- Aluminum, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01106, MCode: PLM10
Dates: 02/08/19 through 09/29/22
Open Data Set

 Mean = 804.39 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 13 
 Blind Sample ID = T243  Mean = 189.80 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 263.31 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 818.69 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 958.98 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 476.72 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 534.57 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 35 
 Blind Sample ID = T231  Mean = 668.18 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 37 
 Blind Sample ID = T229  Mean = 626.27 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 25 
 Blind Sample ID = T227  Mean = 247.70 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 26 
 Blind Sample ID = T225  Mean = 541.32 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 11 
 Blind Sample ID = T223  Mean = 386.36 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 9 
 Blind Sample ID = T221
The SGPlot Procedure



- Aluminum, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01106, MCode: PLM43
Dates: 10/13/04 through 01/29/19
Open Data Set

 Mean = 590.22 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 15 
 Blind Sample ID = T227  Mean = 227.57 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 21 
 Blind Sample ID = T225  Mean = 537.00 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 36 
 Blind Sample ID = T223  Mean = 376.25 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 36 
 Blind Sample ID = T221  Mean = 848.60 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 41 
 Blind Sample ID = T219  Mean = 48.57 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 41 
 Blind Sample ID = T217  Mean = 127.49 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 15.81 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 31 
 Blind Sample ID = T211  Mean = 21.34 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 14 
 Blind Sample ID = T209  Mean = 213.00 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 34 
 Blind Sample ID = 75213-25DIW  Mean = 11.54 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 16.00 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 26 
 Blind Sample ID = 75209-25DIW  Mean = 242.94 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 25.18 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 32 
 Blind Sample ID = 75205-25DIW  Mean = 82.77 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 61.08 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 43 
 Blind Sample ID = 75201-25DIW  Mean = 92.97 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 84.29 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 55 
 Blind Sample ID = 75197-25DIW  Mean = 144.28 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 33.72 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 47 
 Blind Sample ID = 75193-25DIW  Mean = 61.85 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 44.71 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 13.22 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 48 
 Blind Sample ID = 75189-25DIW  Mean = 23.78 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 26.88 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 47.46 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 40 
 Blind Sample ID = 75187-25DIW  Mean = 19.52 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 93.13 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 40 
 Blind Sample ID = 75183-25DIW  Mean = 14.26 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 41.55 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 52 
 Blind Sample ID = 75179-25DIW  Mean = 40.68 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 27 
 Blind Sample ID = 75175-25DIW  Mean = 57.43 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 19 
 Blind Sample ID = 50187-50191  Mean = 39.07 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 14 
 Blind Sample ID = 50187-50189  Mean = 93.76 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 23 
 Blind Sample ID = 50187-50183  Mean = 43.58 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 19 
 Blind Sample ID = 50185-50187  Mean = 72.70 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 17 
 Blind Sample ID = 50183-50185  Mean = 64.42 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 26 
 Blind Sample ID = 50177-50179  Mean = 27.67 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 53 
 Blind Sample ID = 50175-50DIW  Mean = 60.89 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 38.54 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 32 
 Blind Sample ID = 50173-50DIW  Mean = 11.05 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 32 
 Blind Sample ID = 50171-50DIW  Mean = 47.94 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 82.25 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 19.12 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 14 
 Blind Sample ID = 25211-75209  Mean = 217.86 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 245.36 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 13 
 Blind Sample ID = 25209-75207  Mean = 108.77 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 13 
 Blind Sample ID = 25207-75205  Mean = 23.70 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 70.66 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 53.46 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 103.62 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 103.41 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 21 
 Blind Sample ID = 25201-75197  Mean = 86.19 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 100.85 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 19 
 Blind Sample ID = 25197-75199  Mean = 120.35 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 129.81 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 19 
 Blind Sample ID = 25193-75195  Mean = 47.73 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 47.02 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 47.11 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 22 
 Blind Sample ID = 25181-75179  Mean = 106.30 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 68.66 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 28 
 Blind Sample ID = 25179-75177  Mean = 60.51 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 35 
 Blind Sample ID = 25177-75175  Mean = 45.69 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 25 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Aluminum, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01106, MCode: PLA13
Dates: 11/05/04 through 08/04/05
Open Data Set

 Mean = 70.13 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 4 
 Blind Sample ID = 50175-50173  Mean = 57.78 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 3 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Aluminum, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01105, MCode: PLM48
Dates: 11/01/04 through 04/30/15
Open Data Set

 Mean = 221.08 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 4 
 Blind Sample ID = 75213-25DIW  Mean = 11.96 
 % Relative Standard Deviation = 26.6 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 15.76 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 233.26 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 24.46 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 21 
 Blind Sample ID = 75205-25DIW  Mean = 80.70 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 60.38 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 24 
 Blind Sample ID = 75201-25DIW  Mean = 88.18 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 8 
 Blind Sample ID = 75199-25201  Mean = 84.02 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 24 
 Blind Sample ID = 75197-25DIW  Mean = 145.60 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 75195-25197  Mean = 35.09 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 16 
 Blind Sample ID = 75193-25DIW  Mean = 61.92 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 8 
 Blind Sample ID = 75193-25197  Mean = 48.59 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 16 
 Blind Sample ID = 75191-25DIW  Mean = 14.45 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 15 
 Blind Sample ID = 75189-25DIW  Mean = 24.43 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 7 
 Blind Sample ID = 75189-25193  Mean = 28.59 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 8 
 Blind Sample ID = 75189-25191  Mean = 52.32 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 15 
 Blind Sample ID = 75187-25DIW  Mean = 20.26 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 75185-25DIW  Mean = 92.21 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 15 
 Blind Sample ID = 75183-25DIW  Mean = 14.61 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 8 
 Blind Sample ID = 75181-25DIW  Mean = 38.85 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 21 
 Blind Sample ID = 75179-25DIW  Mean = 38.72 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 15 
 Blind Sample ID = 75175-25DIW  Mean = 63.02 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 50187-50191  Mean = 44.28 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 7 
 Blind Sample ID = 50187-50189  Mean = 95.10 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 8 
 Blind Sample ID = 50187-50183  Mean = 45.48 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 8 
 Blind Sample ID = 50185-50187  Mean = 75.20 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 8 
 Blind Sample ID = 50183-50185  Mean = 62.34 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 16 
 Blind Sample ID = 50177-50179  Mean = 26.80 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 22 
 Blind Sample ID = 50175-50DIW  Mean = 59.59 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 12 
 Blind Sample ID = 50175-50173  Mean = 35.86 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 13 
 Blind Sample ID = 50173-50DIW  Mean = 10.93 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 8 
 Blind Sample ID = 50171-50DIW  Mean = 45.83 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 12 
 Blind Sample ID = 50171-50173  Mean = 83.58 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 18.74 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 220.58 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213  Mean = 252.88 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 108.56 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 24.09 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 68.16 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 16 
 Blind Sample ID = 25205-75201  Mean = 51.39 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 98.92 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 15 
 Blind Sample ID = 25201-75203  Mean = 103.27 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 8 
 Blind Sample ID = 25201-75197  Mean = 99.77 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 8 
 Blind Sample ID = 25197-75199  Mean = 119.79 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 8 
 Blind Sample ID = 25195-75197  Mean = 128.76 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 8 
 Blind Sample ID = 25193-75195  Mean = 50.79 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 8 
 Blind Sample ID = 25191-75193  Mean = 43.66 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 7 
 Blind Sample ID = 25183-75181  Mean = 46.30 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = 25181-75179  Mean = 98.32 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 8 
 Blind Sample ID = 25179-75183  Mean = 67.03 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 16 
 Blind Sample ID = 25179-75177  Mean = 56.79 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 16 
 Blind Sample ID = 25177-75175  Mean = 41.84 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 8 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Aluminum, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01105, MCode: PLM77
Dates: 02/05/19 through 08/26/22
Open Data Set

 Mean = 821.64 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 187.91 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 263.60 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 795.87 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 942.84 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 23 
 Blind Sample ID = T235  Mean = 464.73 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 514.02 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 21 
 Blind Sample ID = T231  Mean = 666.61 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 19 
 Blind Sample ID = T229  Mean = 601.81 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 16 
 Blind Sample ID = T227  Mean = 249.22 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 15 
 Blind Sample ID = T225  Mean = 508.36 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 7 
 Blind Sample ID = T223  Mean = 357.96 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 4 
 Blind Sample ID = T221
The SGPlot Procedure



- Aluminum, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01105, MCode: PLM78
Dates: 05/12/15 through 11/27/18
Open Data Set

 Mean = 607.03 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 8 
 Blind Sample ID = T227  Mean = 239.64 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 8 
 Blind Sample ID = T225  Mean = 532.12 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 15 
 Blind Sample ID = T223  Mean = 370.22 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 18 
 Blind Sample ID = T221  Mean = 831.96 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 26 
 Blind Sample ID = T219  Mean = 49.17 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 26 
 Blind Sample ID = T217  Mean = 123.58 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 18 
 Blind Sample ID = T215  Mean = 14.73 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 20 
 Blind Sample ID = T211  Mean = 22.25 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 11 
 Blind Sample ID = T209  Mean = 212.43 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 18 
 Blind Sample ID = 75213-25DIW  Mean = 11.07 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 6 
 Blind Sample ID = 75211-25DIW  Mean = 82.70 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 18.72 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 6 
 Blind Sample ID = 25211-75209  Mean = 213.63 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 6 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Antimony, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01095, MCode: PLM43
Dates: 10/13/04 through 09/29/22
Open Data Set

 Mean = 2.49 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 13 
 Blind Sample ID = T243  Mean = 0.16 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 2.60 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 0.26 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 0.08 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 1.67 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 0.22 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 3.26 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 2.81 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 40 
 Blind Sample ID = T227  Mean = 1.88 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 4.93 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 47 
 Blind Sample ID = T223  Mean = 1.03 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 46 
 Blind Sample ID = T221  Mean = 1.25 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 42 
 Blind Sample ID = T219  Mean = 0.17 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 42 
 Blind Sample ID = T217  Mean = 1.61 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 2.45 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 31 
 Blind Sample ID = T211  Mean = 0.33 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 15 
 Blind Sample ID = T209  Mean = 1.82 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 0.25 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 26 
 Blind Sample ID = 75209-25DIW  Mean = 0.09 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 1.32 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 32 
 Blind Sample ID = 75205-25DIW  Mean = 0.34 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 11.30 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 43 
 Blind Sample ID = 75201-25DIW  Mean = 3.79 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 0.21 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 0.72 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 19 
 Blind Sample ID = 75195-25197  Mean = 1.24 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 1.26 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 1.42 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 0.27 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 48 
 Blind Sample ID = 75189-25DIW  Mean = 0.71 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 0.76 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 0.18 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 41 
 Blind Sample ID = 75187-25DIW  Mean = 0.45 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 3.60 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 40 
 Blind Sample ID = 75183-25DIW  Mean = 2.65 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 2.78 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 52 
 Blind Sample ID = 75179-25DIW  Mean = 1.47 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 27 
 Blind Sample ID = 75175-25DIW  Mean = 0.98 
 % Relative Standard Deviation = 20.6 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 0.30 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 2.28 
 % Relative Standard Deviation = 20.6 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 0.39 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 20 
 Blind Sample ID = 50185-50187  Mean = 2.37 
 % Relative Standard Deviation = 32.8 
 Number of Observations = 19 
 Blind Sample ID = 50183-50185  Mean = 2.63 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 26 
 Blind Sample ID = 50177-50179  Mean = 0.98 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 46 
 Blind Sample ID = 50175-50DIW  Mean = 3.69 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 2.66 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 28 
 Blind Sample ID = 50173-50DIW  Mean = 1.44 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 4.00 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 2.11 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 0.87 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 15 
 Blind Sample ID = 25211-75209  Mean = 1.04 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 0.15 
 % Relative Standard Deviation = 18.1 
 Number of Observations = 14 
 Blind Sample ID = 25209-75207  Mean = 1.31 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 13 
 Blind Sample ID = 25207-75205  Mean = 0.67 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 11.67 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 1.45 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 4.18 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 3.68 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 22 
 Blind Sample ID = 25201-75197  Mean = 10.10 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 0.10 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 0.41 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 1.10 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 1.71 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 3.88 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 3.70 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 22 
 Blind Sample ID = 25181-75179  Mean = 4.52 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 2.20 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 28 
 Blind Sample ID = 25179-75177  Mean = 1.86 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 35 
 Blind Sample ID = 25177-75175  Mean = 2.15 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Antimony, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01097, MCode: PLM48
Dates: 11/15/07 through 04/30/15
Open Data Set

 Mean = 0.98 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 4 
 Blind Sample ID = 75213-25DIW  Mean = 1.78 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 0.25 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 1.31 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 13 
 Blind Sample ID = 75205-25DIW  Mean = 0.32 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 8 
 Blind Sample ID = 75203-25DIW  Mean = 11.06 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 9 
 Blind Sample ID = 75201-25DIW  Mean = 0.30 
 % Relative Standard Deviation = 30.4 
 Number of Observations = 8 
 Blind Sample ID = 75197-25DIW  Mean = 0.87 
 % Relative Standard Deviation = 32.8 
 Number of Observations = 8 
 Blind Sample ID = 75195-25197  Mean = 1.22 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 16 
 Blind Sample ID = 75193-25DIW  Mean = 1.27 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 8 
 Blind Sample ID = 75193-25197  Mean = 1.39 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 16 
 Blind Sample ID = 75191-25DIW  Mean = 0.26 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 16 
 Blind Sample ID = 75189-25DIW  Mean = 0.65 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 8 
 Blind Sample ID = 75189-25193  Mean = 0.70 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 8 
 Blind Sample ID = 75189-25191  Mean = 0.16 
 % Relative Standard Deviation = 21.5 
 Number of Observations = 8 
 Blind Sample ID = 75187-25DIW  Mean = 0.47 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 8 
 Blind Sample ID = 75185-25DIW  Mean = 3.91 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 8 
 Blind Sample ID = 75183-25DIW  Mean = 1.10 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 8 
 Blind Sample ID = 50187-50191  Mean = 0.31 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 7 
 Blind Sample ID = 50187-50189  Mean = 2.50 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 50187-50183  Mean = 0.43 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 8 
 Blind Sample ID = 50185-50187  Mean = 2.90 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 8 
 Blind Sample ID = 50183-50185  Mean = 2.15 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 0.86 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 1.10 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213  Mean = 0.18 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 3 
 Blind Sample ID = 25209-75207  Mean = 1.32 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 0.68 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 11.72 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 8 
 Blind Sample ID = 25205-75201  Mean = 1.38 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 8 
 Blind Sample ID = 25203-75205  Mean = 4.11 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 0.48 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 8 
 Blind Sample ID = 25195-75197  Mean = 1.09 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 8 
 Blind Sample ID = 25193-75195  Mean = 1.66 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 8 
 Blind Sample ID = 25191-75193
The SGPlot Procedure



- Antimony, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01097, MCode: PLM78
Dates: 05/12/15 through 08/26/22
Open Data Set

 Mean = 2.39 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 0.16 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 2.59 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 0.26 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 0.08 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 23 
 Blind Sample ID = T235  Mean = 1.65 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 0.21 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 21 
 Blind Sample ID = T231  Mean = 3.30 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 21 
 Blind Sample ID = T229  Mean = 2.80 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 24 
 Blind Sample ID = T227  Mean = 1.91 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 23 
 Blind Sample ID = T225  Mean = 4.94 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 23 
 Blind Sample ID = T223  Mean = 1.04 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 22 
 Blind Sample ID = T221  Mean = 1.30 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 23 
 Blind Sample ID = T219  Mean = 0.19 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 18 
 Blind Sample ID = T217  Mean = 1.65 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 16 
 Blind Sample ID = T215  Mean = 2.48 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 16 
 Blind Sample ID = T211  Mean = 0.34 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 1.01 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 14 
 Blind Sample ID = 75213-25DIW  Mean = 1.83 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 2.24 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 3 
 Blind Sample ID = 25213-75211  Mean = 0.91 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 1.18 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Arsenate [as (V)], IC-ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 62453, MCode: PLM36
Dates: 10/29/04 through 10/25/07
Open Data Set

 Mean = 9.21 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 18 
 Blind Sample ID = AS5  Mean = 12.23 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 49 
 Blind Sample ID = AS3
The SGPlot Procedure



- Arsenate [as (V)], IC-ICP-MS (w/org) -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 62453, MCode: PLM35
Dates: 11/16/04 through 10/12/07
Open Data Set

 Mean = 9.15 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 18 
 Blind Sample ID = AS6  Mean = 12.38 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 48 
 Blind Sample ID = AS4
The SGPlot Procedure



- Arsenic, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01000, MCode: GF085
Dates: 10/12/04 through 08/24/05
Open Data Set

 Mean = 3.70 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 8 
 Blind Sample ID = 50175-50DIW  Mean = 4.85 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 12 
 Blind Sample ID = 50175-50173  Mean = 1.16 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 7 
 Blind Sample ID = 50173-50DIW  Mean = 1.50 
 % Relative Standard Deviation = 25.5 
 Number of Observations = 16 
 Blind Sample ID = 50171-50DIW  Mean = 2.98 
 % Relative Standard Deviation = 16.1 
 Number of Observations = 12 
 Blind Sample ID = 50171-50173  Mean = 6.74 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Arsenic, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01000, MCode: PLM40
Dates: 10/13/04 through 10/06/05
Open Data Set

 Mean = 3.67 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 21 
 Blind Sample ID = 50175-50DIW  Mean = 4.99 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 1.34 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 24 
 Blind Sample ID = 50173-50DIW  Mean = 1.72 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 3.07 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 6.40 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Arsenic, FIL, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01000, MCode: PLM10
Dates: 09/09/05 through 09/29/22
Open Data Set

 Mean = 0.45 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 13 
 Blind Sample ID = T243  Mean = 3.85 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 5.41 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 5.75 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 5.05 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 4.31 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 3.22 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 13.41 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 0.31 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 41 
 Blind Sample ID = T227  Mean = 0.79 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 7.66 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 47 
 Blind Sample ID = T223  Mean = 18.35 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 46 
 Blind Sample ID = T221  Mean = 3.64 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 42 
 Blind Sample ID = T219  Mean = 6.27 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 41 
 Blind Sample ID = T217  Mean = 0.47 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 5.25 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 31 
 Blind Sample ID = T211  Mean = 0.24 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 16 
 Blind Sample ID = T209  Mean = 0.74 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 34 
 Blind Sample ID = 75213-25DIW  Mean = 3.75 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 0.17 
 % Relative Standard Deviation = 23.3 
 Number of Observations = 27 
 Blind Sample ID = 75209-25DIW  Mean = 0.62 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 1.35 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 32 
 Blind Sample ID = 75205-25DIW  Mean = 1.25 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 18.78 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 43 
 Blind Sample ID = 75201-25DIW  Mean = 6.50 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 1.06 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 1.55 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 19 
 Blind Sample ID = 75195-25197  Mean = 2.62 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 2.99 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 3.23 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 3.64 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 48 
 Blind Sample ID = 75189-25DIW  Mean = 4.60 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 4.64 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 0.88 
 % Relative Standard Deviation = 15.7 
 Number of Observations = 41 
 Blind Sample ID = 75187-25DIW  Mean = 3.67 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 3.49 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 40 
 Blind Sample ID = 75183-25DIW  Mean = 4.81 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 1.33 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 45 
 Blind Sample ID = 75179-25DIW  Mean = 5.56 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 19 
 Blind Sample ID = 75175-25DIW  Mean = 2.66 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 3.04 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 2.78 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 23 
 Blind Sample ID = 50187-50183  Mean = 3.05 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 19 
 Blind Sample ID = 50185-50187  Mean = 4.74 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 17 
 Blind Sample ID = 50183-50185  Mean = 2.51 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 18 
 Blind Sample ID = 50177-50179  Mean = 3.69 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 23 
 Blind Sample ID = 50175-50DIW  Mean = 1.30 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 6 
 Blind Sample ID = 50173-50DIW  Mean = 3.95 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 1.42 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 16 
 Blind Sample ID = 25211-75209  Mean = 0.79 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 0.71 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 13 
 Blind Sample ID = 25209-75207  Mean = 1.48 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 14 
 Blind Sample ID = 25207-75205  Mean = 0.61 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 19.22 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 1.77 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 7.42 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 7.24 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 22 
 Blind Sample ID = 25201-75197  Mean = 18.69 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 0.50 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 1.46 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 1.95 
 % Relative Standard Deviation = 23.4 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 3.62 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 5.99 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 2.97 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 22 
 Blind Sample ID = 25181-75179  Mean = 3.99 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 2.85 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 20 
 Blind Sample ID = 25179-75177  Mean = 6.33 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 27 
 Blind Sample ID = 25177-75175
The SGPlot Procedure



- Arsenic, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01002, MCode: GF096
Dates: 10/14/04 through 08/31/05
Open Data Set

 Mean = 3.41 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 12 
 Blind Sample ID = 50175-50DIW  Mean = 4.91 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 24 
 Blind Sample ID = 50175-50173  Mean = 1.41 
 % Relative Standard Deviation = 28.1 
 Number of Observations = 17 
 Blind Sample ID = 50173-50DIW  Mean = 1.45 
 % Relative Standard Deviation = 22.6 
 Number of Observations = 23 
 Blind Sample ID = 50171-50DIW  Mean = 2.82 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 24 
 Blind Sample ID = 50171-50173  Mean = 6.51 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 24 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Arsenic, UNF, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01002, MCode: PLM11
Dates: 09/20/05 through 07/26/16
Open Data Set

 Mean = 0.89 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 10 
 Blind Sample ID = 75213-25DIW  Mean = 3.86 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 6 
 Blind Sample ID = 75211-25DIW  Mean = 0.72 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 1.34 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 33 
 Blind Sample ID = 75205-25DIW  Mean = 1.28 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 18.30 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 36 
 Blind Sample ID = 75201-25DIW  Mean = 6.30 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 12 
 Blind Sample ID = 75199-25201  Mean = 1.39 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 46 
 Blind Sample ID = 75197-25DIW  Mean = 1.66 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 2.69 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 3.19 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 3.20 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 46 
 Blind Sample ID = 75191-25DIW  Mean = 3.57 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 48 
 Blind Sample ID = 75189-25DIW  Mean = 4.43 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 19 
 Blind Sample ID = 75189-25193  Mean = 4.67 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 0.93 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 42 
 Blind Sample ID = 75187-25DIW  Mean = 3.85 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 24 
 Blind Sample ID = 75185-25DIW  Mean = 3.47 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 42 
 Blind Sample ID = 75183-25DIW  Mean = 4.63 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 1.33 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 46 
 Blind Sample ID = 75179-25DIW  Mean = 5.57 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 20 
 Blind Sample ID = 75175-25DIW  Mean = 2.75 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 2.95 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 2.95 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 3.14 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 20 
 Blind Sample ID = 50185-50187  Mean = 4.95 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 20 
 Blind Sample ID = 50183-50185  Mean = 2.53 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 20 
 Blind Sample ID = 50177-50179  Mean = 3.65 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 25 
 Blind Sample ID = 50175-50DIW  Mean = 1.43 
 % Relative Standard Deviation = 15.8 
 Number of Observations = 3 
 Blind Sample ID = 50173-50DIW  Mean = 4.12 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 7 
 Blind Sample ID = 25213-75211  Mean = 1.46 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 10 
 Blind Sample ID = 25211-75209  Mean = 0.88 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 6 
 Blind Sample ID = 25209-75213  Mean = 0.73 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 14 
 Blind Sample ID = 25209-75207  Mean = 1.60 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 14 
 Blind Sample ID = 25207-75205  Mean = 0.64 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 18.50 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 1.77 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 7.31 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 7.23 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 15 
 Blind Sample ID = 25201-75197  Mean = 18.20 
 % Relative Standard Deviation = 0.8 
 Number of Observations = 4 
 Blind Sample ID = 25199-75201  Mean = 0.56 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 12 
 Blind Sample ID = 25197-75199  Mean = 1.99 
 % Relative Standard Deviation = 23.0 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 2.10 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 3.74 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 5.77 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 2.95 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 24 
 Blind Sample ID = 25181-75179  Mean = 3.86 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 23 
 Blind Sample ID = 25179-75183  Mean = 2.88 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 20 
 Blind Sample ID = 25179-75177  Mean = 6.43 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 26 
 Blind Sample ID = 25177-75175
The SGPlot Procedure



