- Ammonia (NH3 as N), FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00608, MCode: CL037
Dates: 10/12/04 through 06/13/06
Open Data Set

 Mean = 1.39 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 7 
 Blind Sample ID = NS16  Mean = 0.41 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 45 
 Blind Sample ID = NS14  Mean = 0.74 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 19 
 Blind Sample ID = NS12  Mean = 0.42 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 8 
 Blind Sample ID = N90  Mean = 0.26 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 8 
 Blind Sample ID = N89  Mean = 1.19 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 16 
 Blind Sample ID = N88  Mean = 0.26 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 24 
 Blind Sample ID = N87  Mean = 0.15 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 23 
 Blind Sample ID = N85  Mean = 1.00 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 23 
 Blind Sample ID = N84  Mean = 0.21 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 20 
 Blind Sample ID = N83
The SGPlot Procedure



- Ammonia (NH3 as N), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00608, MCode: CL039
Dates: 10/06/04 through 06/02/06
Open Data Set

 Mean = 0.04 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 12 
 Blind Sample ID = N90X  Mean = 0.28 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 12 
 Blind Sample ID = N89  Mean = 0.12 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = N88X  Mean = 0.26 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 36 
 Blind Sample ID = N87  Mean = 0.15 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 46 
 Blind Sample ID = N85  Mean = 0.10 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 21 
 Blind Sample ID = N84X  Mean = 0.22 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 40 
 Blind Sample ID = N83
The SGPlot Procedure



- Ammonia (NH3 as N), FIL, DA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00608, MCode: SHC02
Dates: 06/13/06 through 08/25/22
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 = 2.9 
 Number of Observations = 89 
 Blind Sample ID = NS28  Mean = 1.30 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 88 
 Blind Sample ID = NS26  Mean = 2.82 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 94 
 Blind Sample ID = NS24  Mean = 0.47 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 75 
 Blind Sample ID = NS22  Mean = 0.34 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 95 
 Blind Sample ID = NS20  Mean = 1.12 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 91 
 Blind Sample ID = NS18  Mean = 0.70 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 4 
 Blind Sample ID = NS16X2  Mean = 1.40 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 70 
 Blind Sample ID = NS16  Mean = 0.09 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 22 
 Blind Sample ID = N99  Mean = 0.61 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 23 
 Blind Sample ID = N98  Mean = 0.24 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = N97  Mean = 0.65 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 22 
 Blind Sample ID = N96  Mean = 0.18 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 19 
 Blind Sample ID = N95  Mean = 0.66 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 23 
 Blind Sample ID = N94  Mean = 0.97 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 11 
 Blind Sample ID = N92  Mean = 0.07 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 23 
 Blind Sample ID = N91  Mean = 0.04 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 24 
 Blind Sample ID = N90X  Mean = 0.44 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 16 
 Blind Sample ID = N90  Mean = 0.27 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 40 
 Blind Sample ID = N89  Mean = 0.11 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 6 
 Blind Sample ID = N154  Mean = 0.07 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 8 
 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 = 4.1 
 Number of Observations = 9 
 Blind Sample ID = N140  Mean = 0.08 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = N139  Mean = 0.43 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 12 
 Blind Sample ID = N138  Mean = 0.12 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 12 
 Blind Sample ID = N137  Mean = 0.35 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 5 
 Blind Sample ID = N136  Mean = 0.16 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 12 
 Blind Sample ID = N135  Mean = 0.11 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 12 
 Blind Sample ID = N134  Mean = 0.09 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 12 
 Blind Sample ID = N133  Mean = 0.27 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 11 
 Blind Sample ID = N132  Mean = 0.10 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 12 
 Blind Sample ID = N131  Mean = 0.46 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 12 
 Blind Sample ID = N130  Mean = 0.18 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 12 
 Blind Sample ID = N129  Mean = 0.45 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 12 
 Blind Sample ID = N128  Mean = 0.11 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 11 
 Blind Sample ID = N127  Mean = 0.33 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 12 
 Blind Sample ID = N126  Mean = 0.13 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 12 
 Blind Sample ID = N125  Mean = 0.16 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 12 
 Blind Sample ID = N124  Mean = 0.28 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 12 
 Blind Sample ID = N123  Mean = 0.09 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 12 
 Blind Sample ID = N121  Mean = 0.49 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 10 
 Blind Sample ID = N120  Mean = 0.23 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 11 
 Blind Sample ID = N119  Mean = 0.79 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 12 
 Blind Sample ID = N118  Mean = 0.39 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 12 
 Blind Sample ID = N117  Mean = 0.39 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = N116  Mean = 0.23 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 24 
 Blind Sample ID = N115  Mean = 0.91 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 24 
 Blind Sample ID = N114  Mean = 0.21 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 24 
 Blind Sample ID = N113  Mean = 0.81 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = N112  Mean = 0.28 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 24 
 Blind Sample ID = N111  Mean = 0.69 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 18 
 Blind Sample ID = N110  Mean = 0.19 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 24 
 Blind Sample ID = N109  Mean = 0.48 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = N108  Mean = 0.20 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 24 
 Blind Sample ID = N107  Mean = 1.08 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 24 
 Blind Sample ID = N106  Mean = 0.27 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 24 
 Blind Sample ID = N105  Mean = 0.71 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 23 
 Blind Sample ID = N104  Mean = 0.32 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 24 
 Blind Sample ID = N103  Mean = 0.78 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 12 
 Blind Sample ID = N102  Mean = 0.36 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = N101  Mean = 0.77 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 22 
 Blind Sample ID = N100
The SGPlot Procedure



- Ammonia (NH3 as N), UNF, CFA, Acidified -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00610, MCode: CL017
Dates: 10/08/04 through 08/25/22
Open Data Set

 Mean = 0.09 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 9 
 Blind Sample ID = N99  Mean = 0.65 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 12 
 Blind Sample ID = N98  Mean = 0.23 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 9 
 Blind Sample ID = N97  Mean = 0.68 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 11 
 Blind Sample ID = N96  Mean = 0.13 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 4 
 Blind Sample ID = N95c  Mean = 0.18 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 8 
 Blind Sample ID = N95  Mean = 0.69 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 12 
 Blind Sample ID = N94  Mean = 1.01 
 % Relative Standard Deviation = 0.6 
 Number of Observations = 7 
 Blind Sample ID = N92  Mean = 0.08 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 11 
 Blind Sample ID = N91  Mean = 0.45 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 12 
 Blind Sample ID = N90  Mean = 0.27 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 12 
 Blind Sample ID = N89  Mean = 1.23 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 8 
 Blind Sample ID = N88  Mean = 0.27 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 12 
 Blind Sample ID = N87  Mean = 0.16 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = N85  Mean = 1.01 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 9 
 Blind Sample ID = N84  Mean = 0.23 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 7 
 Blind Sample ID = N83  Mean = 0.14 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 4 
 Blind Sample ID = N154  Mean = 0.07 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 4 
 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  Mean = 0.44 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 6 
 Blind Sample ID = N138  Mean = 0.12 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 5 
 Blind Sample ID = N137  Mean = 0.16 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 5 
 Blind Sample ID = N135  Mean = 0.12 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 6 
 Blind Sample ID = N134  Mean = 0.09 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 6 
 Blind Sample ID = N133  Mean = 0.28 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 6 
 Blind Sample ID = N132  Mean = 0.11 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 6 
 Blind Sample ID = N131  Mean = 0.48 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 6 
 Blind Sample ID = N130  Mean = 0.19 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 6 
 Blind Sample ID = N129  Mean = 0.46 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 6 
 Blind Sample ID = N128  Mean = 0.11 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 6 
 Blind Sample ID = N127  Mean = 0.36 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 6 
 Blind Sample ID = N126  Mean = 0.14 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 6 
 Blind Sample ID = N125  Mean = 0.18 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 6 
 Blind Sample ID = N124  Mean = 0.29 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 6 
 Blind Sample ID = N123  Mean = 0.10 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 6 
 Blind Sample ID = N121  Mean = 0.51 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 5 
 Blind Sample ID = N120  Mean = 0.24 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 6 
 Blind Sample ID = N119  Mean = 0.83 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 6 
 Blind Sample ID = N118  Mean = 0.40 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 6 
 Blind Sample ID = N117  Mean = 0.41 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 12 
 Blind Sample ID = N116  Mean = 0.24 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 12 
 Blind Sample ID = N115  Mean = 0.98 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 12 
 Blind Sample ID = N114  Mean = 0.21 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 11 
 Blind Sample ID = N113  Mean = 0.89 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 11 
 Blind Sample ID = N112  Mean = 0.29 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 12 
 Blind Sample ID = N111  Mean = 0.73 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 11 
 Blind Sample ID = N110  Mean = 0.20 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 12 
 Blind Sample ID = N109  Mean = 0.48 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 12 
 Blind Sample ID = N108  Mean = 0.20 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 12 
 Blind Sample ID = N107  Mean = 1.09 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 12 
 Blind Sample ID = N106  Mean = 0.27 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 12 
 Blind Sample ID = N105  Mean = 0.73 
 % Relative Standard Deviation = 1.0 
 Number of Observations = 12 
 Blind Sample ID = N104  Mean = 0.33 
 % Relative Standard Deviation = 1.0 
 Number of Observations = 12 
 Blind Sample ID = N103  Mean = 0.82 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = N102  Mean = 0.37 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 12 
 Blind Sample ID = N101  Mean = 0.79 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 11 
 Blind Sample ID = N100
The SGPlot Procedure



