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www.a&debPrn 77,472-0711 • Billings, MT 860-735-4419' • <br />7175.+ Rapid Cty; SD 888-672-1225-o Cdiege <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />WY 888-235-8515 <br />TX 888410-2218 <br />Client: Cotter Corporation Report Date: 12/17/10 <br />Project: Schwartzwalder Water Monitoring Program-Discharge Work Order: 010110468 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: A2540 C Batch: 101112 2 SLDS-TDS-W <br />Sample ID: MBLK1_101112 Method Blank Run: BAL-1 _101112C 11/12/10 15:00 <br />Solids, Total Dissolved TDS @ 180 C ND mg/L 10 <br />Sample ID: LCS1_101112 Laboratory Control Sample Run: BAL-1 _101112C 11/12/10 15:00 <br />Solids, Total Dissolved TDS @ 180 C 983 mg/L 10 98 90 110 <br />Sample ID: C10110468-001AMS Sample Matrix Spike Run: BAL-1 _101112C 11/12/10 15:02 <br />Solids, Total Dissolved TDS @ 180 C 2720 mg/L 10 104 90 110 <br />Sample ID: 010110468-001AMSD Sample Matrix Spike Duplicate Run: BAL-1 _101112C 11/12/10 15:02 <br />Solids, Total Dissolved TDS @ 180 C 2690 mg/L 10 103 90 110 1.0 10 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 5 of 23