blind Sample ID = 50DIW-50143  Mean = 6.96 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 7.90 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 4 
 Blind Sample ID = 50DIW-50137  Mean = 33.01 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 14.42 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50133  Mean = 2.42 
 % Relative Standard Deviation = 20.8 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50123  Mean = 16.26 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 16.11 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 26 
 Blind Sample ID = 50139-50141  Mean = 14.90 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 5 
 Blind Sample ID = 50137-50139  Mean = 40.53 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 23 
 Blind Sample ID = 50135-50139  Mean = 6.50 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 13.13 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 12.25 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 7.73 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 21.27 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 15 
 Blind Sample ID = 5011/5007  Mean = 12.29 
 % Relative Standard Deviation = 19.5 
 Number of Observations = 31 
 Blind Sample ID = 5007/50DW  Mean = 16.00 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 41 
 Blind Sample ID = 5007/5003  Mean = 4.19 
 % Relative Standard Deviation = 59.3 
 Number of Observations = 16 
 Blind Sample ID = 5003/50DW  Mean = 6.50 
 % Relative Standard Deviation = 56.9 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 17.17 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 12 
 Blind Sample ID = 5003/5001  Mean = 3.00 
 % Relative Standard Deviation = 72.0 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6799  Mean = 6.50 
 % Relative Standard Deviation = 27.4 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6797  Mean = 10.20 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  Mean = 39.69 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 17.77 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 31 
 Blind Sample ID = 33DW/6707  Mean = 10.82 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6705  Mean = 5.53 
 % Relative Standard Deviation = 27.2 
 Number of Observations = 17 
 Blind Sample ID = 33DW/6703  Mean = 3.00 
 % Relative Standard Deviation = 17.8 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 5.96 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 46 
 Blind Sample ID = 33DW-67121  Mean = 11.35 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 11.57 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67105  Mean = 4.60 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 30 
 Blind Sample ID = 33DW-67103  Mean = 44.76 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 29 
 Blind Sample ID = 33DIW-67135  Mean = 40.17 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 36 
 Blind Sample ID = 33DIW-67131  Mean = 6.02 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 45 
 Blind Sample ID = 33DIW-67127  Mean = 2.33 
 % Relative Standard Deviation = 65.5 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 18.75 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 5.26 
 % Relative Standard Deviation = 21.8 
 Number of Observations = 19 
 Blind Sample ID = 3305/67DW  Mean = 7.11 
 % Relative Standard Deviation = 19.2 
 Number of Observations = 9 
 Blind Sample ID = 25DW/7597  Mean = 11.33 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 15 
 Blind Sample ID = 25DW/7511  Mean = 16.94 
 % Relative Standard Deviation = 38.6 
 Number of Observations = 17 
 Blind Sample ID = 25DW/7507  Mean = 6.21 
 % Relative Standard Deviation = 34.6 
 Number of Observations = 24 
 Blind Sample ID = 25DW/7503  Mean = 6.94 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 33 
 Blind Sample ID = 25DW-75121  Mean = 13.52 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 31 
 Blind Sample ID = 25DW-75105  Mean = 4.84 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75103  Mean = 17.18 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 6 
 Blind Sample ID = 25DIW-75159  Mean = 10.82 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75147  Mean = 50.96 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 44.25 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 24.74 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 13.86 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 7.83 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 5.33 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504  Mean = 41.60 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 26.27 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 15 
 Blind Sample ID = 2505/7501  Mean = 18.56 
 % Relative Standard Deviation = 16.8 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505  Mean = 34.67 
 % Relative Standard Deviation = 46.6 
 Number of Observations = 3 
 Blind Sample ID =
The SGPlot Procedure



- Nickel, FIL, GFAA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01065, MCode: GF081
Dates: 11/24/89 through 09/30/92
Open Data Set

 Mean = 2.63 
 % Relative Standard Deviation = 76.0 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25103  Mean = 4.38 
 % Relative Standard Deviation = 32.2 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50103  Mean = 17.00 
 % Relative Standard Deviation = 27.2 
 Number of Observations = 16 
 Blind Sample ID = 5001/50DW  Mean = 33.33 
 % Relative Standard Deviation = 24.4 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7507  Mean = 14.14 
 % Relative Standard Deviation = 25.6 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7505  Mean = 6.63 
 % Relative Standard Deviation = 22.7 
 Number of Observations = 8 
 Blind Sample ID = 25DW-75103  Mean = 9.17 
 % Relative Standard Deviation = 31.9 
 Number of Observations = 6 
 Blind Sample ID = 2501/75DW
The SGPlot Procedure



- Nickel, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01065, MCode: PLM43
Dates: 02/07/94 through 09/27/01
Open Data Set

 Mean = 36.36 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 34 
 Blind Sample ID = GT3  Mean = 2.17 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25155  Mean = 3.43 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 4.02 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 32 
 Blind Sample ID = 75DIW-25137  Mean = 2.94 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25125  Mean = 5.60 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 35.16 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 32.58 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 15.29 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 3.89 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 39.67 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 28 
 Blind Sample ID = 50143-50151  Mean = 39.63 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 39.80 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 19.33 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 7.59 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 32 
 Blind Sample ID = 50125-50123  Mean = 24.37 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 26.12 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 8.65 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 13.05 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 9.26 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 4.75 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Nickel, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01065, MCode: PLA11
Dates: 08/10/87 through 08/02/01
Open Data Set

 Mean = 11.11 
 % Relative Standard Deviation = 28.7 
 Number of Observations = 36 
 Blind Sample ID = ST97  Mean = 10.40 
 % Relative Standard Deviation = 19.2 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 10.33 
 % Relative Standard Deviation = 17.7 
 Number of Observations = 30 
 Blind Sample ID = 5097/5099  Mean = 18.80 
 % Relative Standard Deviation = 28.0 
 Number of Observations = 25 
 Blind Sample ID = 5097/5001  Mean = 39.55 
 % Relative Standard Deviation = 18.0 
 Number of Observations = 22 
 Blind Sample ID = 50143-50151  Mean = 45.60 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 15 
 Blind Sample ID = 50143-50145  Mean = 15.31 
 % Relative Standard Deviation = 22.4 
 Number of Observations = 4 
 Blind Sample ID = 50139-50145  Mean = 16.17 
 % Relative Standard Deviation = 33.8 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 41.67 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 33.75 
 % Relative Standard Deviation = 23.4 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 39.20 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 10.42 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 24 
 Blind Sample ID = 50123-50121  Mean = 10.42 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 11.59 
 % Relative Standard Deviation = 31.9 
 Number of Observations = 44 
 Blind Sample ID = 50121-50105  Mean = 12.34 
 % Relative Standard Deviation = 34.7 
 Number of Observations = 47 
 Blind Sample ID = 50115-50103  Mean = 21.22 
 % Relative Standard Deviation = 22.8 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 12.92 
 % Relative Standard Deviation = 35.6 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 19.35 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 17.20 
 % Relative Standard Deviation = 35.7 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 29.67 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 60 
 Blind Sample ID = 5007/5001  Mean = 11.05 
 % Relative Standard Deviation = 28.5 
 Number of Observations = 19 
 Blind Sample ID = 5003/5097  Mean = 18.89 
 % Relative Standard Deviation = 21.1 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 15.00 
 % Relative Standard Deviation = 38.5 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6707  Mean = 27.50 
 % Relative Standard Deviation = 42.4 
 Number of Observations = 8 
 Blind Sample ID = 25DW/7507  Mean = 21.61 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 3 
 Blind Sample ID = 25DIW-75151  Mean = 50.00 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 17 
 Blind Sample ID = 25DIW-75135  Mean = 43.33 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 29.52 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 30.96 
 % Relative Standard Deviation = 17.0 
 Number of Observations = 10 
 Blind Sample ID = 25155-75153  Mean = 24.92 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 5 
 Blind Sample ID = 25147-75145  Mean = 16.26 
 % Relative Standard Deviation = 28.0 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 18.81 
 % Relative Standard Deviation = 58.1 
 Number of Observations = 6 
 Blind Sample ID = 25139-75137  Mean = 13.75 
 % Relative Standard Deviation = 36.4 
 Number of Observations = 16 
 Blind Sample ID = 25133-75127  Mean = 11.67 
 % Relative Standard Deviation = 32.3 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 11.95 
 % Relative Standard Deviation = 38.4 
 Number of Observations = 41 
 Blind Sample ID = 25125-75127  Mean = 27.14 
 % Relative Standard Deviation = 18.0 
 Number of Observations = 7 
 Blind Sample ID = 2505/7501  Mean = 13.33 
 % Relative Standard Deviation = 44.6 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 51.70 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 17.69 
 % Relative Standard Deviation = 24.8 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 40.00 
 % Relative Standard Deviation = 30.6 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Nickel, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01067, MCode: CX019
Dates: 10/14/86 through 04/27/89
Open Data Set