- Kjeldahl Nitrogen (NH3+org N as N), FIL, CFA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00623, MCode: KJ002
Dates: 10/13/04 through 09/07/22
Open Data Set

 Mean = 4.47 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 49 
 Blind Sample ID = NS31  Mean = 3.39 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 74 
 Blind Sample ID = NS29  Mean = 3.76 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 72 
 Blind Sample ID = NS27  Mean = 3.58 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 84 
 Blind Sample ID = NS25  Mean = 0.68 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 66 
 Blind Sample ID = NS23  Mean = 1.49 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 84 
 Blind Sample ID = NS21  Mean = 2.22 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 92 
 Blind Sample ID = NS19  Mean = 0.90 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 4 
 Blind Sample ID = NS17X2  Mean = 1.79 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 71 
 Blind Sample ID = NS17  Mean = 0.87 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 51 
 Blind Sample ID = NS15  Mean = 2.89 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 20 
 Blind Sample ID = NS13  Mean = 0.19 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 22 
 Blind Sample ID = N99  Mean = 0.63 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 24 
 Blind Sample ID = N98  Mean = 0.37 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 23 
 Blind Sample ID = N97  Mean = 0.70 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 22 
 Blind Sample ID = N96  Mean = 0.18 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 19 
 Blind Sample ID = N95  Mean = 0.71 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 23 
 Blind Sample ID = N94  Mean = 0.16 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 24 
 Blind Sample ID = N93  Mean = 1.04 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 11 
 Blind Sample ID = N92  Mean = 0.08 
 % Relative Standard Deviation = 39.5 
 Number of Observations = 19 
 Blind Sample ID = N91  Mean = 0.52 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 24 
 Blind Sample ID = N90  Mean = 0.28 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 23 
 Blind Sample ID = N89  Mean = 1.29 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 16 
 Blind Sample ID = N88  Mean = 0.28 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 24 
 Blind Sample ID = N87  Mean = 1.00 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 23 
 Blind Sample ID = N86  Mean = 0.18 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 23 
 Blind Sample ID = N85  Mean = 1.07 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 23 
 Blind Sample ID = N84  Mean = 0.23 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 20 
 Blind Sample ID = N83  Mean = 0.10 
 % Relative Standard Deviation = 26.3 
 Number of Observations = 8 
 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 = 3.7 
 Number of Observations = 9 
 Blind Sample ID = N140  Mean = 0.12 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 8 
 Blind Sample ID = N139  Mean = 0.46 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 12 
 Blind Sample ID = N138  Mean = 0.12 
 % Relative Standard Deviation = 19.8 
 Number of Observations = 12 
 Blind Sample ID = N137  Mean = 0.41 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 5 
 Blind Sample ID = N136  Mean = 0.17 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 12 
 Blind Sample ID = N135  Mean = 0.18 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 12 
 Blind Sample ID = N134  Mean = 0.12 
 % Relative Standard Deviation = 17.9 
 Number of Observations = 12 
 Blind Sample ID = N133  Mean = 0.29 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 11 
 Blind Sample ID = N132  Mean = 0.13 
 % Relative Standard Deviation = 19.5 
 Number of Observations = 12 
 Blind Sample ID = N131  Mean = 0.53 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 12 
 Blind Sample ID = N130  Mean = 0.19 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 12 
 Blind Sample ID = N129  Mean = 0.50 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 12 
 Blind Sample ID = N128  Mean = 0.14 
 % Relative Standard Deviation = 22.6 
 Number of Observations = 12 
 Blind Sample ID = N127  Mean = 0.39 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 12 
 Blind Sample ID = N126  Mean = 0.16 
 % Relative Standard Deviation = 18.4 
 Number of Observations = 12 
 Blind Sample ID = N125  Mean = 0.18 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 12 
 Blind Sample ID = N124  Mean = 0.30 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 12 
 Blind Sample ID = N123  Mean = 0.60 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 10 
 Blind Sample ID = N122  Mean = 0.17 
 % Relative Standard Deviation = 33.8 
 Number of Observations = 12 
 Blind Sample ID = N121  Mean = 0.54 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 10 
 Blind Sample ID = N120  Mean = 0.29 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 11 
 Blind Sample ID = N119  Mean = 0.96 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 12 
 Blind Sample ID = N118  Mean = 0.42 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 12 
 Blind Sample ID = N117  Mean = 0.44 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 24 
 Blind Sample ID = N116  Mean = 0.24 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 24 
 Blind Sample ID = N115  Mean = 1.11 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 24 
 Blind Sample ID = N114  Mean = 0.24 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 24 
 Blind Sample ID = N113  Mean = 0.86 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 24 
 Blind Sample ID = N112  Mean = 0.29 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 24 
 Blind Sample ID = N111  Mean = 0.76 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 18 
 Blind Sample ID = N110  Mean = 0.25 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 24 
 Blind Sample ID = N109  Mean = 0.52 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 24 
 Blind Sample ID = N108  Mean = 0.25 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 24 
 Blind Sample ID = N107  Mean = 1.18 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 24 
 Blind Sample ID = N106  Mean = 0.30 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 24 
 Blind Sample ID = N105  Mean = 0.76 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 24 
 Blind Sample ID = N104  Mean = 0.33 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 24 
 Blind Sample ID = N103  Mean = 0.95 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 12 
 Blind Sample ID = N102  Mean = 0.40 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 24 
 Blind Sample ID = N101  Mean = 0.78 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 22 
 Blind Sample ID = N100
The SGPlot Procedure



- Kjeldahl Nitrogen (NH3+org N as N), FIL, CFA, ACD -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00623, MCode: KJ003
Dates: 10/20/04 through 10/17/06
Open Data Set

 Mean = 0.54 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 12 
 Blind Sample ID = N90  Mean = 0.30 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 12 
 Blind Sample ID = N89  Mean = 1.32 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 4 
 Blind Sample ID = N88  Mean = 0.29 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 4 
 Blind Sample ID = N87  Mean = 0.98 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 11 
 Blind Sample ID = N86  Mean = 0.18 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 11 
 Blind Sample ID = N85  Mean = 1.08 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 10 
 Blind Sample ID = N84  Mean = 0.26 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 8 
 Blind Sample ID = N83
The SGPlot Procedure



- Kjeldahl Nitrogen (NH3+org N as N), UNF, CFA, ACD -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00625, MCode: KJ008
Dates: 10/12/04 through 09/26/22
Open Data Set

 Mean = 4.50 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 49 
 Blind Sample ID = NS31  Mean = 3.39 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 75 
 Blind Sample ID = NS29  Mean = 3.72 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 72 
 Blind Sample ID = NS27  Mean = 3.55 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 84 
 Blind Sample ID = NS25  Mean = 0.68 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 66 
 Blind Sample ID = NS23  Mean = 1.50 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 84 
 Blind Sample ID = NS21  Mean = 2.21 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 92 
 Blind Sample ID = NS19  Mean = 0.89 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 4 
 Blind Sample ID = NS17X2  Mean = 1.80 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 71 
 Blind Sample ID = NS17  Mean = 0.87 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 51 
 Blind Sample ID = NS15  Mean = 2.87 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 20 
 Blind Sample ID = NS13  Mean = 0.18 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 22 
 Blind Sample ID = N99  Mean = 0.67 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 24 
 Blind Sample ID = N98  Mean = 0.37 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 23 
 Blind Sample ID = N97  Mean = 0.70 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 22 
 Blind Sample ID = N96  Mean = 0.19 
 % Relative Standard Deviation = 27.1 
 Number of Observations = 19 
 Blind Sample ID = N95  Mean = 0.71 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 24 
 Blind Sample ID = N94  Mean = 0.16 
 % Relative Standard Deviation = 18.0 
 Number of Observations = 24 
 Blind Sample ID = N93  Mean = 1.06 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 12 
 Blind Sample ID = N92  Mean = 0.08 
 % Relative Standard Deviation = 34.3 
 Number of Observations = 22 
 Blind Sample ID = N91  Mean = 0.51 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 24 
 Blind Sample ID = N90  Mean = 0.30 
 % Relative Standard Deviation = 20.9 
 Number of Observations = 24 
 Blind Sample ID = N89  Mean = 1.32 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 16 
 Blind Sample ID = N88  Mean = 0.30 
 % Relative Standard Deviation = 15.8 
 Number of Observations = 24 
 Blind Sample ID = N87  Mean = 1.01 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 23 
 Blind Sample ID = N86  Mean = 0.18 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 23 
 Blind Sample ID = N85  Mean = 1.09 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 23 
 Blind Sample ID = N84  Mean = 0.23 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 20 
 Blind Sample ID = N83  Mean = 0.26 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 6 
 Blind Sample ID = N154  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 = 0.47 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 9 
 Blind Sample ID = N140  Mean = 0.12 
 % Relative Standard Deviation = 20.5 
 Number of Observations = 7 
 Blind Sample ID = N139  Mean = 0.48 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 11 
 Blind Sample ID = N138  Mean = 0.12 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 12 
 Blind Sample ID = N137  Mean = 0.40 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 5 
 Blind Sample ID = N136  Mean = 0.17 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 11 
 Blind Sample ID = N135  Mean = 0.17 
 % Relative Standard Deviation = 22.6 
 Number of Observations = 12 
 Blind Sample ID = N134  Mean = 0.12 
 % Relative Standard Deviation = 27.6 
 Number of Observations = 12 
 Blind Sample ID = N133  Mean = 0.30 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 11 
 Blind Sample ID = N132  Mean = 0.11 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 12 
 Blind Sample ID = N131  Mean = 0.53 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 11 
 Blind Sample ID = N130  Mean = 0.20 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 12 
 Blind Sample ID = N129  Mean = 0.50 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 12 
 Blind Sample ID = N128  Mean = 0.15 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 12 
 Blind Sample ID = N127  Mean = 0.38 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 12 
 Blind Sample ID = N126  Mean = 0.17 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 12 
 Blind Sample ID = N125  Mean = 0.20 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 12 
 Blind Sample ID = N124  Mean = 0.29 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 12 
 Blind Sample ID = N123  Mean = 0.59 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 12 
 Blind Sample ID = N122  Mean = 0.17 
 % Relative Standard Deviation = 18.4 
 Number of Observations = 12 
 Blind Sample ID = N121  Mean = 0.54 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 10 
 Blind Sample ID = N120  Mean = 0.26 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 11 
 Blind Sample ID = N119  Mean = 0.94 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 12 
 Blind Sample ID = N118  Mean = 0.42 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 12 
 Blind Sample ID = N117  Mean = 0.43 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 24 
 Blind Sample ID = N116  Mean = 0.24 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 24 
 Blind Sample ID = N115  Mean = 1.06 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 24 
 Blind Sample ID = N114  Mean = 0.25 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 24 
 Blind Sample ID = N113  Mean = 0.87 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 24 
 Blind Sample ID = N112  Mean = 0.30 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 24 
 Blind Sample ID = N111  Mean = 0.75 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 23 
 Blind Sample ID = N110  Mean = 0.25 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 24 
 Blind Sample ID = N109  Mean = 0.53 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 24 
 Blind Sample ID = N108  Mean = 0.24 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 24 
 Blind Sample ID = N107  Mean = 1.19 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 24 
 Blind Sample ID = N106  Mean = 0.30 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 24 
 Blind Sample ID = N105  Mean = 0.77 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 24 
 Blind Sample ID = N104  Mean = 0.33 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 24 
 Blind Sample ID = N103  Mean = 0.93 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 12 
 Blind Sample ID = N102  Mean = 0.40 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 24 
 Blind Sample ID = N101  Mean = 0.79 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 22 
 Blind Sample ID = N100
The SGPlot Procedure



