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www.energylab.com Y Helena, MT 877-472-0711 a Billings, MT 800-735.4489 * Casper, WY 888-235-0515 <br />Malytlul Ercalfeate Sinca?95T Giilette, WY 866-686-7175 a Rapid Cdy, SD 888-672-1225 * College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 08/16/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: C10070913 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Batch: 26902 <br />Sample ID: MS-26902 8 Method Blank Run: ICPMS2-C-100809A 08/09/10 19:00 <br />Aluminum NO mg/L 0.01 <br />Antimony 0.0002 mg/L 0.0002 <br />Arsenic 0.0007 mg/L 0.0003 <br />Copper NO mg/L 0.0005 <br />Lead NO mg/L 5E-05 <br />Silver NO mg/L 0.0002 <br />Thallium NO mg/L 5E-05 <br />Zinc 0.002 mg/L 0.001 <br />Sample ID: LCS3-26902 8 Laboratory Control Sample Run: ICPMS2-C-100809A 08/09/10 19:07 <br />Aluminum 2.45 mg/L 0.10 98 85 115 <br />Antimony 0.608 mg/L 0.050 122 85 115 S <br />Arsenic 0.520 mg/L 0.0010 104 85 115 <br />Copper 0.500 mg/L 0.010 100 85 115 <br />Lead 0.539 mg/L 0.050 108 85 115 <br />Silver 0.0537 mg/L 0.010 107 85 115 <br />Thallium 0.531 mg/L 0.10 106 85 115 <br />Zinc 0.501 mg/L 0.010 100 85 115 <br />- Response ter Antimony is above standard QA limit. This could indicate a high bia s for the sam ple resul ts. Since there were no detectable analyte responses. and the <br />remainder of the run OA is within acceptance range, this batch is approved. <br />Sample ID: 010070913-011CMS3 8 Sample Matrix Spike Run: ICPMS2-C-100809A 08/09/10 23:04 <br />Aluminum 2.33 mg/L 0.10 91 70 130 <br />Antimony 0.653 mg/L 0.050 128 70 130 <br />Arsenic 0.581 mg/L 0.0010 112 70 130 <br />Copper 0.512 mg/L 0.010 101 70 130 <br />Lead 0.570 mg/L 0.050 114 70 130 <br />Silver 0.0524 mg/L 0.010 105 70 130 <br />Thallium 0.563 mg/L 0.10 110 70 130 <br />Zinc 0.858 mg/L 0.010 105 70 130 <br />Sample ID: C10070913.011CMSD 8 Sample Matrix Spike Duplicate Run: ICPMS2-C_100809A 08/09/10 23:10 <br />Aluminum 2.27 mg/L 0.10 89 70 130 2.4 20 <br />Antimony 0.637 mg/L 0.050 125 70 130 2.4 20 <br />Arsenic 0.543 mg/L 0.0010 105 70 130 6.7 20 <br />Copper 0.493 mg/L 0.010 98 70 130 3.7 20 <br />Lead 0.553 mg/L 0.050 110 70 130 3 20 <br />Silver 0.0513 mg/L 0.010 102 70 130 2.3 20 <br />Thallium 0.549 mg/L 0.10 107 70 130 2.6 20 <br />Zinc 0.833 mg/L 0.010 100 70 130 2.9 20 <br />Qualifiers: <br />RL - Analyle reporting limit. <br />MDC - Minimum detectable concentration <br />NO - Not detected at the reporting limit. <br />S - Spike recovery outside of advisory limits. <br />Page 37 of 45