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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: Method BlankLab Sample ID: MB 200-179117/5 <br />Matrix: Air Prep Type: Total/NA <br />Analysis Batch: 179117 <br />RL RL <br />Toluene 0.75 U 0.75 0.75 ug/m3 04/25/22 10:54 1 <br />MB MB <br />Analyte Dil FacAnalyzedPreparedDUnitResultQualifier <br />3.7 U 3.73.7 ug/m3 04/25/22 10:54 11,2,4-Trichlorobenzene <br />1.1 U 1.11.1 ug/m3 04/25/22 10:54 11,1,1-Trichloroethane <br />1.1 U 1.11.1 ug/m3 04/25/22 10:54 11,1,2-Trichloroethane <br />1.1 U 1.11.1 ug/m3 04/25/22 10:54 1Trichloroethene <br />1.1 U 1.11.1 ug/m3 04/25/22 10:54 1Trichlorofluoromethane <br />1.5 U 1.51.5 ug/m3 04/25/22 10:54 11,1,2-Trichlorotrifluoroethane <br />0.98 U 0.980.98 ug/m3 04/25/22 10:54 11,2,4-Trimethylbenzene <br />0.98 U 0.980.98 ug/m3 04/25/22 10:54 11,3,5-Trimethylbenzene <br />18 U 1818 ug/m3 04/25/22 10:54 1Vinyl acetate <br />0.51 U 0.510.51 ug/m3 04/25/22 10:54 1Vinyl chloride <br />2.2 U 2.22.2 ug/m3 04/25/22 10:54 1Xylene, m&p <br />0.87 U 0.870.87 ug/m3 04/25/22 10:54 1Xylene, o- <br />Tentatively Identified Compound None ppb v/v 04/25/22 10:54 1 <br />MB MB <br />Tentatively Identified Compound Dil FacPreparedAnalyzedDUnitQualifierEst. Result RT CAS No. <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 />Acetone 23.7 24.4 ug/m3 103 54 -154 <br />Analyte <br />LCS LCS <br />DUnitResultQualifier %Rec <br />Spike <br />Added <br />%Rec <br />Limits <br />Benzene 31.9 31.1 ug/m3 97 73 -119 <br />Benzyl chloride 51.8 47.8 ug/m3 92 60 -136 <br />Bromodichloromethane 67.0 68.4 ug/m3 102 75 -127 <br />Bromoform 103 112 ug/m3 108 53 -149 <br />Bromomethane 38.8 37.9 ug/m3 98 72 -124 <br />1,3-Butadiene 22.1 21.7 ug/m3 98 58 -139 <br />2-Butanone 29.5 29.3 ug/m3 100 72 -124 <br />Carbon disulfide 31.1 32.5 ug/m3 104 71 -138 <br />Carbon tetrachloride 62.9 60.7 ug/m3 97 71 -133 <br />Chlorobenzene 46.0 43.6 ug/m3 95 76 -119 <br />Chloroethane 26.4 26.4 ug/m3 100 68 -130 <br />Chloroform 48.8 50.4 ug/m3 103 73 -124 <br />Chloromethane 20.6 21.7 ug/m3 105 56 -141 <br />Cyclohexane 34.4 33.4 ug/m3 97 76 -124 <br />Dibromochloromethane 85.2 85.9 ug/m3 101 73 -125 <br />1,2-Dibromoethane 76.8 74.3 ug/m3 97 78 -122 <br />1,2-Dichlorobenzene 60.1 57.1 ug/m3 95 68 -129 <br />1,3-Dichlorobenzene 60.1 57.7 ug/m3 96 69 -131 <br />1,4-Dichlorobenzene 60.1 56.4 ug/m3 94 67 -132 <br />Dichlorodifluoromethane 49.4 52.4 ug/m3 106 61 -142 <br />1,1-Dichloroethane 40.5 39.8 ug/m3 98 66 -130 <br />1,2-Dichloroethane 40.5 40.7 ug/m3 100 68 -135 <br />1,1-Dichloroethene 39.6 39.0 ug/m3 98 68 -120 <br />Dichloroethylene, 1,2-, cis-39.6 38.7 ug/m3 98 72 -121 <br />Dichloroethylene, 1,2-, trans-39.6 39.5 ug/m3 100 69 -137 <br />Eurofins Burlington <br />Page 13 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