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Kww.energyla5.com i Helena, MT 877-472-0711 a Billings, MT 800-735-4489 n Casper, WY 888-235-0515 <br />_ Analyrlca/facaboceSh o 195T f Gillette, WY 866-686-7175 > Rapid City, SD 888.672-1223 o College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 10/04/10 <br />Project: Schwartzwalder Water Monitoring Program-Discharge Work Order: C10090551 <br />Analyle Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Balch: 27447 <br />Sample 10: MB-27447 4 Method Blank Run: ICPMS2-C_100921 A 09/22/10 02:46 <br />Arsenic ND mg/L 0.0008 <br />Copper ND mg/L 0.0002 <br />Nickel 0.0006 mg/L 9E-05 <br />Zinc ND mg/L 0.001 <br />Sample ID: C10090551.001DMS4 4 Sample Matrix Spike Run: ICPMS2-C_100921A 09/22/10 03:00 <br />Arsenic 0.0530 mg/L 0,0010 106 70 130 <br />Copper 0,0521 mg/L 0.010 100 70 130 <br />Nickel 0.0631 mg/L 0.050 101 70 130 <br />Zinc- 0.0683 mg/L 0.010 100 70 130 <br />Sample ID: C10090551-001DMSD 4 Sample Matrix Spike Duplicate Run: ICPMS2-C_100921A 09/22/10 03:07 <br />Arsenic 0.0536 mg/L 0.0010 107 70 130 1.3 20 <br />Copper 0.0528 mg/L 0.010 101 70 130 1.4 20 <br />Nickel 0.0635 mg/L 0.050 102 70 130 0.6 20 <br />Zinc 0.0687 mg/L 0.010 101 70 130 0.5 20 <br />Method: E200.8 Balch: 27487 <br />Sample ID: MB-27487 4 Method Blank Run: ICPMS2-C_100921A 09/22/10 03:20 <br />Antimony ND mg/L 0.0002 <br />Arsenic 0.001 mg/L 0.0003 <br />Thallium ND mg/L 5E-05 <br />Uranium ND mg/L 4E-05 <br />Sample ID: LCS3-27487 4 Laboratory Control Sample Run: ICPMS2-C_100921A 09,22/10 03:27 <br />Antimony 0.579 mg/L OA50 116 85 115 S <br />Arsenic 0.517 mg/L 0.0010 103 85 115 <br />Thallium 0.523 mg/L 0.10 105 85 115 <br />Uranlum 0.556 mg/L 0.00030 111 85 115 <br />Sample ID: 010090626-005AMS3 4 Sample Matrix Spike Run: ICPMS2-C_100921A 09/22/10 04:28 <br />Antimony 0.611 mg/L 0.050 122 70 130 <br />Arsenic 0.535 mg/L 0-0010 107 70 130 <br />Thallium 0.552 mg/L 0.10 110 70 130 <br />Uranium 0.592 mg/L 0.00030 117 70 130 <br />Sample ID: C10090626-005AMSD 4 Sample Matrix Spike Duplicate Run: ICPMS2-C_100921A 09/22/10 04:34 <br />Antimony 0.564 mg/L 0.050 113 70 130 8.1 20 <br />Arsenic 0.506 mg/L 0.0010 101 70 130 5.6 20 <br />Thallium 0.524 mg/L 0.10 105 70 130 5.4 20 <br />Uranium 0.565 mg/L 0.00030 112 70 130 4.6 20 <br />Qualifiers: <br />RL - Analyle reporting limit. <br />MDC - Minimum delectable concentration <br />ND - Not detected at the reporting limit. <br />S - Spike recovery outside of advisory limits. <br />Page 12 of 22