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• www.erwiDiab.com Helena, Ni 877-472 -0111 • Billings, I i 800- 735.4489 • Casper, WY 888-235 -8515 <br />Gillette, WY 866 -686 -1175 • Rapid City, SO 886- 672 -1225 • College Station, TIC 888-SOD -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 06/27/13 <br />Project: Schwartz SW 5/21/13 S26991 - S26995 Work Order: C13050860 <br />Analyte Count Result Units RL %REC 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 />Batch: 37671 <br />Sample ID: 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: 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 <br />80 120 <br />Sample ID: 013050817- 001BMS <br />Sample Matrix Spike <br />Run: CVAA_C203_130529A <br />05/29/13 16 14 <br />Mercury <br />0.00493 mg /L <br />0.00010 <br />99 <br />70 130 <br />Sample ID: 013050721- 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 <br />70 130 3.0 <br />10 <br />Method: E245.1 <br />Batch: R174153 <br />Sample ID: IPC <br />Instrument Performance Check <br />Sample <br />Run: CVAA_C203_130529A <br />05/29/13 15:33 <br />Mercury <br />000511 mg /L <br />0.00020 <br />102 <br />95 105 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 19 of 31 <br />