- Ammonia (NH4 as N), FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00608, MCode: CL035
Dates: 12/03/84 through 09/30/94
Open Data Set

 Mean = 0.36 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 20 
 Blind Sample ID = N9  Mean = 0.16 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 14 
 Blind Sample ID = N8  Mean = 1.65 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 25 
 Blind Sample ID = N7  Mean = 0.43 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 29 
 Blind Sample ID = N5  Mean = 1.24 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 76 
 Blind Sample ID = N41  Mean = 0.05 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 67 
 Blind Sample ID = N40  Mean = 1.07 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 46 
 Blind Sample ID = N4  Mean = 0.93 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 72 
 Blind Sample ID = N39  Mean = 0.09 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 71 
 Blind Sample ID = N38  Mean = 0.90 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 93 
 Blind Sample ID = N37  Mean = 0.13 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 83 
 Blind Sample ID = N36  Mean = 0.91 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 132 
 Blind Sample ID = N35  Mean = 0.20 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 122 
 Blind Sample ID = N34  Mean = 1.33 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 50 
 Blind Sample ID = N33  Mean = 0.05 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 47 
 Blind Sample ID = N32  Mean = 0.59 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 71 
 Blind Sample ID = N31  Mean = 0.22 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 69 
 Blind Sample ID = N30  Mean = 3.19 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 21 
 Blind Sample ID = N3  Mean = 0.99 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 66 
 Blind Sample ID = N29  Mean = 0.09 
 % Relative Standard Deviation = 23.5 
 Number of Observations = 73 
 Blind Sample ID = N28  Mean = 0.89 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 38 
 Blind Sample ID = N27  Mean = 0.13 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 56 
 Blind Sample ID = N26  Mean = 1.90 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 51 
 Blind Sample ID = N24  Mean = 0.48 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 61 
 Blind Sample ID = N23  Mean = 0.21 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 19 
 Blind Sample ID = N21  Mean = 0.72 
 % Relative Standard Deviation = 0.8 
 Number of Observations = 3 
 Blind Sample ID = N20  Mean = 1.00 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 26 
 Blind Sample ID = N18  Mean = 0.02 
 % Relative Standard Deviation = 41.5 
 Number of Observations = 13 
 Blind Sample ID = N17  Mean = 3.64 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 36 
 Blind Sample ID = N16  Mean = 0.55 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 71 
 Blind Sample ID = N15  Mean = 0.63 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 32 
 Blind Sample ID = N14  Mean = 0.22 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 22 
 Blind Sample ID = N13  Mean = 0.11 
 % Relative Standard Deviation = 40.5 
 Number of Observations = 39 
 Blind Sample ID = N12  Mean = 0.86 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 23 
 Blind Sample ID = N10  Mean = 0.36 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 13 
 Blind Sample ID = F9  Mean = 1.99 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 35 
 Blind Sample ID = F7  Mean = 3.40 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 25 
 Blind Sample ID = F3  Mean = 0.57 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 16 
 Blind Sample ID = F15  Mean = 0.70 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 8 
 Blind Sample ID = F14  Mean = 0.70 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 16 
 Blind Sample ID = F10  Mean = 0.13 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 39 
 Blind Sample ID = C19  Mean = 0.98 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 67 
 Blind Sample ID = C18  Mean = 0.73 
 % Relative Standard Deviation = 100.0 
 Number of Observations = 161 
 Blind Sample ID =
The SGPlot Procedure



- Ammonia (NH4 as N), FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00608, MCode: CL037
Dates: 10/11/94 through 09/27/96
Open Data Set

 Mean = 0.74 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 54 
 Blind Sample ID = N48  Mean = 0.20 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 56 
 Blind Sample ID = N47  Mean = 1.05 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 77 
 Blind Sample ID = N46  Mean = 0.08 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 62 
 Blind Sample ID = N45  Mean = 0.91 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 74 
 Blind Sample ID = N44  Mean = 0.10 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 80 
 Blind Sample ID = N43  Mean = 1.09 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 10 
 Blind Sample ID = N42
The SGPlot Procedure



- Ammonia (NH4 as N), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00608, MCode: CL038
Dates: 04/10/85 through 09/28/94
Open Data Set

 Mean = 0.03 
 % Relative Standard Deviation = 50.3 
 Number of Observations = 22 
 Blind Sample ID = P8  Mean = 0.01 
 % Relative Standard Deviation = 113.0 
 Number of Observations = 5 
 Blind Sample ID = P5  Mean = 0.04 
 % Relative Standard Deviation = 48.3 
 Number of Observations = 6 
 Blind Sample ID = P3  Mean = 0.18 
 % Relative Standard Deviation = 30.4 
 Number of Observations = 15 
 Blind Sample ID = P15  Mean = 0.01 
 % Relative Standard Deviation = 37.3 
 Number of Observations = 6 
 Blind Sample ID = P14  Mean = 0.02 
 % Relative Standard Deviation = 38.4 
 Number of Observations = 27 
 Blind Sample ID = P13  Mean = 0.02 
 % Relative Standard Deviation = 83.0 
 Number of Observations = 16 
 Blind Sample ID = P12  Mean = 0.28 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 17 
 Blind Sample ID = P11  Mean = 0.03 
 % Relative Standard Deviation = 22.1 
 Number of Observations = 36 
 Blind Sample ID = N40  Mean = 0.08 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 33 
 Blind Sample ID = N38  Mean = 0.13 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 24 
 Blind Sample ID = N36  Mean = 0.21 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 30 
 Blind Sample ID = N34  Mean = 0.06 
 % Relative Standard Deviation = 31.2 
 Number of Observations = 16 
 Blind Sample ID = N32  Mean = 0.25 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 4 
 Blind Sample ID = N30  Mean = 0.01 
 % Relative Standard Deviation = 58.3 
 Number of Observations = 5 
 Blind Sample ID = 88 /200  Mean = 0.03 
 % Relative Standard Deviation = 68.3 
 Number of Observations = 7 
 Blind Sample ID =
The SGPlot Procedure



- Ammonia (NH4 as N), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00608, MCode: CL039
Dates: 11/03/94 through 09/20/96
Open Data Set

 Mean = 0.19 
 % Relative Standard Deviation = 17.9 
 Number of Observations = 5 
 Blind Sample ID = N47  Mean = 1.06 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 14 
 Blind Sample ID = N46  Mean = 0.07 
 % Relative Standard Deviation = 21.2 
 Number of Observations = 4 
 Blind Sample ID = N45  Mean = 0.10 
 % Relative Standard Deviation = 19.9 
 Number of Observations = 63 
 Blind Sample ID = N43
The SGPlot Procedure



- Ammonia (NH4 as N), FIL, EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00608, MCode: CL036
Dates: 03/04/96 through 09/06/96
Open Data Set

 Mean = 0.70 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 4 
 Blind Sample ID = N48
The SGPlot Procedure



- Ammonia (NH4 as N), UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00610, MCode: CL070
Dates: 01/03/85 through 10/15/92
Open Data Set

 Mean = 0.06 
 % Relative Standard Deviation = 33.9 
 Number of Observations = 4 
 Blind Sample ID = P9  Mean = 0.02 
 % Relative Standard Deviation = 63.3 
 Number of Observations = 12 
 Blind Sample ID = P8  Mean = 0.01 
 % Relative Standard Deviation = 86.8 
 Number of Observations = 6 
 Blind Sample ID = P5  Mean = 0.06 
 % Relative Standard Deviation = 22.3 
 Number of Observations = 3 
 Blind Sample ID = P3  Mean = 0.22 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 5 
 Blind Sample ID = P15  Mean = 0.01 
 % Relative Standard Deviation = 36.0 
 Number of Observations = 5 
 Blind Sample ID = P14  Mean = 0.02 
 % Relative Standard Deviation = 42.3 
 Number of Observations = 11 
 Blind Sample ID = P13  Mean = 0.02 
 % Relative Standard Deviation = 56.8 
 Number of Observations = 14 
 Blind Sample ID = P12  Mean = 0.22 
 % Relative Standard Deviation = 16.1 
 Number of Observations = 32 
 Blind Sample ID = P11  Mean = 0.19 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 11 
 Blind Sample ID = N34  Mean = 0.05 
 % Relative Standard Deviation = 43.1 
 Number of Observations = 9 
 Blind Sample ID = N32  Mean = 0.01 
 % Relative Standard Deviation = 88.2 
 Number of Observations = 6 
 Blind Sample ID = 84 /200  Mean = 0.02 
 % Relative Standard Deviation = 60.5 
 Number of Observations = 16 
 Blind Sample ID =
The SGPlot Procedure



