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Lancaster <br /> Laboratories Analysis Report <br /> 41.t <br /> Holland Pike PO Box 12425 Lancaster PA 17605-2425.717-656-2300 Fax 717-656-2681•www Iancasterlat73 com <br /> Page 6 of 8 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 872925 <br /> Reported 11/12/03 at 04 33 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BRG DDP DUP Dup <br /> RPD <br /> Analysis Name %RE,C %RBC Limits RPD MAX Cone Conc RPD Maxim <br /> 1,2-Dichloropropane 105 104 81-121 17- 30 <br /> Dibromomethane 103 104 83-120 1 30 <br /> Bromodi chi oromet hane 102 101 83-121 1 30 <br /> Toluene 101 102 83-127 1 30 <br /> 1,1,2-Trichloroethane 94 96 77-125 2 30 <br /> Tetrachloroethane 104 106 75-143 1 30 <br /> 1,3-Dichloropropane 98 98 82-121 1 30 <br /> Dibromochloromethane 98 97 73-119 1 30 <br /> 1,2-Dibromoethane 97 97 78-120 0 30 <br /> Chlorobenzene 101 101 83-120 0 30 <br /> 1,1,1,2-Tetrachloroethane 98 100 83-119 2 30 <br /> Ethylbenzene 101 100 82-129 1 30 <br /> m+p-Xylene 102 101 82-130 1 30 <br /> o-Xylene 101 99 82-130 2 30 <br /> Styrene 97 98 72-133 1 30 <br /> Bromoform 92 94 64-119 3 30 <br /> Isopropylbenzene 101 102 81-130 1 30 <br /> 1,1,2,2-Tetrachloroethane 92 96 69-121 5 30 <br /> Bromobenzene 100 102 83-121 2 30 <br /> 1,2,3-Trichloropropane 93 97 73-125 3 30 <br /> ,Propylbenzene 101 104 78-131 2 30 <br /> Chlorotoluene 102 103 78-121 1 30 <br /> 3,5-Trimethylbenzene 99 101 74-130 2 30 <br /> 4-Chlorotoluene 103 102 81-123 1 30 <br /> tert-Butylbenzene 100 101 76-128 1 30 <br /> 1,2,4-Trimethylbenzene 100 102 75-132 2 30 <br /> sec-Butylbenzene 100 102 73-129 2 30 <br /> p-Isopropyltoluene 98 101 72-128 3 30 <br /> 1,3-Dichlorobenzene 99 101 79-123 1 30 <br /> 1,4-Dichlorobenzene 98 102 81-122 4 30 <br /> n-Butylbenzene 98 100 66-131 3 30 <br /> 1,2-Dichlorobenzene 98 101 82-117 3 30 <br /> 1,2-Dibromo-3-chloropropane 90 93 53-125 4 30 <br /> 1,2,4-Trichlorobenzene 95 97 66-121 2 30 <br /> Hexachlorobutadiene 86 90 52-132 4 30 <br /> Naphthalene 91 96 59-124 6 30 <br /> 1,2,3-Trichlorobenzene 94 96 66-121 2 30 <br /> Acetone 55 56 16-147 1 30 <br /> Carbon Disulfide 116 116 77-155 0 30 � <br /> 2-Butanone 73 77 42-140 5 30 <br /> trans-1,3-Dichloropropene 99 97 75-117 2 30 <br /> cis-1,3-Dichloropropene 102 102 76-117 0 30 <br /> 4-Methyl-2-pentanone 88 90 61-126 2 30 <br /> 2-Hexanone 78 81 48-133 3 30 <br /> 2-Chloroethyl vinyl Ether 14 21 1-172 39* 30 <br /> Freon 113 108 107 81-155 0 30 <br /> Batch number P033072AA Sample number(s) 4154247,4154250-4154252 <br /> Methyl Tertiary Butyl Ether 100 102 69-134 2 30 <br /> Benzene 110 112 83-128 1 30 <br /> Toluene 113 113 83-127 0 30 <br /> Ethylbenzene 112 113 82-129 0 30 <br /> Xylene (Total) 115 114 82-130 1 30 <br /> *-Outside of specification <br /> The result for one or both determinations was less than five times the LOQ <br /> The background result was more than four times the spike added <br />