 Mean = 12.38 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 20.67 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 3 
 Blind Sample ID = STS1  Mean = 5.64 
 % Relative Standard Deviation = 27.5 
 Number of Observations = 14 
 Blind Sample ID = ST99  Mean = 13.22 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 15.50 
 % Relative Standard Deviation = 28.6 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5001  Mean = 9.80 
 % Relative Standard Deviation = 22.1 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 1.50 
 % Relative Standard Deviation = 66.7 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 19.29 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 7 
 Blind Sample ID = 5001/5003  Mean = 9.25 
 % Relative Standard Deviation = 33.1 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 4.44 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 3.50 
 % Relative Standard Deviation = 36.9 
 Number of Observations = 4 
 Blind Sample ID = 3399/67DW  Mean = 6.60 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7503
The SGPlot Procedure



- Nickel, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01067, MCode: GF101
Dates: 05/08/89 through 09/24/01
Open Data Set

 Mean = 2.28 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 4 
 Blind Sample ID = 75DIW-25155  Mean = 2.73 
 % Relative Standard Deviation = 16.8 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25151  Mean = 1.21 
 % Relative Standard Deviation = 34.3 
 Number of Observations = 24 
 Blind Sample ID = 67DW-33113  Mean = 15.33 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  Mean = 6.25 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 5.08 
 % Relative Standard Deviation = 27.1 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50117  Mean = 15.33 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 5.94 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 37.50 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 6.78 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 8.21 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50137  Mean = 33.03 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 15.27 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 3.86 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 42.73 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 7 
 Blind Sample ID = 50143-50145  Mean = 12.54 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 16.26 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 40.91 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 19.54 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 13 
 Blind Sample ID = 50125-50133  Mean = 8.43 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 28 
 Blind Sample ID = 50125-50123  Mean = 7.13 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 13.81 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 9.30 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 12.44 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 23.67 
 % Relative Standard Deviation = 19.8 
 Number of Observations = 12 
 Blind Sample ID = 5011/5007  Mean = 25.64 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 16.93 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 14 
 Blind Sample ID = 5007/5003  Mean = 9.25 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 23.00 
 % Relative Standard Deviation = 16.5 
 Number of Observations = 10 
 Blind Sample ID = 5001/5011  Mean = 29.00 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 18.00 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 3 
 Blind Sample ID = 5001/5003  Mean = 4.60 
 % Relative Standard Deviation = 58.7 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 38.92 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 11.95 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6705  Mean = 6.79 
 % Relative Standard Deviation = 27.8 
 Number of Observations = 14 
 Blind Sample ID = 33DW-67121  Mean = 11.24 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 43.25 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 8 
 Blind Sample ID = 33DIW-67135  Mean = 41.83 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 3.33 
 % Relative Standard Deviation = 45.8 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 20.50 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 5.93 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 15 
 Blind Sample ID = 3305/67DW  Mean = 13.09 
 % Relative Standard Deviation = 42.5 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7511  Mean = 19.15 
 % Relative Standard Deviation = 20.1 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7507  Mean = 6.00 
 % Relative Standard Deviation = 16.7 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7503  Mean = 2.25 
 % Relative Standard Deviation = 30.0 
 Number of Observations = 24 
 Blind Sample ID = 25DW-75113  Mean = 13.29 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 14 
 Blind Sample ID = 25DW-75105  Mean = 16.18 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75159  Mean = 24.26 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 10.30 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75147  Mean = 55.05 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 15 
 Blind Sample ID = 25DIW-75143  Mean = 49.68 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 43.18 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 11 
 Blind Sample ID = 25DIW-75131  Mean = 7.00 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75127  Mean = 11.15 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 6 
 Blind Sample ID = 25159-75155  Mean = 24.05 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 24.34 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 11.30 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147  Mean = 8.43 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 11.64 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 12.28 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 14.44 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 15.34 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137  Mean = 13.86 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 8.17 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Selenium, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01145, MCode: GF091
Dates: 10/05/98 through 09/28/01
Open Data Set

 Mean = 11.53 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 34 
 Blind Sample ID = GT3  Mean = 2.35 
 % Relative Standard Deviation = 25.6 
 Number of Observations = 24 
 Blind Sample ID = 75DIW-25155  Mean = 5.47 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 36 
 Blind Sample ID = 50DIW-50145  Mean = 2.31 
 % Relative Standard Deviation = 18.0 
 Number of Observations = 31 
 Blind Sample ID = 50157-50DIW  Mean = 4.17 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 6.12 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 4 
 Blind Sample ID = 50147-50151  Mean = 10.48 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 4 
 Blind Sample ID = 50145-50147  Mean = 4.91 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 28 
 Blind Sample ID = 50143-50151  Mean = 4.13 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 20 
 Blind Sample ID = 25DIW-75159  Mean = 7.56 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 8.46 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75147  Mean = 7.69 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75143  Mean = 7.93 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 11 
 Blind Sample ID = 25159-75155  Mean = 5.04 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 31 
 Blind Sample ID = 25157-75159  Mean = 5.50 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 12 
 Blind Sample ID = 25155-75157  Mean = 9.64 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 2.36 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 4 
 Blind Sample ID = 25155-75151  Mean = 10.62 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 8 
 Blind Sample ID = 25155-75147  Mean = 6.52 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 28 
 Blind Sample ID = 25151-75155  Mean = 7.04 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 4 
 Blind Sample ID = 25151-75153  Mean = 9.02 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 4 
 Blind Sample ID = 25151-75147  Mean = 7.43 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 4 
 Blind Sample ID = 25151-75143  Mean = 10.23 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 10.71 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 34 
 Blind Sample ID = 25145-75147
The SGPlot Procedure



- Selenium, FIL, Hydride, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01145, MCode: HY011
Dates: 10/14/86 through 09/30/98
Open Data Set

 Mean = 11.25 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 16.38 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 29 
 Blind Sample ID = ST97  Mean = 67.13 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 16 
 Blind Sample ID = ST95  Mean = 3.46 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 1.18 
 % Relative Standard Deviation = 25.3 
 Number of Observations = 22 
 Blind Sample ID = 75DIW-25139  Mean = 6.59 
 % Relative Standard Deviation = 24.5 
 Number of Observations = 39 
 Blind Sample ID = 67DW-33113  Mean = 4.88 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 16 
 Blind Sample ID = 50DW-50125  Mean = 2.75 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 16 
 Blind Sample ID = 50DW-50117  Mean = 4.59 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 2.33 
 % Relative Standard Deviation = 20.9 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 4.19 
 % Relative Standard Deviation = 36.1 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 10.46 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50133  Mean = 2.75 
 % Relative Standard Deviation = 19.3 
 Number of Observations = 24 
 Blind Sample ID = 50DIW-50123  Mean = 13.20 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 36.00 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 9.95 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 18 
 Blind Sample ID = 50143-50145  Mean = 7.58 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 21 
 Blind Sample ID = 50139-50145  Mean = 6.22 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 50 
 Blind Sample ID = 50139-50141  Mean = 4.83 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 4 
 Blind Sample ID = 50137-50143  Mean = 2.54 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 12 
 Blind Sample ID = 50137-50139  Mean = 7.06 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 47 
 Blind Sample ID = 50135-50139  Mean = 13.64 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 14 
 Blind Sample ID = 50125-50133  Mean = 7.10 
 % Relative Standard Deviation = 16.8 
 Number of Observations = 40 
 Blind Sample ID = 50125-50123  Mean = 6.00 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 7.00 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 7.69 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 13 
 Blind Sample ID = 50117-50121  Mean = 3.44 
 % Relative Standard Deviation = 30.0 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 7.64 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 15.80 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 15 
 Blind Sample ID = 50107-50113  Mean = 9.50 
 % Relative Standard Deviation = 26.1 
 Number of Observations = 16 
 Blind Sample ID = 50101-50107  Mean = 7.29 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 14 
 Blind Sample ID = 5007/5003  Mean = 7.25 
 % Relative Standard Deviation = 57.8 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 4.33 
 % Relative Standard Deviation = 23.3 
 Number of Observations = 39 
 Blind Sample ID = 5003/5005  Mean = 7.00 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 11.30 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6797  Mean = 3.72 
 % Relative Standard Deviation = 22.0 
 Number of Observations = 53 
 Blind Sample ID = 33DW/6793  Mean = 2.80 
 % Relative Standard Deviation = 28.2 
 Number of Observations = 10 
 Blind Sample ID = 33DW/6785  Mean = 1.60 
 % Relative Standard Deviation = 34.2 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  Mean = 7.10 
 % Relative Standard Deviation = 21.9 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 3.57 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 23 
 Blind Sample ID = 33DW/6705  Mean = 2.08 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6703  Mean = 3.63 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 6.07 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 14 
 Blind Sample ID = 33DW-67121  Mean = 2.59 
 % Relative Standard Deviation = 38.8 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 6.83 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 29 
 Blind Sample ID = 33DIW-67135  Mean = 5.29 
 % Relative Standard Deviation = 54.7 
 Number of Observations = 34 
 Blind Sample ID = 33DIW-67131  Mean = 4.51 
 % Relative Standard Deviation = 17.4 
 Number of Observations = 45 
 Blind Sample ID = 33DIW-67127  Mean = 3.86 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 7 
 Blind Sample ID = 3399/67DW  Mean = 1.95 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 20 
 Blind Sample ID = 3305/67DW  Mean = 12.40 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 50.63 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  Mean = 2.47 
 % Relative Standard Deviation = 33.8 
 Number of Observations = 15 
 Blind Sample ID = 25DW/7511  Mean = 8.18 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7507  Mean = 2.16 
 % Relative Standard Deviation = 17.4 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 15.19 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 32 
 Blind Sample ID = 25DW-75113  Mean = 7.58 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75143  Mean = 1.38 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75136  Mean = 6.97 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 8.44 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 9 
 Blind Sample ID = 25DIW-75131  Mean = 4.90 
 % Relative Standard Deviation = 22.8 
 Number of Observations = 20 
 Blind Sample ID = 25DIW-75127  Mean = 9.06 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 10.25 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 4 
 Blind Sample ID = 25145-75143  Mean = 1.34 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 31 
 Blind Sample ID = 25139-75137  Mean = 7.38 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 21 
 Blind Sample ID = 25137-75135  Mean = 9.43 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 5.92 
 % Relative Standard Deviation = 33.4 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 7.20 
 % Relative Standard Deviation = 23.0 
 Number of Observations = 15 
 Blind Sample ID = 25107-75105  Mean = 7.17 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501
The SGPlot Procedure