- Nitrate plus Nitrite (NO3+NO2 as N), FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: CL048
Dates: 10/12/04 through 10/17/11
Open Data Set

 Mean = 0.29 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 73 
 Blind Sample ID = NS20  Mean = 0.40 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 93 
 Blind Sample ID = NS18  Mean = 0.36 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 4 
 Blind Sample ID = NS16X2  Mean = 0.74 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 77 
 Blind Sample ID = NS16  Mean = 0.23 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 45 
 Blind Sample ID = NS14  Mean = 0.38 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 19 
 Blind Sample ID = NS12  Mean = 0.24 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 22 
 Blind Sample ID = N99  Mean = 1.03 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = N98  Mean = 0.36 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 23 
 Blind Sample ID = N97  Mean = 1.15 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 22 
 Blind Sample ID = N96  Mean = 0.09 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 19 
 Blind Sample ID = N95  Mean = 0.94 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 23 
 Blind Sample ID = N94  Mean = 0.14 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 24 
 Blind Sample ID = N93  Mean = 1.46 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 12 
 Blind Sample ID = N92  Mean = 0.13 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 23 
 Blind Sample ID = N91  Mean = 0.76 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = N90  Mean = 0.27 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 24 
 Blind Sample ID = N89  Mean = 1.36 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 16 
 Blind Sample ID = N88  Mean = 0.19 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 24 
 Blind Sample ID = N87  Mean = 0.68 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 23 
 Blind Sample ID = N86  Mean = 0.17 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 23 
 Blind Sample ID = N85  Mean = 1.20 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 23 
 Blind Sample ID = N84  Mean = 0.06 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 20 
 Blind Sample ID = N83  Mean = 1.38 
 % Relative Standard Deviation = 0.3 
 Number of Observations = 3 
 Blind Sample ID = N112  Mean = 1.44 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 18 
 Blind Sample ID = N110  Mean = 0.19 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 24 
 Blind Sample ID = N109  Mean = 0.92 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 24 
 Blind Sample ID = N108  Mean = 0.14 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 24 
 Blind Sample ID = N107  Mean = 1.11 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 24 
 Blind Sample ID = N106  Mean = 0.17 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 24 
 Blind Sample ID = N105  Mean = 0.83 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 24 
 Blind Sample ID = N104  Mean = 0.27 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 24 
 Blind Sample ID = N103  Mean = 0.97 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 12 
 Blind Sample ID = N102  Mean = 0.36 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 24 
 Blind Sample ID = N101  Mean = 0.72 
 % Relative Standard Deviation = 0.8 
 Number of Observations = 22 
 Blind Sample ID = N100
The SGPlot Procedure



- Nitrate plus Nitrite (NO3+NO2 as N), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: CL050
Dates: 10/06/04 through 10/18/11
Open Data Set

 Mean = 0.24 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 32 
 Blind Sample ID = N99  Mean = 0.10 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 36 
 Blind Sample ID = N98X  Mean = 0.36 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 36 
 Blind Sample ID = N97  Mean = 0.11 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 26 
 Blind Sample ID = N96X  Mean = 0.09 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 31 
 Blind Sample ID = N95  Mean = 0.09 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 35 
 Blind Sample ID = N94X  Mean = 0.13 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 35 
 Blind Sample ID = N93  Mean = 0.14 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 15 
 Blind Sample ID = N92X  Mean = 0.13 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 34 
 Blind Sample ID = N91  Mean = 0.07 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 36 
 Blind Sample ID = N90X  Mean = 0.27 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 36 
 Blind Sample ID = N89  Mean = 0.13 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 24 
 Blind Sample ID = N88X  Mean = 0.19 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 36 
 Blind Sample ID = N87  Mean = 0.07 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 20 
 Blind Sample ID = N86X  Mean = 0.17 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 46 
 Blind Sample ID = N85  Mean = 0.12 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 21 
 Blind Sample ID = N84X  Mean = 0.06 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 40 
 Blind Sample ID = N83  Mean = 0.31 
 % Relative Standard Deviation = 0.8 
 Number of Observations = 3 
 Blind Sample ID = N111  Mean = 0.14 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 28 
 Blind Sample ID = N110X  Mean = 0.19 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 36 
 Blind Sample ID = N109  Mean = 0.09 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 36 
 Blind Sample ID = N108X  Mean = 0.14 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 35 
 Blind Sample ID = N107  Mean = 0.11 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 36 
 Blind Sample ID = N106X  Mean = 0.18 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 36 
 Blind Sample ID = N105  Mean = 0.08 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 36 
 Blind Sample ID = N104X  Mean = 0.28 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 36 
 Blind Sample ID = N103  Mean = 0.10 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 16 
 Blind Sample ID = N102X  Mean = 0.36 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 36 
 Blind Sample ID = N101  Mean = 0.07 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 29 
 Blind Sample ID = N100X
The SGPlot Procedure



- Nitrate plus Nitrite (NO3+NO2 as N), FIL, DA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: RED01
Dates: 09/30/11 through 07/11/22
Open Data Set

 Mean = 6.12 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 94 
 Blind Sample ID = NS30  Mean = 10.12 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 89 
 Blind Sample ID = NS28  Mean = 1.88 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 88 
 Blind Sample ID = NS26  Mean = 6.24 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 96 
 Blind Sample ID = NS24  Mean = 1.33 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 81 
 Blind Sample ID = NS22  Mean = 0.29 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 23 
 Blind Sample ID = NS20  Mean = 0.79 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 8 
 Blind Sample ID = N154  Mean = 0.36 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 8 
 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 = 0.67 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 9 
 Blind Sample ID = N140  Mean = 0.19 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 7 
 Blind Sample ID = N139  Mean = 0.78 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 12 
 Blind Sample ID = N138  Mean = 0.32 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 12 
 Blind Sample ID = N137  Mean = 0.64 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 5 
 Blind Sample ID = N136  Mean = 0.43 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 11 
 Blind Sample ID = N135  Mean = 0.79 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 12 
 Blind Sample ID = N134  Mean = 0.09 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 12 
 Blind Sample ID = N133  Mean = 0.93 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 11 
 Blind Sample ID = N132  Mean = 0.35 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 12 
 Blind Sample ID = N131  Mean = 1.78 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 12 
 Blind Sample ID = N130  Mean = 0.25 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 12 
 Blind Sample ID = N129  Mean = 3.04 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 12 
 Blind Sample ID = N128  Mean = 0.30 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 12 
 Blind Sample ID = N127  Mean = 1.43 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 12 
 Blind Sample ID = N126  Mean = 0.29 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 11 
 Blind Sample ID = N125  Mean = 0.53 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 12 
 Blind Sample ID = N124  Mean = 0.24 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 12 
 Blind Sample ID = N123  Mean = 1.10 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 10 
 Blind Sample ID = N122  Mean = 0.42 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 12 
 Blind Sample ID = N121  Mean = 0.68 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 10 
 Blind Sample ID = N120  Mean = 0.27 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 11 
 Blind Sample ID = N119  Mean = 0.58 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 12 
 Blind Sample ID = N118  Mean = 0.22 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 12 
 Blind Sample ID = N117  Mean = 0.43 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 24 
 Blind Sample ID = N116  Mean = 0.23 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 23 
 Blind Sample ID = N115  Mean = 1.12 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = N114  Mean = 0.11 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 24 
 Blind Sample ID = N113  Mean = 1.41 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 22 
 Blind Sample ID = N112  Mean = 0.31 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 23 
 Blind Sample ID = N111
The SGPlot Procedure