- Ammonia (NH4 as N), UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00610, MCode: CL075
Dates: 12/03/84 through 09/25/92
Open Data Set

 Mean = 0.36 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 20 
 Blind Sample ID = N9  Mean = 0.16 
 % Relative Standard Deviation = 21.2 
 Number of Observations = 14 
 Blind Sample ID = N8  Mean = 1.68 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 25 
 Blind Sample ID = N7  Mean = 0.43 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 29 
 Blind Sample ID = N5  Mean = 1.06 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 47 
 Blind Sample ID = N4  Mean = 0.88 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 35 
 Blind Sample ID = N35  Mean = 0.20 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 39 
 Blind Sample ID = N34  Mean = 1.32 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 44 
 Blind Sample ID = N33  Mean = 0.06 
 % Relative Standard Deviation = 29.4 
 Number of Observations = 50 
 Blind Sample ID = N32  Mean = 0.60 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 58 
 Blind Sample ID = N31  Mean = 0.23 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 58 
 Blind Sample ID = N30  Mean = 3.22 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 21 
 Blind Sample ID = N3  Mean = 0.99 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 57 
 Blind Sample ID = N29  Mean = 0.08 
 % Relative Standard Deviation = 20.6 
 Number of Observations = 63 
 Blind Sample ID = N28  Mean = 0.87 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 49 
 Blind Sample ID = N27  Mean = 0.13 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 36 
 Blind Sample ID = N26  Mean = 1.89 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 35 
 Blind Sample ID = N24  Mean = 0.49 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 30 
 Blind Sample ID = N23  Mean = 0.21 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 37 
 Blind Sample ID = N21  Mean = 0.72 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 62 
 Blind Sample ID = N20  Mean = 1.03 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 57 
 Blind Sample ID = N18  Mean = 0.03 
 % Relative Standard Deviation = 67.6 
 Number of Observations = 21 
 Blind Sample ID = N17  Mean = 3.72 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 47 
 Blind Sample ID = N16  Mean = 0.55 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 87 
 Blind Sample ID = N15  Mean = 0.64 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 33 
 Blind Sample ID = N14  Mean = 0.23 
 % Relative Standard Deviation = 16.4 
 Number of Observations = 22 
 Blind Sample ID = N13  Mean = 0.11 
 % Relative Standard Deviation = 37.5 
 Number of Observations = 39 
 Blind Sample ID = N12  Mean = 0.85 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 23 
 Blind Sample ID = N10  Mean = 0.41 
 % Relative Standard Deviation = 27.5 
 Number of Observations = 9 
 Blind Sample ID = F9  Mean = 1.99 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 29 
 Blind Sample ID = F7  Mean = 1.18 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 36 
 Blind Sample ID = F4  Mean = 3.48 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 34 
 Blind Sample ID = F3  Mean = 0.29 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 20 
 Blind Sample ID = F2  Mean = 0.57 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 25 
 Blind Sample ID = F15  Mean = 0.66 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 14 
 Blind Sample ID = F14  Mean = 0.19 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 40 
 Blind Sample ID = F13  Mean = 0.70 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 16 
 Blind Sample ID = F10  Mean = 0.13 
 % Relative Standard Deviation = 15.8 
 Number of Observations = 45 
 Blind Sample ID = C19  Mean = 0.99 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 20 
 Blind Sample ID = C18  Mean = 0.04 
 % Relative Standard Deviation = 66.1 
 Number of Observations = 6 
 Blind Sample ID = 50115-50103  Mean = 0.75 
 % Relative Standard Deviation = 102.7 
 Number of Observations = 165 
 Blind Sample ID =
The SGPlot Procedure



- Ammonia+Organic-N, FIL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00623, MCode: CL051
Dates: 12/03/84 through 09/26/91
Open Data Set

 Mean = 1.48 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 20 
 Blind Sample ID = N9  Mean = 0.51 
 % Relative Standard Deviation = 23.9 
 Number of Observations = 14 
 Blind Sample ID = N8  Mean = 3.16 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 25 
 Blind Sample ID = N7  Mean = 1.31 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 28 
 Blind Sample ID = N5  Mean = 2.47 
 % Relative Standard Deviation = 20.1 
 Number of Observations = 48 
 Blind Sample ID = N4  Mean = 0.82 
 % Relative Standard Deviation = 16.5 
 Number of Observations = 24 
 Blind Sample ID = N31  Mean = 0.42 
 % Relative Standard Deviation = 37.2 
 Number of Observations = 56 
 Blind Sample ID = N30  Mean = 3.76 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 21 
 Blind Sample ID = N3  Mean = 1.25 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 26 
 Blind Sample ID = N29  Mean = 0.28 
 % Relative Standard Deviation = 38.9 
 Number of Observations = 68 
 Blind Sample ID = N28  Mean = 1.16 
 % Relative Standard Deviation = 17.4 
 Number of Observations = 34 
 Blind Sample ID = N27  Mean = 0.34 
 % Relative Standard Deviation = 30.6 
 Number of Observations = 25 
 Blind Sample ID = N26  Mean = 2.37 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 28 
 Blind Sample ID = N24  Mean = 0.86 
 % Relative Standard Deviation = 20.6 
 Number of Observations = 52 
 Blind Sample ID = N23  Mean = 0.65 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 19 
 Blind Sample ID = N21  Mean = 1.43 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 3 
 Blind Sample ID = N20  Mean = 1.58 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 26 
 Blind Sample ID = N18  Mean = 0.46 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 12 
 Blind Sample ID = N17  Mean = 4.37 
 % Relative Standard Deviation = 22.4 
 Number of Observations = 38 
 Blind Sample ID = N16  Mean = 1.19 
 % Relative Standard Deviation = 26.7 
 Number of Observations = 72 
 Blind Sample ID = N15  Mean = 1.31 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 32 
 Blind Sample ID = N14  Mean = 0.52 
 % Relative Standard Deviation = 15.3 
 Number of Observations = 22 
 Blind Sample ID = N13  Mean = 0.70 
 % Relative Standard Deviation = 22.7 
 Number of Observations = 39 
 Blind Sample ID = N12  Mean = 1.63 
 % Relative Standard Deviation = 23.1 
 Number of Observations = 23 
 Blind Sample ID = N10  Mean = 1.83 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 12 
 Blind Sample ID = F9  Mean = 3.48 
 % Relative Standard Deviation = 23.5 
 Number of Observations = 36 
 Blind Sample ID = F7  Mean = 3.66 
 % Relative Standard Deviation = 18.4 
 Number of Observations = 26 
 Blind Sample ID = F3  Mean = 1.45 
 % Relative Standard Deviation = 15.9 
 Number of Observations = 16 
 Blind Sample ID = F15  Mean = 1.44 
 % Relative Standard Deviation = 60.0 
 Number of Observations = 8 
 Blind Sample ID = F14  Mean = 1.13 
 % Relative Standard Deviation = 17.9 
 Number of Observations = 16 
 Blind Sample ID = F10  Mean = 1.78 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 5 
 Blind Sample ID = C19  Mean = 1.62 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 67 
 Blind Sample ID = C18  Mean = 1.61 
 % Relative Standard Deviation = 62.4 
 Number of Observations = 163 
 Blind Sample ID =
The SGPlot Procedure



- Ammonia+Organic-N, FIL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00623, MCode: KJ016
Dates: 10/12/84 through 04/02/85
Open Data Set

 Mean = 1.74 
 % Relative Standard Deviation = 54.9 
 Number of Observations = 66 
 Blind Sample ID =
The SGPlot Procedure



- Ammonia+Organic-N, FIL, ASF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00623, MCode: CL061
Dates: 10/04/91 through 09/30/94
Open Data Set

 Mean = 1.69 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 76 
 Blind Sample ID = N41  Mean = 0.20 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 68 
 Blind Sample ID = N40  Mean = 1.01 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 73 
 Blind Sample ID = N39  Mean = 0.20 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 71 
 Blind Sample ID = N38  Mean = 1.05 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 74 
 Blind Sample ID = N37  Mean = 0.22 
 % Relative Standard Deviation = 37.2 
 Number of Observations = 64 
 Blind Sample ID = N36  Mean = 0.98 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 100 
 Blind Sample ID = N35  Mean = 0.25 
 % Relative Standard Deviation = 35.9 
 Number of Observations = 90 
 Blind Sample ID = N34  Mean = 1.39 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 35 
 Blind Sample ID = N33  Mean = 0.20 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 28 
 Blind Sample ID = N32  Mean = 0.73 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 4 
 Blind Sample ID = N31  Mean = 0.24 
 % Relative Standard Deviation = 32.4 
 Number of Observations = 7 
 Blind Sample ID = N30
The SGPlot Procedure



