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wvrw.energylah.com I Helena, Aarndcal Excelfrasa Sinca 1952 MT 877.472-0711 • Billings MT 800-735-4489 • Casper, WY 888-235-0515 <br />j <br />Gillette, WY 866-686-7175 11 Rapid City, SD 888-872-1225 College Station, Tx 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 12/15/10 <br />Project: Schwartzwalder Water Sampling Program-Ground Wa ter Work Order: C10110379 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimil Qual <br />Method: E200.8 Balch: R140588A <br />Sample ID: C10110379-001 CMS4 6 Sample Matrix Spike Run: ICPMS4-C_101203A 12/04/10 08:52 <br />Antimony 0.0551 mg/L 0.050 110 70 130 <br />Copper 0.0518 mg/L 0.010 101 70 130 <br />Molybdenum 0.0639 mg/L 0.0010 99 70 130 <br />Thallium 0.0508 mg/L 00010 102 70 130 <br />Uranium 0.308 mg/L 0.00030 70 130 A <br />Zinc 0.0643 mg/L 0.010 109 70 130 <br />Sample ID: C1 0110379-001 CMSD 6 Sample Matrix Spike Duplicate Run: ICPMS4-C_101203A 12/04/10 09:26 <br />Antimony 0.0580 mg/L 0.050 116 70 130 5.2 20 <br />Copper 0.0533 mg/L 0.010 104 70 130 2.8 20 <br />Molybdenum 0.0665 mg/L 0.0010 104 70 130 4.0 20 <br />Thallium 0.0523 mg/L 0.0010 105 70 130 2.8 20 <br />Uranium 0.307 mg/L 0.00030 70 130 0.3 20 A <br />Zinc 0.0615 mg/L 0.010 104 70 130 4.5 20 <br />Sample ID: LRB 6 Method Blank Run: ICPMS 4-C_101203A 12/03/101314 <br />Antimony 0.001 mg/L 0.0002 <br />Copper 0.0001 mg/L 6E-05 <br />Molybdenum 0.0003 mg/L 8E-05 <br />Thallium ND mg/L 2E-05 <br />Uranium ND mg/L 8E-06 <br />Zinc 0.0006 mg/L 0.0001 <br />Sample ID: LFS 6 Laboratory Fonified Blank Run: ICPMS 4-C_101203A 12/03/10 13-21 <br />Antimony 0.0620 mg/L 0.0010 121 85 115 S <br />Copper 0.0554 mg/L 0.0010 111 85 115 <br />Molybdenum 0.0547 mg/L 0.0010 109 85 115 <br />Thallium 0.0550 mg/L 0.0010 110 85 115 <br />Uranium 0.0547 mg/L 0.00030 109 85 115 <br />Zinc 0.0580 mg/L 0.0010 115 85 115 <br />- Response for Antimony is above stand ard QA limit. This could indicate a high bia s for the sample result s. Since there were no delectable analyte responses. and the <br />remainder of the run QA is within accept ance range. this batch is approved. <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 analyle level was greater than lour limes the spike level. In <br />accordance with the method % recovery is not calculated. <br />MOC - Minimum detectable concentration <br />Page 11 of 21