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W A0&AW&C&N=wMw ' www.enerdab.com Helena, MT 677472-0711 • Billings, MT 800-7354489 • Casper, WY 888-235-0515 <br />-.090, f rrtst Gillette, wY 866-686-7175 • Rapid City, SD 886-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program SW <br />Analyte Count Result Units <br />Method: A2540 C <br />Sample ID: MBLK1_101028 Method Blank <br />Solids, Total Dissolved TDS @ 180 C ND mg/L <br />Sample ID: LCS1_101028 Laboratory Control Sample <br />Solids, Total Dissolved TDS @ 180 C 1010 mg/L <br />Sample ID: C10101020-001AMS Sample Matrix Spike <br />Solids, Total Dissolved TDS @ 180 C 2440 mg/L <br />Sample ID: 010101020-001AMSD Sample Matrix Spike Duplicate <br />Solids, Total Dissolved TDS @ 180 C 2480 mg/L <br /> Report Date: 11/29/10 <br /> Work Order: C10101013 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> Batch: 101028 1 SLDS-TDS-W <br /> Run: BAL-1 _101028A 10/28/10 08:58 <br />10 <br /> Run: BAL-1 _101028A 10/28/10 08:58 <br />10 101 90 110 <br /> Run: BAL-1_ 101028A 10/28/10 09:04 <br />10 98 90 110 <br /> Run: BAL-1_ 101028A 10/28/10 09:04 <br />10 98 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 9 of 32