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ERERGY ., . <br />l..NR0RATCRiE5 <br />Helena, MT 677 -472 -0711 * Billings, MT 1100 -735 -4469 * Casper, WY 888- 235 -0515 <br />Gillette, WY 866- 686 -7175 • Rapid City, SD 888 - 672 -1225 • CDIIege Station, TX 888- 690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Report Date: <br />05/01/13 <br />Project: Schwartz SW 4/03/13 S26860 <br />Work Order: <br />C13040198 <br />Analyte Count <br />Result Units <br />RL <br />%REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: A4500 -F C <br />Batch: R172220 <br />Sample ID: MBLK <br />Method Blank <br />Run: MANTECH_130408B <br />04/08/13 08:47 <br />Fluoride <br />ND mg /L <br />0.05 <br />Sample ID: LCS -7250 <br />Laboratory Control Sample <br />Run: MANTECH_130408B <br />04/08/13 08:50 <br />Fluoride <br />2.00 mg /L <br />0.10 <br />100 90 110 <br />Sample ID: C13040193- 001AMS <br />Sample Matrix Spike <br />Run: MANTECH_130408B <br />04/08/13 09:07 <br />Fluoride <br />2.20 mg /L <br />0.10 <br />94 80 120 <br />Sample ID: C13040193- 001AMSD <br />Sample Matrix Spike Duplicate <br />Run: MANTECH_130408B <br />04/08/13 09:10 <br />Fluoride <br />2.25 mg /L <br />0.10 <br />97 80 120 2.2 <br />10 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 8 of 25 <br />