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I <br /> Lancaster <br /> Laboratories analysis Report <br /> 2425 New Holland Pike,PO Box 12425 Lancaster,PA 17605-2425•717-656 2300 Fax 717-6562681•www lawasterlabs mm <br /> Page 2 of 5 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 874972 <br /> Reported 11/26/03 at 03 44 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result PaL_ Unite %REC %REC Limits RPD RPD Max <br /> Ethylbenzene N D 5 ug/l 87 82-119 <br /> Xylene (Total) N D 5 ug/l 88 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DtTP Dup <br /> RPA <br /> Analysis Namfl $REC %REC Limits RPD MAX COLIC Conc RPD Maxim <br /> Batch number 03321A08C Sample number(s) 4165111 <br /> TPH-GRO - Waters 119 113 63-154 2 30 <br /> Batch number 03321A51A Sample number(s) 4165112-4165121 <br /> TPH-GRO - Waters 126 63-154 <br /> Batch number 033220007A Sample number(B) 4165112-4165121 <br /> Methanol (by Direct Infection) 96 96 73-117 0 20 <br /> Batch number P033213AA Sample number(s) 4165112 <br /> Ethanol 114 111 38-149 3 30 <br /> Methyl Tertiary Butyl Ether 95 95 69-134 0 30 <br /> di-Isopropyl ether 91 91 75-130 0 30 <br /> Ethyl t-butyl ether 94 94 78-119 0 30 <br /> t-Amyl methyl ether 94 95 77-117 1 30 <br /> t-Butyl alcohol 97 98 44-150 1 30 <br /> Benzene 101 101 83-128 0 30 <br /> 1,2-Dichloroethane 95 94 73-136 1 30 <br /> Toluene 102 102 83-127 0 30 <br /> 1,2-Dibromoethane 94 95 78-120 0 30 <br /> Ethylbenzene 101 101 82-129 0 30 <br /> Xylene (Total) 102 102 82-130 0 30 <br /> Batch number P033221AA Sample number(s) 4165115 <br /> Ethanol 106 104 38-149 3 30 <br /> Methyl Tertiary Butyl Ether 98 92 69-134 5 30 <br /> di-Isopropyl ether 94 87 75-130 8 30 <br /> Ethyl It-butyl ether 97 89 78-119 8 30 <br /> t-Amyl methyl ether 100 91 77-117 10 30 <br /> t-Butyl alcohol 104 88 44-150 16 30 <br /> Benzene 109 99 83-128 10 30 <br /> 1,2-Dichloroethane 97 88 73-136 10 30 <br /> Toluene 105 97 83-127 7 30 <br /> 1,2-Dibromoethane 99 90 78-120 10 30 <br /> Ethylbenzene 106 97 82-129 9 30 <br /> Xylene (Total) 107 98 82-130 9 30 <br /> Batch number P033221AB Sample number(s) 4165113-4165114,4165116-4165121 <br /> Ethanol 106 104 38-149 3 30 <br /> Methyl Tertiary Butyl Ether 98 92 69-134 5 30 <br /> di-Isopropyl ether 94 87 75-130 8 30 <br /> Ethyl t-butyl ether 97 89 78-119 8 30 <br /> t-Amyl methyl ether 100 91 77-117 10 30 <br /> t-Butyl alcohol 104 88 44-150 16 30 <br /> Benzene 109 99 83-128 10 30 <br /> 1,2-Dichloroethane 97 88 73-136 10 30 <br /> *-Outside of specification <br /> (1) The result for one or both determinations was less than five times the LOQ <br /> - =(2)—The background result was more than four times the spike added <br />