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www-energylab.com Helena, MT 677-472-0711 Billings, MT 800-735-4489 • Casper, wY 888-235-0515 <br />An "celExcetienceSince tssl Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 . College Station, TX 668-690-2218 <br />...... _..._ . __.............. ..... _..._. ........ . .-- ............ <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program-Discharge <br />Report Date: 09/10/10 <br />Work Order: C10080893 <br />?A <br />l <br />C <br />t t R <br />lt U <br />it RL %REC L <br />Li <br />i <br />na <br />y <br />e oun <br />esu <br />n <br />s ow <br />m <br />t High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226-4751 <br />Sample ID: C10080753-007CMS Sample Matrix Spike Run: BERTHOLD 770-1 _100826C 09/09/10 11:08 <br />Radium 226 17 pCi/L 109 70 130 <br />Sample ID: C10080753-007CMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770-1 _100826C 09/09/10 11:08 <br />Radium 226 18 pCi/L 112 70 130 2.6 24.1 <br />Sample ID: MB-RA226-4751 3 Method Blank Run: BERTHOLD 770-1 100826C 09/09/10 12:49 <br />Radium 226 -0.093 pCi/L U <br />Radium 226 precision (±) 0.066 pCi/L <br />Radium 226 MDC 0.16 pCi/L <br />Sample ID: LCS-RA226-4751 Laboratory Control Sample Run: BERTHOLD 770-1_ 100826C 09/09/10 12:49 <br />Radium 226 8.7 pCi/L 112 70 130 <br />U <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 4 of 8