- Nitrate + nitrite as N, fltd, DA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: RED01
Dates: 10/18/18 through 10/30/24
Open Data Set

Mean = 6.12 % Relative Standard Deviation = 3.0 Number of Observations = 94 Blind Sample ID = NS30 Mean = 10.15 % Relative Standard Deviation = 3.4 Number of Observations = 64 Blind Sample ID = NS28 Mean = 0.85 % Relative Standard Deviation = 2.7 Number of Observations = 24 Blind Sample ID = N162 Mean = 0.35 % Relative Standard Deviation = 2.9 Number of Observations = 20 Blind Sample ID = N161 Mean = 1.19 % Relative Standard Deviation = 2.5 Number of Observations = 24 Blind Sample ID = N160 Mean = 0.23 % Relative Standard Deviation = 4.7 Number of Observations = 24 Blind Sample ID = N159 Mean = 1.49 % Relative Standard Deviation = 2.8 Number of Observations = 24 Blind Sample ID = N158 Mean = 0.30 % Relative Standard Deviation = 6.2 Number of Observations = 24 Blind Sample ID = N157 Mean = 4.46 % Relative Standard Deviation = 1.8 Number of Observations = 24 Blind Sample ID = N156 Mean = 0.44 % Relative Standard Deviation = 3.1 Number of Observations = 24 Blind Sample ID = N155 Mean = 0.38 % Relative Standard Deviation = 6.0 Number of Observations = 22 Blind Sample ID = N153 Mean = 2.16 % Relative Standard Deviation = 4.9 Number of Observations = 12 Blind Sample ID = N152 Mean = 0.33 % Relative Standard Deviation = 4.2 Number of Observations = 12 Blind Sample ID = N151 Mean = 1.14 % Relative Standard Deviation = 2.7 Number of Observations = 12 Blind Sample ID = N150 Mean = 0.39 % Relative Standard Deviation = 5.0 Number of Observations = 11 Blind Sample ID = N149 Mean = 1.05 % Relative Standard Deviation = 2.8 Number of Observations = 12 Blind Sample ID = N148 Mean = 0.23 % Relative Standard Deviation = 5.0 Number of Observations = 12 Blind Sample ID = N147 Mean = 0.41 % Relative Standard Deviation = 2.3 Number of Observations = 12 Blind Sample ID = N146 Mean = 0.10 % Relative Standard Deviation = 8.8 Number of Observations = 11 Blind Sample ID = N145 Mean = 0.55 % Relative Standard Deviation = 2.0 Number of Observations = 12 Blind Sample ID = N144 Mean = 0.18 % Relative Standard Deviation = 5.1 Number of Observations = 12 Blind Sample ID = N143 Mean = 0.46 % Relative Standard Deviation = 2.3 Number of Observations = 12 Blind Sample ID = N142 Mean = 0.14 % Relative Standard Deviation = 6.4 Number of Observations = 12 Blind Sample ID = N141 Mean = 0.66 % Relative Standard Deviation = 4.3 Number of Observations = 8 Blind Sample ID = N140 Mean = 0.19 % Relative Standard Deviation = 6.9 Number of Observations = 7 Blind Sample ID = N139 Mean = 0.88 % Relative Standard Deviation = 69.8 Number of Observations = 25 Blind Sample ID =
The SGPlot Procedure


- Nitrate + nitrite as N, fltd, DA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: RED03
Dates: 10/25/23 through 10/02/24
Open Data Set

Mean = 0.78 % Relative Standard Deviation = 3.5 Number of Observations = 6 Blind Sample ID = N162 Mean = 0.36 % Relative Standard Deviation = 2.1 Number of Observations = 6 Blind Sample ID = N161 Mean = 1.18 % Relative Standard Deviation = 1.9 Number of Observations = 6 Blind Sample ID = N160 Mean = 0.24 % Relative Standard Deviation = 1.8 Number of Observations = 6 Blind Sample ID = N159
The SGPlot Procedure


- Nitrate + nitrite as N, fltd, DA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: RED02
Dates: 10/17/18 through 10/29/24
Open Data Set

Mean = 0.18 % Relative Standard Deviation = 1.9 Number of Observations = 3 Blind Sample ID = N163 Mean = 0.09 % Relative Standard Deviation = 2.2 Number of Observations = 17 Blind Sample ID = N162X Mean = 0.36 % Relative Standard Deviation = 1.3 Number of Observations = 15 Blind Sample ID = N161 Mean = 0.12 % Relative Standard Deviation = 2.7 Number of Observations = 15 Blind Sample ID = N160X Mean = 0.23 % Relative Standard Deviation = 2.5 Number of Observations = 15 Blind Sample ID = N159 Mean = 0.15 % Relative Standard Deviation = 5.5 Number of Observations = 17 Blind Sample ID = N158X Mean = 0.30 % Relative Standard Deviation = 4.4 Number of Observations = 18 Blind Sample ID = N157 Mean = 0.46 % Relative Standard Deviation = 3.3 Number of Observations = 15 Blind Sample ID = N156X Mean = 0.46 % Relative Standard Deviation = 3.0 Number of Observations = 15 Blind Sample ID = N155 Mean = 0.39 % Relative Standard Deviation = 3.1 Number of Observations = 18 Blind Sample ID = N153 Mean = 0.22 % Relative Standard Deviation = 3.3 Number of Observations = 13 Blind Sample ID = N152X Mean = 0.33 % Relative Standard Deviation = 3.0 Number of Observations = 14 Blind Sample ID = N151 Mean = 0.11 % Relative Standard Deviation = 3.6 Number of Observations = 18 Blind Sample ID = N150X Mean = 0.39 % Relative Standard Deviation = 3.4 Number of Observations = 17 Blind Sample ID = N149 Mean = 0.11 % Relative Standard Deviation = 2.7 Number of Observations = 15 Blind Sample ID = N148X Mean = 0.23 % Relative Standard Deviation = 1.6 Number of Observations = 14 Blind Sample ID = N147 Mean = 0.04 % Relative Standard Deviation = 5.4 Number of Observations = 17 Blind Sample ID = N146X Mean = 0.09 % Relative Standard Deviation = 2.6 Number of Observations = 18 Blind Sample ID = N145 Mean = 0.06 % Relative Standard Deviation = 6.7 Number of Observations = 15 Blind Sample ID = N144X Mean = 0.18 % Relative Standard Deviation = 3.0 Number of Observations = 15 Blind Sample ID = N143 Mean = 0.05 % Relative Standard Deviation = 5.9 Number of Observations = 18 Blind Sample ID = N142X Mean = 0.14 % Relative Standard Deviation = 5.2 Number of Observations = 18 Blind Sample ID = N141 Mean = 0.07 % Relative Standard Deviation = 4.1 Number of Observations = 10 Blind Sample ID = N140X Mean = 0.19 % Relative Standard Deviation = 2.2 Number of Observations = 11 Blind Sample ID = N139
The SGPlot Procedure


