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www."gylab.com Helena, MT 877 472 -0711 - Billings, Ali 808 - 7354489 - Casper, WY 888- 235 -0515 <br />AeerytlalFiaeaAlaraSahc+ ylliY Gillette, WY 866 -686 -7175 - Rapid City, SD 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 />06/18/13 <br />Project: Schwartz GW 5/15/2013 <br />S26920 & S26921 <br />Work Order: <br />013050697 <br />Analyte Count Result Units <br />RL <br />° /.REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: A2540 C <br />Batch: TDS130520B <br />Sample ID: MB- 1_130520B <br />Method Blank <br />Run: BAL -19 130520C <br />05/21/13 08:19 <br />Solids, Total Dissolved TDS @ 180 C <br />ND mg /L <br />10 <br />Sample ID: LCS- 2_130520B <br />Laboratory Control Sample <br />Run: BAL- 19_130520C <br />05/21/13 08:19 <br />Solids, Total Dissolved TDS @ 180 C <br />1910 mg /L <br />20 <br />95 90 110 <br />Sample ID: C13050683 -003A DUP <br />Sample Duplicate <br />Run: BAL- 19_130520C <br />05/21/13 08:21 <br />Solids, Total Dissolved TDS @ 180 C <br />1930 mg /L <br />20 <br />0.1 <br />5 <br />Sample ID: 013050683 -004A MS <br />Sample Matrix Spike <br />Run: BAL- 19_130520C <br />05/21/13 08:21 <br />Solids, Total Dissolved TDS @ 180 C <br />3880 mg /L <br />20 <br />99 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 24 <br />