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www.ertrgylab.com r— Helena, MT 877- 472 -0711 - Billings, MT 600- 735 -4489 - Casper, WY 888- 235 -1515 <br />Aaay&alE raffiwaSlaa IJU ) Gillette, WY 866 -686 -7175 - Rapid City, SO 886- 672 -1225 - 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 />12/10/13 <br />Schwartz SW 11/6/13 S27253 S27255 S27256 <br />Work Order: <br />01 31 1 0305 <br />(Project: <br />Analyte <br />Count Result Units <br />RL %REC Low Limit High Limit RPD <br />l <br />RPDLimit Qual <br />Method: A2320 B <br />Batch: R180560 <br />Sample ID: MBLK <br />2 Method Blank <br />Run: MANTECH_131108A <br />11/08/13 14:44 <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_130917 <br />Alkalinity, Total as CaCO3 <br />Sample ID: C13110305- 001BDUP <br />Alkalinity, Total as CaCO3 <br />Bicarbonate as HCO3 <br />Sample ID: C13110305 -001 BMS <br />Alkalinity, Total as CaCO3 <br />Laboratory Control Sample <br />261 mg /L <br />2 Sample Duplicate <br />76.1 mg /L <br />92.9 mg /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Sample Matrix Spike <br />333 mg /L <br />Run: MANTECH_131108A 11/08/13 14:58 <br />5.0 104 90 110 <br />Run: MANTECH_131108A 11/08/13 15:13 <br />5.0 0.4 10 <br />5.0 0.4 10 <br />Run: MANTECH_131108A 11/08/13 15:21 <br />5.0 102 80 120 <br />ND - Not detected at the reporting limit. <br />Page 7 of 30 <br />