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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike PO Box 12425 Lancaster,PA 17605-2425-717-6562300 Fax 717 656-2681-WWW lancasterlabs com Im <br /> Pagel of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 858712 <br /> Reported 07/18/03 at 02 58 PM <br /> Laboratory Compliance Quality Control <br /> Hlank Blank Report LCS LCSD LCS/LCSD <br /> Angly_pis Name Result MDL Unite %REC %REC Limi a RPD RPD Max <br /> Batch number 0319OA07C Sample number(s) 4078851-4078854 <br /> TPH-GRO - Waters — N D - 5o _ug/l =93 - 97 70-130 4 30 - <br /> Batch number 031920002A Sample number(s) 4078852-4078854 <br /> Methanol (by Direct Infection) N D 200 ug/l 68 78-114 <br /> Batch number N031921AA Sample number(s) 4078852-4078854 <br /> Ethanol N D 50 ug/l 80 43-159 <br /> Methyl Tertiary Butyl Ether N D 5 u9/1 104 77-127 <br /> di-Isopropyl ether N D 5 ug/l 102 74-125 <br /> Ethyl t-butyl ether N ❑ 5 ug/l 96 74-120 <br /> t-Amyl methyl ether N D 5 ug/1 100 79-113 <br /> t-Butyl alcohol N D 5 ug/1 98 53-147 <br /> Benzene N D 5 ug/1 112 85-117 <br /> 1,2-Dichloroethane N D S ug/l 110 77-132 <br /> Toluene N D 5 ug/l 109 85-115 <br /> 1,2-Dibromoethane N D 5 ug/l 103 81-114 <br /> Ethylbenzene N D 5 ug/l 109 82-119 <br /> m+p-Xylene N D 5 ug/l 111 84-120 <br /> o-Xylene N D 5 ug/l 111 84-120 <br /> Acetone N D 6 ug/l 88 33-179 <br /> Batch number P031922AA Sample number(s) 4078851 <br /> Methyl Tertiary Butyl Ether N D 5 ug/l 91 77-127 <br /> Benzene N D 5 ug/l 91 85-117 <br /> Toluene N ❑ 5 ug/l 98 85-115 <br /> Ethylbenzene N D 5 ug/l 95 82-119 <br /> Xylene (Total) N D 5 ug/l 97 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 03190A07C Sample number(a) 4078851-4078854 <br /> TPH-GRO - Waters 113 70-130 <br /> Batch number 031920002A Sample number(s) 4078852-4078854 <br /> Methanol (by Direct Infection) 88 88 76-116 0 20 <br /> Batch number N031921AA Sample number(s) 4076852-4078854 <br /> Ethanol 89 91 34-163 2 30 <br /> Methyl Tertiary Butyl Ether 104 105 69-134 1 30 <br /> di-Isopropyl ether 104 102 75-130 2 30 <br /> Ethyl t-butyl ether 98 97 73-123 0 30 <br /> t-Amyl methyl ether 100 99 77-117 1 30 <br /> t-Butyl alcohol 102 103 39-155 1 30 <br /> Benzene 116 114 83-128 2 30 <br /> 1,2-Dichloroethane 112 111 73-136 1 30 <br /> Toluene 113 112 83-127 1 30 <br /> 1,2-Dibromoethane 105 104 78-120 1 30 <br /> Ethylbenzene 113 113 82-134 0 30 <br /> m+p-Xylene 116 114 82-130 1 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 />