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www.enerdab.com Helena, YT 877472 -0711 • Billings, MY 800- 7354489 • Casper, WY 888- 235 -0515 <br />} i aastac' f Gillette, WY 866 -666 -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 />Project: Schwartz SW 5/21/13 S26991 - S26995 <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 />258 mg /L <br />Sample ID: C13050868- 004BDUP <br />2 Sample Duplicate <br />Alkalinity, Total as CaCO3 <br />95.1 mg /L <br />Bicarbonate as HCO3 <br />116 mg /L <br />Sample ID: C13050869- 001AMS <br />Sample Matrix Spike <br />Alkalinity, Total as CaCO3 <br />479 mg /L <br />Qualifiers: <br />RL - Analyte reporting limit <br />MDC - Minimum detectable concentration <br />Report Date: 06/27/13 <br />Work Order: C13050860 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: R173962 <br />Run: MANTECH 130523B 05/23/13 17:26 <br />2 <br />1 <br />Run: MANTECH 130523B 05/23/13 17:41 <br />5.0 103 90 110 <br />Run: MANTECH 130523B 05/23/13 21:30 <br />5.0 0.1 10 <br />5.0 0.1 10 <br />Run: MANTECH 130523B 05/23/13 21:50 <br />5.0 102 80 120 <br />ND - Not detected at the reporting limit. <br />Page 9 of 31 <br />