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wwwxtre4o.com <br />Air Wf wAmX=IW <br />77472-0711 • Billings, MT 800-735-4439 • Gasper, WY 8*235-1515 <br />F 75 f ?' Rapi d C tY, SD 888-672-1225 • College Station, Tx 8lB-61D-221x! <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine Monitoring Program-Discharge <br />Analyte Count Result Units <br />Method: A2540 C <br />Sample ID: MBLK1_101123 Method Blank <br />Solids, Total Dissolved TDS @ 180 C ND mg/L <br />Sample ID: LCS1_101123 Laboratory Control Sample <br />Solids, Total Dissolved TDS @ 180 C 986 mg/L <br />Sample ID: C10110835-001JMS Sample Matrix Spike <br />Solids, Total Dissolved TDS @ 180 C 2640 mg/L <br />Sample ID: C10110835-001JMSD Sample Matrix Spike Duplicate <br />Solids, Total Dissolved TDS @ 180 C 2600 mg/L <br />Report Date: 12/28/10 <br />Work Order: C10110835 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: 1011231 SLDS-TDS-W <br />Run: BAL-1 101123A 11/23/10 16:41 <br />10 <br />Run: BAL-1_101123A 11/23/10 16:41 <br />10 99 90 110 <br />Run: BAL-1 101123A 11/23/10 16:43 <br />10 105 90 110 <br />Run: BAL-1 101123A 11/23/10 16:44 <br />10 103 90 110 1.6 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 5 of 23 <br />