- Selenium, UNF, EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01147, MCode: GF031
Dates: 10/30/97 through 09/18/00
Open Data Set

 Mean = 5.50 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 4 
 Blind Sample ID = 50DIW-50143  Mean = 6.45 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75153  Mean = 8.51 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75147  Mean = 7.82 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75143  Mean = 6.16 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 4 
 Blind Sample ID = 25151-75155  Mean = 10.96 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 4 
 Blind Sample ID = 25145-75147
The SGPlot Procedure



- Selenium, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01147, MCode: GF102
Dates: 10/09/98 through 09/24/01
Open Data Set

 Mean = 2.24 
 % Relative Standard Deviation = 20.8 
 Number of Observations = 4 
 Blind Sample ID = 75DIW-25155  Mean = 4.83 
 % Relative Standard Deviation = 33.4 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 2.17 
 % Relative Standard Deviation = 22.1 
 Number of Observations = 3 
 Blind Sample ID = 50157-50DIW  Mean = 3.96 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 4.17 
 % Relative Standard Deviation = 15.9 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75159  Mean = 6.85 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 8.82 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75147  Mean = 7.64 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75143  Mean = 7.41 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 5.47 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 5.55 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 10.94 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147  Mean = 6.34 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 11.07 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 10.64 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147
The SGPlot Procedure



- Selenium, UNF, GFAA-EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01147, MCode: GF073
Dates: 05/17/91 through 09/19/97
Open Data Set

 Mean = 2.50 
 % Relative Standard Deviation = 21.4 
 Number of Observations = 8 
 Blind Sample ID = 75DW-25125  Mean = 2.18 
 % Relative Standard Deviation = 18.5 
 Number of Observations = 11 
 Blind Sample ID = 75DIW-25125  Mean = 5.25 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50125  Mean = 3.00 
 % Relative Standard Deviation = 17.8 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50117  Mean = 2.23 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 6 
 Blind Sample ID = 50DIW-50139  Mean = 5.40 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 15.25 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 4 
 Blind Sample ID = 50125-50133  Mean = 7.50 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 8 
 Blind Sample ID = 50125-50123  Mean = 18.63 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 8 
 Blind Sample ID = 50107-50113  Mean = 10.25 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 8 
 Blind Sample ID = 50101-50107  Mean = 6.25 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 8 
 Blind Sample ID = 25DW-75121  Mean = 3.50 
 % Relative Standard Deviation = 15.3 
 Number of Observations = 8 
 Blind Sample ID = 25DW-75105  Mean = 7.89 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75135  Mean = 8.75 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75131  Mean = 7.88 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 8 
 Blind Sample ID = 25107-75105  Mean = 7.25 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 20 
 Blind Sample ID = 2503/7501
The SGPlot Procedure



- Selenium, UNF, Hydride, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01147, MCode: HY012
Dates: 11/12/86 through 09/24/98
Open Data Set

 Mean = 7.17 
 % Relative Standard Deviation = 38.9 
 Number of Observations = 6 
 Blind Sample ID = STS2  Mean = 12.00 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 4 
 Blind Sample ID = STS1  Mean = 10.57 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 14 
 Blind Sample ID = ST99  Mean = 5.17 
 % Relative Standard Deviation = 17.9 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 6.62 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 39 
 Blind Sample ID = 67DW-33113  Mean = 3.68 
 % Relative Standard Deviation = 27.2 
 Number of Observations = 19 
 Blind Sample ID = 50DW/5001  Mean = 4.75 
 % Relative Standard Deviation = 15.9 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 3.08 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50117  Mean = 4.33 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 4.98 
 % Relative Standard Deviation = 19.5 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 1.99 
 % Relative Standard Deviation = 23.5 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 4.94 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 13.40 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 36.50 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 9.75 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 8 
 Blind Sample ID = 50143-50145  Mean = 7.31 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 3.82 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 4.88 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 15.33 
 % Relative Standard Deviation = 15.8 
 Number of Observations = 12 
 Blind Sample ID = 50125-50133  Mean = 7.50 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 28 
 Blind Sample ID = 50125-50123  Mean = 6.63 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 6.94 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 7.50 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 3.44 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 8.14 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 5.27 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 7.73 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 15 
 Blind Sample ID = 5007/5003  Mean = 9.50 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 5.00 
 % Relative Standard Deviation = 35.3 
 Number of Observations = 10 
 Blind Sample ID = 5001/5011  Mean = 9.25 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 5.80 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 10 
 Blind Sample ID = 5001/5003  Mean = 6.40 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 2.67 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 3.61 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 23 
 Blind Sample ID = 33DW/6705  Mean = 3.50 
 % Relative Standard Deviation = 15.3 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 6.29 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 14 
 Blind Sample ID = 33DW-67121  Mean = 2.44 
 % Relative Standard Deviation = 21.0 
 Number of Observations = 16 
 Blind Sample ID = 33DW-67115  Mean = 6.75 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 8 
 Blind Sample ID = 33DIW-67135  Mean = 8.27 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 11 
 Blind Sample ID = 33DIW-67131  Mean = 2.25 
 % Relative Standard Deviation = 38.5 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7511  Mean = 8.83 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 2.14 
 % Relative Standard Deviation = 32.2 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7503  Mean = 15.38 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 24 
 Blind Sample ID = 25DW-75113  Mean = 4.29 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 14 
 Blind Sample ID = 25DW-75105  Mean = 7.25 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75143  Mean = 6.48 
 % Relative Standard Deviation = 17.2 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 8.33 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 9 
 Blind Sample ID = 25DIW-75131  Mean = 5.19 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75127  Mean = 5.68 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 1.30 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 8 
 Blind Sample ID = 25139-75137  Mean = 10.14 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 6.50 
 % Relative Standard Deviation = 22.2 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 6.74 
 % Relative Standard Deviation = 23.6 
 Number of Observations = 19 
 Blind Sample ID = 2503/7501
The SGPlot Procedure



- Silver, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01075, MCode: CX011
Dates: 10/14/86 through 05/08/89
Open Data Set

