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www.erw6ab.com Helana, MT 877- 472 -0711 • Billings, MT 800 -735 -4489 • Casper, WY 888- 235 -0515 <br />. AasW"freabace shrea t93Y Gillette, WY 866 -686 -7175 • Rapid City, SD 888- 672 -1225 a 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 />05/01/13 <br />Project: Schwartz SW 4/03/13 S26860 <br />Work Order: <br />C13040198 <br />Analyte Count <br />Result Units <br />RL <br />%REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: A2540 C <br />Batch: TDS130408A <br />Sample ID: MB- 1_130408A <br />Method Blank <br />Run: BAL- 19_130408B <br />04/08/13 15:33 <br />Solids, Total Dissolved TDS @ 180 C <br />ND mg /L <br />10 <br />Sample ID: LCS- 2_130408A <br />Laboratory Control Sample <br />Run: BAL- 19_130408B <br />04/08/13 15:33 <br />Solids, Total Dissolved TDS @ 180 C <br />2000 mg /L <br />20 <br />100 90 110 <br />Sample ID: 013040191 -001A MS <br />Sample Matrix Spike <br />Run: BAL- 19_130408B <br />04/08/13 15.42 <br />Solids, Total Dissolved TDS @ 180 C <br />1300 mg /L <br />11 <br />99 90 110 <br />Sample ID: C13040244 -001A DUP <br />Sample Duplicate <br />Run: BAL- 19_130408B <br />04/08/13 15:45 <br />Solids, Total Dissolved TDS @ 180 C <br />11800 mg /L <br />100 <br />0.2 <br />5 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 6 of 25 <br />