2021-05-18_HYDROLOGY - C1981019

• Permit No: C1981019
• IBM Index Class Name: Hydrology
• Doc Date: 5/18/2021
• Doc Name: Correspondence
• From: Tri-State Generation and Transmission Association, Inc.
• To: DRMS
• Email Name: ZTT
• Email Name: JDM
• Media Type: D
• Archive: No

DocuSign Envelope ID: D07924E6-3D94-4398-AO66-B683COBAB33E
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Stantec(CO)
3325 S.Timberline Road-#150 Work Order: XOK0424
Fort Collins,CO 80525 Reported: 11-Dec-20 12:10
Quality Control-DUPLICATE Data
Duplicate Sample RPD
Method Analyte Units Result Result RPD Limit Batch and Source ID Analyzed Notes
Classical Chemistry Parameters
SM 2320 B Total Alkalinity mg/L as CaCO3 1060 1070 0.8 20 X048185-XOK0424-01 25-Nov-20
SM 2320 B Bicarbonate mg/L as CaCO3 988 999 1.0 20 X048185-XOK0424-01 25-Nov-20
SM 2320 B Carbonate mg/L as CaCO3 70.6 69.4 1.7 20 X048185-XOK0424-01 25-Nov-20
SM 4500-P-E Phosphorus mg/L 0.0571 0.0556 2.7 20 X050091-XOK0427-04 09-Dec-20
Quality Control-MATRIX SPIKE Data
Spike Sample Spike % Acceptance
Method Analyte Units Result Result(R) Level(S) Rec. Limits Batch and Source ID Analyzed Notes
Metals(Dissolved)
EPA 200.7 Calcium mg/L 72.0 55.8 20.0 80.8 70-130 X048164-XOK0409-01 07-Dec-20
EPA 200.7 Calcium mg/L 147 133 20.0 72.7 70-130 X048164-XOK0424-05 07-Dec-20
EPA 200.7 Magnesium mg/L 48.0 30.1 20.0 89.5 70-130 X048164-XOK0409-01 07-Dec-20
EPA 200.7 Magnesium mg/L 134 119 20.0 74.7 70-130 X048164-XOK0424-05 07-Dec-20
EPA 200.7 Manganese mg/L 1.03 <0.0080 1.00 103 70-130 X048164-XOK0409-01 07-Dec-20
EPA 200.7 Manganese mg/L 0.997 <0.0080 1.00 99.7 70-130 X048164-XOK0424-05 07-Dec-20
EPA 200.7 Sodium mg/L 36.5 18.0 19.0 97.2 70-130 X048164-XOK0409-01 07-Dec-20
EPA 200.7 Sodium mg/L 740 764 19.0 0.30R>S 70-130 X048164-XOK0424-05 07-Dec-20 M3
EPA 200.8 Iron mg/L 0.202 <0.020 0.195 93.9 70-130 X049041-XOK0424-01 08-Dec-20
Classical Chemistry Parameters
EPA 350.1 Ammonia as N mg/L 1.02 <0.030 1.00 102 90-110 X048193-XOK0371-01 03-Dec-20
EPA 350.1 Ammonia as N mg/L 1.01 <0.030 1.00 101 90-110 X048193-XOK0371-02 03-Dec-20
SM 4500-P-E Phosphorus mg/L 0.568 0.0556 0.500 103 75-125 X050091-XOK0427-04 09-Dec-20
Dissolved Classical Chemistry Parameters
SM 5310B Dissolved Organic mg/L 10.9 <1.00 10.0 101 80-120 X049020-XOK0392-02 30-Nov-20
Carbon
Anions by Ion Chromatography
EPA 300.0 Chloride mg/L 17.6 15.0 3.00 0.30R>S 90-110 X048187-XOK0429-01 25-Nov-20 D2,M4
EPA 300.0 Nitrate as N mg/L 16.6 14.8 2.00 0.30R>S 90-110 X048187-XOK0429-01 25-Nov-20 D2,M4
EPA 300.0 Sulfate as SO4 mg/L 97.8 89.2 10.0 0.30R>S 90-110 X048187-XOK0429-01 25-Nov-20 D2,M4
Quality Control-MATRIX SPIKE DUPLICATE Data
MSD Spike Spike RPD
Method Analyte Units Result Result Level RPD Limit %Recovery Batch and Source ID Notes
Metals(Dissolved)
EPA 200.7 Calcium mg/L 73.2 72.0 20.0 1.7 20 87.0 X048164-XOK0409-01
EPA 200.7 Magnesium mg/L 48.8 48.0 20.0 1.7 20 93.6 X048164-XOK0409-01
EPA 200.7 Manganese mg/L 1.05 1.03 1.00 1.9 20 105 X048164-XOK0409-01
EPA 200.7 Sodium mg/L 37.1 36.5 19.0 1.7 20 100 X048164-XOK0409-01
EPA 200.8 Iron mg/L 0.204 0.202 0.195 1.0 20 94.9 X049041-XOK0424-01
Classical Chemistry Parameters
EPA 350.1 Ammonia as N mg/L 0.997 1.02 1.00 2.4 20 99.7 X048193-XOK0371-01
SM 4500-P-E Phosphorus mg/L 0.568 0.568 0.500 0.0 20 103 X050091-XOK0427-04
Dissolved Classical Chemistry Parameters
SM 5310B Dissolved Organic mg/L 10.8 10.9 10.0 1.8 20 99.3 X049020-XOK0392-02
Carbon
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