2011-04-08_HYDROLOGY - M1977300 (2)

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• Wb=m 0711 • Billings, MT 000-735-4419 • Casper, WY 888-235-1515 I$1 ?M18-11-4727 kd&" acalYeaSImIm 17175"• Raoid City, sD s!8-672-1225 • College Station, TX B19-670-2213 QA/QC Summary Report Prepared by C asper, W Y Branch Client: Cotter Corporation Report Date: 04/20/11 Project: Schwartz-SW 3/22/11 S25636-S25643 Work Order: C11030702 Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method: E200.8 Analytical Run: ICPMS4-C_110330A Sample ID: CCV 2 Continuing Cal ibration Verification Standa rd 03/30/11 15:12 Antimony 0.058 mg/L 0.0010 97 90 110 Molybdenum 0.060 mg/L 0.0010 100 90 110 Sample ID: CCV 2 Continuing Cal ibration Verification Standa rd 03/30/11 16:44 Antimony 0.057 mg/L 0.0010 95 90 110 Molybdenum 0.060 mg/L 0.0010 100 90 110 Method: E200.8 Batch: 29387 Sample ID: MB-29387 10 Method Blank Run: ICPMS4-C_110330A 03/30/11 12:53 Antimony 0.002 mg/L 0.0003 Arsenic 0.0005 mg/L 5E-05 Chromium 0.0005 mg/L 3E-05 Copper 0.003 mg/L 5E-05 Lead 7E-05 mg/L 5E-05 Molybdenum 0.0001 mg/L 0.00010 Silver 8E-05 mg/L 4E-05 Thallium 0.0002 mg/L 0.0001 Uranium ND mg/L 4E-05 Zinc ND mg/L 0.001 Sample ID: LCS3-29387 8 Laboratory Control Sample Run: ICPMS4-C_110330A 03/30/11 13:00 Arsenic 0.508 mg/L 0.0010 102 85 115 Chromium 0.490 mg/L 0.050 98 85 115 Copper 0.500 mg/L 0.010 99 85 115 Lead 0.526 mg/L 0.050 105 85 115 Silver 0.0545 mg/L 0.010 109 85 115 Thallium 0.508 mg/L 0.10 101 85 115 Uranium 0.565 mg/L 0.00030 113 85 115 Zinc 0.512 mg/L 0.010 102 85 115 Sample ID: 011030715-005CMS3 8 Sample Matrix Spike Run: ICPMS4-C_110330A 03/30/11 14:02 Arsenic 0.508 mg/L 0.0010 101 70 130 Chromium 0.478 mg/L 0.050 95 70 130 Copper 0.490 mg/L 0.010 97 70 130 Lead 0.538 mg/L 0.050 107 70 130 Silver 0.0526 mg/L 0.010 105 70 130 Thallium 0.515 mg/L 0.10 103 70 130 Uranium 0.558 mg/L 0.00030 111 70 130 Zinc 0.513 mg/L 0.010 101 70 130 Sample ID: C11030715-005CMSD 8 Sample Matrix Spike Duplicate Run: ICPM S4-C_110330A 03/30/11 14:09 Arsenic 0.530 mg/L 0.0010 105 70 130 4.1 20 Chromium 0.495 mg/L 0.050 99 70 130 3.5 20 Copper 0.510 mg/L 0.010 101 70 130 3.9 20 Lead 0.550 mg/L 0.050 110 70 130 2.2 20 Silver 0.0545 mg/L 0.010 109 70 130 3.4 20 Qualifiers: RL - Analyte reporting limit. ND - Not detected at the reporting limit. MDC - Minimum detectable concentration Page 19 of 38