- Orthophosphate as P, fltd, DA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00671, MCode: PHM01
Dates: 10/12/18 through 10/30/24
Open Data Set

Mean = 0.47 % Relative Standard Deviation = 4.1 Number of Observations = 95 Blind Sample ID = NS30 Mean = 2.13 % Relative Standard Deviation = 5.3 Number of Observations = 64 Blind Sample ID = NS28 Mean = 0.24 % Relative Standard Deviation = 3.7 Number of Observations = 24 Blind Sample ID = N162 Mean = 0.13 % Relative Standard Deviation = 3.7 Number of Observations = 20 Blind Sample ID = N161 Mean = 0.12 % Relative Standard Deviation = 2.3 Number of Observations = 24 Blind Sample ID = N159 Mean = 0.28 % Relative Standard Deviation = 3.0 Number of Observations = 24 Blind Sample ID = N158 Mean = 0.11 % Relative Standard Deviation = 2.7 Number of Observations = 24 Blind Sample ID = N157 Mean = 0.65 % Relative Standard Deviation = 3.1 Number of Observations = 24 Blind Sample ID = N156 Mean = 0.13 % Relative Standard Deviation = 3.4 Number of Observations = 24 Blind Sample ID = N155 Mean = 0.28 % Relative Standard Deviation = 3.2 Number of Observations = 22 Blind Sample ID = N154 Mean = 0.09 % Relative Standard Deviation = 3.8 Number of Observations = 22 Blind Sample ID = N153 Mean = 0.32 % Relative Standard Deviation = 2.4 Number of Observations = 12 Blind Sample ID = N152 Mean = 0.08 % Relative Standard Deviation = 4.0 Number of Observations = 12 Blind Sample ID = N151 Mean = 0.32 % Relative Standard Deviation = 4.8 Number of Observations = 12 Blind Sample ID = N150 Mean = 0.17 % Relative Standard Deviation = 2.9 Number of Observations = 12 Blind Sample ID = N149 Mean = 0.29 % Relative Standard Deviation = 7.1 Number of Observations = 12 Blind Sample ID = N148 Mean = 0.20 % Relative Standard Deviation = 3.4 Number of Observations = 12 Blind Sample ID = N147 Mean = 0.33 % Relative Standard Deviation = 5.4 Number of Observations = 12 Blind Sample ID = N146 Mean = 0.14 % Relative Standard Deviation = 4.2 Number of Observations = 10 Blind Sample ID = N145 Mean = 0.39 % Relative Standard Deviation = 9.0 Number of Observations = 12 Blind Sample ID = N144 Mean = 0.17 % Relative Standard Deviation = 5.1 Number of Observations = 12 Blind Sample ID = N143 Mean = 0.50 % Relative Standard Deviation = 7.0 Number of Observations = 12 Blind Sample ID = N142 Mean = 0.15 % Relative Standard Deviation = 6.0 Number of Observations = 12 Blind Sample ID = N141 Mean = 0.29 % Relative Standard Deviation = 4.1 Number of Observations = 8 Blind Sample ID = N140 Mean = 0.10 % Relative Standard Deviation = 5.0 Number of Observations = 8 Blind Sample ID = N139
The SGPlot Procedure


- Phosphorus as P, fltd, CFA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: CL063
Dates: 09/12/19 through 10/16/24
Open Data Set

Mean = 0.27 % Relative Standard Deviation = 0.8 Number of Observations = 6 Blind Sample ID = N162 Mean = 0.13 % Relative Standard Deviation = 6.5 Number of Observations = 6 Blind Sample ID = N161 Mean = 0.36 % Relative Standard Deviation = 1.0 Number of Observations = 4 Blind Sample ID = N160 Mean = 0.13 % Relative Standard Deviation = 1.4 Number of Observations = 3 Blind Sample ID = N159 Mean = 0.27 % Relative Standard Deviation = 3.1 Number of Observations = 5 Blind Sample ID = N158 Mean = 0.12 % Relative Standard Deviation = 4.3 Number of Observations = 4 Blind Sample ID = N157 Mean = 0.67 % Relative Standard Deviation = 1.7 Number of Observations = 5 Blind Sample ID = N156 Mean = 0.14 % Relative Standard Deviation = 2.1 Number of Observations = 6 Blind Sample ID = N155 Mean = 0.29 % Relative Standard Deviation = 4.6 Number of Observations = 6 Blind Sample ID = N154 Mean = 0.10 % Relative Standard Deviation = 3.6 Number of Observations = 6 Blind Sample ID = N153 Mean = 0.32 % Relative Standard Deviation = 2.4 Number of Observations = 6 Blind Sample ID = N152 Mean = 0.09 % Relative Standard Deviation = 2.7 Number of Observations = 6 Blind Sample ID = N151 Mean = 0.45 % Relative Standard Deviation = 2.2 Number of Observations = 6 Blind Sample ID = N150 Mean = 0.19 % Relative Standard Deviation = 3.4 Number of Observations = 6 Blind Sample ID = N149 Mean = 0.31 % Relative Standard Deviation = 4.9 Number of Observations = 6 Blind Sample ID = N148 Mean = 0.21 % Relative Standard Deviation = 6.3 Number of Observations = 6 Blind Sample ID = N147 Mean = 0.34 % Relative Standard Deviation = 4.2 Number of Observations = 6 Blind Sample ID = N146 Mean = 0.14 % Relative Standard Deviation = 3.1 Number of Observations = 6 Blind Sample ID = N145 Mean = 0.41 % Relative Standard Deviation = 2.5 Number of Observations = 6 Blind Sample ID = N144 Mean = 0.18 % Relative Standard Deviation = 1.7 Number of Observations = 6 Blind Sample ID = N143
The SGPlot Procedure


