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www.enerzgab.com f Helena, MY 817472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />AWOWEudnes S w 11x91 Gillette, WY 866-686-7175 • Rapid City, SD 886-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11 /29/10 <br />Project: Schwartzwalder Water Monitoring Program SW Work Order: C10101013 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E353.2 Analytical Run: SUB-6156579 <br />Sample ID: ICV Initial Calibration Verification Standard 11/03/10 09:59 <br />Nitrogen, Nitrate+Nitrite as N 29.1 mg/L 0.20 99 90 110 <br />Method: E353.2 Batch: B_R156579 <br />Sample ID: MBLK Method Blank Run: SUB-6156579 11/03/10 10:00 <br />Nitrogen, Nitrate+Nitrite as N ND mg/L 0.004 <br />Sample ID: LFB Laboratory Fortified Blank Run: SUB-B156579 11/03/10 10:01 <br />Nitrogen, Nitrate+Nitrite as N 1.01 mg/L 0.010 103 90 110 <br />Sample ID: B10102496-001AMS Sample Matrix Spike Run: SUB-B156579 11/03/10 13:07 <br />Nitrogen, Nitrate+Nitrite as N 1.27 mg/L 0.010 104 90 110 <br />Sample ID: B10102496-001AMSD Sample Matrix Spike Duplicate Run: SUB-B156579 11/03/10 13:09 <br />Nitrogen, Nitrate+Nitrite as N 1.27 mg/L 0.010 103 90 110 0.3 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 21 of 32