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\ ' www.ene oab.com Helena, MT 877- 472 -0711 - Billings, MT 800- 735 -4489 - Casper, WY 888 -235 -0515 <br />Gillette, WY 866 -686 -7175 - Rapid City, SO 886 -672 -1225 - College Station, T% 888 - 690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Report Date: <br />07/08/13 <br />Project: Schwartz GW 6/6/2013 S26941 <br />Work Order: <br />C13060270 <br />FAnalyte <br />Count Result Units <br />RL <br />° /.REC Low Limit High Limit RPD <br />RPDLimit 0IJBI6 <br />Method: A2320 B <br />Batch: R174544 <br />Sample ID: MBLK <br />2 Method Blank <br />Run: MANTECH 130607B <br />06/07/13 15:25 <br />Alkalinity, Total as CaCO3 <br />ND mg /L <br />2 <br />Bicarbonate as HCO3 <br />1 mg /L <br />1 <br />Sample ID: LCS_130315 <br />Laboratory Control Sample <br />Run: MANTECH_130607B <br />06/07/13 15:40 <br />Alkalinity, Total as CaCO3 <br />256 mg /L <br />5.0 <br />103 90 110 <br />Sample ID: C13060255- 006AMS <br />Sample Matrix Spike <br />Run- MANTECH_130607B <br />06/07/13 23:01 <br />Alkalinity, Total as CaCO3 <br />551 mg /L <br />5.0 <br />100 80 120 <br />Sample ID: C13060270- 001BDUP <br />2 Sample Duplicate <br />Run- MANTECH_130607B <br />06/08/13 00:21 <br />Alkalinity, Total as CaCO3 <br />175 mg /L <br />5.0 <br />0.2 <br />10 <br />Bicarbonate as HCO3 <br />214 mg /L <br />5.0 <br />0.2 <br />10 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 5 of 21 <br />