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Lancasterrt <br /> Laboratories �4 n a 1 ys�_s Report <br /> 2425 New Holland Pike PC Box 12425 Lancaster PA 17605-2425•717 655-2300 Fax 717-656-2661•www lancasterlabs com <br /> Page 5 of 7 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 931384 <br /> Reported 02/24/45 at 11 27 AM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD $ICO DUP DDP DUp RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Nickel 101 103 91-111 2 20 0 0068 0 0085 3 {1) 20 <br /> Zinc 100 102 80-120 2 20 N D N D 54* (1) 20 <br /> Batch number 0504SA56A Sample number(s) 4462622-4462623,4462625-4462626 <br /> TPH-GRO - Waters 112 109 63-154 2 30 <br /> Batch number Y050471AA Sample number(s) 4462623 <br /> Methyl Tertiary Butyl Ether 93 85 69-134 9 30 <br /> Chloromethane 106 102 69-157 4 30 <br /> Vinyl Chloride 105 103 '70-151 2 30 <br /> Bromomethane 91 91 59-143 1 30 <br /> Chloroethane 97 96 63-142 1 30 <br /> Trichlorofluoromethane 108 104 67-163 4 30 <br /> 1,1-Dichloroethene 118 114 78-146 4 30 <br /> Methylene Chloride 104 104 79-133 0 30 <br /> trans-1,2-Dichloroethene 109 108 82-133 0 30 <br /> 1,1-Dichloroethane 107 108 85-135 1 30 <br /> cis-1,2-Dichloroethene 104 104 83-126 0 30 <br /> Chloroform 103 102 02-131 1 30 <br /> 1,1-Trichloroethane 104 104 81-142 0 30 <br /> rbon Tetrachloride 107 104 73-144 3 30 <br /> nzene 109 109 63-128 0 30 <br /> 1,2-Dichlotoethane 97 95 73-136 1 30 <br /> Trichloroethene 106 105 75-135 1 30 <br /> 1,2-Dichloropropane 109 107 81-121 2 30 <br /> Bromodichloromethane 96 96 80-129 0 30 <br /> Toluene 100 99 83-127 0 30 <br /> 1,1,2-Trichloroethane 95 96 77-125 2 30 <br /> Tetrachloroethene 98 98 78-133 0 30 <br /> Dibromochloromethane 96 95 73-119 1 30 <br /> Chlorobenzene 97 96 83-120 1 30 <br /> Ethylbenzene 96 96 82-129 0 30 <br /> m+p-Xylene 97 96 82-130 1 30 <br /> o-Xylene 95 96 62-130 0 30 <br /> Bromoform 94 93 64-119 1 30 <br /> 1,1,2,2-Tetrachloroethane 94 94 69-121 0 30 <br /> 1,3-Dichlorobenzene 96 93 79-123 3 30 <br /> 1,4-Dichlorobenzene 96 95 81-122 1 30 <br /> 1,2-Dichlorobenzene 95 93 82-117 2 30 <br /> trans-1,3-Dichloropropene 91 91 75-117 0 30 <br /> cls-1,3-131chloropropene 106 107 76-117 1 30 <br /> Freon 113 120 118 73-166 1 30 <br /> Batch number Z050462AA Sample numberOs) 4462622,4462625-4462626 <br /> Methyl Tertiary Butyl Ether 98 102 69-134 4 30 <br /> Benzene 102 103 83-128 1 30 <br /> Toluene 108 111 83-127 2 30 <br /> Ethylbenzene 104 106 62-129 2 30 <br /> Xylene (Total) 105 107 82-130 2 30 <br /> Surrogate Quality Control <br /> *-Outside of specification <br /> 1) 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 />