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www.energylab.com Helena, MT 877-472-0711 a Billings, htT 800-735-4489 v Casper, WY 888-235-0515 <br />ry Maly GplfxwlJanceSnca 1552 I Gillette, WY 866-686-7175 o Rapid City, SO 888-672-1225 4 College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine Monitoring Program-Surface Wat <br />Analyte Count Result Units <br />Method: A2320 B <br />Sample ID: MBLK 2 Method Blank <br />Alkalinity, Total as CaC03 ND mg/L <br />Bicarbonate as HC03 ND mg/L <br />Sample ID: LCS Laboratory Control Sample <br />Alkalinity, Total as CaC03 208 mg/L <br />Sample ID: C10110787-002BDUP Sample Duplicate <br />Alkalinity, Total as CaC03 105 mg/L <br />Sample ID: C10110833-010CMS Sample Matrix Spike <br />Alkalinity, Total as CaC03 216 mg/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 01/05/11 <br />Work Order: C10110787 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Balch: R140349 <br />Run: MANTECH_101123A 11/23/10 16:26 <br />1 <br />1 <br />Run: MANTECH_101123A 11/23/10 16:41 <br />5.0 104 90 110 <br />Run: MANTECH_101123A 11/23110 17:21 <br />5.0 0.3 10 <br />Run: MANTECH__101123A 11/23/10 18:33 <br />5.0 104 80 120 <br />ND - Not detected at the reporting limit. <br />Page 7 of 30