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4 Trust our People. Trust our Data. Billings, MT 800.735.4489 • Casper, WY 888.235.0515 <br />College Station, TX 888.690.2218 • Gillette, WY 866.686.7175 • Helena. MT 877.472.0711 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: <br />Cotter Corporation <br />Report Date: <br />04/23/15 <br />Project: <br />Schwartz -SW 4/02/15 S27828 <br />Work Order: <br />C15040126 <br />Analyte <br />Count <br />Result Units <br />RL %REC <br />Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: <br />A4500 -F C <br />Analytical Run: MANTECH_150409A <br />Lab ID: <br />CCV-8197 <br />Continuing Calibration Verification Standard <br />04/09/15 14:12 <br />Fluoride <br />2.08 mg/L <br />0.10 <br />104 <br />90 110 <br />Method: <br />A4500 -F C <br />Batch: R198055 <br />Lab ID: <br />MBLK <br />Method Blank <br />Run: MANTECH 150409A <br />04/09/15 14:06 <br />Fluoride <br />ND mg/L <br />0.01 <br />Lab ID: <br />LCS-8319 <br />Laboratory Control Sample <br />Run: MANTECH_150409A <br />04/09/15 14:09 <br />Fluoride <br />2.08 mg/L <br />0.10 <br />104 <br />90 110 <br />Lab ID: <br />C15040126-001AMS <br />Sample Matrix Spike <br />Run: MANTECH_150409A <br />04/09/15 14:17 <br />Fluoride <br />2.29 mg/L <br />0.10 <br />98 <br />80 120 <br />Lab ID: <br />C15040126-001AMSD <br />Sample Matrix Spike Duplicate <br />Run: MANTECH_150409A <br />04/09/15 14:20 <br />Fluoride <br />2.33 mg/L <br />0.10 <br />100 <br />80 120 1.7 <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 23 <br />