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www-ene eab.eom <br />//sbfkd=FyC11111aR581p f!!11 <br />572-0711 • Billings, AtT 801-735-4189 • Casper, WY 853-235-1515 <br />*'Rapid' I <br />id City; So 818-9124225 • College Station' a a ad-619-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 12/28/10 <br />Project: Schwartzwalder Mine Monitoring Program-Discharge Work Order: C10110835 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: HACH 8000 Analytical Run: HACH DR3000_101202B <br />Sample ID: CCV-3 Continuing Calibration Verification Standard 12/02/10 09:51 <br />Oxygen Demand, Chemical (COD) 1000 mg/L 5.0 100 90 110 <br />Method: HACH 8000 <br />Sample ID: MBLK-1 Method Blank <br />Oxygen Demand, Chemical (COD) ND mg/L <br />Sample ID: LCS-2 Laboratory Control Sample <br />Oxygen Demand, Chemical (COD) 510 mg/L <br />Sample ID: 010120028-001DMS Sample Matrix Spike <br />Oxygen Demand, Chemical (COD) 568 mg/L <br />Sample ID: C10120028-001DMSD Sample Matrix Spike Duplicate <br />Oxygen Demand, Chemical (COD) 564 mg/L <br />Batch: A2010-12-02_6_COD_01 <br />Run: HACH DR3000 101202B 12/02/10 09:50 <br />3 <br />Run: HACH DR3000_101202B 12/02/10 09:51 <br />5.0 102 90 110 <br />Run: HACH DR3000 101202B 12/02/10 09:52 <br />5.0 106 90 110 <br />Run: HACH DR3000_101202B 12/02/10 09:53 <br />5.0 105 90 110 0.7 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 18 of 23 <br />