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wwwtiwgylab.com Helena, NT 877- 472 -0711 • Billings, W 800- 735 -4489 • Casper, WY 888- 235 -0515 <br />Awly"Oeafto Um IM Gillette, WY 866 -666 -7175 • Rapid City, SD 888- 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 />08/20/13 <br />Project: Schwartz GW 7/23/13 S27081 <br />Work Order: <br />013070939 <br />[Analyte <br />Count Result Units <br />RL <br />° /.REC <br />Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: A5310 C <br />Analytical Run: TOC1- C_130725A <br />Sample ID: ICV -7265 <br />Initial Calibration Verification Standard <br />07/25/13 08:20 <br />Organic Carbon, Total (TOC) <br />10.3 mg /L <br />0.50 <br />103 <br />90 110 <br />Sample ID: CCV -7343 <br />Continuing Calibration Verification <br />Standard <br />07/25/13 08:31 <br />Organic Carbon, Total (TOC) <br />10.00 mg /L <br />0.50 <br />100 <br />90 110 <br />Method: A5310 C <br />Batch: R176369 <br />Sample ID: MBLK <br />Method Blank <br />Run: TOC1- C_130725A <br />07/25/13 08:43 <br />Organic Carbon, Total (TOC) <br />ND mg /L <br />0.03 <br />Sample ID: C13070898- 001AMS <br />Sample Matrix Spike <br />Run: TOC1- C_130725A <br />07/25/13 10:49 <br />Organic Carbon, Total (TOC) <br />10.2 mg /L <br />0.50 <br />104 <br />85 115 <br />Sample ID: C13070898- 001AMSD <br />Sample Matrix Spike Duplicate <br />Run: TOC1- C_130725A <br />07/25/13 11.00 <br />Organic Carbon, Total (TOC) <br />10.2 mg /L <br />0.50 <br />105 <br />85 115 0.2 <br />10 <br />Sample ID: LCS -7265 <br />Laboratory Control Sample <br />Run: TOC 1- C_130725A <br />07/25/13 14:57 <br />Organic Carbon, Total (TOC) <br />10.1 mg /L <br />0.50 <br />101 <br />90 110 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 4 of 12 <br />