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QC Sample Results <br /> Client: WSP USA Environment& Infrastructure Inc. Job ID: 580-125173-1 <br /> Project/Site: Olin -Tracy, CA <br /> Method: 8260D - Volatile Organic Compounds by GUMS (Continued) <br /> Lab Sample ID: MB 580-421489/7 Client Sample ID: Method Blank <br /> Matrix: Water Prep Type: Total/NA <br /> Analysis Batch: 421489 <br /> MB MB <br /> Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac <br /> N-Propylbenzene ND 0.30 0.091 ug/L 03/27/2314:13 1 <br /> 2-Chlorotoluene ND 0.50 0.12 ug/L 03/27/2314:13 1 <br /> 4-Chlorotoluene ND 0.30 0.12 ug/L 03/27/2314:13 1 <br /> 1,3,5-Tri methyl benzene ND 0.50 0.15 ug/L 03/27/2314:13 1 <br /> tert-Butylbenzene ND 0.50 0.26 ug/L 03/27/2314:13 1 <br /> 1,2,4-Tri methyl benzene ND 0.50 0.20 ug/L 03/27/2314:13 1 <br /> sec-Butylbenzene ND 1.0 0.17 ug/L 03/27/2314:13 1 <br /> 4-Isopropyltoluene ND 0.50 0.15 ug/L 03/27/2314:13 1 <br /> 1,3-Dichlorobenzene ND 0.30 0.050 ug/L 03/27/2314:13 1 <br /> 1,4-Dichlorobenzene ND 0.30 0.050 ug/L 03/27/2314:13 1 <br /> n-Butylbenzene ND 1.0 0.23 ug/L 03/27/2314:13 1 <br /> 1,2-Dichlorobenzene ND 0.30 0.038 ug/L 03/27/2314:13 1 <br /> 1,2-Dibromo-3-Chloropropane ND 2.0 0.17 ug/L 03/27/2314:13 1 <br /> 1,2,4-Trichlorobenzene ND 0.50 0.17 ug/L 03/27/2314:13 1 <br /> Hexachlorobutadiene ND 0.50 0.067 ug/L 03/27/2314:13 1 <br /> Naphthalene ND 1.0 0.22 ug/L 03/27/2314:13 1 <br /> 1,2,3-Trichlorobenzene ND 0.50 0.15 ug/L 03/27/2314:13 1 <br /> Xylenes,Total ND 0.50 0.15 ug/L 03/27/23 14:13 1 <br /> MB MB <br /> Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac <br /> Toluene-d8(Surr) 98 80-120 03/27/23 14:13 1 <br /> 1,2-Dichloroethane-d4(Surr) 99 80-120 03/27/23 14:13 1 <br /> Lab Sample ID: LCS 580-421489/4 Client Sample ID: Lab Control Sample <br /> Matrix: Water Prep Type: Total/NA <br /> Analysis Batch: 421489 <br /> Spike LCS LCS %Rec <br /> Analyte Added Result Qualifier Unit D %Rec Limits <br /> Dichlorodifluoromethane 5.00 5.27 ug/L 105 20-150 <br /> Chloromethane 5.00 4.45 ug/L 89 32-150 <br /> Vinyl chloride 5.00 5.07 ug/L 101 41-150 <br /> Bromomethane 5.00 5.07 ug/L 101 51-148 <br /> Chloroethane 5.00 5.08 ug/L 102 54-140 <br /> Trichlorofluoromethane 5.00 5.23 ug/L 105 60-132 <br /> 1,1-Dichloroethene 5.00 5.57 ug/L 111 60-129 <br /> 1,1,2-Trichloro-1,2,2-trifluoroetha 5.00 5.47 ug/L 109 62-133 <br /> ne <br /> Carbon disulfide 5.00 4.98 ug/L 100 54-142 <br /> Acetone 25.0 30.2 ug/L 121 49-150 <br /> Methylene Chloride 5.00 5.56 ug/L 111 40-142 <br /> Methyl tert-butyl ether 5.00 5.00 ug/L 100 61-131 <br /> Vinyl acetate 12.5 12.5 ug/L 100 38-150 <br /> trans-1,2-Dichloroethene 5.00 5.33 ug/L 107 69-121 <br /> 1,1-Dichloroethane 5.00 4.90 ug/L 98 74-120 <br /> 2,2-Dichloropropane 5.00 4.48 ug/L 90 55-140 <br /> cis-1,2-Dichloroethene 5.00 5.20 ug/L 104 72-120 <br /> 2-Butanone(MEK) 25.0 27.5 ug/L 110 37-150 <br /> Chlorobromomethane 5.00 5.17 ug/L 103 79-121 <br /> Chloroform 5.00 4.97 ug/L 99 75-120 <br /> Eurofins Seattle <br /> Page 27 of 37 3/30/2023 <br />