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www.e odeb.com 724111 • B1Nings, MT AOD-735-4119 • Casper, WY 888-235-0516 <br />- A fF?cMYwtiSkpl!!t 7-k%`1 aQid City, SD 888-672-1225 • College Station, TX 868-610-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 12/28/10 <br />Project: Schwartzwalder Mine Monitoring Program-Discharge Work Order: C10110835 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: D2036 Batch: B_R157829 <br />Sample ID: C10110835-0011 Sample Matrix Spike Run: SUB-B157829 11/30/10 15:13 <br />Cyanide, Weak Acid Dissociable 0.106 mg/L 0.0050 104 80 120 <br />Sample ID: C10110835-0011 Sample Matrix Spike Duplicate Run: SUB-B157829 11/30/10 15:15 <br />Cyanide, Weak Acid Dissociable 0.108 mg/L 0.0050 105 80 120 1.3 10 <br />Sample ID: LFB Laboratory Fortified Blank Run: SUB-B157829 11/30/10 15:06 <br />Cyanide, Weak Acid Dissociable 0.104 mg/L 0.0050 104 90 110 <br />Sample ID: MBLK Method Blank Run: SUB-B157829 11/30/10 15:08 <br />Cyanide, Weak Acid Dissociable ND mg/L 0.002 <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