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WWW-energylab.Cem Helena, MT 877472-0711 • Billings, MT 800-735-4488 • Casper, WY 888-235-0519 <br />IurytlarEtt t+na&'. fait Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-698-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Report Date: 11 /29/10 <br />Work Order: C10100734 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: A2540 C Batch: 101020_1_SLDS-TDS-W <br />Sample ID: MBLK1_101020 Method Blank Run: BAL-1 101020A 10/20/10 17:23 <br />Solids, Total Dissolved TDS @ 180 C ND mg/L 10 <br />Sample ID: LCS1_101020 Laboratory Control Sample Run: BAL-1 _101020A 10/20/10 17:24 <br />Solids, Total Dissolved TDS @ 180 C 1030 mg/L 10 103 90 110 <br />Sample ID: C10100734-003BMS Sample Matrix Spike Run: BAL-1 _101020A 10/20/10 17:35 <br />Solids, Total Dissolved TDS @ 180 C 2570 mg/L 10 103 90 110 <br />Sample ID: C10100734-003BMSD Sample Matrix Spike Duplicate Run: BAL-1_ 101020A 10/20/10 17:36 <br />Solids, Total Dissolved TDS @ 180 C 2590 mg/L 10 104 90 110 0.6 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 8 of 29