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www.elw&ab.com ( Helena, MT 817- 472 -0711 • Billings, MT 600- 735 -4489 • Casper, WY 888- 235 -1515 <br />- Aaarytlrslfixa.aarSAaca ,8i? Gillette, WY 866 -686 -7175 • Rapid City, SD 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: 08/05/13 <br />Project: Schwartz GW 6/28/13 S27040 Work Order: 013070012 <br />Analyte Count Result Units RL ° /GREC Low Limit High Limit RPD RPDLimit Qual <br />Method: E245.1 Analytical Run: CVAA_C203_130706A <br />Sample ID: ICV Initial Calibration Verification Standard 07/06/13 1301 <br />Mercury 0.00537 mg /L 0.00010 107 90 110 <br />Method: <br />Sample ID: <br />Mercury <br />E245.1 <br />IPC <br />Instrument Performance Check Sample <br />0.00519 mg /L 0.00010 <br />104 <br />Run: CVAA_C203_130706A <br />95 105 <br />Batch: 130706A <br />07/06/13 13:04 <br />Method: <br />E245.1 <br />Batch: 38140 <br />Sample ID: <br />MB -38140 <br />Method Blank <br />Run. CVAA_C203_130706A <br />07/06/13 13:07 <br />Mercury <br />ND mg /L <br />7E -05 <br />Sample ID: <br />LCS -38140 <br />Laboratory Control Sample <br />Run: CVAA_C203_130706A <br />07/06/13 13:11 <br />Mercury <br />0.00528 mg /L <br />0.00010 <br />105 <br />85 115 <br />Sample ID: <br />C13061080- 00lDMS <br />Sample Matrix Spike <br />Run: CVAA_C203_130706A <br />07/06/13 13:22 <br />Mercury <br />0.00540 mg /L <br />0.00010 <br />108 <br />70 130 <br />Sample ID: <br />C13061080- 00lDMSD <br />Sample Matrix Spike Duplicate <br />Run: CVAA_C203_130706A <br />07/06/13 13:24 <br />Mercury <br />0.00535 mg /L <br />0.00010 <br />107 <br />70 130 0.9 <br />10 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 13 of 21 <br />