 Mean = 1.75 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 8.07 
 % Relative Standard Deviation = 30.0 
 Number of Observations = 29 
 Blind Sample ID = ST97  Mean = 1.08 
 % Relative Standard Deviation = 25.8 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 4.80 
 % Relative Standard Deviation = 27.2 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 4.41 
 % Relative Standard Deviation = 19.1 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6797  Mean = 1.19 
 % Relative Standard Deviation = 37.3 
 Number of Observations = 52 
 Blind Sample ID = 33DW/6793  Mean = 1.20 
 % Relative Standard Deviation = 35.1 
 Number of Observations = 10 
 Blind Sample ID = 33DW/6785  Mean = 2.24 
 % Relative Standard Deviation = 33.7 
 Number of Observations = 17 
 Blind Sample ID = 33DW/6703  Mean = 1.33 
 % Relative Standard Deviation = 43.3 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 5.92 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 2.36 
 % Relative Standard Deviation = 21.3 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7503
The SGPlot Procedure



- Silver, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01075, MCode: GF092
Dates: 05/12/89 through 09/24/01
Open Data Set

 Mean = 2.52 
 % Relative Standard Deviation = 22.6 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25151  Mean = 8.83 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 4.85 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 4.12 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 18 
 Blind Sample ID = 50139-50141  Mean = 6.39 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 16 
 Blind Sample ID = 50135-50139  Mean = 3.88 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 12.07 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 15 
 Blind Sample ID = 5011/5007  Mean = 4.95 
 % Relative Standard Deviation = 33.2 
 Number of Observations = 41 
 Blind Sample ID = 5007/5003  Mean = 4.50 
 % Relative Standard Deviation = 52.9 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 3.33 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 12 
 Blind Sample ID = 5003/5001  Mean = 2.25 
 % Relative Standard Deviation = 66.7 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6799  Mean = 8.00 
 % Relative Standard Deviation = 15.3 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  Mean = 1.31 
 % Relative Standard Deviation = 36.7 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 7.44 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 16 
 Blind Sample ID = 33DW/6707  Mean = 1.11 
 % Relative Standard Deviation = 30.0 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6703  Mean = 2.82 
 % Relative Standard Deviation = 25.8 
 Number of Observations = 17 
 Blind Sample ID = 33DW-67115  Mean = 5.47 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 19 
 Blind Sample ID = 33127-67133  Mean = 8.53 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 15 
 Blind Sample ID = 25DW/7511  Mean = 8.25 
 % Relative Standard Deviation = 22.9 
 Number of Observations = 4 
 Blind Sample ID = 25DW/7507  Mean = 2.88 
 % Relative Standard Deviation = 29.0 
 Number of Observations = 8 
 Blind Sample ID = 25DW/7503  Mean = 7.28 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75159  Mean = 4.14 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 7 
 Blind Sample ID = 25DIW-75153  Mean = 4.90 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75147  Mean = 14.66 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 7.29 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 1.85 
 % Relative Standard Deviation = 19.8 
 Number of Observations = 39 
 Blind Sample ID = 25DIW-75127  Mean = 3.13 
 % Relative Standard Deviation = 19.8 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 2.37 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 4 
 Blind Sample ID = 25159-75155  Mean = 10.12 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 4 
 Blind Sample ID = 25155-75157  Mean = 7.18 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 8.04 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 14 
 Blind Sample ID = 25137-75135  Mean = 2.78 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 40 
 Blind Sample ID = 25125-75127  Mean = 3.05 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 20 
 Blind Sample ID = 25125-75113  Mean = 1.33 
 % Relative Standard Deviation = 36.9 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 3.71 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 14 
 Blind Sample ID = 2509/7501  Mean = 3.75 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 16 
 Blind Sample ID = 2505/7501  Mean = 2.56 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Silver, FIL, GFAA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01075, MCode: GF093
Dates: 10/07/98 through 08/09/00
Open Data Set

 Mean = 3.52 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 4 
 Blind Sample ID = 50DIW-50145  Mean = 4.54 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 3 
 Blind Sample ID = 25DIW-75147  Mean = 4.65 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 8 
 Blind Sample ID = 25155-75147  Mean = 6.77 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145
The SGPlot Procedure



- Silver, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01075, MCode: PLM43
Dates: 02/07/94 through 08/28/01
Open Data Set

 Mean = 3.43 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 8.55 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 4.72 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 7.32 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 13.27 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 28 
 Blind Sample ID = 50143-50151  Mean = 11.34 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 4.93 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 5.47 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 10.74 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 3.97 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 2.54 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 7.20 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 2.63 
 % Relative Standard Deviation = 18.6 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 2.88 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Silver, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01075, MCode: PLA11
Dates: 08/10/87 through 08/23/01
Open Data Set

 Mean = 5.94 
 % Relative Standard Deviation = 20.1 
 Number of Observations = 36 
 Blind Sample ID = ST97  Mean = 1.71 
 % Relative Standard Deviation = 44.1 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 1.12 
 % Relative Standard Deviation = 29.7 
 Number of Observations = 17 
 Blind Sample ID = 67DW-33113  Mean = 1.38 
 % Relative Standard Deviation = 41.9 
 Number of Observations = 24 
 Blind Sample ID = 5099/5093  Mean = 1.62 
 % Relative Standard Deviation = 53.8 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  Mean = 3.13 
 % Relative Standard Deviation = 66.4 
 Number of Observations = 30 
 Blind Sample ID = 5097/5099  Mean = 5.68 
 % Relative Standard Deviation = 26.8 
 Number of Observations = 25 
 Blind Sample ID = 5097/5001  Mean = 7.36 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 12 
 Blind Sample ID = 50157-50DIW  Mean = 12.98 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 16 
 Blind Sample ID = 50143-50151  Mean = 11.15 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 14 
 Blind Sample ID = 50143-50145  Mean = 4.77 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 12 
 Blind Sample ID = 50139-50145  Mean = 2.73 
 % Relative Standard Deviation = 39.1 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 4.57 
 % Relative Standard Deviation = 24.0 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 1.67 
 % Relative Standard Deviation = 59.8 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 3.84 
 % Relative Standard Deviation = 24.6 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 1.04 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 24 
 Blind Sample ID = 50123-50121  Mean = 1.04 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 1.16 
 % Relative Standard Deviation = 36.9 
 Number of Observations = 44 
 Blind Sample ID = 50121-50105  Mean = 4.17 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 47 
 Blind Sample ID = 50115-50103  Mean = 13.67 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 1.33 
 % Relative Standard Deviation = 56.5 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 2.35 
 % Relative Standard Deviation = 55.5 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 7.80 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 8.69 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 61 
 Blind Sample ID = 5007/5001  Mean = 5.72 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 18 
 Blind Sample ID = 5003/5097  Mean = 4.19 
 % Relative Standard Deviation = 33.1 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 8.50 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6707  Mean = 10.33 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 9 
 Blind Sample ID = 25DW/7507  Mean = 1.09 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75121  Mean = 7.27 
 % Relative Standard Deviation = 19.8 
 Number of Observations = 21 
 Blind Sample ID = 25DIW-75151  Mean = 6.76 
 % Relative Standard Deviation = 23.7 
 Number of Observations = 17 
 Blind Sample ID = 25DIW-75135  Mean = 1.22 
 % Relative Standard Deviation = 44.9 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 11.05 
 % Relative Standard Deviation = 19.7 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 5.32 
 % Relative Standard Deviation = 28.6 
 Number of Observations = 7 
 Blind Sample ID = 25155-75153  Mean = 5.66 
 % Relative Standard Deviation = 20.1 
 Number of Observations = 7 
 Blind Sample ID = 25155-75147  Mean = 6.70 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 10 
 Blind Sample ID = 25147-75145  Mean = 2.69 
 % Relative Standard Deviation = 40.1 
 Number of Observations = 33 
 Blind Sample ID = 25141-75139  Mean = 3.50 
 % Relative Standard Deviation = 27.6 
 Number of Observations = 16 
 Blind Sample ID = 25133-75127  Mean = 2.76 
 % Relative Standard Deviation = 37.3 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 2.27 
 % Relative Standard Deviation = 45.2 
 Number of Observations = 41 
 Blind Sample ID = 25125-75127  Mean = 2.22 
 % Relative Standard Deviation = 42.4 
 Number of Observations = 46 
 Blind Sample ID = 25125-75113  Mean = 1.54 
 % Relative Standard Deviation = 54.0 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 1.43 
 % Relative Standard Deviation = 50.0 
 Number of Observations = 40 
 Blind Sample ID = 25117-75113  Mean = 3.95 
 % Relative Standard Deviation = 35.8 
 Number of Observations = 39 
 Blind Sample ID = 25101-75113  Mean = 6.29 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 7 
 Blind Sample ID = 2505/7501  Mean = 2.61 
 % Relative Standard Deviation = 69.7 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 3.13 
 % Relative Standard Deviation = 24.6 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 2.92 
 % Relative Standard Deviation = 26.0 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 1.20 
 % Relative Standard Deviation = 37.3 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Silver, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01077, MCode: CX020
Dates: 10/14/86 through 04/27/89
Open Data Set

