- Aluminum, FIL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01106, MCode: CX001
Dates: 04/18/85 through 08/11/86
Open Data Set

 Mean = 14.00 
 % Relative Standard Deviation = 40.2 
 Number of Observations = 30 
 Blind Sample ID = 5089/50DW  Mean = 30.00 
 % Relative Standard Deviation = 88.2 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 288.04 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 51 
 Blind Sample ID = 25DW/7591  Mean = 10.83 
 % Relative Standard Deviation = 26.6 
 Number of Observations = 12 
 Blind Sample ID = 2589/7587  Mean = 20.00 
 % Relative Standard Deviation = 42.6 
 Number of Observations = 12 
 Blind Sample ID = 2581/7587
The SGPlot Procedure



- Aluminum, FIL, DCP -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01106, MCode: DCP02
Dates: 08/15/86 through 09/26/91
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 = 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 = 14.44 
 % Relative Standard Deviation = 50.3 
 Number of Observations = 9 
 Blind Sample ID = 5089/50DW  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 = 46.67 
 % Relative Standard Deviation = 99.0 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6785  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 = 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 = 287.50 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = 25DW/7591  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 = 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, UNF, DCP -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01105, MCode: DCP05
Dates: 10/14/86 through 09/23/91
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 = 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 = 120.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 5001/5003  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
The SGPlot Procedure



- Antimony, FIL, Hydride, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01095, MCode: HY009
Dates: 04/24/85 through 09/26/91
Open Data Set

 Mean = 12.08 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 13 
 Blind Sample ID = ST97  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = ST85  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6785  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7595  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 = 8.25 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 8.48 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501
The SGPlot Procedure



- Arsenic, FIL, Hydride, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01000, MCode: HY010
Dates: 03/29/85 through 09/26/91
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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 10.68 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 22 
 Blind Sample ID = ST89  Mean = 6.00 
 % Relative Standard Deviation = 17.8 
 Number of Observations = 15 
 Blind Sample ID = ST85  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 = 2.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 5.30 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 47 
 Blind Sample ID = 5089/50DW  Mean = 2.33 
 % Relative Standard Deviation = 22.1 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 2.80 
 % Relative Standard Deviation = 39.1 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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 = 3.64 
 % Relative Standard Deviation = 24.8 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6785  Mean = 2.25 
 % Relative Standard Deviation = 22.2 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6783  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 = 2.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID = 3399/67DW  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 21 
 Blind Sample ID = 3305/67DW  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 59 
 Blind Sample ID = 25DW/7591  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 = 7.75 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 3.92 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 12 
 Blind Sample ID = 2589/7587  Mean = 3.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  Mean = 6.08 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 12 
 Blind Sample ID = 2581/7587  Mean = 3.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504  Mean = 6.26 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501
The SGPlot Procedure



- Arsenic, UNF, GFAA-EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01002, MCode: GF073
Dates: 05/17/91 through 09/23/91
Open Data Set

 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: 03/29/85 through 09/25/91
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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 10.86 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 21 
 Blind Sample ID = ST89  Mean = 3.84 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 19 
 Blind Sample ID = 50DW/5001  Mean = 9.20 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 2.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 5.25 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 8 
 Blind Sample ID = 5089/50DW  Mean = 2.83 
 % Relative Standard Deviation = 56.5 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 3.60 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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 = 2.43 
 % Relative Standard Deviation = 22.0 
 Number of Observations = 7 
 Blind Sample ID = 3399/67DW  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 21 
 Blind Sample ID = 3305/67DW  Mean = 7.42 
 % Relative Standard Deviation = 37.9 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 3.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = 25DW/7503  Mean = 3.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  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: 03/29/85 through 09/30/91
Open Data Set

 Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 21 
 Blind Sample ID = ST89  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 187.50 
 % Relative Standard Deviation = 34.2 
 Number of Observations = 8 
 Blind Sample ID = 5089/50DW  Mean = 160.00 
 % Relative Standard Deviation = 34.2 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  Mean = 121.43 
 % Relative Standard Deviation = 35.1 
 Number of Observations = 14 
 Blind Sample ID = 5011/5007  Mean = 134.15 
 % Relative Standard Deviation = 48.9 
 Number of Observations = 41 
 Blind Sample ID = 5007/5003  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 150.00 
 % Relative Standard Deviation = 34.8 
 Number of Observations = 12 
 Blind Sample ID = 5003/5001  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6705  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = 3399/67DW  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 20 
 Blind Sample ID = 3305/67DW  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Barium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01005, MCode: PLA11
Dates: 04/24/85 through 09/30/91
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 = 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 = 35.14 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 29 
 Blind Sample ID = 5085/5091  Mean = 119.78 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 46 
 Blind Sample ID = 5083/5089  Mean = 116.33 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 22.55 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 11 
 Blind Sample ID = 33DW/6785  Mean = 116.67 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  Mean = 18.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  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 = 82.67 
 % Relative Standard Deviation = 1.0 
 Number of Observations = 6 
 Blind Sample ID = 3383/6785  Mean = 197.00 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 10 
 Blind Sample ID = 3381/6783  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 = 50.06 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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 = 52.20 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 20.77 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 120.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Barium, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01007, MCode: AA042
Dates: 03/29/85 through 09/30/91
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 = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 14 
 Blind Sample ID = ST99  Mean = 116.67 
 % Relative Standard Deviation = 44.1 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 38 
 Blind Sample ID = ST91  Mean = 105.26 
 % Relative Standard Deviation = 21.8 
 Number of Observations = 19 
 Blind Sample ID = ST89  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = 50DW/5001  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 187.50 
 % Relative Standard Deviation = 52.9 
 Number of Observations = 8 
 Blind Sample ID = 5089/50DW  Mean = 220.00 
 % Relative Standard Deviation = 49.8 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  Mean = 115.38 
 % Relative Standard Deviation = 32.5 
 Number of Observations = 13 
 Blind Sample ID = 5011/5007  Mean = 121.43 
 % Relative Standard Deviation = 35.1 
 Number of Observations = 14 
 Blind Sample ID = 5007/5003  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  Mean = 125.00 
 % Relative Standard Deviation = 40.0 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 10 
 Blind Sample ID = 5001/5003  Mean = 120.00 
 % Relative Standard Deviation = 37.3 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6799  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 110.00 
 % Relative Standard Deviation = 28.0 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6705  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID = 3399/67DW  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 18 
 Blind Sample ID = 3305/67DW  Mean = 123.08 
 % Relative Standard Deviation = 35.6 
 Number of Observations = 13 
 Blind Sample ID = 25DW/7507  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = 25DW/7503  Mean = 100.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Beryllium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01010, MCode: PLA11
Dates: 04/24/85 through 09/30/91
Open Data Set