- Arsenic, UNF, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01002, MCode: PLM77
Dates: 05/12/15 through 08/26/22
Open Data Set

 Mean = 0.47 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 3.92 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 5.24 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 5.73 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 4.82 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 23 
 Blind Sample ID = T235  Mean = 4.18 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 3.18 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 23 
 Blind Sample ID = T231  Mean = 13.39 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 22 
 Blind Sample ID = T229  Mean = 0.30 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 30 
 Blind Sample ID = T227  Mean = 0.83 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 33 
 Blind Sample ID = T225  Mean = 7.70 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 41 
 Blind Sample ID = T223  Mean = 18.57 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 40 
 Blind Sample ID = T221  Mean = 3.73 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 40 
 Blind Sample ID = T219  Mean = 6.36 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 40 
 Blind Sample ID = T217  Mean = 0.51 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 5.38 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 32 
 Blind Sample ID = T211  Mean = 0.28 
 % Relative Standard Deviation = 26.3 
 Number of Observations = 16 
 Blind Sample ID = T209  Mean = 0.84 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 24 
 Blind Sample ID = 75213-25DIW  Mean = 4.05 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 75211-25DIW  Mean = 4.29 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 7 
 Blind Sample ID = 25213-75211  Mean = 1.52 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 6 
 Blind Sample ID = 25211-75209  Mean = 0.91 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 8 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Arsenite [AS (III)], IC-ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 62452, MCode: PLM36
Dates: 10/29/04 through 10/25/07
Open Data Set

 Mean = 9.28 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 18 
 Blind Sample ID = AS5  Mean = 12.37 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 48 
 Blind Sample ID = AS3
The SGPlot Procedure



- Arsenite [AS (III)], IC-ICP-MS (w/org) -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 62452, MCode: PLM35
Dates: 11/16/04 through 10/12/07
Open Data Set

 Mean = 9.22 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 18 
 Blind Sample ID = AS6  Mean = 12.47 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 48 
 Blind Sample ID = AS4
The SGPlot Procedure



- Barium, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01005, MCode: PLM43
Dates: 10/13/04 through 09/29/22
Open Data Set

 Mean = 46.71 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 13 
 Blind Sample ID = T243  Mean = 53.99 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 21.59 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 57.51 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 51.59 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 27.45 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 89.23 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 76.44 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 27.12 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 40 
 Blind Sample ID = T227  Mean = 118.86 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 8.18 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 47 
 Blind Sample ID = T223  Mean = 28.78 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 46 
 Blind Sample ID = T221  Mean = 36.06 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 42 
 Blind Sample ID = T219  Mean = 41.47 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 41 
 Blind Sample ID = T217  Mean = 39.86 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 56.35 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 31 
 Blind Sample ID = T211  Mean = 32.29 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 15 
 Blind Sample ID = T209  Mean = 14.28 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 34 
 Blind Sample ID = 75213-25DIW  Mean = 42.58 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 23.88 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 26 
 Blind Sample ID = 75209-25DIW  Mean = 32.98 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 16.48 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 33 
 Blind Sample ID = 75205-25DIW  Mean = 7.94 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 35.70 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 43 
 Blind Sample ID = 75201-25DIW  Mean = 17.29 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 27.72 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 31.27 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 26.00 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 35.27 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 28.57 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 54.36 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 47 
 Blind Sample ID = 75189-25DIW  Mean = 63.40 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 64.83 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 51.53 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 40 
 Blind Sample ID = 75187-25DIW  Mean = 16.65 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 22.64 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 40 
 Blind Sample ID = 75183-25DIW  Mean = 19.69 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 27.30 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 52 
 Blind Sample ID = 75179-25DIW  Mean = 13.57 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 27 
 Blind Sample ID = 75175-25DIW  Mean = 52.71 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 19 
 Blind Sample ID = 50187-50191  Mean = 69.83 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 49.31 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 44.87 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 19 
 Blind Sample ID = 50185-50187  Mean = 26.17 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 18 
 Blind Sample ID = 50183-50185  Mean = 38.67 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 26 
 Blind Sample ID = 50177-50179  Mean = 8.88 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 46 
 Blind Sample ID = 50175-50DIW  Mean = 29.36 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 20.09 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 28 
 Blind Sample ID = 50173-50DIW  Mean = 6.98 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 27.99 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 45.81 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 38.83 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 16 
 Blind Sample ID = 25211-75209  Mean = 22.54 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 40.65 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 14 
 Blind Sample ID = 25209-75207  Mean = 27.45 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 13 
 Blind Sample ID = 25207-75205  Mean = 29.74 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 41.53 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 19.40 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 19.60 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 40.29 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 23 
 Blind Sample ID = 25201-75197  Mean = 37.26 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 14.84 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 34.34 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 31.00 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 19 
 Blind Sample ID = 25193-75195  Mean = 35.03 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 27.23 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 34.84 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 22 
 Blind Sample ID = 25181-75179  Mean = 31.53 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 39.04 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 28 
 Blind Sample ID = 25179-75177  Mean = 24.06 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 35 
 Blind Sample ID = 25177-75175  Mean = 17.06 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Barium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01005, MCode: PLA11
Dates: 10/09/04 through 09/20/22
Open Data Set

 Mean = 45.97 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 4 
 Blind Sample ID = T243  Mean = 56.23 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 4 
 Blind Sample ID = T241  Mean = 21.72 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 8 
 Blind Sample ID = T239  Mean = 59.17 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 6 
 Blind Sample ID = T237  Mean = 53.32 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 12 
 Blind Sample ID = T235  Mean = 28.52 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 11 
 Blind Sample ID = T233  Mean = 90.06 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 12 
 Blind Sample ID = T231  Mean = 78.12 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 10 
 Blind Sample ID = T229  Mean = 28.32 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 12 
 Blind Sample ID = T227  Mean = 118.08 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 12 
 Blind Sample ID = T225  Mean = 8.64 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 11 
 Blind Sample ID = T223  Mean = 29.96 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 12 
 Blind Sample ID = T221  Mean = 36.55 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 14 
 Blind Sample ID = T219  Mean = 40.92 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 16 
 Blind Sample ID = T217  Mean = 38.94 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 11 
 Blind Sample ID = T215  Mean = 55.63 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 10 
 Blind Sample ID = T211  Mean = 31.71 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 15.32 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 12 
 Blind Sample ID = 75213-25DIW  Mean = 40.43 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 8 
 Blind Sample ID = 75211-25DIW  Mean = 23.17 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 31.74 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 15.92 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 13 
 Blind Sample ID = 75205-25DIW  Mean = 7.42 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 6 
 Blind Sample ID = 75203-25DIW  Mean = 32.44 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 16 
 Blind Sample ID = 75201-25DIW  Mean = 15.87 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 6 
 Blind Sample ID = 75199-25201  Mean = 25.03 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 16 
 Blind Sample ID = 75197-25DIW  Mean = 31.19 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 6 
 Blind Sample ID = 75195-25197  Mean = 25.57 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 16 
 Blind Sample ID = 75193-25DIW  Mean = 34.00 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 8 
 Blind Sample ID = 75193-25197  Mean = 27.77 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 30 
 Blind Sample ID = 75191-25DIW  Mean = 51.74 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 30 
 Blind Sample ID = 75189-25DIW  Mean = 60.95 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 75189-25193  Mean = 59.75 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 6 
 Blind Sample ID = 75189-25191  Mean = 51.68 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 28 
 Blind Sample ID = 75187-25DIW  Mean = 16.69 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 5 
 Blind Sample ID = 75185-25DIW  Mean = 22.91 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 13 
 Blind Sample ID = 75183-25DIW  Mean = 19.49 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 8 
 Blind Sample ID = 75181-25DIW  Mean = 27.01 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 16 
 Blind Sample ID = 75179-25DIW  Mean = 13.78 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = 75175-25DIW  Mean = 52.76 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 24 
 Blind Sample ID = 50187-50191  Mean = 69.13 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 18 
 Blind Sample ID = 50187-50189  Mean = 48.67 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 6 
 Blind Sample ID = 50187-50183  Mean = 44.91 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 50185-50187  Mean = 25.90 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 8 
 Blind Sample ID = 50183-50185  Mean = 38.06 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 8 
 Blind Sample ID = 50177-50179  Mean = 9.11 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 23 
 Blind Sample ID = 50175-50DIW  Mean = 30.28 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 12 
 Blind Sample ID = 50175-50173  Mean = 21.15 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 11 
 Blind Sample ID = 50173-50DIW  Mean = 6.93 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 16 
 Blind Sample ID = 50171-50DIW  Mean = 28.40 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 8 
 Blind Sample ID = 50171-50173  Mean = 44.64 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 8 
 Blind Sample ID = 25213-75211  Mean = 35.65 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 6 
 Blind Sample ID = 25211-75209  Mean = 22.86 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 6 
 Blind Sample ID = 25209-75213  Mean = 39.64 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 26.45 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 28.83 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 36.50 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 6 
 Blind Sample ID = 25205-75201  Mean = 18.61 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 6 
 Blind Sample ID = 25203-75205  Mean = 18.52 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 37.11 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 6 
 Blind Sample ID = 25201-75197  Mean = 34.40 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 8 
 Blind Sample ID = 25199-75201  Mean = 13.95 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 6 
 Blind Sample ID = 25197-75199  Mean = 32.44 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 5 
 Blind Sample ID = 25195-75197  Mean = 30.70 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 6 
 Blind Sample ID = 25193-75195  Mean = 35.40 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 6 
 Blind Sample ID = 25191-75193  Mean = 26.82 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 33.56 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 25181-75179  Mean = 38.86 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = 25179-75177  Mean = 23.57 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 8 
 Blind Sample ID = 25177-75175  Mean = 17.17 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 20 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Barium, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01007, MCode: PLM47
Dates: 11/01/04 through 07/26/16
Open Data Set

 Mean = 16.40 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 4 
 Blind Sample ID = 75213-25DIW  Mean = 43.72 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 24.59 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 33.69 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 16.55 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 13 
 Blind Sample ID = 75205-25DIW  Mean = 7.62 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 8 
 Blind Sample ID = 75203-25DIW  Mean = 34.69 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 16 
 Blind Sample ID = 75201-25DIW  Mean = 17.02 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 8 
 Blind Sample ID = 75199-25201  Mean = 28.29 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 32 
 Blind Sample ID = 75197-25DIW  Mean = 32.46 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 11 
 Blind Sample ID = 75195-25197  Mean = 26.27 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 32 
 Blind Sample ID = 75193-25DIW  Mean = 35.84 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 12 
 Blind Sample ID = 75193-25197  Mean = 28.19 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 24 
 Blind Sample ID = 75191-25DIW  Mean = 54.80 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 20 
 Blind Sample ID = 75189-25DIW  Mean = 63.96 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 12 
 Blind Sample ID = 75189-25193  Mean = 64.79 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 16 
 Blind Sample ID = 75189-25191  Mean = 52.36 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 15 
 Blind Sample ID = 75187-25DIW  Mean = 16.34 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 75185-25DIW  Mean = 22.19 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 15 
 Blind Sample ID = 75183-25DIW  Mean = 19.40 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 75181-25DIW  Mean = 26.18 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 21 
 Blind Sample ID = 75179-25DIW  Mean = 13.19 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 15 
 Blind Sample ID = 75175-25DIW  Mean = 55.39 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = 50187-50191  Mean = 72.82 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 7 
 Blind Sample ID = 50187-50189  Mean = 50.11 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 8 
 Blind Sample ID = 50187-50183  Mean = 45.52 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 8 
 Blind Sample ID = 50185-50187  Mean = 25.78 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = 50183-50185  Mean = 38.07 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 16 
 Blind Sample ID = 50177-50179  Mean = 8.70 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 22 
 Blind Sample ID = 50175-50DIW  Mean = 28.63 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 12 
 Blind Sample ID = 50175-50173  Mean = 20.31 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 13 
 Blind Sample ID = 50173-50DIW  Mean = 6.56 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 8 
 Blind Sample ID = 50171-50DIW  Mean = 26.18 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 12 
 Blind Sample ID = 50171-50173  Mean = 48.57 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 39.69 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 25.31 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213  Mean = 42.19 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 28.21 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 30.30 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 40.62 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 25205-75201  Mean = 18.81 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 25203-75205  Mean = 19.52 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 40.30 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 8 
 Blind Sample ID = 25201-75197  Mean = 14.69 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 8 
 Blind Sample ID = 25197-75199  Mean = 36.37 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 15 
 Blind Sample ID = 25195-75197  Mean = 31.26 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 12 
 Blind Sample ID = 25193-75195  Mean = 36.18 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 12 
 Blind Sample ID = 25191-75193  Mean = 26.25 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 7 
 Blind Sample ID = 25183-75181  Mean = 33.83 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 25181-75179  Mean = 30.33 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 8 
 Blind Sample ID = 25179-75183  Mean = 38.96 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 16 
 Blind Sample ID = 25179-75177  Mean = 22.56 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 16 
 Blind Sample ID = 25177-75175  Mean = 15.89 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 8 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Barium, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01007, MCode: PLM78
Dates: 05/12/15 through 08/26/22
Open Data Set

 Mean = 45.04 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 53.63 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 20.99 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 57.05 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 51.22 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 23 
 Blind Sample ID = T235  Mean = 27.37 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 90.92 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 21 
 Blind Sample ID = T231  Mean = 76.38 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 21 
 Blind Sample ID = T229  Mean = 27.31 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 24 
 Blind Sample ID = T227  Mean = 119.41 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 23 
 Blind Sample ID = T225  Mean = 8.20 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 23 
 Blind Sample ID = T223  Mean = 28.86 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 22 
 Blind Sample ID = T221  Mean = 36.86 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 24 
 Blind Sample ID = T219  Mean = 41.57 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 24 
 Blind Sample ID = T217  Mean = 39.25 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 15 
 Blind Sample ID = T215  Mean = 55.83 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 16 
 Blind Sample ID = T211  Mean = 32.68 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 16.71 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 14 
 Blind Sample ID = 75213-25DIW  Mean = 42.81 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 49.62 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 3 
 Blind Sample ID = 25213-75211  Mean = 39.88 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 25.50 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Barium, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01007, MCode: PLA15
Dates: 10/20/04 through 03/24/15
Open Data Set

 Mean = 39.12 
 % Relative Standard Deviation = 0.8 
 Number of Observations = 3 
 Blind Sample ID = 75211-25DIW  Mean = 22.16 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 10 
 Blind Sample ID = 75209-25DIW  Mean = 30.26 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 15.56 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 14 
 Blind Sample ID = 75205-25DIW  Mean = 7.42 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 6 
 Blind Sample ID = 75203-25DIW  Mean = 29.86 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 10 
 Blind Sample ID = 75201-25DIW  Mean = 24.07 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 7 
 Blind Sample ID = 75197-25DIW  Mean = 28.39 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 6 
 Blind Sample ID = 75195-25197  Mean = 24.11 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 9 
 Blind Sample ID = 75193-25DIW  Mean = 31.63 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 8 
 Blind Sample ID = 75193-25197  Mean = 26.71 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 8 
 Blind Sample ID = 75191-25DIW  Mean = 49.17 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 6 
 Blind Sample ID = 75189-25DIW  Mean = 49.93 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 6 
 Blind Sample ID = 75187-25DIW  Mean = 27.64 
 % Relative Standard Deviation = 0.7 
 Number of Observations = 8 
 Blind Sample ID = 75179-25DIW  Mean = 13.18 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 4 
 Blind Sample ID = 75175-25DIW  Mean = 49.61 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 6 
 Blind Sample ID = 50187-50191  Mean = 67.29 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 8 
 Blind Sample ID = 50187-50189  Mean = 8.93 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 9 
 Blind Sample ID = 50175-50DIW  Mean = 30.61 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 4 
 Blind Sample ID = 50175-50173  Mean = 20.24 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 4 
 Blind Sample ID = 50173-50DIW  Mean = 7.02 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 8 
 Blind Sample ID = 50171-50DIW  Mean = 42.47 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 4 
 Blind Sample ID = 25213-75211  Mean = 36.98 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 25.33 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 27.25 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 34.08 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 6 
 Blind Sample ID = 25205-75201  Mean = 17.93 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 6 
 Blind Sample ID = 25203-75205  Mean = 17.48 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 7 
 Blind Sample ID = 25201-75203  Mean = 31.22 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 5 
 Blind Sample ID = 25195-75197  Mean = 28.67 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 6 
 Blind Sample ID = 25193-75195  Mean = 37.86 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 4 
 Blind Sample ID = 25179-75177  Mean = 23.74 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 4 
 Blind Sample ID = 25177-75175  Mean = 16.21 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 12 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Barium, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01007, MCode: PLO07
Dates: 05/28/15 through 12/03/16
Open Data Set

 Mean = 35.24 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 6 
 Blind Sample ID = T219  Mean = 40.01 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 8 
 Blind Sample ID = T217  Mean = 37.87 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 7 
 Blind Sample ID = T215  Mean = 54.73 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 6 
 Blind Sample ID = T211  Mean = 31.35 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 14.98 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 11 
 Blind Sample ID = 75213-25DIW  Mean = 40.21 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 5 
 Blind Sample ID = 75211-25DIW  Mean = 23.59 
 % Relative Standard Deviation = 1.0 
 Number of Observations = 4 
 Blind Sample ID = 75209-25DIW  Mean = 44.77 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 4 
 Blind Sample ID = 25213-75211  Mean = 36.76 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 22.45 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Beryllium, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01010, MCode: PLM43
Dates: 10/13/04 through 09/29/22
Open Data Set

 Mean = 0.20 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 13 
 Blind Sample ID = T243  Mean = 0.41 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 0.81 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 0.44 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 0.06 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 0.28 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 0.36 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 1.16 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 0.67 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 40 
 Blind Sample ID = T227  Mean = 0.96 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 0.54 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 47 
 Blind Sample ID = T223  Mean = 0.38 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 46 
 Blind Sample ID = T221  Mean = 0.22 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 42 
 Blind Sample ID = T219  Mean = 0.19 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 41 
 Blind Sample ID = T217  Mean = 0.48 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 0.40 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 31 
 Blind Sample ID = T211  Mean = 0.11 
 % Relative Standard Deviation = 22.1 
 Number of Observations = 16 
 Blind Sample ID = T209  Mean = 0.15 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 34 
 Blind Sample ID = 75213-25DIW  Mean = 0.31 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 0.08 
 % Relative Standard Deviation = 22.0 
 Number of Observations = 28 
 Blind Sample ID = 75209-25DIW  Mean = 0.07 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 0.15 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 32 
 Blind Sample ID = 75205-25DIW  Mean = 0.41 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 6.00 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 42 
 Blind Sample ID = 75201-25DIW  Mean = 2.17 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 0.08 
 % Relative Standard Deviation = 17.2 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 0.58 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 19 
 Blind Sample ID = 75195-25197  Mean = 3.42 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 3.41 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 1.36 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 2.78 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 47 
 Blind Sample ID = 75189-25DIW  Mean = 3.81 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 3.07 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 0.13 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 41 
 Blind Sample ID = 75187-25DIW  Mean = 0.30 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 0.60 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 41 
 Blind Sample ID = 75183-25DIW  Mean = 3.48 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 2.82 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 52 
 Blind Sample ID = 75179-25DIW  Mean = 2.14 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 27 
 Blind Sample ID = 75175-25DIW  Mean = 0.93 
 % Relative Standard Deviation = 24.2 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 1.91 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 14 
 Blind Sample ID = 50187-50189  Mean = 0.45 
 % Relative Standard Deviation = 25.2 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 0.27 
 % Relative Standard Deviation = 24.3 
 Number of Observations = 20 
 Blind Sample ID = 50185-50187  Mean = 0.52 
 % Relative Standard Deviation = 35.8 
 Number of Observations = 19 
 Blind Sample ID = 50183-50185  Mean = 2.32 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 26 
 Blind Sample ID = 50177-50179  Mean = 1.44 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 46 
 Blind Sample ID = 50175-50DIW  Mean = 2.57 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 1.08 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 28 
 Blind Sample ID = 50173-50DIW  Mean = 0.57 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 1.58 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 0.35 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 0.19 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 15 
 Blind Sample ID = 25211-75209  Mean = 0.18 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 0.09 
 % Relative Standard Deviation = 23.3 
 Number of Observations = 14 
 Blind Sample ID = 25209-75207  Mean = 0.17 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 13 
 Blind Sample ID = 25207-75205  Mean = 0.13 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 6.16 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 0.28 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 2.49 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 1.98 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 21 
 Blind Sample ID = 25201-75197  Mean = 6.11 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 0.09 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 0.27 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 1.72 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 19 
 Blind Sample ID = 25193-75195  Mean = 3.69 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 3.91 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 4.06 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 22 
 Blind Sample ID = 25181-75179  Mean = 1.61 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 1.66 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 28 
 Blind Sample ID = 25179-75177  Mean = 2.38 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 35 
 Blind Sample ID = 25177-75175  Mean = 2.47 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Beryllium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01010, MCode: PLA11
Dates: 10/15/04 through 09/29/05
Open Data Set

 Mean = 1.55 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 7 
 Blind Sample ID = 50175-50DIW  Mean = 2.58 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 4 
 Blind Sample ID = 50175-50173  Mean = 1.07 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 4 
 Blind Sample ID = 50173-50DIW  Mean = 0.67 
 % Relative Standard Deviation = 47.9 
 Number of Observations = 8 
 Blind Sample ID = 50171-50DIW  Mean = 2.57 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 12 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Beryllium, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01012, MCode: PLM47
Dates: 11/01/04 through 04/30/15
Open Data Set

 Mean = 0.14 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 4 
 Blind Sample ID = 75213-25DIW  Mean = 0.28 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 0.08 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 0.06 
 % Relative Standard Deviation = 15.6 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 0.14 
 % Relative Standard Deviation = 17.7 
 Number of Observations = 13 
 Blind Sample ID = 75205-25DIW  Mean = 0.39 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 8 
 Blind Sample ID = 75203-25DIW  Mean = 5.94 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 16 
 Blind Sample ID = 75201-25DIW  Mean = 2.08 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 8 
 Blind Sample ID = 75199-25201  Mean = 0.09 
 % Relative Standard Deviation = 36.7 
 Number of Observations = 24 
 Blind Sample ID = 75197-25DIW  Mean = 0.56 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 8 
 Blind Sample ID = 75195-25197  Mean = 3.41 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 16 
 Blind Sample ID = 75193-25DIW  Mean = 3.43 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 8 
 Blind Sample ID = 75193-25197  Mean = 1.33 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 22 
 Blind Sample ID = 75191-25DIW  Mean = 2.68 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 28 
 Blind Sample ID = 75189-25DIW  Mean = 3.69 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 8 
 Blind Sample ID = 75189-25193  Mean = 3.01 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 8 
 Blind Sample ID = 75189-25191  Mean = 0.13 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 19 
 Blind Sample ID = 75187-25DIW  Mean = 0.29 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 8 
 Blind Sample ID = 75185-25DIW  Mean = 0.58 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 15 
 Blind Sample ID = 75183-25DIW  Mean = 3.24 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 8 
 Blind Sample ID = 75181-25DIW  Mean = 2.59 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 21 
 Blind Sample ID = 75179-25DIW  Mean = 2.09 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 15 
 Blind Sample ID = 75175-25DIW  Mean = 0.99 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 12 
 Blind Sample ID = 50187-50191  Mean = 1.93 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 7 
 Blind Sample ID = 50187-50189  Mean = 0.49 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 8 
 Blind Sample ID = 50187-50183  Mean = 0.28 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 8 
 Blind Sample ID = 50185-50187  Mean = 0.56 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 8 
 Blind Sample ID = 50183-50185  Mean = 2.18 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 16 
 Blind Sample ID = 50177-50179  Mean = 1.41 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 22 
 Blind Sample ID = 50175-50DIW  Mean = 2.53 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 12 
 Blind Sample ID = 50175-50173  Mean = 0.96 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 13 
 Blind Sample ID = 50173-50DIW  Mean = 0.56 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 8 
 Blind Sample ID = 50171-50DIW  Mean = 1.57 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 12 
 Blind Sample ID = 50171-50173  Mean = 0.34 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 0.18 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 0.18 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213  Mean = 0.09 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 0.16 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 0.13 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 6.10 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 8 
 Blind Sample ID = 25205-75201  Mean = 0.25 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 8 
 Blind Sample ID = 25203-75205  Mean = 2.42 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 1.90 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 8 
 Blind Sample ID = 25201-75197  Mean = 0.09 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 8 
 Blind Sample ID = 25197-75199  Mean = 0.26 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 8 
 Blind Sample ID = 25195-75197  Mean = 1.75 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 8 
 Blind Sample ID = 25193-75195  Mean = 3.72 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 25191-75193  Mean = 3.44 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 7 
 Blind Sample ID = 25183-75181  Mean = 3.81 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 8 
 Blind Sample ID = 25181-75179  Mean = 1.43 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 8 
 Blind Sample ID = 25179-75183  Mean = 1.55 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 16 
 Blind Sample ID = 25179-75177  Mean = 2.45 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 16 
 Blind Sample ID = 25177-75175  Mean = 2.34 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 8 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Beryllium, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01012, MCode: PLM78
Dates: 05/12/15 through 08/26/22
Open Data Set

