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www.eoe dab.com f Helena, MT B77-472-0711 • Billings, MT 8010-735-4489 • Casper, WY 888-235-0515 <br />Aa OraBlMaslivca 1851 Gillette; WY A66 i66. 7175a Rapid City, SD 8811 672=1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Report Date: 09/16/10 <br />Work Order: C10080790 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> Batch: 27191 <br />Method: E245.1 <br />Sample ID: MB-27191 Method Blank Run: CVAA_C203_100824B 08/24/10 16:12 <br />Mercury ND mg/L 8E-06 <br />Sample ID: LCS-27191 Laboratory Control Sample Run: CVAA_C203_100824B 08/24/10 16:16 <br />Mercury 0.00537 mg/L 0.00010 107 90 110 <br />Sample ID: C1 0080639-001 DMS Sample Matrix Spike Run: CVAA_C203_100824B 08/24/10 16:34 <br />Mercury 0.00788 mg/L 0.00010 105 85 115 <br />Sample ID: C10080639-001DMSD Sample Matrix Spike Duplicate Run: CVAA_C203_100824B 08/24/10 16:36 <br />Mercury 0.00788 mg/L 0.00010 105 85 115 0 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 37