- Phosphorus as P, fltd, CFA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: KJ005
Dates: 10/15/18 through 10/24/24
Open Data Set

Mean = 1.96 % Relative Standard Deviation = 1.7 Number of Observations = 49 Blind Sample ID = NS31 Mean = 2.25 % Relative Standard Deviation = 4.2 Number of Observations = 49 Blind Sample ID = NS29 Mean = 0.26 % Relative Standard Deviation = 5.1 Number of Observations = 24 Blind Sample ID = N162 Mean = 0.12 % Relative Standard Deviation = 5.3 Number of Observations = 20 Blind Sample ID = N161 Mean = 0.37 % Relative Standard Deviation = 3.7 Number of Observations = 24 Blind Sample ID = N160 Mean = 0.12 % Relative Standard Deviation = 7.6 Number of Observations = 23 Blind Sample ID = N159 Mean = 0.27 % Relative Standard Deviation = 3.8 Number of Observations = 24 Blind Sample ID = N158 Mean = 0.12 % Relative Standard Deviation = 9.8 Number of Observations = 24 Blind Sample ID = N157 Mean = 0.65 % Relative Standard Deviation = 3.8 Number of Observations = 24 Blind Sample ID = N156 Mean = 0.13 % Relative Standard Deviation = 5.0 Number of Observations = 24 Blind Sample ID = N155 Mean = 0.28 % Relative Standard Deviation = 5.6 Number of Observations = 21 Blind Sample ID = N154 Mean = 0.09 % Relative Standard Deviation = 8.4 Number of Observations = 21 Blind Sample ID = N153 Mean = 0.31 % Relative Standard Deviation = 5.3 Number of Observations = 12 Blind Sample ID = N152 Mean = 0.08 % Relative Standard Deviation = 9.2 Number of Observations = 11 Blind Sample ID = N151 Mean = 0.43 % Relative Standard Deviation = 3.7 Number of Observations = 12 Blind Sample ID = N150 Mean = 0.17 % Relative Standard Deviation = 3.4 Number of Observations = 12 Blind Sample ID = N149 Mean = 0.28 % Relative Standard Deviation = 3.3 Number of Observations = 12 Blind Sample ID = N148 Mean = 0.18 % Relative Standard Deviation = 4.6 Number of Observations = 12 Blind Sample ID = N147 Mean = 0.32 % Relative Standard Deviation = 5.3 Number of Observations = 12 Blind Sample ID = N146 Mean = 0.12 % Relative Standard Deviation = 4.5 Number of Observations = 11 Blind Sample ID = N145 Mean = 0.39 % Relative Standard Deviation = 2.7 Number of Observations = 12 Blind Sample ID = N144 Mean = 0.17 % Relative Standard Deviation = 3.9 Number of Observations = 12 Blind Sample ID = N143 Mean = 0.62 % Relative Standard Deviation = 2.0 Number of Observations = 12 Blind Sample ID = N142 Mean = 0.16 % Relative Standard Deviation = 6.1 Number of Observations = 12 Blind Sample ID = N141 Mean = 0.29 % Relative Standard Deviation = 2.2 Number of Observations = 8 Blind Sample ID = N140 Mean = 0.12 % Relative Standard Deviation = 8.5 Number of Observations = 8 Blind Sample ID = N139
The SGPlot Procedure


- Phosphorus as P, fltd, CFA, LL, EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: CL020
Dates: 10/29/18 through 11/07/24
Open Data Set

