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• <br /> ENERGY CO Trust our People.Trust our Data. Billings,MT 800.735.4489•Casper.WY 888.235.0515 <br /> LABORATORIES Gillette.WY 866.686.7175•Helena,MT 877.472.0711 <br /> QA/QC Summary Report <br /> Prepared by Billings, MT Branch <br /> Client: Colorado Analytical Laboratories Inc Report Date: 09/21/18 <br /> Project: 180911125 Mill Iron 2354-01 Work Order: C18090398 <br /> Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> I <br /> Method: E625.1 Analytical Run: R307547 <br /> Lab ID: 17-Sep-18_CCV_2 Continuing Calibration Verification Standard 09/17/18 15:46 <br /> Isophorone 77.9 ug/L 10 104 80 120 <br /> n-Nitrosodimethylamine 65.5 ug/L 10 87 80 120 <br /> n-Nitroso-di-n-propylamine 78.5 ug/L 10 105 80 120 <br /> n-Nitrosodiphenylamine 72.2 ug/L 10 96 80 120 <br /> 2-Nitrophenol 69.1 ug/L 10 92 80 120 <br /> 4-Nitrophenol 61.3 ug/L 50 82 80 120 <br /> Naphthalene 70.1 ug/L 10 93 80 120 <br /> Nitrobenzene 69.3 ug/L 10 92 80 120 <br /> Pentachlorophenol 78.0 ug/L 50 104 80 120 <br /> Phenanthrene 68.4 ug/L 10 91 80 120 <br /> Phenol 68.8 ug/L 10 92 80 120 <br /> Pyrene 72.4 ug/L 10 97 80 120 <br /> 1,2,4-Trichlorobenzene 68.9 ug/L 10 92 80 120 <br /> 2,4,6-Trichlorophenol 71.7 ug/L 10 96 80 120 <br /> Surr:2-Fluorobiphenyl 10 89 80 120 <br /> Surr:2-Fluorophenol 10 96 80 120 <br /> Surr:Nitrobenzene-d5 10 99 80 120 <br /> Surr:Phenol-d5 10 99 80 120 <br /> Surr:Terphenyl-d14 10 93 80 120 <br /> Surr:2,4,6-Tribromophenol 10 92 80 120 <br /> Qualifiers: <br /> RL-Analyte reporting limit. ND-Not detected at the reporting limit. <br /> Page 11 of 14 <br />