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www.energylab.com Helena, IAT 877.472-0711 - Billings MT 800-735-4489 a Caspot. WY 888-235-0515 <br />II ?. Analykal;:xceleeeSince 1151 Gllletta, WY 866-686-7175 - Rapid City, SO $88-672-1225 - College Station, TX 888-690.2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Dale: 01/06/11 <br />Project: Schwartzwalder Water Monitoring Program - Ground W Work Order: 010110899 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E900.0 Batch: GrAB-1012 <br />Sample ID: MB-GrAB-1012 6 Method Blank Run: G542M_101201A 12/02/10 21:27 <br />Gross Alpha -1.9 pCi/L U <br />Gross Alpha precision (t) 0.69 pCi/L <br />Gross Alpha MDC 0.87 pCUL <br />Gross Bela -2.1 pCi/L U <br />Gross Beta precision (±) 1.3 pCUL <br />Gross Bela MDC 1.4 pCi/L <br />Sample ID: Th230-GrAB-1012 Laboratory Control Sample Run: G542M_101201A 12102/10 21:27 <br />Gross Alpha 110 pCUL 110 70 130 <br />Sample ID: C10110686.001HDUP 6 Sample Duplicate Run: G542M_101201A 12102110 21:28 <br />Gross Alpha -5.35 pCi/L 260 189.6 UR <br />Gross Alpha precision (±) 3.22 pCi/L <br />Gross Alpha MDC 6.03 pCi/L <br />Gross Beta 4.08 pCi/L 89 92.1 U <br />Gross Bela precision (±) 3.26 pCi/L <br />Gross Beta MDC 5.34 pCi/L <br />- For Gross Alpha the Sample and the Duplicate are both below the MDC; the RPD is acceptable. <br />Sample ID: Cl 0110899-001 FMS Sample Matrix Spike Run: G542M_101201A 12/03/10 09:38 <br />Gross Alpha 2930 pCUL 344 70 130 S <br />- Sample response is much larger than spike amount, therefore small variances in the sample adv ersely affected the recovery. The LCS and the RPD of the MS/MSD pair <br />meets acceptance criteria; this batch is approved. <br />Sample ID: 010110899-001 FMSD Sample Matrix Spike Duplicate Run: G542M__101201 A 12/03/10 09:38 <br />Gross Alpha 2840 pCi/L 259 70 130 3.2 11.9 S <br />Sample ID: C10110899-001FMS Sample Matrix Spike Run: G542M_l01201A 12103/10 09:38 <br />Gross Bela 530 pCi/L 143 70 130 S <br />- Sample response is much larger than spike amount, therefore small variances in the sample adv ersely affected the recovery. The LCS and the RPD of the MSIMSD pair <br />meets acceptance criteria; this batch is approved. <br />Sample ID: C10110899.001FMSD Sample Matrix Spike Duplicate Run: 6542M_101201A 12103110 09:38 <br />Gross Beta 515 pCi/L 126 70 130 2.9 12.2 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration R - RPD exceeds advisory limit. <br />S - Spike recovery outside of advisory limits. U - Not detected at minimum detectable concentration <br />Page 17 of 23