 Mean = 0.20 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 0.39 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 0.75 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 0.41 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 0.05 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 23 
 Blind Sample ID = T235  Mean = 0.27 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 0.35 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 21 
 Blind Sample ID = T231  Mean = 1.15 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 21 
 Blind Sample ID = T229  Mean = 0.65 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 24 
 Blind Sample ID = T227  Mean = 1.03 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 23 
 Blind Sample ID = T225  Mean = 0.55 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 23 
 Blind Sample ID = T223  Mean = 0.37 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 22 
 Blind Sample ID = T221  Mean = 0.22 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 24 
 Blind Sample ID = T219  Mean = 0.19 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 24 
 Blind Sample ID = T217  Mean = 0.47 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 16 
 Blind Sample ID = T215  Mean = 0.38 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 16 
 Blind Sample ID = T211  Mean = 0.10 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 0.14 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 14 
 Blind Sample ID = 75213-25DIW  Mean = 0.28 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 0.31 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 3 
 Blind Sample ID = 25213-75211  Mean = 0.18 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 0.17 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Beryllium, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01012, MCode: PLA15
Dates: 12/01/08 through 11/12/09
Open Data Set

 Mean = 1.39 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 8 
 Blind Sample ID = 75191-25DIW  Mean = 2.60 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 6 
 Blind Sample ID = 75189-25DIW  Mean = 0.20 
 % Relative Standard Deviation = 42.5 
 Number of Observations = 4 
 Blind Sample ID = 75187-25DIW  Mean = 0.88 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 6 
 Blind Sample ID = 50187-50191  Mean = 1.81 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 8 
 Blind Sample ID = 50187-50189
The SGPlot Procedure



- Boron, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01020, MCode: PLM40
Dates: 10/13/04 through 09/29/22
Open Data Set

 Mean = 321.51 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 10 
 Blind Sample ID = T243  Mean = 8.84 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 259.69 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 11.46 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 21.65 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 21.96 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 26.59 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 112.18 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 184.42 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 13.32 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 47 
 Blind Sample ID = T223  Mean = 19.00 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 46 
 Blind Sample ID = T221  Mean = 10.82 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 42 
 Blind Sample ID = T219  Mean = 11.30 
 % Relative Standard Deviation = 15.0 
 Number of Observations = 42 
 Blind Sample ID = T217  Mean = 16.90 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 5.27 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 7 
 Blind Sample ID = T211  Mean = 37.25 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 15 
 Blind Sample ID = T209  Mean = 9.73 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 34 
 Blind Sample ID = 75213-25DIW  Mean = 26.72 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 26 
 Blind Sample ID = 75209-25DIW  Mean = 10.14 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 5.31 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 32 
 Blind Sample ID = 75205-25DIW  Mean = 3.35 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 32.67 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 44 
 Blind Sample ID = 75201-25DIW  Mean = 25.03 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 26.78 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 11.17 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 32.40 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 41.28 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 33.75 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 16.79 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 48 
 Blind Sample ID = 75189-25DIW  Mean = 26.68 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 26.78 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 29.05 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 40 
 Blind Sample ID = 75187-25DIW  Mean = 30.28 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 43.85 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 40 
 Blind Sample ID = 75183-25DIW  Mean = 15.14 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 21.08 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 52 
 Blind Sample ID = 75179-25DIW  Mean = 35.55 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 27 
 Blind Sample ID = 75175-25DIW  Mean = 43.24 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 19 
 Blind Sample ID = 50187-50191  Mean = 28.91 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 44.54 
 % Relative Standard Deviation = 17.7 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 38.59 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 19 
 Blind Sample ID = 50185-50187  Mean = 46.29 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 18 
 Blind Sample ID = 50183-50185  Mean = 57.45 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 25 
 Blind Sample ID = 50177-50179  Mean = 24.48 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 46 
 Blind Sample ID = 50175-50DIW  Mean = 101.47 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 82.63 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 27 
 Blind Sample ID = 50173-50DIW  Mean = 13.17 
 % Relative Standard Deviation = 16.4 
 Number of Observations = 23 
 Blind Sample ID = 50171-50DIW  Mean = 90.76 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 6.55 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 28.19 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 15 
 Blind Sample ID = 25211-75209  Mean = 18.53 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 19.43 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 14 
 Blind Sample ID = 25209-75207  Mean = 8.90 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 13 
 Blind Sample ID = 25207-75205  Mean = 27.66 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 35.46 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 6.41 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 14.25 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 15 
 Blind Sample ID = 25201-75203  Mean = 37.41 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 23 
 Blind Sample ID = 25201-75197  Mean = 38.16 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 22.75 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 27.25 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 12.05 
 % Relative Standard Deviation = 18.6 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 42.85 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 32.77 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 27.01 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 22 
 Blind Sample ID = 25181-75179  Mean = 51.53 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 71.59 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 28 
 Blind Sample ID = 25179-75177  Mean = 55.75 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 35 
 Blind Sample ID = 25177-75175  Mean = 41.21 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Boron, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01020, MCode: PLA13
Dates: 10/09/04 through 09/28/22
Open Data Set

 Mean = 294.09 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = T243  Mean = 9.98 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 12 
 Blind Sample ID = T241  Mean = 236.68 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 23 
 Blind Sample ID = T239  Mean = 12.19 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 20 
 Blind Sample ID = T237  Mean = 22.96 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 33 
 Blind Sample ID = T235  Mean = 23.15 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 27 
 Blind Sample ID = T233  Mean = 27.16 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 29 
 Blind Sample ID = T231  Mean = 126.37 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 33 
 Blind Sample ID = T229  Mean = 4.41 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 34 
 Blind Sample ID = T227  Mean = 203.71 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 31 
 Blind Sample ID = T225  Mean = 13.82 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 34 
 Blind Sample ID = T223  Mean = 20.37 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 30 
 Blind Sample ID = T221  Mean = 11.48 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 24 
 Blind Sample ID = T219  Mean = 12.51 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 30 
 Blind Sample ID = T217  Mean = 16.56 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 16 
 Blind Sample ID = T215  Mean = 5.17 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 12 
 Blind Sample ID = T211  Mean = 37.71 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 7 
 Blind Sample ID = T209  Mean = 10.93 
 % Relative Standard Deviation = 16.1 
 Number of Observations = 20 
 Blind Sample ID = 75213-25DIW  Mean = 3.69 
 % Relative Standard Deviation = 20.8 
 Number of Observations = 16 
 Blind Sample ID = 75211-25DIW  Mean = 27.87 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 27 
 Blind Sample ID = 75209-25DIW  Mean = 11.13 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 5.46 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 30 
 Blind Sample ID = 75205-25DIW  Mean = 3.27 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 12 
 Blind Sample ID = 75203-25DIW  Mean = 35.03 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 37 
 Blind Sample ID = 75201-25DIW  Mean = 24.85 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 18 
 Blind Sample ID = 75199-25201  Mean = 29.40 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 32 
 Blind Sample ID = 75197-25DIW  Mean = 13.33 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 16 
 Blind Sample ID = 75195-25197  Mean = 33.16 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 31 
 Blind Sample ID = 75193-25DIW  Mean = 43.17 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 18 
 Blind Sample ID = 75193-25197  Mean = 36.41 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 30 
 Blind Sample ID = 75191-25DIW  Mean = 18.27 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 32 
 Blind Sample ID = 75189-25DIW  Mean = 29.19 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 18 
 Blind Sample ID = 75189-25193  Mean = 28.27 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 14 
 Blind Sample ID = 75189-25191  Mean = 32.24 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 30 
 Blind Sample ID = 75187-25DIW  Mean = 33.61 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 13 
 Blind Sample ID = 75185-25DIW  Mean = 46.62 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 29 
 Blind Sample ID = 75183-25DIW  Mean = 16.54 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 11 
 Blind Sample ID = 75181-25DIW  Mean = 22.03 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 36 
 Blind Sample ID = 75179-25DIW  Mean = 37.30 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 20 
 Blind Sample ID = 75175-25DIW  Mean = 47.52 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 16 
 Blind Sample ID = 50187-50191  Mean = 32.79 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 18 
 Blind Sample ID = 50187-50189  Mean = 51.35 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 15 
 Blind Sample ID = 50187-50183  Mean = 42.15 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 16 
 Blind Sample ID = 50185-50187  Mean = 51.74 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 18 
 Blind Sample ID = 50183-50185  Mean = 59.48 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 16 
 Blind Sample ID = 50177-50179  Mean = 23.88 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 43 
 Blind Sample ID = 50175-50DIW  Mean = 102.87 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 19 
 Blind Sample ID = 50175-50173  Mean = 78.87 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 19 
 Blind Sample ID = 50173-50DIW  Mean = 12.89 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 90.62 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 16 
 Blind Sample ID = 50171-50173  Mean = 7.63 
 % Relative Standard Deviation = 14.2 
 Number of Observations = 16 
 Blind Sample ID = 25213-75211  Mean = 28.87 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 14 
 Blind Sample ID = 25211-75209  Mean = 20.67 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 19.56 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 16 
 Blind Sample ID = 25209-75207  Mean = 9.43 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 14 
 Blind Sample ID = 25207-75205  Mean = 29.64 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 36.23 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 14 
 Blind Sample ID = 25205-75201  Mean = 7.21 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 12 
 Blind Sample ID = 25203-75205  Mean = 15.11 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 14 
 Blind Sample ID = 25201-75203  Mean = 41.32 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 18 
 Blind Sample ID = 25201-75197  Mean = 39.74 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 20 
 Blind Sample ID = 25199-75201  Mean = 23.38 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 18 
 Blind Sample ID = 25197-75199  Mean = 29.66 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 13 
 Blind Sample ID = 25195-75197  Mean = 14.36 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 16 
 Blind Sample ID = 25193-75195  Mean = 46.07 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 16 
 Blind Sample ID = 25191-75193  Mean = 33.43 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 23 
 Blind Sample ID = 25183-75181  Mean = 26.52 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 18 
 Blind Sample ID = 25181-75179  Mean = 52.62 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 8 
 Blind Sample ID = 25179-75183  Mean = 72.78 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 20 
 Blind Sample ID = 25179-75177  Mean = 58.44 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 20 
 Blind Sample ID = 25177-75175  Mean = 43.01 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 28 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Boron, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01022, MCode: PLM47
Dates: 10/26/05 through 04/30/15
Open Data Set

 Mean = 9.97 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 4 
 Blind Sample ID = 75213-25DIW  Mean = 26.19 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 9.92 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 5.51 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 6 
 Blind Sample ID = 75205-25DIW  Mean = 32.26 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 16 
 Blind Sample ID = 75201-25DIW  Mean = 23.82 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 8 
 Blind Sample ID = 75199-25201  Mean = 27.68 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 23 
 Blind Sample ID = 75197-25DIW  Mean = 13.08 
 % Relative Standard Deviation = 31.4 
 Number of Observations = 8 
 Blind Sample ID = 75195-25197  Mean = 32.59 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 16 
 Blind Sample ID = 75193-25DIW  Mean = 43.77 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 8 
 Blind Sample ID = 75193-25197  Mean = 34.33 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 16 
 Blind Sample ID = 75191-25DIW  Mean = 16.64 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 16 
 Blind Sample ID = 75189-25DIW  Mean = 26.75 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 8 
 Blind Sample ID = 75189-25193  Mean = 29.18 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 8 
 Blind Sample ID = 75189-25191  Mean = 29.89 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 15 
 Blind Sample ID = 75187-25DIW  Mean = 31.91 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 8 
 Blind Sample ID = 75185-25DIW  Mean = 46.31 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 15 
 Blind Sample ID = 75183-25DIW  Mean = 15.78 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 8 
 Blind Sample ID = 75181-25DIW  Mean = 20.96 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 21 
 Blind Sample ID = 75179-25DIW  Mean = 34.86 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 15 
 Blind Sample ID = 75175-25DIW  Mean = 44.95 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 8 
 Blind Sample ID = 50187-50191  Mean = 30.02 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 7 
 Blind Sample ID = 50187-50189  Mean = 49.84 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 8 
 Blind Sample ID = 50187-50183  Mean = 41.31 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 8 
 Blind Sample ID = 50185-50187  Mean = 54.41 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 8 
 Blind Sample ID = 50183-50185  Mean = 59.04 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 16 
 Blind Sample ID = 50177-50179  Mean = 24.55 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 15 
 Blind Sample ID = 50175-50DIW  Mean = 7.51 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 28.98 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 19.93 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213  Mean = 18.97 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 9.09 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 29.64 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 35.76 
 % Relative Standard Deviation = 11.3 
 Number of Observations = 8 
 Blind Sample ID = 25205-75201  Mean = 12.73 
 % Relative Standard Deviation = 23.9 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 36.74 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 8 
 Blind Sample ID = 25201-75197  Mean = 22.56 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 8 
 Blind Sample ID = 25197-75199  Mean = 28.55 
 % Relative Standard Deviation = 13.7 
 Number of Observations = 8 
 Blind Sample ID = 25195-75197  Mean = 13.27 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 8 
 Blind Sample ID = 25193-75195  Mean = 44.11 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 8 
 Blind Sample ID = 25191-75193  Mean = 32.47 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 7 
 Blind Sample ID = 25183-75181  Mean = 26.32 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 8 
 Blind Sample ID = 25181-75179  Mean = 53.02 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 8 
 Blind Sample ID = 25179-75183  Mean = 71.04 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 16 
 Blind Sample ID = 25179-75177  Mean = 58.23 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 16 
 Blind Sample ID = 25177-75175
The SGPlot Procedure



- Boron, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01022, MCode: PLM78
Dates: 05/12/15 through 08/26/22
Open Data Set

 Mean = 304.36 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 8.89 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 234.96 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 11.23 
 % Relative Standard Deviation = 15.7 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 21.47 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 23 
 Blind Sample ID = T235  Mean = 20.68 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 25.95 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 21 
 Blind Sample ID = T231  Mean = 115.63 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 21 
 Blind Sample ID = T229  Mean = 207.22 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 23 
 Blind Sample ID = T225  Mean = 13.77 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 23 
 Blind Sample ID = T223  Mean = 18.75 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 22 
 Blind Sample ID = T221  Mean = 10.27 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 24 
 Blind Sample ID = T219  Mean = 11.51 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 24 
 Blind Sample ID = T217  Mean = 16.30 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 16 
 Blind Sample ID = T215  Mean = 5.22 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 3 
 Blind Sample ID = T211  Mean = 34.46 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 9.41 
 % Relative Standard Deviation = 16.5 
 Number of Observations = 14 
 Blind Sample ID = 75213-25DIW  Mean = 6.67 
 % Relative Standard Deviation = 43.3 
 Number of Observations = 3 
 Blind Sample ID = 25213-75211  Mean = 25.78 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 17.83 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Boron, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01022, MCode: PLA15
Dates: 11/02/12 through 02/10/14
Open Data Set

 Mean = 5.00 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 8 
 Blind Sample ID = 75205-25DIW  Mean = 2.84 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 6 
 Blind Sample ID = 75203-25DIW  Mean = 32.79 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 10 
 Blind Sample ID = 75201-25DIW  Mean = 33.46 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 6 
 Blind Sample ID = 25205-75201  Mean = 6.75 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 6 
 Blind Sample ID = 25203-75205  Mean = 13.79 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203
The SGPlot Procedure



- Cadmium, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01025, MCode: PLM43
Dates: 10/13/04 through 09/21/22
Open Data Set

 Mean = 1.54 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 13 
 Blind Sample ID = T243  Mean = 0.46 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 6.99 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 0.49 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 0.03 
 % Relative Standard Deviation = 16.0 
 Number of Observations = 14 
 Blind Sample ID = T235  Mean = 2.82 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 0.41 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 1.91 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 0.48 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 40 
 Blind Sample ID = T227  Mean = 0.98 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 3.86 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 47 
 Blind Sample ID = T223  Mean = 0.04 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 46 
 Blind Sample ID = T221  Mean = 0.62 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 42 
 Blind Sample ID = T219  Mean = 0.81 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 41 
 Blind Sample ID = T217  Mean = 3.91 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 1.44 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 30 
 Blind Sample ID = T211  Mean = 0.37 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 34 
 Blind Sample ID = 75213-25DIW  Mean = 1.10 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 0.47 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 0.91 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 32 
 Blind Sample ID = 75205-25DIW  Mean = 0.68 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 12.71 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 43 
 Blind Sample ID = 75201-25DIW  Mean = 5.51 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 2.49 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 0.95 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 1.76 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 2.55 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 0.27 
 % Relative Standard Deviation = 27.7 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 1.23 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 47 
 Blind Sample ID = 75189-25DIW  Mean = 1.86 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 1.33 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 0.10 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 41 
 Blind Sample ID = 75187-25DIW  Mean = 0.04 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 4.14 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 41 
 Blind Sample ID = 75183-25DIW  Mean = 1.33 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 3.45 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 52 
 Blind Sample ID = 75179-25DIW  Mean = 6.40 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 27 
 Blind Sample ID = 75175-25DIW  Mean = 0.21 
 % Relative Standard Deviation = 21.7 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 0.88 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 14 
 Blind Sample ID = 50187-50189  Mean = 2.74 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 23 
 Blind Sample ID = 50187-50183  Mean = 0.09 
 % Relative Standard Deviation = 15.8 
 Number of Observations = 20 
 Blind Sample ID = 50185-50187  Mean = 2.76 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 17 
 Blind Sample ID = 50183-50185  Mean = 3.52 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 26 
 Blind Sample ID = 50177-50179  Mean = 4.27 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 46 
 Blind Sample ID = 50175-50DIW  Mean = 5.04 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 0.67 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 28 
 Blind Sample ID = 50173-50DIW  Mean = 2.56 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 3.24 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 1.27 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 0.39 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 15 
 Blind Sample ID = 25211-75209  Mean = 0.38 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 0.46 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 13 
 Blind Sample ID = 25209-75207  Mean = 1.07 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 13 
 Blind Sample ID = 25207-75205  Mean = 0.32 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 12.80 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 1.16 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 4.84 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 6.75 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 22 
 Blind Sample ID = 25201-75197  Mean = 13.10 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 2.04 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 2.45 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 0.72 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 19 
 Blind Sample ID = 25193-75195  Mean = 1.88 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 2.67 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 3.80 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 21 
 Blind Sample ID = 25181-75179  Mean = 5.37 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 3.05 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 28 
 Blind Sample ID = 25179-75177  Mean = 7.03 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 35 
 Blind Sample ID = 25177-75175  Mean = 7.59 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Cadmium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01025, MCode: PLA11
Dates: 03/03/05 through 08/01/05
Open Data Set

 Mean = 4.28 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 4 
 Blind Sample ID = 50175-50DIW  Mean = 4.56 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 4 
 Blind Sample ID = 50175-50173  Mean = 2.83 
 % Relative Standard Deviation = 38.4 
 Number of Observations = 4 
 Blind Sample ID = 50171-50DIW  Mean = 7.70 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 8 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Cadmium, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01027, MCode: GF097
Dates: 10/20/04 through 08/18/05
Open Data Set

 Mean = 4.16 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 8 
 Blind Sample ID = 50175-50DIW  Mean = 4.69 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 11 
 Blind Sample ID = 50175-50173  Mean = 0.65 
 % Relative Standard Deviation = 15.8 
 Number of Observations = 6 
 Blind Sample ID = 50173-50DIW  Mean = 2.50 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 16 
 Blind Sample ID = 50171-50DIW  Mean = 3.23 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 12 
 Blind Sample ID = 50171-50173  Mean = 7.33 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 12 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Cadmium, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01027, MCode: PLM47
Dates: 11/01/04 through 04/30/15
Open Data Set

 Mean = 0.32 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 7 
 Blind Sample ID = 75213-25DIW  Mean = 1.04 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 0.43 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 0.87 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 33 
 Blind Sample ID = 75205-25DIW  Mean = 0.63 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 11.19 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 36 
 Blind Sample ID = 75201-25DIW  Mean = 4.95 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 12 
 Blind Sample ID = 75199-25201  Mean = 2.25 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 48 
 Blind Sample ID = 75197-25DIW  Mean = 0.89 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 1.65 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 2.40 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 0.21 
 % Relative Standard Deviation = 31.0 
 Number of Observations = 46 
 Blind Sample ID = 75191-25DIW  Mean = 1.13 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 48 
 Blind Sample ID = 75189-25DIW  Mean = 1.61 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 19 
 Blind Sample ID = 75189-25193  Mean = 1.18 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 0.10 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 40 
 Blind Sample ID = 75187-25DIW  Mean = 0.04 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 4.01 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 41 
 Blind Sample ID = 75183-25DIW  Mean = 1.22 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 3.29 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 51 
 Blind Sample ID = 75179-25DIW  Mean = 6.17 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 27 
 Blind Sample ID = 75175-25DIW  Mean = 0.20 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 0.85 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 2.74 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 0.09 
 % Relative Standard Deviation = 14.5 
 Number of Observations = 20 
 Blind Sample ID = 50185-50187  Mean = 2.67 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 18 
 Blind Sample ID = 50183-50185  Mean = 3.48 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 26 
 Blind Sample ID = 50177-50179  Mean = 4.14 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 36 
 Blind Sample ID = 50175-50DIW  Mean = 4.82 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 19 
 Blind Sample ID = 50175-50173  Mean = 0.65 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 26 
 Blind Sample ID = 50173-50DIW  Mean = 2.45 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 12 
 Blind Sample ID = 50171-50DIW  Mean = 3.13 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 16 
 Blind Sample ID = 50171-50173  Mean = 1.17 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 0.36 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 6 
 Blind Sample ID = 25211-75209  Mean = 0.34 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213  Mean = 0.44 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 14 
 Blind Sample ID = 25209-75207  Mean = 1.02 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 14 
 Blind Sample ID = 25207-75205  Mean = 0.30 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 11.37 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 1.08 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 4.40 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 5.89 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 15 
 Blind Sample ID = 25201-75197  Mean = 11.56 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 4 
 Blind Sample ID = 25199-75201  Mean = 1.84 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 12 
 Blind Sample ID = 25197-75199  Mean = 2.29 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 0.69 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 1.69 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 2.53 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 3.66 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 23 
 Blind Sample ID = 25181-75179  Mean = 5.07 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 3.03 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 28 
 Blind Sample ID = 25179-75177  Mean = 6.86 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 34 
 Blind Sample ID = 25177-75175  Mean = 7.46 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 20 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Cadmium, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01027, MCode: PLM78
Dates: 05/12/15 through 08/19/22
Open Data Set

 Mean = 1.56 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 0.47 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 7.10 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 0.48 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 0.03 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 6 
 Blind Sample ID = T235  Mean = 2.84 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 0.42 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 23 
 Blind Sample ID = T231  Mean = 1.91 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 22 
 Blind Sample ID = T229  Mean = 0.48 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 28 
 Blind Sample ID = T227  Mean = 0.97 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 31 
 Blind Sample ID = T225  Mean = 3.88 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 33 
 Blind Sample ID = T223  Mean = 0.04 
 % Relative Standard Deviation = 25.3 
 Number of Observations = 34 
 Blind Sample ID = T221  Mean = 0.62 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 30 
 Blind Sample ID = T219  Mean = 0.82 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 30 
 Blind Sample ID = T217  Mean = 3.87 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 20 
 Blind Sample ID = T215  Mean = 1.45 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 24 
 Blind Sample ID = T211  Mean = 0.32 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 19 
 Blind Sample ID = 75213-25DIW  Mean = 1.06 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 6 
 Blind Sample ID = 75211-25DIW  Mean = 1.22 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 0.37 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 6 
 Blind Sample ID = 25211-75209  Mean = 0.32 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 6 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Chromium, FIL, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: GF075
Dates: 10/08/04 through 09/07/05
Open Data Set

