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www.ererzdab.com f Helena, MT 877- 472 -0711 • Billings, FAT 600 - 735 -4469 • Casper, WY 888- 235 -0515 <br />"c' �' ltal Gillette, AMY 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 />Client: Cotter Corporation <br />Project: Schwartz GW 05/18/13 S26985 & S26986 <br />Analyte <br />Count Result Units <br />Method: A2320 B <br />Sample ID: MBLK <br />2 Method Blank <br />Alkalinity, Total as CaCO3 <br />ND mg /L <br />Bicarbonate as HCO3 <br />ND mg /L <br />Sample ID: LCS_130315 <br />Laboratory Control Sample <br />Alkalinity, Total as CaCO3 <br />252 mg /L <br />Sample ID: C13050711- 001ADUP <br />2 Sample Duplicate <br />Alkalinity, Total as CaCO3 <br />219 mg /L <br />Bicarbonate as HCO3 <br />267 mg /L <br />Sample ID: C13050711- 002AMS <br />Sample Matrix Spike <br />Alkalinity, Total as CaCO3 <br />457 mg /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 06/11/13 <br />Work Order: C13050721 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: R173794 <br />Run: MANTECH 130520B 05/20/13 15:23 <br />2 <br />1 <br />Run: MANTECH_130520B 05/20/13 15:37 <br />5.0 101 90 110 <br />Run: MANTECH_130520B 05/20/13 15:52 <br />50 0.3 10 <br />5.0 0.3 10 <br />Run: MANTECH_130520B 05/20/13 16:13 <br />5.0 104 80 120 <br />ND - Not detected at the reporting limit. <br />Page 7 of 24 <br />