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wxw.enargylab.com Helena, MT 877-472-0711 - Billings, MT 800-735-4489 Casper, WY 888-235-0515 <br />El AmtyPinalExretlanceSince 1952 Gillette, WY 865-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 868-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 12/15/10 <br />Project: Schwartzwalder Water Sampling Program-Ground Water Work Order: C10110379 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qua[ <br />Method: A2540 C <br />Sample ID: MBLK1_101110 Method Blank <br />Solids, Total Dissolved TDS @ 180 C ND mg/L <br />Sample ID: LCS1_101110 Laboratory Control Sample <br />Solids, Total Dissolved TDS @ ISO C 1000 mg/L <br />Sample ID: C10110379-001 AMS Sample Matrix Spike <br />Solids, Total Dissolved TDS @ 180 C 2250 mg/L <br />Sample ID: C l 0110379-001 AMSD Sample Matrix Spike Duplicate <br />Solids, Total Dissolved TDS @ 180 C 2220 mg/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum delectable concentration <br />Batch: 1011101 _SLDS-TDS-W <br />Run: BAL-1 1011108 11/10/1009:50 <br />10 <br />Run: BAL-1 1011108 11/10/1009:50 <br />10 100 90 T 110 <br />Run: BAL-1_101110B 11/10/10 09:54 <br />10 102 90 110 <br />Run: BAL-1 101110B 11/10/1009:54 <br />10 101 90 110 1.2 10 <br />ND - Not detected at the reporting limit. <br />Page 6 of 21