 Mean = 1.13 
 % Relative Standard Deviation = 18.7 
 Number of Observations = 19 
 Blind Sample ID = 50175-50DIW  Mean = 3.95 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 2.73 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 21 
 Blind Sample ID = 50173-50DIW  Mean = 1.68 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 23 
 Blind Sample ID = 50171-50DIW  Mean = 4.15 
 % Relative Standard Deviation = 20.2 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 2.53 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Chromium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: PLA11
Dates: 10/09/04 through 07/08/14
Open Data Set

 Mean = 0.77 
 % Relative Standard Deviation = 30.9 
 Number of Observations = 6 
 Blind Sample ID = 75205-25DIW  Mean = 1.42 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 7 
 Blind Sample ID = 75197-25DIW  Mean = 1.30 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 6 
 Blind Sample ID = 75195-25197  Mean = 3.14 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 16 
 Blind Sample ID = 75193-25DIW  Mean = 3.42 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 8 
 Blind Sample ID = 75193-25197  Mean = 2.72 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 16 
 Blind Sample ID = 75191-25DIW  Mean = 2.23 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 12 
 Blind Sample ID = 75189-25DIW  Mean = 3.50 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 8 
 Blind Sample ID = 75189-25193  Mean = 3.35 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 6 
 Blind Sample ID = 75189-25191  Mean = 0.68 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 5 
 Blind Sample ID = 75187-25DIW  Mean = 1.71 
 % Relative Standard Deviation = 24.6 
 Number of Observations = 13 
 Blind Sample ID = 75183-25DIW  Mean = 4.10 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 8 
 Blind Sample ID = 75181-25DIW  Mean = 3.14 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 16 
 Blind Sample ID = 75179-25DIW  Mean = 1.48 
 % Relative Standard Deviation = 21.6 
 Number of Observations = 8 
 Blind Sample ID = 75175-25DIW  Mean = 2.04 
 % Relative Standard Deviation = 23.4 
 Number of Observations = 6 
 Blind Sample ID = 50187-50191  Mean = 1.88 
 % Relative Standard Deviation = 19.5 
 Number of Observations = 8 
 Blind Sample ID = 50187-50189  Mean = 1.44 
 % Relative Standard Deviation = 16.8 
 Number of Observations = 6 
 Blind Sample ID = 50187-50183  Mean = 0.68 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 3 
 Blind Sample ID = 50185-50187  Mean = 1.42 
 % Relative Standard Deviation = 32.2 
 Number of Observations = 8 
 Blind Sample ID = 50183-50185  Mean = 6.72 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 8 
 Blind Sample ID = 50177-50179  Mean = 1.33 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 8 
 Blind Sample ID = 50175-50DIW  Mean = 4.41 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 8 
 Blind Sample ID = 50175-50173  Mean = 3.27 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 8 
 Blind Sample ID = 50173-50DIW  Mean = 1.80 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 7 
 Blind Sample ID = 50171-50DIW  Mean = 5.15 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 4 
 Blind Sample ID = 50171-50173  Mean = 0.75 
 % Relative Standard Deviation = 19.6 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 1.76 
 % Relative Standard Deviation = 16.7 
 Number of Observations = 5 
 Blind Sample ID = 25195-75197  Mean = 1.79 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 6 
 Blind Sample ID = 25193-75195  Mean = 4.03 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 6 
 Blind Sample ID = 25191-75193  Mean = 4.86 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 4.46 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 8 
 Blind Sample ID = 25181-75179  Mean = 7.80 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 8 
 Blind Sample ID = 25179-75177  Mean = 3.66 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 8 
 Blind Sample ID = 25177-75175  Mean = 2.63 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 12 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Chromium, FIL, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01030, MCode: PLM10
Dates: 09/16/05 through 09/29/22
Open Data Set

 Mean = 0.93 
 % Relative Standard Deviation = 28.2 
 Number of Observations = 13 
 Blind Sample ID = T243  Mean = 2.98 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 25 
 Blind Sample ID = T239  Mean = 2.81 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 1.92 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 1.88 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 0.67 
 % Relative Standard Deviation = 21.2 
 Number of Observations = 4 
 Blind Sample ID = T231  Mean = 7.65 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 0.60 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 16 
 Blind Sample ID = T227  Mean = 1.39 
 % Relative Standard Deviation = 19.3 
 Number of Observations = 41 
 Blind Sample ID = T225  Mean = 0.61 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 47 
 Blind Sample ID = T223  Mean = 1.80 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 45 
 Blind Sample ID = T221  Mean = 0.73 
 % Relative Standard Deviation = 33.0 
 Number of Observations = 29 
 Blind Sample ID = T219  Mean = 1.53 
 % Relative Standard Deviation = 11.5 
 Number of Observations = 40 
 Blind Sample ID = T217  Mean = 3.00 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 27 
 Blind Sample ID = T215  Mean = 2.81 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 31 
 Blind Sample ID = T211  Mean = 4.52 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 34 
 Blind Sample ID = 75213-25DIW  Mean = 1.94 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 0.33 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 6 
 Blind Sample ID = 75207-25DIW  Mean = 0.85 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 32 
 Blind Sample ID = 75205-25DIW  Mean = 0.72 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 25.12 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 44 
 Blind Sample ID = 75201-25DIW  Mean = 9.57 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 0.98 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 1.15 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 19 
 Blind Sample ID = 75195-25197  Mean = 2.96 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 3.17 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 2.82 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 2.48 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 48 
 Blind Sample ID = 75189-25DIW  Mean = 3.44 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 3.36 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 0.56 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 41 
 Blind Sample ID = 75187-25DIW  Mean = 0.83 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 1.64 
 % Relative Standard Deviation = 15.8 
 Number of Observations = 41 
 Blind Sample ID = 75183-25DIW  Mean = 4.21 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 3.17 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 45 
 Blind Sample ID = 75179-25DIW  Mean = 1.48 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 19 
 Blind Sample ID = 75175-25DIW  Mean = 2.19 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 1.92 
 % Relative Standard Deviation = 25.6 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 1.42 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 0.89 
 % Relative Standard Deviation = 21.6 
 Number of Observations = 20 
 Blind Sample ID = 50185-50187  Mean = 1.49 
 % Relative Standard Deviation = 30.5 
 Number of Observations = 19 
 Blind Sample ID = 50183-50185  Mean = 6.19 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 18 
 Blind Sample ID = 50177-50179  Mean = 1.00 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 19 
 Blind Sample ID = 50175-50DIW  Mean = 2.32 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 7 
 Blind Sample ID = 50173-50DIW  Mean = 3.49 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 0.77 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 15 
 Blind Sample ID = 25211-75209  Mean = 4.62 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 0.35 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 13 
 Blind Sample ID = 25209-75207  Mean = 0.99 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 13 
 Blind Sample ID = 25207-75205  Mean = 0.39 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 25.45 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 1.09 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 9.13 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 9.22 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 23 
 Blind Sample ID = 25201-75197  Mean = 25.40 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 1.37 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 1.23 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 1.70 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 3.81 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 4.83 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 4.57 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 22 
 Blind Sample ID = 25181-75179  Mean = 2.68 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 7.15 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 20 
 Blind Sample ID = 25179-75177  Mean = 3.44 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 27 
 Blind Sample ID = 25177-75175
The SGPlot Procedure



- Chromium, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01034, MCode: GF094
Dates: 10/21/04 through 09/01/05
Open Data Set

 Mean = 1.14 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 11 
 Blind Sample ID = 50175-50DIW  Mean = 3.49 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 24 
 Blind Sample ID = 50175-50173  Mean = 2.72 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 25 
 Blind Sample ID = 50173-50DIW  Mean = 1.61 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 4.30 
 % Relative Standard Deviation = 18.4 
 Number of Observations = 24 
 Blind Sample ID = 50171-50173  Mean = 2.25 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 24 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Chromium, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01034, MCode: PLA15
Dates: 11/02/07 through 07/29/14
Open Data Set

 Mean = 0.66 
 % Relative Standard Deviation = 10.9 
 Number of Observations = 6 
 Blind Sample ID = 75205-25DIW  Mean = 1.59 
 % Relative Standard Deviation = 37.7 
 Number of Observations = 7 
 Blind Sample ID = 75197-25DIW  Mean = 1.32 
 % Relative Standard Deviation = 46.6 
 Number of Observations = 5 
 Blind Sample ID = 75195-25197  Mean = 2.95 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 16 
 Blind Sample ID = 75193-25DIW  Mean = 3.55 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 8 
 Blind Sample ID = 75193-25197  Mean = 2.54 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 16 
 Blind Sample ID = 75191-25DIW  Mean = 2.15 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 12 
 Blind Sample ID = 75189-25DIW  Mean = 3.20 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 8 
 Blind Sample ID = 75189-25193  Mean = 3.16 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 6 
 Blind Sample ID = 75189-25191  Mean = 0.72 
 % Relative Standard Deviation = 20.5 
 Number of Observations = 9 
 Blind Sample ID = 75187-25DIW  Mean = 0.90 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 6 
 Blind Sample ID = 75185-25DIW  Mean = 1.76 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 6 
 Blind Sample ID = 75183-25DIW  Mean = 2.09 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 6 
 Blind Sample ID = 50187-50191  Mean = 1.96 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 8 
 Blind Sample ID = 50187-50189  Mean = 1.60 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 6 
 Blind Sample ID = 50187-50183  Mean = 1.08 
 % Relative Standard Deviation = 19.0 
 Number of Observations = 8 
 Blind Sample ID = 50185-50187  Mean = 1.74 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 8 
 Blind Sample ID = 50183-50185  Mean = 0.92 
 % Relative Standard Deviation = 27.3 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 1.69 
 % Relative Standard Deviation = 24.5 
 Number of Observations = 5 
 Blind Sample ID = 25195-75197  Mean = 1.90 
 % Relative Standard Deviation = 24.5 
 Number of Observations = 6 
 Blind Sample ID = 25193-75195  Mean = 3.73 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 6 
 Blind Sample ID = 25191-75193
The SGPlot Procedure



- Chromium, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01034, MCode: PLO07
Dates: 11/06/19 through 09/30/22
Open Data Set

 Mean = 2.40 
 % Relative Standard Deviation = 19.1 
 Number of Observations = 8 
 Blind Sample ID = T239  Mean = 2.70 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 6 
 Blind Sample ID = T237  Mean = 1.87 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 12 
 Blind Sample ID = T235  Mean = 1.62 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 11 
 Blind Sample ID = T233  Mean = 7.04 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 8 
 Blind Sample ID = T229  Mean = 1.03 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 5 
 Blind Sample ID = T225
The SGPlot Procedure



- Chromium, UNF, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01034, MCode: PLM11
Dates: 09/30/05 through 04/22/15
Open Data Set

 Mean = 4.64 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 4 
 Blind Sample ID = 75213-25DIW  Mean = 1.99 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 0.37 
 % Relative Standard Deviation = 26.8 
 Number of Observations = 5 
 Blind Sample ID = 75207-25DIW  Mean = 0.89 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 13 
 Blind Sample ID = 75205-25DIW  Mean = 0.70 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 7 
 Blind Sample ID = 75203-25DIW  Mean = 25.73 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 24 
 Blind Sample ID = 75201-25DIW  Mean = 9.68 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 11 
 Blind Sample ID = 75199-25201  Mean = 1.03 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 37 
 Blind Sample ID = 75197-25DIW  Mean = 1.29 
 % Relative Standard Deviation = 11.4 
 Number of Observations = 11 
 Blind Sample ID = 75195-25197  Mean = 3.09 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 31 
 Blind Sample ID = 75193-25DIW  Mean = 3.40 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 12 
 Blind Sample ID = 75193-25197  Mean = 2.87 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 38 
 Blind Sample ID = 75191-25DIW  Mean = 2.57 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 40 
 Blind Sample ID = 75189-25DIW  Mean = 3.50 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 12 
 Blind Sample ID = 75189-25193  Mean = 3.53 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 16 
 Blind Sample ID = 75189-25191  Mean = 0.60 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 34 
 Blind Sample ID = 75187-25DIW  Mean = 0.91 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 16 
 Blind Sample ID = 75185-25DIW  Mean = 1.69 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 28 
 Blind Sample ID = 75183-25DIW  Mean = 4.11 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 16 
 Blind Sample ID = 75181-25DIW  Mean = 3.06 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 30 
 Blind Sample ID = 75179-25DIW  Mean = 1.48 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 16 
 Blind Sample ID = 75175-25DIW  Mean = 2.35 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 2.07 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 1.58 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 16 
 Blind Sample ID = 50187-50183  Mean = 1.05 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 12 
 Blind Sample ID = 50185-50187  Mean = 1.76 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 13 
 Blind Sample ID = 50183-50185  Mean = 5.99 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 16 
 Blind Sample ID = 50177-50179  Mean = 0.96 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 17 
 Blind Sample ID = 50175-50DIW  Mean = 3.58 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 0.88 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 4.70 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213  Mean = 0.36 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 7 
 Blind Sample ID = 25209-75207  Mean = 1.05 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 0.41 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 26.38 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 25205-75201  Mean = 1.06 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 8 
 Blind Sample ID = 25203-75205  Mean = 8.89 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 9.69 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 14 
 Blind Sample ID = 25201-75197  Mean = 25.88 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 4 
 Blind Sample ID = 25199-75201  Mean = 1.34 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 12 
 Blind Sample ID = 25197-75199  Mean = 1.41 
 % Relative Standard Deviation = 17.3 
 Number of Observations = 16 
 Blind Sample ID = 25195-75197  Mean = 1.89 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 12 
 Blind Sample ID = 25193-75195  Mean = 4.07 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 12 
 Blind Sample ID = 25191-75193  Mean = 4.69 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 4.48 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 16 
 Blind Sample ID = 25181-75179  Mean = 2.55 
 % Relative Standard Deviation = 20.7 
 Number of Observations = 16 
 Blind Sample ID = 25179-75183  Mean = 6.85 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 16 
 Blind Sample ID = 25179-75177  Mean = 3.41 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 18 
 Blind Sample ID = 25177-75175
The SGPlot Procedure



- Chromium, UNF, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01034, MCode: PLM77
Dates: 05/12/15 through 08/26/22
Open Data Set

 Mean = 0.91 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 2.99 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 2.75 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 1.80 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 23 
 Blind Sample ID = T235  Mean = 1.79 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 0.63 
 % Relative Standard Deviation = 33.7 
 Number of Observations = 3 
 Blind Sample ID = T231  Mean = 7.42 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 21 
 Blind Sample ID = T229  Mean = 0.66 
 % Relative Standard Deviation = 11.6 
 Number of Observations = 9 
 Blind Sample ID = T227  Mean = 1.52 
 % Relative Standard Deviation = 19.9 
 Number of Observations = 22 
 Blind Sample ID = T225  Mean = 0.67 
 % Relative Standard Deviation = 33.3 
 Number of Observations = 23 
 Blind Sample ID = T223  Mean = 1.87 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 22 
 Blind Sample ID = T221  Mean = 0.73 
 % Relative Standard Deviation = 30.3 
 Number of Observations = 15 
 Blind Sample ID = T219  Mean = 1.50 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 23 
 Blind Sample ID = T217  Mean = 2.97 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 15 
 Blind Sample ID = T215  Mean = 2.80 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 16 
 Blind Sample ID = T211  Mean = 4.67 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 14 
 Blind Sample ID = 75213-25DIW  Mean = 1.92 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 3.57 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 3 
 Blind Sample ID = 25213-75211  Mean = 0.78 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 4.81 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Cobalt, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01035, MCode: PLM43
Dates: 10/13/04 through 07/19/06
Open Data Set

 Mean = 0.83 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 15 
 Blind Sample ID = 75179-25DIW  Mean = 5.93 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 12 
 Blind Sample ID = 75175-25DIW  Mean = 1.91 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 10 
 Blind Sample ID = 50177-50179  Mean = 3.69 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 33 
 Blind Sample ID = 50175-50DIW  Mean = 4.34 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 0.62 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 23 
 Blind Sample ID = 50173-50DIW  Mean = 2.33 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 2.94 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 2.25 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 13 
 Blind Sample ID = 25179-75177  Mean = 6.38 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 16 
 Blind Sample ID = 25177-75175  Mean = 6.75 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Cobalt, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01035, MCode: PLA11
Dates: 03/03/05 through 08/25/05
Open Data Set

 Mean = 3.90 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 4 
 Blind Sample ID = 50175-50DIW  Mean = 4.58 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 4 
 Blind Sample ID = 50175-50173  Mean = 2.79 
 % Relative Standard Deviation = 32.1 
 Number of Observations = 4 
 Blind Sample ID = 50171-50DIW  Mean = 7.16 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 8 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Cobalt, FIL, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01035, MCode: PLM10
Dates: 11/15/05 through 09/29/22
Open Data Set

 Mean = 0.48 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 13 
 Blind Sample ID = T243  Mean = 1.57 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 3.10 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 0.39 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 0.38 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 1.47 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 1.48 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 2.98 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 0.24 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 41 
 Blind Sample ID = T227  Mean = 1.00 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 3.29 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 47 
 Blind Sample ID = T223  Mean = 2.29 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 46 
 Blind Sample ID = T221  Mean = 0.83 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 42 
 Blind Sample ID = T219  Mean = 0.46 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 40 
 Blind Sample ID = T217  Mean = 1.22 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 2.10 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 31 
 Blind Sample ID = T211  Mean = 0.08 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 16 
 Blind Sample ID = T209  Mean = 0.53 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 34 
 Blind Sample ID = 75213-25DIW  Mean = 1.53 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 0.06 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 28 
 Blind Sample ID = 75209-25DIW  Mean = 0.70 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 0.68 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 32 
 Blind Sample ID = 75205-25DIW  Mean = 0.42 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 12.91 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 43 
 Blind Sample ID = 75201-25DIW  Mean = 4.43 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 4.12 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 1.52 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 19 
 Blind Sample ID = 75195-25197  Mean = 0.99 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 2.27 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 0.87 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 1.69 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 48 
 Blind Sample ID = 75189-25DIW  Mean = 2.06 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 2.00 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 0.15 
 % Relative Standard Deviation = 16.1 
 Number of Observations = 33 
 Blind Sample ID = 75187-25DIW  Mean = 0.33 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 16 
 Blind Sample ID = 75185-25DIW  Mean = 2.99 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 33 
 Blind Sample ID = 75183-25DIW  Mean = 4.06 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 0.80 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 30 
 Blind Sample ID = 75179-25DIW  Mean = 5.51 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 7 
 Blind Sample ID = 75175-25DIW  Mean = 0.73 
 % Relative Standard Deviation = 39.9 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 1.19 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 1.98 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 15 
 Blind Sample ID = 50187-50183  Mean = 0.30 
 % Relative Standard Deviation = 19.2 
 Number of Observations = 12 
 Blind Sample ID = 50185-50187  Mean = 1.95 
 % Relative Standard Deviation = 25.0 
 Number of Observations = 11 
 Blind Sample ID = 50183-50185  Mean = 1.78 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = 50177-50179  Mean = 3.60 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 6 
 Blind Sample ID = 50175-50DIW  Mean = 0.61 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 4 
 Blind Sample ID = 50173-50DIW  Mean = 1.69 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 0.59 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 15 
 Blind Sample ID = 25211-75209  Mean = 0.57 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 0.71 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 13 
 Blind Sample ID = 25209-75207  Mean = 0.90 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 13 
 Blind Sample ID = 25207-75205  Mean = 0.28 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 13.16 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 0.82 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 4.75 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 8.38 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 22 
 Blind Sample ID = 25201-75197  Mean = 12.83 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 1.50 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 4.12 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 0.57 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 1.27 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 5.12 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 2.23 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 22 
 Blind Sample ID = 25181-75179  Mean = 3.24 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 2.11 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 7 
 Blind Sample ID = 25179-75177  Mean = 6.09 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 11 
 Blind Sample ID = 25177-75175
The SGPlot Procedure



- Cobalt, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01037, MCode: PLM48
Dates: 02/01/06 through 04/23/07
Open Data Set

 Mean = 2.88 
 % Relative Standard Deviation = 0.4 
 Number of Observations = 3 
 Blind Sample ID = 75183-25DIW  Mean = 0.82 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 13 
 Blind Sample ID = 75179-25DIW  Mean = 5.30 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 7 
 Blind Sample ID = 75175-25DIW  Mean = 1.87 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 50177-50179  Mean = 3.70 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 6 
 Blind Sample ID = 50175-50DIW  Mean = 2.15 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 8 
 Blind Sample ID = 25179-75177  Mean = 6.12 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 8 
 Blind Sample ID = 25177-75175
The SGPlot Procedure



- Cobalt, UNF, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01037, MCode: PLM11
Dates: 12/30/05 through 04/30/15
Open Data Set

 Mean = 0.50 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 4 
 Blind Sample ID = 75213-25DIW  Mean = 1.47 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 0.05 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 0.67 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 0.66 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 13 
 Blind Sample ID = 75205-25DIW  Mean = 0.39 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 8 
 Blind Sample ID = 75203-25DIW  Mean = 12.75 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 16 
 Blind Sample ID = 75201-25DIW  Mean = 4.50 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 8 
 Blind Sample ID = 75199-25201  Mean = 4.08 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 24 
 Blind Sample ID = 75197-25DIW  Mean = 1.64 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 8 
 Blind Sample ID = 75195-25197  Mean = 1.02 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 16 
 Blind Sample ID = 75193-25DIW  Mean = 2.35 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 8 
 Blind Sample ID = 75193-25197  Mean = 0.86 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 16 
 Blind Sample ID = 75191-25DIW  Mean = 1.71 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 16 
 Blind Sample ID = 75189-25DIW  Mean = 2.08 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 75189-25193  Mean = 2.00 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = 75189-25191  Mean = 0.15 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 16 
 Blind Sample ID = 75187-25DIW  Mean = 0.33 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 8 
 Blind Sample ID = 75185-25DIW  Mean = 2.92 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 12 
 Blind Sample ID = 75183-25DIW  Mean = 3.99 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 8 
 Blind Sample ID = 75181-25DIW  Mean = 0.68 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 8 
 Blind Sample ID = 50187-50191  Mean = 1.30 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 7 
 Blind Sample ID = 50187-50189  Mean = 2.06 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 8 
 Blind Sample ID = 50187-50183  Mean = 0.32 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 8 
 Blind Sample ID = 50185-50187  Mean = 2.18 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 9 
 Blind Sample ID = 50183-50185  Mean = 1.65 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 0.56 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 0.52 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213  Mean = 0.70 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 0.90 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 0.26 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 13.31 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 8 
 Blind Sample ID = 25205-75201  Mean = 0.78 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 25203-75205  Mean = 4.73 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 8.51 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = 25201-75197  Mean = 1.49 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 8 
 Blind Sample ID = 25197-75199  Mean = 4.24 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 8 
 Blind Sample ID = 25195-75197  Mean = 0.59 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = 25193-75195  Mean = 1.31 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 8 
 Blind Sample ID = 25191-75193  Mean = 4.91 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 7 
 Blind Sample ID = 25183-75181  Mean = 2.18 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 5 
 Blind Sample ID = 25181-75179  Mean = 3.12 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 8 
 Blind Sample ID = 25179-75183
The SGPlot Procedure



- Cobalt, UNF, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01037, MCode: PLM77
Dates: 05/12/15 through 08/26/22
Open Data Set

 Mean = 0.49 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 1.59 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 3.09 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 0.40 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 0.38 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 23 
 Blind Sample ID = T235  Mean = 1.46 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 1.51 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 21 
 Blind Sample ID = T231  Mean = 3.00 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 21 
 Blind Sample ID = T229  Mean = 0.25 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 24 
 Blind Sample ID = T227  Mean = 1.02 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 23 
 Blind Sample ID = T225  Mean = 3.33 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 23 
 Blind Sample ID = T223  Mean = 2.29 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 22 
 Blind Sample ID = T221  Mean = 0.83 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 24 
 Blind Sample ID = T219  Mean = 0.45 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 24 
 Blind Sample ID = T217  Mean = 1.19 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 16 
 Blind Sample ID = T215  Mean = 2.07 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 16 
 Blind Sample ID = T211  Mean = 0.08 
 % Relative Standard Deviation = 19.4 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 0.50 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 14 
 Blind Sample ID = 75213-25DIW  Mean = 1.48 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 1.70 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 3 
 Blind Sample ID = 25213-75211  Mean = 0.55 
 % Relative Standard Deviation = 1.0 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 0.53 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Copper, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: PLM43
Dates: 10/13/04 through 07/19/06
Open Data Set