 Mean = 0.50 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 65 
 Blind Sample ID = ST97  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 = 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 = 5.78 
 % Relative Standard Deviation = 24.9 
 Number of Observations = 30 
 Blind Sample ID = 5085/5091  Mean = 16.61 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 44 
 Blind Sample ID = 5083/5089  Mean = 9.74 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 7.07 
 % Relative Standard Deviation = 28.0 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6785  Mean = 1.77 
 % Relative Standard Deviation = 31.2 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  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 = 8.02 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 6 
 Blind Sample ID = 3383/6785  Mean = 15.80 
 % Relative Standard Deviation = 21.3 
 Number of Observations = 10 
 Blind Sample ID = 3381/6783  Mean = 0.50 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  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 = 11.11 
 % Relative Standard Deviation = 24.6 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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 = 21.29 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 16.69 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 23.00 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Beryllium, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01012, MCode: AA043
Dates: 10/14/86 through 07/31/91
Open Data Set

 Mean = 57.50 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 30.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = STS1  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = ST99  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = 50DW/5001  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 10 
 Blind Sample ID = 5001/5011  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 10 
 Blind Sample ID = 5001/5003  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7507  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = 25DW/7503
The SGPlot Procedure



- Boron, FIL, DCP -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01020, MCode: DCP03
Dates: 03/20/85 through 09/23/91
Open Data Set

 Mean = 19.09 
 % Relative Standard Deviation = 27.6 
 Number of Observations = 22 
 Blind Sample ID = STM6  Mean = 181.88 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 16 
 Blind Sample ID = STM2  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 = 124.12 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 34 
 Blind Sample ID = ST90  Mean = 182.75 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 40 
 Blind Sample ID = ST88  Mean = 205.00 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 8 
 Blind Sample ID = ST86  Mean = 174.44 
 % Relative Standard Deviation = 25.0 
 Number of Observations = 9 
 Blind Sample ID = ST84  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 = 93.33 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 3 
 Blind Sample ID = 50M2/50DW  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = 50DW/5098  Mean = 49.05 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 21 
 Blind Sample ID = 50DW/5096  Mean = 90.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5088  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 = 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 = 153.33 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 3 
 Blind Sample ID = 5090/50M2  Mean = 92.86 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 21 
 Blind Sample ID = 5089/50DW  Mean = 180.00 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 7 
 Blind Sample ID = 5086/50M2  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 = 28.67 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  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 = 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 = 29.00 
 % Relative Standard Deviation = 124.0 
 Number of Observations = 20 
 Blind Sample ID = 25DW/7591  Mean = 30.00 
 % Relative Standard Deviation = 27.2 
 Number of Observations = 4 
 Blind Sample ID = 25DW/7580  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 = 200.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 2588/7584  Mean = 191.67 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 6 
 Blind Sample ID = 2586/7588  Mean = 70.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504  Mean = 64.14 
 % Relative Standard Deviation = 114.9 
 Number of Observations = 29 
 Blind Sample ID =
The SGPlot Procedure



- Cadmium, FIL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01025, MCode: CX002
Dates: 03/29/85 through 05/08/89
Open Data Set

 Mean = 4.63 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 33.21 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 38 
 Blind Sample ID = ST91  Mean = 14.29 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 21 
 Blind Sample ID = ST89  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 5095/50DW  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 7.51 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 47 
 Blind Sample ID = 5089/50DW  Mean = 1.20 
 % Relative Standard Deviation = 37.3 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6787  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 = 26.59 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 58 
 Blind Sample ID = 25DW/7591  Mean = 5.70 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575  Mean = 4.55 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 11 
 Blind Sample ID = 2589/7587  Mean = 2.00 
 % Relative Standard Deviation = 40.8 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  Mean = 3.08 
 % Relative Standard Deviation = 42.5 
 Number of Observations = 12 
 Blind Sample ID = 2581/7587
The SGPlot Procedure



- Cadmium, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01025, MCode: GF086
Dates: 05/15/89 through 09/30/91
Open Data Set

 Mean = 12.53 
 % Relative Standard Deviation = 21.9 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 16.54 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 13 
 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 = 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 = 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-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01025, MCode: PLA11
Dates: 04/24/85 through 09/30/91
Open Data Set

 Mean = 16.18 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 17 
 Blind Sample ID = ST95  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 = 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 = 17.41 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 29 
 Blind Sample ID = 5085/5091  Mean = 9.15 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 46 
 Blind Sample ID = 5083/5089  Mean = 17.94 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 1.17 
 % Relative Standard Deviation = 33.4 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6785  Mean = 4.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  Mean = 15.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  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 = 3.17 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 6 
 Blind Sample ID = 3383/6785  Mean = 6.20 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 10 
 Blind Sample ID = 3381/6783  Mean = 12.28 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  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 = 7.19 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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 = 11.11 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 4.38 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 4.14 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Cadmium, FILS, GFAA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01025, MCode: GF074
Dates: 02/14/86 through 09/30/91
Open Data Set

 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 = 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 = 1.07 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 3 
 Blind Sample ID = 2599/75DW  Mean = 3.36 
 % Relative Standard Deviation = 16.8 
 Number of Observations = 19 
 Blind Sample ID = 2589/75DW  Mean = 0.51 
 % Relative Standard Deviation = 21.6 
 Number of Observations = 10 
 Blind Sample ID = 2585/75DW  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: 03/29/85 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 = 34.32 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 38 
 Blind Sample ID = ST91  Mean = 14.86 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 21 
 Blind Sample ID = ST89  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 9.00 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 7 
 Blind Sample ID = 5089/50DW  Mean = 2.20 
 % Relative Standard Deviation = 59.3 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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  Mean = 2.50 
 % Relative Standard Deviation = 23.1 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Cadmium, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01027, MCode: GF097
Dates: 05/08/89 through 09/30/91
Open Data Set

 Mean = 4.93 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  Mean = 16.62 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 13 
 Blind Sample ID = 5011/5007  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 = 1.67 
 % Relative Standard Deviation = 34.6 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  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
The SGPlot Procedure



