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wwwoewab.com Helena, W 877472 -0711 • Billings, MT 800 -735 -4489 • Casper, WY 888- 235 -1515 <br />'rte f 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 />..:..•. O L... .ate n_%n/ nllf)/MO 01)74C I) <br />Analyte Count Result Units <br />Method: A2540 C <br />Sample ID: MB- 1_130924A <br />Method Blank <br />Solids, Total Dissolved TDS @ 180 C <br />ND mg /L <br />Sample ID: LCS- 2_130924A <br />Laboratory Control Sample <br />Solids, Total Dissolved TDS @ 180 C <br />2060 mg /L <br />Sample ID: C13090808 -013A MS <br />Sample Matrix Spike <br />Solids, Total Dissolved TDS @ 180 C <br />4410 mg /L <br />Sample ID: C13090862 -003A DUP <br />Sample Duplicate <br />Solids, Total Dissolved TDS @ 180 C <br />2390 mg /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 10/14/13 <br />Work Order: C13090821 <br />RL ° /diEC Low Limit High Limit RPD RPDLimit Qual <br />Batch: TDS130924A <br />Run: BAL- 19_130924B 09/24/13 15:28 <br />10 <br />Run: BAL- 19_130924B <br />20 103 90 110 <br />Run: BAL- 19_130924B <br />20 102 90 110 <br />Run: BAL- 19_130924B <br />20 <br />ND - Not detected at the reporting limit. <br />09/24/13 15:28 <br />09/24/13 15:35 <br />09/24/13 15:38 <br />1.0 5 <br />Page 6 of 21 <br />