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• www.emdab.com J Helena, Mf 811-472-0711 • Billings, MT 860-135-4489 • Casper, WY 888-235-0515 <br />EFER • ANOWEWINMOR a IM Gillette, WY 866-696-7175 • Rapid City, SD 688-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11/22/10 <br />Project: Schwartzwalder Water Monitoring Program SW Work Order: 010100592 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: A2540 C Batch: 101015_1_SLDS-TDS-W <br />Sample ID: MBLK1_101015 Method Blank Run: BAL-1 101015B 10/15/10 15:49 <br />Solids, Total Dissolved TDS @ 180 C ND mg/L 10 <br />Sample ID: LCS1_101015 Laboratory Control Sample Run: BAL-1 _101015B 10/15/10 15:49 <br />Solids, Total Dissolved TDS @ 180 C 1030 mg/L 10 103 90 110 <br />Sample ID: C10100606-001AMS Sample Matrix Spike Run: BAL-1_ 101015B 10/15/10 15:56 <br />Solids, Total Dissolved TDS @ 180 C 2350 mg/L 10 101 90 110 <br />Sample ID: C1 01 006 06-001AMSD Sample Matrix Spike Duplicate Run: BAL-1_ 101015B 10/15/10 15:56 <br />Solids, Total Dissolved TDS @ 180 C 2320 mg/L 10 100 90 110 1.1 10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 11 of 36