- Nitrate plus Nitrite (NO3+NO2 as N), FIL, DA, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: RED02
Dates: 10/20/11 through 09/16/22
Open Data Set

 Mean = 0.08 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 14 
 Blind Sample ID = N154X  Mean = 0.39 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 15 
 Blind Sample ID = N153  Mean = 0.22 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 12 
 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 = 4.5 
 Number of Observations = 11 
 Blind Sample ID = N140X  Mean = 0.19 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 12 
 Blind Sample ID = N139  Mean = 0.08 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 18 
 Blind Sample ID = N138X  Mean = 0.32 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 16 
 Blind Sample ID = N137  Mean = 0.06 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 6 
 Blind Sample ID = N136X  Mean = 0.43 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 15 
 Blind Sample ID = N135  Mean = 0.08 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 23 
 Blind Sample ID = N134X  Mean = 0.09 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 24 
 Blind Sample ID = N133  Mean = 0.09 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 21 
 Blind Sample ID = N132X  Mean = 0.36 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 21 
 Blind Sample ID = N131  Mean = 0.18 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 22 
 Blind Sample ID = N130X  Mean = 0.27 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 24 
 Blind Sample ID = N129  Mean = 0.30 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 24 
 Blind Sample ID = N128X  Mean = 0.31 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 23 
 Blind Sample ID = N127  Mean = 0.15 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 24 
 Blind Sample ID = N126X  Mean = 0.30 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 24 
 Blind Sample ID = N125  Mean = 0.06 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 23 
 Blind Sample ID = N124X  Mean = 0.25 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 24 
 Blind Sample ID = N123  Mean = 0.11 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 24 
 Blind Sample ID = N122X  Mean = 0.42 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 24 
 Blind Sample ID = N121  Mean = 0.07 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 21 
 Blind Sample ID = N120X  Mean = 0.27 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 21 
 Blind Sample ID = N119  Mean = 0.06 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 18 
 Blind Sample ID = N118X  Mean = 0.22 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 18 
 Blind Sample ID = N117  Mean = 0.04 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 35 
 Blind Sample ID = N116X  Mean = 0.22 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 35 
 Blind Sample ID = N115  Mean = 0.11 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 35 
 Blind Sample ID = N114X  Mean = 0.11 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 36 
 Blind Sample ID = N113  Mean = 0.14 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 34 
 Blind Sample ID = N112X  Mean = 0.31 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 33 
 Blind Sample ID = N111
The SGPlot Procedure



- Nitrate plus Nitrite (NO3+NO2 as N), FIL, EPA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00631, MCode: CL047
Dates: 10/22/04 through 10/12/06
Open Data Set

 Mean = 0.73 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 12 
 Blind Sample ID = N90  Mean = 0.27 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 12 
 Blind Sample ID = N89  Mean = 1.30 
 % Relative Standard Deviation = 0.0 
 Number of Observations = 3 
 Blind Sample ID = N88  Mean = 0.19 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 4 
 Blind Sample ID = N87  Mean = 0.68 
 % Relative Standard Deviation = 0.7 
 Number of Observations = 11 
 Blind Sample ID = N86  Mean = 0.17 
 % Relative Standard Deviation = 1.0 
 Number of Observations = 12 
 Blind Sample ID = N85  Mean = 1.22 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 10 
 Blind Sample ID = N84  Mean = 0.06 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 8 
 Blind Sample ID = N83
The SGPlot Procedure



- Orthophosphate (PO4 as P), FIL, COL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00671, MCode: CL053
Dates: 10/12/04 through 06/13/06
Open Data Set

 Mean = 0.86 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 7 
 Blind Sample ID = NS16  Mean = 0.17 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 45 
 Blind Sample ID = NS14  Mean = 0.35 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 19 
 Blind Sample ID = NS12  Mean = 0.45 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 8 
 Blind Sample ID = N90  Mean = 0.27 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 8 
 Blind Sample ID = N89  Mean = 1.16 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 24 
 Blind Sample ID = N88  Mean = 0.18 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 24 
 Blind Sample ID = N87  Mean = 0.16 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 23 
 Blind Sample ID = N85  Mean = 0.68 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 23 
 Blind Sample ID = N84  Mean = 0.15 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 20 
 Blind Sample ID = N83
The SGPlot Procedure



- Orthophosphate (PO4 as P), FIL, COL, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00671, MCode: CL057
Dates: 10/06/04 through 06/02/06
Open Data Set

 Mean = 0.04 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 12 
 Blind Sample ID = N90X  Mean = 0.27 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 12 
 Blind Sample ID = N89  Mean = 0.11 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 36 
 Blind Sample ID = N88X  Mean = 0.18 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 36 
 Blind Sample ID = N87  Mean = 0.16 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 46 
 Blind Sample ID = N85  Mean = 0.07 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 21 
 Blind Sample ID = N84X  Mean = 0.16 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 40 
 Blind Sample ID = N83
The SGPlot Procedure



- Orthophosphate (PO4 as P), FIL, DA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00671, MCode: PHM01
Dates: 06/02/06 through 07/13/22
Open Data Set

 Mean = 0.47 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 95 
 Blind Sample ID = NS30  Mean = 2.12 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 89 
 Blind Sample ID = NS28  Mean = 0.48 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 88 
 Blind Sample ID = NS26  Mean = 0.50 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 94 
 Blind Sample ID = NS24  Mean = 0.12 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 75 
 Blind Sample ID = NS22  Mean = 0.13 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 94 
 Blind Sample ID = NS20  Mean = 0.26 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 92 
 Blind Sample ID = NS18  Mean = 0.42 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 4 
 Blind Sample ID = NS16X2  Mean = 0.84 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 70 
 Blind Sample ID = NS16  Mean = 0.19 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 22 
 Blind Sample ID = N99  Mean = 0.59 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 24 
 Blind Sample ID = N98  Mean = 0.23 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = N97  Mean = 0.97 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 22 
 Blind Sample ID = N96  Mean = 0.22 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 19 
 Blind Sample ID = N95  Mean = 0.74 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 24 
 Blind Sample ID = N94  Mean = 1.49 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 23 
 Blind Sample ID = N92  Mean = 0.04 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 23 
 Blind Sample ID = N91  Mean = 0.05 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 24 
 Blind Sample ID = N90X  Mean = 0.46 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 16 
 Blind Sample ID = N90  Mean = 0.28 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 40 
 Blind Sample ID = N89  Mean = 0.28 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 8 
 Blind Sample ID = N154  Mean = 0.09 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 8 
 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 = 3.9 
 Number of Observations = 9 
 Blind Sample ID = N140  Mean = 0.10 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 8 
 Blind Sample ID = N139  Mean = 0.62 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 12 
 Blind Sample ID = N138  Mean = 0.13 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 12 
 Blind Sample ID = N137  Mean = 0.39 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 12 
 Blind Sample ID = N136  Mean = 0.16 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 12 
 Blind Sample ID = N135  Mean = 0.27 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 12 
 Blind Sample ID = N134  Mean = 0.09 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 12 
 Blind Sample ID = N133  Mean = 0.30 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 11 
 Blind Sample ID = N132  Mean = 0.04 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 12 
 Blind Sample ID = N131  Mean = 0.59 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 12 
 Blind Sample ID = N130  Mean = 0.21 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 12 
 Blind Sample ID = N129  Mean = 0.44 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 12 
 Blind Sample ID = N128  Mean = 0.11 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 11 
 Blind Sample ID = N127  Mean = 0.50 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 12 
 Blind Sample ID = N126  Mean = 0.22 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 12 
 Blind Sample ID = N125  Mean = 0.19 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 12 
 Blind Sample ID = N124  Mean = 0.27 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 12 
 Blind Sample ID = N123  Mean = 0.09 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 12 
 Blind Sample ID = N121  Mean = 0.68 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 10 
 Blind Sample ID = N120  Mean = 0.74 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 12 
 Blind Sample ID = N118  Mean = 0.36 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 12 
 Blind Sample ID = N117  Mean = 0.41 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 24 
 Blind Sample ID = N116  Mean = 0.24 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 24 
 Blind Sample ID = N115  Mean = 1.07 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = N114  Mean = 1.28 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = N112  Mean = 0.28 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 24 
 Blind Sample ID = N111  Mean = 0.58 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 24 
 Blind Sample ID = N110  Mean = 0.19 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 24 
 Blind Sample ID = N109  Mean = 0.55 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = N108  Mean = 1.24 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 24 
 Blind Sample ID = N106  Mean = 0.23 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 24 
 Blind Sample ID = N105  Mean = 0.71 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 23 
 Blind Sample ID = N104  Mean = 0.29 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 24 
 Blind Sample ID = N103  Mean = 1.26 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 24 
 Blind Sample ID = N102  Mean = 0.34 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 24 
 Blind Sample ID = N101  Mean = 0.65 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 22 
 Blind Sample ID = N100
The SGPlot Procedure



