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www.energylab.com Helena, Mt 877-472-0711 a Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />- AMOWE cefis aSlnca tY3t Gillette, WY 866-666-7175 • Rapid City, SD OBB-672-1225 • College Station, TX 888-680-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Report Date: 11/29/10 <br />Work Order: C10100734 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226-4931 <br />Sample ID: C10100734-00313MS Sample Matrix Spike Run: BERTHOLD 770-1 _101022A 10/29/10 14:35 <br />Radium 226 21 pCi/L 122 70 130 <br />Sample ID: C10100734-003DMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770-1_ 101022A 10/29/10 14:35 <br />Radium 226 19 pCi/L 113 70 130 7.0 24.8 <br />Sample ID: LCS-RA226-4931 Laboratory Control Sample Run: BERTHOLD 770-1 101022A 10/29/10 14:35 <br />Radium 226 9.1 pCi/L 117 70 130 <br />Sample ID: MB-RA226-4931 3 Method Blank Run: BERTHOLD 770-1 101022A 10/29/10 14:35 <br />Radium 226 -0.1 pCi/L U <br />Radium 226 precision (±) 0.08 pCi/L <br />Radium 226 MDC 0.2 pCi/L <br />Method: E903.0 <br />Sample ID: C10100566-001 DMS <br />Radium 226 <br />Sample ID: C10100566-001 DMSD <br />Radium 226 <br />Sample ID: MB-RA226-4940 <br />Radium 226 <br />Radium 226 precision (±) <br />Radium 226 MDC <br />Sample ID: LCS-RA226-4940 <br />Radium 226 <br />Sample Matrix Spike <br />17.6 pCi/L <br />Sample Matrix Spike Duplicate <br />17.4 pCi/L <br />3 Method Blank <br />0.2 pCi/L <br />0.1 pCi/L <br />0.1 pCi/L <br />Laboratory Control Sample <br />9.6 pCi/L <br />Batch: RA226-4940 <br />Run: TENNELEC-3101027F 11/08/10 14:04 <br />106 70 130 <br />Run: TENNELEC-3_101027F 11/08/10 14:04 <br />105 70 130 0.9 23 <br />Run: TENNELEC-3_101027F 11/08/10 14:04 <br />Run: TENNELEC-3_101027F 11/08/10 14:04 <br />119 70 130 <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 22 of 29