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Lancaster Laboratories <br /> Where quality is a science. <br /> IPage 2 of 4 <br /> Quality Control Summary <br />' Client Blame: ChevronTexaco Group Number: 823136 <br /> Reported: 10/04/02 at 03 :47 PM <br />' Analysis Name %REC %REC Limits RPD MAX Conc Conc RPA Max <br /> Batch number: 0226IA53A Sample number(s) : 3900369-3900375 <br /> TPH-GRO - Waters 117 74-132 <br />' Batch number: 022630004A Sample numberis) : 3900369 <br /> Methanol (by Direct Injection) 104 104 69-127 0 20 <br /> Batch number: 022740008A Sample number{s) : 3900370-3900374 <br /> Methanol (by Direct Injection) 96 100 69-127 4 20 <br />' Batch number: N022672AA Sample number(sp : 3900369-3900372 <br /> Ethanol 72 76 34-163 5 30 <br /> Methyl t-butyl ether 107 106 69-134 0 30 <br /> di-Isopropyl ether 96 96 68-133 1 30 <br /> Ethyl t-butyl ether 93 94 73-123 1 30 <br /> t-Amyl methyl ether 95 96 69-118 1 30 <br /> t-Butyl alcohol 89 88 51-148 2 30 <br /> Benzene 113 113 78-134 0 30 <br /> 1,2-D,chloroethane 112 110 73-136 1 30 <br /> Toluene 112 114 83-127 1 30 <br />' 1,2-Dibromoethane 91 90 78-120 0 30 <br /> Ethylbenzene 114 113 82-134 0 30 <br /> Xylene (Total) 106 107 82-130 1 30 <br /> Batch number: N022672AB Sample number{s) : 3900373-3900374 <br /> hanol 72 76 34-163 5 30 <br />' thyl t-butyl ether 107 106 69-134 0 30 <br /> a.-Isopropyl ether 96 96 68-133 1 30 <br /> Ethyl t-butyl ether 93 94 73-123 1 30 <br /> t-Amyl methyl ether 95 96 69-118 1 30 <br />' t-Butyl alcohol 89 88 51-148 2 30 <br /> 1,2-Dichloroethane 112 110 73-136 1 30 <br /> 1,2-Dibromoethane 91 90 78-120 0 30 <br /> Ethylbenzene 114 113 82-134 0 30 <br />' Batch number: N022672AC Sample number(s) : 3900373-3900375 <br /> Methyl t-butyl ether 107 106 69-134 0 30 <br /> Benzene 113 113 78-134 0 30 <br /> Toluene 112 114 83-127 1 30 <br /> Ethylbenzene 114 113 82-134 0 30 <br />' Xylene (Total) 106 107 82-130 1 30 <br />' Surrogate Quality Control <br /> Analysis Name: TPH-GRO - Waters <br /> Batch number: 02261A53A <br /> Trifluorotoluene-F <br />' 3900369 87 <br /> 3900370 80 <br /> 3900371 85 <br /> 3900372 91 <br />' 3900373 8s <br /> 3900374 81 <br /> 3900375 85 <br /> Blank 85 <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 /> 1 <br /> Lancaster Laboratories, Inc. <br /> M E M 13 E iR 2425 New Holland Pike <br /> 11111110 PO Box 12425 <br /> Lancaster,P 1 <br /> 717-656-2300O Fax f,�x 7 7177 656-2681 2216 Rev.9111/00 <br />