- Phosphorus (as P), FIL, ASF, Kjeldahl -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: KJ005
Dates: 10/13/04 through 09/07/22
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 = 3.5 
 Number of Observations = 74 
 Blind Sample ID = NS29  Mean = 2.62 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 72 
 Blind Sample ID = NS27  Mean = 3.74 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 84 
 Blind Sample ID = NS25  Mean = 0.90 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 66 
 Blind Sample ID = NS23  Mean = 0.41 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 84 
 Blind Sample ID = NS21  Mean = 0.39 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 92 
 Blind Sample ID = NS19  Mean = 0.44 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 4 
 Blind Sample ID = NS17X2  Mean = 0.89 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 71 
 Blind Sample ID = NS17  Mean = 0.23 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 51 
 Blind Sample ID = NS15  Mean = 0.51 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 20 
 Blind Sample ID = NS13  Mean = 0.28 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 22 
 Blind Sample ID = N99  Mean = 0.58 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = N98  Mean = 0.40 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 23 
 Blind Sample ID = N97  Mean = 0.98 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 22 
 Blind Sample ID = N96  Mean = 0.23 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 19 
 Blind Sample ID = N95  Mean = 0.74 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 24 
 Blind Sample ID = N94  Mean = 0.19 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 24 
 Blind Sample ID = N93  Mean = 1.48 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 23 
 Blind Sample ID = N92  Mean = 0.04 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 22 
 Blind Sample ID = N91  Mean = 0.46 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 24 
 Blind Sample ID = N90  Mean = 0.28 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 24 
 Blind Sample ID = N89  Mean = 1.15 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 24 
 Blind Sample ID = N88  Mean = 0.19 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 24 
 Blind Sample ID = N87  Mean = 1.32 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 23 
 Blind Sample ID = N86  Mean = 0.18 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 23 
 Blind Sample ID = N85  Mean = 0.70 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 23 
 Blind Sample ID = N84  Mean = 0.15 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 20 
 Blind Sample ID = N83  Mean = 0.29 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 8 
 Blind Sample ID = N154  Mean = 0.09 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 8 
 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 = 2.1 
 Number of Observations = 9 
 Blind Sample ID = N140  Mean = 0.12 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 8 
 Blind Sample ID = N139  Mean = 0.61 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 12 
 Blind Sample ID = N138  Mean = 0.13 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 12 
 Blind Sample ID = N137  Mean = 0.38 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 12 
 Blind Sample ID = N136  Mean = 0.16 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 12 
 Blind Sample ID = N135  Mean = 0.27 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 12 
 Blind Sample ID = N134  Mean = 0.11 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 12 
 Blind Sample ID = N133  Mean = 0.29 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 11 
 Blind Sample ID = N132  Mean = 0.06 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 12 
 Blind Sample ID = N131  Mean = 0.56 
 % Relative Standard Deviation = 1.0 
 Number of Observations = 12 
 Blind Sample ID = N130  Mean = 0.21 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 12 
 Blind Sample ID = N129  Mean = 0.42 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 12 
 Blind Sample ID = N128  Mean = 0.14 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 11 
 Blind Sample ID = N127  Mean = 0.48 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 12 
 Blind Sample ID = N126  Mean = 0.23 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 12 
 Blind Sample ID = N125  Mean = 0.19 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 12 
 Blind Sample ID = N124  Mean = 0.26 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 12 
 Blind Sample ID = N123  Mean = 0.56 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 12 
 Blind Sample ID = N122  Mean = 0.16 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 12 
 Blind Sample ID = N121  Mean = 0.65 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 10 
 Blind Sample ID = N120  Mean = 0.22 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 11 
 Blind Sample ID = N119  Mean = 0.87 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 12 
 Blind Sample ID = N118  Mean = 0.39 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 12 
 Blind Sample ID = N117  Mean = 0.41 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = N116  Mean = 0.24 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 24 
 Blind Sample ID = N115  Mean = 1.06 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 24 
 Blind Sample ID = N114  Mean = 0.25 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 24 
 Blind Sample ID = N113  Mean = 1.25 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 24 
 Blind Sample ID = N112  Mean = 0.28 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 24 
 Blind Sample ID = N111  Mean = 0.57 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 24 
 Blind Sample ID = N110  Mean = 0.27 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 24 
 Blind Sample ID = N109  Mean = 0.53 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 24 
 Blind Sample ID = N108  Mean = 0.17 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 24 
 Blind Sample ID = N107  Mean = 1.31 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 24 
 Blind Sample ID = N106  Mean = 0.26 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 24 
 Blind Sample ID = N105  Mean = 0.67 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = N104  Mean = 0.29 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 24 
 Blind Sample ID = N103  Mean = 1.22 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 24 
 Blind Sample ID = N102  Mean = 0.35 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = N101  Mean = 0.63 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 22 
 Blind Sample ID = N100
The SGPlot Procedure



- Phosphorus (as P), FIL, CFA, ACD, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: CL019
Dates: 11/10/04 through 10/07/11
Open Data Set

 Mean = 0.29 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 9 
 Blind Sample ID = N99  Mean = 0.06 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 12 
 Blind Sample ID = N98X  Mean = 0.13 
 % Relative Standard Deviation = 0.8 
 Number of Observations = 4 
 Blind Sample ID = N96Xc  Mean = 0.10 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 8 
 Blind Sample ID = N96X  Mean = 0.23 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 11 
 Blind Sample ID = N95  Mean = 0.08 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 12 
 Blind Sample ID = N94X  Mean = 0.19 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 11 
 Blind Sample ID = N93  Mean = 0.15 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 12 
 Blind Sample ID = N92X  Mean = 0.04 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 12 
 Blind Sample ID = N91  Mean = 0.05 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 12 
 Blind Sample ID = N90X  Mean = 0.12 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 12 
 Blind Sample ID = N88X  Mean = 0.19 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 11 
 Blind Sample ID = N87  Mean = 0.13 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 11 
 Blind Sample ID = N86X  Mean = 0.19 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 12 
 Blind Sample ID = N85  Mean = 0.15 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 4 
 Blind Sample ID = N83  Mean = 0.06 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 16 
 Blind Sample ID = N110X  Mean = 0.27 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 20 
 Blind Sample ID = N109  Mean = 0.05 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 12 
 Blind Sample ID = N108X  Mean = 0.17 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 12 
 Blind Sample ID = N107  Mean = 0.13 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 16 
 Blind Sample ID = N106X  Mean = 0.27 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 20 
 Blind Sample ID = N105  Mean = 0.07 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 11 
 Blind Sample ID = N104X  Mean = 0.30 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 12 
 Blind Sample ID = N103  Mean = 0.12 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 16 
 Blind Sample ID = N102X  Mean = 0.35 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 17 
 Blind Sample ID = N101  Mean = 0.07 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 12 
 Blind Sample ID = N100X
The SGPlot Procedure



- Phosphorus (as P), FIL, CFA, ACD-P, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: CL020
Dates: 10/20/04 through 09/29/22
Open Data Set

 Mean = 0.29 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 26 
 Blind Sample ID = N99  Mean = 0.06 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 36 
 Blind Sample ID = N98X  Mean = 0.13 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 8 
 Blind Sample ID = N96Xc  Mean = 0.10 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 26 
 Blind Sample ID = N96X  Mean = 0.18 
 % Relative Standard Deviation = 1.0 
 Number of Observations = 4 
 Blind Sample ID = N95c  Mean = 0.24 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 30 
 Blind Sample ID = N95  Mean = 0.08 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 35 
 Blind Sample ID = N94X  Mean = 0.19 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 35 
 Blind Sample ID = N93  Mean = 0.15 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 34 
 Blind Sample ID = N92X  Mean = 0.04 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 34 
 Blind Sample ID = N91  Mean = 0.05 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 35 
 Blind Sample ID = N90X  Mean = 0.12 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 35 
 Blind Sample ID = N88X  Mean = 0.19 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 20 
 Blind Sample ID = N87  Mean = 0.13 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 21 
 Blind Sample ID = N86X  Mean = 0.18 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 43 
 Blind Sample ID = N85  Mean = 0.07 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 20 
 Blind Sample ID = N84X  Mean = 0.16 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 40 
 Blind Sample ID = N83  Mean = 0.03 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 14 
 Blind Sample ID = N154X  Mean = 0.10 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 15 
 Blind Sample ID = N153  Mean = 0.03 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 12 
 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 = 3.1 
 Number of Observations = 11 
 Blind Sample ID = N140X  Mean = 0.13 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 12 
 Blind Sample ID = N139  Mean = 0.06 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 18 
 Blind Sample ID = N138X  Mean = 0.13 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 17 
 Blind Sample ID = N137  Mean = 0.04 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 15 
 Blind Sample ID = N136X  Mean = 0.17 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 15 
 Blind Sample ID = N135  Mean = 0.03 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 24 
 Blind Sample ID = N134X  Mean = 0.11 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 24 
 Blind Sample ID = N133  Mean = 0.03 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 21 
 Blind Sample ID = N132X  Mean = 0.07 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 21 
 Blind Sample ID = N131  Mean = 0.06 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 23 
 Blind Sample ID = N130X  Mean = 0.22 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 24 
 Blind Sample ID = N129  Mean = 0.04 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 23 
 Blind Sample ID = N128X  Mean = 0.15 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 23 
 Blind Sample ID = N127  Mean = 0.05 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 24 
 Blind Sample ID = N126X  Mean = 0.25 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 24 
 Blind Sample ID = N125  Mean = 0.02 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 24 
 Blind Sample ID = N124X  Mean = 0.28 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 24 
 Blind Sample ID = N123  Mean = 0.06 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = N122X  Mean = 0.17 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = N121  Mean = 0.07 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 21 
 Blind Sample ID = N120X  Mean = 0.24 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 21 
 Blind Sample ID = N119  Mean = 0.09 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 17 
 Blind Sample ID = N118X  Mean = 0.40 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 18 
 Blind Sample ID = N117  Mean = 0.04 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 36 
 Blind Sample ID = N116X  Mean = 0.25 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 36 
 Blind Sample ID = N115  Mean = 0.11 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 36 
 Blind Sample ID = N114X  Mean = 0.26 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 36 
 Blind Sample ID = N113  Mean = 0.12 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 36 
 Blind Sample ID = N112X  Mean = 0.29 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 36 
 Blind Sample ID = N111  Mean = 0.06 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 36 
 Blind Sample ID = N110X  Mean = 0.27 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 35 
 Blind Sample ID = N109  Mean = 0.05 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 36 
 Blind Sample ID = N108X  Mean = 0.17 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 36 
 Blind Sample ID = N107  Mean = 0.13 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 36 
 Blind Sample ID = N106X  Mean = 0.26 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 35 
 Blind Sample ID = N105  Mean = 0.07 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 36 
 Blind Sample ID = N104X  Mean = 0.30 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 36 
 Blind Sample ID = N103  Mean = 0.12 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 36 
 Blind Sample ID = N102X  Mean = 0.36 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 34 
 Blind Sample ID = N101  Mean = 0.06 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 31 
 Blind Sample ID = N100X
The SGPlot Procedure



