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ENERGY O 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 /> Method: E625.1 <br /> Batch: 125436 <br /> Lab ID: MB-125436 Method Blank Run:SV5973N.1_180917A 09/17/18 16:17 <br /> Isophorone ND ug/L 10 <br /> n-Nitrosodimethylamine ND ug/L 10 <br /> n-Nitroso-di-n-propylamine ND ug/L 10 <br /> n-Nitrosodiphenylamine ND ug/L 10 <br /> 2-Nitrophenol ND ug/L 10 <br /> 4-Nitrophenol ND ug/L 50 <br /> Naphthalene ND ug/L 10 <br /> Nitrobenzene ND ug/L 10 <br /> Pentachlorophenol ND ug/L 50 <br /> Phenanthrene ND ug/L 10 <br /> Phenol ND ug/L 10 <br /> Pyrene ND ug/L 10 <br /> 1,2,4-Trichlorobenzene ND ug/L 10 <br /> 2,4,6-Trichlorophenol ND ug/L 10 <br /> Surr:2-Fluorobiphenyl 10 55 14 128 <br /> Surr:2-Fluorophenol 10 37 21 86 <br /> Surr:Nitrobenzene-d5 10 61 27 126 <br /> Surr:Phenol-d5 10 31 16 68 <br /> Surr:Terphenyl-d14 10 76 24 148 <br /> Surr:2,4,6-Tribromophenol 10 62 43 122 <br /> Lab ID: LCS-125436 Laboratory Control Sample Run:SV5973N.1_180917A 09/17/18 16:49 <br /> Acenaphthene 68.4 ug/L ' 10 68 58 99 <br /> Acenaphthylene 64.1 ug/L 10 64 57 96 <br /> Anthracene 69.6 ug/L 10 70 60 107 <br /> Azobenzene 66.8 ug/L 10 67 56 100 <br /> Benzidine 121 ug/L 10 61 10 100 <br /> Benzo(a)anthracene 70.2 ug/L . 10 70 .62 114 _ <br /> Benzo(a)pyrene 66.4 ug/L 10 66 62 108 <br /> Benzo(b)fluoranthene 64.3 ug/L 10 64 48 127 <br /> Benzo(g,h,i)perylene 66.9 ug/L 10 67 62 121 <br /> Benzo(k)fluoranthene 62.0 ug/L 10 62 55 111 <br /> 4-Bromophenyl phenyl ether 72.9 ug/L 10 73 58 105 <br /> Butylbenzylphthalate 68.7 ug/L 10 69 60 113 <br /> 4-Chloro-3-methylphenol 59.7 ug/L 10 60 53 92 <br /> bis(-2-chloroethoxy)Methane 52.4 ug/L 10 52 50 92 <br /> bis(-2-chloroethyl)Ether 58.2 ug/L 10 58 44 82 <br /> bis(2-chloroisopropyl)Ether 52.6 ug/L 10 53 39 139 <br /> 2-Chloronaphthalene 63.6 ug/L 10 64 56 95 <br /> 2-Chlorophenol 52.6 ug/L 10 53 47 76 <br /> 4-Chlorophenyl phenyl ether 69.6 ug/L 10 70 58 99 <br /> Chrysene 73.8 ug/L 10 74 63 106 <br /> Diethyl phthalate 70.8 ug/L 10 71 58 103 <br /> Qualifiers: <br /> RL-Analyte reporting limit. ND-Not detected at the reporting limit. <br /> Page 6 of 14 <br />