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www.energylab.COm Helena, MT 877 -472 -0711 • Billings, MT 801 -735 -4469 • Casper WY 888- 235 -0515 <br />Anty"EmAwat W Gillette, WY 866 -686 -7175 • Rapid City, SD 888 -672 -1225 • College Station, TX 888480 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: <br />Cotter Corporation <br />Report Date: <br />02/17/15 <br />Project: <br />Schwartz - GW 1/28/15 S28066, S28069, S28071 <br />Work Order: <br />C15010751 <br />Analyte <br />Count Result Units RL %REC Low Limit <br />High Limit RPD <br />RPDLimit Qua[ <br />Method: <br />E200.8 <br />Analytical Run: ICPMS2- C_150203A <br />Lab ID: <br />lCV 2 Initial Calibration Verification Standard <br />02/02/15 14:53 <br />Mercury <br />0.00504 mg /L 0.0010 101 90 <br />110 <br />Silver <br />0.0187 mg /L 0.0010 94 90 <br />110 <br />Method: <br />E200.8 <br />Batch: R195780 <br />Lab ID: <br />LRB <br />2 <br />Method Blank <br />Run: ICPMS2- C_150203A <br />02/02/15 15:11 <br />Mercury <br />ND mg /L <br />0.00010 <br />Silver <br />0.0004 mg /L <br />5E -05 <br />Lab ID: <br />LFB - non filtered <br />2 <br />Laboratory Fortified Blank <br />Run: ICPMS2- C_150203A <br />02/02/15 15:48 <br />Mercury <br />0.0109 mg /L <br />0.0010 <br />109 <br />85 115 <br />Silver <br />0.0196 mg /L <br />0.0010 <br />98 <br />85 115 <br />Lab ID: <br />C15010725- 005BMS4 <br />2 <br />Sample Matrix Spike <br />Run: ICPMS2- C_150203A <br />02/02/15 23:03 <br />Mercury <br />0.0873 mg /L <br />0.00023 <br />87 <br />70 130 <br />Silver <br />0.200 mg /L <br />0.0010 <br />100 <br />70 130 <br />Lab ID: <br />C15010725- 005BMSD <br />2 <br />Sample Matrix Spike Duplicate <br />Run: ICPMS2- C_150203A <br />02/02/15 23:07 <br />Mercury <br />0.0883 mg /L <br />0.00023 <br />88 <br />70 130 1.1 <br />20 <br />Silver <br />0.204 mg /L <br />0.0010 <br />102 <br />70 130 2.0 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 10 of 23 <br />