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www.energylab.com f Helena, MT 877-472-0711 i Billings, MT 800-7354489 . Casper, W 888-235-0515 <br />Ana"calfrcaftwoSincs 125.2 ?I Gillette, WY 866-686-7175 a Rapid City, SD 888-672-1225 Y College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 01/05/11 <br />Project: Schwartzwalder Mine Monitoring Program-Suriace Wat Work Order: C10110787 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E353.2 Analytical Run: SUB-6157938 <br />Sample ID: ICV Initial Calibration Verification Sta ndard 12/02/10 09:36 <br />Nitrogen, Nitrate+Nitrite as N 30.6 mg/L 0.20 104 90 110 <br />Method: E353.2 Balch: E R157938 <br />Sample ID: MBLK Method Blank Run: SUB-8157938 12/02/10 09:37 <br />Nitrogen, Nilrale+Nitrite as N ND mg/L 0.004 <br />Sample ID: LFB Laboratory Fortified Blank Run: SUB-6157938 12/02/10 09:39 <br />Nitrogen, Nitrate+Nitrite as N 1.04 mg/L 0.010 107 90 110 <br />Sample ID: 810111908-OO1AMS Sample Matrix Spike Run: SUB-6157938 12/02/10 10:01 <br />Nitrogen, Nitrate+Nitrite as N 1.78 mg/L 0.010 108 90 110 <br />Sample ID: 810111908-001AMSD Sample Matrix Spike Duplicate Run: SUB-B157938 12/02/10 10:02 <br />Nitrogen, Nitrate+Nitrite as N 1.78 mg/L 0.010 107 90 110 0.6 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 20 of 30