- Phosphorus (as P), FIL, CFA, ALK-P -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: CL063
Dates: 10/13/04 through 09/26/22
Open Data Set

 Mean = 0.23 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 26 
 Blind Sample ID = NS15  Mean = 0.51 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 20 
 Blind Sample ID = NS13  Mean = 0.28 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 15 
 Blind Sample ID = N99  Mean = 0.58 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 12 
 Blind Sample ID = N98  Mean = 0.41 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 45 
 Blind Sample ID = N97  Mean = 0.98 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 11 
 Blind Sample ID = N96  Mean = 0.17 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 4 
 Blind Sample ID = N95c  Mean = 0.23 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 9 
 Blind Sample ID = N95  Mean = 0.75 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 12 
 Blind Sample ID = N94  Mean = 0.19 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = N93  Mean = 1.52 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 11 
 Blind Sample ID = N92  Mean = 0.04 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 11 
 Blind Sample ID = N91  Mean = 0.45 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 12 
 Blind Sample ID = N90  Mean = 0.28 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 44 
 Blind Sample ID = N89  Mean = 1.14 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 12 
 Blind Sample ID = N88  Mean = 0.18 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 27 
 Blind Sample ID = N87  Mean = 1.31 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 23 
 Blind Sample ID = N86  Mean = 0.17 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 22 
 Blind Sample ID = N85  Mean = 0.71 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 22 
 Blind Sample ID = N84  Mean = 0.15 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 18 
 Blind Sample ID = N83  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 = 4 
 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  Mean = 0.39 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 6 
 Blind Sample ID = N136  Mean = 0.16 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 6 
 Blind Sample ID = N135  Mean = 0.27 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 6 
 Blind Sample ID = N134  Mean = 0.11 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 6 
 Blind Sample ID = N133  Mean = 0.30 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 6 
 Blind Sample ID = N132  Mean = 0.07 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 6 
 Blind Sample ID = N131  Mean = 0.58 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 6 
 Blind Sample ID = N130  Mean = 0.22 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 6 
 Blind Sample ID = N129  Mean = 0.43 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 6 
 Blind Sample ID = N128  Mean = 0.15 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 6 
 Blind Sample ID = N127  Mean = 0.50 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 6 
 Blind Sample ID = N126  Mean = 0.24 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 6 
 Blind Sample ID = N125  Mean = 0.19 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 6 
 Blind Sample ID = N124  Mean = 0.28 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 6 
 Blind Sample ID = N123  Mean = 0.56 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 6 
 Blind Sample ID = N122  Mean = 0.16 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 6 
 Blind Sample ID = N121  Mean = 0.64 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 5 
 Blind Sample ID = N120  Mean = 0.23 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 6 
 Blind Sample ID = N119  Mean = 0.89 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 6 
 Blind Sample ID = N118  Mean = 0.40 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 6 
 Blind Sample ID = N117  Mean = 0.40 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 11 
 Blind Sample ID = N116  Mean = 0.23 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 10 
 Blind Sample ID = N115  Mean = 1.07 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 12 
 Blind Sample ID = N114  Mean = 0.25 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 11 
 Blind Sample ID = N113  Mean = 1.25 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 12 
 Blind Sample ID = N112  Mean = 0.29 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 12 
 Blind Sample ID = N111  Mean = 0.57 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 12 
 Blind Sample ID = N110  Mean = 0.27 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 12 
 Blind Sample ID = N109  Mean = 0.52 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 11 
 Blind Sample ID = N108  Mean = 0.16 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 12 
 Blind Sample ID = N107  Mean = 1.33 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 12 
 Blind Sample ID = N106  Mean = 0.26 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 13 
 Blind Sample ID = N105  Mean = 0.66 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 12 
 Blind Sample ID = N104  Mean = 0.29 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 12 
 Blind Sample ID = N103  Mean = 1.21 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 12 
 Blind Sample ID = N102  Mean = 0.36 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 14 
 Blind Sample ID = N101  Mean = 0.63 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 11 
 Blind Sample ID = N100
The SGPlot Procedure



- Phosphorus (as P), FIL, CFA, ALK-P, ACD -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00666, MCode: CL062
Dates: 10/19/04 through 05/20/09
Open Data Set

 Mean = 0.29 
 % Relative Standard Deviation = 0.4 
 Number of Observations = 3 
 Blind Sample ID = N99  Mean = 0.40 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 10 
 Blind Sample ID = N97  Mean = 0.45 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 12 
 Blind Sample ID = N90  Mean = 0.28 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 24 
 Blind Sample ID = N89  Mean = 1.10 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 8 
 Blind Sample ID = N88  Mean = 0.18 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 4 
 Blind Sample ID = N87  Mean = 1.30 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 11 
 Blind Sample ID = N86  Mean = 0.18 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 12 
 Blind Sample ID = N85  Mean = 0.69 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 14 
 Blind Sample ID = N84  Mean = 0.15 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 8 
 Blind Sample ID = N83  Mean = 0.35 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 3 
 Blind Sample ID = N101
The SGPlot Procedure



- Phosphorus (as P), UNF, ASF, Kjeldahl -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00665, MCode: KJ009
Dates: 10/12/04 through 09/26/22
Open Data Set

 Mean = 1.96 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 49 
 Blind Sample ID = NS31  Mean = 2.23 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 75 
 Blind Sample ID = NS29  Mean = 2.60 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 71 
 Blind Sample ID = NS27  Mean = 3.72 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 84 
 Blind Sample ID = NS25  Mean = 0.88 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 66 
 Blind Sample ID = NS23  Mean = 0.41 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 84 
 Blind Sample ID = NS21  Mean = 0.39 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 92 
 Blind Sample ID = NS19  Mean = 0.44 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 4 
 Blind Sample ID = NS17X2  Mean = 0.88 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 71 
 Blind Sample ID = NS17  Mean = 0.23 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 51 
 Blind Sample ID = NS15  Mean = 0.51 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 20 
 Blind Sample ID = NS13  Mean = 0.28 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 22 
 Blind Sample ID = N99  Mean = 0.58 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 24 
 Blind Sample ID = N98  Mean = 0.40 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 23 
 Blind Sample ID = N97  Mean = 0.97 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 22 
 Blind Sample ID = N96  Mean = 0.22 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 19 
 Blind Sample ID = N95  Mean = 0.74 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 24 
 Blind Sample ID = N94  Mean = 0.18 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 24 
 Blind Sample ID = N93  Mean = 1.48 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 23 
 Blind Sample ID = N92  Mean = 0.04 
 % Relative Standard Deviation = 29.6 
 Number of Observations = 21 
 Blind Sample ID = N91  Mean = 0.46 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 24 
 Blind Sample ID = N90  Mean = 0.28 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = N89  Mean = 1.15 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 24 
 Blind Sample ID = N88  Mean = 0.19 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = N87  Mean = 1.31 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 23 
 Blind Sample ID = N86  Mean = 0.17 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 23 
 Blind Sample ID = N85  Mean = 0.70 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 23 
 Blind Sample ID = N84  Mean = 0.15 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 20 
 Blind Sample ID = N83  Mean = 0.29 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 6 
 Blind Sample ID = N154  Mean = 0.09 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 6 
 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 = 2.1 
 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 = 2.9 
 Number of Observations = 9 
 Blind Sample ID = N140  Mean = 0.12 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 8 
 Blind Sample ID = N139  Mean = 0.62 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 12 
 Blind Sample ID = N138  Mean = 0.13 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 12 
 Blind Sample ID = N137  Mean = 0.38 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 12 
 Blind Sample ID = N136  Mean = 0.16 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 11 
 Blind Sample ID = N135  Mean = 0.27 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 12 
 Blind Sample ID = N134  Mean = 0.11 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 12 
 Blind Sample ID = N133  Mean = 0.29 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 11 
 Blind Sample ID = N132  Mean = 0.06 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 12 
 Blind Sample ID = N131  Mean = 0.56 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 12 
 Blind Sample ID = N130  Mean = 0.21 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 12 
 Blind Sample ID = N129  Mean = 0.42 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 12 
 Blind Sample ID = N128  Mean = 0.14 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 11 
 Blind Sample ID = N127  Mean = 0.48 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 12 
 Blind Sample ID = N126  Mean = 0.23 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 12 
 Blind Sample ID = N125  Mean = 0.19 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 12 
 Blind Sample ID = N124  Mean = 0.27 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 12 
 Blind Sample ID = N123  Mean = 0.56 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 12 
 Blind Sample ID = N122  Mean = 0.16 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 12 
 Blind Sample ID = N121  Mean = 0.64 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 10 
 Blind Sample ID = N120  Mean = 0.22 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 11 
 Blind Sample ID = N119  Mean = 0.88 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 12 
 Blind Sample ID = N118  Mean = 0.38 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 12 
 Blind Sample ID = N117  Mean = 0.40 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 24 
 Blind Sample ID = N116  Mean = 0.24 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 24 
 Blind Sample ID = N115  Mean = 1.06 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 24 
 Blind Sample ID = N114  Mean = 0.25 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 24 
 Blind Sample ID = N113  Mean = 1.25 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 24 
 Blind Sample ID = N112  Mean = 0.27 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 24 
 Blind Sample ID = N111  Mean = 0.57 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = N110  Mean = 0.27 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = N109  Mean = 0.52 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = N108  Mean = 0.16 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 24 
 Blind Sample ID = N107  Mean = 1.30 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 24 
 Blind Sample ID = N106  Mean = 0.25 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 24 
 Blind Sample ID = N105  Mean = 0.66 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 24 
 Blind Sample ID = N104  Mean = 0.29 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 24 
 Blind Sample ID = N103  Mean = 1.21 
 % Relative Standard Deviation = 1.0 
 Number of Observations = 24 
 Blind Sample ID = N102  Mean = 0.35 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 24 
 Blind Sample ID = N101  Mean = 0.62 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 22 
 Blind Sample ID = N100
The SGPlot Procedure



