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ENERGY ty Trust our People.Trust our Data. Billings,MT 800.735.4489•Casper,WY 888.235.0515 <br /> LABORATORIES ,'lww.energylab.com Gillette,WY 866.686.1175• Helena,MT 871.472.0711 <br /> QA/QC Summary Report <br /> Prepared by Billings. MT Branch <br /> Client: Colorado Analytical Laboratories Inc Report Date: 09/24/18 <br /> Project: 180912021 Mill Iron 2354-01 Work Order: C18090457 <br /> Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qua! <br /> Method: E625.1 Batch: 125494 <br /> Lab ID: B18091351-002EMS Sample Matrix Spike Run:SV5973N2.1_180918A 09/18/18 15:31 <br /> n-Nitrosodimethylamine 34.0 ug/L 10 34 20 45 <br /> n-Nitroso-di-n-propylamine 72.4 ug/L 10 72 49 98 <br /> n-Nitrosodiphenylamine 70.4 ug/L 10 70 61 108 <br /> 2-Nitrophenol 75.1 ug/L 10 75 51 96 <br /> 4-Nitrophenol 16.0 ug/L 50 16 15 36 <br /> Naphthalene 67.5 ug/L 10 67 48 96 <br /> Nitrobenzene 86.2 ug/L 10 86 51 91 <br /> Pentachlorophenol 103 ug/L 50 103 53 109 <br /> Phenanthrene 62.4 ug/L 10 62 58 104 <br /> Phenol 31.3 ug/L 10 31 27 45 <br /> Pyrene 67.6 ug/L 10 68 64 108 <br /> 1,2,4-Trichlorobenzene 62.3 ug/L 10 62 36 78 <br /> 2,4,6-Trichlorophenol 88.8 ug/L 10 89 47 99 <br /> Surr:2-Fluorobiphenyl 10 49 14 128 <br /> Surr:2-Fluorophenol 10 49 21 86 <br /> Surr:Nitrobenzene-d5 10 73 27 126 <br /> Surr:Phenol-d5 10 45 16 68 <br /> Surr:Terphenyl-d14 10 66 24 148 <br /> Surr:2,4,6-Tribromophenol 10 67 43 122 <br /> -1=This is a known very reactive compound. The recovery of this compound was normal in the Laboratory Control Sample(LCS). The compound appears to have reacted <br /> with the sample matrix. <br /> Lab ID: 818091351-002E MSD Sample Matrix Spike Duplicate Run:SV5973N2.1_180918A 09/18/18 16:01 <br /> Acenaphthene 60.4 ug/L 10 62 58 99 5.5 40 <br /> Acenaphthylene 59.7 ug/L 10 61 57 96 0.2 40 <br /> Anthracene 59.7 ug/L 10 61 60 107 14 40 <br /> Azobenzene 56.9 ug/L 10 58 56 100 11 40 <br /> Benzidine ND ug/L 10 0 10 100 40 1S <br /> Benzo(a)anthracene • 60.8 ug/L • 10 62 62 - 114 7.6 • 40 <br /> Benzo(a)pyrene 52.5 ug/L 10 54 62 108 17 40 S <br /> Benzo(b)fluoranthene 52.8 ug/L 10 54 48 127 16 40 <br /> Benzo(g,h,i)perylene 54.6 ug/L 10 56 62 121 19 40 S <br /> Benzo(k)fluoranthene 49.3 ug/L 10 50 55 111 17 40 S <br /> 4-Bromophenyl phenyl ether 57.7 ug/L 10 59 58 105 15 40 <br /> Butylbenzylphthalate 59.1 ug/L 10 60 60 113 14 40 <br /> 4-Chloro-3-methylphenol ND ug/L 10 0 53 92 40 1S <br /> bis(-2-chloroethoxy)Methane 73.2 ug/L 10 75 50 92 1.3 40 <br /> bis(-2-chloroethyl)Ether 54.5 ug/L 10 56 44 82 1.0 40 <br /> bis(2-chloroisopropyl)Ether 59.1 ug/L 10 60 39 139 1.6 40 <br /> 2-Chloronaphthalene 56.0 ug/L 10 57 56 95 6.6 40 <br /> 2-Chlorophenol 67.3 ug/L 10 69 47 76 3.5 40 <br /> 4-Chlorophenyl phenyl ether 51.0 ug/L 10 52 58 99 5.4 40 S <br /> Chrysene 51.2 ug/L 10 52 63 106 20 40 S <br /> Diethyl phthalate 65.1 ug/L 10 66 58 103 0.4 40 <br /> Di-n-butyl phthalate 52.7 ug/L 10 54 61 110 15 40 S <br /> Qualifiers: <br /> RL-Analyte reporting limit. ND-Not detected at the reporting limit. <br /> S-Spike recovery outside of advisory limits. <br /> Page 10 of 15 <br />