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• a www.enerdab.com Helena, MT 877- 472 -0711 • Billings, W 800- 735 -4489 • Casper, WY 888 -235 -8515 <br />A� p AWWW &=*=M= IJW Gillette, WY 866 -886 -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 />05/06/13 <br />Project: Schwartz GW 4/11/13 S26889 <br />Work Order: <br />C13040486 <br />Analyte Count Result Units <br />RL <br />%REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: A2540 C <br />Batch: TDS130416A <br />Sample ID: MB- 1_130416A <br />Method Blank <br />Run: BAL- 19_130416A <br />04/16/13 11:49 <br />Solids, Total Dissolved TDS @ 180 C <br />ND mg /L <br />10 <br />Sample ID: LCS- 2_130416A <br />Laboratory Control Sample <br />Run: BAL- 19_130416A <br />04/16/13 11:50 <br />Solids, Total Dissolved TDS @ 180 C <br />1970 mg /L <br />20 <br />99 90 110 <br />Sample ID: C13040398 -001A DUP <br />Sample Duplicate <br />Run: BAL- 19_130416A <br />04/16/13 11.50 <br />Solids, Total Dissolved TDS @ 180 C <br />452 mg /L <br />10 <br />5 <br />Sample ID: C13040486 -001A MS <br />Sample Matrix Spike <br />Run: BAL- 19_130416A <br />04/16/13 12:03 <br />Solids, Total Dissolved TDS @ 180 C <br />1800 mg /L <br />11 <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 6 of 21 <br />