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.... ..... .... .._.__. <br />" www.energylab.crom Helena, MT 811-472-0711 • Billings, MT 800-735-4489 - Casper, wY 888-235-0515 <br />Analnin?fxrallancaSlnca 1952 Gillette, WY 866-686-1175 • Rapid City, SO 888-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine <br />Report Date: 09/27/10 <br />Work Order: C10080962 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E245.1 Batch: 27249 <br />S I ID MB 27249 Method Blank Run: CVAA C203 100830C 08/30/10 10:20 <br />amp e . - - <br />Mercury ND mg/L 8E-06 <br />Sample ID: LCS-27249 Laboratory Control Sample Run: CVAA_C203_100830C <br />Mercury 0.00517 mg/L 0.00020 103 90 110 <br />Sample ID: C10080886-001BMS Sample Matrix Spike Run: CVAA_C203_100830C <br />Mercury 0.00517 mg/L 0.00020 103 85 115 <br />Sample ID: 010080886-001BMSD Sample Matrix Spike Duplicate Run: CVAA_C203_100830C <br />Mercury 0.00516 mg/L 0.00020 103 85 115 0.2 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />08/30/10 10:21 <br />08/30/10 10:25 <br />08/30/10 10:27 <br />10 <br />Page 27 of 44