 Mean = 13.29 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 7 
 Blind Sample ID = STS2  Mean = 4.75 
 % Relative Standard Deviation = 55.4 
 Number of Observations = 4 
 Blind Sample ID = STS1  Mean = 1.71 
 % Relative Standard Deviation = 35.7 
 Number of Observations = 14 
 Blind Sample ID = ST99  Mean = 2.17 
 % Relative Standard Deviation = 28.5 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 2.75 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5001  Mean = 4.40 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 3.71 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 7 
 Blind Sample ID = 5001/5003  Mean = 1.50 
 % Relative Standard Deviation = 35.6 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 1.50 
 % Relative Standard Deviation = 38.5 
 Number of Observations = 4 
 Blind Sample ID = 3399/67DW
The SGPlot Procedure



- Silver, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01077, MCode: GF103
Dates: 05/08/89 through 09/24/01
Open Data Set

 Mean = 2.51 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25151  Mean = 1.10 
 % Relative Standard Deviation = 27.9 
 Number of Observations = 39 
 Blind Sample ID = 67DW-33113  Mean = 2.00 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  Mean = 1.92 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50125  Mean = 1.78 
 % Relative Standard Deviation = 24.8 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 3.38 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50145  Mean = 8.73 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 1.04 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 4.86 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 7.49 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 11.60 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 8 
 Blind Sample ID = 50143-50145  Mean = 4.88 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 3.10 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 4.98 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 5.62 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 13 
 Blind Sample ID = 50125-50133  Mean = 2.07 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 28 
 Blind Sample ID = 50125-50123  Mean = 1.56 
 % Relative Standard Deviation = 32.8 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 1.20 
 % Relative Standard Deviation = 35.1 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 3.75 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 12.07 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 4.91 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 5.36 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 14 
 Blind Sample ID = 5007/5003  Mean = 5.00 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 8.60 
 % Relative Standard Deviation = 27.5 
 Number of Observations = 10 
 Blind Sample ID = 5001/5011  Mean = 5.50 
 % Relative Standard Deviation = 56.5 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 3.33 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 3 
 Blind Sample ID = 5001/5003  Mean = 1.20 
 % Relative Standard Deviation = 37.3 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 1.23 
 % Relative Standard Deviation = 35.6 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 2.94 
 % Relative Standard Deviation = 19.5 
 Number of Observations = 16 
 Blind Sample ID = 33DW-67115  Mean = 5.75 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 8 
 Blind Sample ID = 33DIW-67135  Mean = 10.36 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7511  Mean = 7.58 
 % Relative Standard Deviation = 20.6 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 2.33 
 % Relative Standard Deviation = 65.5 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7503  Mean = 3.21 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 24 
 Blind Sample ID = 25DW-75113  Mean = 7.33 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75159  Mean = 4.07 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 4.87 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 11 
 Blind Sample ID = 25DIW-75147  Mean = 14.52 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 15 
 Blind Sample ID = 25DIW-75143  Mean = 7.08 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 2.06 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75127  Mean = 2.36 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 11.74 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 12.07 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 4.70 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147  Mean = 2.78 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 6.67 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145  Mean = 7.22 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 2.98 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 3.71 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 1.50 
 % Relative Standard Deviation = 34.8 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Strontium, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01080, MCode: AA038
Dates: 01/11/90 through 03/27/96
Open Data Set

 Mean = 406.30 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 27 
 Blind Sample ID = 5007/5003  Mean = 968.33 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 12 
 Blind Sample ID = 5003/5001  Mean = 193.64 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 11 
 Blind Sample ID = 33DIW-67131  Mean = 32.50 
 % Relative Standard Deviation = 29.5 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75135  Mean = 217.50 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 63.33 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 3 
 Blind Sample ID = 25133-75127  Mean = 54.55 
 % Relative Standard Deviation = 22.2 
 Number of Observations = 11 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Strontium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01080, MCode: PLA11
Dates: 10/14/86 through 09/27/01
Open Data Set

 Mean = 512.46 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 820.59 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 61.38 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 439.17 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 94.89 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 8 
 Blind Sample ID = 75DIW-25151  Mean = 10.80 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 40 
 Blind Sample ID = 67DW-33113  Mean = 151.28 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 204.30 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 113.66 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50137  Mean = 23.52 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 2023.08 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  Mean = 2187.10 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 31 
 Blind Sample ID = 5097/5099  Mean = 858.33 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 24 
 Blind Sample ID = 5097/5001  Mean = 411.95 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 41 
 Blind Sample ID = 5093/5087  Mean = 30.14 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 12 
 Blind Sample ID = 50157-50DIW  Mean = 177.32 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 13 
 Blind Sample ID = 50155-50DIW  Mean = 340.85 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 22 
 Blind Sample ID = 50143-50151  Mean = 255.88 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 22 
 Blind Sample ID = 50143-50145  Mean = 305.59 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 26 
 Blind Sample ID = 50139-50145  Mean = 199.06 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 140.29 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 168.33 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 47.36 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 46.57 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 30 
 Blind Sample ID = 50123-50121  Mean = 44.96 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 805.90 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 39 
 Blind Sample ID = 50121-50105  Mean = 714.23 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 26 
 Blind Sample ID = 50115-50103  Mean = 111.22 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 902.92 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = 50105-50117  Mean = 972.27 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 22 
 Blind Sample ID = 50103-50101  Mean = 406.40 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 635.08 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 61 
 Blind Sample ID = 5007/5001  Mean = 633.33 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 18 
 Blind Sample ID = 5003/5097  Mean = 965.00 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 359.26 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6797  Mean = 41.73 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 108.00 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  Mean = 42.00 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 503.08 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6703  Mean = 31.25 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 29.77 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 13 
 Blind Sample ID = 33DW-67121  Mean = 31.00 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 4 
 Blind Sample ID = 33DIW-67135  Mean = 387.20 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 616.84 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  Mean = 124.29 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7511  Mean = 48.17 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 563.68 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 32.13 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75121  Mean = 147.14 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75159  Mean = 230.86 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 287.28 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 33 
 Blind Sample ID = 25DIW-75151  Mean = 235.21 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75147  Mean = 230.14 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75143  Mean = 35.01 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 29 
 Blind Sample ID = 25DIW-75135  Mean = 213.89 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 1881.25 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 328.39 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 159.18 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 135.98 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 317.34 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 12 
 Blind Sample ID = 25155-75153  Mean = 328.35 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 12 
 Blind Sample ID = 25155-75147  Mean = 362.09 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 227.91 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 26 
 Blind Sample ID = 25147-75145  Mean = 284.94 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 8 
 Blind Sample ID = 25145-75147  Mean = 353.19 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 276.36 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 24 
 Blind Sample ID = 25139-75137  Mean = 69.90 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 20 
 Blind Sample ID = 25133-75127  Mean = 47.90 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 49.71 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 41 
 Blind Sample ID = 25125-75127  Mean = 35.50 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 46 
 Blind Sample ID = 25125-75113  Mean = 50.17 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 23 
 Blind Sample ID = 25123-75127  Mean = 91.00 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 22 
 Blind Sample ID = 25117-75113  Mean = 329.17 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = 25101-75113  Mean = 949.33 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 1295.65 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501  Mean = 3144.44 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 490.00 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 1446.15 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 187.00 
 % Relative Standard Deviation = 33.6 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Strontium, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01082, MCode: PLA15
Dates: 05/17/99 through 09/14/01
Open Data Set

 Mean = 88.98 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 4 
 Blind Sample ID = 75DIW-25155  Mean = 28.87 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 166.54 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 228.40 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75147  Mean = 149.85 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 4 
 Blind Sample ID = 25157-75159  Mean = 320.40 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 3 
 Blind Sample ID = 25155-75147  Mean = 220.96 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 3 
 Blind Sample ID = 25147-75145
The SGPlot Procedure



- Thallium, FIL, GFAA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01057, MCode: GF083
Dates: 10/07/98 through 09/08/99
Open Data Set

 Mean = 7.91 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 4 
 Blind Sample ID = 50DIW-50145  Mean = 17.07 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 8 
 Blind Sample ID = 25147-75145
The SGPlot Procedure



- Uranium, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 22703, MCode: PLM43
Dates: 04/19/94 through 09/27/01
Open Data Set

