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www.mwgylsb.com Helena, mT 871 472 -0711 • Billings, W 800- 735 -4409 • Casper, WY 888- 235 -8515 <br />M~ rwh"Sk'rN2 Gillette, WY 866 -686 -7175 • Rapid City, SO 886- 672 -1225 • College Station, TX 888 -690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Report Date: <br />08/26/13 <br />Project: Schwartz GW 08/08/13 S27024 & S27025 <br />Work Order: <br />013080364 <br />Analyte Count <br />Result Units <br />RL <br />° /.REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: A2540 C <br />Batch: TDS 130812A <br />Sample ID: MB- 1_130812A <br />Method Blank <br />Run: BAL- 19_130812A <br />08/12/13 15:14 <br />Solids, Total Dissolved TDS @ 180 C <br />ND mg /L <br />10 <br />Sample ID: LCS- 2_130812A <br />Laboratory Control Sample <br />Run: BAL- 19_130812A <br />08/12/13 15:15 <br />Solids, Total Dissolved TDS @ 180 C <br />2070 mg /L <br />20 <br />103 90 110 <br />Sample ID: C13080342 -030A DUP <br />Sample Duplicate <br />Run: BAL- 19_130812A <br />08/12/13 15:24 <br />Solids, Total Dissolved TDS @ 180 C <br />40.0 mg /L <br />10 <br />2.5 <br />5 <br />Sample ID: 013080342 -031A MS <br />Sample Matrix Spike <br />Run. BAL- 19_130812A <br />08/12/13 15:24 <br />Solids, Total Dissolved TDS @ 180 C <br />17500 mg /L <br />100 <br />103 90 110 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 8 of 23 <br />