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ENERGY �,1•. - Trust our People.Trust our Data. Billings,MT 800.735.4489•Casper,WY 888.235.0515 <br /> LABORATORIES www.energylab.com_ Gillette,WY 866.686.7115•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 Batch:125436 <br /> Lab ID: LCS-125436 Laboratory Control Sample Run:SV5973N.1_180917A 09/17/18 16:49 <br /> Di-n-butyl phthalate 69.4 ug/L 10 69 61 110 <br /> 1,2-Dichlorobenzene 58.1 ug/L 10 58 43 81 <br /> 1,3-Dichlorobenzene 57.1 ug/L 10 57 41 79 <br /> 1,4-Dichlorobenzene 56.4 ug/L 10 56 42 79 <br /> 3,3"-Dichlorobenzidine 91.0 ug/L 10 45 24 119 <br /> 2,4-Dichlorophenol 57.2 ug/L 10 57 49 90 <br /> Dimethyl phthalate 65.9 ug/L 10 66 58 104 <br /> Di-n-octyl phthalate 62.2 ug/L 10 62 56 110 <br /> Dibenzo(a,h)anthracene 68.2 ug/L 10 68 61 111 <br /> 2,4-Dimethylphenol 54.5 ug/L 10 54 45 89 <br /> 4,6-Dinitro-2-methylphenol 42.4 ug/L 50 42 37 105 <br /> 2,4-Dinitrophenol 31.5 ug/L 50 32 27 81 <br /> 2,4-Dinitrotoluene 69.4 ug/L 10 69 63 110 <br /> 2,6-Dinitrotoluene 69.6 ug/L 10 70 60 107 <br /> bis(2-ethylhexyl)Phthalate 66.5 ug/L 10 67 56 108 <br /> Fluoranthene 70.2 ug/L 10 70 63 110 <br /> Fluorene 69.1 ug/L 10 69 60 99 <br /> Hexachlorobenzene 67.0 ug/L 10 67 57 103 <br /> Hexachlorobutadiene 54.7 ug/L 10 55 39 83 <br /> Hexachlorocyclopentadiene 54.4 ug/L 10 54 39 91 <br /> Hexachloroethane 54.0 ug/L 10 54 37 75 <br /> Indeno(1,2,3-cd)pyrene 66.0 ug/L 10 66 59 109 <br /> Isophorone 60.1 ug/L 10 60 42 102 <br /> n-Nitrosodimethylamine 29.1 ug/L 10 29 20 45 <br /> n-Nitroso-di-n-propylamine 68.9 ug/L 10 69 49 98 <br /> n-Nitrosodiphenylamine 71.3 ug/L 10 71 61 108 <br /> 2-Nitrophenol 54.9 ug/L 10 55 51 96 <br /> 4-Nitro-phenol 20.0 ug/L 50 20 15 36 • <br /> Naphthalene 56.5 ug/L 10 57 48 96 <br /> Nitrobenzene 56.8 ug/L 10 57 51 91 <br /> Pentachlorophenol 65.8 ug/L 50 66 53 109 <br /> Phenanthrene 70.2 ug/L 10 70 58 104 <br /> Phenol 33.4 ug/L 10 33 27 45 <br /> Pyrene 74.4 ug/L 10 74 64 108 <br /> 1,2,4-Trichlorobenzene 58.2 ug/L 10 58 36 78 <br /> 2,4,6-Trichlorophenol 60.3 ug/L 10 60 47 99 <br /> Surr:2-Fluorobiphenyl 10 58 14 128 <br /> Surr:2-Fluorophenol 10 36 21 86 <br /> Surr:Nitrobenzene-d5 10 62 27 126 <br /> Surr:Phenol-d5 10 33 16 68 <br /> Surr:Terphenyl-d14 10 72 24 148 <br /> Surr:2,4,6-Tribromophenol 10 61 43 122 <br /> Qualifiers: <br /> RL-Analyte reporting limit. ND-Not detected at the reporting limit. <br /> Page 7 of 14 <br />