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QC Sample Results <br />Job ID: 200-63117-1Client: WSB & Associates, Inc <br />SDG: 200-63117Project/Site: Kenzie Terrace <br />Method: TO-15 - Volatile Organic Compounds in Ambient Air (Continued) <br />Client Sample ID: Lab Control SampleLab Sample ID: LCS 200-179117/3 <br />Matrix: Air Prep Type: Total/NA <br />Analysis Batch: 179117 <br />1,2-Dichloropropane 46.2 46.2 ug/m3 100 69 -128 <br />Analyte <br />LCS LCS <br />DUnitResultQualifier %Rec <br />Spike <br />Added <br />%Rec <br />Limits <br />Dichloropropene, cis 1,3-45.4 44.3 ug/m3 98 74 -125 <br />Dichloropropene, 1,3-, trans-45.4 46.8 ug/m3 103 74 -128 <br />1,2-Dichlorotetrafluoroethane 69.9 70.6 ug/m3 101 71 -141 <br />Ethanol 27.7 23.6 ug/m3 85 50 -150 <br />Ethyl acetate 36.0 36.8 ug/m3 102 70 -131 <br />Ethylbenzene 43.4 41.4 ug/m3 95 74 -122 <br />4-Ethyltoluene 49.2 46.9 ug/m3 95 75 -129 <br />Heptane, n-41.0 40.4 ug/m3 99 60 -142 <br />Hexachlorobutadiene 107 92.7 ug/m3 87 58 -130 <br />Hexane, n-35.2 34.9 ug/m3 99 63 -138 <br />2-Hexanone 41.0 39.0 ug/m3 95 57 -143 <br />Methylene Chloride 34.7 35.7 ug/m3 103 59 -137 <br />4-Methyl-2-pentanone (MIBK)41.0 42.0 ug/m3 103 58 -144 <br />Methyl tert-butyl ether 36.0 36.2 ug/m3 101 70 -127 <br />Naphthalene 52.4 46.5 ug/m3 89 50 -150 <br />2-Propanol 24.6 23.5 ug/m3 96 53 -142 <br />Propylene 17.2 19.1 ug/m3 111 50 -158 <br />Styrene 42.6 42.4 ug/m3 100 74 -125 <br />1,1,2,2-Tetrachloroethane 68.6 64.1 ug/m3 93 74 -126 <br />Tetrachloroethene 67.8 62.6 ug/m3 92 70 -125 <br />Tetrahydrofuran 29.5 30.4 ug/m3 103 60 -149 <br />Toluene 37.7 36.2 ug/m3 96 75 -122 <br />1,2,4-Trichlorobenzene 74.2 62.7 ug/m3 84 50 -150 <br />1,1,1-Trichloroethane 54.6 53.9 ug/m3 99 72 -127 <br />1,1,2-Trichloroethane 54.6 52.2 ug/m3 96 75 -126 <br />Trichloroethene 53.7 51.6 ug/m3 96 73 -122 <br />Trichlorofluoromethane 56.2 54.8 ug/m3 98 70 -129 <br />1,1,2-Trichlorotrifluoroethane 76.6 78.2 ug/m3 102 70 -121 <br />1,2,4-Trimethylbenzene 49.2 47.5 ug/m3 97 71 -129 <br />1,3,5-Trimethylbenzene 49.2 48.2 ug/m3 98 72 -126 <br />Vinyl acetate 35.2 26.8 ug/m3 76 59 -149 <br />Vinyl chloride 25.6 25.6 ug/m3 100 61 -135 <br />Xylene, m&p 86.8 83.9 ug/m3 97 76 -121 <br />Xylene, o-43.4 42.1 ug/m3 97 73 -123 <br />Client Sample ID: V-1Lab Sample ID: 200-63117-1 DU <br />Matrix: Air Prep Type: Total/NA <br />Analysis Batch: 179117 <br />Acetone 140 139 ug/m3 4 25 <br />Analyte <br />DU DU <br />DUnitResultQualifier <br />Sample <br />Result <br />Sample <br />Qualifier LimitRPD <br />RPD <br />Benzene 6.4 U 6.4 U ug/m3 NC 25 <br />Benzyl chloride 10 U 10 U ug/m3 NC 25 <br />Bromodichloromethane 13 U 13 U ug/m3 NC 25 <br />Bromoform 21 U 21 U ug/m3 NC 25 <br />Bromomethane 7.8 U 7.8 U ug/m3 NC 25 <br />1,3-Butadiene 4.4 U 4.4 U ug/m3 NC 25 <br />2-Butanone 15 U 15 U ug/m3 NC 25 <br />Eurofins Burlington <br />Page 14 of 44 4/29/2022 <br />1 <br />2 <br />3 <br />4 <br />5 <br />6 <br />7 <br />8 <br />9 <br />10 <br />11 <br />12 <br />13 <br />14 <br />15 <br />16