- Ammonia+Organic-N, UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00625, MCode: CL083
Dates: 12/03/84 through 09/26/91
Open Data Set

 Mean = 1.55 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 20 
 Blind Sample ID = N9  Mean = 0.59 
 % Relative Standard Deviation = 19.9 
 Number of Observations = 14 
 Blind Sample ID = N8  Mean = 3.27 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 25 
 Blind Sample ID = N7  Mean = 1.32 
 % Relative Standard Deviation = 23.9 
 Number of Observations = 29 
 Blind Sample ID = N5  Mean = 2.49 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 48 
 Blind Sample ID = N4  Mean = 0.84 
 % Relative Standard Deviation = 17.2 
 Number of Observations = 49 
 Blind Sample ID = N31  Mean = 0.39 
 % Relative Standard Deviation = 30.5 
 Number of Observations = 50 
 Blind Sample ID = N30  Mean = 3.75 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 21 
 Blind Sample ID = N3  Mean = 1.31 
 % Relative Standard Deviation = 13.7 
 Number of Observations = 57 
 Blind Sample ID = N29  Mean = 0.26 
 % Relative Standard Deviation = 36.5 
 Number of Observations = 63 
 Blind Sample ID = N28  Mean = 1.15 
 % Relative Standard Deviation = 16.4 
 Number of Observations = 49 
 Blind Sample ID = N27  Mean = 0.35 
 % Relative Standard Deviation = 44.9 
 Number of Observations = 35 
 Blind Sample ID = N26  Mean = 2.30 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 35 
 Blind Sample ID = N24  Mean = 0.91 
 % Relative Standard Deviation = 27.4 
 Number of Observations = 31 
 Blind Sample ID = N23  Mean = 0.62 
 % Relative Standard Deviation = 39.8 
 Number of Observations = 36 
 Blind Sample ID = N21  Mean = 1.40 
 % Relative Standard Deviation = 26.8 
 Number of Observations = 62 
 Blind Sample ID = N20  Mean = 1.61 
 % Relative Standard Deviation = 17.0 
 Number of Observations = 57 
 Blind Sample ID = N18  Mean = 0.43 
 % Relative Standard Deviation = 24.6 
 Number of Observations = 21 
 Blind Sample ID = N17  Mean = 4.88 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 45 
 Blind Sample ID = N16  Mean = 1.28 
 % Relative Standard Deviation = 37.6 
 Number of Observations = 85 
 Blind Sample ID = N15  Mean = 1.33 
 % Relative Standard Deviation = 27.1 
 Number of Observations = 32 
 Blind Sample ID = N14  Mean = 0.54 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 21 
 Blind Sample ID = N13  Mean = 0.73 
 % Relative Standard Deviation = 24.6 
 Number of Observations = 39 
 Blind Sample ID = N12  Mean = 1.93 
 % Relative Standard Deviation = 28.0 
 Number of Observations = 21 
 Blind Sample ID = N10  Mean = 1.63 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 9 
 Blind Sample ID = F9  Mean = 3.54 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 29 
 Blind Sample ID = F7  Mean = 2.74 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 36 
 Blind Sample ID = F4  Mean = 3.87 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 33 
 Blind Sample ID = F3  Mean = 1.35 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 21 
 Blind Sample ID = F2  Mean = 1.51 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 25 
 Blind Sample ID = F15  Mean = 1.24 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 14 
 Blind Sample ID = F14  Mean = 0.79 
 % Relative Standard Deviation = 33.6 
 Number of Observations = 36 
 Blind Sample ID = F13  Mean = 1.15 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 16 
 Blind Sample ID = F10  Mean = 1.60 
 % Relative Standard Deviation = 23.3 
 Number of Observations = 45 
 Blind Sample ID = C19  Mean = 1.81 
 % Relative Standard Deviation = 15.3 
 Number of Observations = 20 
 Blind Sample ID = C18  Mean = 1.64 
 % Relative Standard Deviation = 61.0 
 Number of Observations = 164 
 Blind Sample ID =
The SGPlot Procedure



- Ammonia+Organic-N, UNF, ASF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00625, MCode: KJ006
Dates: 10/04/91 through 09/25/92
Open Data Set

 Mean = 0.98 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 35 
 Blind Sample ID = N35  Mean = 0.25 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 39 
 Blind Sample ID = N34  Mean = 1.41 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 45 
 Blind Sample ID = N33  Mean = 0.20 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 50 
 Blind Sample ID = N32  Mean = 0.71 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 9 
 Blind Sample ID = N31  Mean = 0.33 
 % Relative Standard Deviation = 51.9 
 Number of Observations = 7 
 Blind Sample ID = N30  Mean = 0.95 
 % Relative Standard Deviation = 52.3 
 Number of Observations = 6 
 Blind Sample ID = 50115-50103
The SGPlot Procedure



- Ammonia+Organic-N, UNF, EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00625, MCode: KJ007
Dates: 02/20/96 through 09/20/96
Open Data Set

 Mean = 1.32 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 11 
 Blind Sample ID = N48  Mean = 1.78 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 4 
 Blind Sample ID = N46
The SGPlot Procedure



- Kjeldahl Nitrogen (NH4+org N as N), FIL, CFA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00623, MCode: KJ002
Dates: 10/11/94 through 09/27/96
Open Data Set

 Mean = 1.23 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 55 
 Blind Sample ID = N48  Mean = 1.79 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 70 
 Blind Sample ID = N46  Mean = 0.20 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 9 
 Blind Sample ID = N45  Mean = 1.19 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 50 
 Blind Sample ID = N44  Mean = 0.20 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 81 
 Blind Sample ID = N43  Mean = 1.63 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 10 
 Blind Sample ID = N42
The SGPlot Procedure



- Kjeldahl Nitrogen (NH4+org N as N), FIL, CFA, ACD -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00623, MCode: KJ003
Dates: 02/20/96 through 09/20/96
Open Data Set

 Mean = 1.29 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 10 
 Blind Sample ID = N48  Mean = 1.80 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 4 
 Blind Sample ID = N46
The SGPlot Procedure



- Kjeldahl Nitrogen (NH4+org N as N), UNF, CFA, ACD -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00625, MCode: KJ008
Dates: 11/03/94 through 09/27/96
Open Data Set

 Mean = 0.40 
 % Relative Standard Deviation = 15.8 
 Number of Observations = 56 
 Blind Sample ID = N47  Mean = 1.73 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 7 
 Blind Sample ID = N46  Mean = 0.22 
 % Relative Standard Deviation = 18.5 
 Number of Observations = 73 
 Blind Sample ID = N45  Mean = 1.15 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 24 
 Blind Sample ID = N44  Mean = 0.21 
 % Relative Standard Deviation = 18.2 
 Number of Observations = 50 
 Blind Sample ID = N43
The SGPlot Procedure



- Nitrate plus Nitrite (NO3+NO2 as N), FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: CL045
Dates: 12/03/84 through 09/30/94
Open Data Set

