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www.eneraeb.com I Helena, MT 677-472-0711 a Billings, MT 800-735-4489 s Casper, WY 888-235-0515 <br />E'idgMJQ° ' 1W Gillette, WY $66-686-7175 - Rapid City, SD 888-672-1225 - College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11/29/10 <br />Project: Schwartzwalder Water Monitoring Program SW Work Order: C10101013 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Batch: 28175 <br />Sample ID: MB-28175 11 Method Blank Run: ICPMS4-C_101115A 11/16/10 05:02 <br />Antimony ND mg/L 0.0010 <br />Arsenic 0.000517 mg/L 0.00050 <br />Chromium 0.000396 mg/L 0.0010 <br />Copper 0.000209 mg/L 0.0010 <br />Lead ND mg/L 0.0050 <br />Manganese 0.000494 mg/L 0.0050 <br />Molybdenum 0.00158 mg/L 0.0050 <br />Silver 0.000174 mg/L 5.0E-05 <br />Thallium 0.000632 mg/L 0.00020 <br />Uranium 3.85E-05 mg/L 0.00020 <br />Zinc 0.00169 mg/L 0.0050 <br />Sample ID: LCS3-28175 11 Laboratory Control Sample Run: ICPMS4-C_101115A 11/16/10 05:37 <br />Antimony 0.573 mg/L 0.050 115 85 115 <br />Arsenic 0.506 mg/L 0.0010 101 85 115 <br />Chromium 0.499 mg/L 0.050 100 85 115 <br />Copper 0.492 mg/L 0.010 98 85 115 <br />Lead 0.515 mg/L 0.050 103 85 115 <br />Manganese 2.42 mg/L 0.010 97 85 115 <br />Molybdenum 0.530 mg/L 0.10 106 85 115 <br />Silver 0.0505 mg/L 0.010 101 85 115 <br />Thallium 0.509 mg/L 0.10 102 85 115 <br />Uranium 0.527 mg/L 0.00030 105 85 115 <br />Zinc 0.490 mg/L 0.010 98 85 115 <br />Sample ID: C10101013-004EMS3 11 Sample Matrix Spike Run: ICPMS4-C_101115A 11/16/10 06:18 <br />Antimony 0.571 mg/L 0.050 114 70 130 <br />Arsenic 0.501 mg/L 0.0010 100 70 130 <br />Chromium 0.483 mg/L 0.050 97 70 130 <br />Copper 0.478 mg/L 0.010 95 70 130 <br />Lead 0.529 mg/L 0.050 106 70 130 <br />Manganese 2.46 mg/L 0.010 98 70 130 <br />Molybdenum 0.524 mg/L 0.10 105 70 130 <br />Silver 0.0510 mg/L 0.010 102 70 130 <br />Thallium 0.521 mg/L 0.10 104 70 130 <br />Uranium 0.502 mg/L 0.00030 98 70 130 <br />Zinc 0.474 mg/L 0.010 94 70 130 <br />Sample ID: C10101013-004EMSD 11 Sample Matrix Spike Duplicate Run: ICPMS4-C_101115A 11/16/10 06:25 <br />Antimony 0.576 mg/L 0.050 115 70 130 0.8 20 <br />Arsenic 0.497 mg/L 0.0010 99 70 130 0.7 20 <br />Chromium 0.483 mg/L 0.050 97 70 130 0.0 20 <br />Copper 0.476 mg/L 0.010 95 70 130 0.5 20 <br />Lead 0.517 mg/L 0.050 103 70 130 2.4 20 <br />Manganese 2.45 mg/L 0.010 97 70 130 0.3 20 <br />Qualifiers: <br />RL - Analyte reporting limit. ND- N ot detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 17 of 32