Mean = 0.07 % Relative Standard Deviation = 0.9 Number of Observations = 3 Blind Sample ID = N163 Mean = 0.03 % Relative Standard Deviation = 4.3 Number of Observations = 18 Blind Sample ID = N162X Mean = 0.13 % Relative Standard Deviation = 2.0 Number of Observations = 15 Blind Sample ID = N161 Mean = 0.04 % Relative Standard Deviation = 3.5 Number of Observations = 10 Blind Sample ID = N160X Mean = 0.13 % Relative Standard Deviation = 1.8 Number of Observations = 8 Blind Sample ID = N159 Mean = 0.03 % Relative Standard Deviation = 5.0 Number of Observations = 18 Blind Sample ID = N158X Mean = 0.11 % Relative Standard Deviation = 2.5 Number of Observations = 17 Blind Sample ID = N157 Mean = 0.07 % Relative Standard Deviation = 3.0 Number of Observations = 15 Blind Sample ID = N156X Mean = 0.14 % Relative Standard Deviation = 1.8 Number of Observations = 14 Blind Sample ID = N155 Mean = 0.03 % Relative Standard Deviation = 4.0 Number of Observations = 18 Blind Sample ID = N154X Mean = 0.10 % Relative Standard Deviation = 1.9 Number of Observations = 18 Blind Sample ID = N153 Mean = 0.03 % Relative Standard Deviation = 4.3 Number of Observations = 13 Blind Sample ID = N152X Mean = 0.09 % Relative Standard Deviation = 2.9 Number of Observations = 15 Blind Sample ID = N151 Mean = 0.04 % Relative Standard Deviation = 3.7 Number of Observations = 18 Blind Sample ID = N150X Mean = 0.19 % Relative Standard Deviation = 1.9 Number of Observations = 18 Blind Sample ID = N149 Mean = 0.03 % Relative Standard Deviation = 3.6 Number of Observations = 15 Blind Sample ID = N148X Mean = 0.21 % Relative Standard Deviation = 2.0 Number of Observations = 15 Blind Sample ID = N147 Mean = 0.03 % Relative Standard Deviation = 3.9 Number of Observations = 16 Blind Sample ID = N146X Mean = 0.14 % Relative Standard Deviation = 2.5 Number of Observations = 18 Blind Sample ID = N145 Mean = 0.04 % Relative Standard Deviation = 2.4 Number of Observations = 15 Blind Sample ID = N144X Mean = 0.19 % Relative Standard Deviation = 2.5 Number of Observations = 15 Blind Sample ID = N143 Mean = 0.06 % Relative Standard Deviation = 2.0 Number of Observations = 18 Blind Sample ID = N142X Mean = 0.18 % Relative Standard Deviation = 1.8 Number of Observations = 18 Blind Sample ID = N141 Mean = 0.03 % Relative Standard Deviation = 3.0 Number of Observations = 10 Blind Sample ID = N140X Mean = 0.13 % Relative Standard Deviation = 1.8 Number of Observations = 11 Blind Sample ID = N139
The SGPlot Procedure


- Phosphorus as P, unfltd, CFA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00665, MCode: AKP01
Dates: 11/27/18 through 10/17/24
Open Data Set

Mean = 0.27 % Relative Standard Deviation = 4.9 Number of Observations = 6 Blind Sample ID = N162 Mean = 0.13 % Relative Standard Deviation = 3.7 Number of Observations = 6 Blind Sample ID = N161 Mean = 0.28 % Relative Standard Deviation = 4.6 Number of Observations = 6 Blind Sample ID = N158 Mean = 0.11 % Relative Standard Deviation = 2.4 Number of Observations = 5 Blind Sample ID = N157 Mean = 0.67 % Relative Standard Deviation = 3.3 Number of Observations = 6 Blind Sample ID = N156 Mean = 0.14 % Relative Standard Deviation = 4.1 Number of Observations = 6 Blind Sample ID = N155 Mean = 0.28 % Relative Standard Deviation = 3.9 Number of Observations = 6 Blind Sample ID = N154 Mean = 0.10 % Relative Standard Deviation = 6.2 Number of Observations = 6 Blind Sample ID = N153 Mean = 0.32 % Relative Standard Deviation = 1.2 Number of Observations = 6 Blind Sample ID = N152 Mean = 0.09 % Relative Standard Deviation = 3.0 Number of Observations = 6 Blind Sample ID = N151 Mean = 0.45 % Relative Standard Deviation = 1.7 Number of Observations = 6 Blind Sample ID = N150 Mean = 0.18 % Relative Standard Deviation = 4.4 Number of Observations = 6 Blind Sample ID = N149 Mean = 0.32 % Relative Standard Deviation = 5.2 Number of Observations = 6 Blind Sample ID = N148 Mean = 0.21 % Relative Standard Deviation = 5.0 Number of Observations = 6 Blind Sample ID = N147 Mean = 0.34 % Relative Standard Deviation = 2.5 Number of Observations = 6 Blind Sample ID = N146 Mean = 0.14 % Relative Standard Deviation = 3.2 Number of Observations = 6 Blind Sample ID = N145 Mean = 0.41 % Relative Standard Deviation = 2.0 Number of Observations = 6 Blind Sample ID = N144 Mean = 0.18 % Relative Standard Deviation = 1.9 Number of Observations = 6 Blind Sample ID = N143 Mean = 0.62 % Relative Standard Deviation = 4.1 Number of Observations = 6 Blind Sample ID = N142 Mean = 0.17 % Relative Standard Deviation = 2.6 Number of Observations = 6 Blind Sample ID = N141 Mean = 0.29 % Relative Standard Deviation = 4.1 Number of Observations = 4 Blind Sample ID = N140 Mean = 0.12 % Relative Standard Deviation = 2.9 Number of Observations = 4 Blind Sample ID = N139
The SGPlot Procedure


- Phosphorus as P, unfltd, CFA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00665, MCode: KJ009
Dates: 10/16/18 through 10/23/24
Open Data Set

