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www.erwdeb.com Helena, Mr 0714724711 • Billings, MT 600-7354469 • Casper, WY 080-2354515 <br />Ass !lalF SrSu litSt Gillette, WY 066-086-7175 • Rapid City, SO 088-672-1225 • College Station, TX 800-600-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11/05/10 <br />Project: Schwartzwalder Water Monitoring Program Discharge Work Order: C10100100 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: D2036 Batch: B_R155070 <br />Sample ID: 810100274-005SMS Sample Matrix Spike Run: SUB-B155070 10/06/10 09:21 <br />Cyanide, Weak Acid Dissociable 0.104 mg/L 0.0050 104 80 120 <br />Sample ID: B10100274-005BMSD Sample Matrix Spike Duplicate Run: SUB-B155070 10/06/10 09:23 <br />Cyanide, Weak Acid Dissociable 0.105 mg/L 0.0050 105 80 120 1.2 10 <br />Sample ID: MB-49404 Method Blank Run: SUB-B155070 10/06/10 09:36 <br />Cyanide, Weak Acid Dissociable ND mg/L 0.002 <br />Sample ID: LFB Laboratory Fortified Blank Run: SUB-B155070 10/06/10 09:15 <br />Cyanide, Weak Acid Dissociable 0.105 mg/L 0.0050 105 90 110 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 10 of 22