 Mean = 6.79 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 34 
 Blind Sample ID = GT3  Mean = 1.85 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25155  Mean = 1.09 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 2.57 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 13 
 Blind Sample ID = 75DIW-25137  Mean = 5.69 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 14 
 Blind Sample ID = 50DIW-50143  Mean = 1.63 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 3.45 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 13.46 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 28 
 Blind Sample ID = 50143-50151  Mean = 6.30 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 12 
 Blind Sample ID = 50143-50145  Mean = 5.11 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 4.44 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 7.24 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 9.47 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 2.57 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 25 
 Blind Sample ID = 25145-75147
The SGPlot Procedure



- Vanadium, FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01085, MCode: CL067
Dates: 09/09/89 through 12/28/99
Open Data Set

 Mean = 2.30 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5096  Mean = 5.09 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 14 
 Blind Sample ID = 50DW/5012  Mean = 11.56 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 18 
 Blind Sample ID = 50DW/5008  Mean = 2.33 
 % Relative Standard Deviation = 21.4 
 Number of Observations = 9 
 Blind Sample ID = 50DW/5004  Mean = 2.81 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50124  Mean = 2.05 
 % Relative Standard Deviation = 94.9 
 Number of Observations = 8 
 Blind Sample ID = 50DW-50122  Mean = 1.09 
 % Relative Standard Deviation = 21.9 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50118  Mean = 4.54 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 53 
 Blind Sample ID = 50DW-50112  Mean = 2.76 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 13 
 Blind Sample ID = 50DW-50104  Mean = 1.22 
 % Relative Standard Deviation = 35.5 
 Number of Observations = 12 
 Blind Sample ID = 50DIW-50128  Mean = 5.25 
 % Relative Standard Deviation = 24.0 
 Number of Observations = 4 
 Blind Sample ID = 5098/5004  Mean = 2.43 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 14 
 Blind Sample ID = 5096/50DW  Mean = 1.05 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 11 
 Blind Sample ID = 50140-50144  Mean = 6.67 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 16 
 Blind Sample ID = 5014/5096  Mean = 9.99 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 10 
 Blind Sample ID = 5014/5012  Mean = 1.72 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 13 
 Blind Sample ID = 50132-50134  Mean = 1.93 
 % Relative Standard Deviation = 25.9 
 Number of Observations = 14 
 Blind Sample ID = 50128-50132  Mean = 3.38 
 % Relative Standard Deviation = 22.1 
 Number of Observations = 4 
 Blind Sample ID = 50126-50128  Mean = 5.40 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 8 
 Blind Sample ID = 50126-50124  Mean = 1.84 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 9 
 Blind Sample ID = 50126-50122  Mean = 2.27 
 % Relative Standard Deviation = 27.3 
 Number of Observations = 10 
 Blind Sample ID = 50120-50128  Mean = 3.54 
 % Relative Standard Deviation = 25.7 
 Number of Observations = 10 
 Blind Sample ID = 50120-50124  Mean = 6.04 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 12 
 Blind Sample ID = 50120-50112  Mean = 8.88 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 10 
 Blind Sample ID = 50114-50112  Mean = 2.68 
 % Relative Standard Deviation = 25.0 
 Number of Observations = 12 
 Blind Sample ID = 50110-50118  Mean = 6.70 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 12 
 Blind Sample ID = 50110-50112  Mean = 6.14 
 % Relative Standard Deviation = 21.8 
 Number of Observations = 14 
 Blind Sample ID = 50106-50112  Mean = 4.77 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 6 
 Blind Sample ID = 50106-50104  Mean = 15.38 
 % Relative Standard Deviation = 25.2 
 Number of Observations = 13 
 Blind Sample ID = 5010/5008  Mean = 4.81 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 16 
 Blind Sample ID = 5010/5004  Mean = 4.08 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 12 
 Blind Sample ID = 5006/5004  Mean = 2.61 
 % Relative Standard Deviation = 37.5 
 Number of Observations = 18 
 Blind Sample ID = 5004/50DW  Mean = 3.79 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 13 
 Blind Sample ID = 5000/5096  Mean = 1.06 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 7 
 Blind Sample ID = 25DIW-75132  Mean = 1.83 
 % Relative Standard Deviation = 18.5 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75120  Mean = 7.17 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 3 
 Blind Sample ID = 25146-75144  Mean = 5.37 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 8 
 Blind Sample ID = 25134-75136  Mean = 2.02 
 % Relative Standard Deviation = 25.6 
 Number of Observations = 6 
 Blind Sample ID = 25130-75128  Mean = 2.58 
 % Relative Standard Deviation = 30.4 
 Number of Observations = 5 
 Blind Sample ID = 25122-75128
The SGPlot Procedure



- Vanadium, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01085, MCode: PLM40
Dates: 01/11/00 through 09/27/01
Open Data Set

 Mean = 14.91 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 16 
 Blind Sample ID = 50152-50DIW  Mean = 0.48 
 % Relative Standard Deviation = 27.2 
 Number of Observations = 16 
 Blind Sample ID = 50004-50DIW  Mean = 31.25 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 16 
 Blind Sample ID = 25152-75150  Mean = 9.39 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 9 
 Blind Sample ID = 25146-75144
The SGPlot Procedure



- Vanadium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01085, MCode: PLA11
Dates: 10/14/86 through 09/27/01
Open Data Set

 Mean = 6.31 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 7.10 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 31 
 Blind Sample ID = 5097/5099  Mean = 10.60 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 25 
 Blind Sample ID = 5097/5001  Mean = 7.98 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 12 
 Blind Sample ID = 50157-50DIW  Mean = 12.59 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 13 
 Blind Sample ID = 50155-50DIW  Mean = 42.99 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 22 
 Blind Sample ID = 50143-50151  Mean = 21.16 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 22 
 Blind Sample ID = 50143-50145  Mean = 8.32 
 % Relative Standard Deviation = 15.7 
 Number of Observations = 5 
 Blind Sample ID = 50139-50145  Mean = 11.49 
 % Relative Standard Deviation = 15.7 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 33.03 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 19.33 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 30.12 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 6.08 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 24 
 Blind Sample ID = 50123-50121  Mean = 6.08 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 6.11 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 44 
 Blind Sample ID = 50121-50105  Mean = 28.00 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 47 
 Blind Sample ID = 50115-50103  Mean = 20.41 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 6.15 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 27.07 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 26.56 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 15.03 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 61 
 Blind Sample ID = 5007/5001  Mean = 21.53 
 % Relative Standard Deviation = 18.1 
 Number of Observations = 19 
 Blind Sample ID = 5003/5097  Mean = 27.19 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 17.80 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  Mean = 10.15 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 25.50 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6703  Mean = 6.04 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 21.00 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7511  Mean = 11.27 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7507  Mean = 28.47 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 43.41 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 33 
 Blind Sample ID = 25DIW-75151  Mean = 38.35 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 17 
 Blind Sample ID = 25DIW-75135  Mean = 24.17 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 13.50 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 14.23 
 % Relative Standard Deviation = 18.1 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 19.21 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 12 
 Blind Sample ID = 25155-75153  Mean = 18.33 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 12 
 Blind Sample ID = 25155-75147  Mean = 12.14 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 26 
 Blind Sample ID = 25147-75145  Mean = 6.46 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 11.61 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 24 
 Blind Sample ID = 25139-75137  Mean = 11.69 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 16 
 Blind Sample ID = 25133-75127  Mean = 7.50 
 % Relative Standard Deviation = 24.3 
 Number of Observations = 42 
 Blind Sample ID = 25127-75125  Mean = 9.15 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 41 
 Blind Sample ID = 25125-75127  Mean = 8.02 
 % Relative Standard Deviation = 17.7 
 Number of Observations = 46 
 Blind Sample ID = 25125-75113  Mean = 8.67 
 % Relative Standard Deviation = 21.7 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 7.88 
 % Relative Standard Deviation = 16.1 
 Number of Observations = 40 
 Blind Sample ID = 25117-75113  Mean = 10.56 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 39 
 Blind Sample ID = 25101-75113  Mean = 18.27 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 13.22 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501  Mean = 10.89 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 25.09 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 8.00 
 % Relative Standard Deviation = 16.1 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 20.20 
 % Relative Standard Deviation = 39.8 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Zinc, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01090, MCode: AA039
Dates: 10/14/86 through 03/27/96
Open Data Set

