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Trustour People. Trust our Data. Billings, MT 800.735.4489 • Casper. WY 888.135.0515 <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 Report Date: 05/07/15 <br />Project: Schwartz - GW 4/14/15 S27854, S27857 Work Order: C15040486 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: <br />E200.8 <br />Analytical Run: <br />ICPMS4-C_150422A <br />Lab ID: <br />ICV <br />Initial Calibration Verification Standard <br />04/22/15 15:51 <br />Arsenic <br />0.0508 mg/L <br />0.0010 <br />102 <br />90 <br />110 <br />Lab ID: <br />ICV <br />Initial Calibration Verification Standard <br />04/22/15 20:29 <br />Arsenic <br />0.0507 mg/L <br />0.0010 <br />101 <br />90 <br />110 <br />Lab ID: <br />ICV <br />Initial Calibration Verification Standard <br />04/23/15 01:06 <br />Arsenic <br />0.0504 mg/L <br />0.0010 <br />101 <br />90 <br />110 <br />Lab ID: <br />ICV <br />Initial Calibration Verification Standard <br />04/23/15 06:42 <br />Arsenic <br />0.0517 mg/L <br />0.0010 <br />103 <br />90 <br />110 <br />Method: <br />E200.8 <br />Batch: 44432 <br />Lab ID: <br />MB -44432 <br />6 Method Blank <br />Run: ICPMS4-C 150422A <br />04/22/15 17:09 <br />Antimony <br />0.0002 mg/L <br />0.0002 <br />Arsenic <br />ND mg/L <br />0.0004 <br />Copper <br />0.002 mg/L <br />0.0002 <br />Lead <br />4E-05 mg/L <br />4E-05 <br />Silver <br />ND mg/L <br />0.0002 <br />Thallium <br />7E-05 mg/L <br />6E-05 <br />Lab ID: <br />LCS3-44432 <br />6 Laboratory Control Sample <br />Run: ICPMS4-C_150422A <br />04/22/15 17:14 <br />Antimony <br />0.512 mg/L <br />0.0010 <br />102 <br />85 <br />115 <br />Arsenic <br />0.492 mg/L <br />0.0010 <br />98 <br />85 <br />115 <br />Copper <br />0.485 mg/L <br />0.0050 <br />96 <br />85 <br />115 <br />Lead <br />0.503 mg/L <br />0.0010 <br />101 <br />85 <br />115 <br />Silver <br />0.0485 mg/L <br />0.0010 <br />97 <br />85 <br />115 <br />Thallium <br />0.463 mg/L <br />0.00050 <br />93 <br />85 <br />115 <br />Lab ID: <br />C15040482-001CMS3 <br />6 Sample Matrix Spike <br />Run: ICPMS4-C_150422A <br />04/22/15 18:00 <br />Antimony <br />0.494 mg/L <br />0.0010 <br />99 <br />70 <br />130 <br />Arsenic <br />0.502 mg/L <br />0.0010 <br />100 <br />70 <br />130 <br />Copper <br />0.582 mg/L <br />0.0050 <br />94 <br />70 <br />130 <br />Lead <br />0.484 mg/L <br />0.0010 <br />97 <br />70 <br />130 <br />Silver <br />0.0383 mg/L <br />0.0010 <br />77 <br />70 <br />130 <br />Thallium <br />0.429 mg/L <br />0.00050 <br />86 <br />70 <br />130 <br />Lab ID: <br />C15040482-001CMSD <br />6 Sample Matrix Spike Duplicate <br />Run: ICPMS4-C_150422A <br />04/22/15 18:05 <br />Antimony <br />0.491 mg/L <br />0.0010 <br />98 <br />70 <br />130 0.7 <br />20 <br />Arsenic <br />0.490 mg/L <br />0.0010 <br />98 <br />70 <br />130 2.5 <br />20 <br />Copper <br />0.578 mg/L <br />0.0050 <br />93 <br />70 <br />130 0.7 <br />20 <br />Lead <br />0.488 mg/L <br />0.0010 <br />98 <br />70 <br />130 0.8 <br />20 <br />Silver <br />0.0399 mg/L <br />0.0010 <br />80 <br />70 <br />130 4.2 <br />20 <br />Thallium <br />0.439 mg/L <br />0.00050 <br />88 <br />70 <br />130 2.2 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />ND - <br />Not detected <br />at the reporting limit. <br />MDC - Minimum detectable concentration <br />Page 19 of 30 <br />