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www.energylab.mm Helena, AR 877-472-0711 • Billings, MT 800-735-4489 + Casper, WY 888-235-0515 <br />- ArutyNnl frreltrMSing 1952 Gillette, WY 866-686-7175 • Rapid City, so 888-672-1223 • College Station, TX 888-590-2218 <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: E200.8 Batch: H R65261 <br />Sample ID: ICB 5 Method Blank Run: SUB-1-165261 09/13/10 12:42 <br />Calcium ND mg/L 0.006 <br />Iron 0.0006 mg/L 0.0002 <br />Magnesium ND mg/L 0.0010 <br />Potassium ND mg/L 0.02 <br />Silver ND mg/L 2E-05 <br />Sample ID: LFB 5 Laboratory Fortified Blank Run: SUB-1-165261 09/13/10 12:49 <br />Calcium 48.8 mg/L 0.50 98 85 115 <br />Iron 4.99 mg/L 0.030 100 85 115 <br />Magnesium 48.5 mg/L 0.50 97 85 115 <br />Potassium 48.6 mg/L 0.50 97 85 115 <br />Silver 0.0182 mg/L 0.0050 91 85 115 <br />Sample ID: H10090021-003CMS 5 Sample Matrix Spike Run: SUB-1-165261 09/13/10 13:12 <br />Calcium 230 mg/L 1.0 89 70 130 <br />Iron 36.2 mg/L 0.030 81 70 130 <br />Magnesium 232 mg/L 1.0 90 70 130 <br />Potassium 226 mg/L 1.0 88 70 130 <br />Silver 0.0886 mg/L 0.0050 89 70 130 <br />Sample ID: H10090021-003CMSD 5 Sample Matrix Spike Duplicate Run: SUB-1-165261 09/13/10 13:19 <br />Calcium 241 mg/L 1.0 93 70 130 4.5 20 <br />Iron 35.0 mg/L 0.030 76 70 130 3.3 20 <br />Magnesium 235 mg/L 1.0 91 70 130 1.6 20 <br />Potassium 238 mg/L 1.0 93 70 130 5 20 <br />Silver 0.0900 mg/L 0.0050 90 70 130 1.7 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 26 of 44