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• www.erwdab.com Helena, MT 877 - 472 -0711 - Billings, MT 880 -735 -4489 - Casper, WY 888- 235 -0515 <br />- AsmtjNatExcaaw�Sfia 195? Gillette, WY 866 -686 -7175 - Rapid City, SD 880- 672 -1225 - College Station, TX 888 -690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: <br />Cotter Corporation <br />Report Date: <br />02/17/15 <br />Project: <br />Schwartz - GW 1/28/15 <br />S28066, S28069, S28071 <br />Work Order: <br />C15010751 <br />Analyte <br />Count Result Units <br />RL %REC <br />Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: <br />A4500 -F C <br />Analytical Run: MANTECH_150130B <br />Lab ID: <br />CCV -8197 <br />Continuing Calibration Verification Standard <br />01/30/15 11:37 <br />Fluoride <br />2.08 mg /L <br />0.10 <br />104 <br />90 110 <br />Method: <br />A4500 -F C <br />Batch: R195723 <br />Lab ID: <br />MBLK <br />Method Blank <br />Run: MANTECH_150130B <br />01/30/15 11:32 <br />Fluoride <br />ND mg /L <br />0.01 <br />Lab ID: <br />LCS -8319 <br />Laboratory Control Sample <br />Run: MANTECH_150130B <br />01/30/15 11:34 <br />Fluoride <br />2.00 mg /L <br />0.10 <br />100 <br />90 110 <br />Lab ID: <br />C15010741- 001AMS <br />Sample Matrix Spike <br />Run: MANTECH_150130B <br />01/30/15 11:42 <br />Fluoride <br />2.88 mg /L <br />0.10 <br />96 <br />80 120 <br />Lab ID: <br />C15010741- 001AMSD Sample Matrix Spike Duplicate <br />Run: MANTECH_150130B <br />01/30/15 11:45 <br />Fluoride <br />2.88 mg /L <br />0.10 <br />96 <br />80 120 0.0 <br />10 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 6 of 23 <br />