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• www.energylab.mm Helena, MT B77-472-0711 • Billings, MT 800-735-4489 = Casper, WY 888-235-0515 <br />Aatry I Excahace Since 1152 Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 + College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 09/16/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: 010080658 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 Batch: 27171 <br />Sample ID: MB-27171 Method Blank Run: ICPMS2-C_100826A 08/27/10 12:46 <br />Antimony 0.0002 mg/L 0.0002 <br />Sample ID: LCS3-27171 Laboratory Control Sample Run: ICPMS2-C-100826A 08/27/10 12:52 <br />Antimony 0.610 mg/L 0.050 122 85 115 S <br />- Response for Antimony is above standard QA limit. This could indicate a high bias for the sample results. Since there were no detectable analyte responses, and the <br />remainder of the run QA is within acceptance range, this batch is approved. <br />Sample ID: C10080720-001AMS3 Sample Matrix Spike Run: ICPMS2-C_100826A 08/27/10 13:26 <br />Antimony 0.591 mg/L 0.050 118 70 130 <br />Sample ID: C10080720-001AMSD Sample Matrix Spike Duplicate Run: ICPMS2-C_100826A 08/27/10 13:32 <br />Antimony 0.602 mg/L 0.050 120 70 130 1.8 20 <br />Method: E200.8 Batch: R136740 <br />Sample ID: LRB 2 Method Blank Run: ICPMS2-C_100901A 09/01/10 12:04 <br />Antimony ND mg/L 7E-05 <br />Uranium ND mg/L 1E-05 <br />Sample ID: LFB 2 Laboratory Fortified Blank Run: ICPMS2-C_100901A 09/01/10 12:11 <br />Antimony 0.0514 mg/L 0.0010 103 85 115 <br />Uranium 0.0506 mg/L 0.00030 101 85 115 <br />Sample ID: C10081049-018AMS4 2 Sample Matrix Spike Run: ICPMS2-C_100901A 09/01/10 23:40 <br />Antimony 0.554 mg/L 0.050 110 70 130 <br />Uranium 87.6 mg/L 0.00030 70 130 A <br />Sample ID: C10081049-018AMSD 2 Sample Matrix Spike Duplicate Run: ICPMS2-C_100901A 09/02/10 00:13 <br />Antimony 0.580 mg/L 0.050 116 70 130 4.7 20 <br />Uranium 88.7 mg/L 0.00030 70 130 1.2 20 A <br />Qualifiers: <br />RL - Analyte reporting limit. <br />ND - Not detected at the reporting limit. <br />S - Spike recovery outside of advisory limits. <br />A - The analyte level was greater than four times the spike level. In <br />accordance with the method % recovery is not calculated. <br />MDC - Minimum detectable concentration <br />Page 12 of 25