 Mean = 2.98 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 17 
 Blind Sample ID = 75179-25DIW  Mean = 1.70 
 % Relative Standard Deviation = 33.1 
 Number of Observations = 12 
 Blind Sample ID = 75175-25DIW  Mean = 6.05 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 10 
 Blind Sample ID = 50177-50179  Mean = 1.02 
 % Relative Standard Deviation = 21.9 
 Number of Observations = 36 
 Blind Sample ID = 50175-50DIW  Mean = 4.90 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 3.98 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 23 
 Blind Sample ID = 50173-50DIW  Mean = 0.54 
 % Relative Standard Deviation = 17.7 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 4.55 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 7.05 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 13 
 Blind Sample ID = 25179-75177  Mean = 3.60 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 18 
 Blind Sample ID = 25177-75175  Mean = 1.71 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Copper, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: PLA11
Dates: 11/05/04 through 09/29/05
Open Data Set

 Mean = 1.26 
 % Relative Standard Deviation = 11.1 
 Number of Observations = 4 
 Blind Sample ID = 50175-50DIW  Mean = 5.00 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 4 
 Blind Sample ID = 50175-50173  Mean = 3.33 
 % Relative Standard Deviation = 14.9 
 Number of Observations = 4 
 Blind Sample ID = 50173-50DIW  Mean = 1.20 
 % Relative Standard Deviation = 14.3 
 Number of Observations = 3 
 Blind Sample ID = 50171-50DIW  Mean = 2.17 
 % Relative Standard Deviation = 44.3 
 Number of Observations = 11 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Copper, FIL, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01040, MCode: PLM10
Dates: 11/22/05 through 09/29/22
Open Data Set

 Mean = 5.76 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 13 
 Blind Sample ID = T243  Mean = 2.23 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 1.56 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 8.37 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 6.99 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 45 
 Blind Sample ID = T235  Mean = 3.89 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 6.25 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 21.93 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 8.15 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 38 
 Blind Sample ID = T227  Mean = 2.57 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 3.81 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 46 
 Blind Sample ID = T223  Mean = 3.86 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 45 
 Blind Sample ID = T221  Mean = 20.35 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 42 
 Blind Sample ID = T219  Mean = 4.36 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 41 
 Blind Sample ID = T217  Mean = 0.93 
 % Relative Standard Deviation = 14.4 
 Number of Observations = 20 
 Blind Sample ID = T215  Mean = 1.47 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 29 
 Blind Sample ID = T211  Mean = 1.60 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 16 
 Blind Sample ID = T209  Mean = 3.94 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 34 
 Blind Sample ID = 75213-25DIW  Mean = 0.90 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 13 
 Blind Sample ID = 75211-25DIW  Mean = 1.12 
 % Relative Standard Deviation = 15.1 
 Number of Observations = 28 
 Blind Sample ID = 75209-25DIW  Mean = 6.14 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 1.04 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 33 
 Blind Sample ID = 75205-25DIW  Mean = 1.18 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 15.16 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 43 
 Blind Sample ID = 75201-25DIW  Mean = 6.75 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 20.48 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 9.34 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 19 
 Blind Sample ID = 75195-25197  Mean = 1.40 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 7.87 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 1.60 
 % Relative Standard Deviation = 18.5 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 2.27 
 % Relative Standard Deviation = 17.5 
 Number of Observations = 48 
 Blind Sample ID = 75189-25DIW  Mean = 2.57 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 2.58 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 1.60 
 % Relative Standard Deviation = 14.0 
 Number of Observations = 41 
 Blind Sample ID = 75187-25DIW  Mean = 0.74 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 2.29 
 % Relative Standard Deviation = 15.6 
 Number of Observations = 41 
 Blind Sample ID = 75183-25DIW  Mean = 5.79 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 2.88 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 28 
 Blind Sample ID = 75179-25DIW  Mean = 1.41 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 7 
 Blind Sample ID = 75175-25DIW  Mean = 2.03 
 % Relative Standard Deviation = 18.0 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 2.30 
 % Relative Standard Deviation = 21.2 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 2.46 
 % Relative Standard Deviation = 14.5 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 1.43 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 20 
 Blind Sample ID = 50185-50187  Mean = 2.04 
 % Relative Standard Deviation = 20.9 
 Number of Observations = 19 
 Blind Sample ID = 50183-50185  Mean = 5.63 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 8 
 Blind Sample ID = 50177-50179  Mean = 1.36 
 % Relative Standard Deviation = 53.2 
 Number of Observations = 3 
 Blind Sample ID = 50175-50DIW  Mean = 3.80 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 3 
 Blind Sample ID = 50173-50DIW  Mean = 2.19 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 1.53 
 % Relative Standard Deviation = 16.4 
 Number of Observations = 16 
 Blind Sample ID = 25211-75209  Mean = 4.30 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 6.43 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 13 
 Blind Sample ID = 25209-75207  Mean = 3.12 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 12 
 Blind Sample ID = 25207-75205  Mean = 1.52 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 15.63 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 1.50 
 % Relative Standard Deviation = 9.6 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 6.46 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 25.29 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 22 
 Blind Sample ID = 25201-75197  Mean = 15.93 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 8.57 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 21.13 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 3.01 
 % Relative Standard Deviation = 20.7 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 1.78 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 6.64 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 4.88 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 23 
 Blind Sample ID = 25181-75179  Mean = 3.22 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 6.52 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 7 
 Blind Sample ID = 25179-75177  Mean = 3.26 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 9 
 Blind Sample ID = 25177-75175
The SGPlot Procedure



- Copper, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01042, MCode: GF099
Dates: 10/20/04 through 06/17/05
Open Data Set

 Mean = 1.61 
 % Relative Standard Deviation = 58.6 
 Number of Observations = 8 
 Blind Sample ID = 50175-50DIW  Mean = 5.78 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 4 
 Blind Sample ID = 50175-50173  Mean = 5.07 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 3 
 Blind Sample ID = 50173-50DIW  Mean = 1.16 
 % Relative Standard Deviation = 25.9 
 Number of Observations = 15 
 Blind Sample ID = 50171-50DIW  Mean = 4.09 
 % Relative Standard Deviation = 38.0 
 Number of Observations = 3 
 Blind Sample ID = 50171-50173  Mean = 2.37 
 % Relative Standard Deviation = 20.3 
 Number of Observations = 15 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Copper, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01042, MCode: PLM48
Dates: 11/01/04 through 04/23/07
Open Data Set

 Mean = 2.46 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 6 
 Blind Sample ID = 75183-25DIW  Mean = 3.04 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 25 
 Blind Sample ID = 75179-25DIW  Mean = 1.56 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 19 
 Blind Sample ID = 75175-25DIW  Mean = 6.07 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 18 
 Blind Sample ID = 50177-50179  Mean = 1.15 
 % Relative Standard Deviation = 24.8 
 Number of Observations = 21 
 Blind Sample ID = 50175-50DIW  Mean = 5.20 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 19 
 Blind Sample ID = 50175-50173  Mean = 4.38 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 21 
 Blind Sample ID = 50173-50DIW  Mean = 0.61 
 % Relative Standard Deviation = 47.3 
 Number of Observations = 11 
 Blind Sample ID = 50171-50DIW  Mean = 5.10 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 16 
 Blind Sample ID = 50171-50173  Mean = 5.05 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 9 
 Blind Sample ID = 25181-75179  Mean = 7.08 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 20 
 Blind Sample ID = 25179-75177  Mean = 3.66 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 26 
 Blind Sample ID = 25177-75175  Mean = 2.04 
 % Relative Standard Deviation = 21.0 
 Number of Observations = 19 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Copper, UNF, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01042, MCode: PLM11
Dates: 12/30/05 through 07/26/16
Open Data Set

 Mean = 3.72 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 7 
 Blind Sample ID = 75213-25DIW  Mean = 0.84 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 1.13 
 % Relative Standard Deviation = 14.2 
 Number of Observations = 22 
 Blind Sample ID = 75209-25DIW  Mean = 6.11 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 1.00 
 % Relative Standard Deviation = 12.3 
 Number of Observations = 32 
 Blind Sample ID = 75205-25DIW  Mean = 1.22 
 % Relative Standard Deviation = 20.8 
 Number of Observations = 15 
 Blind Sample ID = 75203-25DIW  Mean = 15.13 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 36 
 Blind Sample ID = 75201-25DIW  Mean = 6.83 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 12 
 Blind Sample ID = 75199-25201  Mean = 20.35 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 48 
 Blind Sample ID = 75197-25DIW  Mean = 9.50 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 1.35 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 8.04 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 1.63 
 % Relative Standard Deviation = 23.4 
 Number of Observations = 26 
 Blind Sample ID = 75191-25DIW  Mean = 2.18 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 45 
 Blind Sample ID = 75189-25DIW  Mean = 2.54 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 19 
 Blind Sample ID = 75189-25193  Mean = 2.61 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 1.61 
 % Relative Standard Deviation = 38.6 
 Number of Observations = 24 
 Blind Sample ID = 75187-25DIW  Mean = 0.84 
 % Relative Standard Deviation = 26.0 
 Number of Observations = 14 
 Blind Sample ID = 75185-25DIW  Mean = 2.24 
 % Relative Standard Deviation = 15.7 
 Number of Observations = 34 
 Blind Sample ID = 75183-25DIW  Mean = 5.80 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 2.82 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 18 
 Blind Sample ID = 75179-25DIW  Mean = 2.14 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 8 
 Blind Sample ID = 50187-50191  Mean = 2.43 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 2.19 
 % Relative Standard Deviation = 21.4 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 1.46 
 % Relative Standard Deviation = 29.8 
 Number of Observations = 19 
 Blind Sample ID = 50185-50187  Mean = 2.06 
 % Relative Standard Deviation = 29.1 
 Number of Observations = 19 
 Blind Sample ID = 50183-50185  Mean = 2.20 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 1.24 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 6 
 Blind Sample ID = 25211-75209  Mean = 4.13 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213  Mean = 6.40 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 14 
 Blind Sample ID = 25209-75207  Mean = 3.07 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 14 
 Blind Sample ID = 25207-75205  Mean = 1.43 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 15.48 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 1.38 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 6.37 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 25.67 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 15 
 Blind Sample ID = 25201-75197  Mean = 15.46 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 4 
 Blind Sample ID = 25199-75201  Mean = 8.49 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 12 
 Blind Sample ID = 25197-75199  Mean = 20.69 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 3.11 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 1.89 
 % Relative Standard Deviation = 25.5 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 6.45 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 4.58 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 12 
 Blind Sample ID = 25181-75179  Mean = 3.26 
 % Relative Standard Deviation = 25.8 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183
The SGPlot Procedure



- Copper, UNF, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01042, MCode: PLM77
Dates: 05/12/15 through 08/26/22
Open Data Set

 Mean = 5.94 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 2.22 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 1.60 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 8.46 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 6.94 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 23 
 Blind Sample ID = T235  Mean = 3.95 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 6.39 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 23 
 Blind Sample ID = T231  Mean = 22.25 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 22 
 Blind Sample ID = T229  Mean = 8.42 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 28 
 Blind Sample ID = T227  Mean = 2.50 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 30 
 Blind Sample ID = T225  Mean = 3.91 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 30 
 Blind Sample ID = T223  Mean = 3.89 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 31 
 Blind Sample ID = T221  Mean = 20.56 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 30 
 Blind Sample ID = T219  Mean = 4.25 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 29 
 Blind Sample ID = T217  Mean = 0.93 
 % Relative Standard Deviation = 32.3 
 Number of Observations = 16 
 Blind Sample ID = T215  Mean = 1.46 
 % Relative Standard Deviation = 17.2 
 Number of Observations = 21 
 Blind Sample ID = T211  Mean = 1.58 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 12 
 Blind Sample ID = T209  Mean = 3.92 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 19 
 Blind Sample ID = 75213-25DIW  Mean = 0.92 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 6 
 Blind Sample ID = 75211-25DIW  Mean = 2.08 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 1.31 
 % Relative Standard Deviation = 21.2 
 Number of Observations = 6 
 Blind Sample ID = 25211-75209  Mean = 4.55 
 % Relative Standard Deviation = 16.1 
 Number of Observations = 6 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Dimethylarsinate (DMA), IC-ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 62455, MCode: PLM35
Dates: 11/16/04 through 10/12/07
Open Data Set

 Mean = 9.37 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 18 
 Blind Sample ID = AS6  Mean = 12.50 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 47 
 Blind Sample ID = AS4
The SGPlot Procedure



- Iron, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01046, MCode: PLA11
Dates: 10/09/04 through 09/28/22
Open Data Set

 Mean = 644.86 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 14 
 Blind Sample ID = T243  Mean = 236.40 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 19 
 Blind Sample ID = T241  Mean = 90.30 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 35 
 Blind Sample ID = T239  Mean = 627.29 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 34 
 Blind Sample ID = T237  Mean = 709.29 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 56 
 Blind Sample ID = T235  Mean = 280.06 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 44 
 Blind Sample ID = T233  Mean = 253.16 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 47 
 Blind Sample ID = T231  Mean = 855.17 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 54 
 Blind Sample ID = T229  Mean = 332.72 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 50 
 Blind Sample ID = T227  Mean = 40.01 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 53 
 Blind Sample ID = T225  Mean = 373.85 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 59 
 Blind Sample ID = T223  Mean = 330.15 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 48 
 Blind Sample ID = T221  Mean = 356.07 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 50 
 Blind Sample ID = T219  Mean = 55.95 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 59 
 Blind Sample ID = T217  Mean = 90.89 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 38 
 Blind Sample ID = T215  Mean = 58.22 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 34 
 Blind Sample ID = T211  Mean = 165.49 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 20 
 Blind Sample ID = T209  Mean = 387.16 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 36 
 Blind Sample ID = 75213-25DIW  Mean = 42.95 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 20 
 Blind Sample ID = 75211-25DIW  Mean = 120.63 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 35 
 Blind Sample ID = 75209-25DIW  Mean = 323.58 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 18 
 Blind Sample ID = 75207-25DIW  Mean = 50.34 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 38 
 Blind Sample ID = 75205-25DIW  Mean = 39.59 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 20 
 Blind Sample ID = 75203-25DIW  Mean = 1365.55 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 47 
 Blind Sample ID = 75201-25DIW  Mean = 590.75 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 21 
 Blind Sample ID = 75199-25201  Mean = 1458.39 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 46 
 Blind Sample ID = 75197-25DIW  Mean = 789.13 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = 75195-25197  Mean = 132.01 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 47 
 Blind Sample ID = 75193-25DIW  Mean = 619.77 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 26 
 Blind Sample ID = 75193-25197  Mean = 58.72 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 24 
 Blind Sample ID = 75191-25DIW  Mean = 24.08 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 24 
 Blind Sample ID = 75189-25DIW  Mean = 67.38 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 26 
 Blind Sample ID = 75189-25193  Mean = 43.16 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 22 
 Blind Sample ID = 75189-25191  Mean = 151.52 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 23 
 Blind Sample ID = 75183-25DIW  Mean = 88.25 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 18 
 Blind Sample ID = 75181-25DIW  Mean = 93.20 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 47 
 Blind Sample ID = 75179-25DIW  Mean = 27.27 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 24 
 Blind Sample ID = 75175-25DIW  Mean = 63.36 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 24 
 Blind Sample ID = 50187-50191  Mean = 62.48 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 24 
 Blind Sample ID = 50177-50179  Mean = 19.36 
 % Relative Standard Deviation = 13.1 
 Number of Observations = 47 
 Blind Sample ID = 50175-50DIW  Mean = 28.02 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 23 
 Blind Sample ID = 50175-50173  Mean = 12.33 
 % Relative Standard Deviation = 13.3 
 Number of Observations = 23 
 Blind Sample ID = 50173-50DIW  Mean = 25.82 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 36.58 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 172.17 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 20 
 Blind Sample ID = 25213-75211  Mean = 135.34 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 18 
 Blind Sample ID = 25211-75209  Mean = 425.56 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 18 
 Blind Sample ID = 25209-75213  Mean = 372.34 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 18 
 Blind Sample ID = 25209-75207  Mean = 159.08 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 18 
 Blind Sample ID = 25207-75205  Mean = 135.73 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 18 
 Blind Sample ID = 25205-75209  Mean = 1390.39 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 18 
 Blind Sample ID = 25205-75201  Mean = 64.10 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 18 
 Blind Sample ID = 25203-75205  Mean = 490.93 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 22 
 Blind Sample ID = 25201-75203  Mean = 1920.36 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 22 
 Blind Sample ID = 25201-75197  Mean = 1405.79 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = 25199-75201  Mean = 620.48 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = 25197-75199  Mean = 1539.29 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 21 
 Blind Sample ID = 25195-75197  Mean = 359.73 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 24 
 Blind Sample ID = 25193-75195  Mean = 153.15 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 24 
 Blind Sample ID = 25191-75193  Mean = 134.15 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 31 
 Blind Sample ID = 25183-75181  Mean = 120.15 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 22 
 Blind Sample ID = 25181-75179  Mean = 178.49 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 15 
 Blind Sample ID = 25179-75183  Mean = 38.49 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 24 
 Blind Sample ID = 25179-75177  Mean = 28.22 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 24 
 Blind Sample ID = 25177-75175  Mean = 35.15 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 28 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Iron, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01045, MCode: PLA15
Dates: 10/20/04 through 03/24/15
Open Data Set

 Mean = 372.20 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 5 
 Blind Sample ID = 75213-25DIW  Mean = 42.55 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 7 
 Blind Sample ID = 75211-25DIW  Mean = 117.97 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 19 
 Blind Sample ID = 75209-25DIW  Mean = 322.59 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 51.18 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 30 
 Blind Sample ID = 75205-25DIW  Mean = 38.56 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 12 
 Blind Sample ID = 75203-25DIW  Mean = 1313.73 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 37 
 Blind Sample ID = 75201-25DIW  Mean = 572.95 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 18 
 Blind Sample ID = 75199-25201  Mean = 1422.34 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 32 
 Blind Sample ID = 75197-25DIW  Mean = 796.79 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 16 
 Blind Sample ID = 75195-25197  Mean = 137.76 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 31 
 Blind Sample ID = 75193-25DIW  Mean = 618.12 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 18 
 Blind Sample ID = 75193-25197  Mean = 63.11 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 30 
 Blind Sample ID = 75191-25DIW  Mean = 25.64 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 30 
 Blind Sample ID = 75189-25DIW  Mean = 69.50 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 18 
 Blind Sample ID = 75189-25193  Mean = 45.86 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 14 
 Blind Sample ID = 75189-25191  Mean = 40.22 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 30 
 Blind Sample ID = 75187-25DIW  Mean = 156.39 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 14 
 Blind Sample ID = 75185-25DIW  Mean = 154.27 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 29 
 Blind Sample ID = 75183-25DIW  Mean = 90.55 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 11 
 Blind Sample ID = 75181-25DIW  Mean = 97.18 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 31 
 Blind Sample ID = 75179-25DIW  Mean = 30.55 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 16 
 Blind Sample ID = 75175-25DIW  Mean = 69.42 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 16 
 Blind Sample ID = 50187-50191  Mean = 44.71 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 18 
 Blind Sample ID = 50187-50189  Mean = 127.88 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 16 
 Blind Sample ID = 50187-50183  Mean = 131.84 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 16 
 Blind Sample ID = 50185-50187  Mean = 205.17 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 18 
 Blind Sample ID = 50183-50185  Mean = 69.28 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 16 
 Blind Sample ID = 50177-50179  Mean = 19.45 
 % Relative Standard Deviation = 20.5 
 Number of Observations = 31 
 Blind Sample ID = 50175-50DIW  Mean = 30.75 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 16 
 Blind Sample ID = 50175-50173  Mean = 12.24 
 % Relative Standard Deviation = 12.6 
 Number of Observations = 15 
 Blind Sample ID = 50173-50DIW  Mean = 27.09 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 16 
 Blind Sample ID = 50171-50DIW  Mean = 39.09 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 12 
 Blind Sample ID = 50171-50173  Mean = 169.26 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 8 
 Blind Sample ID = 25213-75211  Mean = 132.86 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 5 
 Blind Sample ID = 25211-75209  Mean = 410.97 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 6 
 Blind Sample ID = 25209-75213  Mean = 360.63 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 16 
 Blind Sample ID = 25209-75207  Mean = 159.53 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 14 
 Blind Sample ID = 25207-75205  Mean = 135.21 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 1299.79 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 14 
 Blind Sample ID = 25205-75201  Mean = 63.18 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 12 
 Blind Sample ID = 25203-75205  Mean = 479.04 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 14 
 Blind Sample ID = 25201-75203  Mean = 1849.33 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 18 
 Blind Sample ID = 25201-75197  Mean = 1376.70 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 20 
 Blind Sample ID = 25199-75201  Mean = 603.28 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 18 
 Blind Sample ID = 25197-75199  Mean = 1539.08 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 13 
 Blind Sample ID = 25195-75197  Mean = 367.08 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 16 
 Blind Sample ID = 25193-75195  Mean = 157.49 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 16 
 Blind Sample ID = 25191-75193  Mean = 138.74 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 22 
 Blind Sample ID = 25183-75181  Mean = 126.54 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 15 
 Blind Sample ID = 25181-75179  Mean = 182.26 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 8 
 Blind Sample ID = 25179-75183  Mean = 44.52 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 16 
 Blind Sample ID = 25179-75177  Mean = 33.42 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 16 
 Blind Sample ID = 25177-75175  Mean = 41.68 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 20 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Iron, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01045, MCode: PLO07
Dates: 05/28/15 through 09/30/22
Open Data Set

 Mean = 633.10 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 4 
 Blind Sample ID = T243  Mean = 241.15 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 91.08 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 15 
 Blind Sample ID = T239  Mean = 624.77 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 10 
 Blind Sample ID = T237  Mean = 698.20 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 22 
 Blind Sample ID = T235  Mean = 277.70 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 17 
 Blind Sample ID = T233  Mean = 254.19 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 18 
 Blind Sample ID = T231  Mean = 842.74 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 21 
 Blind Sample ID = T229  Mean = 332.02 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 24 
 Blind Sample ID = T227  Mean = 40.31 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 18 
 Blind Sample ID = T225  Mean = 374.00 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 23 
 Blind Sample ID = T223  Mean = 331.86 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 18 
 Blind Sample ID = T221  Mean = 350.08 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 18 
 Blind Sample ID = T219  Mean = 54.78 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 24 
 Blind Sample ID = T217  Mean = 90.67 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 16 
 Blind Sample ID = T215  Mean = 56.60 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 12 
 Blind Sample ID = T211  Mean = 163.25 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 389.01 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 15 
 Blind Sample ID = 75213-25DIW  Mean = 43.04 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 9 
 Blind Sample ID = 75211-25DIW  Mean = 122.80 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 8 
 Blind Sample ID = 75209-25DIW  Mean = 170.29 
 % Relative Standard Deviation = 0.7 
 Number of Observations = 8 
 Blind Sample ID = 25213-75211  Mean = 137.18 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 9 
 Blind Sample ID = 25211-75209  Mean = 424.65 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 8 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Lead, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01049, MCode: PLM43
Dates: 10/13/04 through 09/29/22
Open Data Set

