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www.ener&b.com Helena, MT 871472 -0711 • Billings, W 868- 7354489 • Casper, WY 888 -235 -0515 <br />En' 9m t Gillette, WY 866 -886 -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: 06/04/13 <br />Project: Schwartz SW 05/10/13 S26874 & S26875 & S26926 -S269 Work Order: C13050437 <br />Analyte Count Result Units RL 0/J9EC Low Limit High Limit RPD RPDLimit Qual <br />Method: D2036C Analytical Run: SUB - 6204920 <br />Sample ID: ICV Initial Calibration Verification Standard 05/20/13 11:07 <br />Cyanide, Weak Acid Dissociable 0.108 mg /L 0.0050 108 90 110 <br />Method: D2036C <br />Batch: B R204920 <br />Sample ID: LFB <br />Laboratory Fortified Blank <br />Run: SUB - 6204920 <br />05/20/13 11:10 <br />Cyanide, Weak Acid Dissociable <br />0.0981 mg /L <br />0.0050 <br />98 90 110 <br />Sample ID: MB <br />Method Blank <br />Run: SUB - 6204920 <br />05/20/13 11:12 <br />Cyanide, Weak Acid Dissociable <br />ND mg /L <br />0.002 <br />Sample ID: 613051604 -001 EMS <br />Sample Matrix Spike <br />Run: SUB - 6204920 <br />05/20/13 11:54 <br />Cyanide, Weak Acid Dissociable <br />0.109 mg /L <br />0.0050 <br />109 80 120 <br />Sample ID: B13051604 -001 EMSD <br />Sample Matrix Spike Duplicate <br />Run: SUB - 6204920 <br />05/20/13 11:57 <br />Cyanide, Weak Acid Dissociable <br />0.111 mg /L <br />0.0050 <br />111 80 120 <br />1.9 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit <br />Page 16 of 40 <br />