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\ www.enugylsb.com J Helena, MT 677472-0711 • Billings, MT 800-735-4488 • Casper, WY 888435-0515 <br />AwWW Am raa Gillette, WY 866.666-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-660-2218 <br />QA/QC Summary Report <br />Revised Date: 11 /23/10 <br />Client: Cotter Corporation Report Date: 11 /12/10 <br />Project: Schwartzwalder Water Monitoring Program Discharge Work Order: C10100590 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Batch: R138669 <br />Sample ID: LRB 8 Method Blank Run: ICPMS2-C_101018A 10/18/10 15:35 <br />Arsenic ND mg/L 6E-05 <br />Cadmium ND mg/L 1 E-05 <br />Copper ND mg/L 7E-05 <br />Nickel ND mg/L 0.0007 <br />Selenium ND mg/L 0.0002 <br />Silver ND mg/L 3E-05 <br />Uranium ND mg/L 1 E-05 <br />Zinc ND mg/L 0.0003 <br />Sample ID: LFB 8 Laboratory Fortified Blank Run: ICPMS2-C_101018A 10/18/10 15:42 <br />Arsenic 0.0534 mg/L 0.0010 107 85 115 <br />Cadmium 0.0520 mg/L 0.0010 104 85 115 <br />Copper 0.0513 mg/L 0.0010 103 85 115 <br />Nickel 0.0518 mg/L 0.0010 104 85 115 <br />Selenium 0.0536 mg/L 0.0010 107 85 115 <br />Silver 0.0197 mg/L 0.0010 98 85 115 <br />Uranium 0.0543 mg/L 0.00030 109 85 115 <br />Zinc 0.0528 mg/L 0.0010 106 85 115 <br />Sample ID: 010100590-001 DMS4 8 Sample Matrix Spike Run: ICPMS2-C_101018A 10/19/10 05:24 <br />Arsenic 0.0518 mg/L 0.0010 104 70 130 <br />Cadmium 0.0478 mg/L 0.010 95 70 130 <br />Copper 0.0480 mg/L 0.010 91 70 130 <br />Nickel 0.0503 mg/L 0.050 93 70 130 <br />Selenium 0.0503 mg/L 0.0010 98 70 130 <br />Silver 0.0138 mg/L 0.010 69 70 130 S <br />Uranium 0.0522 mg/L 0.00030 104 70 130 <br />Zinc 0.0688 mg/L 0.010 89 70 130 <br />Sample ID: C1 0100590-001 DMSD 8 Sample Matrix Spike Duplicate Run: ICPMS2-C_101018A 10/19/10 05:31 <br />Arsenic 0.0533 mg/L 0.0010 107 70 130 2.8 20 <br />Cadmium 0.0492 mg/L 0.010 98 70 130 2.8 20 <br />Copper 0.0495 mg/L 0.010 94 70 130 3.1 20 <br />Nickel 0.0520 mg/L 0.050 96 70 130 3.4 20 <br />Selenium 0.0523 mg/L 0.0010 102 70 130 4.0 20 <br />Silver 0.0143 mg/L 0.010 72 70 130 3.9 20 <br />Uranium 0.0547 mg/L 0.00030 109 70 130 4.6 20 <br />Zinc 0.0700 mg/L 0.010 92 70 130 1.6 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />S - Spike recovery outside of advisory limits. <br />Page 11 of 22