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I al kLI :1 CA www.enerdab.com Helena, MT 677-472-0711 • Billings, MT 800-735-4409 • Casper, WY 888435-0515 <br />rRiY Gillette, wY 866-686-7175 • Rapid City, SO 886-672-1225 • College Station, T% 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 12/02/10 <br />Project: Schwartzwalder Water Monitoring Program - SW Work Order: C10101123 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 <br /> Batch: RA226-4959 <br />Sample ID: 010101041-008DMS Sample Matrix Spike Run: BERTHOLD 770-1 101103B 11/11/10 11:45 <br />Radium 226 18.6 pCi/L _ <br />115 70 130 <br />Sample ID: 010101041-008DMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770-1_ 1011036 11/11/10 11:45 <br />Radium 226 20.1 pCi/L 125 70 130 7.7 24.6 <br />Sample ID: MB-RA226-4959 3 Method Blank Run: BERTHOLD 770-1 1011036 11/11/10 13:18 <br />Radium 226 -0.1 pCi/L _ <br /> <br />Radium 226 precision (±) <br />0.09 pCi/L U <br />Radium 226 MDC 0.2 pCi/L <br />Sample ID: LCS-RA226-4959 Laboratory Control Sample Run: BERTHOLD 770-1 101103B 11/11/10 13:18 <br />Radium 226 11 pCi/L _ <br />141 70 130 S <br />- LCS response is outside of the acceptance range for this analysis. Since the MB, MS , and MSD are acceptable the batch is approved . <br />metnoa: E903.0 Batch: RA226-4963 <br />Sample ID: C10101068-010AMS Sample Matrix Spike Run: BERTHOLD 770-2 <br />101103B 11/11/10 22:09 <br />Radium 226 26 pCi/L _ <br />81 70 130 <br />Sample ID: C10101068-010AMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770-2 <br />101103B 11/11/10 22:09 <br />Radium 226 24 pCi/L _ <br />63 70 130 11 21.3 S <br />- Sample response is much larger than spike amount, therefore small variances in the sample adversely affected the recovery. The LCS and the RPD of the MS/MSD <br />air <br />meets acceptance criteria; this batch is approved. p <br />Sample ID: MB-RA226-4963 3 Method Blank Run: BERTHOLD 770-2 <br />1011036 11/11/10 23:49 <br />Radium 226 -0.1 pCi/L _ <br /> <br />Radium 226 precision (±) <br />0.07 pCi/L U <br />Radium 226 MDC 0.2 pCi/L <br />Sample ID: LCS-RA226-4963 Laboratory Control Sample Run: BERTHOLD 770-2 <br />101103B 11/11/10 23:49 <br />Radium 226 7.9 pCi/L _ <br />102 70 130 <br />metnoa: taU3.U <br />Sample ID: 010101123-001 FMS <br />Radium 226 <br />Sample ID: C10101123-001 FMSD <br />Radium 226 <br />Sample ID: MB-RA226.4995 <br />Radium 226 <br />Radium 226 precision (±) <br />Radium 226 MDC <br />Sample ID: LCS-RA226-4995 <br />Radium 226 <br />Sample Matrix Spike <br />16 pCi/L <br />Sample Matrix Spike Duplicate <br />14 pCi/L <br />3 Method Blank <br />-0.1 pCi/L <br />0.1 pCi/L <br />0.2 pCi/L <br />Laboratory Control Sample <br />7.4 pCi/L <br />Batch: RA226-4995 <br />Run: BERTHOLD 770-2_101112B 11/24/10 11:15 <br />97 70 130 <br />Run: BERTHOLD 770-2_101112B 11/24/10 11:15 <br />84 70 130 14 24.1 <br />Run: BERTHOLD 770-2_1011126 11/24/10 13:03 <br />U <br />Run: BERTHOLD 770-2_1011126 11/24/10 13:03 <br />96 70 130 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />U - Not detected at minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />S - Spike recovery outside of advisory limits. <br />Page 26 of 37