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ENERGY <br />ww w.energylab.com r Helena, MT 877 -472 -0711 • Billings, MT 801 -735 -4489 • Casper, WY 888- 235 -0515 <br />Analytical Ercagma Sa' 1152 Gillette, WY 866 - 686 -7175 • Rapid City, SD 888 -672 -1225 • College Station, TX 888 -690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 01/26/12 <br />Project: Schwartz GW 12/20/11 S26201 Work Order: C11120751 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Analytical Run: ICPMS4- C_120103A <br />Sample ID: ICV Initial Calibration Verification Standard 01/03/12 13:24 <br />Silver 0.0194 mg /L 0.0010 97 90 110 <br />Method: E200.8 Batch R154993A <br />Sample ID: LRB Method Blank Run: ICPMS4- C_120103A 01/03/12 14 <br />Silver 0.000397 mg /L 8.0E -05 <br />Sample ID: LFB Laboratory Fortified Blank Run: ICPMS4- C_120103A 01/03/12 14:26 <br />Silver 0.0214 mg /L 0.0010 105 85 115 <br />Sample ID: C11120668- 001BMS4 Sample Matrix Spike Run: ICPMS4- C_120103A 01/04/12 21:29 <br />Silver 0.0185 mg /L 0.010 93 70 130 <br />Sample ID: C11120668 -001 BMSD Sample Matrix Spike Duplicate Run: ICPMS4- C_120103A 01/04/12 21:36 <br />Silver 0.0191 mg /L 0.010 96 70 130 3.2 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 19 <br />