 Mean = 3.70 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 5 
 Blind Sample ID = ST88  Mean = 0.10 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = P8  Mean = 4.52 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 20 
 Blind Sample ID = N9  Mean = 0.49 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 13 
 Blind Sample ID = N8  Mean = 3.50 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 25 
 Blind Sample ID = N7  Mean = 4.83 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 28 
 Blind Sample ID = N5  Mean = 1.23 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 76 
 Blind Sample ID = N41  Mean = 0.12 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 68 
 Blind Sample ID = N40  Mean = 2.29 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 47 
 Blind Sample ID = N4  Mean = 0.91 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 72 
 Blind Sample ID = N39  Mean = 0.22 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 71 
 Blind Sample ID = N38  Mean = 0.86 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 93 
 Blind Sample ID = N37  Mean = 0.18 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 86 
 Blind Sample ID = N36  Mean = 0.98 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 132 
 Blind Sample ID = N35  Mean = 0.21 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 123 
 Blind Sample ID = N34  Mean = 0.60 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 50 
 Blind Sample ID = N33  Mean = 0.13 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 47 
 Blind Sample ID = N32  Mean = 1.42 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 71 
 Blind Sample ID = N31  Mean = 0.41 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 68 
 Blind Sample ID = N30  Mean = 4.94 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 21 
 Blind Sample ID = N3  Mean = 1.15 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 65 
 Blind Sample ID = N29  Mean = 0.34 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 74 
 Blind Sample ID = N28  Mean = 1.60 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 38 
 Blind Sample ID = N27  Mean = 0.29 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 54 
 Blind Sample ID = N26  Mean = 1.75 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 48 
 Blind Sample ID = N24  Mean = 0.93 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 57 
 Blind Sample ID = N23  Mean = 0.58 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 19 
 Blind Sample ID = N21  Mean = 1.57 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 25 
 Blind Sample ID = N18  Mean = 1.04 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 13 
 Blind Sample ID = N17  Mean = 2.73 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 36 
 Blind Sample ID = N16  Mean = 0.95 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 71 
 Blind Sample ID = N15  Mean = 1.22 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 32 
 Blind Sample ID = N14  Mean = 0.38 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 22 
 Blind Sample ID = N13  Mean = 3.73 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 39 
 Blind Sample ID = N12  Mean = 2.56 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 23 
 Blind Sample ID = N10  Mean = 4.54 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 13 
 Blind Sample ID = F9  Mean = 3.42 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 36 
 Blind Sample ID = F7  Mean = 4.97 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 26 
 Blind Sample ID = F3  Mean = 0.99 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 16 
 Blind Sample ID = F15  Mean = 1.20 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = F14  Mean = 1.30 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 16 
 Blind Sample ID = F10  Mean = 3.63 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 38 
 Blind Sample ID = C19  Mean = 1.46 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 65 
 Blind Sample ID = C18  Mean = 0.59 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 10 
 Blind Sample ID = 50M6/50DW  Mean = 1.32 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 6 
 Blind Sample ID = 50M2/50DW  Mean = 0.38 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 6 
 Blind Sample ID = 50DW/5098  Mean = 0.80 
 % Relative Standard Deviation = 43.2 
 Number of Observations = 6 
 Blind Sample ID = 50DW/5096  Mean = 0.16 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 8 
 Blind Sample ID = 50DW/5090  Mean = 1.82 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 5 
 Blind Sample ID = 50DW/5088  Mean = 0.10 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5082  Mean = 0.10 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 18 
 Blind Sample ID = 50DW/5008  Mean = 1.19 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 13 
 Blind Sample ID = 50DW/5004  Mean = 0.33 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5000  Mean = 0.43 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 7 
 Blind Sample ID = 5098/50DW  Mean = 1.60 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 6 
 Blind Sample ID = 5098/5004  Mean = 2.72 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 4 
 Blind Sample ID = 5094/50M6  Mean = 2.26 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 13 
 Blind Sample ID = 5094/50M4  Mean = 1.64 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 7 
 Blind Sample ID = 5094/5082  Mean = 1.47 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 11 
 Blind Sample ID = 5090/50M2  Mean = 2.02 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 10 
 Blind Sample ID = 5090/5088  Mean = 3.45 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 12 
 Blind Sample ID = 5086/50M2  Mean = 3.87 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 3 
 Blind Sample ID = 5084/5088  Mean = 0.10 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 13 
 Blind Sample ID = 5010/5008  Mean = 1.28 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 15 
 Blind Sample ID = 5010/5004  Mean = 1.50 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 13 
 Blind Sample ID = 5006/5004  Mean = 1.20 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 23 
 Blind Sample ID = 5004/50DW  Mean = 2.57 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 7 
 Blind Sample ID = 5002/5004  Mean = 0.75 
 % Relative Standard Deviation = 19.3 
 Number of Observations = 12 
 Blind Sample ID = 5000/5098  Mean = 1.30 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 6 
 Blind Sample ID = 5000/5096  Mean = 1.68 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 6 
 Blind Sample ID = 5000/5002  Mean = 0.86 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 4 
 Blind Sample ID = 33M2/67DW  Mean = 3.20 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 6 
 Blind Sample ID = 25M4/7594  Mean = 0.86 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 5 
 Blind Sample ID = 25M2/7590  Mean = 0.53 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 5 
 Blind Sample ID = 25DW/7580  Mean = 1.94 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 5 
 Blind Sample ID = 2594/75M6  Mean = 2.53 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 3 
 Blind Sample ID = 2594/7596  Mean = 2.07 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 3 
 Blind Sample ID = 2590/75M2  Mean = 3.97 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 3 
 Blind Sample ID = 2588/7586  Mean = 4.04 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 9 
 Blind Sample ID = 2588/7584  Mean = 0.77 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 5 
 Blind Sample ID = 2500/7598  Mean = 2.69 
 % Relative Standard Deviation = 58.1 
 Number of Observations = 163 
 Blind Sample ID =
The SGPlot Procedure



- Nitrate plus Nitrite (NO3+NO2 as N), FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: CL048
Dates: 10/11/94 through 09/27/96
Open Data Set

 Mean = 0.75 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 52 
 Blind Sample ID = N48  Mean = 0.23 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 56 
 Blind Sample ID = N47  Mean = 1.22 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 76 
 Blind Sample ID = N46  Mean = 0.27 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 82 
 Blind Sample ID = N45  Mean = 0.78 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 73 
 Blind Sample ID = N44  Mean = 0.14 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 80 
 Blind Sample ID = N43  Mean = 1.90 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 10 
 Blind Sample ID = N42
The SGPlot Procedure



- Nitrate plus Nitrite (NO3+NO2 as N), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: CL049
Dates: 10/08/91 through 09/28/94
Open Data Set

 Mean = 0.11 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 36 
 Blind Sample ID = N40  Mean = 0.20 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 33 
 Blind Sample ID = N38  Mean = 0.17 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 24 
 Blind Sample ID = N36  Mean = 0.20 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 30 
 Blind Sample ID = N34  Mean = 0.11 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 16 
 Blind Sample ID = N32  Mean = 0.45 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 4 
 Blind Sample ID = N30
The SGPlot Procedure



- Nitrate plus Nitrite (NO3+NO2 as N), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: CL050
Dates: 11/03/94 through 09/20/96
Open Data Set

 Mean = 0.22 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 5 
 Blind Sample ID = N47  Mean = 1.24 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 14 
 Blind Sample ID = N46  Mean = 0.27 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 6 
 Blind Sample ID = N45  Mean = 0.14 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 59 
 Blind Sample ID = N43
The SGPlot Procedure



- Nitrate plus Nitrite (NO3+NO2 as N), FIL, EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: CL047
Dates: 02/20/96 through 09/20/96
Open Data Set

 Mean = 0.70 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 10 
 Blind Sample ID = N48  Mean = 1.23 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 4 
 Blind Sample ID = N46
The SGPlot Procedure



- Nitrate plus Nitrite (NO3+NO2 as N), UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00630, MCode: CL001
Dates: 10/08/91 through 10/15/92
Open Data Set

 Mean = 0.20 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 11 
 Blind Sample ID = N34  Mean = 0.11 
 % Relative Standard Deviation = 25.2 
 Number of Observations = 9 
 Blind Sample ID = N32
The SGPlot Procedure



- Nitrate plus Nitrite (NO3+NO2 as N), UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00630, MCode: CL081
Dates: 12/03/84 through 09/25/92
Open Data Set

