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ENERGY <br />Client: Cotter Corporation <br />Project: Schwartz GW 9/22/11 S26016 <br />www.enagylab.com Helena, MT 877 - 472 - 0711 • Billings, MT 800 - 735 - 4489 • Casper, WY 888 - 235 - 0515 <br />AearyGeJFaeeelna.Sine lit Gillette, WY 866 -686 -7175 • Rapid City, SO 888 - 672 -1225 • College Station, Tx 888 -690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Report Date: 10/31/11 <br />Work Order: C11090956 <br />Analyte <br />Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E200.8 <br />Sample ID: LRB <br />Antimony <br />Arsenic <br />Copper <br />Lead <br />Manganese <br />Thallium <br />6 Method Blank <br />ND mg /L <br />ND mg /L <br />ND mg /L <br />ND mg /L <br />ND mg /L <br />ND mg /L <br />4E -05 <br />0.0001 <br />7E -05 <br />9E-05 <br />3E-05 <br />1E-05 <br />Run: ICPMS2- C_111017A <br />Batch: R152077 <br />10/17/11 23:00 <br />Sample ID: LFB 6 Laboratory Fortified Blank Run: ICPMS2- C_111017A 10/17/11 23:06 <br />Antimony 0.0542 mg /L 0.0010 108 85 115 <br />Arsenic 0.0548 mg /L 0.0010 109 85 115 <br />Copper 0.0547 mg /L 0.0010 109 85 115 <br />Lead 0.0538 mg /L 0.0010 108 85 115 <br />Manganese 0.0536 mg /L 0.0010 107 85 115 <br />Thallium 0.0533 mg /L 0.0010 107 85 115 <br />Sample ID: C11090956 -001 DMS4 6 Sample Matrix Spike Run: ICPMS2- C_111017A 10/19/11 01:07 <br />Antimony 0.0561 mg /L 0.050 112 70 130 <br />Arsenic 0.0548 mg /L 0.0010 110 70 130 <br />Copper 0.0534 mg /L 0.010 98 70 130 <br />Lead 0.0541 mg /L 0.050 108 70 130 <br />Manganese 0.0508 mg /L 0.010 101 70 130 <br />Thallium 0.0542 mg /L 0.0010 108 70 130 <br />Sample ID: C11090956 -001 DMSD 6 Sample Matrix Spike Duplicate Run: ICPMS2- C_111017A 10/19/11 01:41 <br />Antimony 0.0551 mg /L 0.050 110 70 130 1.9 20 <br />Arsenic 0.0550 mg /L 0.0010 110 70 130 0.4 20 <br />Copper 0.0540 mg /L 0.010 100 70 130 1.1 20 <br />Lead 0.0534 mg /L 0.050 107 70 130 1.3 20 <br />Manganese 0.0503 mg /L 0.010 100 70 130 1.0 20 <br />Thallium 0.0534 mg /L 0.0010 107 70 130 1.7 20 <br />Method: E200.8 Batch: R152269 <br />Sample ID: LRB Method Blank Run: ICPMS2- C_111020A 10/20/11 18:52 <br />Silver 2E -05 mg /L 1 E -05 <br />Sample ID: LFB Laboratory Fortified Blank Run: ICPMS2- C_111020A 10/20/11 18:59 <br />Silver 0.0208 mg /L 0.0010 104 85 115 <br />Sample ID: C11100013- 002DMS4 Sample Matrix Spike Run: ICPMS2- C_111020A 10/21/11 17:00 <br />Silver 0.0157 mg /L 0.010 79 70 130 <br />Sample ID: 011100013- 002DMSD Sample Matrix Spike Duplicate Run: ICPMS2- C_111020A 10/21/11 17:07 <br />Silver 0.0178 mg /L 0.010 89 70 130 12 20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 8 of 20 <br />