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www.erkrgylab.com Helena, W 877472 -0711 • Billings, MT 800- 735 -4489 • Casper, WY 888- 235 -0515 <br />Gillette, WY 866- 686 -7175 • Rapid City, SD 888 -672 -1225 • College Station, <br />TX 888- 690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: <br />Cotter Corporation <br />Report Date: <br />09/26/14 <br />Project: <br />Schwartz -SW 9/3/14 S27625 and S27660 Work Order: <br />C14090147 <br />Analyte <br />Count Result Units RL %REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: <br />E245.1 <br />Analytical Run: CVAA_C203_140911 A <br />Lab ID: <br />ICV <br />Initial Calibration Verification Standard <br />09/11/14 14:43 <br />Mercury <br />0.00550 mg /L 0.00010 110 90 110 <br />Method: <br />E245.1 <br />Batch: 140911 A <br />Lab ID: <br />IPC <br />Instrument Performance Check Sample Run: CVAA_C203_140911A <br />09/11/14 14:48 <br />Mercury <br />0.00476 mg /L 0.00010 95 95 105 <br />Method: <br />E245.1 <br />Batch: 42576 <br />Lab ID: <br />MB -42576 <br />Method Blank Run: CVAA C203 140911A <br />09/11/14 14:50 <br />Mercury <br />ND mg /L 2E -05 <br />Lab ID: <br />LCS -42576 <br />Laboratory Control Sample Run: CVAA_C203_140911A <br />09/11/14 14:52 <br />Mercury <br />0.00495 mg /L 0.00010 99 85 115 <br />Lab ID: <br />C14090147- 001DMS <br />Sample Matrix Spike Run: CVAA_C203_140911A <br />09/11/14 14:57 <br />Mercury <br />0.00508 mg /L 0.00010 102 75 125 <br />Lab ID: <br />C14090147- 001DMSD <br />Sample Matrix Spike Duplicate Run: CVAA_C203_140911A <br />09/11/14 14:58 <br />Mercury <br />0.00599 mg /L 0.00010 120 75 125 17 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 18 of 29 <br />