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....... _ __. <br />.' www.energyiab.com Helena, MT 877-472-0711 • Billings MT 800-135-4489 • Casper, WY 868-235-0515 <br />- . - • . - -?F"' w A'urytica/frcatlenceSir= 1952 Gillette, WY 666-686-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2216 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 09/16/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: C10080658 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual j <br />Method: E353.2 Analytical Run: SUB-B152778 <br />Sample ID: ICV Initial Calibration Verification Standard 08/24/10 08:37 <br />Nitrogen, Nitrate+Nitrite as N 29.6 mg/L 0.20 101 90 110 <br />Method: E353.2 Batch: B_R152778 <br />Sample ID: MBLK Method Blank Run: SUB-B152778 08/24/10 08:38 <br />Nitrogen, Nitrate+Nitrite as N ND mg/L 0.01 <br />Sample ID: LFB Laboratory Fortified Blank Run: SUB-6152778 08/24/10 08:39 <br />Nitrogen, Nitrate+Nitrite as N 1.03 mg/L 0.010 105 90 110 <br />Sample ID: 810081811-002EMS Sample Matrix Spike Run: SUB-6152778 08/24/10 09:02 <br />Nitrogen, Nitrate+Nitrite as N 1.13 mg/L 0.010 106 90 110 <br />Sample ID: 810081811-002EMSD Sample Matrix Spike Duplicate Run: SUB-6152778 08/24/10 09:03 <br />Nitrogen, Nitrate+Nitrite as N 1.14 mg/L 0.010 106 90 110 0.8 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