- Chromium, FIL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: AA011
Dates: 03/29/85 through 11/16/87
Open Data Set

 Mean = 12.67 
 % Relative Standard Deviation = 46.9 
 Number of Observations = 15 
 Blind Sample ID = ST95  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 38 
 Blind Sample ID = ST91  Mean = 16.52 
 % Relative Standard Deviation = 29.5 
 Number of Observations = 23 
 Blind Sample ID = ST89  Mean = 12.35 
 % Relative Standard Deviation = 53.8 
 Number of Observations = 17 
 Blind Sample ID = ST85  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 5095/50DW  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 47 
 Blind Sample ID = 5089/50DW  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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 = 11.43 
 % Relative Standard Deviation = 41.8 
 Number of Observations = 21 
 Blind Sample ID = 33DW/6785  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 18 
 Blind Sample ID = 25DW/7595  Mean = 10.34 
 % Relative Standard Deviation = 25.2 
 Number of Observations = 59 
 Blind Sample ID = 25DW/7591  Mean = 15.00 
 % Relative Standard Deviation = 35.1 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = 2589/7587  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 2583/7587  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = 2581/7587
The SGPlot Procedure



- Chromium, FIL, DCP -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: DCP04
Dates: 12/01/87 through 09/20/91
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 = 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 = 12.36 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 11 
 Blind Sample ID = 5011/50DW  Mean = 19.50 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 12 
 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 = 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 = 17.13 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: GF076
Dates: 11/30/87 through 09/30/91
Open Data Set

 Mean = 6.39 
 % Relative Standard Deviation = 38.0 
 Number of Observations = 16 
 Blind Sample ID = 5001/50DW  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 = 3.32 
 % Relative Standard Deviation = 49.6 
 Number of Observations = 6 
 Blind Sample ID = 2501/75DW
The SGPlot Procedure



- Chromium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: PLA11
Dates: 08/10/87 through 09/30/91
Open Data Set

 Mean = 25.50 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 36 
 Blind Sample ID = ST97  Mean = 8.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID = ST83  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 = 19.63 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 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 = 18.38 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 18.23 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Chromium, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01034, MCode: AA048
Dates: 03/29/85 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 = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 38 
 Blind Sample ID = ST91  Mean = 19.05 
 % Relative Standard Deviation = 22.9 
 Number of Observations = 21 
 Blind Sample ID = ST89  Mean = 12.50 
 % Relative Standard Deviation = 40.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 5089/50DW  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 24.00 
 % Relative Standard Deviation = 81.2 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  Mean = 12.22 
 % Relative Standard Deviation = 36.1 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Chromium, UNF, DCP -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01034, MCode: DCP07
Dates: 11/18/87 through 09/30/91
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 = 7.63 
 % Relative Standard Deviation = 25.9 
 Number of Observations = 19 
 Blind Sample ID = 50DW/5001  Mean = 22.00 
 % Relative Standard Deviation = 17.0 
 Number of Observations = 4 
 Blind Sample ID = 5097/5099  Mean = 19.92 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 12 
 Blind Sample ID = 5011/5007  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 = 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
The SGPlot Procedure



- Cobalt, FIL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01035, MCode: CX005
Dates: 03/29/85 through 05/08/89
Open Data Set

 Mean = 2.63 
 % Relative Standard Deviation = 49.6 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 11.03 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 1.38 
 % Relative Standard Deviation = 66.7 
 Number of Observations = 21 
 Blind Sample ID = ST89  Mean = 3.60 
 % Relative Standard Deviation = 42.1 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 1.50 
 % Relative Standard Deviation = 71.3 
 Number of Observations = 8 
 Blind Sample ID = 5089/50DW  Mean = 1.17 
 % Relative Standard Deviation = 35.0 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 1.60 
 % Relative Standard Deviation = 55.9 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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  Mean = 1.75 
 % Relative Standard Deviation = 54.7 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Cobalt, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01035, MCode: GF087
Dates: 05/16/89 through 09/30/91
Open Data Set

 Mean = 9.29 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 14 
 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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6799  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  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 = 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: 02/14/86 through 09/30/91
Open Data Set

 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 = 0.83 
 % Relative Standard Deviation = 42.1 
 Number of Observations = 3 
 Blind Sample ID = 2599/75DW  Mean = 0.50 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 19 
 Blind Sample ID = 2589/75DW  Mean = 0.59 
 % Relative Standard Deviation = 29.3 
 Number of Observations = 10 
 Blind Sample ID = 2585/75DW  Mean = 2.28 
 % Relative Standard Deviation = 19.7 
 Number of Observations = 12 
 Blind Sample ID = 2501/75DW
The SGPlot Procedure



- Cobalt, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01035, MCode: PLA11
Dates: 04/24/85 through 09/30/91
Open Data Set

 Mean = 5.32 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 3.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 17 
 Blind Sample ID = ST95  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 = 3.32 
 % 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 = 5.46 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 28 
 Blind Sample ID = 5085/5091  Mean = 3.21 
 % Relative Standard Deviation = 26.0 
 Number of Observations = 58 
 Blind Sample ID = 5083/5089  Mean = 9.41 
 % Relative Standard Deviation = 16.4 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 3.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6785  Mean = 3.33 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  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 = 3.33 
 % Relative Standard Deviation = 15.5 
 Number of Observations = 6 
 Blind Sample ID = 3383/6785  Mean = 6.30 
 % Relative Standard Deviation = 16.8 
 Number of Observations = 10 
 Blind Sample ID = 3381/6783  Mean = 3.96 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 3.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  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 = 7.44 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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 = 19.73 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 16.46 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 5.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Cobalt, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01037, MCode: CX015
Dates: 03/29/85 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 = 10.82 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 38 
 Blind Sample ID = ST91  Mean = 1.14 
 % Relative Standard Deviation = 41.8 
 Number of Observations = 21 
 Blind Sample ID = ST89  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = 5089/50DW  Mean = 3.17 
 % Relative Standard Deviation = 46.5 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 2.80 
 % Relative Standard Deviation = 88.9 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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  Mean = 1.25 
 % Relative Standard Deviation = 40.0 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Cobalt, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01037, MCode: GF098
Dates: 05/08/89 through 09/23/91
Open Data Set

 Mean = 5.20 
 % Relative Standard Deviation = 18.1 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  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 = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  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
The SGPlot Procedure



- Copper, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: AA016
Dates: 10/10/85 through 11/05/86
Open Data Set