 Mean = 4.32 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 13 
 Blind Sample ID = T243  Mean = 1.83 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 2.56 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 6.76 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 1.20 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 0.34 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 3.60 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 13.51 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 6.64 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 40 
 Blind Sample ID = T227  Mean = 4.23 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 0.56 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 47 
 Blind Sample ID = T223  Mean = 0.46 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 46 
 Blind Sample ID = T221  Mean = 2.52 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 42 
 Blind Sample ID = T219  Mean = 0.26 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 41 
 Blind Sample ID = T217  Mean = 0.40 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 1.63 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 31 
 Blind Sample ID = T211  Mean = 0.37 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 15 
 Blind Sample ID = T209  Mean = 2.24 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 34 
 Blind Sample ID = 75213-25DIW  Mean = 1.25 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 0.28 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 26 
 Blind Sample ID = 75209-25DIW  Mean = 3.48 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 1.03 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 32 
 Blind Sample ID = 75205-25DIW  Mean = 8.47 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 58.03 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 43 
 Blind Sample ID = 75201-25DIW  Mean = 20.52 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 1.33 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 5.02 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 0.23 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 0.64 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 1.02 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 0.10 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 48 
 Blind Sample ID = 75189-25DIW  Mean = 0.17 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 0.43 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 0.47 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 41 
 Blind Sample ID = 75187-25DIW  Mean = 0.16 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 4.43 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 41 
 Blind Sample ID = 75183-25DIW  Mean = 7.49 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 1.50 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 52 
 Blind Sample ID = 75179-25DIW  Mean = 2.47 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 27 
 Blind Sample ID = 75175-25DIW  Mean = 0.93 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 0.36 
 % Relative Standard Deviation = 23.2 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 3.15 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 23 
 Blind Sample ID = 50187-50183  Mean = 0.39 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 20 
 Blind Sample ID = 50185-50187  Mean = 2.96 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 17 
 Blind Sample ID = 50183-50185  Mean = 3.34 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 26 
 Blind Sample ID = 50177-50179  Mean = 1.53 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 46 
 Blind Sample ID = 50175-50DIW  Mean = 3.93 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 2.41 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 28 
 Blind Sample ID = 50173-50DIW  Mean = 0.54 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 2.93 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 1.99 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 0.70 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 15 
 Blind Sample ID = 25211-75209  Mean = 2.37 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 3.56 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 13 
 Blind Sample ID = 25209-75207  Mean = 2.20 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 13 
 Blind Sample ID = 25207-75205  Mean = 0.62 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 58.96 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 3.84 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 27.78 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 20.59 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 22 
 Blind Sample ID = 25201-75197  Mean = 58.18 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 1.61 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 2.78 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 4.77 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 19 
 Blind Sample ID = 25193-75195  Mean = 0.56 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 8.64 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 3.88 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 23 
 Blind Sample ID = 25181-75179  Mean = 5.03 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 3.82 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 28 
 Blind Sample ID = 25179-75177  Mean = 3.57 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 35 
 Blind Sample ID = 25177-75175  Mean = 2.56 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Lead, UNF, GFAA -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01051, MCode: GF100
Dates: 10/20/04 through 08/18/05
Open Data Set

 Mean = 1.76 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 8 
 Blind Sample ID = 50175-50DIW  Mean = 4.15 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 12 
 Blind Sample ID = 50175-50173  Mean = 2.55 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 5 
 Blind Sample ID = 50173-50DIW  Mean = 0.63 
 % Relative Standard Deviation = 13.5 
 Number of Observations = 14 
 Blind Sample ID = 50171-50DIW  Mean = 3.10 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 12 
 Blind Sample ID = 50171-50173  Mean = 2.53 
 % Relative Standard Deviation = 28.1 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Lead, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01051, MCode: PLM48
Dates: 11/01/04 through 04/30/15
Open Data Set

 Mean = 2.25 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 9 
 Blind Sample ID = 75213-25DIW  Mean = 1.25 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 6 
 Blind Sample ID = 75211-25DIW  Mean = 0.29 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 23 
 Blind Sample ID = 75209-25DIW  Mean = 3.55 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 1.04 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 33 
 Blind Sample ID = 75205-25DIW  Mean = 8.19 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 54.82 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 36 
 Blind Sample ID = 75201-25DIW  Mean = 19.51 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 12 
 Blind Sample ID = 75199-25201  Mean = 1.33 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 48 
 Blind Sample ID = 75197-25DIW  Mean = 5.21 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 0.23 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 0.68 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 1.05 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 46 
 Blind Sample ID = 75191-25DIW  Mean = 0.10 
 % Relative Standard Deviation = 21.3 
 Number of Observations = 48 
 Blind Sample ID = 75189-25DIW  Mean = 0.19 
 % Relative Standard Deviation = 44.9 
 Number of Observations = 19 
 Blind Sample ID = 75189-25193  Mean = 0.43 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 0.53 
 % Relative Standard Deviation = 31.4 
 Number of Observations = 40 
 Blind Sample ID = 75187-25DIW  Mean = 0.17 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 4.38 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 41 
 Blind Sample ID = 75183-25DIW  Mean = 6.94 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 1.35 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 52 
 Blind Sample ID = 75179-25DIW  Mean = 2.29 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 27 
 Blind Sample ID = 75175-25DIW  Mean = 1.06 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 0.43 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 3.24 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 0.41 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 20 
 Blind Sample ID = 50185-50187  Mean = 3.02 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 19 
 Blind Sample ID = 50183-50185  Mean = 3.13 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 26 
 Blind Sample ID = 50177-50179  Mean = 1.52 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 36 
 Blind Sample ID = 50175-50DIW  Mean = 4.00 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 19 
 Blind Sample ID = 50175-50173  Mean = 2.38 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 26 
 Blind Sample ID = 50173-50DIW  Mean = 0.54 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 12 
 Blind Sample ID = 50171-50DIW  Mean = 2.91 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 16 
 Blind Sample ID = 50171-50173  Mean = 1.98 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 7 
 Blind Sample ID = 25213-75211  Mean = 0.70 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 10 
 Blind Sample ID = 25211-75209  Mean = 2.38 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 6 
 Blind Sample ID = 25209-75213  Mean = 3.62 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 14 
 Blind Sample ID = 25209-75207  Mean = 2.22 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 14 
 Blind Sample ID = 25207-75205  Mean = 0.62 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 54.23 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 3.75 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 26.70 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 19.35 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 15 
 Blind Sample ID = 25201-75197  Mean = 55.48 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 4 
 Blind Sample ID = 25199-75201  Mean = 1.54 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 12 
 Blind Sample ID = 25197-75199  Mean = 2.87 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 4.87 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 0.57 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 8.36 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 3.73 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 23 
 Blind Sample ID = 25181-75179  Mean = 4.81 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 3.73 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 28 
 Blind Sample ID = 25179-75177  Mean = 3.33 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 34 
 Blind Sample ID = 25177-75175  Mean = 2.60 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 20 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Lead, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01051, MCode: PLM78
Dates: 05/12/15 through 08/26/22
Open Data Set

 Mean = 4.27 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 1.76 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 2.60 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 6.56 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 1.19 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 23 
 Blind Sample ID = T235  Mean = 0.34 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 3.66 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 23 
 Blind Sample ID = T231  Mean = 13.57 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 22 
 Blind Sample ID = T229  Mean = 6.70 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 30 
 Blind Sample ID = T227  Mean = 4.21 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 33 
 Blind Sample ID = T225  Mean = 0.58 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 41 
 Blind Sample ID = T223  Mean = 0.48 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 40 
 Blind Sample ID = T221  Mean = 2.53 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 40 
 Blind Sample ID = T219  Mean = 0.26 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 40 
 Blind Sample ID = T217  Mean = 0.40 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 1.65 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 32 
 Blind Sample ID = T211  Mean = 0.38 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 15 
 Blind Sample ID = T209  Mean = 2.27 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 25 
 Blind Sample ID = 75213-25DIW  Mean = 1.23 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 8 
 Blind Sample ID = 75211-25DIW  Mean = 0.30 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 4 
 Blind Sample ID = 75209-25DIW  Mean = 2.03 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 7 
 Blind Sample ID = 25213-75211  Mean = 0.71 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 6 
 Blind Sample ID = 25211-75209  Mean = 2.43 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 8 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Lithium, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01130, MCode: PLM40
Dates: 10/27/04 through 09/29/22
Open Data Set

 Mean = 2.20 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 12 
 Blind Sample ID = T243  Mean = 12.70 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 2.76 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 18.64 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 3.84 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 2.53 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 63.86 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 23.91 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 0.72 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 40 
 Blind Sample ID = T227  Mean = 9.07 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 1.22 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 50 
 Blind Sample ID = T223  Mean = 2.55 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 48 
 Blind Sample ID = T221  Mean = 21.58 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 47 
 Blind Sample ID = T219  Mean = 11.63 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 48 
 Blind Sample ID = T217  Mean = 8.32 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 35 
 Blind Sample ID = T215  Mean = 1.38 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 37 
 Blind Sample ID = T211  Mean = 3.18 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 18 
 Blind Sample ID = T209  Mean = 52.44 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 38 
 Blind Sample ID = 75213-25DIW  Mean = 1.00 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 2.41 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 26 
 Blind Sample ID = 75209-25DIW  Mean = 15.93 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 1.34 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 33 
 Blind Sample ID = 75205-25DIW  Mean = 4.82 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 20.33 
 % Relative Standard Deviation = 9.8 
 Number of Observations = 42 
 Blind Sample ID = 75201-25DIW  Mean = 7.70 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 6.06 
 % Relative Standard Deviation = 12.1 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 2.70 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 2.13 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 4.16 
 % Relative Standard Deviation = 12.5 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 2.99 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 2.72 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 47 
 Blind Sample ID = 75189-25DIW  Mean = 3.37 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 3.62 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 2.79 
 % Relative Standard Deviation = 14.1 
 Number of Observations = 41 
 Blind Sample ID = 75187-25DIW  Mean = 4.93 
 % Relative Standard Deviation = 13.6 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 2.44 
 % Relative Standard Deviation = 15.6 
 Number of Observations = 41 
 Blind Sample ID = 75183-25DIW  Mean = 6.05 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 4.72 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 52 
 Blind Sample ID = 75179-25DIW  Mean = 2.36 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 27 
 Blind Sample ID = 75175-25DIW  Mean = 3.74 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 19 
 Blind Sample ID = 50187-50191  Mean = 3.70 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 14 
 Blind Sample ID = 50187-50189  Mean = 3.21 
 % Relative Standard Deviation = 24.8 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 5.15 
 % Relative Standard Deviation = 12.7 
 Number of Observations = 19 
 Blind Sample ID = 50185-50187  Mean = 4.57 
 % Relative Standard Deviation = 14.2 
 Number of Observations = 18 
 Blind Sample ID = 50183-50185  Mean = 10.69 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 26 
 Blind Sample ID = 50177-50179  Mean = 1.66 
 % Relative Standard Deviation = 13.9 
 Number of Observations = 30 
 Blind Sample ID = 50175-50DIW  Mean = 10.31 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 19 
 Blind Sample ID = 50175-50173  Mean = 8.60 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 21 
 Blind Sample ID = 50173-50DIW  Mean = 3.19 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 12 
 Blind Sample ID = 50171-50DIW  Mean = 11.22 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 16 
 Blind Sample ID = 50171-50173  Mean = 19.29 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 2.73 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 16 
 Blind Sample ID = 25211-75209  Mean = 53.54 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 17.17 
 % Relative Standard Deviation = 8.5 
 Number of Observations = 13 
 Blind Sample ID = 25209-75207  Mean = 6.59 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 13 
 Blind Sample ID = 25207-75205  Mean = 2.77 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 20.67 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 2.96 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 11.97 
 % Relative Standard Deviation = 8.1 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 12.38 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 23 
 Blind Sample ID = 25201-75197  Mean = 19.64 
 % Relative Standard Deviation = 12.4 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 2.89 
 % Relative Standard Deviation = 10.3 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 6.40 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 1.41 
 % Relative Standard Deviation = 10.2 
 Number of Observations = 19 
 Blind Sample ID = 25193-75195  Mean = 2.92 
 % Relative Standard Deviation = 11.7 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 7.20 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 6.85 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 23 
 Blind Sample ID = 25181-75179  Mean = 4.04 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 12.68 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 28 
 Blind Sample ID = 25179-75177  Mean = 6.05 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 35 
 Blind Sample ID = 25177-75175  Mean = 3.86 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 20 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Lithium, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01130, MCode: PLA11
Dates: 10/09/04 through 08/06/16
Open Data Set

 Mean = 10.48 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 4 
 Blind Sample ID = T217  Mean = 7.88 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 3 
 Blind Sample ID = T215  Mean = 3.41 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 6 
 Blind Sample ID = T209  Mean = 52.59 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 8 
 Blind Sample ID = 75213-25DIW  Mean = 0.86 
 % Relative Standard Deviation = 41.8 
 Number of Observations = 8 
 Blind Sample ID = 75211-25DIW  Mean = 2.41 
 % Relative Standard Deviation = 15.7 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 15.28 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 1.20 
 % Relative Standard Deviation = 22.5 
 Number of Observations = 14 
 Blind Sample ID = 75205-25DIW  Mean = 4.28 
 % Relative Standard Deviation = 7.9 
 Number of Observations = 6 
 Blind Sample ID = 75203-25DIW  Mean = 18.63 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 15 
 Blind Sample ID = 75201-25DIW  Mean = 8.06 
 % Relative Standard Deviation = 21.7 
 Number of Observations = 6 
 Blind Sample ID = 75199-25201  Mean = 8.08 
 % Relative Standard Deviation = 15.4 
 Number of Observations = 16 
 Blind Sample ID = 75197-25DIW  Mean = 3.54 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 6 
 Blind Sample ID = 75195-25197  Mean = 2.57 
 % Relative Standard Deviation = 5.3 
 Number of Observations = 16 
 Blind Sample ID = 75193-25DIW  Mean = 5.39 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 8 
 Blind Sample ID = 75193-25197  Mean = 3.57 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 16 
 Blind Sample ID = 75191-25DIW  Mean = 3.80 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 12 
 Blind Sample ID = 75189-25DIW  Mean = 4.88 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 8 
 Blind Sample ID = 75189-25193  Mean = 5.02 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 6 
 Blind Sample ID = 75189-25191  Mean = 3.33 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 12 
 Blind Sample ID = 75187-25DIW  Mean = 5.68 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 5 
 Blind Sample ID = 75185-25DIW  Mean = 2.77 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 13 
 Blind Sample ID = 75183-25DIW  Mean = 6.86 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 8 
 Blind Sample ID = 75181-25DIW  Mean = 5.52 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 12 
 Blind Sample ID = 75179-25DIW  Mean = 2.47 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 4 
 Blind Sample ID = 75175-25DIW  Mean = 4.89 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 6 
 Blind Sample ID = 50187-50191  Mean = 4.99 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 8 
 Blind Sample ID = 50187-50189  Mean = 4.14 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 6 
 Blind Sample ID = 50187-50183  Mean = 6.35 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 8 
 Blind Sample ID = 50185-50187  Mean = 5.66 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 8 
 Blind Sample ID = 50183-50185  Mean = 1.49 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 11 
 Blind Sample ID = 50175-50DIW  Mean = 11.41 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 50175-50173  Mean = 9.26 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 8 
 Blind Sample ID = 50173-50DIW  Mean = 2.84 
 % Relative Standard Deviation = 18.0 
 Number of Observations = 8 
 Blind Sample ID = 50171-50DIW  Mean = 13.01 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 4 
 Blind Sample ID = 50171-50173  Mean = 18.19 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 8 
 Blind Sample ID = 25213-75211  Mean = 2.58 
 % Relative Standard Deviation = 20.9 
 Number of Observations = 6 
 Blind Sample ID = 25211-75209  Mean = 53.12 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 6 
 Blind Sample ID = 25209-75213  Mean = 16.20 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 6.32 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 2.77 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 21.53 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 6 
 Blind Sample ID = 25205-75201  Mean = 2.74 
 % Relative Standard Deviation = 7.7 
 Number of Observations = 6 
 Blind Sample ID = 25203-75205  Mean = 9.80 
 % Relative Standard Deviation = 8.2 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 14.06 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 6 
 Blind Sample ID = 25201-75197  Mean = 24.09 
 % Relative Standard Deviation = 14.6 
 Number of Observations = 6 
 Blind Sample ID = 25199-75201  Mean = 3.04 
 % Relative Standard Deviation = 22.4 
 Number of Observations = 6 
 Blind Sample ID = 25197-75199  Mean = 8.98 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 5 
 Blind Sample ID = 25195-75197  Mean = 1.72 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 6 
 Blind Sample ID = 25193-75195  Mean = 3.87 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 6 
 Blind Sample ID = 25191-75193  Mean = 8.04 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 8.06 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 25181-75179  Mean = 14.31 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 4 
 Blind Sample ID = 25179-75177  Mean = 6.96 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 4 
 Blind Sample ID = 25177-75175  Mean = 4.12 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 12 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Lithium, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01132, MCode: PLM48
Dates: 10/04/12 through 04/30/15
Open Data Set

 Mean = 53.01 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 4 
 Blind Sample ID = 75213-25DIW  Mean = 0.98 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 2.37 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 15.54 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 1.24 
 % Relative Standard Deviation = 13.0 
 Number of Observations = 13 
 Blind Sample ID = 75205-25DIW  Mean = 4.65 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 8 
 Blind Sample ID = 75203-25DIW  Mean = 20.46 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 9 
 Blind Sample ID = 75201-25DIW  Mean = 18.37 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 2.70 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 55.40 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213  Mean = 17.88 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 6.32 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 2.84 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 21.55 
 % Relative Standard Deviation = 13.2 
 Number of Observations = 8 
 Blind Sample ID = 25205-75201  Mean = 2.69 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 8 
 Blind Sample ID = 25203-75205  Mean = 11.53 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203
The SGPlot Procedure



- Lithium, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01132, MCode: PLM78
Dates: 05/12/15 through 09/21/22
Open Data Set

 Mean = 1.88 
 % Relative Standard Deviation = 7.8 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 11.84 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 2.36 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 17.34 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 3.68 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 23 
 Blind Sample ID = T235  Mean = 2.37 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 63.39 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 20 
 Blind Sample ID = T231  Mean = 24.05 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 21 
 Blind Sample ID = T229  Mean = 0.68 
 % Relative Standard Deviation = 8.3 
 Number of Observations = 24 
 Blind Sample ID = T227  Mean = 9.56 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 23 
 Blind Sample ID = T225  Mean = 1.22 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 23 
 Blind Sample ID = T223  Mean = 2.41 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 22 
 Blind Sample ID = T221  Mean = 20.73 
 % Relative Standard Deviation = 7.0 
 Number of Observations = 24 
 Blind Sample ID = T219  Mean = 11.22 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 24 
 Blind Sample ID = T217  Mean = 7.98 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 16 
 Blind Sample ID = T215  Mean = 1.30 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 16 
 Blind Sample ID = T211  Mean = 3.26 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 53.86 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 13 
 Blind Sample ID = 75213-25DIW  Mean = 0.83 
 % Relative Standard Deviation = 24.6 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 16.04 
 % Relative Standard Deviation = 0.6 
 Number of Observations = 3 
 Blind Sample ID = 25213-75211  Mean = 2.72 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 55.56 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Manganese, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01056, MCode: PLM43
Dates: 10/13/04 through 09/29/22
Open Data Set

 Mean = 391.23 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 13 
 Blind Sample ID = T243  Mean = 18.02 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 8.08 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 123.98 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 49.72 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 18.55 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 28.09 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 686.65 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 67.36 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 40 
 Blind Sample ID = T227  Mean = 40.62 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 27.37 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 47 
 Blind Sample ID = T223  Mean = 33.60 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 46 
 Blind Sample ID = T221  Mean = 224.25 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 41 
 Blind Sample ID = T219  Mean = 203.80 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 41 
 Blind Sample ID = T217  Mean = 79.45 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 47.34 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 31 
 Blind Sample ID = T211  Mean = 11.28 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 15 
 Blind Sample ID = T209  Mean = 500.01 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 34 
 Blind Sample ID = 75213-25DIW  Mean = 34.99 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 8.18 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 26 
 Blind Sample ID = 75209-25DIW  Mean = 174.26 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 6.99 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 33 
 Blind Sample ID = 75205-25DIW  Mean = 95.06 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 1336.30 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 43 
 Blind Sample ID = 75201-25DIW  Mean = 460.64 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 1202.34 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 469.20 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 13.63 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 409.45 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 20.06 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 4.91 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 47 
 Blind Sample ID = 75189-25DIW  Mean = 9.35 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 11.63 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 4.32 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 40 
 Blind Sample ID = 75187-25DIW  Mean = 8.29 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 36.73 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 40 
 Blind Sample ID = 75183-25DIW  Mean = 8.64 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 32.85 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 52 
 Blind Sample ID = 75179-25DIW  Mean = 37.54 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 27 
 Blind Sample ID = 75175-25DIW  Mean = 16.06 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 19 
 Blind Sample ID = 50187-50191  Mean = 6.07 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 14 
 Blind Sample ID = 50187-50189  Mean = 27.24 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 23 
 Blind Sample ID = 50187-50183  Mean = 8.41 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 20 
 Blind Sample ID = 50185-50187  Mean = 29.76 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 18 
 Blind Sample ID = 50183-50185  Mean = 200.19 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 26 
 Blind Sample ID = 50177-50179  Mean = 23.72 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 46 
 Blind Sample ID = 50175-50DIW  Mean = 266.64 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 245.91 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 28 
 Blind Sample ID = 50173-50DIW  Mean = 5.92 
 % Relative Standard Deviation = 7.1 
 Number of Observations = 23 
 Blind Sample ID = 50171-50DIW  Mean = 249.37 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 199.68 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 20.08 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 15 
 Blind Sample ID = 25211-75209  Mean = 499.39 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 178.48 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 13 
 Blind Sample ID = 25209-75207  Mean = 65.92 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 13 
 Blind Sample ID = 25207-75205  Mean = 10.49 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 1344.93 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 39.69 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 539.34 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 1646.87 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 22 
 Blind Sample ID = 25201-75197  Mean = 1318.44 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 421.56 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 1212.25 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 76.36 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 19.91 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 20.46 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 36.49 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 22 
 Blind Sample ID = 25181-75179  Mean = 47.02 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 269.62 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 28 
 Blind Sample ID = 25179-75177  Mean = 124.93 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 35 
 Blind Sample ID = 25177-75175  Mean = 37.82 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Manganese, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01056, MCode: PLA11
Dates: 10/09/04 through 09/28/22
Open Data Set

 Mean = 376.01 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 14 
 Blind Sample ID = T243  Mean = 18.15 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 19 
 Blind Sample ID = T241  Mean = 7.91 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 35 
 Blind Sample ID = T239  Mean = 121.22 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 34 
 Blind Sample ID = T237  Mean = 49.83 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 56 
 Blind Sample ID = T235  Mean = 18.81 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 44 
 Blind Sample ID = T233  Mean = 28.66 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 47 
 Blind Sample ID = T231  Mean = 681.72 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 54 
 Blind Sample ID = T229  Mean = 68.73 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 50 
 Blind Sample ID = T227  Mean = 43.52 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 53 
 Blind Sample ID = T225  Mean = 28.28 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 59 
 Blind Sample ID = T223  Mean = 34.70 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 48 
 Blind Sample ID = T221  Mean = 225.71 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 50 
 Blind Sample ID = T219  Mean = 206.78 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 60 
 Blind Sample ID = T217  Mean = 79.19 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 37 
 Blind Sample ID = T215  Mean = 46.59 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 34 
 Blind Sample ID = T211  Mean = 11.02 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 20 
 Blind Sample ID = T209  Mean = 489.91 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 36 
 Blind Sample ID = 75213-25DIW  Mean = 33.82 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 20 
 Blind Sample ID = 75211-25DIW  Mean = 7.99 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 35 
 Blind Sample ID = 75209-25DIW  Mean = 172.42 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 18 
 Blind Sample ID = 75207-25DIW  Mean = 6.92 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 37 
 Blind Sample ID = 75205-25DIW  Mean = 92.76 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 20 
 Blind Sample ID = 75203-25DIW  Mean = 1263.55 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 47 
 Blind Sample ID = 75201-25DIW  Mean = 446.60 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 22 
 Blind Sample ID = 75199-25201  Mean = 1146.24 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 46 
 Blind Sample ID = 75197-25DIW  Mean = 463.32 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 24 
 Blind Sample ID = 75195-25197  Mean = 13.19 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 400.14 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 26 
 Blind Sample ID = 75193-25197  Mean = 19.63 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 32 
 Blind Sample ID = 75191-25DIW  Mean = 4.94 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 30 
 Blind Sample ID = 75189-25DIW  Mean = 8.96 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 26 
 Blind Sample ID = 75189-25193  Mean = 11.08 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 22 
 Blind Sample ID = 75189-25191  Mean = 4.39 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 30 
 Blind Sample ID = 75187-25DIW  Mean = 8.32 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 22 
 Blind Sample ID = 75185-25DIW  Mean = 36.41 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 44 
 Blind Sample ID = 75183-25DIW  Mean = 8.79 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 18 
 Blind Sample ID = 75181-25DIW  Mean = 32.86 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 47 
 Blind Sample ID = 75179-25DIW  Mean = 37.12 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = 75175-25DIW  Mean = 16.30 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 6 
 Blind Sample ID = 50187-50191  Mean = 6.19 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 8 
 Blind Sample ID = 50187-50189  Mean = 26.96 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 8.42 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 24 
 Blind Sample ID = 50185-50187  Mean = 29.08 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 26 
 Blind Sample ID = 50183-50185  Mean = 190.48 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 24 
 Blind Sample ID = 50177-50179  Mean = 24.75 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 47 
 Blind Sample ID = 50175-50DIW  Mean = 272.95 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 23 
 Blind Sample ID = 50175-50173  Mean = 248.00 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 23 
 Blind Sample ID = 50173-50DIW  Mean = 6.23 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 253.86 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 196.78 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 19 
 Blind Sample ID = 25213-75211  Mean = 19.38 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 18 
 Blind Sample ID = 25211-75209  Mean = 482.43 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 18 
 Blind Sample ID = 25209-75213  Mean = 175.15 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 17 
 Blind Sample ID = 25209-75207  Mean = 65.09 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 18 
 Blind Sample ID = 25207-75205  Mean = 10.35 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 18 
 Blind Sample ID = 25205-75209  Mean = 1242.82 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 17 
 Blind Sample ID = 25205-75201  Mean = 37.69 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 18 
 Blind Sample ID = 25203-75205  Mean = 511.87 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 22 
 Blind Sample ID = 25201-75203  Mean = 1559.68 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 22 
 Blind Sample ID = 25201-75197  Mean = 1263.29 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 24 
 Blind Sample ID = 25199-75201  Mean = 406.90 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 24 
 Blind Sample ID = 25197-75199  Mean = 1146.19 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 21 
 Blind Sample ID = 25195-75197  Mean = 75.20 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 24 
 Blind Sample ID = 25193-75195  Mean = 19.35 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 24 
 Blind Sample ID = 25191-75193  Mean = 20.78 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 31 
 Blind Sample ID = 25183-75181  Mean = 35.38 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 23 
 Blind Sample ID = 25181-75179  Mean = 46.70 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 15 
 Blind Sample ID = 25179-75183  Mean = 259.01 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = 25179-75177  Mean = 121.65 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 24 
 Blind Sample ID = 25177-75175  Mean = 40.31 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 28 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Manganese, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01055, MCode: PLM48
Dates: 11/01/04 through 04/30/15
Open Data Set

