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Im- www.eee dab.com Helena, MT 877472-0711 •. Billings, MT 600-7354489 • Casper, WY 888-235-8515 <br />UnhweAM IM J Gilleft 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 Report Date: 11/17/10 <br />Project: Schwartzwalder Water Monitoring Program (S25247) Work Order: 010101008 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: A2540 C Batch: 101028 1 SLDS-TDS-W <br />Sample ID: MBLK1_101028 Method Blank Run: BAL-1 101028A 10/28/10 08:58 <br />Solids, Total Dissolved TDS @ 180 C ND mg/L 10 <br />Sample ID: LCS1_101028 Laboratory Control Sample Run: BAL-1 _101028A 10/28/10 08:58 <br />Solids, Total Dissolved TDS @ 180 C 1010 mg/L 10 101 90 110 <br />Sample ID: C10101020-001AMS Sample Matrix Spike Run: BAL-1 _101028A 10/28/10 09:04 <br />Solids, Total Dissolved TDS @ 180 C 2440 mg/L 10 98 90 110 <br />Sample ID: C10101020-001AMSD Sample Matrix Spike Duplicate Run: BAL-1 _101028A 10/28/10 09:04 <br />Solids, Total Dissolved TDS @ 180 C 2480 mg/L 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 5 of 23