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www.energylab.com Helena, MT 877-472-0711 • Billings, MT 800-735-4489 * Casper, WY 888-235-0515 <br />An#46 16rcerkmSir=11.52 Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-69D-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: A2540 D Batch: R136641 <br />Sample ID: MBLK1_ Method Blank Run: BAL-1_100830A 08/30/10 10:53 <br />Solids, Total Suspended TSS @ 105 C ND mg/L 0.3 <br />Sample ID: LCS1_ Laboratory Control Sample Run: BAL-1_100830A 08/30/10 10:53 <br />Solids, Total Suspended TSS @ 105 C 182 mg/L 4.0 91 60 110 <br />Sample ID: C10081020-001ADUP Sample Duplicate Run: BAL-1_100830A 08/30/10 10:57 <br />Solids, Total Suspended TSS @ 105 C 80.0 mg/L 4.0 2.5 25 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 16 of 44