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- www.erwdah.com ( Helena, MIT 877-472 -0711 9 Billings, MT 800 - 735-4489 • Casper, WY 888 - 235 -0515 <br />A"'W''t V=IM )I Gillette, WY 866406 -7175 • Rapid City, SD 886 -672 -1225 • College Station, A 888- 690 -2218 <br />: QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz 5/16/13 S26976- S26978 & S26980- S26983 <br />Analyte Count Result Units <br />Method: A2540 C <br />Sample ID: MB- 1_130522A <br />Method Blank <br />Solids, Total Dissolved TDS @ 180 C <br />ND mg /L <br />Sample ID: LCS- 2_130522A <br />Laboratory Control Sample <br />Solids, Total Dissolved TDS @ 180 C <br />1950 mg /L <br />Sample ID: C13050678 -006A DUP <br />Sample Duplicate <br />Solids, Total Dissolved TDS @ 180 C <br />196 mg /L <br />Sample ID: 013050678 -008A MS <br />Sample Matrix Spike <br />Solids, Total Dissolved TDS @ 180 C <br />11400 mg /L <br />Qualifiers: <br />RL - Analyte reporting limit <br />MDC - Minimum detectable concentration <br />Report Date: 06/12/13 <br />Work Order: 013050679 <br />RL %R EC Low Limit High Limit RPD RPDLimit Qual <br />Batch: TDS130522A <br />Run: BAL- 19_130522A 05/22/13 16:07 <br />10 <br />Run: BAL- 19_130522A <br />20 97 90 110 <br />Run: BAL- 19_130522A <br />10 <br />Run: BAL- 19_130522A <br />100 98 90 110 <br />ND - Not detected at the reporting limit. <br />1.5 <br />05/22/13 16:07 <br />05/22/13 16:10 <br />5 <br />05/22/13 16:11 <br />Page 12 of 37 <br />