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www.energyiab.com Helena, Mf 877.472-0711 - Billings, MT 800-735-4489 = Casper, wY 888-235-0515 <br />Ar "ej/fxcerleacaSince 1932 Gillette, WY 866-686-7175 a Rapid City, SO 888-672-1225 a College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 01/05/11 <br />Project: Schwartzwalder Mine Monitoring Program-Surface Wat Work Order: C10110787 <br />Analyle Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qua[ <br />Method: E200.8 Batch: R140851 <br />Sample ID: LRB Method Blank Run: ICPMS2-C_101213A 12/13/10 12:38 <br />Uranium ND mg/L 1 E-05 <br />Sample ID: LFB Laboratory Fortified Blank Run: ICPMS2-C_101213A 12113/10 14:11 <br />Uranium 0.0559 mg/L 0.00030 112 85 115 <br />Sample ID: C10110506-001 BMS Sample Matrix Spike Run: ICPMS2-C_101213A 12/13/10 20:30 <br />Uranium 0.0597 mg/L 0.00030 104 70 130 <br />Sample ID: 010110506-001 BMSD Sample Matrix Spike Duplicate Run: ICPMS2-C_101213A 12/13/10 20:34 <br />Uranium 0.0620 mg/L 0.00030 109 70 130 3.8 20 <br />Method: E200.8 <br />Sample ID: C1 0110827-001 CMS4 2 Sample Matrix Spike Run: ICPMS4-C_101216A <br />Chromium 0.0257 mg/L 0.0010 51 70 130 <br />Silver 0.00123 mg/L 0,0010 6 70 130 <br />Sample ID: C10110827-001CMSD 2 Sample Matrix Spike Duplicate Run: ICPMS4-C._101216A <br />Chromium 0.0559 mg/L 0.0010 111 70 130 <br />Silver 0.00205 mg/L 0.0010 10 70 130 <br />Sample ID: LRB 2 Method Blank Run ICPMS4-C_101216A <br />Chromium ND mg/L 5E-05 <br />Silver ND mg/L 8E-05 <br />Sample ID: LFB 2 Laboratory Fortified Blank Run: ICPMS4-C 101216A <br />Chromium 0,0547 mg/L 0.0010 109 85 115 <br />Silver 0.0225 mg/L 0.0010 112 85 115 <br />Qualifiers: <br />RL - Analyle reporting limit. <br />MDC - Minimum detectable concentration <br />S - Spike recovery outside of advisory limits. <br />ND - Not detected al the reporting limit. <br />R - RPD exceeds advisory limit. <br />Balch: R141005A <br />12/17/10 02:28 <br />S <br />S <br />12/17/10 02:35 <br />74 20 R <br />50 20 SR <br />12/16/10 16:35 <br />12/16/10 16:43 <br />Page 15 of 30 <br />