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.) www.energylab.com Helena, MT 877-472-0711 - Billings, MT 800-735-4489 - Casper, WY 888-235-0515 <br />o Aesty(lce/frealence&We 1151 ? Gillette, WY 866-686-7175 - Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Report Date: 09/09/10 <br />Work Order: C10080639 <br /> <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: A2540 C Batch: 100819_1_SLDS-TDS-W <br />Sample ID: MBLK1_100819 Method Blank Run: BAL-1 _100819A 08/19/10 11:18 <br />Solids, Total Dissolved TDS @ 180 C ND mg/L 10 <br />Sample ID: LCS1_100819 Laboratory Control Sample Run: BAL-1 _100819A 08/19/10 11:18 <br />Solids, Total Dissolved TDS @ 180 C 1000 mg/L 10 100 90 110 <br />Sample ID: C10080653-003AMS Sample Matrix Spike Run: BAL-1 _100819A 08/19/10 11:21 <br />Solids, Total Dissolved TDS @ 180 C 2500 mg/L 10 102 90 110 <br />Sample ID: C10080653-003AMSD Sample Matrix Spike Duplicate Run: BAL-1 _100819A 08/19/10 11:22 <br />Solids, Total Dissolved TDS @ 180 C 2480 mg/L 10 101 90 110 0.8 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 21