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wwwx*Wab.com <br />ANOWLW Maf8oc IM <br />1 + Billings, MT 160-735-44e9 • Gasper, WY a66-235-0515 <br />City, SD 816-672-1225 • Goliege Station, TX 818=690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 04/01/11 <br />Project: Schwartz SW 03/01/1 1 S25651-S25658 Work Order: C11030134 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA-05 Batch: RA228-3630 <br />Sample ID: LCS-228-RA226-5225 Laboratory Control Sample Run: TENNELEC-3_11031 OD 03/16/11 12:21 <br />Radium 228 7.76 pCi/L 114 80 120 <br />Sample ID: MB-RA226-5225 3 Method Blank Run: TENNELEC-3_11031 OD 03/16/11 12:21 <br />Radium 228 -0.2 pCi/L U <br />Radium 228 precision (±) 0.7 pCi/L <br />Radium 228 MDC 1 pCi/L <br />Sample ID: C11030134-008FMS Sample Matrix Spike Run: TENNELEC-3_11031 OD 03/16/11 12:21 <br />Radium 228 16.0 pCi/L 112 70 130 <br />Sample ID: C11030134-008FMSD Sample Matrix Spike Duplicate Run: TENNELEC-3_110310D 03/16/11 12:21 <br />Radium 228 13.6 pCi/L 95 70 130 17 36.3 <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 33 of 43 <br />