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wwmeminrlab.Com Helena, MT 077- 472 -0711 a Billings, MT 800 -735 -4489 • Casper, WY 888- 235 -0515 <br />Z—'W JI Gillette, WY 866 -086 -7175 • Rapid CO, SO 886- 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: 06/19/13 <br />Project: Schwartz GW 5/23/2013 S26999 & S27000 Work Order: C13050906 <br />Analyte Count Result Units RL ° /oREC Low Limit High Limit RPD RPDLimit Qual <br />Method: E245.1 Analytical Run: CVAA_C203_130529A <br />Sample ID: ICV Initial Calibration Verification Standard 05/29/13 15:29 <br />Mercury 0.00499 mg /L 0.00020 100 90 110 <br />Method: E245.1 <br />Sample ID: IPC <br />Mercury <br />Instrument Performance Check Sample Run: CVAA_C203_130529A <br />0.00517 mg /L 0.00010 103 95 105 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Batch R174153 <br />05/29/13 14:54 <br />Page 15 of 24 <br />Method: <br />E245.1 <br />Batch: 37671 <br />Sample ID: <br />MB -37671 <br />Method Blank <br />Run: CVAA C203 130529A <br />05/29/13 15:48 <br />Mercury <br />ND mg /L <br />7E -05 <br />Sample ID: <br />LCS -37671 <br />Laboratory Control Sample <br />Run: CVAA_C203_130529A <br />05/29/13 15:49 <br />Mercury <br />0.00520 mg /L <br />0.00010 <br />104 80 120 <br />Sample ID: <br />C13050721- 001DMS <br />Sample Matrix Spike <br />Run: CVAA_C203_130529A <br />05/29/13 16:08 <br />Mercury <br />0.00515 mg /L <br />0.00010 <br />103 70 130 <br />Sample ID: <br />C13050721- 001DMSD <br />Sample Matrix Spike Duplicate <br />Run: CVAA_C203_130529A <br />05/29/13 16:16 <br />Mercury <br />0.00500 mg /L <br />0.00010 <br />100 70 130 3.0 <br />10 <br />Method: E245.1 <br />Sample ID: IPC <br />Mercury <br />Instrument Performance Check Sample Run: CVAA_C203_130529A <br />0.00517 mg /L 0.00010 103 95 105 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Batch R174153 <br />05/29/13 14:54 <br />Page 15 of 24 <br />