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wwwowgylsb.com Helena, UT 877-472-0711 • Billings, AIT 888-735-4489 • Casper, WY 888-235-1515 <br />r f0i"Q1'rav Gillette, WY 156-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-688-2218 <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 RPDLtmtt Qual <br />Method: HACH 8000 Analytical Run: HACH DR3000_101006A <br />Sample ID: CCV-3 Continuing Calibration Verification Standard 10/06/10 09:36 <br />Oxygen Demand, Chemical (COD) 1000 mg/L 5.0 100 90 110 <br />Method: HACH 8000 <br />Sample ID: MBLK-1 <br />Oxygen Demand, Chemical (COD) <br />Sample ID: LCS-2 <br />Oxygen Demand, Chemical (COD) <br />Sample ID: C10100019-001DMS <br />Oxygen Demand, Chemical (COD) <br />Sample ID: C10100019-001DMSD <br />Oxygen Demand, Chemical (COD) <br />Method Blank <br />ND mg/L <br />Laboratory Control Sample <br />508 mg/L <br />Sample Matrix Spike <br />537 mg/L <br />Sample Matrix Spike Duplicate <br />537 mg/L <br />3 <br />Run: HACH DR3000_101006A <br />5.0 102 90 110 <br />Run: HACH DR3000_101006A <br />5.0 105 90 110 <br />Run: HACH DR3000_101006A <br />5.0 105 90 110 0 <br />Batch: A2010-10-06 6 COD 01 <br />Run: HACH DR3000_101006A 10/06/10 09:36 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />10/06/10 09:36 <br />10/06/10 09:38 <br />10/06/10 09:38 <br />10 <br />Page 17 of 22