 Mean = 37.50 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 19.00 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 10 
 Blind Sample ID = 67DW-33113  Mean = 80.91 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 11 
 Blind Sample ID = 5097/50DW  Mean = 104.00 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 15.00 
 % Relative Standard Deviation = 38.5 
 Number of Observations = 4 
 Blind Sample ID = 5095/50DW  Mean = 213.33 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 3 
 Blind Sample ID = 50115-50103  Mean = 158.67 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 196.43 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 40.97 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 31 
 Blind Sample ID = 5007/50DW  Mean = 52.75 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 40 
 Blind Sample ID = 5007/5003  Mean = 22.42 
 % Relative Standard Deviation = 25.0 
 Number of Observations = 33 
 Blind Sample ID = 5003/50DW  Mean = 48.18 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 11 
 Blind Sample ID = 5003/5001  Mean = 26.00 
 % Relative Standard Deviation = 19.9 
 Number of Observations = 10 
 Blind Sample ID = 33DW/6799  Mean = 103.33 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6797  Mean = 15.00 
 % Relative Standard Deviation = 66.7 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6787  Mean = 76.25 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6785  Mean = 50.77 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 54.67 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 15 
 Blind Sample ID = 33DW/6707  Mean = 68.64 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6705  Mean = 17.14 
 % Relative Standard Deviation = 27.3 
 Number of Observations = 14 
 Blind Sample ID = 33DW/6703  Mean = 35.00 
 % Relative Standard Deviation = 16.5 
 Number of Observations = 4 
 Blind Sample ID = 33DIW-67135  Mean = 49.17 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 11.43 
 % Relative Standard Deviation = 33.1 
 Number of Observations = 7 
 Blind Sample ID = 3399/67DW  Mean = 25.83 
 % Relative Standard Deviation = 19.9 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 34.74 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 19 
 Blind Sample ID = 3305/67DW  Mean = 30.00 
 % Relative Standard Deviation = 19.2 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7599  Mean = 120.00 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7597  Mean = 184.00 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575  Mean = 56.92 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7507  Mean = 17.50 
 % Relative Standard Deviation = 25.3 
 Number of Observations = 24 
 Blind Sample ID = 25DW/7503  Mean = 37.50 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 4 
 Blind Sample ID = 25DIW-75135  Mean = 57.27 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 11 
 Blind Sample ID = 25DIW-75131  Mean = 43.33 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 3 
 Blind Sample ID = 25133-75127  Mean = 30.00 
 % Relative Standard Deviation = 31.8 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127  Mean = 16.67 
 % Relative Standard Deviation = 34.6 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504  Mean = 92.50 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Zinc, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01090, MCode: PLM43
Dates: 02/07/94 through 09/27/01
Open Data Set

 Mean = 215.11 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 34 
 Blind Sample ID = GT3  Mean = 19.75 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25155  Mean = 5.57 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25139  Mean = 13.83 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 32 
 Blind Sample ID = 75DIW-25137  Mean = 4.56 
 % Relative Standard Deviation = 17.8 
 Number of Observations = 16 
 Blind Sample ID = 75DIW-25125  Mean = 5.65 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 28 
 Blind Sample ID = 50DIW-50145  Mean = 11.80 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 32 
 Blind Sample ID = 50DIW-50143  Mean = 29.89 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50135  Mean = 15.22 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 24 
 Blind Sample ID = 50157-50DIW  Mean = 29.02 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 24 
 Blind Sample ID = 50155-50DIW  Mean = 15.26 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 28 
 Blind Sample ID = 50143-50151  Mean = 17.51 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 32 
 Blind Sample ID = 50143-50145  Mean = 48.00 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 16 
 Blind Sample ID = 50135-50137  Mean = 30.00 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 15 
 Blind Sample ID = 50125-50133  Mean = 9.16 
 % Relative Standard Deviation = 49.5 
 Number of Observations = 31 
 Blind Sample ID = 50125-50123  Mean = 22.65 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 23 
 Blind Sample ID = 25157-75159  Mean = 68.82 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 16 
 Blind Sample ID = 25155-75153  Mean = 45.84 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 20 
 Blind Sample ID = 25151-75155  Mean = 14.43 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 26 
 Blind Sample ID = 25145-75147  Mean = 26.39 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 46 
 Blind Sample ID = 25125-75127  Mean = 43.69 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 16 
 Blind Sample ID = 25125-75113
The SGPlot Procedure



- Zinc, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01090, MCode: PLA11
Dates: 10/14/86 through 09/27/01
Open Data Set

 Mean = 154.62 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 20.06 
 % Relative Standard Deviation = 30.5 
 Number of Observations = 16 
 Blind Sample ID = ST95  Mean = 30.25 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 111.67 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 12 
 Blind Sample ID = ST85  Mean = 130.00 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 112.00 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 10 
 Blind Sample ID = ST81  Mean = 24.26 
 % Relative Standard Deviation = 17.2 
 Number of Observations = 46 
 Blind Sample ID = 67DW-33113  Mean = 10.03 
 % Relative Standard Deviation = 33.1 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 27.44 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50137  Mean = 30.11 
 % Relative Standard Deviation = 15.5 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 30.67 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 24 
 Blind Sample ID = 5099/5093  Mean = 77.00 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 12 
 Blind Sample ID = 5099/5083  Mean = 93.93 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 30 
 Blind Sample ID = 5097/5099  Mean = 112.08 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 24 
 Blind Sample ID = 5097/5001  Mean = 26.06 
 % Relative Standard Deviation = 23.0 
 Number of Observations = 36 
 Blind Sample ID = 5093/5087  Mean = 15.55 
 % Relative Standard Deviation = 22.1 
 Number of Observations = 11 
 Blind Sample ID = 50157-50DIW  Mean = 34.00 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 13 
 Blind Sample ID = 50155-50DIW  Mean = 18.71 
 % Relative Standard Deviation = 23.5 
 Number of Observations = 19 
 Blind Sample ID = 50143-50151  Mean = 21.79 
 % Relative Standard Deviation = 18.1 
 Number of Observations = 9 
 Blind Sample ID = 50143-50145  Mean = 12.31 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 4 
 Blind Sample ID = 50139-50145  Mean = 144.06 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 28 
 Blind Sample ID = 50137-50141  Mean = 50.63 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 34 
 Blind Sample ID = 50135-50137  Mean = 41.08 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 48 
 Blind Sample ID = 50131-50125  Mean = 31.36 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 25 
 Blind Sample ID = 50125-50135  Mean = 14.83 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 30 
 Blind Sample ID = 50123-50121  Mean = 15.63 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 24 
 Blind Sample ID = 50121-50125  Mean = 57.58 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 60 
 Blind Sample ID = 50121-50105  Mean = 207.50 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 60 
 Blind Sample ID = 50115-50103  Mean = 195.92 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 135.00 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 48 
 Blind Sample ID = 50105-50117  Mean = 53.43 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 46 
 Blind Sample ID = 50103-50101  Mean = 54.96 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  Mean = 74.60 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 60 
 Blind Sample ID = 5007/5001  Mean = 98.56 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 18 
 Blind Sample ID = 5003/5097  Mean = 44.44 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 36 
 Blind Sample ID = 5003/5001  Mean = 106.77 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6797  Mean = 25.49 
 % Relative Standard Deviation = 17.9 
 Number of Observations = 41 
 Blind Sample ID = 33DW/6793  Mean = 216.00 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  Mean = 58.10 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 28.04 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6703  Mean = 6.38 
 % Relative Standard Deviation = 33.5 
 Number of Observations = 8 
 Blind Sample ID = 33DW-67123  Mean = 12.92 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 13 
 Blind Sample ID = 33DW-67121  Mean = 258.46 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 13 
 Blind Sample ID = 33DW-67115  Mean = 33.75 
 % Relative Standard Deviation = 14.2 
 Number of Observations = 4 
 Blind Sample ID = 33DIW-67135  Mean = 120.42 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 24 
 Blind Sample ID = 25DW/7597  Mean = 21.25 
 % Relative Standard Deviation = 18.4 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7595  Mean = 247.14 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7511  Mean = 66.45 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7507  Mean = 26.84 
 % Relative Standard Deviation = 21.2 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 15.87 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 23 
 Blind Sample ID = 25DW-75121  Mean = 15.29 
 % Relative Standard Deviation = 17.8 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75159  Mean = 56.35 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 11.42 
 % Relative Standard Deviation = 23.4 
 Number of Observations = 9 
 Blind Sample ID = 25DIW-75151  Mean = 15.40 
 % Relative Standard Deviation = 28.8 
 Number of Observations = 7 
 Blind Sample ID = 25DIW-75147  Mean = 18.46 
 % Relative Standard Deviation = 25.6 
 Number of Observations = 13 
 Blind Sample ID = 25DIW-75143  Mean = 38.92 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 28 
 Blind Sample ID = 25DIW-75135  Mean = 57.11 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 18 
 Blind Sample ID = 25DIW-75131  Mean = 61.60 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 15 
 Blind Sample ID = 2599/7501  Mean = 53.95 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 26.73 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 39.94 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 75.74 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 12 
 Blind Sample ID = 25155-75153  Mean = 26.20 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 12 
 Blind Sample ID = 25155-75147  Mean = 47.42 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155  Mean = 14.17 
 % Relative Standard Deviation = 36.7 
 Number of Observations = 20 
 Blind Sample ID = 25147-75145  Mean = 16.06 
 % Relative Standard Deviation = 20.7 
 Number of Observations = 7 
 Blind Sample ID = 25145-75147  Mean = 63.95 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 34 
 Blind Sample ID = 25141-75139  Mean = 40.75 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 24 
 Blind Sample ID = 25139-75137  Mean = 39.30 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 20 
 Blind Sample ID = 25133-75127  Mean = 15.66 
 % Relative Standard Deviation = 23.9 
 Number of Observations = 41 
 Blind Sample ID = 25127-75125  Mean = 27.51 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 41 
 Blind Sample ID = 25125-75127  Mean = 47.09 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 46 
 Blind Sample ID = 25125-75113  Mean = 27.67 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 24 
 Blind Sample ID = 25123-75127  Mean = 92.07 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 41 
 Blind Sample ID = 25117-75113  Mean = 60.92 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 39 
 Blind Sample ID = 25101-75113  Mean = 69.07 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 15 
 Blind Sample ID = 2509/7501  Mean = 73.91 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501  Mean = 51.00 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 72.06 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 47 
 Blind Sample ID = 2501/7509  Mean = 82.62 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 55.00 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 5 
 Blind Sample ID =
The SGPlot Procedure