 Mean = 498.00 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 4 
 Blind Sample ID = 75213-25DIW  Mean = 34.94 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 8.17 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 170.25 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 6.77 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 13 
 Blind Sample ID = 75205-25DIW  Mean = 92.29 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 8 
 Blind Sample ID = 75203-25DIW  Mean = 1296.44 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 24 
 Blind Sample ID = 75201-25DIW  Mean = 444.63 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 12 
 Blind Sample ID = 75199-25201  Mean = 1190.27 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 48 
 Blind Sample ID = 75197-25DIW  Mean = 469.99 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 13.82 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 40 
 Blind Sample ID = 75193-25DIW  Mean = 406.28 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 20.60 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 30 
 Blind Sample ID = 75191-25DIW  Mean = 5.25 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 32 
 Blind Sample ID = 75189-25DIW  Mean = 9.55 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 11 
 Blind Sample ID = 75189-25193  Mean = 11.86 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 16 
 Blind Sample ID = 75189-25191  Mean = 4.61 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 26 
 Blind Sample ID = 75187-25DIW  Mean = 8.47 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 16 
 Blind Sample ID = 75185-25DIW  Mean = 36.11 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 27 
 Blind Sample ID = 75183-25DIW  Mean = 8.63 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 16 
 Blind Sample ID = 75181-25DIW  Mean = 31.64 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 36 
 Blind Sample ID = 75179-25DIW  Mean = 35.28 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 23 
 Blind Sample ID = 75175-25DIW  Mean = 16.95 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 12 
 Blind Sample ID = 50187-50191  Mean = 6.59 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 7 
 Blind Sample ID = 50187-50189  Mean = 27.50 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 16 
 Blind Sample ID = 50187-50183  Mean = 8.82 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 12 
 Blind Sample ID = 50185-50187  Mean = 30.58 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 11 
 Blind Sample ID = 50183-50185  Mean = 187.16 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 24 
 Blind Sample ID = 50177-50179  Mean = 23.42 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 22 
 Blind Sample ID = 50175-50DIW  Mean = 257.10 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 12 
 Blind Sample ID = 50175-50173  Mean = 230.58 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 13 
 Blind Sample ID = 50173-50DIW  Mean = 6.04 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 8 
 Blind Sample ID = 50171-50DIW  Mean = 236.17 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 12 
 Blind Sample ID = 50171-50173  Mean = 197.90 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 19.71 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 506.80 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213  Mean = 178.55 
 % Relative Standard Deviation = 1.1 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 64.71 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 10.36 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 1305.75 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 8 
 Blind Sample ID = 25205-75201  Mean = 38.03 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 8 
 Blind Sample ID = 25203-75205  Mean = 525.51 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 1620.14 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 14 
 Blind Sample ID = 25201-75197  Mean = 1312.75 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 4 
 Blind Sample ID = 25199-75201  Mean = 409.68 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 12 
 Blind Sample ID = 25197-75199  Mean = 1213.58 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 74.99 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 20.66 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 13 
 Blind Sample ID = 25191-75193  Mean = 20.30 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 35.42 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 16 
 Blind Sample ID = 25181-75179  Mean = 45.50 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 14 
 Blind Sample ID = 25179-75183  Mean = 255.68 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 24 
 Blind Sample ID = 25179-75177  Mean = 117.06 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 26 
 Blind Sample ID = 25177-75175  Mean = 36.24 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 8 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Manganese, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01055, MCode: PLM78
Dates: 05/12/15 through 08/27/22
Open Data Set

 Mean = 399.13 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 7 
 Blind Sample ID = T243  Mean = 17.11 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 7.97 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 121.28 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 48.58 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 23 
 Blind Sample ID = T235  Mean = 18.06 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 27.75 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 21 
 Blind Sample ID = T231  Mean = 689.07 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 21 
 Blind Sample ID = T229  Mean = 67.40 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 24 
 Blind Sample ID = T227  Mean = 43.72 
 % Relative Standard Deviation = 5.5 
 Number of Observations = 23 
 Blind Sample ID = T225  Mean = 27.38 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 23 
 Blind Sample ID = T223  Mean = 33.30 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 22 
 Blind Sample ID = T221  Mean = 223.23 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 24 
 Blind Sample ID = T219  Mean = 204.22 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 24 
 Blind Sample ID = T217  Mean = 78.02 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 16 
 Blind Sample ID = T215  Mean = 45.94 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 16 
 Blind Sample ID = T211  Mean = 11.07 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 496.94 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 14 
 Blind Sample ID = 75213-25DIW  Mean = 33.75 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 197.90 
 % Relative Standard Deviation = 0.4 
 Number of Observations = 3 
 Blind Sample ID = 25213-75211  Mean = 19.91 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 497.90 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Manganese, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01055, MCode: PLA15
Dates: 10/20/04 through 03/27/15
Open Data Set

 Mean = 442.12 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 5 
 Blind Sample ID = 75213-25DIW  Mean = 32.35 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 7 
 Blind Sample ID = 75211-25DIW  Mean = 7.61 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 19 
 Blind Sample ID = 75209-25DIW  Mean = 164.51 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 6.55 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 22 
 Blind Sample ID = 75205-25DIW  Mean = 89.43 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 6 
 Blind Sample ID = 75203-25DIW  Mean = 1217.19 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 16 
 Blind Sample ID = 75201-25DIW  Mean = 433.80 
 % Relative Standard Deviation = 0.5 
 Number of Observations = 6 
 Blind Sample ID = 75199-25201  Mean = 1121.31 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 16 
 Blind Sample ID = 75197-25DIW  Mean = 449.76 
 % Relative Standard Deviation = 1.0 
 Number of Observations = 5 
 Blind Sample ID = 75195-25197  Mean = 13.09 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 16 
 Blind Sample ID = 75193-25DIW  Mean = 393.83 
 % Relative Standard Deviation = 0.7 
 Number of Observations = 8 
 Blind Sample ID = 75193-25197  Mean = 19.50 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 16 
 Blind Sample ID = 75191-25DIW  Mean = 4.98 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 12 
 Blind Sample ID = 75189-25DIW  Mean = 9.23 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 75189-25193  Mean = 11.20 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 6 
 Blind Sample ID = 75189-25191  Mean = 4.29 
 % Relative Standard Deviation = 4.1 
 Number of Observations = 12 
 Blind Sample ID = 75187-25DIW  Mean = 8.06 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 6 
 Blind Sample ID = 75185-25DIW  Mean = 35.79 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 13 
 Blind Sample ID = 75183-25DIW  Mean = 8.54 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 8 
 Blind Sample ID = 75181-25DIW  Mean = 32.35 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 16 
 Blind Sample ID = 75179-25DIW  Mean = 35.48 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 8 
 Blind Sample ID = 75175-25DIW  Mean = 15.94 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 6 
 Blind Sample ID = 50187-50191  Mean = 5.99 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 8 
 Blind Sample ID = 50187-50189  Mean = 26.63 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 6 
 Blind Sample ID = 50187-50183  Mean = 8.25 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 8 
 Blind Sample ID = 50185-50187  Mean = 29.62 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 8 
 Blind Sample ID = 50183-50185  Mean = 184.65 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 8 
 Blind Sample ID = 50177-50179  Mean = 24.67 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 13 
 Blind Sample ID = 50175-50DIW  Mean = 264.69 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 8 
 Blind Sample ID = 50175-50173  Mean = 244.68 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 8 
 Blind Sample ID = 50173-50DIW  Mean = 6.14 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 8 
 Blind Sample ID = 50171-50DIW  Mean = 248.95 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 4 
 Blind Sample ID = 50171-50173  Mean = 185.11 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 8 
 Blind Sample ID = 25213-75211  Mean = 18.69 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 5 
 Blind Sample ID = 25211-75209  Mean = 451.47 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 6 
 Blind Sample ID = 25209-75213  Mean = 160.29 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 16 
 Blind Sample ID = 25209-75207  Mean = 62.10 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 14 
 Blind Sample ID = 25207-75205  Mean = 9.81 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 1190.67 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 6 
 Blind Sample ID = 25205-75201  Mean = 36.42 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 6 
 Blind Sample ID = 25203-75205  Mean = 494.39 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 1527.50 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 6 
 Blind Sample ID = 25201-75197  Mean = 1235.75 
 % Relative Standard Deviation = 0.9 
 Number of Observations = 8 
 Blind Sample ID = 25199-75201  Mean = 394.17 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 6 
 Blind Sample ID = 25197-75199  Mean = 1164.00 
 % Relative Standard Deviation = 1.2 
 Number of Observations = 5 
 Blind Sample ID = 25195-75197  Mean = 73.75 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 6 
 Blind Sample ID = 25193-75195  Mean = 19.43 
 % Relative Standard Deviation = 1.0 
 Number of Observations = 6 
 Blind Sample ID = 25191-75193  Mean = 20.27 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 34.86 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 8 
 Blind Sample ID = 25181-75179  Mean = 252.20 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 8 
 Blind Sample ID = 25179-75177  Mean = 117.27 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 8 
 Blind Sample ID = 25177-75175  Mean = 39.55 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 12 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Manganese, UNF, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01055, MCode: PLO07
Dates: 05/28/15 through 09/30/22
Open Data Set

 Mean = 368.82 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 5 
 Blind Sample ID = T243  Mean = 18.31 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 7.63 
 % Relative Standard Deviation = 6.8 
 Number of Observations = 15 
 Blind Sample ID = T239  Mean = 119.04 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 10 
 Blind Sample ID = T237  Mean = 49.04 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 22 
 Blind Sample ID = T235  Mean = 18.79 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 17 
 Blind Sample ID = T233  Mean = 28.75 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 18 
 Blind Sample ID = T231  Mean = 678.70 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 21 
 Blind Sample ID = T229  Mean = 68.55 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 24 
 Blind Sample ID = T227  Mean = 43.28 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 18 
 Blind Sample ID = T225  Mean = 28.10 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 23 
 Blind Sample ID = T223  Mean = 34.52 
 % Relative Standard Deviation = 1.5 
 Number of Observations = 18 
 Blind Sample ID = T221  Mean = 223.66 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 18 
 Blind Sample ID = T219  Mean = 204.83 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 24 
 Blind Sample ID = T217  Mean = 77.92 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 16 
 Blind Sample ID = T215  Mean = 45.97 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 12 
 Blind Sample ID = T211  Mean = 10.99 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 477.85 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 15 
 Blind Sample ID = 75213-25DIW  Mean = 33.70 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 9 
 Blind Sample ID = 75211-25DIW  Mean = 8.17 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 8 
 Blind Sample ID = 75209-25DIW  Mean = 193.75 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 8 
 Blind Sample ID = 25213-75211  Mean = 19.24 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 9 
 Blind Sample ID = 25211-75209  Mean = 473.69 
 % Relative Standard Deviation = 1.4 
 Number of Observations = 8 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Mercury, FIL,CVAF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 71890, MCode: CV014
Dates: 10/14/04 through 09/28/22
Open Data Set

 Mean = 0.02 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 4 
 Blind Sample ID = T243  Mean = 0.04 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 4 
 Blind Sample ID = T241  Mean = 0.04 
 % Relative Standard Deviation = 40.8 
 Number of Observations = 8 
 Blind Sample ID = T239  Mean = 0.04 
 % Relative Standard Deviation = 37.0 
 Number of Observations = 7 
 Blind Sample ID = T237  Mean = 0.02 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 7 
 Blind Sample ID = T235  Mean = 0.04 
 % Relative Standard Deviation = 17.7 
 Number of Observations = 10 
 Blind Sample ID = T233  Mean = 0.02 
 % Relative Standard Deviation = 50.2 
 Number of Observations = 10 
 Blind Sample ID = T231  Mean = 0.03 
 % Relative Standard Deviation = 29.9 
 Number of Observations = 6 
 Blind Sample ID = T229  Mean = 0.03 
 % Relative Standard Deviation = 18.8 
 Number of Observations = 6 
 Blind Sample ID = T227  Mean = 0.03 
 % Relative Standard Deviation = 13.7 
 Number of Observations = 6 
 Blind Sample ID = T225  Mean = 0.04 
 % Relative Standard Deviation = 7.3 
 Number of Observations = 11 
 Blind Sample ID = T223  Mean = 0.02 
 % Relative Standard Deviation = 13.7 
 Number of Observations = 12 
 Blind Sample ID = T221  Mean = 0.04 
 % Relative Standard Deviation = 24.3 
 Number of Observations = 16 
 Blind Sample ID = T219  Mean = 0.04 
 % Relative Standard Deviation = 51.7 
 Number of Observations = 16 
 Blind Sample ID = T217  Mean = 0.05 
 % Relative Standard Deviation = 32.1 
 Number of Observations = 12 
 Blind Sample ID = T215  Mean = 0.05 
 % Relative Standard Deviation = 26.3 
 Number of Observations = 12 
 Blind Sample ID = T211  Mean = 0.05 
 % Relative Standard Deviation = 39.4 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 0.05 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 18 
 Blind Sample ID = 75213-25DIW  Mean = 0.05 
 % Relative Standard Deviation = 26.7 
 Number of Observations = 8 
 Blind Sample ID = 75211-25DIW  Mean = 0.03 
 % Relative Standard Deviation = 47.6 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 0.05 
 % Relative Standard Deviation = 9.5 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 0.01 
 % Relative Standard Deviation = 16.5 
 Number of Observations = 13 
 Blind Sample ID = 75205-25DIW  Mean = 0.01 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 8 
 Blind Sample ID = 75203-25DIW  Mean = 0.04 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 16 
 Blind Sample ID = 75201-25DIW  Mean = 0.03 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 8 
 Blind Sample ID = 75199-25201  Mean = 0.04 
 % Relative Standard Deviation = 29.6 
 Number of Observations = 31 
 Blind Sample ID = 75197-25DIW  Mean = 0.03 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 11 
 Blind Sample ID = 75195-25197  Mean = 0.03 
 % Relative Standard Deviation = 17.1 
 Number of Observations = 30 
 Blind Sample ID = 75193-25DIW  Mean = 0.04 
 % Relative Standard Deviation = 31.4 
 Number of Observations = 12 
 Blind Sample ID = 75193-25197  Mean = 0.02 
 % Relative Standard Deviation = 80.6 
 Number of Observations = 23 
 Blind Sample ID = 75191-25DIW  Mean = 0.03 
 % Relative Standard Deviation = 20.4 
 Number of Observations = 20 
 Blind Sample ID = 75189-25DIW  Mean = 0.02 
 % Relative Standard Deviation = 45.3 
 Number of Observations = 12 
 Blind Sample ID = 75189-25193  Mean = 0.02 
 % Relative Standard Deviation = 52.2 
 Number of Observations = 14 
 Blind Sample ID = 75189-25191  Mean = 0.03 
 % Relative Standard Deviation = 31.1 
 Number of Observations = 24 
 Blind Sample ID = 75187-25DIW  Mean = 0.02 
 % Relative Standard Deviation = 49.7 
 Number of Observations = 16 
 Blind Sample ID = 75185-25DIW  Mean = 0.02 
 % Relative Standard Deviation = 19.7 
 Number of Observations = 28 
 Blind Sample ID = 75183-25DIW  Mean = 0.03 
 % Relative Standard Deviation = 39.4 
 Number of Observations = 16 
 Blind Sample ID = 75181-25DIW  Mean = 0.04 
 % Relative Standard Deviation = 30.9 
 Number of Observations = 29 
 Blind Sample ID = 75179-25DIW  Mean = 0.06 
 % Relative Standard Deviation = 27.4 
 Number of Observations = 16 
 Blind Sample ID = 75175-25DIW  Mean = 0.01 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 8 
 Blind Sample ID = 50187-50191  Mean = 0.01 
 % Relative Standard Deviation = 9.7 
 Number of Observations = 8 
 Blind Sample ID = 50187-50189  Mean = 0.02 
 % Relative Standard Deviation = 33.8 
 Number of Observations = 12 
 Blind Sample ID = 50187-50183  Mean = 0.03 
 % Relative Standard Deviation = 18.0 
 Number of Observations = 12 
 Blind Sample ID = 50185-50187  Mean = 0.02 
 % Relative Standard Deviation = 51.9 
 Number of Observations = 12 
 Blind Sample ID = 50183-50185  Mean = 0.05 
 % Relative Standard Deviation = 55.6 
 Number of Observations = 16 
 Blind Sample ID = 50177-50179  Mean = 0.05 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 15 
 Blind Sample ID = 50175-50DIW  Mean = 0.04 
 % Relative Standard Deviation = 27.3 
 Number of Observations = 19 
 Blind Sample ID = 50175-50173  Mean = 0.05 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 20 
 Blind Sample ID = 50173-50DIW  Mean = 0.03 
 % Relative Standard Deviation = 40.6 
 Number of Observations = 12 
 Blind Sample ID = 50171-50DIW  Mean = 0.04 
 % Relative Standard Deviation = 8.6 
 Number of Observations = 16 
 Blind Sample ID = 50171-50173  Mean = 0.04 
 % Relative Standard Deviation = 47.3 
 Number of Observations = 8 
 Blind Sample ID = 25213-75211  Mean = 0.03 
 % Relative Standard Deviation = 24.4 
 Number of Observations = 8 
 Blind Sample ID = 25211-75209  Mean = 0.03 
 % Relative Standard Deviation = 22.7 
 Number of Observations = 8 
 Blind Sample ID = 25209-75213  Mean = 0.05 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 0.02 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 0.02 
 % Relative Standard Deviation = 12.9 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 0.03 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 8 
 Blind Sample ID = 25205-75201  Mean = 0.04 
 % Relative Standard Deviation = 8.8 
 Number of Observations = 8 
 Blind Sample ID = 25203-75205  Mean = 0.04 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 0.05 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 8 
 Blind Sample ID = 25201-75197  Mean = 0.04 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 8 
 Blind Sample ID = 25197-75199  Mean = 0.04 
 % Relative Standard Deviation = 35.0 
 Number of Observations = 15 
 Blind Sample ID = 25195-75197  Mean = 0.04 
 % Relative Standard Deviation = 28.5 
 Number of Observations = 12 
 Blind Sample ID = 25193-75195  Mean = 0.02 
 % Relative Standard Deviation = 85.6 
 Number of Observations = 12 
 Blind Sample ID = 25191-75193  Mean = 0.02 
 % Relative Standard Deviation = 10.4 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 0.04 
 % Relative Standard Deviation = 36.9 
 Number of Observations = 16 
 Blind Sample ID = 25181-75179  Mean = 0.05 
 % Relative Standard Deviation = 15.3 
 Number of Observations = 16 
 Blind Sample ID = 25179-75183  Mean = 0.08 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 16 
 Blind Sample ID = 25179-75177  Mean = 0.08 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 23 
 Blind Sample ID = 25177-75175  Mean = 0.05 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 20 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Mercury, UNF,CVAF -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 71900, MCode: CV018
Dates: 10/19/04 through 08/11/22
Open Data Set