- Phosphorus (as P), UNF, CFA, ACD-P, LL -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00665, MCode: CL021
Dates: 10/21/04 through 09/27/22
Open Data Set

 Mean = 0.29 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 32 
 Blind Sample ID = N99  Mean = 0.06 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 36 
 Blind Sample ID = N98X  Mean = 0.13 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = N96Xc  Mean = 0.10 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 26 
 Blind Sample ID = N96X  Mean = 0.18 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 4 
 Blind Sample ID = N95c  Mean = 0.23 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 31 
 Blind Sample ID = N95  Mean = 0.08 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 35 
 Blind Sample ID = N94X  Mean = 0.19 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 35 
 Blind Sample ID = N93  Mean = 0.15 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 35 
 Blind Sample ID = N92X  Mean = 0.04 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 34 
 Blind Sample ID = N91  Mean = 0.05 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 36 
 Blind Sample ID = N90X  Mean = 0.12 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 36 
 Blind Sample ID = N88X  Mean = 0.19 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 35 
 Blind Sample ID = N87  Mean = 0.13 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 22 
 Blind Sample ID = N86X  Mean = 0.18 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 46 
 Blind Sample ID = N85  Mean = 0.07 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 21 
 Blind Sample ID = N84X  Mean = 0.16 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 40 
 Blind Sample ID = N83  Mean = 0.03 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 13 
 Blind Sample ID = N154X  Mean = 0.10 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 14 
 Blind Sample ID = N153  Mean = 0.03 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 12 
 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 = 3.4 
 Number of Observations = 12 
 Blind Sample ID = N140X  Mean = 0.13 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 12 
 Blind Sample ID = N139  Mean = 0.06 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 18 
 Blind Sample ID = N138X  Mean = 0.13 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 18 
 Blind Sample ID = N137  Mean = 0.04 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 15 
 Blind Sample ID = N136X  Mean = 0.17 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 15 
 Blind Sample ID = N135  Mean = 0.03 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 24 
 Blind Sample ID = N134X  Mean = 0.12 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 24 
 Blind Sample ID = N133  Mean = 0.03 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 21 
 Blind Sample ID = N132X  Mean = 0.07 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 21 
 Blind Sample ID = N131  Mean = 0.06 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 23 
 Blind Sample ID = N130X  Mean = 0.23 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 24 
 Blind Sample ID = N129  Mean = 0.04 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 22 
 Blind Sample ID = N128X  Mean = 0.15 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 23 
 Blind Sample ID = N127  Mean = 0.05 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 24 
 Blind Sample ID = N126X  Mean = 0.25 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 24 
 Blind Sample ID = N125  Mean = 0.02 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 24 
 Blind Sample ID = N124X  Mean = 0.28 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 24 
 Blind Sample ID = N123  Mean = 0.06 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 24 
 Blind Sample ID = N122X  Mean = 0.17 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 24 
 Blind Sample ID = N121  Mean = 0.07 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 21 
 Blind Sample ID = N120X  Mean = 0.24 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 20 
 Blind Sample ID = N119  Mean = 0.09 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 18 
 Blind Sample ID = N118X  Mean = 0.40 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 18 
 Blind Sample ID = N117  Mean = 0.04 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 36 
 Blind Sample ID = N116X  Mean = 0.24 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 36 
 Blind Sample ID = N115  Mean = 0.11 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 36 
 Blind Sample ID = N114X  Mean = 0.26 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 36 
 Blind Sample ID = N113  Mean = 0.13 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 36 
 Blind Sample ID = N112X  Mean = 0.28 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 36 
 Blind Sample ID = N111  Mean = 0.06 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 36 
 Blind Sample ID = N110X  Mean = 0.27 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 36 
 Blind Sample ID = N109  Mean = 0.05 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 36 
 Blind Sample ID = N108X  Mean = 0.17 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 36 
 Blind Sample ID = N107  Mean = 0.13 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 36 
 Blind Sample ID = N106X  Mean = 0.26 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 36 
 Blind Sample ID = N105  Mean = 0.07 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 36 
 Blind Sample ID = N104X  Mean = 0.30 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 36 
 Blind Sample ID = N103  Mean = 0.12 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 36 
 Blind Sample ID = N102X  Mean = 0.35 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 31 
 Blind Sample ID = N101  Mean = 0.07 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 35 
 Blind Sample ID = N100X
The SGPlot Procedure



- Phosphorus (as P), UNF, CFA, ALK-P, ACD -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 00665, MCode: AKP01
Dates: 10/13/04 through 09/27/22
Open Data Set

 Mean = 0.23 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 27 
 Blind Sample ID = NS15  Mean = 0.51 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 20 
 Blind Sample ID = NS13  Mean = 0.28 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 25 
 Blind Sample ID = N99  Mean = 0.58 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 24 
 Blind Sample ID = N98  Mean = 0.40 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 56 
 Blind Sample ID = N97  Mean = 0.97 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 22 
 Blind Sample ID = N96  Mean = 0.18 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 4 
 Blind Sample ID = N95c  Mean = 0.23 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 20 
 Blind Sample ID = N95  Mean = 0.75 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 20 
 Blind Sample ID = N94  Mean = 0.19 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = N93  Mean = 1.50 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 22 
 Blind Sample ID = N92  Mean = 0.04 
 % Relative Standard Deviation = 18.1 
 Number of Observations = 23 
 Blind Sample ID = N91  Mean = 0.45 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 22 
 Blind Sample ID = N90  Mean = 0.28 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 58 
 Blind Sample ID = N89  Mean = 1.13 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 24 
 Blind Sample ID = N88  Mean = 0.18 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 25 
 Blind Sample ID = N87  Mean = 1.31 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 23 
 Blind Sample ID = N86  Mean = 0.18 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 19 
 Blind Sample ID = N85  Mean = 0.69 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 22 
 Blind Sample ID = N84  Mean = 0.15 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 18 
 Blind Sample ID = N83  Mean = 0.28 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 6 
 Blind Sample ID = N154  Mean = 0.09 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 4 
 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  Mean = 0.59 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 6 
 Blind Sample ID = N138  Mean = 0.13 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 6 
 Blind Sample ID = N137  Mean = 0.39 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 6 
 Blind Sample ID = N136  Mean = 0.17 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 6 
 Blind Sample ID = N135  Mean = 0.27 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 6 
 Blind Sample ID = N134  Mean = 0.11 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 6 
 Blind Sample ID = N133  Mean = 0.30 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 6 
 Blind Sample ID = N132  Mean = 0.07 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 6 
 Blind Sample ID = N131  Mean = 0.58 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 6 
 Blind Sample ID = N130  Mean = 0.22 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 6 
 Blind Sample ID = N129  Mean = 0.42 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 6 
 Blind Sample ID = N128  Mean = 0.14 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 6 
 Blind Sample ID = N127  Mean = 0.51 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 6 
 Blind Sample ID = N126  Mean = 0.25 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 6 
 Blind Sample ID = N125  Mean = 0.19 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 6 
 Blind Sample ID = N124  Mean = 0.27 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 6 
 Blind Sample ID = N123  Mean = 0.57 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 6 
 Blind Sample ID = N122  Mean = 0.16 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 6 
 Blind Sample ID = N121  Mean = 0.66 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 5 
 Blind Sample ID = N120  Mean = 0.23 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 6 
 Blind Sample ID = N119  Mean = 0.87 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 6 
 Blind Sample ID = N118  Mean = 0.38 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 6 
 Blind Sample ID = N117  Mean = 0.41 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 12 
 Blind Sample ID = N116  Mean = 0.24 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 12 
 Blind Sample ID = N115  Mean = 1.08 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 9 
 Blind Sample ID = N114  Mean = 0.25 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 12 
 Blind Sample ID = N113  Mean = 0.57 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 16 
 Blind Sample ID = N110  Mean = 0.27 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 17 
 Blind Sample ID = N109  Mean = 0.53 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = N108  Mean = 0.16 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 24 
 Blind Sample ID = N107  Mean = 1.31 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 24 
 Blind Sample ID = N106  Mean = 0.25 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = N105  Mean = 0.67 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = N104  Mean = 0.29 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 24 
 Blind Sample ID = N103  Mean = 1.22 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 23 
 Blind Sample ID = N102  Mean = 0.34 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 25 
 Blind Sample ID = N101  Mean = 0.62 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 22 
 Blind Sample ID = N100
The SGPlot Procedure



