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.._ - - ...... ........ <br />www.e-nergylab.com Helena, MT 877-472-0711 + Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />AnalytMExeaumeShwo IM Gillette, WY 866-686-7175 a Rapid City, SD 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 Qua[ <br />Method: A2540 C Batch: 100830_1_SLDS-TDS-W <br />Sample ID: MBLK1_100830 Method Blank Run: BAL-1 100830B 08/30/10 10:09 <br />Solids, Total Dissolved TDS @ 180 C ND mg/L 10 <br />Sample ID: LCS1_100830 Laboratory Control Sample Run: BAL-1_100830B 08/30/10 10:09 <br />Solids, Total Dissolved TDS @ 180 C 990 mg/L 10 99 90 110 <br />Sample ID: C10080997-003AMS Sample Matrix Spike Run: BAL-1_100830B 08/30/10 10:12 <br />Solids, Total Dissolved TDS @ 180 C 4150 mg/L 10 102 90 110 <br />Sample ID: C10080997-003AMSD Sample Matrix Spike Duplicate Run: BAL-1_100830B 08/30/10 10:13 <br />Solids, Total Dissolved TDS @ 180 C 4130 mg/L 10 102 90 110 0.4 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 15 of 44