 Mean = 935.43 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 35 
 Blind Sample ID = ST91  Mean = 724.26 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 54 
 Blind Sample ID = 25DW/7591  Mean = 80.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 25DW/7575
The SGPlot Procedure



- Copper, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: CX006
Dates: 03/29/85 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 = 14.05 
 % Relative Standard Deviation = 21.5 
 Number of Observations = 21 
 Blind Sample ID = ST89  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 = 5.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/50DW  Mean = 7.75 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 9.34 
 % Relative Standard Deviation = 32.2 
 Number of Observations = 47 
 Blind Sample ID = 5089/50DW  Mean = 26.67 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 30.40 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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 = 4.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6787  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  Mean = 7.55 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 11 
 Blind Sample ID = 2589/7587  Mean = 14.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  Mean = 11.58 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 12 
 Blind Sample ID = 2581/7587
The SGPlot Procedure



- Copper, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: GF088
Dates: 05/15/89 through 09/30/91
Open Data Set

 Mean = 4.93 
 % Relative Standard Deviation = 25.9 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 19.71 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 14 
 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 = 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 = 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
The SGPlot Procedure



- Copper, FIL, GFAA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: GF077
Dates: 02/14/86 through 08/23/91
Open Data Set

 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 = 18.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 25DW/7599  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 = 6.80 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 3 
 Blind Sample ID = 2599/75DW  Mean = 3.65 
 % Relative Standard Deviation = 25.9 
 Number of Observations = 19 
 Blind Sample ID = 2589/75DW  Mean = 13.40 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 10 
 Blind Sample ID = 2585/75DW  Mean = 12.83 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 12 
 Blind Sample ID = 2501/75DW
The SGPlot Procedure



- Copper, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: PLA11
Dates: 04/24/85 through 09/30/91
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 = 30.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = ST93  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 = 30.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 30.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 33.08 
 % Relative Standard Deviation = 14.5 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  Mean = 20.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 31 
 Blind Sample ID = 5097/5099  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 = 511.38 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 29 
 Blind Sample ID = 5085/5091  Mean = 30.23 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 43 
 Blind Sample ID = 5083/5089  Mean = 20.20 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  Mean = 60.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 25 
 Blind Sample ID = 5007/5003  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 = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 14 
 Blind Sample ID = 33DW/6797  Mean = 20.89 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 39.17 
 % Relative Standard Deviation = 20.2 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6785  Mean = 20.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 20 
 Blind Sample ID = 33DW/6707  Mean = 59.62 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 26 
 Blind Sample ID = 33DW/6703  Mean = 51.67 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 6 
 Blind Sample ID = 3383/6785  Mean = 36.00 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 10 
 Blind Sample ID = 3381/6783  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 9 
 Blind Sample ID = 25DW/7597  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  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 = 43.75 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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 = 30.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 18 
 Blind Sample ID = 2501/7599  Mean = 36.75 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 40 
 Blind Sample ID = 2501/7509  Mean = 30.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 18.57 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Copper, UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01042, MCode: CX016
Dates: 03/29/85 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 = 15.57 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 21 
 Blind Sample ID = ST89  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 = 9.00 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 7 
 Blind Sample ID = 5089/50DW  Mean = 28.83 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 30.60 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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  Mean = 15.25 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Copper, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01042, MCode: AA052
Dates: 10/15/85 through 04/18/89
Open Data Set

 Mean = 914.21 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 38 
 Blind Sample ID = ST91  Mean = 70.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = 5001/5003
The SGPlot Procedure



- Copper, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01042, MCode: GF099
Dates: 05/08/89 through 09/30/91
Open Data Set

 Mean = 19.20 
 % Relative Standard Deviation = 24.9 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  Mean = 19.46 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 13 
 Blind Sample ID = 5011/5007  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 = 7.67 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  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
The SGPlot Procedure



- Iron, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01046, MCode: AA018
Dates: 03/29/85 through 09/30/91
Open Data Set

 Mean = 100.00 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 305.13 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 71.90 
 % Relative Standard Deviation = 18.5 
 Number of Observations = 21 
 Blind Sample ID = ST89  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 = 41.96 
 % Relative Standard Deviation = 19.9 
 Number of Observations = 46 
 Blind Sample ID = 5089/50DW  Mean = 110.00 
 % Relative Standard Deviation = 22.3 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  Mean = 12.00 
 % Relative Standard Deviation = 46.7 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 43.57 
 % Relative Standard Deviation = 27.9 
 Number of Observations = 14 
 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 = 20.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6787  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 = 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 = 238.10 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 58 
 Blind Sample ID = 25DW/7591  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 = 36.67 
 % Relative Standard Deviation = 26.9 
 Number of Observations = 12 
 Blind Sample ID = 2589/7587  Mean = 40.00 
 % Relative Standard Deviation = 35.4 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  Mean = 205.00 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 12 
 Blind Sample ID = 2581/7587  Mean = 30.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504  Mean = 70.63 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Iron, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01046, MCode: PLA11
Dates: 04/24/85 through 09/19/91
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 = 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 = 253.67 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 30 
 Blind Sample ID = 5085/5091  Mean = 59.61 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 44 
 Blind Sample ID = 5083/5089  Mean = 41.85 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 48 
 Blind Sample ID = 5011/5007  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 = 125.92 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6785  Mean = 25.67 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  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 = 140.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = 3383/6785  Mean = 273.00 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 10 
 Blind Sample ID = 3381/6783  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 = 180.00 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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 = 362.86 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Iron, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01045, MCode: AA054
Dates: 03/29/85 through 09/30/91
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 = 308.16 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 38 
 Blind Sample ID = ST91  Mean = 70.00 
 % Relative Standard Deviation = 29.0 
 Number of Observations = 16 
 Blind Sample ID = ST89  Mean = 101.67 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 18 
 Blind Sample ID = 50DW/5001  Mean = 112.00 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 57.50 
 % Relative Standard Deviation = 43.5 
 Number of Observations = 4 
 Blind Sample ID = 5089/50DW  Mean = 112.00 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  Mean = 42.00 
 % Relative Standard Deviation = 38.6 
 Number of Observations = 10 
 Blind Sample ID = 5011/5007  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 = 51.67 
 % Relative Standard Deviation = 33.3 
 Number of Observations = 6 
 Blind Sample ID = 3399/67DW  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 = 27.50 
 % Relative Standard Deviation = 54.5 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Lead, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01049, MCode: CX007
Dates: 03/29/85 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 = 19.56 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 39 
 Blind Sample ID = ST91  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 = 5.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 5095/50DW  Mean = 5.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 1.38 
 % Relative Standard Deviation = 37.6 
 Number of Observations = 8 
 Blind Sample ID = 5089/50DW  Mean = 2.83 
 % Relative Standard Deviation = 75.4 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 6.00 
 % Relative Standard Deviation = 39.1 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  Mean = 5.31 
 % Relative Standard Deviation = 19.1 
 Number of Observations = 16 
 Blind Sample ID = 5003/50DW  Mean = 5.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = 33DW/6799  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 = 5.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6787  Mean = 6.33 
 % Relative Standard Deviation = 57.5 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  Mean = 5.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 5.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7599  Mean = 11.86 
 % Relative Standard Deviation = 39.7 
 Number of Observations = 22 
 Blind Sample ID = 25DW/7597  Mean = 15.10 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 59 
 Blind Sample ID = 25DW/7591  Mean = 12.40 
 % Relative Standard Deviation = 27.7 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575  Mean = 2.45 
 % Relative Standard Deviation = 95.3 
 Number of Observations = 11 
 Blind Sample ID = 2589/7587  Mean = 5.00 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  Mean = 3.00 
 % Relative Standard Deviation = 65.1 
 Number of Observations = 12 
 Blind Sample ID = 2581/7587
The SGPlot Procedure