Mean = 1.96 % Relative Standard Deviation = 1.7 Number of Observations = 50 Blind Sample ID = NS31 Mean = 2.23 % Relative Standard Deviation = 3.3 Number of Observations = 50 Blind Sample ID = NS29 Mean = 0.26 % Relative Standard Deviation = 5.5 Number of Observations = 23 Blind Sample ID = N162 Mean = 0.13 % Relative Standard Deviation = 6.9 Number of Observations = 20 Blind Sample ID = N161 Mean = 0.36 % Relative Standard Deviation = 4.4 Number of Observations = 19 Blind Sample ID = N160 Mean = 0.12 % Relative Standard Deviation = 10.3 Number of Observations = 21 Blind Sample ID = N159 Mean = 0.27 % Relative Standard Deviation = 5.0 Number of Observations = 24 Blind Sample ID = N158 Mean = 0.11 % Relative Standard Deviation = 7.7 Number of Observations = 24 Blind Sample ID = N157 Mean = 0.64 % Relative Standard Deviation = 4.5 Number of Observations = 24 Blind Sample ID = N156 Mean = 0.13 % Relative Standard Deviation = 8.0 Number of Observations = 24 Blind Sample ID = N155 Mean = 0.28 % Relative Standard Deviation = 6.0 Number of Observations = 22 Blind Sample ID = N154 Mean = 0.09 % Relative Standard Deviation = 9.6 Number of Observations = 22 Blind Sample ID = N153 Mean = 0.30 % Relative Standard Deviation = 3.7 Number of Observations = 12 Blind Sample ID = N152 Mean = 0.08 % Relative Standard Deviation = 13.9 Number of Observations = 12 Blind Sample ID = N151 Mean = 0.44 % Relative Standard Deviation = 2.3 Number of Observations = 12 Blind Sample ID = N150 Mean = 0.17 % Relative Standard Deviation = 6.9 Number of Observations = 12 Blind Sample ID = N149 Mean = 0.27 % Relative Standard Deviation = 2.7 Number of Observations = 12 Blind Sample ID = N148 Mean = 0.19 % Relative Standard Deviation = 4.1 Number of Observations = 12 Blind Sample ID = N147 Mean = 0.32 % Relative Standard Deviation = 2.8 Number of Observations = 12 Blind Sample ID = N146 Mean = 0.12 % Relative Standard Deviation = 5.8 Number of Observations = 11 Blind Sample ID = N145 Mean = 0.38 % Relative Standard Deviation = 3.8 Number of Observations = 12 Blind Sample ID = N144 Mean = 0.17 % Relative Standard Deviation = 6.9 Number of Observations = 12 Blind Sample ID = N143 Mean = 0.63 % Relative Standard Deviation = 1.8 Number of Observations = 12 Blind Sample ID = N142 Mean = 0.16 % Relative Standard Deviation = 7.3 Number of Observations = 12 Blind Sample ID = N141 Mean = 0.30 % Relative Standard Deviation = 3.1 Number of Observations = 8 Blind Sample ID = N140 Mean = 0.12 % Relative Standard Deviation = 5.1 Number of Observations = 8 Blind Sample ID = N139
The SGPlot Procedure


- Phosphorus as P, unfltd, CFA, LL, EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00665, MCode: CL021
Dates: 10/24/18 through 11/07/24
Open Data Set

Mean = 0.08 % Relative Standard Deviation = 1.7 Number of Observations = 3 Blind Sample ID = N163 Mean = 0.03 % Relative Standard Deviation = 3.9 Number of Observations = 17 Blind Sample ID = N162X Mean = 0.13 % Relative Standard Deviation = 1.5 Number of Observations = 15 Blind Sample ID = N161 Mean = 0.04 % Relative Standard Deviation = 6.0 Number of Observations = 8 Blind Sample ID = N160X Mean = 0.13 % Relative Standard Deviation = 2.6 Number of Observations = 7 Blind Sample ID = N159 Mean = 0.03 % Relative Standard Deviation = 5.3 Number of Observations = 18 Blind Sample ID = N158X Mean = 0.11 % Relative Standard Deviation = 2.5 Number of Observations = 18 Blind Sample ID = N157 Mean = 0.07 % Relative Standard Deviation = 3.8 Number of Observations = 15 Blind Sample ID = N156X Mean = 0.14 % Relative Standard Deviation = 1.7 Number of Observations = 15 Blind Sample ID = N155 Mean = 0.03 % Relative Standard Deviation = 3.6 Number of Observations = 17 Blind Sample ID = N154X Mean = 0.10 % Relative Standard Deviation = 1.5 Number of Observations = 18 Blind Sample ID = N153 Mean = 0.03 % Relative Standard Deviation = 2.6 Number of Observations = 13 Blind Sample ID = N152X Mean = 0.09 % Relative Standard Deviation = 3.2 Number of Observations = 15 Blind Sample ID = N151 Mean = 0.04 % Relative Standard Deviation = 4.4 Number of Observations = 18 Blind Sample ID = N150X Mean = 0.19 % Relative Standard Deviation = 2.5 Number of Observations = 18 Blind Sample ID = N149 Mean = 0.03 % Relative Standard Deviation = 5.2 Number of Observations = 15 Blind Sample ID = N148X Mean = 0.20 % Relative Standard Deviation = 2.3 Number of Observations = 15 Blind Sample ID = N147 Mean = 0.03 % Relative Standard Deviation = 2.9 Number of Observations = 17 Blind Sample ID = N146X Mean = 0.14 % Relative Standard Deviation = 1.8 Number of Observations = 18 Blind Sample ID = N145 Mean = 0.04 % Relative Standard Deviation = 2.6 Number of Observations = 15 Blind Sample ID = N144X Mean = 0.19 % Relative Standard Deviation = 1.9 Number of Observations = 15 Blind Sample ID = N143 Mean = 0.06 % Relative Standard Deviation = 3.9 Number of Observations = 18 Blind Sample ID = N142X Mean = 0.18 % Relative Standard Deviation = 1.5 Number of Observations = 18 Blind Sample ID = N141 Mean = 0.03 % Relative Standard Deviation = 2.8 Number of Observations = 11 Blind Sample ID = N140X Mean = 0.13 % Relative Standard Deviation = 1.5 Number of Observations = 11 Blind Sample ID = N139
The SGPlot Procedure


- Total ammonia + organic nitrogen as N, fltd, CFA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00623, MCode: KJ002
Dates: 10/15/18 through 10/24/24
Open Data Set

