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r watwenefgylab.com 472`0711 - Billings, MT 800-735-4469 a Casper 1YY866-235-0515 <br />677 <br />Aogy" Ecafto RM 1811 , <br />5 • Rapid City, So 888-672-1225,o college station, Tx 888-640-2216 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 03/04/11 <br />Project: Schwartz GW 02-09-11 S25579 Work Order: 011020422 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Batch: R143169 <br />Sample ID: LRB Method Blank Run: ICPMS2-C_110228A 02/28/11 13:50 <br />Silver ND mg/L 0.0010 <br />Sample ID: LFB Laboratory Fortified Blank Run: ICPMS2-C_110228A 02/28/11 13:56 <br />Silver 0.0223 mg/L 0.0010 112 85 115 <br />Sample ID: C1 1020612-001 EMS4 Sample Matrix Spike Run: ICPMS2-C_110228A 02/28/11 17:00 <br />Silver 0.018 mg/L 0.010 88 70 130 <br />Sample ID: C1 1020612-001 EMSD Sample Matrix Spike Duplicate Run: ICPMS2-C_110228A 02/28/11 17:07 <br />Silver 0.018 mg/L 0.010 88 70 130 0.3 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 11 of 22 <br />M?11'"