 Mean = 4.52 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 20 
 Blind Sample ID = N9  Mean = 0.49 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 13 
 Blind Sample ID = N8  Mean = 3.50 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 25 
 Blind Sample ID = N7  Mean = 4.83 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 28 
 Blind Sample ID = N5  Mean = 2.29 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 47 
 Blind Sample ID = N4  Mean = 0.97 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 35 
 Blind Sample ID = N35  Mean = 0.20 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 39 
 Blind Sample ID = N34  Mean = 0.58 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 44 
 Blind Sample ID = N33  Mean = 0.13 
 % Relative Standard Deviation = 16.3 
 Number of Observations = 50 
 Blind Sample ID = N32  Mean = 1.42 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 59 
 Blind Sample ID = N31  Mean = 0.40 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 58 
 Blind Sample ID = N30  Mean = 4.94 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 21 
 Blind Sample ID = N3  Mean = 1.13 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 57 
 Blind Sample ID = N29  Mean = 0.33 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 62 
 Blind Sample ID = N28  Mean = 1.58 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 45 
 Blind Sample ID = N27  Mean = 0.29 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 36 
 Blind Sample ID = N26  Mean = 1.74 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 35 
 Blind Sample ID = N24  Mean = 0.90 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 30 
 Blind Sample ID = N23  Mean = 0.54 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 37 
 Blind Sample ID = N21  Mean = 0.76 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 8 
 Blind Sample ID = N20  Mean = 1.60 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 55 
 Blind Sample ID = N18  Mean = 1.07 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 21 
 Blind Sample ID = N17  Mean = 2.77 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 48 
 Blind Sample ID = N16  Mean = 0.97 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 86 
 Blind Sample ID = N15  Mean = 1.22 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 33 
 Blind Sample ID = N14  Mean = 0.38 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 22 
 Blind Sample ID = N13  Mean = 3.73 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 39 
 Blind Sample ID = N12  Mean = 2.56 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 23 
 Blind Sample ID = N10  Mean = 4.47 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 9 
 Blind Sample ID = F9  Mean = 3.47 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 29 
 Blind Sample ID = F7  Mean = 2.26 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 36 
 Blind Sample ID = F4  Mean = 4.95 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 34 
 Blind Sample ID = F3  Mean = 1.34 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 20 
 Blind Sample ID = F2  Mean = 1.00 
 % Relative Standard Deviation = 0.7 
 Number of Observations = 25 
 Blind Sample ID = F15  Mean = 1.19 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 14 
 Blind Sample ID = F14  Mean = 0.27 
 % Relative Standard Deviation = 17.2 
 Number of Observations = 40 
 Blind Sample ID = F13  Mean = 1.30 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 16 
 Blind Sample ID = F10  Mean = 3.60 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 43 
 Blind Sample ID = C19  Mean = 1.47 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 19 
 Blind Sample ID = C18  Mean = 2.50 
 % Relative Standard Deviation = 76.4 
 Number of Observations = 6 
 Blind Sample ID = 50115-50103  Mean = 2.73 
 % Relative Standard Deviation = 56.8 
 Number of Observations = 165 
 Blind Sample ID =
The SGPlot Procedure



- Nitrite (NO2 as N), FIL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00613, MCode: CL111
Dates: 10/15/84 through 03/06/85
Open Data Set

 Mean = 0.37 
 % Relative Standard Deviation = 47.8 
 Number of Observations = 11 
 Blind Sample ID =
The SGPlot Procedure



- Nitrite (NO2 as N), FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00613, MCode: CL040
Dates: 03/11/85 through 09/30/94
Open Data Set

 Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = P8  Mean = 0.22 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 13 
 Blind Sample ID = N9  Mean = 0.49 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 25 
 Blind Sample ID = N7  Mean = 0.34 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 76 
 Blind Sample ID = N41  Mean = 0.03 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 68 
 Blind Sample ID = N40  Mean = 0.23 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 73 
 Blind Sample ID = N39  Mean = 0.07 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 71 
 Blind Sample ID = N38  Mean = 0.26 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 93 
 Blind Sample ID = N37  Mean = 0.05 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 86 
 Blind Sample ID = N36  Mean = 0.05 
 % Relative Standard Deviation = 26.7 
 Number of Observations = 133 
 Blind Sample ID = N35  Mean = 0.01 
 % Relative Standard Deviation = 45.1 
 Number of Observations = 124 
 Blind Sample ID = N34  Mean = 0.02 
 % Relative Standard Deviation = 33.6 
 Number of Observations = 50 
 Blind Sample ID = N33  Mean = 0.01 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 47 
 Blind Sample ID = N32  Mean = 0.09 
 % Relative Standard Deviation = 31.2 
 Number of Observations = 72 
 Blind Sample ID = N31  Mean = 0.06 
 % Relative Standard Deviation = 24.4 
 Number of Observations = 69 
 Blind Sample ID = N30  Mean = 2.26 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 21 
 Blind Sample ID = N3  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 34 
 Blind Sample ID = N28  Mean = 0.48 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 18 
 Blind Sample ID = N27  Mean = 0.05 
 % Relative Standard Deviation = 30.6 
 Number of Observations = 45 
 Blind Sample ID = N26  Mean = 0.07 
 % Relative Standard Deviation = 64.6 
 Number of Observations = 38 
 Blind Sample ID = N24  Mean = 0.21 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 48 
 Blind Sample ID = N23  Mean = 0.02 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = N20  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = N18  Mean = 0.06 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 11 
 Blind Sample ID = N17  Mean = 1.14 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 18 
 Blind Sample ID = N16  Mean = 0.04 
 % Relative Standard Deviation = 21.6 
 Number of Observations = 43 
 Blind Sample ID = N15  Mean = 0.08 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 5 
 Blind Sample ID = N14  Mean = 0.02 
 % Relative Standard Deviation = 38.5 
 Number of Observations = 4 
 Blind Sample ID = N12  Mean = 0.01 
 % Relative Standard Deviation = 37.3 
 Number of Observations = 5 
 Blind Sample ID = N10  Mean = 0.20 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 13 
 Blind Sample ID = F9  Mean = 0.49 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 35 
 Blind Sample ID = F7  Mean = 2.27 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 26 
 Blind Sample ID = F3  Mean = 0.09 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 4 
 Blind Sample ID = F10  Mean = 0.25 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 34 
 Blind Sample ID = C19  Mean = 0.07 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 53 
 Blind Sample ID = C18  Mean = 0.80 
 % Relative Standard Deviation = 107.8 
 Number of Observations = 36 
 Blind Sample ID =
The SGPlot Procedure



- Nitrite (NO2 as N), FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00613, MCode: CL041
Dates: 10/11/94 through 09/27/96
Open Data Set

 Mean = 0.05 
 % Relative Standard Deviation = 21.7 
 Number of Observations = 55 
 Blind Sample ID = N48  Mean = 0.01 
 % Relative Standard Deviation = 48.4 
 Number of Observations = 70 
 Blind Sample ID = N46  Mean = 0.02 
 % Relative Standard Deviation = 30.0 
 Number of Observations = 9 
 Blind Sample ID = N45  Mean = 0.13 
 % Relative Standard Deviation = 57.2 
 Number of Observations = 50 
 Blind Sample ID = N44  Mean = 0.03 
 % Relative Standard Deviation = 19.1 
 Number of Observations = 30 
 Blind Sample ID = N43  Mean = 0.43 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 10 
 Blind Sample ID = N42
The SGPlot Procedure



- Nitrite (NO2 as N), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00613, MCode: CL042
Dates: 10/08/91 through 09/28/94
Open Data Set

 Mean = 0.03 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 36 
 Blind Sample ID = N40  Mean = 0.07 
 % Relative Standard Deviation = 21.5 
 Number of Observations = 34 
 Blind Sample ID = N38  Mean = 0.05 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 24 
 Blind Sample ID = N36  Mean = 0.01 
 % Relative Standard Deviation = 64.1 
 Number of Observations = 30 
 Blind Sample ID = N34  Mean = 0.01 
 % Relative Standard Deviation = 24.8 
 Number of Observations = 16 
 Blind Sample ID = N32  Mean = 0.06 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 4 
 Blind Sample ID = N30
The SGPlot Procedure



- Nitrite (NO2 as N), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00613, MCode: CL043
Dates: 11/03/94 through 09/20/96
Open Data Set

 Mean = 0.02 
 % Relative Standard Deviation = 59.1 
 Number of Observations = 6 
 Blind Sample ID = N47  Mean = 0.02 
 % Relative Standard Deviation = 28.2 
 Number of Observations = 14 
 Blind Sample ID = N46  Mean = 0.01 
 % Relative Standard Deviation = 54.9 
 Number of Observations = 6 
 Blind Sample ID = N45  Mean = 0.03 
 % Relative Standard Deviation = 26.4 
 Number of Observations = 65 
 Blind Sample ID = N43
The SGPlot Procedure



- Nitrite (NO2 as N), UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00615, MCode: CL076
Dates: 03/11/85 through 09/25/92
Open Data Set