- Lead, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01049, MCode: GF089
Dates: 05/15/89 through 09/30/91
Open Data Set

 Mean = 6.53 
 % Relative Standard Deviation = 29.4 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 20.71 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 14 
 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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6799  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  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 = 5.67 
 % 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
The SGPlot Procedure



- Lead, FIL, GFAA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01049, MCode: GF078
Dates: 02/14/86 through 09/30/91
Open Data Set

 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 = 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 = 0.50 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 2599/75DW  Mean = 0.78 
 % Relative Standard Deviation = 121.9 
 Number of Observations = 19 
 Blind Sample ID = 2589/75DW  Mean = 1.31 
 % Relative Standard Deviation = 15.5 
 Number of Observations = 10 
 Blind Sample ID = 2585/75DW  Mean = 4.45 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 12 
 Blind Sample ID = 2501/75DW
The SGPlot Procedure



- Lead, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01049, MCode: PLA11
Dates: 04/24/85 through 09/30/91
Open Data Set

 Mean = 16.48 
 % Relative Standard Deviation = 29.2 
 Number of Observations = 54 
 Blind Sample ID = ST97  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 15.00 
 % Relative Standard Deviation = 35.6 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 18.57 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  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 = 13.67 
 % Relative Standard Deviation = 40.7 
 Number of Observations = 30 
 Blind Sample ID = 5085/5091  Mean = 11.96 
 % Relative Standard Deviation = 33.5 
 Number of Observations = 51 
 Blind Sample ID = 5083/5089  Mean = 20.41 
 % Relative Standard Deviation = 28.2 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6785  Mean = 13.33 
 % Relative Standard Deviation = 43.3 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 33DW/6711  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 = 11.67 
 % Relative Standard Deviation = 35.0 
 Number of Observations = 6 
 Blind Sample ID = 3383/6785  Mean = 15.00 
 % Relative Standard Deviation = 35.1 
 Number of Observations = 10 
 Blind Sample ID = 3381/6783  Mean = 11.43 
 % Relative Standard Deviation = 33.1 
 Number of Observations = 7 
 Blind Sample ID = 25DW/7597  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  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 = 13.75 
 % Relative Standard Deviation = 36.4 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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 = 30.22 
 % Relative Standard Deviation = 19.3 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 16.15 
 % Relative Standard Deviation = 31.3 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Lead, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01051, MCode: CX017
Dates: 03/29/85 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 = 20.17 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 36 
 Blind Sample ID = ST91  Mean = 2.76 
 % Relative Standard Deviation = 59.4 
 Number of Observations = 21 
 Blind Sample ID = ST89  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 = 5.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 2.43 
 % Relative Standard Deviation = 66.6 
 Number of Observations = 7 
 Blind Sample ID = 5089/50DW  Mean = 3.50 
 % Relative Standard Deviation = 74.0 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 7.20 
 % Relative Standard Deviation = 49.5 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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 = 5.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 3399/67DW  Mean = 7.40 
 % Relative Standard Deviation = 36.5 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7503  Mean = 12.50 
 % Relative Standard Deviation = 109.8 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Lead, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01051, MCode: GF100
Dates: 05/08/89 through 09/30/91
Open Data Set

 Mean = 10.73 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  Mean = 22.15 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 13 
 Blind Sample ID = 5011/5007  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 = 1.33 
 % Relative Standard Deviation = 43.3 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  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
The SGPlot Procedure



- Lithium, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01130, MCode: AA021
Dates: 08/25/86 through 07/24/91
Open Data Set

 Mean = 112.96 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 27 
 Blind Sample ID = 5007/5003  Mean = 50.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = 5003/5001  Mean = 70.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 15 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Lithium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01130, MCode: PLA11
Dates: 04/24/85 through 09/30/91
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 = 109.60 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 120.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  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 = 19.38 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 29 
 Blind Sample ID = 5085/5091  Mean = 53.09 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 45 
 Blind Sample ID = 5083/5089  Mean = 107.92 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 20.50 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6785  Mean = 32.67 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  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 = 34.50 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 6 
 Blind Sample ID = 3383/6785  Mean = 191.00 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 10 
 Blind Sample ID = 3381/6783  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 = 100.25 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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 = 29.13 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 77.85 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 242.86 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Lithium, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01132, MCode: AA057
Dates: 10/14/86 through 09/23/91
Open Data Set

 Mean = 240.00 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 8 
 Blind Sample ID = STS2  Mean = 120.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = STS1  Mean = 180.00 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 6 
 Blind Sample ID = ST99  Mean = 20.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 33.68 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 19 
 Blind Sample ID = 50DW/5001  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
The SGPlot Procedure



- Manganese, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01056, MCode: AA025
Dates: 03/29/85 through 07/19/91
Open Data Set

