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w+rw.erktgylabcom `eaIe6a, hT K77-472-0711 • Billings, MT 500-73'5.4469 • Casper,WY888-235-0515 <br />AuB,uarDcWs w5= t:ai 866 °i86 :7175 4Iapid City, SO 886-672-1225 • College Station, TX 888-610-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 03/01/11 <br />Project: Schwartz GW 01/27/1 0 S25575-S25576 Work Order: C11010885 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E245.1 Batch: 28957 <br />Sample ID: MB-28957 Method Blank Run: CVAA C203 110207A 02/07/11 12:33 <br />Mercury ND mg/L 0.00010 <br />Sample ID: LCS-28957 Laboratory Control Sample Run: CVAA_C203_110207A 02/07/11 12:34 <br />Mercury 0.00485 mg/L 0.00010 97 90 110 <br />Sample ID: C11010885-001 DMS Sample Matrix Spike Run: CVAA_C203_110207A 02/07/11 12:39 <br />Mercury 0.00488 mg/L 0.00010 97 85 115 <br />Sample ID: C11010885-001 DMSD Sample Matrix Spike Duplicate Run: CVAA_C203_110207A 02/07/11 12:40 <br />Mercury 0.00484 mg/L 0.00010 97 85 115 0.8 10 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 14 of 24 <br />