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- www.energylab.com Helena, MT 877-472-0711 • Billings MT 800-735-4489 . Casper WY 888-235-0515 <br />Anarytica/Uvelleace since 1952 Gillette, WY 866-666-7175 • Rapid City, SD 886-672-1225 * College Station TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Report Date: 09/14/10 <br />Work Order: C10080305 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />l <br />Method: RA-05 Batch: RA228-3355 <br />Sample ID: LCS-228-RA226-4767 Laboratory Control Sample Run: TENNELEC-3_100901A 09/07/10 11:21 <br />Radium 228 8.0 pCi/L 107 70 130 <br />Sample ID: MB-RA226-4767 <br />Radium 228 <br />Radium 228 precision (±) <br />Radium 228 MDC <br />Sample ID: C10080884-002CMS <br />Radium 228 <br />3 Method Blank <br />0.08 pCi/L <br />0.7 pCi/L <br />1 pCi/L <br />Run: TENNELEC-3 100901A <br />09/07/10 11:21 <br />U <br />Sample Matrix Spike <br />18 pCi/L <br />Sample ID: C10080884-002CMSD Sample Matrix Spike Duplicate <br />Radium 228 16 pCi/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Run: TENNELEC-3 100901A <br />108 70 130 <br />Run: TENNELEC-3 100901A <br />96 70 130 11 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />09/07/10 11:21 <br />09/07/10 11:21 <br />33.5 <br />Page 17 of 21