 Mean = 80.00 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 2302.56 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 21 
 Blind Sample ID = ST89  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 = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/50DW  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 47 
 Blind Sample ID = 5089/50DW  Mean = 53.33 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 50.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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 = 20.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6797  Mean = 62.50 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6787  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 = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 14 
 Blind Sample ID = 33DW/6703  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 = 1722.03 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 59 
 Blind Sample ID = 25DW/7591  Mean = 397.00 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 24 
 Blind Sample ID = 25DW/7503  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = 2589/7587  Mean = 70.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  Mean = 147.50 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 12 
 Blind Sample ID = 2581/7587  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 2510/7504  Mean = 66.88 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Manganese, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01056, MCode: PLA11
Dates: 04/24/85 through 09/30/91
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 = 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 = 1190.00 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 30 
 Blind Sample ID = 5085/5091  Mean = 130.65 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 46 
 Blind Sample ID = 5083/5089  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 = 63.58 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 12 
 Blind Sample ID = 33DW/6785  Mean = 176.67 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  Mean = 6.64 
 % Relative Standard Deviation = 36.5 
 Number of Observations = 28 
 Blind Sample ID = 33DW/6703  Mean = 156.67 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 6 
 Blind Sample ID = 3383/6785  Mean = 370.00 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 10 
 Blind Sample ID = 3381/6783  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 = 57.69 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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 = 39.21 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 42 
 Blind Sample ID = 2501/7509  Mean = 67.92 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 280.00 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Manganese, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01055, MCode: AA060
Dates: 03/29/85 through 09/23/91
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 = 2323.08 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 11.90 
 % Relative Standard Deviation = 33.8 
 Number of Observations = 21 
 Blind Sample ID = ST89  Mean = 30.56 
 % Relative Standard Deviation = 20.9 
 Number of Observations = 18 
 Blind Sample ID = 50DW/5001  Mean = 56.00 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 5 
 Blind Sample ID = 5097/5099  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 16.25 
 % Relative Standard Deviation = 86.6 
 Number of Observations = 8 
 Blind Sample ID = 5089/50DW  Mean = 61.67 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 58.00 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  Mean = 20.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5003/5097  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 = 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 = 77.50 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Mercury, FIL,CVAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 71890, MCode: CV013
Dates: 07/05/85 through 09/30/91
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 = 0.97 
 % Relative Standard Deviation = 33.4 
 Number of Observations = 25 
 Blind Sample ID = ST91  Mean = 0.67 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 3 
 Blind Sample ID = ST89  Mean = 3.50 
 % Relative Standard Deviation = 16.7 
 Number of Observations = 5 
 Blind Sample ID = ST85  Mean = 0.24 
 % Relative Standard Deviation = 27.1 
 Number of Observations = 24 
 Blind Sample ID = 5089/50DW  Mean = 0.11 
 % Relative Standard Deviation = 30.4 
 Number of Observations = 16 
 Blind Sample ID = 5011/50DW  Mean = 1.51 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 13 
 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 = 2.28 
 % Relative Standard Deviation = 28.6 
 Number of Observations = 6 
 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 = 0.60 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  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 = 1.15 
 % Relative Standard Deviation = 41.6 
 Number of Observations = 17 
 Blind Sample ID = 25DW/7591  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 = 0.85 
 % Relative Standard Deviation = 57.8 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 0.10 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 2589/7587  Mean = 0.35 
 % Relative Standard Deviation = 16.5 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  Mean = 0.59 
 % Relative Standard Deviation = 14.2 
 Number of Observations = 8 
 Blind Sample ID = 2581/7587  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: 03/29/85 through 09/30/91
Open Data Set

 Mean = 0.14 
 % Relative Standard Deviation = 67.8 
 Number of Observations = 11 
 Blind Sample ID = ST99  Mean = 0.10 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 18 
 Blind Sample ID = ST93  Mean = 0.90 
 % Relative Standard Deviation = 31.9 
 Number of Observations = 28 
 Blind Sample ID = ST91  Mean = 0.75 
 % Relative Standard Deviation = 23.1 
 Number of Observations = 4 
 Blind Sample ID = ST89  Mean = 1.04 
 % Relative Standard Deviation = 64.7 
 Number of Observations = 25 
 Blind Sample ID = 50DW/5001  Mean = 0.34 
 % Relative Standard Deviation = 31.4 
 Number of Observations = 8 
 Blind Sample ID = 5089/50DW  Mean = 1.93 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 4 
 Blind Sample ID = 5085/50DW  Mean = 3.10 
 % Relative Standard Deviation = 30.8 
 Number of Observations = 3 
 Blind Sample ID = 5085/5087  Mean = 1.44 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 13 
 Blind Sample ID = 5011/5007  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 = 0.10 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = 3309/67DW  Mean = 1.33 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 19 
 Blind Sample ID = 3305/67DW  Mean = 0.20 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = 25DW/7511  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 = 0.45 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Molybdenum, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01060, MCode: PLA11
Dates: 04/24/85 through 09/30/91
Open Data Set

 Mean = 36.00 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 21.25 
 % Relative Standard Deviation = 16.6 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 35.00 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 15.60 
 % Relative Standard Deviation = 32.5 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  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 = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 30 
 Blind Sample ID = 5085/5091  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 58 
 Blind Sample ID = 5083/5089  Mean = 11.02 
 % Relative Standard Deviation = 27.8 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6785  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  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 = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = 3383/6785  Mean = 17.00 
 % Relative Standard Deviation = 28.4 
 Number of Observations = 10 
 Blind Sample ID = 3381/6783  Mean = 28.00 
 % Relative Standard Deviation = 17.9 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  Mean = 12.14 
 % Relative Standard Deviation = 47.7 
 Number of Observations = 14 
 Blind Sample ID = 25DW/7511  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7507  Mean = 24.21 
 % Relative Standard Deviation = 28.6 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7503  Mean = 35.63 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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 = 92.89 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 26.15 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 18.57 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Molybdenum, FIL,CXAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01060, MCode: CX009
Dates: 04/18/85 through 09/26/91
Open Data Set

 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 = 4.03 
 % Relative Standard Deviation = 54.8 
 Number of Observations = 39 
 Blind Sample ID = 5089/50DW  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 = 7.57 
 % 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 = 2.08 
 % Relative Standard Deviation = 57.2 
 Number of Observations = 59 
 Blind Sample ID = 25DW/7591  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 = 3.75 
 % Relative Standard Deviation = 48.4 
 Number of Observations = 12 
 Blind Sample ID = 2589/7587  Mean = 11.50 
 % Relative Standard Deviation = 44.3 
 Number of Observations = 12 
 Blind Sample ID = 2581/7587  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,CXAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01062, MCode: CX018
Dates: 10/14/86 through 09/23/91
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 = 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
The SGPlot Procedure



