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• www4nergylab.com Helena, VT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />« IaaWa b0baw Sfto ton Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 08/15/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: C10070865 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Batch: 26812 <br />Sample ID: MB-26812 Method Blank Run: ICPMS2-C_100730B 07/30/10 21:22 <br />Antimony 0.0005 mg/L 0.0002 <br />Sample ID: LCS3-26812 Laboratory Control Sample Run: ICPMS2-C_100730B 07/30/10 21:29 <br />Antimony 0.629 mg/L 0.050 126 85 115 S <br />- Response for antimony is above standard QA limit. This could indicate a high bias for the sam ple results. Since there were no detectable analyte responses, and the <br />remainder of the run QA is within acceptance range, this batch is approved. <br />Sample ID: C10070862-001AMS3 Sample Matrix Spike Run: ICPMS2-C_100730B 07/30/10 21:56 <br />Antimony 0.634 mg/L 0.050 127 70 130 <br />Sample ID: C10070862-001 AMSD Sample Matrix Spike Duplicate Run: ICPMS2-C_100730B 07/30/10 22:03 <br />Antimony 0.630 mg/L 0.050 126 70 130 0.6 20 <br />Method: E200.8 Batch: R135542 <br />Sample ID: LRB 4 Method Blank Run: ICPMS2-C_100730B 07/30/10 13:29 <br />Antimony ND mg/L 7E-05 <br />Arsenic 0.0002 mg/L 6E-05 <br />Mercury ND mg/L 8E-05 <br />Thallium ND mg/L 1 E-05 <br />Sample ID: LFB 4 Laboratory Fortified Blank Run: ICPMS2-C_100730B 07/30/10 13:36 <br />Antimony 0.0523 mg/L 0.0010 105 85 115 <br />Arsenic 0.0533 mg/L 0.0010 106 85 115 <br />Mercury 0.00530 mg/L 0.0010 106 85 115 <br />Thallium 0.0531 mg/L 0.0010 106 85 115 <br />Sample ID: C1 0070973-001 BMS4 4 Sample Matrix Spike Run: ICPMS2-C_100730B 07/31/10 00:24 <br />Antimony 0.288 mg/L 0.050 115 70 130 <br />Arsenic 0.332 mg/L 0.0010 110 70 130 <br />Mercury 0.0277 mg/L 0.0010 111 70 130 <br />Thallium 0.266 mg/L 0.10 106 70 130 <br />Sample ID: C10070973-001 BMSD 4 Sample Matrix Spike Duplicate Run: ICPMS2-C_100730B 07/31/10 00:31 <br />Antimony 0.289 mg/L 0.050 115 70 130 0.1 20 <br />Arsenic 0.325 mg/L 0.0010 107 70 130 2.1 20 <br />Mercury 0.0274 mg/L 0.0010 110 70 130 1 20 <br />Thallium 0.262 mg/L 0.10 105 70 130 1.5 20 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration S - Spike recovery outside of advisory limits. <br />Page 13 of 25