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ENERGY <br />LAHORAFOI IF.S <br />www.energylab.com <br />Analytical Excellence Since 1852 <br />Client: Cotter Corporation <br />Project: Schwartz GW 8/31/2012 S26629 <br />Analyte Count <br />Method: A2540 C <br />Sample ID: MB- 1_120906A <br />Solids, Total Dissolved TDS @ 180 <br />Sample ID: LCS- 2_120906A <br />Solids, Total Dissolved TDS @ 180 <br />Sample ID: C12090026-001A MS <br />Solids, Total Dissolved TDS @ 180 <br />Sample ID: C12090044 -004A DUP <br />Solids, Total Dissolved TDS @ 180 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Result Units <br />Method Blank <br />C ND mg /L <br />Laboratory Control Sample <br />C 1100 mg /L <br />Sample Matrix Spike <br />C 1410 mg /L <br />Sample Duplicate <br />C 1140 mg /L <br />Helena, MT 817 472 - 0711 • Billings, MT 800 - 735 - 4469 • Casper, WY 888 - 235 -0515 <br />Gillette, WY 866 686 - 7175 • Rapid City, SD 888 - 672 - 1225 • College Station, TX 888 - 690 - 2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />4 <br />10 <br />10 <br />10 <br />Run: BAL-1_120906A <br />Run: BAL-1_120906A <br />99 90 110 <br />Run: BAL-1_120906A <br />100 90 110 <br />Run. BAL-1_120906A <br />ND - Not detected at the reporting limit <br />Revised Date: 11/01/12 <br />Report Date: 10/05/12 <br />Work Order: C12090026 <br />Batch: TDS120906A <br />09/06/12 15:25 <br />09/06/12 15:25 <br />09/06/12 15:26 <br />09/06/12 15:38 <br />0.9 5 <br />Page 6 of 20 <br />