Mean = 4.47 % Relative Standard Deviation = 2.4 Number of Observations = 49 Blind Sample ID = NS31 Mean = 3.40 % Relative Standard Deviation = 9.1 Number of Observations = 49 Blind Sample ID = NS29 Mean = 2.67 % Relative Standard Deviation = 4.3 Number of Observations = 24 Blind Sample ID = N162 Mean = 0.13 % Relative Standard Deviation = 33.9 Number of Observations = 20 Blind Sample ID = N161 Mean = 0.50 % Relative Standard Deviation = 7.2 Number of Observations = 24 Blind Sample ID = N160 Mean = 0.09 % Relative Standard Deviation = 27.6 Number of Observations = 23 Blind Sample ID = N159 Mean = 0.23 % Relative Standard Deviation = 16.5 Number of Observations = 24 Blind Sample ID = N158 Mean = 0.08 % Relative Standard Deviation = 13.0 Number of Observations = 24 Blind Sample ID = N157 Mean = 0.38 % Relative Standard Deviation = 13.9 Number of Observations = 24 Blind Sample ID = N156 Mean = 0.10 % Relative Standard Deviation = 22.2 Number of Observations = 24 Blind Sample ID = N155 Mean = 0.10 % Relative Standard Deviation = 31.6 Number of Observations = 21 Blind Sample ID = N153 Mean = 0.31 % Relative Standard Deviation = 21.8 Number of Observations = 12 Blind Sample ID = N152 Mean = 0.08 % Relative Standard Deviation = 18.0 Number of Observations = 12 Blind Sample ID = N151 Mean = 0.41 % Relative Standard Deviation = 6.1 Number of Observations = 12 Blind Sample ID = N150 Mean = 0.18 % Relative Standard Deviation = 12.6 Number of Observations = 12 Blind Sample ID = N149 Mean = 0.31 % Relative Standard Deviation = 9.7 Number of Observations = 12 Blind Sample ID = N148 Mean = 0.13 % Relative Standard Deviation = 13.5 Number of Observations = 12 Blind Sample ID = N147 Mean = 0.36 % Relative Standard Deviation = 13.9 Number of Observations = 12 Blind Sample ID = N146 Mean = 0.11 % Relative Standard Deviation = 19.7 Number of Observations = 11 Blind Sample ID = N145 Mean = 0.36 % Relative Standard Deviation = 9.6 Number of Observations = 12 Blind Sample ID = N144 Mean = 0.17 % Relative Standard Deviation = 17.0 Number of Observations = 12 Blind Sample ID = N143 Mean = 0.58 % Relative Standard Deviation = 3.4 Number of Observations = 12 Blind Sample ID = N142 Mean = 0.15 % Relative Standard Deviation = 19.0 Number of Observations = 12 Blind Sample ID = N141 Mean = 0.48 % Relative Standard Deviation = 3.9 Number of Observations = 8 Blind Sample ID = N140 Mean = 0.12 % Relative Standard Deviation = 12.7 Number of Observations = 8 Blind Sample ID = N139
The SGPlot Procedure


- Total ammonia + organic nitrogen as N, unfltd, CFA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00625, MCode: KJ008
Dates: 10/16/18 through 10/23/24
Open Data Set

Mean = 4.50 % Relative Standard Deviation = 2.0 Number of Observations = 50 Blind Sample ID = NS31 Mean = 3.42 % Relative Standard Deviation = 9.3 Number of Observations = 50 Blind Sample ID = NS29 Mean = 2.68 % Relative Standard Deviation = 3.1 Number of Observations = 23 Blind Sample ID = N162 Mean = 0.14 % Relative Standard Deviation = 27.2 Number of Observations = 20 Blind Sample ID = N161 Mean = 0.49 % Relative Standard Deviation = 10.2 Number of Observations = 21 Blind Sample ID = N160 Mean = 0.10 % Relative Standard Deviation = 29.2 Number of Observations = 21 Blind Sample ID = N159 Mean = 0.22 % Relative Standard Deviation = 24.6 Number of Observations = 24 Blind Sample ID = N158 Mean = 0.08 % Relative Standard Deviation = 14.5 Number of Observations = 24 Blind Sample ID = N157 Mean = 0.41 % Relative Standard Deviation = 24.0 Number of Observations = 24 Blind Sample ID = N156 Mean = 0.11 % Relative Standard Deviation = 49.2 Number of Observations = 24 Blind Sample ID = N155 Mean = 0.08 % Relative Standard Deviation = 17.2 Number of Observations = 22 Blind Sample ID = N153 Mean = 0.34 % Relative Standard Deviation = 8.6 Number of Observations = 12 Blind Sample ID = N152 Mean = 0.10 % Relative Standard Deviation = 31.2 Number of Observations = 12 Blind Sample ID = N151 Mean = 0.42 % Relative Standard Deviation = 10.3 Number of Observations = 12 Blind Sample ID = N150 Mean = 0.19 % Relative Standard Deviation = 9.9 Number of Observations = 12 Blind Sample ID = N149 Mean = 0.30 % Relative Standard Deviation = 5.0 Number of Observations = 12 Blind Sample ID = N148 Mean = 0.13 % Relative Standard Deviation = 12.3 Number of Observations = 12 Blind Sample ID = N147 Mean = 0.34 % Relative Standard Deviation = 6.5 Number of Observations = 12 Blind Sample ID = N146 Mean = 0.11 % Relative Standard Deviation = 22.6 Number of Observations = 11 Blind Sample ID = N145 Mean = 0.36 % Relative Standard Deviation = 7.0 Number of Observations = 12 Blind Sample ID = N144 Mean = 0.16 % Relative Standard Deviation = 17.5 Number of Observations = 12 Blind Sample ID = N143 Mean = 0.59 % Relative Standard Deviation = 6.9 Number of Observations = 12 Blind Sample ID = N142 Mean = 0.16 % Relative Standard Deviation = 12.3 Number of Observations = 12 Blind Sample ID = N141 Mean = 0.48 % Relative Standard Deviation = 5.6 Number of Observations = 8 Blind Sample ID = N140 Mean = 0.12 % Relative Standard Deviation = 20.5 Number of Observations = 7 Blind Sample ID = N139
The SGPlot Procedure


- Total ammonia as N, fltd, DA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00608, MCode: SHC02
Dates: 10/12/18 through 10/30/24
Open Data Set

