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• ? www.energylab.com i Helena, W 877-472-0711 . Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />(\j?'`? ArwlyticatExcetlsneeStnco 1AiT Gillette, WY 866-666-7175 • Rapid City, SD 888-672-1225 m College Station, Tx 888-690-2218 <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 />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA-05 Batch: RA228-3342 <br />Sample ID: LCS-228-RA226-4751 Laboratory Control Sample Run: TENNELEC-3_100826A 09/03/10 12:17 <br />Radium 228 8.11 pCi/L 106 70 130 <br />Sample ID: MB-RA226-4751 3 Method Blank Run: TENNELEC-3_100826A 09/03/10 12:17 <br />Radium 228 0.268 pCi/L U <br />Radium 228 precision (±) 0.666 pCi/L <br />Radium 228 MDC 1.10 pCi/L <br />Sample ID: C10080893-001CMS Sample Matrix Spike Run: TENNELEC-3_100826A 09/03/10 12:17 <br />Radium 228 16.6 pCi/L 101 70 130 <br />Sample ID: C10080893-001CMSD Sample Matrix Spike Duplicate Run: TENNELEC-3_100826A 09/03/10 12:18 <br />Radium 228 15.9 pCi/L 97 70 130 4.2 33.6 <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 5 of 8