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www.ene dab.=n ( Helena, MT 611472-0711 • Billings, MT 800-7354488 9 Casper, WY 886-236-0015 <br />r As*"Er #m=9= rtt3t J Gillette, wY 866-666-7175 • Rapid City, SD 188-672-1225 • College Station, T% 888-686-2218 <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: E903.0 Batch: RA226-4931 <br />Sample ID: 010100734-003DMS 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: 010100569-001 DMS <br />Radium 226 <br />Sample ID: C10100569-001 DMSD <br />Radium 226 <br />Sample ID: MB-RA226-4934 <br />Radium 226 <br />Radium 226 precision (±) <br />Radium 226 MDC <br />Sample ID: LCS-RA226-4934 <br />Radium 226 <br />Sample Matrix Spike <br />16 pCi/L <br />Sample Matrix Spike Duplicate <br />16 pCi/L <br />3 Method Blank <br />0.1 pCi/L <br />0.08 pCi/L <br />0.09 pCi/L <br />Laboratory Control Sample <br />8.1 pCi/L <br />Batch: RA226-4934 <br />Run: TENNELEC-3_101025D 11/09/10 00:21 <br />98 70 130 <br />Run: TENNELEC-3_101025D 11/09/10 00:21 <br />103 70 130 4.3 22.3 <br />Run: TENNELEC-3_101025D 11/09/10 16:32 <br />Run: TENNELEC-3_101025D 11/09/10 16:32 <br />101 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 16 of 22