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www.ew#ab.com M° } He(ena M1671-02-0711 • Billings, Mf BQO-133-4189 • Casper,lNY8A8-233-OS1S <br />R ° 6 626:7175 • D' <br />rty so AAA-672 1223 • toll St C Tx 889-A9A-99is <br />i;a c <br />e, ?, ap, ege a ton, <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 03/01/11 <br />Project: Schwartz GW 01/27/10 S25575-S25576 Work Order: C11010885 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226-5168 <br />Sample ID: C11020006-001 EMS Sample Matrix Spike Run: BERTHOLD 770-2_110208A 02/14/11 21:47 <br />Radium 226 13.6 pCi/L 105 70 130 <br />Sample ID: C1 1020006-001 EMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770-2_110208A 02/14/11 21:47 <br />Radium 226 13.7 pCi/L 105 70 130 0.1 29.5 <br />Sample ID: MB-RA226-5168 3 Method Blank Run: BERTHOLD 770-2_110208A 02/15/11 01:06 <br />Radium 226 -0.12 pCi/L U <br />Radium 226 precision (±) 0.091 pCi/L <br />Radium 226 MDC 0.23 pCi/L <br />Sample ID: LCS-RA226-5168 Laboratory Control Sample Run: BERTHOLD 770-2_110208A 02/15/11 01:06 <br />Radium 226 6.0 pCi/L 97 70 130 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 19 of 24