 Mean = 0.02 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 4 
 Blind Sample ID = T243  Mean = 0.04 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 4 
 Blind Sample ID = T241  Mean = 0.04 
 % Relative Standard Deviation = 44.9 
 Number of Observations = 8 
 Blind Sample ID = T239  Mean = 0.03 
 % Relative Standard Deviation = 50.4 
 Number of Observations = 6 
 Blind Sample ID = T237  Mean = 0.02 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 7 
 Blind Sample ID = T235  Mean = 0.04 
 % Relative Standard Deviation = 14.7 
 Number of Observations = 10 
 Blind Sample ID = T233  Mean = 0.03 
 % Relative Standard Deviation = 47.9 
 Number of Observations = 10 
 Blind Sample ID = T231  Mean = 0.03 
 % Relative Standard Deviation = 23.4 
 Number of Observations = 7 
 Blind Sample ID = T229  Mean = 0.03 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 6 
 Blind Sample ID = T227  Mean = 0.02 
 % Relative Standard Deviation = 12.8 
 Number of Observations = 6 
 Blind Sample ID = T225  Mean = 0.04 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 11 
 Blind Sample ID = T223  Mean = 0.02 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 12 
 Blind Sample ID = T221  Mean = 0.04 
 % Relative Standard Deviation = 26.5 
 Number of Observations = 16 
 Blind Sample ID = T219  Mean = 0.04 
 % Relative Standard Deviation = 53.0 
 Number of Observations = 15 
 Blind Sample ID = T217  Mean = 0.05 
 % Relative Standard Deviation = 29.4 
 Number of Observations = 12 
 Blind Sample ID = T215  Mean = 0.05 
 % Relative Standard Deviation = 27.5 
 Number of Observations = 12 
 Blind Sample ID = T211  Mean = 0.05 
 % Relative Standard Deviation = 34.3 
 Number of Observations = 8 
 Blind Sample ID = T209  Mean = 0.06 
 % Relative Standard Deviation = 21.7 
 Number of Observations = 18 
 Blind Sample ID = 75213-25DIW  Mean = 0.05 
 % Relative Standard Deviation = 31.7 
 Number of Observations = 8 
 Blind Sample ID = 75211-25DIW  Mean = 0.03 
 % Relative Standard Deviation = 39.3 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 0.05 
 % Relative Standard Deviation = 6.9 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 0.01 
 % Relative Standard Deviation = 12.0 
 Number of Observations = 17 
 Blind Sample ID = 75205-25DIW  Mean = 0.01 
 % Relative Standard Deviation = 7.6 
 Number of Observations = 8 
 Blind Sample ID = 75203-25DIW  Mean = 0.04 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 28 
 Blind Sample ID = 75201-25DIW  Mean = 0.03 
 % Relative Standard Deviation = 9.0 
 Number of Observations = 12 
 Blind Sample ID = 75199-25201  Mean = 0.04 
 % Relative Standard Deviation = 27.8 
 Number of Observations = 40 
 Blind Sample ID = 75197-25DIW  Mean = 0.03 
 % Relative Standard Deviation = 11.8 
 Number of Observations = 11 
 Blind Sample ID = 75195-25197  Mean = 0.03 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 30 
 Blind Sample ID = 75193-25DIW  Mean = 0.04 
 % Relative Standard Deviation = 31.7 
 Number of Observations = 12 
 Blind Sample ID = 75193-25197  Mean = 0.02 
 % Relative Standard Deviation = 65.0 
 Number of Observations = 35 
 Blind Sample ID = 75191-25DIW  Mean = 0.02 
 % Relative Standard Deviation = 52.3 
 Number of Observations = 36 
 Blind Sample ID = 75189-25DIW  Mean = 0.02 
 % Relative Standard Deviation = 53.0 
 Number of Observations = 12 
 Blind Sample ID = 75189-25193  Mean = 0.02 
 % Relative Standard Deviation = 53.6 
 Number of Observations = 14 
 Blind Sample ID = 75189-25191  Mean = 0.02 
 % Relative Standard Deviation = 49.2 
 Number of Observations = 34 
 Blind Sample ID = 75187-25DIW  Mean = 0.02 
 % Relative Standard Deviation = 53.0 
 Number of Observations = 16 
 Blind Sample ID = 75185-25DIW  Mean = 0.02 
 % Relative Standard Deviation = 20.6 
 Number of Observations = 28 
 Blind Sample ID = 75183-25DIW  Mean = 0.04 
 % Relative Standard Deviation = 40.2 
 Number of Observations = 16 
 Blind Sample ID = 75181-25DIW  Mean = 0.05 
 % Relative Standard Deviation = 31.8 
 Number of Observations = 29 
 Blind Sample ID = 75179-25DIW  Mean = 0.06 
 % Relative Standard Deviation = 28.2 
 Number of Observations = 16 
 Blind Sample ID = 75175-25DIW  Mean = 0.02 
 % Relative Standard Deviation = 65.0 
 Number of Observations = 20 
 Blind Sample ID = 50187-50191  Mean = 0.02 
 % Relative Standard Deviation = 42.2 
 Number of Observations = 16 
 Blind Sample ID = 50187-50189  Mean = 0.02 
 % Relative Standard Deviation = 30.2 
 Number of Observations = 12 
 Blind Sample ID = 50187-50183  Mean = 0.03 
 % Relative Standard Deviation = 18.6 
 Number of Observations = 11 
 Blind Sample ID = 50185-50187  Mean = 0.02 
 % Relative Standard Deviation = 54.8 
 Number of Observations = 12 
 Blind Sample ID = 50183-50185  Mean = 0.05 
 % Relative Standard Deviation = 52.4 
 Number of Observations = 16 
 Blind Sample ID = 50177-50179  Mean = 0.05 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 14 
 Blind Sample ID = 50175-50DIW  Mean = 0.04 
 % Relative Standard Deviation = 25.1 
 Number of Observations = 19 
 Blind Sample ID = 50175-50173  Mean = 0.05 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 20 
 Blind Sample ID = 50173-50DIW  Mean = 0.03 
 % Relative Standard Deviation = 35.6 
 Number of Observations = 12 
 Blind Sample ID = 50171-50DIW  Mean = 0.04 
 % Relative Standard Deviation = 6.7 
 Number of Observations = 16 
 Blind Sample ID = 50171-50173  Mean = 0.04 
 % Relative Standard Deviation = 45.2 
 Number of Observations = 8 
 Blind Sample ID = 25213-75211  Mean = 0.03 
 % Relative Standard Deviation = 19.7 
 Number of Observations = 8 
 Blind Sample ID = 25211-75209  Mean = 0.03 
 % Relative Standard Deviation = 22.3 
 Number of Observations = 8 
 Blind Sample ID = 25209-75213  Mean = 0.05 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 0.02 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 0.01 
 % Relative Standard Deviation = 8.9 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 0.03 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 12 
 Blind Sample ID = 25205-75201  Mean = 0.04 
 % Relative Standard Deviation = 9.9 
 Number of Observations = 8 
 Blind Sample ID = 25203-75205  Mean = 0.04 
 % Relative Standard Deviation = 7.4 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 0.05 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 16 
 Blind Sample ID = 25201-75197  Mean = 0.06 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 4 
 Blind Sample ID = 25199-75201  Mean = 0.04 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 12 
 Blind Sample ID = 25197-75199  Mean = 0.04 
 % Relative Standard Deviation = 37.0 
 Number of Observations = 16 
 Blind Sample ID = 25195-75197  Mean = 0.04 
 % Relative Standard Deviation = 29.6 
 Number of Observations = 12 
 Blind Sample ID = 25193-75195  Mean = 0.02 
 % Relative Standard Deviation = 80.0 
 Number of Observations = 12 
 Blind Sample ID = 25191-75193  Mean = 0.02 
 % Relative Standard Deviation = 10.0 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 0.04 
 % Relative Standard Deviation = 32.9 
 Number of Observations = 16 
 Blind Sample ID = 25181-75179  Mean = 0.06 
 % Relative Standard Deviation = 14.8 
 Number of Observations = 16 
 Blind Sample ID = 25179-75183  Mean = 0.08 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 16 
 Blind Sample ID = 25179-75177  Mean = 0.08 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 22 
 Blind Sample ID = 25177-75175  Mean = 0.05 
 % Relative Standard Deviation = 11.2 
 Number of Observations = 20 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Molybdenum, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01060, MCode: PLM43
Dates: 10/13/04 through 09/29/22
Open Data Set

 Mean = 1.62 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 10 
 Blind Sample ID = T243  Mean = 0.53 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 2.53 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 2.03 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 0.25 
 % Relative Standard Deviation = 8.0 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 3.80 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 45 
 Blind Sample ID = T233  Mean = 0.74 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 11.53 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 0.25 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 37 
 Blind Sample ID = T227  Mean = 1.82 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 0.49 
 % Relative Standard Deviation = 4.9 
 Number of Observations = 47 
 Blind Sample ID = T223  Mean = 0.53 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 46 
 Blind Sample ID = T221  Mean = 2.78 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 42 
 Blind Sample ID = T219  Mean = 2.13 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 41 
 Blind Sample ID = T217  Mean = 1.64 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 28 
 Blind Sample ID = T215  Mean = 1.14 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 31 
 Blind Sample ID = T211  Mean = 0.64 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 15 
 Blind Sample ID = T209  Mean = 13.76 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 34 
 Blind Sample ID = 75213-25DIW  Mean = 0.84 
 % Relative Standard Deviation = 2.1 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 0.47 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 26 
 Blind Sample ID = 75209-25DIW  Mean = 3.61 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 0.76 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 33 
 Blind Sample ID = 75205-25DIW  Mean = 3.17 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 24.56 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 43 
 Blind Sample ID = 75201-25DIW  Mean = 8.19 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 0.59 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 1.17 
 % Relative Standard Deviation = 53.1 
 Number of Observations = 19 
 Blind Sample ID = 75195-25197  Mean = 2.12 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 2.35 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 34.17 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW  Mean = 1.87 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 48 
 Blind Sample ID = 75189-25DIW  Mean = 2.64 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 20 
 Blind Sample ID = 75189-25193  Mean = 13.76 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 24 
 Blind Sample ID = 75189-25191  Mean = 0.34 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 41 
 Blind Sample ID = 75187-25DIW  Mean = 0.95 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 23 
 Blind Sample ID = 75185-25DIW  Mean = 1.53 
 % Relative Standard Deviation = 17.6 
 Number of Observations = 41 
 Blind Sample ID = 75183-25DIW  Mean = 3.21 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 19 
 Blind Sample ID = 75181-25DIW  Mean = 1.60 
 % Relative Standard Deviation = 11.9 
 Number of Observations = 52 
 Blind Sample ID = 75179-25DIW  Mean = 1.30 
 % Relative Standard Deviation = 9.2 
 Number of Observations = 27 
 Blind Sample ID = 75175-25DIW  Mean = 22.65 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 19 
 Blind Sample ID = 50187-50191  Mean = 1.45 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 15 
 Blind Sample ID = 50187-50189  Mean = 1.25 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 24 
 Blind Sample ID = 50187-50183  Mean = 0.84 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 20 
 Blind Sample ID = 50185-50187  Mean = 1.66 
 % Relative Standard Deviation = 26.9 
 Number of Observations = 19 
 Blind Sample ID = 50183-50185  Mean = 3.05 
 % Relative Standard Deviation = 13.4 
 Number of Observations = 26 
 Blind Sample ID = 50177-50179  Mean = 0.90 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 46 
 Blind Sample ID = 50175-50DIW  Mean = 4.61 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 3.72 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 28 
 Blind Sample ID = 50173-50DIW  Mean = 0.97 
 % Relative Standard Deviation = 4.6 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 4.70 
 % Relative Standard Deviation = 4.4 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 5.36 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 14 
 Blind Sample ID = 25213-75211  Mean = 0.77 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 16 
 Blind Sample ID = 25211-75209  Mean = 14.02 
 % Relative Standard Deviation = 2.3 
 Number of Observations = 14 
 Blind Sample ID = 25209-75213  Mean = 3.79 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 13 
 Blind Sample ID = 25209-75207  Mean = 1.98 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 13 
 Blind Sample ID = 25207-75205  Mean = 0.73 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 14 
 Blind Sample ID = 25205-75209  Mean = 24.61 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 20 
 Blind Sample ID = 25205-75201  Mean = 1.84 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 16 
 Blind Sample ID = 25203-75205  Mean = 11.17 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 16 
 Blind Sample ID = 25201-75203  Mean = 8.78 
 % Relative Standard Deviation = 3.1 
 Number of Observations = 23 
 Blind Sample ID = 25201-75197  Mean = 24.03 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 12 
 Blind Sample ID = 25199-75201  Mean = 0.45 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 20 
 Blind Sample ID = 25197-75199  Mean = 0.86 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 24 
 Blind Sample ID = 25195-75197  Mean = 1.55 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 20 
 Blind Sample ID = 25193-75195  Mean = 13.58 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 20 
 Blind Sample ID = 25191-75193  Mean = 4.03 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 15 
 Blind Sample ID = 25183-75181  Mean = 2.67 
 % Relative Standard Deviation = 15.2 
 Number of Observations = 23 
 Blind Sample ID = 25181-75179  Mean = 2.18 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 22 
 Blind Sample ID = 25179-75183  Mean = 3.63 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 28 
 Blind Sample ID = 25179-75177  Mean = 2.27 
 % Relative Standard Deviation = 13.8 
 Number of Observations = 35 
 Blind Sample ID = 25177-75175  Mean = 1.81 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Molybdenum, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01062, MCode: PLM48
Dates: 10/26/05 through 04/30/15
Open Data Set

 Mean = 13.72 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 4 
 Blind Sample ID = 75213-25DIW  Mean = 0.85 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 0.48 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 14 
 Blind Sample ID = 75209-25DIW  Mean = 3.66 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 8 
 Blind Sample ID = 75207-25DIW  Mean = 0.75 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 13 
 Blind Sample ID = 75205-25DIW  Mean = 3.05 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 75203-25DIW  Mean = 23.34 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 16 
 Blind Sample ID = 75201-25DIW  Mean = 8.15 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 8 
 Blind Sample ID = 75199-25201  Mean = 0.56 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 24 
 Blind Sample ID = 75197-25DIW  Mean = 1.01 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 8 
 Blind Sample ID = 75195-25197  Mean = 2.12 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 16 
 Blind Sample ID = 75193-25DIW  Mean = 2.34 
 % Relative Standard Deviation = 2.6 
 Number of Observations = 8 
 Blind Sample ID = 75193-25197  Mean = 33.99 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 16 
 Blind Sample ID = 75191-25DIW  Mean = 1.87 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 16 
 Blind Sample ID = 75189-25DIW  Mean = 2.55 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 8 
 Blind Sample ID = 75189-25193  Mean = 13.70 
 % Relative Standard Deviation = 1.7 
 Number of Observations = 8 
 Blind Sample ID = 75189-25191  Mean = 0.35 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 15 
 Blind Sample ID = 75187-25DIW  Mean = 0.95 
 % Relative Standard Deviation = 2.2 
 Number of Observations = 8 
 Blind Sample ID = 75185-25DIW  Mean = 1.58 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 15 
 Blind Sample ID = 75183-25DIW  Mean = 3.48 
 % Relative Standard Deviation = 1.3 
 Number of Observations = 8 
 Blind Sample ID = 75181-25DIW  Mean = 1.66 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 21 
 Blind Sample ID = 75179-25DIW  Mean = 1.35 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 15 
 Blind Sample ID = 75175-25DIW  Mean = 23.77 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 8 
 Blind Sample ID = 50187-50191  Mean = 1.50 
 % Relative Standard Deviation = 3.0 
 Number of Observations = 7 
 Blind Sample ID = 50187-50189  Mean = 1.29 
 % Relative Standard Deviation = 2.8 
 Number of Observations = 8 
 Blind Sample ID = 50187-50183  Mean = 0.88 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 8 
 Blind Sample ID = 50185-50187  Mean = 1.69 
 % Relative Standard Deviation = 2.7 
 Number of Observations = 8 
 Blind Sample ID = 50183-50185  Mean = 3.25 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 16 
 Blind Sample ID = 50177-50179  Mean = 0.91 
 % Relative Standard Deviation = 1.9 
 Number of Observations = 15 
 Blind Sample ID = 50175-50DIW  Mean = 5.38 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 5 
 Blind Sample ID = 25213-75211  Mean = 0.77 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 14.15 
 % Relative Standard Deviation = 3.3 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213  Mean = 3.91 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 8 
 Blind Sample ID = 25209-75207  Mean = 2.01 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 8 
 Blind Sample ID = 25207-75205  Mean = 0.74 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 8 
 Blind Sample ID = 25205-75209  Mean = 24.31 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 8 
 Blind Sample ID = 25205-75201  Mean = 1.83 
 % Relative Standard Deviation = 4.0 
 Number of Observations = 8 
 Blind Sample ID = 25203-75205  Mean = 11.02 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 8 
 Blind Sample ID = 25201-75203  Mean = 8.54 
 % Relative Standard Deviation = 0.7 
 Number of Observations = 8 
 Blind Sample ID = 25201-75197  Mean = 0.45 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 8 
 Blind Sample ID = 25197-75199  Mean = 0.89 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 8 
 Blind Sample ID = 25195-75197  Mean = 1.47 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 8 
 Blind Sample ID = 25193-75195  Mean = 13.71 
 % Relative Standard Deviation = 1.8 
 Number of Observations = 8 
 Blind Sample ID = 25191-75193  Mean = 3.95 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 7 
 Blind Sample ID = 25183-75181  Mean = 2.84 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 8 
 Blind Sample ID = 25181-75179  Mean = 2.12 
 % Relative Standard Deviation = 2.0 
 Number of Observations = 8 
 Blind Sample ID = 25179-75183  Mean = 3.69 
 % Relative Standard Deviation = 2.5 
 Number of Observations = 16 
 Blind Sample ID = 25179-75177  Mean = 2.37 
 % Relative Standard Deviation = 1.6 
 Number of Observations = 16 
 Blind Sample ID = 25177-75175
The SGPlot Procedure



- Molybdenum, UNF, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01062, MCode: PLM78
Dates: 05/12/15 through 08/26/22
Open Data Set

 Mean = 1.51 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 6 
 Blind Sample ID = T243  Mean = 0.53 
 % Relative Standard Deviation = 2.9 
 Number of Observations = 8 
 Blind Sample ID = T241  Mean = 2.43 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 14 
 Blind Sample ID = T239  Mean = 1.98 
 % Relative Standard Deviation = 4.7 
 Number of Observations = 14 
 Blind Sample ID = T237  Mean = 0.25 
 % Relative Standard Deviation = 7.2 
 Number of Observations = 22 
 Blind Sample ID = T235  Mean = 3.75 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 23 
 Blind Sample ID = T233  Mean = 0.74 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 21 
 Blind Sample ID = T231  Mean = 11.36 
 % Relative Standard Deviation = 5.2 
 Number of Observations = 21 
 Blind Sample ID = T229  Mean = 0.25 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 23 
 Blind Sample ID = T227  Mean = 1.85 
 % Relative Standard Deviation = 4.8 
 Number of Observations = 22 
 Blind Sample ID = T225  Mean = 0.50 
 % Relative Standard Deviation = 6.2 
 Number of Observations = 21 
 Blind Sample ID = T223  Mean = 0.54 
 % Relative Standard Deviation = 5.1 
 Number of Observations = 22 
 Blind Sample ID = T221  Mean = 2.78 
 % Relative Standard Deviation = 6.6 
 Number of Observations = 23 
 Blind Sample ID = T219  Mean = 2.15 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 24 
 Blind Sample ID = T217  Mean = 1.63 
 % Relative Standard Deviation = 3.4 
 Number of Observations = 16 
 Blind Sample ID = T215  Mean = 1.15 
 % Relative Standard Deviation = 3.6 
 Number of Observations = 16 
 Blind Sample ID = T211  Mean = 0.63 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 7 
 Blind Sample ID = T209  Mean = 13.56 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 14 
 Blind Sample ID = 75213-25DIW  Mean = 0.84 
 % Relative Standard Deviation = 2.4 
 Number of Observations = 4 
 Blind Sample ID = 75211-25DIW  Mean = 5.48 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 3 
 Blind Sample ID = 25213-75211  Mean = 0.78 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 4 
 Blind Sample ID = 25211-75209  Mean = 14.36 
 % Relative Standard Deviation = 3.9 
 Number of Observations = 4 
 Blind Sample ID = 25209-75213
The SGPlot Procedure



- Monomethylarsonate (MMA), IC-ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 62454, MCode: PLM35
Dates: 11/16/04 through 10/12/07
Open Data Set

 Mean = 9.33 
 % Relative Standard Deviation = 4.3 
 Number of Observations = 18 
 Blind Sample ID = AS6  Mean = 12.63 
 % Relative Standard Deviation = 4.5 
 Number of Observations = 47 
 Blind Sample ID = AS4
The SGPlot Procedure



- Nickel, FIL, ICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01065, MCode: PLM43
Dates: 10/13/04 through 07/19/06
Open Data Set

 Mean = 1.46 
 % Relative Standard Deviation = 20.0 
 Number of Observations = 16 
 Blind Sample ID = 75179-25DIW  Mean = 2.60 
 % Relative Standard Deviation = 5.9 
 Number of Observations = 12 
 Blind Sample ID = 75175-25DIW  Mean = 2.65 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 10 
 Blind Sample ID = 50177-50179  Mean = 1.74 
 % Relative Standard Deviation = 8.4 
 Number of Observations = 35 
 Blind Sample ID = 50175-50DIW  Mean = 4.65 
 % Relative Standard Deviation = 5.8 
 Number of Observations = 20 
 Blind Sample ID = 50175-50173  Mean = 2.88 
 % Relative Standard Deviation = 10.1 
 Number of Observations = 23 
 Blind Sample ID = 50173-50DIW  Mean = 2.94 
 % Relative Standard Deviation = 6.3 
 Number of Observations = 24 
 Blind Sample ID = 50171-50DIW  Mean = 5.90 
 % Relative Standard Deviation = 6.4 
 Number of Observations = 20 
 Blind Sample ID = 50171-50173  Mean = 3.65 
 % Relative Standard Deviation = 15.3 
 Number of Observations = 11 
 Blind Sample ID = 25179-75177  Mean = 3.60 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 16 
 Blind Sample ID = 25177-75175  Mean = 3.95 
 % Relative Standard Deviation = 5.4 
 Number of Observations = 16 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Nickel, FIL, ICP-OES -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01065, MCode: PLA11
Dates: 03/03/05 through 08/30/05
Open Data Set

 Mean = 1.63 
 % Relative Standard Deviation = 20.8 
 Number of Observations = 4 
 Blind Sample ID = 50175-50DIW  Mean = 4.88 
 % Relative Standard Deviation = 16.2 
 Number of Observations = 4 
 Blind Sample ID = 50175-50173  Mean = 3.16 
 % Relative Standard Deviation = 14.1 
 Number of Observations = 4 
 Blind Sample ID = 50173-50DIW  Mean = 2.11 
 % Relative Standard Deviation = 35.1 
 Number of Observations = 4 
 Blind Sample ID = 50171-50DIW  Mean = 3.55 
 % Relative Standard Deviation = 10.8 
 Number of Observations = 8 
 Blind Sample ID = 25171-75175
The SGPlot Procedure



- Nickel, FIL, cICP-MS -
Percent Relative Standard Deviation
Lab: NWQL, PCode: 01065, MCode: PLM10
Dates: 11/15/05 through 09/29/22
Open Data Set

 Mean = 1.56 
 % Relative Standard Deviation = 6.0 
 Number of Observations = 13 
 Blind Sample ID = T243  Mean = 0.56 
 % Relative Standard Deviation = 10.6 
 Number of Observations = 13 
 Blind Sample ID = T241  Mean = 3.81 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 26 
 Blind Sample ID = T239  Mean = 1.28 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 30 
 Blind Sample ID = T237  Mean = 1.13 
 % Relative Standard Deviation = 6.1 
 Number of Observations = 46 
 Blind Sample ID = T235  Mean = 1.96 
 % Relative Standard Deviation = 5.6 
 Number of Observations = 46 
 Blind Sample ID = T233  Mean = 0.64 
 % Relative Standard Deviation = 12.2 
 Number of Observations = 37 
 Blind Sample ID = T231  Mean = 9.11 
 % Relative Standard Deviation = 3.7 
 Number of Observations = 39 
 Blind Sample ID = T229  Mean = 0.68 
 % Relative Standard Deviation = 18.4 
 Number of Observations = 40 
 Blind Sample ID = T227  Mean = 7.11 
 % Relative Standard Deviation = 5.7 
 Number of Observations = 46 
 Blind Sample ID = T225  Mean = 0.54 
 % Relative Standard Deviation = 10.7 
 Number of Observations = 47 
 Blind Sample ID = T223  Mean = 0.52 
 % Relative Standard Deviation = 18.3 
 Number of Observations = 46 
 Blind Sample ID = T221  Mean = 1.96 
 % Relative Standard Deviation = 8.7 
 Number of Observations = 33 
 Blind Sample ID = T219  Mean = 2.48 
 % Relative Standard Deviation = 10.5 
 Number of Observations = 41 
 Blind Sample ID = T217  Mean = 0.49 
 % Relative Standard Deviation = 52.2 
 Number of Observations = 25 
 Blind Sample ID = T215  Mean = 2.41 
 % Relative Standard Deviation = 9.1 
 Number of Observations = 31 
 Blind Sample ID = T211  Mean = 0.43 
 % Relative Standard Deviation = 21.4 
 Number of Observations = 16 
 Blind Sample ID = T209  Mean = 1.81 
 % Relative Standard Deviation = 9.4 
 Number of Observations = 14 
 Blind Sample ID = 75211-25DIW  Mean = 0.41 
 % Relative Standard Deviation = 20.1 
 Number of Observations = 28 
 Blind Sample ID = 75209-25DIW  Mean = 1.33 
 % Relative Standard Deviation = 9.3 
 Number of Observations = 14 
 Blind Sample ID = 75207-25DIW  Mean = 0.85 
 % Relative Standard Deviation = 6.5 
 Number of Observations = 33 
 Blind Sample ID = 75205-25DIW  Mean = 0.26 
 % Relative Standard Deviation = 55.6 
 Number of Observations = 16 
 Blind Sample ID = 75203-25DIW  Mean = 47.24 
 % Relative Standard Deviation = 3.5 
 Number of Observations = 43 
 Blind Sample ID = 75201-25DIW  Mean = 16.30 
 % Relative Standard Deviation = 3.2 
 Number of Observations = 20 
 Blind Sample ID = 75199-25201  Mean = 14.05 
 % Relative Standard Deviation = 5.0 
 Number of Observations = 56 
 Blind Sample ID = 75197-25DIW  Mean = 5.24 
 % Relative Standard Deviation = 3.8 
 Number of Observations = 18 
 Blind Sample ID = 75195-25197  Mean = 1.37 
 % Relative Standard Deviation = 7.5 
 Number of Observations = 48 
 Blind Sample ID = 75193-25DIW  Mean = 5.94 
 % Relative Standard Deviation = 4.2 
 Number of Observations = 20 
 Blind Sample ID = 75193-25197  Mean = 1.39 
 % Relative Standard Deviation = 11.0 
 Number of Observations = 47 
 Blind Sample ID = 75191-25DIW