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WWWA Obb.com <br />AU"9#Ex rSMI <br />YAi241711 -Billings, MT 800-135-4189 • Casper, WY 888-235-0515 <br />7 5'Q,Ra Fd City, SD BBB7672-1225 - College Station, TX 888-610-2216 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz SW 03/08/11 S25677-S25684 <br />Report Date: 04/08/11 <br />Work Order: 011030280 <br />Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: D2036 Batch: B_R162423 <br />Sample ID: MBLK Method Blank Run: SUB-B162423 03/14/11 12:13 <br />Cyanide, Weak Acid Dissociable ND mg/L 0.0020 <br />Sample ID: LFB Laboratory Fortified Blank Run: SUB-B162423 03/14/11 12:11 <br />Cyanide, Weak Acid Dissociable 0.101 mg/L O.OD50 101 90 110 <br />Sample ID: C11030280-0051 Sample Matrix Spike Duplicate Run: SUB-B162423 03/14/11 13:30 <br />Cyanide, Weak Acid Dissociable 0.0981 mg/L 0.0050 98 80 120 2.1 10 <br />Sample ID: 011030280-0051 Sample Matrix Spike Run: SUB-B162423 03/14/11 13:28 <br />Cyanide, Weak Acid Dissociable 0.0961 mg/L 0.0050 96 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 16 of 36