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_ __ _ ?.,_- _..-- -- - -- -- - ....... <br />Helena, MT 877.472-0711 * Billings, MT 800-735-4489 • Casper, Y{Y 888-235-0515 <br />. , . ;? =/ MrfyG'ca/ExceileaooStnco l95T Gillette, WY 868-686-7175 a Rapid City, SO 888-672-1225 c College Station, TX 888-590-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 12/10/10 <br />Project: Schwartzwalder Water Monitoring Program - SW Work Order: 010110203 <br />Analyle Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Goal <br />Method: E200.8 Batch: 28327 <br />Sample ID: MB-28327 9 Method Blank Run: ICPMS4- C_101202A 12/03/10 02:55 <br />Antimony 0.000868 mg/L 0.0010 <br />Arsenic 0.000928 mg/L 0.00050 <br />Chromium 0.000644 mg/L 0.0010 <br />Lead ND mg/L 0.0050 <br />Molybdenum ND mg/L 0.0050 <br />Silver ND mg/L 5.0E-05 <br />Thallium ND mg/L 0.00020 <br />Uranium ND mg/L 0.00020 <br />Zinc 0.00251 mg/L 0.0050 <br />Sample ID: LCS3-28327 9 Laboratory Control Sample Run: ICPMS4-C-101202A 12/03/10 03:02 <br />Antimony 0.587 mg/L 0.050 117 85 115 S <br />Arsenic 0.482 mg/L 0.0010 96 85 115 <br />Chromium 0.482 mg/L 0.050 96 85 115 <br />Lead 0.508 mg/L 01050 102 85 115 <br />Molybdenum 0.515 mg/L 0.10 103 85 115 <br />Silver 0.0528 mg/L 0.010 106 85 115 <br />Thallium 0.493 mg/L 0.10 99 85 115 <br />Uranium 0.543 mg/L 0.00030 109 85 115 <br />Zinc 0.473 mg/L 0.010 94 85 115 <br />- Response is above standard OA limit. This could indicate a hi gh bias for the sam ple results. Since there were no detecta ble analyze resp onses. and the remainder of the <br />run OA is within acceptance range, this batch is approved. <br />Sample ID: C10110203-001 DMS3 9 Sample Matrix Spike Run: ICPMS4-C__l01202A 12/03/10 03:29 <br />Antimony 0.607 mg/L 0.050 121 70 130 <br />Arsenic 0.502 mg/L 0.0010 100 70 130 <br />Chromium 0.507 mg/L 0.050 101 70 130 <br />Lead 0.531 mg/L 0.050 106 70 130 <br />Molybdenum 0.542 mg/L 0.10 108 70 130 <br />Silver 0.0538 mg/L 0.010 108 70 130 <br />Thallium 0.512 mg/L 0.10 102 70 130 <br />Uranium 0.570 mg/L 0.00030 114 70 130 <br />Zinc 0.483 mg/L 0.010 96 70 130 <br />Sample ID: C10110203.001 DMSD 9 Sample Matrix Spike Duplicate Run: ICPMS4-C-1 01 202A 12/03/10 03:35 <br />Antimony 0.590 mg/L 0.050 118 70 130 2.8 20 <br />Arsenic 0.478 mg/L 0.0010 95 70 130 4.9 20 <br />Chromium 0.482 mg/L 0.050 96 70 130 5.0 20 <br />Lead 0.504 mg/L 0.050 101 70 130 5.1 20 <br />Molybdenum 0.521 mg/L 0.10 104 70 130 3.8 20 <br />Silver 0.0516 mg& 0.010 103 70 130 4.2 20 <br />Thallium 0.486 mg/L D.10 97 70 130 5.4 20 <br />Uranium 0.540 ri 0.00030 108 70 130 5.5 20 <br />Zinc 0.460 mg/L 0.010 91 70 130 4.9 20 <br />Qualifiers: <br />RL - Analyle reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration S - Spike recovery outside of advisory limits. <br />Page 24 of 43