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J:JkIl C?CIJ®R.9- -4nergylab.tom J Helena, MT 877472-1117111 • Billings, MT OOO-735-4489 • Casper, WY 868-235-0515 . <br />An&"E>arhaerAm IN2 Gillette, WY 868.688-1175 • Rapid City, So 880-672-1225 • College Station, TX 888480-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11 /11 /10 <br />Project: Schwartzwalder Water Monitoring Program-Discharge Work Order: C10100223 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA-05 Batch: RA228-3439 <br />Sample ID: LCS-228-RA226-4899 Laboratory Control Sample Run: TENNELEC-3_101014A 10/21/10 14:14 <br />Radium 228 7.6 pCi/L 107 70 130 <br />Sample ID: MB-RA226-4899 3 Method Blank Run: TENNELEC-3_101014A 10/21/10 14:14 <br />Radium 228 -0.3 pCi/L U <br />Radium 228 precision (±) 0.8 pCi/L <br />Radium 228 MDC 1 pCi/L <br />Sample ID: 010100103-002DMS Sample Matrix Spike Run: TENNELEC-3_101014A 10/21/10 14:14 <br />Radium 228 15 pCi/L 103 70 130 <br />Sample ID: C1 01001 03-002DMSD Sample Matrix Spike Duplicate Run: TENNELEC-3_101014A 10/21/10 14:14 <br />Radium 228 16 pCi/L 113 70 130 9.2 34.9 <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 5 of 8