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www.energylab.com Helena, MT 877-472-0711 * Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />Anaryffcs/fxcs#-Skim 1952 Gillette, WY 866-686-7175 • Rapid City, SD 88B-672-1225 * College Steffen, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 01/24/11 <br />Project: Schwartzwalder Water Sampling Program Discharge Work Order: C10120395 <br />Analyte Co unt Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E245.1 Batch: 28516 <br />Sample ID: MB-28516 Method Blank Run: CVAA_C203_101215A 12/15/10 08:20 <br />Mercury ND mg/L 8E-06 <br />Sample ID: LCS-28516 Laboratory Control Sample Run: CVAA_C203_101215A 12/15/10 08:25 <br />Mercury 0.00514 mg/L 0.00010 103 90 110 <br />Sample ID: C10120308-001 BMS Sample Matrix Spike Run: CVAA_C203_101215A 12/15/10 08:27 <br />Mercury 0.00609 mg/L 0.00020 122 85 115 S <br />Sample ID: C10120308-001BMSD Sample Matrix Spike Duplicate Run: CVAA_C203_101215A 12/15/10 08:29 <br />Mercury 0.00606 mg/L 0.00020 121 85 115 0.5 10 S <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />S - Spike recovery outside of advisory limits. <br />Page 14 of 22