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.- <br /> ENERGY f- Trust our People.Trust our Data. I Billings,MT 800.735.4489•Casper WY 888.235.0515 <br /> College Station,TX 888.690.2218•Gillette,WY 866.686.1175•Helena,MT 877.412.0111 <br /> QA/QC Summary Report <br /> Prepared by Casper, WY Branch <br /> Client: Cotter Corporation Report Date: 02/26/16 <br /> Project: Schwartz- SW 02/05/16 S28653-S28656 Work Order: C16020243 <br /> Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> Method: E200.8 Analytical Run. ICPMS4-C_160210A <br /> Lab ID: ICV 4 Initial Calibration Verification Standard 02/10/16 21.07 <br /> Antimony 0.0465 mg/L 0.0010 93 90 110 <br /> Copper 0.0500 mg/L 0.0010 100 90 110 <br /> Silver 0.0212 mg/L 0.0010 106 90 110 <br /> Thallium 0.0452 mg/L 0.0010 90 90 110 <br /> Method: E200.8 Batch: R208956 <br /> Lab ID: LRB 4 Method Blank Run. ICPMS4-C_160210A 02/10/16 17:42 <br /> Antimony 0.0003 mg/L 2E-05 <br /> Copper ND mg/L 2E-05 <br /> Silver 0.0001 mg/L 4E-05 <br /> Thallium 1E-05 mg/L 1E-05 <br /> Lab ID: LFB 4 Laboratory Fortified Blank Run• ICPMS4-C_160210A 02/10/16 17.47 <br /> Antimony 0.0517 mg/L 0.0010 103 85 115 <br /> Copper 0.0519 mg/L 0 0010 104 85 115 <br /> Silver 0.0209 mg/L 0.0010 104 85 115 <br /> Thallium 0.0458 mg/L 0.0010 91 85 115 <br /> Lab ID: 016020002-003BMS4 4 Sample Matrix Spike Run' ICPMS4 C_160210A 02/11/16 03:25 <br /> Antimony 0.0550 mg/L 0.0010 110 70 130 <br /> Copper 0.0495 mg/L 0.0050 97 70 130 <br /> Silver 0 0151 mg/L 0.0010 76 70 130 <br /> Thallium 0.0500 mg/L 0.00050 100 70 130 <br /> Lab ID: 016020002-003BMSD 4 Sample Matrix Spike Duplicate Run: ICPMS4-C_160210A 02/11/16 03:30 <br /> Antimony 0.0559 mg/L 0.0010 112 70 130 16 20 <br /> Copper 0 0515 mg/L 0.0050 101 70 130 4.0 20 <br /> Silver 0.0182 mg/L 0.0010 91 70 130 18 20 <br /> Thallium 0.0509 mg/L 0.00050 102 70 130 1.9 20 <br /> Qualifiers: <br /> RL-Analyte reporting limit. ND-Not detected at the reporting limit. <br /> MDC-Minimum detectable concentration <br /> Page 8 of 20 <br />