Mean = 2.85 % Relative Standard Deviation = 2.3 Number of Observations = 95 Blind Sample ID = NS30 Mean = 1.46 % Relative Standard Deviation = 3.2 Number of Observations = 64 Blind Sample ID = NS28 Mean = 0.63 % Relative Standard Deviation = 6.0 Number of Observations = 24 Blind Sample ID = N162 Mean = 0.13 % Relative Standard Deviation = 6.1 Number of Observations = 20 Blind Sample ID = N161 Mean = 0.09 % Relative Standard Deviation = 5.5 Number of Observations = 24 Blind Sample ID = N159 Mean = 0.18 % Relative Standard Deviation = 3.9 Number of Observations = 24 Blind Sample ID = N158 Mean = 0.07 % Relative Standard Deviation = 5.6 Number of Observations = 24 Blind Sample ID = N157 Mean = 0.13 % Relative Standard Deviation = 29.0 Number of Observations = 24 Blind Sample ID = N156 Mean = 0.09 % Relative Standard Deviation = 7.6 Number of Observations = 24 Blind Sample ID = N155 Mean = 0.07 % Relative Standard Deviation = 6.8 Number of Observations = 22 Blind Sample ID = N153 Mean = 0.22 % Relative Standard Deviation = 4.5 Number of Observations = 11 Blind Sample ID = N152 Mean = 0.07 % Relative Standard Deviation = 9.2 Number of Observations = 12 Blind Sample ID = N151 Mean = 0.28 % Relative Standard Deviation = 3.9 Number of Observations = 12 Blind Sample ID = N150 Mean = 0.15 % Relative Standard Deviation = 3.2 Number of Observations = 12 Blind Sample ID = N149 Mean = 0.22 % Relative Standard Deviation = 1.7 Number of Observations = 12 Blind Sample ID = N148 Mean = 0.13 % Relative Standard Deviation = 9.6 Number of Observations = 12 Blind Sample ID = N147 Mean = 0.32 % Relative Standard Deviation = 2.0 Number of Observations = 12 Blind Sample ID = N146 Mean = 0.10 % Relative Standard Deviation = 6.3 Number of Observations = 10 Blind Sample ID = N145 Mean = 0.30 % Relative Standard Deviation = 4.8 Number of Observations = 12 Blind Sample ID = N144 Mean = 0.16 % Relative Standard Deviation = 4.1 Number of Observations = 12 Blind Sample ID = N143 Mean = 0.47 % Relative Standard Deviation = 4.7 Number of Observations = 12 Blind Sample ID = N142 Mean = 0.14 % Relative Standard Deviation = 3.9 Number of Observations = 12 Blind Sample ID = N141 Mean = 0.41 % Relative Standard Deviation = 4.4 Number of Observations = 8 Blind Sample ID = N140 Mean = 0.08 % Relative Standard Deviation = 3.2 Number of Observations = 8 Blind Sample ID = N139
The SGPlot Procedure


- Total ammonia as N, unfltd, CFA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00610, MCode: CL017
Dates: 10/12/18 through 10/28/24
Open Data Set

Mean = 0.76 % Relative Standard Deviation = 1.1 Number of Observations = 5 Blind Sample ID = N162 Mean = 0.12 % Relative Standard Deviation = 7.9 Number of Observations = 6 Blind Sample ID = N161 Mean = 0.09 % Relative Standard Deviation = 7.0 Number of Observations = 6 Blind Sample ID = N159 Mean = 0.19 % Relative Standard Deviation = 4.5 Number of Observations = 6 Blind Sample ID = N158 Mean = 0.06 % Relative Standard Deviation = 10.1 Number of Observations = 6 Blind Sample ID = N157 Mean = 0.12 % Relative Standard Deviation = 41.8 Number of Observations = 6 Blind Sample ID = N156 Mean = 0.09 % Relative Standard Deviation = 5.1 Number of Observations = 6 Blind Sample ID = N155 Mean = 0.07 % Relative Standard Deviation = 11.1 Number of Observations = 6 Blind Sample ID = N153 Mean = 0.25 % Relative Standard Deviation = 8.3 Number of Observations = 6 Blind Sample ID = N152 Mean = 0.06 % Relative Standard Deviation = 15.8 Number of Observations = 6 Blind Sample ID = N151 Mean = 0.29 % Relative Standard Deviation = 3.1 Number of Observations = 6 Blind Sample ID = N150 Mean = 0.16 % Relative Standard Deviation = 7.0 Number of Observations = 5 Blind Sample ID = N149 Mean = 0.24 % Relative Standard Deviation = 2.4 Number of Observations = 6 Blind Sample ID = N148 Mean = 0.12 % Relative Standard Deviation = 3.8 Number of Observations = 6 Blind Sample ID = N147 Mean = 0.33 % Relative Standard Deviation = 2.5 Number of Observations = 6 Blind Sample ID = N146 Mean = 0.10 % Relative Standard Deviation = 4.9 Number of Observations = 6 Blind Sample ID = N145 Mean = 0.31 % Relative Standard Deviation = 2.4 Number of Observations = 6 Blind Sample ID = N144 Mean = 0.15 % Relative Standard Deviation = 5.2 Number of Observations = 5 Blind Sample ID = N143 Mean = 0.47 % Relative Standard Deviation = 1.6 Number of Observations = 6 Blind Sample ID = N142 Mean = 0.13 % Relative Standard Deviation = 3.6 Number of Observations = 6 Blind Sample ID = N141 Mean = 0.44 % Relative Standard Deviation = 7.8 Number of Observations = 4 Blind Sample ID = N140 Mean = 0.08 % Relative Standard Deviation = 8.5 Number of Observations = 4 Blind Sample ID = N139
The SGPlot Procedure


- Total nitrogen as N, fltd, CFA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 62854, MCode: CL063
Dates: 11/30/18 through 11/01/24
Open Data Set