- Zinc, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01092, MCode: AA071
Dates: 10/14/86 through 03/12/99
Open Data Set

 Mean = 68.00 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 5 
 Blind Sample ID = STS2  Mean = 152.50 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 4 
 Blind Sample ID = STS1  Mean = 40.71 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 14 
 Blind Sample ID = ST99  Mean = 26.67 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 15 
 Blind Sample ID = ST93  Mean = 14.70 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 10 
 Blind Sample ID = 75DIW-25137  Mean = 25.26 
 % Relative Standard Deviation = 27.2 
 Number of Observations = 38 
 Blind Sample ID = 67DW-33113  Mean = 35.00 
 % Relative Standard Deviation = 26.4 
 Number of Observations = 18 
 Blind Sample ID = 50DW/5001  Mean = 10.91 
 % Relative Standard Deviation = 27.6 
 Number of Observations = 11 
 Blind Sample ID = 50DW-50125  Mean = 95.00 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 12 
 Blind Sample ID = 50DW-50117  Mean = 44.44 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 9 
 Blind Sample ID = 50DW-50101  Mean = 13.50 
 % Relative Standard Deviation = 26.6 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50143  Mean = 10.80 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 5 
 Blind Sample ID = 50DIW-50139  Mean = 26.38 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 16 
 Blind Sample ID = 50DIW-50137  Mean = 29.75 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 8 
 Blind Sample ID = 50DIW-50135  Mean = 102.50 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 4 
 Blind Sample ID = 5097/5099  Mean = 17.50 
 % Relative Standard Deviation = 28.6 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 18.13 
 % Relative Standard Deviation = 20.9 
 Number of Observations = 8 
 Blind Sample ID = 50143-50145  Mean = 12.13 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 50139-50145  Mean = 113.61 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 18 
 Blind Sample ID = 50139-50141  Mean = 136.63 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 8 
 Blind Sample ID = 50137-50141  Mean = 31.63 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 16 
 Blind Sample ID = 50135-50139  Mean = 48.25 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 8 
 Blind Sample ID = 50135-50137  Mean = 10.74 
 % Relative Standard Deviation = 24.8 
 Number of Observations = 27 
 Blind Sample ID = 50125-50123  Mean = 18.75 
 % Relative Standard Deviation = 34.2 
 Number of Observations = 8 
 Blind Sample ID = 50123-50121  Mean = 63.13 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 16 
 Blind Sample ID = 50121-50105  Mean = 98.00 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 10 
 Blind Sample ID = 50117-50121  Mean = 218.13 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 16 
 Blind Sample ID = 50115-50103  Mean = 191.43 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 226.36 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 11 
 Blind Sample ID = 50101-50115  Mean = 57.14 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 14 
 Blind Sample ID = 5007/5003  Mean = 92.50 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 192.00 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 10 
 Blind Sample ID = 5001/5011  Mean = 58.00 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 10 
 Blind Sample ID = 5001/5003  Mean = 32.50 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6799  Mean = 17.50 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 75.56 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 48.46 
 % Relative Standard Deviation = 16.5 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6709  Mean = 69.00 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6705  Mean = 11.43 
 % Relative Standard Deviation = 31.2 
 Number of Observations = 28 
 Blind Sample ID = 33DW-67123  Mean = 16.43 
 % Relative Standard Deviation = 38.6 
 Number of Observations = 14 
 Blind Sample ID = 33DW-67121  Mean = 268.13 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 16 
 Blind Sample ID = 33DW-67115  Mean = 31.25 
 % Relative Standard Deviation = 20.5 
 Number of Observations = 8 
 Blind Sample ID = 33DIW-67135  Mean = 50.00 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 12 
 Blind Sample ID = 33DIW-67131  Mean = 11.67 
 % Relative Standard Deviation = 35.0 
 Number of Observations = 6 
 Blind Sample ID = 3399/67DW  Mean = 50.00 
 % Relative Standard Deviation = 13.7 
 Number of Observations = 18 
 Blind Sample ID = 33127-67133  Mean = 18.00 
 % Relative Standard Deviation = 22.8 
 Number of Observations = 20 
 Blind Sample ID = 33127-67123  Mean = 24.17 
 % Relative Standard Deviation = 21.3 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 35.33 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 15 
 Blind Sample ID = 3305/67DW  Mean = 233.33 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7511  Mean = 68.18 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7507  Mean = 37.14 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7503  Mean = 48.41 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 44 
 Blind Sample ID = 25DW-75113  Mean = 82.31 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 13 
 Blind Sample ID = 25DW-75105  Mean = 17.75 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75143  Mean = 40.25 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 16 
 Blind Sample ID = 25DIW-75135  Mean = 58.33 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75131  Mean = 26.30 
 % Relative Standard Deviation = 25.9 
 Number of Observations = 54 
 Blind Sample ID = 25DIW-75127  Mean = 13.17 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 6 
 Blind Sample ID = 25147-75145  Mean = 14.50 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 4 
 Blind Sample ID = 25145-75147  Mean = 61.88 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 8 
 Blind Sample ID = 25141-75139  Mean = 41.57 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 14 
 Blind Sample ID = 25139-75137  Mean = 47.64 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 14 
 Blind Sample ID = 25137-75135  Mean = 37.14 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 7 
 Blind Sample ID = 25133-75127  Mean = 30.00 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 40 
 Blind Sample ID = 25125-75127  Mean = 51.50 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 20 
 Blind Sample ID = 25125-75113  Mean = 29.17 
 % Relative Standard Deviation = 22.9 
 Number of Observations = 12 
 Blind Sample ID = 25123-75127
The SGPlot Procedure



- Zinc, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01092, MCode: PLA15
Dates: 04/05/99 through 09/28/01
Open Data Set

 Mean = 21.93 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 13 
 Blind Sample ID = 75DIW-25155  Mean = 16.96 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 4 
 Blind Sample ID = 50157-50DIW  Mean = 28.95 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 4 
 Blind Sample ID = 50155-50DIW  Mean = 21.74 
 % Relative Standard Deviation = 22.4 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75159  Mean = 54.64 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 8 
 Blind Sample ID = 25DIW-75153  Mean = 20.57 
 % Relative Standard Deviation = 20.7 
 Number of Observations = 12 
 Blind Sample ID = 25DIW-75147  Mean = 47.68 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 7 
 Blind Sample ID = 25159-75155  Mean = 23.30 
 % Relative Standard Deviation = 16.8 
 Number of Observations = 12 
 Blind Sample ID = 25157-75159  Mean = 34.48 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 8 
 Blind Sample ID = 25155-75157  Mean = 25.68 
 % Relative Standard Deviation = 22.2 
 Number of Observations = 9 
 Blind Sample ID = 25155-75147  Mean = 44.46 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 8 
 Blind Sample ID = 25151-75155
The SGPlot Procedure