- Nickel, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01065, MCode: CX010
Dates: 03/29/85 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 = 22.31 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 18.52 
 % Relative Standard Deviation = 16.8 
 Number of Observations = 23 
 Blind Sample ID = ST89  Mean = 2.93 
 % Relative Standard Deviation = 72.3 
 Number of Observations = 15 
 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 = 9.36 
 % Relative Standard Deviation = 37.6 
 Number of Observations = 47 
 Blind Sample ID = 5089/50DW  Mean = 3.33 
 % Relative Standard Deviation = 49.0 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 4.00 
 % Relative Standard Deviation = 39.5 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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 = 4.48 
 % Relative Standard Deviation = 39.1 
 Number of Observations = 21 
 Blind Sample ID = 33DW/6785  Mean = 7.75 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6783  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 = 17.03 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 59 
 Blind Sample ID = 25DW/7591  Mean = 9.20 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 10 
 Blind Sample ID = 25DW/7575  Mean = 6.55 
 % Relative Standard Deviation = 37.0 
 Number of Observations = 11 
 Blind Sample ID = 2589/7587  Mean = 4.50 
 % Relative Standard Deviation = 22.2 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  Mean = 2.17 
 % Relative Standard Deviation = 83.1 
 Number of Observations = 12 
 Blind Sample ID = 2581/7587
The SGPlot Procedure



- Nickel, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01065, MCode: GF090
Dates: 05/15/89 through 09/30/91
Open Data Set

 Mean = 7.73 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 21.14 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 14 
 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 = 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 = 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
The SGPlot Procedure



- Nickel, FIL, GFAA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01065, MCode: GF081
Dates: 11/24/89 through 08/23/91
Open Data Set

 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 = 9.17 
 % Relative Standard Deviation = 31.9 
 Number of Observations = 6 
 Blind Sample ID = 2501/75DW
The SGPlot Procedure



- Nickel, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01065, MCode: PLA11
Dates: 08/10/87 through 09/30/91
Open Data Set

 Mean = 11.11 
 % Relative Standard Deviation = 28.7 
 Number of Observations = 36 
 Blind Sample ID = ST97  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 10.40 
 % Relative Standard Deviation = 19.2 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 10.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  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 = 21.22 
 % Relative Standard Deviation = 22.8 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 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 = 51.56 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 17.69 
 % Relative Standard Deviation = 24.8 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Nickel, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01067, MCode: CX019
Dates: 03/29/85 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 = 23.76 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 38 
 Blind Sample ID = ST91  Mean = 20.62 
 % Relative Standard Deviation = 25.1 
 Number of Observations = 21 
 Blind Sample ID = ST89  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 = 16.88 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 8 
 Blind Sample ID = 5089/50DW  Mean = 6.00 
 % Relative Standard Deviation = 40.8 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 8.00 
 % Relative Standard Deviation = 87.9 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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  Mean = 6.00 
 % Relative Standard Deviation = 36.0 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Nickel, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01067, MCode: GF101
Dates: 05/08/89 through 09/30/91
Open Data Set

 Mean = 15.33 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  Mean = 23.91 
 % Relative Standard Deviation = 20.2 
 Number of Observations = 11 
 Blind Sample ID = 5011/5007  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 = 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
The SGPlot Procedure



- Selenium, FIL, Hydride, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01145, MCode: HY011
Dates: 03/29/85 through 09/30/91
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 = 5.62 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 25.91 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 22 
 Blind Sample ID = ST89  Mean = 3.46 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 13 
 Blind Sample ID = ST85  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 = 2.17 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 3.40 
 % Relative Standard Deviation = 16.1 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  Mean = 7.69 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 13 
 Blind Sample ID = 5011/5007  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 = 2.73 
 % Relative Standard Deviation = 23.1 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6785  Mean = 3.25 
 % Relative Standard Deviation = 29.5 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6783  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 = 3.86 
 % 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 = 9.06 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  Mean = 2.50 
 % Relative Standard Deviation = 40.0 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  Mean = 7.17 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 23 
 Blind Sample ID = 2505/7501
The SGPlot Procedure



- Selenium, UNF, GFAA-EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01147, MCode: GF073
Dates: 05/17/91 through 09/23/91
Open Data Set

 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: 03/29/85 through 09/30/91
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 = 5.85 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 26.48 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 21 
 Blind Sample ID = ST89  Mean = 3.68 
 % Relative Standard Deviation = 27.2 
 Number of Observations = 19 
 Blind Sample ID = 50DW/5001  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 = 2.33 
 % Relative Standard Deviation = 22.1 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 3.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5085/5087  Mean = 8.08 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 13 
 Blind Sample ID = 5011/5007  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 = 4.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  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 = 4.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID = 3399/67DW  Mean = 2.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 21 
 Blind Sample ID = 3305/67DW  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 = 3.00 
 % Relative Standard Deviation = 27.2 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  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: 03/29/85 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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 3.92 
 % Relative Standard Deviation = 22.9 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 1.05 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 22 
 Blind Sample ID = ST89  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = 5089/50DW  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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 = 1.09 
 % Relative Standard Deviation = 27.0 
 Number of Observations = 22 
 Blind Sample ID = 33DW/6785  Mean = 1.75 
 % Relative Standard Deviation = 54.7 
 Number of Observations = 4 
 Blind Sample ID = 33DW/6783  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  Mean = 2.36 
 % Relative Standard Deviation = 21.3 
 Number of Observations = 11 
 Blind Sample ID = 25DW/7503  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Silver, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01075, MCode: GF092
Dates: 05/12/89 through 09/30/91
Open Data Set

 Mean = 12.00 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 14 
 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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 23 
 Blind Sample ID = 33DW/6705  Mean = 1.11 
 % Relative Standard Deviation = 30.0 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6703  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 21 
 Blind Sample ID = 3305/67DW  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 = 3.13 
 % Relative Standard Deviation = 19.8 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01075, MCode: PLA11
Dates: 08/10/87 through 09/30/91
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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = ST81  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 = 13.67 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 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 = 3.11 
 % Relative Standard Deviation = 24.9 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 2.92 
 % Relative Standard Deviation = 26.0 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Silver, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01077, MCode: CX020
Dates: 03/29/85 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 = 4.13 
 % Relative Standard Deviation = 28.8 
 Number of Observations = 38 
 Blind Sample ID = ST91  Mean = 1.29 
 % Relative Standard Deviation = 85.7 
 Number of Observations = 21 
 Blind Sample ID = ST89  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID = 5089/50DW  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 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 = 3.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7503  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587
The SGPlot Procedure