- Total Nitrogen (NH3+NO3+NO2+org N as N), FIL, CFA, ALK-P -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 62854, MCode: CL063
Dates: 10/13/04 through 09/26/22
Open Data Set

 Mean = 0.86 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 27 
 Blind Sample ID = NS15  Mean = 2.83 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 20 
 Blind Sample ID = NS13  Mean = 0.38 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 32 
 Blind Sample ID = N99  Mean = 1.70 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 36 
 Blind Sample ID = N98  Mean = 0.73 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 32 
 Blind Sample ID = N97  Mean = 1.88 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 34 
 Blind Sample ID = N96  Mean = 0.22 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 5 
 Blind Sample ID = N95c  Mean = 0.28 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 27 
 Blind Sample ID = N95  Mean = 1.67 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 32 
 Blind Sample ID = N94  Mean = 0.31 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 36 
 Blind Sample ID = N93  Mean = 2.52 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 34 
 Blind Sample ID = N92  Mean = 0.21 
 % Relative Standard Deviation = 18.5 
 Number of Observations = 35 
 Blind Sample ID = N91  Mean = 1.27 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 36 
 Blind Sample ID = N90  Mean = 0.56 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 34 
 Blind Sample ID = N89  Mean = 2.62 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 36 
 Blind Sample ID = N88  Mean = 0.48 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 36 
 Blind Sample ID = N87  Mean = 1.68 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 23 
 Blind Sample ID = N86  Mean = 0.34 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 19 
 Blind Sample ID = N85  Mean = 2.31 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 22 
 Blind Sample ID = N84  Mean = 0.30 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 19 
 Blind Sample ID = N83  Mean = 1.10 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 14 
 Blind Sample ID = N154  Mean = 0.49 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 13 
 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 = 3.2 
 Number of Observations = 13 
 Blind Sample ID = N140  Mean = 0.30 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 12 
 Blind Sample ID = N139  Mean = 1.27 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 16 
 Blind Sample ID = N138  Mean = 0.46 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 18 
 Blind Sample ID = N137  Mean = 1.06 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 18 
 Blind Sample ID = N136  Mean = 0.61 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 18 
 Blind Sample ID = N135  Mean = 1.00 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 18 
 Blind Sample ID = N134  Mean = 0.19 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 18 
 Blind Sample ID = N133  Mean = 1.26 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 17 
 Blind Sample ID = N132  Mean = 0.49 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 18 
 Blind Sample ID = N131  Mean = 2.40 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 18 
 Blind Sample ID = N130  Mean = 0.48 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 18 
 Blind Sample ID = N129  Mean = 3.63 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 18 
 Blind Sample ID = N128  Mean = 0.45 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 18 
 Blind Sample ID = N127  Mean = 1.90 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 18 
 Blind Sample ID = N126  Mean = 0.46 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 18 
 Blind Sample ID = N125  Mean = 0.74 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 18 
 Blind Sample ID = N124  Mean = 0.54 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 18 
 Blind Sample ID = N123  Mean = 1.69 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 23 
 Blind Sample ID = N122  Mean = 0.57 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 24 
 Blind Sample ID = N121  Mean = 1.23 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 21 
 Blind Sample ID = N120  Mean = 0.52 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 21 
 Blind Sample ID = N119  Mean = 1.55 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 18 
 Blind Sample ID = N118  Mean = 0.64 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 17 
 Blind Sample ID = N117  Mean = 0.86 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 35 
 Blind Sample ID = N116  Mean = 0.47 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 36 
 Blind Sample ID = N115  Mean = 2.25 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 36 
 Blind Sample ID = N114  Mean = 0.34 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 36 
 Blind Sample ID = N113  Mean = 2.30 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 36 
 Blind Sample ID = N112  Mean = 0.60 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 36 
 Blind Sample ID = N111  Mean = 2.18 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 35 
 Blind Sample ID = N110  Mean = 0.40 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 33 
 Blind Sample ID = N109  Mean = 1.47 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 35 
 Blind Sample ID = N108  Mean = 0.36 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 36 
 Blind Sample ID = N107  Mean = 2.31 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 36 
 Blind Sample ID = N106  Mean = 0.45 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 36 
 Blind Sample ID = N105  Mean = 1.59 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 36 
 Blind Sample ID = N104  Mean = 0.60 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 36 
 Blind Sample ID = N103  Mean = 1.91 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 35 
 Blind Sample ID = N102  Mean = 0.74 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 36 
 Blind Sample ID = N101  Mean = 1.48 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 34 
 Blind Sample ID = N100
The SGPlot Procedure



- Total Nitrogen (NH3+NO3+NO2+org N as N), FIL, CFA, ALK-P, ACD -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 62854, MCode: CL062
Dates: 10/19/04 through 10/07/05
Open Data Set

 Mean = 1.69 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 11 
 Blind Sample ID = N86  Mean = 0.35 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 12 
 Blind Sample ID = N85  Mean = 2.28 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 10 
 Blind Sample ID = N84  Mean = 0.32 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 8 
 Blind Sample ID = N83
The SGPlot Procedure



- Total Nitrogen (NH3+NO3+NO2+org N as N), UNF, CFA, ALK-P, ACD -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 62855, MCode: AKP01
Dates: 10/13/04 through 09/27/22
Open Data Set

 Mean = 0.84 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 27 
 Blind Sample ID = NS15  Mean = 2.85 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 20 
 Blind Sample ID = NS13  Mean = 0.37 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 32 
 Blind Sample ID = N99  Mean = 1.69 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 36 
 Blind Sample ID = N98  Mean = 0.71 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 32 
 Blind Sample ID = N97  Mean = 1.87 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 34 
 Blind Sample ID = N96  Mean = 0.27 
 % Relative Standard Deviation = 33.7 
 Number of Observations = 5 
 Blind Sample ID = N95c  Mean = 0.26 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 27 
 Blind Sample ID = N95  Mean = 1.67 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 32 
 Blind Sample ID = N94  Mean = 0.31 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 36 
 Blind Sample ID = N93  Mean = 2.50 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 34 
 Blind Sample ID = N92  Mean = 0.21 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 35 
 Blind Sample ID = N91  Mean = 1.25 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 34 
 Blind Sample ID = N90  Mean = 0.55 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 36 
 Blind Sample ID = N89  Mean = 2.60 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 36 
 Blind Sample ID = N88  Mean = 0.46 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 36 
 Blind Sample ID = N87  Mean = 1.69 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 23 
 Blind Sample ID = N86  Mean = 0.35 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 19 
 Blind Sample ID = N85  Mean = 2.29 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 22 
 Blind Sample ID = N84  Mean = 0.31 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 18 
 Blind Sample ID = N83  Mean = 1.10 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 14 
 Blind Sample ID = N154  Mean = 0.47 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 14 
 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 = 2.5 
 Number of Observations = 13 
 Blind Sample ID = N140  Mean = 0.29 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 12 
 Blind Sample ID = N139  Mean = 1.27 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 18 
 Blind Sample ID = N138  Mean = 0.44 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 18 
 Blind Sample ID = N137  Mean = 1.04 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 18 
 Blind Sample ID = N136  Mean = 0.63 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 18 
 Blind Sample ID = N135  Mean = 0.98 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 18 
 Blind Sample ID = N134  Mean = 0.19 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 18 
 Blind Sample ID = N133  Mean = 1.25 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 17 
 Blind Sample ID = N132  Mean = 0.48 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 18 
 Blind Sample ID = N131  Mean = 2.41 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 18 
 Blind Sample ID = N130  Mean = 0.48 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 17 
 Blind Sample ID = N129  Mean = 3.62 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 18 
 Blind Sample ID = N128  Mean = 0.44 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 18 
 Blind Sample ID = N127  Mean = 1.88 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 18 
 Blind Sample ID = N126  Mean = 0.46 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 18 
 Blind Sample ID = N125  Mean = 0.74 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 18 
 Blind Sample ID = N124  Mean = 0.54 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 18 
 Blind Sample ID = N123  Mean = 1.68 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 24 
 Blind Sample ID = N122  Mean = 0.57 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 24 
 Blind Sample ID = N121  Mean = 1.22 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 21 
 Blind Sample ID = N120  Mean = 0.53 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 21 
 Blind Sample ID = N119  Mean = 1.49 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 17 
 Blind Sample ID = N118  Mean = 0.63 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 17 
 Blind Sample ID = N117  Mean = 0.84 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 36 
 Blind Sample ID = N116  Mean = 0.44 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 36 
 Blind Sample ID = N115  Mean = 2.16 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 35 
 Blind Sample ID = N114  Mean = 0.32 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 36 
 Blind Sample ID = N113  Mean = 2.31 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 36 
 Blind Sample ID = N112  Mean = 0.59 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 36 
 Blind Sample ID = N111  Mean = 2.16 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 36 
 Blind Sample ID = N110  Mean = 0.42 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 36 
 Blind Sample ID = N109  Mean = 1.47 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 36 
 Blind Sample ID = N108  Mean = 0.36 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 36 
 Blind Sample ID = N107  Mean = 2.28 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 36 
 Blind Sample ID = N106  Mean = 0.45 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 36 
 Blind Sample ID = N105  Mean = 1.58 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 36 
 Blind Sample ID = N104  Mean = 0.60 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 36 
 Blind Sample ID = N103  Mean = 1.90 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 35 
 Blind Sample ID = N102  Mean = 0.72 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 32 
 Blind Sample ID = N101  Mean = 1.47 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 34 
 Blind Sample ID = N100
The SGPlot Procedure