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www.enerdab.com Helena, till' 877472 -0711 • Billings, MT 800- 7354489 • Casper, WY 888 - 235-0515 <br />' 'ms N= Im Gillette, Wy 866 -686 -7175 • Rapid City, SG 888 - 672 -1225 • College Station, T% 888- 690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz 5/16/13 S26976- S26978 & S26980- S26983 <br />Analyte Count Result Units <br />Method: D2036C <br />Sample ID: ICV Initial Calibration Verification <br />Cyanide, Weak Acid Dissociable 0.0959 mg /L <br />Report Date: 06/12/13 <br />Work Order: C13050679 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Analytical Run: SUB- B205242 <br />Standard 05/24/13 11:26 <br />0.0050 96 90 110 <br />Method: D2036C <br />Sample ID: LFB <br />Laboratory Fortified Blank <br />Run: SUB- B205242 <br />Cyanide, Weak Acid Dissociable <br />0.0964 mg /L 0.0050 <br />96 90 110 <br />Sample ID: MB <br />Method Blank <br />Run: SUB- B205242 <br />Cyanide, Weak Acid Dissociable <br />ND mg /L 0.002 <br />Sample ID: B13051709- 003HMS <br />Sample Matrix Spike <br />Run: SUB- B205242 <br />Cyanide, Weak Acid Dissociable <br />0.0989 mg /L 0.0050 <br />99 80 120 <br />Sample ID: B13051709- 003HMSD <br />Sample Matrix Spike Duplicate <br />Run: SUB- B205242 <br />Cyanide, Weak Acid Dissociable <br />0.0998 mg /L 0.0050 <br />100 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Batch: B R205242 <br />05/24/13 11:29 <br />05/24/13 11:31 <br />05/24/13 12:01 <br />05/24/13 12:04 <br />0.9 10 <br />Page 15 of 37 <br />