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wwwinerglf a5.cem <br />Aa*W IM <br />11 Billings, W 800-735-4489 a Casper, WY 888-235-0515 <br />id City, SO 808-671-1225 • College Station, TX 888-690-2211 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 12/17/10 <br />Project: Schwartzwalder Water Monitoring Program-Discharge Work Order: C10110468 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: A3500 Cr-B Analytical Run: HACH DR3000_101111 C <br />Sample ID: CCV-3 Continuing Calibration Verification Standard 11/11/10 15:30 <br />Chromium, Hexavalent 0.104 mg/L 0.010 104 90 110 <br />Method: A3500 Cr-B Batch: A2010-11-11_6_CR_01 <br />Sample ID: MBLK-1 Method Blank Run: HACH DR3000_101111C 11/11/10 15:30 <br />Chromium, Hexavalent ND mg/L 0.007 <br />Sample ID: LCS-2 Laboratory Control Sample Run: HACH DR3000_101111C 11/11/10 15:30 <br />Chromium, Hexavalent 0.0957 mg/L 0.010 96 90 110 <br />Sample ID: C1 0110468-001 BMS Sample Matrix Spike Run: HACH DR3000_101111C 11/11/10 15:31 <br />Chromium, Hexavalent 0.0971 mg/L 0.010 99 80 120 <br />Sample ID: C10110468-001BMSD Sample Matrix Spike Duplicate Run: HACH DR3000_101111C 11/11/10 15:31 <br />Chromium, Hexavalent 0.0984 mg/L 0.010 100 80 120 1.3 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 7 of 23 <br />