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www.ertralob.com Helena, MT 877- 472 -0711 - Billings, W 808 -735 -4489 - Casper, WY 888- 235 -0515 <br />As~ Eash aSinu IOU J Gillette, WY 866 -686 -7175 - Rapid City, SD 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 />07/12/13 <br />Project: Schwartz - GW 06/19/13 S27006 - S27007 <br />Work Order: <br />C13060719 <br />Analyte <br />Count Result Units <br />RL <br />%REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: A2320 B <br />Batch: R175047 <br />Sample ID: MBLK <br />2 Method Blank <br />Run: MANTECH_130620B <br />06/20/13 15:40 <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_130620B <br />06/20/13 15:55 <br />Alkalinity, Total as CaCO3 <br />255 mg /L <br />5.0 <br />102 90 110 <br />Sample ID: C13060709- 017ADUP <br />2 Sample Duplicate <br />Run: MANTECH_130620B <br />06/20/13 19 40 <br />Alkalinity, Total as CaCO3 <br />167 mg /L <br />5.0 <br />0.6 <br />10 <br />Bicarbonate as HCO3 <br />204 mg /L <br />5.0 <br />0.5 <br />10 <br />Sample ID: C13060709- 018AMS <br />Sample Matrix Spike <br />Run: MANTECH_130620B <br />06/20/13 19:56 <br />Alkalinity, Total as CaCO3 <br />410 mg /L <br />5.0 <br />101 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 7 of 23 <br />