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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: LCSD 580-421489/5 Client Sample ID: Lab Control Sample Dup <br /> Matrix: Water Prep Type: Total/NA <br /> Analysis Batch: 421489 <br /> Spike LCSD LCSD %Rec RPD <br /> Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit <br /> 1,1,1,2-Tetrachloroethane 5.00 4.53 ug/L 91 69-127 3 22 <br /> • <br /> Ethylbenzene 5.00 4.79 ug/L 96 80-124 3 22 <br /> m-Xylene&p-Xylene 5.00 4.74 ug/L 95 75-124 1 22 <br /> o-Xylene 5.00 4.76 ug/L 95 71-124 2 23 <br /> Styrene 5.00 4.64 ug/L 93 74-127 2 22 <br /> Bromoform 5.00 3.77 ug/L 75 48-127 1 23 <br /> Isopropylbenzene 5.00 4.73 ug/L 95 71-123 1 23 <br /> Bromobenzene 5.00 4.86 ug/L 97 74-130 3 23 <br /> 1,1,2,2-Tetrachloroethane 5.00 5.08 ug/L 102 67-136 1 24 <br /> 1,2,3-Trichloropropane 5.00 5.22 ug/L 104 67-135 1 25 <br /> N-Propylbenzene 5.00 4.73 ug/L 95 72-126 3 20 <br /> 2-Chlorotoluene 5.00 4.93 ug/L 99 73-120 1 22 <br /> 4-Chlorotoluene 5.00 4.78 ug/L 96 75-124 3 23 <br /> 1,3,5-Tri methyl benzene 5.00 4.61 ug/L 92 75-123 4 23 <br /> tert-Butylbenzene 5.00 4.68 ug/L 94 70-129 3 24 <br /> 1,2,4-Tri methyl benzene 5.00 4.64 ug/L 93 71-127 3 23 <br /> sec-Butylbenzene 5.00 4.69 ug/L 94 75-126 2 23 <br /> 4-Isopropyltoluene 5.00 4.73 ug/L 95 78-125 4 24 <br /> 1,3-Dichlorobenzene 5.00 5.05 ug/L 101 72-125 1 22 <br /> 1,4-Dichlorobenzene 5.00 4.99 ug/L 100 71-129 4 22 <br /> n-Butylbenzene 5.00 4.53 ug/L 91 69-127 6 24 <br /> 1,2-Dichlorobenzene 5.00 5.06 ug/L 101 72-129 4 22 <br /> 1,2-Dibromo-3-Chloropropane 5.00 3.86 ug/L 77 55-135 4 29 <br /> 1,2,4-Trichlorobenzene 5.00 4.93 ug/L 99 60-130 2 26 <br /> Hexachlorobutadiene 5.00 4.73 ug/L 95 63-130 4 26 <br /> Naphthalene 5.00 4.90 ug/L 98 54-137 2 28 <br /> 1,2,3-Trichlorobenzene 5.00 5.01 ug/L 100 60-136 1 28 <br /> LCSD LCSD <br /> Surrogate %Recovery Qualifier Limits <br /> Toluene-d8(Surr) 99 80-120 <br /> 1,2-Dichloroethane-d4(Surr) 98 80-120 <br /> Lab Sample ID: MB 580-421619/7 Client Sample ID: Method Blank <br /> Matrix: Water Prep Type: Total/NA <br /> Analysis Batch: 421619 <br /> MB MB <br /> Analyte Result Qualifier RL MDL Unit D Prepared Analyzed Dil Fac <br /> Acetone ND 10 3.1 ug/L 03/28/2315:23 1 <br /> Chloroform ND 0.20 0.030 ug/L 03/28/2315:23 1 <br /> MB MB <br /> Surrogate %Recovery Qualifier Limits Prepared Analyzed Dil Fac <br /> Toluene-d8(Surr) 105 80-120 03/28/23 15:23 1 <br /> 1,2-Dichloroethane-d4(Surr) 108 80-120 03/28/23 15:23 1 <br /> Eurofins Seattle <br /> Page 30 of 37 3/30/2023 <br />