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• www.enerdeb.com Helena, MT 877472-0711 • Billings, MT 600-735-4489 • Casper, WY 888-235-1515 <br />AuljrfariJxaraasme. IM J Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-691-2218 <br />QA/QC Summary Report <br />Revised Date: 11/23/10 <br />Client: Cotter Corporation Report Date: 11 /12/10 <br />Project: Schwartzwalder Water Monitoring Program Discharge Work Order: C10100590 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA-05 Batch: RA228-3464 <br />Sample ID: LCS-228-RA2264934 Laboratory Control Sample Run: TENNELEC-3_101025B 11/03/10 10:16 <br />Radium 228 8.0 pCi/L 94 70 130 <br />Sample ID: MB-RA226-4934 3 Method Blank Run: TENNELEC-3_101025B 11/03/10 10:16 <br />Radium 228 1 pCi/L U <br />Radium 228 precision (±) 1.0 pCi/L <br />Radium 228 MDC 2 pCi/L <br />Sample ID: C10100569-002DMS Sample Matrix Spike Run: TENNELEC-3_101025B 11/03/10 10:16 <br />Radium 228 15 pCi/L 86 70 130 <br />Sample ID: C10100569-002DMSD Sample Matrix Spike Duplicate Run: TENNELEC-3_101025B 11/03/10 10:16 <br />Radium 228 15 pCi/L 83 70 130 2.6 41.2 <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 18 of 22