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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: Cotter Corporation <br />Project: Schwartz - GW 4/14/15 S27854, S27857 <br />Analyte <br />Count Result Units <br />Method: <br />E200.8 <br />Lab ID: <br />LCS3-44432 6 Laboratory Control Sample <br />Lab ID: <br />C15040495-005BMS3 6 Sample Matrix Spike <br />Antimony <br />0.490 mg/L <br />Arsenic <br />0.499 mg/L <br />Copper <br />0.499 mg/L <br />Lead <br />0.493 mg/L <br />Silver <br />0.0442 mg/L <br />Thallium <br />0.476 mg/L <br />Lab ID: <br />C15040495-005BMSD 6 Sample Matrix Spike Duplicate <br />Antimony <br />0.499 mg/L <br />Arsenic <br />0.510 mg/L <br />Copper <br />0.512 mg/L <br />Lead <br />0.497 mg/L <br />Silver <br />0.0467 mg/L <br />Thallium <br />0.486 mg/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 05/07/15 <br />Work Order: C15040486 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: 44432 <br />Run: ICPMS2-C_150421A 04/21/15 16:28 <br />Run: ICPMS2-C 150421A 04/21/1518:08 <br />0.0010 <br />98 <br />70 130 <br />0.0015 <br />99 <br />70 130 <br />0.0050 <br />100 <br />70 130 <br />0.0010 <br />99 <br />70 130 <br />0.0010 <br />88 <br />70 130 <br />0.00053 <br />95 <br />70 130 <br />Run: ICPMS2-C_150421A <br />04/21/15 18:20 <br />0.0010 <br />100 <br />70 130 <br />1.9 <br />20 <br />0.0015 <br />101 <br />70 130 <br />2.3 <br />20 <br />0.0050 <br />103 <br />70 130 <br />2.6 <br />20 <br />0.0010 <br />99 <br />70 130 <br />0.8 <br />20 <br />0.0010 <br />93 <br />70 130 <br />5.5 <br />20 <br />0.00053 <br />97 <br />70 130 <br />2.1 <br />20 <br />ND - Not detected at the reporting limit. <br />Page 15 of 30 <br />