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r Trustour People. Trust our Data. Billings, MT 800.735.4489 • Casper. WY 888.235.0515 <br />G 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: <br />Cotter Corporation <br />Report Date: <br />05/07/15 <br />Project: <br />Schwartz - GW 4/14/15 S27854, S27857 <br />Work Order: <br />C15040486 <br />Analyte <br />Count Result Units <br />RL %REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: <br />E200.8 <br />Analytical Run: ICPMS2-C_150423A <br />Lab ID: <br />ICV <br />Initial Calibration Verification Standard <br />04/23/15 14:46 <br />Silver <br />MB -44432 <br />0.0219 mg/L 0.0010 109 90 <br />110 <br />Lab ID: <br />ICV <br />Initial Calibration Verification Standard <br />04/23/15 16:19 <br />Silver <br />0.0218 mg/L 0.0010 109 90 <br />110 <br />Lab ID: <br />ICV <br />Initial Calibration Verification Standard <br />04/23/15 21:09 <br />Silver <br />0.0221 mg/L 0.0010 110 90 <br />110 <br />Method: <br />E200.8 <br />Batch: 44432 <br />Lab ID: <br />MB -44432 <br />6 Method Blank <br />Run: ICPMS2-C 150423A <br />04/23/15 17:31 <br />Antimony <br />ND mg/L <br />0.0002 <br />Arsenic <br />0.0005 mg/L <br />0.0003 <br />Copper <br />ND mg/L <br />0.0004 <br />Lead <br />4E-05 mg/L <br />3E-05 <br />Silver <br />0.0002 mg/L <br />2E-05 <br />Thallium <br />0.0001 mg/L <br />0.0001 <br />Lab ID: <br />LCS3-44432 <br />6 Laboratory Control Sample <br />Run: ICPMS2-C_150423A <br />04/23/15 17:34 <br />Antimony <br />0.469 mg/L <br />0.0010 <br />94 <br />85 115 <br />Arsenic <br />0.473 mg/L <br />0.0010 <br />95 <br />85 115 <br />Copper <br />0.468 mg/L <br />0.0050 <br />94 <br />85 115 <br />Lead <br />0.481 mg/L <br />0.0010 <br />96 <br />85 115 <br />Silver <br />0.0512 mg/L <br />0.0010 <br />102 <br />85 115 <br />Thallium <br />0.479 mg/L <br />0.00050 <br />96 <br />85 115 <br />Lab ID: <br />C15040495-005BMS3 <br />6 Sample Matrix Spike <br />Run: ICPMS2-C_150423A <br />04/23/15 17:58 <br />Antimony <br />0.480 mg/L <br />0.0010 <br />96 <br />70 130 <br />Arsenic <br />0.477 mg/L <br />0.0010 <br />94 <br />70 130 <br />Copper <br />0.462 mg/L <br />0.0050 <br />92 <br />70 130 <br />Lead <br />0.479 mg/L <br />0.0010 <br />96 <br />70 130 <br />Silver <br />0.0508 mg/L <br />0.0010 <br />102 <br />70 130 <br />Thallium <br />0.469 mg/L <br />0.00050 <br />94 <br />70 130 <br />Lab ID: <br />015040495-005BMSD <br />6 Sample Matrix Spike Duplicate <br />Run: ICPMS2-C_150423A <br />04/23/15 18:01 <br />Antimony <br />0.483 mg/L <br />0.0010 <br />97 <br />70 130 <br />0.7 <br />20 <br />Arsenic <br />0.480 mg/L <br />0.0010 <br />95 <br />70 130 <br />0.6 <br />20 <br />Copper <br />0.474 mg/L <br />0.0050 <br />95 <br />70 130 <br />2.6 <br />20 <br />Lead <br />0.486 mg/L <br />0.0010 <br />97 <br />70 130 <br />1.4 <br />20 <br />Silver <br />0.0522 mg/L <br />0.0010 <br />104 <br />70 130 <br />2.7 <br />20 <br />Thallium <br />0.476 mg/L <br />0.00050 <br />95 <br />70 130 <br />1.6 <br />20 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />Page 16 of 30 <br />