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WwOffewab.com <br />A?tla1.F?+?rai+faeo tl16t <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />72-0719 • Billings, MT 160-735-4469 • Casper,,WY888-235-0515 <br />Yt?2api'd City, SD 861-672-1225 • Cogege Station, TX 688-690-2218 <br />Client: Cotter Corporation Report Date: 04/11 /11 <br />Project: Schwartz-SW 3/10/2011 S25686-S25688 Work Order: C11030378 <br />FAnalyt, Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA-05 Batch: RA228-3642 <br />Sample ID: LCS-228-RA226-5247 Laboratory Control Sample Run: TENNELEC-3-110318D 03/29/11 12:00 <br />Radium 228 7.1 pCi/L 98 80 120 <br />Sample ID: MB-RA226-5247 <br />Radium 228 <br />Radium 228 precision (±) <br />Radium 228 MDC <br />Sample ID: C11030474-001DMS <br />Radium 228 <br />3 Method Blank <br />0.32 pCi/L <br />0.67 pCi/L <br />1.1 pCi/L <br />Run: TENNELEC-3_110318D 03/29/11 12:00 <br />U <br />Run: TENNELEC-3 110318D 03/29/11 12:00 <br />96 70 130 <br />Run: TENNELEC-3-110318D 03/29/11 12:00 <br />88 70 130 7.1 31.5 <br />Sample Matrix Spike <br />15 pCi/L <br />Sample ID: C11030474-001 DMSD Sample Matrix Spike Duplicate <br />Radium 228 14 pCi/L <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration U - Not detected at minimum detectable concentration <br />Page 23 of 29 <br />