 Mean = 0.22 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 13 
 Blind Sample ID = N9  Mean = 0.06 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = N8  Mean = 0.49 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 25 
 Blind Sample ID = N7  Mean = 0.07 
 % Relative Standard Deviation = 23.3 
 Number of Observations = 35 
 Blind Sample ID = N35  Mean = 0.01 
 % Relative Standard Deviation = 38.5 
 Number of Observations = 39 
 Blind Sample ID = N34  Mean = 0.02 
 % Relative Standard Deviation = 40.9 
 Number of Observations = 44 
 Blind Sample ID = N33  Mean = 0.01 
 % Relative Standard Deviation = 44.3 
 Number of Observations = 50 
 Blind Sample ID = N32  Mean = 0.08 
 % Relative Standard Deviation = 33.0 
 Number of Observations = 59 
 Blind Sample ID = N31  Mean = 0.06 
 % Relative Standard Deviation = 25.7 
 Number of Observations = 59 
 Blind Sample ID = N30  Mean = 2.26 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 21 
 Blind Sample ID = N3  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 46 
 Blind Sample ID = N28  Mean = 0.48 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 30 
 Blind Sample ID = N27  Mean = 0.05 
 % Relative Standard Deviation = 42.5 
 Number of Observations = 28 
 Blind Sample ID = N26  Mean = 0.06 
 % Relative Standard Deviation = 71.0 
 Number of Observations = 21 
 Blind Sample ID = N24  Mean = 0.21 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 27 
 Blind Sample ID = N23  Mean = 0.02 
 % Relative Standard Deviation = 45.1 
 Number of Observations = 61 
 Blind Sample ID = N20  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 29 
 Blind Sample ID = N18  Mean = 0.06 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 10 
 Blind Sample ID = N17  Mean = 1.17 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 7 
 Blind Sample ID = N16  Mean = 0.05 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 52 
 Blind Sample ID = N15  Mean = 0.08 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 15 
 Blind Sample ID = N14  Mean = 0.04 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 8 
 Blind Sample ID = N13  Mean = 0.01 
 % Relative Standard Deviation = 24.2 
 Number of Observations = 15 
 Blind Sample ID = N12  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = N10  Mean = 0.19 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 9 
 Blind Sample ID = F9  Mean = 0.49 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 29 
 Blind Sample ID = F7  Mean = 2.28 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 34 
 Blind Sample ID = F3  Mean = 0.05 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 8 
 Blind Sample ID = F15  Mean = 0.07 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 8 
 Blind Sample ID = F14  Mean = 0.09 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 4 
 Blind Sample ID = F10  Mean = 0.25 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 44 
 Blind Sample ID = C19  Mean = 0.07 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 6 
 Blind Sample ID = C18  Mean = 0.05 
 % Relative Standard Deviation = 46.1 
 Number of Observations = 6 
 Blind Sample ID = 50115-50103  Mean = 0.74 
 % Relative Standard Deviation = 106.8 
 Number of Observations = 59 
 Blind Sample ID =
The SGPlot Procedure



- Nitrite (NO2 as N), UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00615, MCode: CL077
Dates: 10/08/91 through 10/15/92
Open Data Set

 Mean = 0.01 
 % Relative Standard Deviation = 43.9 
 Number of Observations = 11 
 Blind Sample ID = N34  Mean = 0.01 
 % Relative Standard Deviation = 31.5 
 Number of Observations = 9 
 Blind Sample ID = N32
The SGPlot Procedure



- Nitrite (NO2 as N), UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00615, MCode: CL110
Dates: 10/12/84 through 03/06/85
Open Data Set

 Mean = 0.46 
 % Relative Standard Deviation = 85.1 
 Number of Observations = 19 
 Blind Sample ID =
The SGPlot Procedure



- Orthophosphate (PO4 as P), FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00671, MCode: CL053
Dates: 10/11/94 through 09/27/96
Open Data Set

 Mean = 0.60 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 54 
 Blind Sample ID = N48  Mean = 0.89 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 76 
 Blind Sample ID = N46  Mean = 0.92 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 78 
 Blind Sample ID = N44  Mean = 0.10 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 79 
 Blind Sample ID = N43  Mean = 1.09 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 10 
 Blind Sample ID = N42
The SGPlot Procedure



- Orthophosphate (PO4 as P), FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00671, MCode: CL054
Dates: 01/03/85 through 09/30/94
Open Data Set

 Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 4 
 Blind Sample ID = P8  Mean = 1.08 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 13 
 Blind Sample ID = N9  Mean = 0.24 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 3 
 Blind Sample ID = N8  Mean = 0.34 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 25 
 Blind Sample ID = N7  Mean = 1.21 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 75 
 Blind Sample ID = N41  Mean = 0.05 
 % Relative Standard Deviation = 15.3 
 Number of Observations = 68 
 Blind Sample ID = N40  Mean = 0.90 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 72 
 Blind Sample ID = N39  Mean = 0.08 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 71 
 Blind Sample ID = N38  Mean = 1.09 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 93 
 Blind Sample ID = N37  Mean = 0.21 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 86 
 Blind Sample ID = N36  Mean = 0.91 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 132 
 Blind Sample ID = N35  Mean = 0.20 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 122 
 Blind Sample ID = N34  Mean = 0.83 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 50 
 Blind Sample ID = N33  Mean = 0.09 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 47 
 Blind Sample ID = N32  Mean = 1.49 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 64 
 Blind Sample ID = N31  Mean = 0.24 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 69 
 Blind Sample ID = N30  Mean = 1.24 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 21 
 Blind Sample ID = N3  Mean = 0.51 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 66 
 Blind Sample ID = N29  Mean = 0.14 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 74 
 Blind Sample ID = N28  Mean = 1.09 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 31 
 Blind Sample ID = N27  Mean = 0.21 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 48 
 Blind Sample ID = N26  Mean = 1.09 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 37 
 Blind Sample ID = N24  Mean = 0.48 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 59 
 Blind Sample ID = N23  Mean = 0.34 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 19 
 Blind Sample ID = N21  Mean = 0.47 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 3 
 Blind Sample ID = N20  Mean = 0.07 
 % Relative Standard Deviation = 21.7 
 Number of Observations = 8 
 Blind Sample ID = N18  Mean = 0.22 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 11 
 Blind Sample ID = N17  Mean = 1.34 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 16 
 Blind Sample ID = N16  Mean = 0.19 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 50 
 Blind Sample ID = N15  Mean = 0.35 
 % Relative Standard Deviation = 23.6 
 Number of Observations = 9 
 Blind Sample ID = N14  Mean = 0.11 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 10 
 Blind Sample ID = N13  Mean = 0.54 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 13 
 Blind Sample ID = N12  Mean = 1.04 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 5 
 Blind Sample ID = N10  Mean = 4.28 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 13 
 Blind Sample ID = F9  Mean = 0.33 
 % Relative Standard Deviation = 16.9 
 Number of Observations = 35 
 Blind Sample ID = F7  Mean = 1.25 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 26 
 Blind Sample ID = F3  Mean = 0.99 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 7 
 Blind Sample ID = F15  Mean = 0.33 
 % Relative Standard Deviation = 25.5 
 Number of Observations = 7 
 Blind Sample ID = F14  Mean = 0.62 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 4 
 Blind Sample ID = F10  Mean = 0.08 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 39 
 Blind Sample ID = C19  Mean = 0.08 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 53 
 Blind Sample ID = C18  Mean = 0.63 
 % Relative Standard Deviation = 71.5 
 Number of Observations = 61 
 Blind Sample ID =
The SGPlot Procedure



- Orthophosphate (PO4 as P), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00671, MCode: CL057
Dates: 11/03/94 through 09/27/95
Open Data Set

 Mean = 0.93 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 13 
 Blind Sample ID = N46  Mean = 0.10 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 55 
 Blind Sample ID = N43
The SGPlot Procedure



- Orthophosphate (PO4 as P), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00671, MCode: CL058
Dates: 10/21/91 through 09/28/94
Open Data Set

 Mean = 0.06 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 36 
 Blind Sample ID = N40  Mean = 0.08 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 33 
 Blind Sample ID = N38  Mean = 0.21 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 23 
 Blind Sample ID = N36  Mean = 0.20 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 30 
 Blind Sample ID = N34  Mean = 0.09 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 15 
 Blind Sample ID = N32
The SGPlot Procedure



- Orthophosphate (PO4 as P), FIL, IC, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00671, MCode: IC024
Dates: 11/26/85 through 09/13/90
Open Data Set

 Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 29 
 Blind Sample ID = P8  Mean = 0.01 
 % Relative Standard Deviation = 27.6 
 Number of Observations = 11 
 Blind Sample ID = P5  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 9 
 Blind Sample ID = P3  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 18 
 Blind Sample ID = P13  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 28 
 Blind Sample ID = P12  Mean = 0.01 
 % Relative Standard Deviation = 34.7 
 Number of Observations = 49 
 Blind Sample ID = P11  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 88 /200  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 6 
 Blind Sample ID = 84 /200  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 10 
 Blind Sample ID =
The SGPlot Procedure



