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• vaw.energy ab.com Helena, MT 877-472-0711 . Billings, IdT 800-735-4489 • Casper, WY 888-235-0515 <br />_ Awfocal [=VenceSlace 1951 Gillette WY 866-686-7175 + Rapid City, SD 888-672-1225 a College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 10/04/10 <br />Project: Schwartzwalder Water Monitoring Program-Discharge Work Order: C10090551 <br />Analyle Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qua[ <br />Method: E903.0 Batch: RA226-4801 <br />Sample ID: C10090551-001EDUP 3 Sample Duplicate Run: BERTHOLD 770-1_100916A 09/22/10 14:29 <br />Radium 226 3.3 pCi/L 7.2 35.4 <br />Radium 226 precision (±) 0.44 pCi/L <br />Radium 226 MDC 0.25 pCi/L <br />Sample ID: C1 0 0 905 51-001EMS Sample Matrix Spike Run: BERTHOLD 770-1_100916A 09/22110 14:29 <br />Radium 226 20 pCi/L 105 70 130 <br />Sample ID: MB•RA226-4801 3 Method Blank Run: BERTHOLD 770-1_100916A 09/22/10 17:05 <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 />Sample ID: LCS-RA226-4801 Laboratory Control Sample Run: BERTHOLD 770.1_100916A 09122/110 17:05 <br />Radium 226 7.9 pCi/L 102 70 130 <br />Method: E903.0 <br />Sample 1D: C10090355-006FMS Sample Matrix Spike <br />Radium 226 19 pCi/L <br />Sample ID: C10090551-001FDUP 3 Sample Duplicate <br />Radium 226 3.2 pCi/L <br />Radium 226 precision (±) 0.39 pCi/L <br />Radium 226 MDC 0.19 pCi/L <br />Sample ID: MB-RA226.4802 3 Method Blank <br />Radium 226 -0.08 pCi/L <br />Radium 226 precision (±) 0.09 pCi/L <br />Radium 226 MDC 0.2 pCUL <br />Sample ID: LCS-RA226.4802 Laboratory Con trol Sample <br />Radium 226 9.8 pCi/L <br />Qualifiers: <br />RL - Analyle reporting limit. <br />MDC - Minimum detectable concentration <br />Batch: RA226-4802 <br />Run: BERTHOLD 770-1_100916C 09129110 13:03 <br />111 70 130 <br />Run: BERTHOLD 770-1100916C 09129/10 13:03 <br />4.3 33.9 <br />Run: BERTHOLD 770-1 100916C 09129/10 14:53 <br />U <br />Run: BERTHOLD 770-1100916C 09129/10 14:53 <br />125 70 130Y <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 16 of 22