- Silver, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01077, MCode: GF103
Dates: 05/08/89 through 09/30/91
Open Data Set

 Mean = 2.00 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 15 
 Blind Sample ID = 50DW/5001  Mean = 12.08 
 % Relative Standard Deviation = 15.7 
 Number of Observations = 13 
 Blind Sample ID = 5011/5007  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 = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 21 
 Blind Sample ID = 33DW/6705  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 3399/67DW  Mean = 1.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 17 
 Blind Sample ID = 3305/67DW  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
The SGPlot Procedure



- Strontium, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01080, MCode: AA038
Dates: 01/11/90 through 07/24/91
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 = 1500.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 16 
 Blind Sample ID = 2501/7505
The SGPlot Procedure



- Strontium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01080, MCode: PLA11
Dates: 04/24/85 through 09/30/91
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 = 1200.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 120.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 439.17 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 2000.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  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 = 678.00 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 30 
 Blind Sample ID = 5085/5091  Mean = 901.74 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 46 
 Blind Sample ID = 5083/5089  Mean = 111.22 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 793.64 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 11 
 Blind Sample ID = 33DW/6785  Mean = 76.67 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  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 = 855.00 
 % Relative Standard Deviation = 1.0 
 Number of Observations = 6 
 Blind Sample ID = 3383/6785  Mean = 229.00 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 10 
 Blind Sample ID = 3381/6783  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 = 1881.25 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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 = 489.78 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 1446.15 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 225.71 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Vanadium, FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01085, MCode: CL067
Dates: 09/09/89 through 09/23/91
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 = 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 = 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 = 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
The SGPlot Procedure



- Vanadium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01085, MCode: PLA11
Dates: 04/24/85 through 09/30/91
Open Data Set

 Mean = 6.31 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 65 
 Blind Sample ID = ST97  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 17 
 Blind Sample ID = ST95  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = ST93  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = ST85  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID = ST83  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 12 
 Blind Sample ID = ST81  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 25 
 Blind Sample ID = 5099/5093  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = 5099/5083  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 = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 41 
 Blind Sample ID = 5093/5087  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 30 
 Blind Sample ID = 5085/5091  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 59 
 Blind Sample ID = 5083/5089  Mean = 20.41 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 27 
 Blind Sample ID = 33DW/6797  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 45 
 Blind Sample ID = 33DW/6793  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 13 
 Blind Sample ID = 33DW/6785  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 33DW/6783  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 = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = 3383/6785  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 10 
 Blind Sample ID = 3381/6783  Mean = 6.04 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 25 
 Blind Sample ID = 25DW/7597  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 19 
 Blind Sample ID = 25DW/7595  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 = 13.50 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 16 
 Blind Sample ID = 2599/7501  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 = 25.07 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 8.00 
 % Relative Standard Deviation = 16.1 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 6.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Zinc, FIL, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01090, MCode: AA039
Dates: 04/08/85 through 09/30/91
Open Data Set

 Mean = 37.50 
 % Relative Standard Deviation = 18.9 
 Number of Observations = 8 
 Blind Sample ID = ST99  Mean = 5607.69 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 34.29 
 % Relative Standard Deviation = 19.7 
 Number of Observations = 21 
 Blind Sample ID = ST89  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 = 20.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5095/5087  Mean = 24.77 
 % Relative Standard Deviation = 32.0 
 Number of Observations = 44 
 Blind Sample ID = 5089/50DW  Mean = 70.00 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 6 
 Blind Sample ID = 5085/50DW  Mean = 62.50 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 4 
 Blind Sample ID = 5085/5087  Mean = 158.67 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 15 
 Blind Sample ID = 5011/50DW  Mean = 196.92 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 13 
 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 = 90.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = 5003/5097  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 = 20.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = 33DW/6793  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 = 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 = 4218.64 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 59 
 Blind Sample ID = 25DW/7591  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 = 25.45 
 % Relative Standard Deviation = 27.0 
 Number of Observations = 11 
 Blind Sample ID = 2589/7587  Mean = 55.00 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 4 
 Blind Sample ID = 2583/7587  Mean = 45.71 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 7 
 Blind Sample ID = 2581/7587  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-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01090, MCode: PLA11
Dates: 04/24/85 through 09/30/91
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 = 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 = 2850.00 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 30 
 Blind Sample ID = 5085/5091  Mean = 81.85 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 39 
 Blind Sample ID = 5083/5089  Mean = 195.92 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 49 
 Blind Sample ID = 5011/5007  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 = 76.11 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 9 
 Blind Sample ID = 33DW/6785  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 = 126.00 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 5 
 Blind Sample ID = 3383/6785  Mean = 123.33 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 9 
 Blind Sample ID = 3381/6783  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 = 61.60 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 15 
 Blind Sample ID = 2599/7501  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 = 72.04 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 45 
 Blind Sample ID = 2501/7509  Mean = 82.62 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 13 
 Blind Sample ID = 2501/7505  Mean = 54.00 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 4 
 Blind Sample ID =
The SGPlot Procedure



- Zinc, UNF, AA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01092, MCode: AA071
Dates: 03/29/85 through 09/30/91
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 = 5607.69 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 39 
 Blind Sample ID = ST91  Mean = 38.13 
 % Relative Standard Deviation = 23.9 
 Number of Observations = 16 
 Blind Sample ID = ST89  Mean = 35.00 
 % Relative Standard Deviation = 26.4 
 Number of Observations = 18 
 Blind Sample ID = 50DW/5001  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 = 30.00 
 % Relative Standard Deviation = 47.1 
 Number of Observations = 5 
 Blind Sample ID = 5089/50DW  Mean = 62.50 
 % Relative Standard Deviation = 20.1 
 Number of Observations = 4 
 Blind Sample ID = 5085/50DW  Mean = 64.00 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 5 
 Blind Sample ID = 5085/5087  Mean = 192.31 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 13 
 Blind Sample ID = 5011/5007  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 = 80.00 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 5001/5007  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 = 11.67 
 % Relative Standard Deviation = 35.0 
 Number of Observations = 6 
 Blind Sample ID = 3399/67DW  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
The SGPlot Procedure