- Orthophosphate-P, UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 70507, MCode: 00145
Dates: 10/17/91 through 10/15/92
Open Data Set

 Mean = 0.20 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 11 
 Blind Sample ID = N34  Mean = 0.10 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 8 
 Blind Sample ID = N32
The SGPlot Procedure



- Orthophosphate-P, UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 70507, MCode: CL085
Dates: 03/11/85 through 09/25/92
Open Data Set

 Mean = 1.07 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 13 
 Blind Sample ID = N9  Mean = 0.24 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 3 
 Blind Sample ID = N8  Mean = 0.34 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 25 
 Blind Sample ID = N7  Mean = 0.89 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 35 
 Blind Sample ID = N35  Mean = 0.19 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 39 
 Blind Sample ID = N34  Mean = 0.83 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 44 
 Blind Sample ID = N33  Mean = 0.09 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 50 
 Blind Sample ID = N32  Mean = 1.50 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 55 
 Blind Sample ID = N31  Mean = 0.23 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 58 
 Blind Sample ID = N30  Mean = 1.27 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 21 
 Blind Sample ID = N3  Mean = 0.50 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 57 
 Blind Sample ID = N29  Mean = 0.14 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 63 
 Blind Sample ID = N28  Mean = 1.06 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 22 
 Blind Sample ID = N27  Mean = 0.21 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 13 
 Blind Sample ID = N26  Mean = 1.09 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 15 
 Blind Sample ID = N24  Mean = 0.48 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 14 
 Blind Sample ID = N23  Mean = 0.08 
 % Relative Standard Deviation = 24.9 
 Number of Observations = 14 
 Blind Sample ID = N18  Mean = 0.23 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 10 
 Blind Sample ID = N17  Mean = 1.48 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 8 
 Blind Sample ID = N16  Mean = 0.20 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 41 
 Blind Sample ID = N15  Mean = 0.37 
 % Relative Standard Deviation = 19.7 
 Number of Observations = 7 
 Blind Sample ID = N14  Mean = 0.11 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 10 
 Blind Sample ID = N13  Mean = 0.53 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 13 
 Blind Sample ID = N12  Mean = 1.02 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 5 
 Blind Sample ID = N10  Mean = 4.22 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 9 
 Blind Sample ID = F9  Mean = 0.33 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 29 
 Blind Sample ID = F7  Mean = 1.28 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 34 
 Blind Sample ID = F3  Mean = 0.99 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 7 
 Blind Sample ID = F15  Mean = 0.34 
 % Relative Standard Deviation = 16.7 
 Number of Observations = 8 
 Blind Sample ID = F14  Mean = 0.64 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 4 
 Blind Sample ID = F10  Mean = 0.08 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 45 
 Blind Sample ID = C19  Mean = 0.07 
 % Relative Standard Deviation = 166.7 
 Number of Observations = 6 
 Blind Sample ID = 50115-50103  Mean = 0.68 
 % Relative Standard Deviation = 65.7 
 Number of Observations = 59 
 Blind Sample ID =
The SGPlot Procedure



- Phosphorus (as P), FIL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: CL052
Dates: 12/03/84 through 09/26/91
Open Data Set

 Mean = 0.53 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 4 
 Blind Sample ID = ST88  Mean = 1.47 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 20 
 Blind Sample ID = N9  Mean = 0.33 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 3 
 Blind Sample ID = N8  Mean = 1.02 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 23 
 Blind Sample ID = N7  Mean = 0.77 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 28 
 Blind Sample ID = N5  Mean = 2.60 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 38 
 Blind Sample ID = N4  Mean = 1.55 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 24 
 Blind Sample ID = N31  Mean = 0.27 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 59 
 Blind Sample ID = N30  Mean = 1.48 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 20 
 Blind Sample ID = N3  Mean = 0.54 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 26 
 Blind Sample ID = N29  Mean = 0.17 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 67 
 Blind Sample ID = N28  Mean = 1.16 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 30 
 Blind Sample ID = N27  Mean = 0.35 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 24 
 Blind Sample ID = N26  Mean = 1.41 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 27 
 Blind Sample ID = N24  Mean = 0.58 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 54 
 Blind Sample ID = N23  Mean = 0.49 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 19 
 Blind Sample ID = N21  Mean = 0.65 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 3 
 Blind Sample ID = N20  Mean = 0.09 
 % Relative Standard Deviation = 16.8 
 Number of Observations = 8 
 Blind Sample ID = N18  Mean = 0.41 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 13 
 Blind Sample ID = N17  Mean = 2.32 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 31 
 Blind Sample ID = N16  Mean = 0.81 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 52 
 Blind Sample ID = N15  Mean = 0.68 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 29 
 Blind Sample ID = N14  Mean = 0.21 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 10 
 Blind Sample ID = N13  Mean = 0.81 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 26 
 Blind Sample ID = N12  Mean = 1.43 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 23 
 Blind Sample ID = N10  Mean = 4.85 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 13 
 Blind Sample ID = F9  Mean = 0.99 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 36 
 Blind Sample ID = F7  Mean = 1.56 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 25 
 Blind Sample ID = F3  Mean = 1.30 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 14 
 Blind Sample ID = F15  Mean = 0.68 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 7 
 Blind Sample ID = F14  Mean = 0.70 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 15 
 Blind Sample ID = F10  Mean = 0.76 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 5 
 Blind Sample ID = C19  Mean = 0.38 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 67 
 Blind Sample ID = C18  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 9 
 Blind Sample ID = 50M6/50DW  Mean = 0.24 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 6 
 Blind Sample ID = 50M2/50DW  Mean = 0.01 
 % Relative Standard Deviation = 39.1 
 Number of Observations = 5 
 Blind Sample ID = 50DW/5098  Mean = 0.20 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 6 
 Blind Sample ID = 50DW/5096  Mean = 0.01 
 % Relative Standard Deviation = 56.6 
 Number of Observations = 8 
 Blind Sample ID = 50DW/5090  Mean = 0.26 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5088  Mean = 0.08 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 17 
 Blind Sample ID = 50DW/5008  Mean = 0.49 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 13 
 Blind Sample ID = 50DW/5004  Mean = 0.01 
 % Relative Standard Deviation = 40.0 
 Number of Observations = 4 
 Blind Sample ID = 50DW/5000  Mean = 0.02 
 % Relative Standard Deviation = 34.2 
 Number of Observations = 5 
 Blind Sample ID = 5098/50DW  Mean = 0.50 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 5 
 Blind Sample ID = 5098/5004  Mean = 0.60 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 4 
 Blind Sample ID = 5094/50M6  Mean = 0.61 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 12 
 Blind Sample ID = 5094/50M4  Mean = 0.63 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 7 
 Blind Sample ID = 5094/5082  Mean = 0.51 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 10 
 Blind Sample ID = 5086/50M2  Mean = 0.10 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 13 
 Blind Sample ID = 5010/5008  Mean = 0.50 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 15 
 Blind Sample ID = 5010/5004  Mean = 0.53 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 10 
 Blind Sample ID = 5006/5004  Mean = 0.49 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 24 
 Blind Sample ID = 5004/50DW  Mean = 0.74 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 6 
 Blind Sample ID = 5002/5004  Mean = 0.02 
 % Relative Standard Deviation = 41.4 
 Number of Observations = 9 
 Blind Sample ID = 5000/5098  Mean = 0.19 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 5 
 Blind Sample ID = 5000/5096  Mean = 0.22 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 6 
 Blind Sample ID = 5000/5002  Mean = 0.58 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 4 
 Blind Sample ID = 25DW/7580  Mean = 1.06 
 % Relative Standard Deviation = 70.8 
 Number of Observations = 132 
 Blind Sample ID =
The SGPlot Procedure



- Phosphorus (as P), FIL, ASF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: CL061
Dates: 10/04/91 through 09/30/94
Open Data Set

