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ntitiw.energylat.vrn Helena, MT 877-472-0711 • Billings, MT 800-735-4489 -Casper, WY 868-235-0515 <br />,m ryrrcal frcaUenceDoes 1912 ? Gillette, WY 866-686-7115 • Rapid City, SD 888-672-1225 • College Station, TX 888-690.2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 01121111 <br />Project: Schwartzwalder Wa ter Sampling Program-Ground Water Work Order: C10120819 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E353.2 Analytical Run: SUB•B159376 <br />Sample ID: ICV Initial Calibration Verification Standard 01/03/11 10:34 <br />Nitrogen, Nitrate+Niirite as N 31.4 mg/L 0.20 107 90 110 <br />Method: E353.2 Balch: B.„.R159376 <br />Sample ID: MBLK Method Blank Run: SUB-8159376 01/03/11 10:35 <br />Nitrogen, Nilrale+Niirite as N 0.005 mglL 0.004 <br />Sample ID: LFB Laboratory Fortified Blank Run: SUB-6159376 01103/11 10:37 <br />Nitrogen, Nilrale+Nitrite as N 1.07 mg1L 0.010 109 90 110 <br />Sample ID: C10120819-001 G Sample Matrix Spike Run: SUB-8159376 01/03/11 11:32 <br />Nitrogen, Nitrate+Nitrite as N 1.09 mg/L 0.010 110 90 110 <br />Sample ID: C10120819-001G Sample Matrix Spike Duplicate Run: SUB-8159376 01/03/11 11:34 <br />Nitrogen, Nitrate+Nitrite as N 1.04 mg/L 0.010 105 90 110 4.7 10 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 17 of 25