Mean = 3.57 % Relative Standard Deviation = 2.9 Number of Observations = 24 Blind Sample ID = N162 Mean = 0.48 % Relative Standard Deviation = 4.7 Number of Observations = 22 Blind Sample ID = N161 Mean = 1.75 % Relative Standard Deviation = 2.5 Number of Observations = 14 Blind Sample ID = N160 Mean = 0.34 % Relative Standard Deviation = 3.6 Number of Observations = 11 Blind Sample ID = N159 Mean = 1.78 % Relative Standard Deviation = 4.4 Number of Observations = 19 Blind Sample ID = N158 Mean = 0.38 % Relative Standard Deviation = 8.5 Number of Observations = 18 Blind Sample ID = N157 Mean = 4.98 % Relative Standard Deviation = 4.4 Number of Observations = 23 Blind Sample ID = N156 Mean = 0.55 % Relative Standard Deviation = 3.4 Number of Observations = 24 Blind Sample ID = N155 Mean = 1.08 % Relative Standard Deviation = 4.7 Number of Observations = 22 Blind Sample ID = N154 Mean = 0.48 % Relative Standard Deviation = 4.7 Number of Observations = 24 Blind Sample ID = N153 Mean = 2.57 % Relative Standard Deviation = 2.0 Number of Observations = 18 Blind Sample ID = N152 Mean = 0.43 % Relative Standard Deviation = 3.2 Number of Observations = 18 Blind Sample ID = N151 Mean = 1.56 % Relative Standard Deviation = 1.9 Number of Observations = 18 Blind Sample ID = N150 Mean = 0.58 % Relative Standard Deviation = 4.9 Number of Observations = 18 Blind Sample ID = N149 Mean = 1.41 % Relative Standard Deviation = 2.3 Number of Observations = 18 Blind Sample ID = N148 Mean = 0.39 % Relative Standard Deviation = 4.1 Number of Observations = 18 Blind Sample ID = N147 Mean = 0.78 % Relative Standard Deviation = 4.4 Number of Observations = 18 Blind Sample ID = N146 Mean = 0.21 % Relative Standard Deviation = 8.0 Number of Observations = 17 Blind Sample ID = N145 Mean = 0.95 % Relative Standard Deviation = 2.2 Number of Observations = 18 Blind Sample ID = N144 Mean = 0.36 % Relative Standard Deviation = 5.3 Number of Observations = 18 Blind Sample ID = N143 Mean = 1.08 % Relative Standard Deviation = 3.4 Number of Observations = 18 Blind Sample ID = N142 Mean = 0.29 % Relative Standard Deviation = 6.2 Number of Observations = 18 Blind Sample ID = N141 Mean = 1.14 % Relative Standard Deviation = 3.3 Number of Observations = 12 Blind Sample ID = N140 Mean = 0.30 % Relative Standard Deviation = 4.7 Number of Observations = 11 Blind Sample ID = N139 Mean = 1.87 % Relative Standard Deviation = 65.8 Number of Observations = 14 Blind Sample ID =
The SGPlot Procedure


- Total nitrogen as N, unfltd, CFA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 62855, MCode: AKP01
Dates: 11/27/18 through 10/29/24
Open Data Set

Mean = 3.48 % Relative Standard Deviation = 2.9 Number of Observations = 24 Blind Sample ID = N162 Mean = 0.48 % Relative Standard Deviation = 5.0 Number of Observations = 22 Blind Sample ID = N161 Mean = 1.64 % Relative Standard Deviation = 2.9 Number of Observations = 9 Blind Sample ID = N160 Mean = 0.34 % Relative Standard Deviation = 3.2 Number of Observations = 7 Blind Sample ID = N159 Mean = 1.74 % Relative Standard Deviation = 2.9 Number of Observations = 23 Blind Sample ID = N158 Mean = 0.37 % Relative Standard Deviation = 3.6 Number of Observations = 20 Blind Sample ID = N157 Mean = 4.79 % Relative Standard Deviation = 2.5 Number of Observations = 24 Blind Sample ID = N156 Mean = 0.54 % Relative Standard Deviation = 9.9 Number of Observations = 24 Blind Sample ID = N155 Mean = 1.10 % Relative Standard Deviation = 5.3 Number of Observations = 22 Blind Sample ID = N154 Mean = 0.47 % Relative Standard Deviation = 7.9 Number of Observations = 24 Blind Sample ID = N153 Mean = 2.57 % Relative Standard Deviation = 1.3 Number of Observations = 18 Blind Sample ID = N152 Mean = 0.42 % Relative Standard Deviation = 2.3 Number of Observations = 18 Blind Sample ID = N151 Mean = 1.56 % Relative Standard Deviation = 2.2 Number of Observations = 18 Blind Sample ID = N150 Mean = 0.57 % Relative Standard Deviation = 2.9 Number of Observations = 18 Blind Sample ID = N149 Mean = 1.39 % Relative Standard Deviation = 2.4 Number of Observations = 18 Blind Sample ID = N148 Mean = 0.38 % Relative Standard Deviation = 4.0 Number of Observations = 18 Blind Sample ID = N147 Mean = 0.77 % Relative Standard Deviation = 3.1 Number of Observations = 18 Blind Sample ID = N146 Mean = 0.20 % Relative Standard Deviation = 6.5 Number of Observations = 17 Blind Sample ID = N145 Mean = 0.93 % Relative Standard Deviation = 3.8 Number of Observations = 18 Blind Sample ID = N144 Mean = 0.35 % Relative Standard Deviation = 3.6 Number of Observations = 18 Blind Sample ID = N143 Mean = 1.02 % Relative Standard Deviation = 3.7 Number of Observations = 18 Blind Sample ID = N142 Mean = 0.28 % Relative Standard Deviation = 8.2 Number of Observations = 18 Blind Sample ID = N141 Mean = 1.15 % Relative Standard Deviation = 2.6 Number of Observations = 12 Blind Sample ID = N140 Mean = 0.30 % Relative Standard Deviation = 9.9 Number of Observations = 11 Blind Sample ID = N139
The SGPlot Procedure