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www.ertr&b.com Helena, MT 877 -472 -6711 a Billings, MT 800- 735 -4489 a Casper, WY 888 - 235 -0515 <br />Jody WEwakw Sm IM Gillette, WY 866 -886 -7175 a Rapid City, SO 888 -672 -1225 a 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 />08/08/13 <br />Project: Schwartz -GW 7/10/13 S27017 <br />Work Order: <br />C13070431 <br />Analyte <br />Count Result Units <br />RL <br />0/J9EC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: A2320 B <br />Batch: R175766 <br />Sample ID: MBLK <br />2 Method Blank <br />Run: MANTECH_130711 B <br />07/11/13 16:01 <br />Alkalinity, Total as CaCO3 <br />ND mg /L <br />2 <br />Bicarbonate as HCO3 <br />ND mg /L <br />1 <br />Sample ID: LCS_130618 <br />Laboratory Control Sample <br />Run: MANTECH_130711 B <br />07/11/13 16:16 <br />Alkalinity, Total as CaCO3 <br />255 mg /L <br />5.0 <br />102 90 110 <br />Sample ID: C13070419- 011BDUP <br />2 Sample Duplicate <br />Run: MANTECH_130711B <br />07/11/13 23:22 <br />Alkalinity, Total as CaCO3 <br />251 mg /L <br />5.0 <br />0.2 <br />10 <br />Bicarbonate as HCO3 <br />306 mg /L <br />5.0 <br />0.2 <br />10 <br />Sample ID: 013070419- 012BMS <br />Sample Matrix Spike <br />Run: MANTECH_130711 B <br />07/11/13 23:39 <br />Alkalinity, Total as CaCO3 <br />512 mg /L <br />50 <br />105 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 5 of 20 <br />