 Mean = 1.67 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 76 
 Blind Sample ID = N41  Mean = 0.06 
 % Relative Standard Deviation = 22.7 
 Number of Observations = 68 
 Blind Sample ID = N40  Mean = 0.94 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 73 
 Blind Sample ID = N39  Mean = 0.12 
 % Relative Standard Deviation = 15.3 
 Number of Observations = 70 
 Blind Sample ID = N38  Mean = 1.18 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 74 
 Blind Sample ID = N37  Mean = 0.22 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 67 
 Blind Sample ID = N36  Mean = 0.91 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 99 
 Blind Sample ID = N35  Mean = 0.20 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 90 
 Blind Sample ID = N34  Mean = 0.85 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 34 
 Blind Sample ID = N33  Mean = 0.09 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 28 
 Blind Sample ID = N32  Mean = 1.65 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 4 
 Blind Sample ID = N31  Mean = 0.30 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 7 
 Blind Sample ID = N30
The SGPlot Procedure



- Phosphorus (as P), FIL, CFA, Kjeldahl -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: KJ005
Dates: 10/11/94 through 09/27/96
Open Data Set

 Mean = 0.78 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 55 
 Blind Sample ID = N48  Mean = 1.25 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 74 
 Blind Sample ID = N46  Mean = 0.12 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 9 
 Blind Sample ID = N45  Mean = 0.90 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 50 
 Blind Sample ID = N44  Mean = 0.12 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 82 
 Blind Sample ID = N43  Mean = 1.11 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 10 
 Blind Sample ID = N42
The SGPlot Procedure



- Phosphorus (as P), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: CL059
Dates: 04/10/85 through 09/28/94
Open Data Set

 Mean = 0.00 
 % Relative Standard Deviation = 73.8 
 Number of Observations = 21 
 Blind Sample ID = P8  Mean = 0.01 
 % Relative Standard Deviation = 143.7 
 Number of Observations = 5 
 Blind Sample ID = P5  Mean = 0.00 
 % Relative Standard Deviation = 82.2 
 Number of Observations = 6 
 Blind Sample ID = P3  Mean = 0.08 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 15 
 Blind Sample ID = P15  Mean = 0.02 
 % Relative Standard Deviation = 198.8 
 Number of Observations = 6 
 Blind Sample ID = P14  Mean = 0.00 
 % Relative Standard Deviation = 181.6 
 Number of Observations = 26 
 Blind Sample ID = P13  Mean = 0.00 
 % Relative Standard Deviation = 116.0 
 Number of Observations = 15 
 Blind Sample ID = P12  Mean = 0.01 
 % Relative Standard Deviation = 77.2 
 Number of Observations = 17 
 Blind Sample ID = P11  Mean = 0.06 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 36 
 Blind Sample ID = N40  Mean = 0.13 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 33 
 Blind Sample ID = N38  Mean = 0.22 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 24 
 Blind Sample ID = N36  Mean = 0.21 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 29 
 Blind Sample ID = N34  Mean = 0.09 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 15 
 Blind Sample ID = N32  Mean = 0.26 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 4 
 Blind Sample ID = N30  Mean = 0.01 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 5 
 Blind Sample ID = 88 /200  Mean = 0.01 
 % Relative Standard Deviation = 87.5 
 Number of Observations = 8 
 Blind Sample ID =
The SGPlot Procedure



- Phosphorus (as P), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: CL060
Dates: 10/25/94 through 08/15/96
Open Data Set

 Mean = 0.22 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 5 
 Blind Sample ID = N47  Mean = 0.13 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 6 
 Blind Sample ID = N45  Mean = 0.13 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 6 
 Blind Sample ID = N43
The SGPlot Procedure



- Phosphorus (as P), FIL, EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: KJ004
Dates: 02/20/96 through 09/20/96
Open Data Set

 Mean = 0.77 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 10 
 Blind Sample ID = N48  Mean = 1.23 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 4 
 Blind Sample ID = N46
The SGPlot Procedure



- Phosphorus (as P), UNF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00665, MCode: CL084
Dates: 12/03/84 through 09/26/91
Open Data Set

 Mean = 1.53 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 20 
 Blind Sample ID = N9  Mean = 0.33 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 9 
 Blind Sample ID = N8  Mean = 1.01 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 24 
 Blind Sample ID = N7  Mean = 0.77 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 29 
 Blind Sample ID = N5  Mean = 2.61 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 40 
 Blind Sample ID = N4  Mean = 1.60 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 49 
 Blind Sample ID = N31  Mean = 0.27 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 51 
 Blind Sample ID = N30  Mean = 1.53 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 21 
 Blind Sample ID = N3  Mean = 0.54 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 57 
 Blind Sample ID = N29  Mean = 0.17 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 63 
 Blind Sample ID = N28  Mean = 1.14 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 45 
 Blind Sample ID = N27  Mean = 0.34 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 33 
 Blind Sample ID = N26  Mean = 1.43 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 30 
 Blind Sample ID = N24  Mean = 0.58 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 30 
 Blind Sample ID = N23  Mean = 0.49 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 37 
 Blind Sample ID = N21  Mean = 0.66 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 61 
 Blind Sample ID = N20  Mean = 0.09 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 26 
 Blind Sample ID = N18  Mean = 0.42 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 21 
 Blind Sample ID = N17  Mean = 2.30 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 40 
 Blind Sample ID = N16  Mean = 0.81 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 53 
 Blind Sample ID = N15  Mean = 0.69 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 33 
 Blind Sample ID = N14  Mean = 0.21 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 22 
 Blind Sample ID = N13  Mean = 0.80 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 38 
 Blind Sample ID = N12  Mean = 1.49 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 23 
 Blind Sample ID = N10  Mean = 4.58 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 9 
 Blind Sample ID = F9  Mean = 0.99 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 31 
 Blind Sample ID = F7  Mean = 2.55 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 31 
 Blind Sample ID = F4  Mean = 1.53 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 32 
 Blind Sample ID = F3  Mean = 1.39 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 18 
 Blind Sample ID = F2  Mean = 1.31 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 19 
 Blind Sample ID = F15  Mean = 0.70 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 14 
 Blind Sample ID = F14  Mean = 0.30 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 25 
 Blind Sample ID = F13  Mean = 0.71 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 16 
 Blind Sample ID = F10  Mean = 0.75 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 44 
 Blind Sample ID = C19  Mean = 0.39 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 21 
 Blind Sample ID = C18  Mean = 1.08 
 % Relative Standard Deviation = 68.7 
 Number of Observations = 163 
 Blind Sample ID =
The SGPlot Procedure



- Phosphorus (as P), UNF, ASF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00665, MCode: KJ010
Dates: 10/04/91 through 09/25/92
Open Data Set

 Mean = 0.95 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 35 
 Blind Sample ID = N35  Mean = 0.21 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 39 
 Blind Sample ID = N34  Mean = 0.87 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 45 
 Blind Sample ID = N33  Mean = 0.09 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 50 
 Blind Sample ID = N32  Mean = 1.67 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 9 
 Blind Sample ID = N31  Mean = 0.29 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 6 
 Blind Sample ID = N30  Mean = 0.18 
 % Relative Standard Deviation = 172.0 
 Number of Observations = 6 
 Blind Sample ID = 50115-50103
The SGPlot Procedure



- Phosphorus (as P), UNF, ASF, Kjeldahl -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00665, MCode: KJ009
Dates: 11/03/94 through 09/27/96
Open Data Set

 Mean = 0.21 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 56 
 Blind Sample ID = N47  Mean = 1.24 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 7 
 Blind Sample ID = N46  Mean = 0.13 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 73 
 Blind Sample ID = N45  Mean = 0.89 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 28 
 Blind Sample ID = N44  Mean = 0.12 
 % Relative Standard Deviation = 13.7 
 Number of Observations = 50 
 Blind Sample ID = N43
The SGPlot Procedure



- Phosphorus (as P), UNF, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00665, MCode: CL001
Dates: 10/08/91 through 10/15/92
Open Data Set

 Mean = 0.21 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 11 
 Blind Sample ID = N34  Mean = 0.10 
 % Relative Standard Deviation = 22.3 
 Number of Observations = 9 
 Blind Sample ID = N32
The SGPlot Procedure



- Phosphorus (as P), UNF, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00665, MCode: CL090
Dates: 11/03/94 through 08/02/95
Open Data Set

 Mean = 0.13 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 55 
 Blind Sample ID = N43
The SGPlot Procedure



- Phosphorus (as P), UNF, EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00665, MCode: KJ011
Dates: 02/20/96 through 09/20/96
Open Data Set

 Mean = 0.78 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 11 
 Blind Sample ID = N48  Mean = 1.25 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 4 
 Blind Sample ID = N46
The SGPlot Procedure