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www.erwdab=rn Nalena, MT 677-472-0711 • Billings, MT 5UU-130-4403 • uaaper, m 0o3-440-urara <br />A&0AWE Zb= IW Gillette, WY 866-686-7175 • Rapid City, SD 886-672-1225 • College Station, TX 888-680-2216 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz SW02-03-11 S25602-S25608 <br />Analyte Count Result Units <br />Method: E200.8 <br />Sample ID: LRB 8 Method Blank <br />Aluminum ND mg/L <br />Antimony ND mg/L <br />Chromium ND mg/L <br />Copper ND mg/L <br />Lead ND mg/L <br />Manganese ND mg/L <br />Silver ND mg/L <br />Thallium ND mg/L <br />Sample ID: LFB 8 Laboratory Fortified Blank <br />Aluminum 0.0468 mg/L <br />Antimony 0.0503 mg/L <br />Chromium 0.0486 mg/L <br />Copper 0.0468 mg/L <br />Lead 0.0488 mg/L <br />Manganese 0.0481 mg/L <br />Silver 0.0193 mg/L <br />Thallium 0.0482 mg/L <br />Sample ID: C11020155-007AMS4 8 Sample Matrix Spike <br />Aluminum 0.236 mg/L <br />Antimony 0.266 mg/L <br />Chromium 0.242 mg/L <br />Copper 0.247 mg/L <br />Lead 0.256 mg/L <br />Manganese 0.242 mg/L <br />Silver 0.0911 mg/L <br />Thallium 0.254 mg/L <br />Sample ID: C11020155-007AMSD 8 Sample Matrix Spike Duplicate <br />Aluminum 0.244 mg/L <br />Antimony 0.266 mg/L <br />Chromium 0.244 mg/L <br />Copper 0.249 mg/L <br />Lead 0.256 mg/L <br />Manganese 0.246 mg/L <br />Silver 0.0978 mg/L <br />Thallium 0.255 mg/L <br />Report Date: 03/04/11 <br />Work Order: C11020189 <br />RL %REC Low Limit High Limit RPD RPDLimit Quai <br />Batch: R142649 <br />Run: ICPMS2-C 110209A 02/09/11 11:36 <br />0.20 <br />0.0010 <br />0.0010 <br />0.0010 <br />0.0050 <br />0.0050 <br />0.00020 <br />0.00020 <br /> Run: ICPMS2-C 110209A 02/09/11 11:43 <br />0.0010 94 85 115 <br />0.0010 101 85 115 <br />0.0010 97 85 115 <br />0.0010 94 85 115 <br />0.0010 98 85 115 <br />0.0010 96 85 115 <br />0.0010 96 85 115 <br />0.0010 96 85 115 <br /> Run: ICPMS2-C 110209A 02/09/11 16:25 <br />0.10 94 70 130 <br />0.050 106 70 130 <br />0.050 96 70 130 <br />0.010 95 70 130 <br />0.050 102 70 130 <br />0.010 95 70 130 <br />0.010 91 70 130 <br />0.10 101 70 130 <br /> Run: ICPMS2-C_110209A 02/09/1116:32 <br />0.10 97 70 130 3.3 20 <br />0.050 106 70 130 0.2 20 <br />0.050 97 70 130 0.9 20 <br />0.010 95 70 130 0.7 20 <br />0.050 102 70 130 0.1 20 <br />0.010 97 70 130 1.6 20 <br />0.010 98 70 130 7.0 20 <br />0.10 102 70 130 0.7 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 19 of 37