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'` arw+r.energylab.com Helena, MT B77-472-071 1 . Billings, MT 800-735-4489 Casper, WY 888-235-0515 <br />` AnalydcalExcetleeceS7ece 1952 J ^ _Gillette, WY 866-686-7175 . Rapid City, SO 888.672-1225 - College Station, IX 686-690-221 B <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine Monitoring Program-Surface Wat <br />Analyte Count Result Units <br /> <br />RL %REC Low Limit Report Date: 01/05/11 <br />Work Order: C10110690 <br />High Limit RPD RPDLimit Qual <br />Method: E200.7 Balch: R140755 <br />Sample ID: MB-101209A 8 Method Blank Run: ICP2-C_101209A 12/09110 11:31 <br />Aluminum ND mg/L 0.20 <br />Boron ND mg/L 0.10 <br />Calcium ND mg/L 0.40 <br />Iron ND mg/L 0.030 <br />Magnesium ND mg/L 0.10 <br />Manganese ND mg/L 0.0050 <br />Potassium ND mg/L 0.10 <br />Sodium ND mg/L 0.60 <br />Sample ID: LFB-101209A 8 Laboratory Fortified Blank Run: ICP2-C_101209A 12109110 11:35 <br />Aluminum 0.969 mg/L 0.10 97 85 115 <br />Boron 0.953 mg/l- 0.10 95 85 115 <br />Calcium 49.4 mg/L 0.50 99 85 115 <br />Iron 0.991 mg/L 0.030 99 85 115 <br />Magnesium 50.1 mg/L 0.50 100 85 115 <br />Manganese 0.969 mg/L 0.010 97 85 115 <br />Potassium 52.5 mg/L 0.82 105 85 115 <br />Sodium 48.0 mg/L 0.50 96 85 115 <br />Sample ID: C10110688-001CMS2 8 Sample Matrix Spike Run: ICP2-C _,101209A 12/09/10 12:28 <br />Aluminum 1.98 mg/L 0.10 97 70 130 <br />Boron 2.01 mg/L 0.10 95 70 130 <br />Calcium 105 mg/L 1.0 97 70 130 <br />Iron 1.99 mg/L 0.030 97 70 130 <br />Magnesium 99.4 mg/L 1.0 97 70 130 <br />Manganese 1.96 mglL 0.010 96 70 130 <br />Potassium 90.7 mg/L 1.0 88 70 130 <br />Sodium 157 mg/L 1.0 96 70 130 <br />Sample ID: C10110688-001CMSD 8 Sample Matrix Spike Duplicate Run: ICP2-C _101209A 12/09/10 12:32 <br />Aluminum 1.94 mg/L 0.10 95 70 130 2.0 20 <br />Boron 2.02 mg/L 0.10 95 70 130 0.5 20 <br />Calcium 104 mg/L 1.0 97 70 130 0.6 20 <br />Iron 2.00 mg/L 0.030 98 70 130 0.5 20 <br />Magnesium 99.9 mg/L 1.0 98 70 130 0.5 20 <br />Manganese 1.97 mg/L 0.010 96 70 130 0.3 20 <br />Potassium 91.3 mg/L 1.0 89 70 130 0.7 20 <br />Sodium 161 mg!L 1.0 100 70 130 2.3 20 <br />Qualifiers: <br />RL - Analyle reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum delectable concentration <br />Page 17 of 39