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Lancaster <br />. Laboratories REPRINT <br />Quality Control Summary <br />Client Name: ChevronTexaco Group Number: 833534 <br />Reported: 01/02/03 at: 03:52 PM <br />Laboratory Compliance Quality Control <br />Analysis Name <br />Batch number: 02343A16A <br />TPH-GRO - Waters <br />Batch number: 023460023A <br />Methanol (by Direct injection) <br />Batch number: N023441AA <br />Ethanol <br />Methyl t -butyl ether <br />di -Isopropyl ether <br />Ethyl t -butyl ether <br />t -Amyl methyl ether <br />t -Butyl alcohol <br />Benzene <br />1,2-Dichloroethane <br />Toluene <br />,r 2-Dibromoethane <br />r %ylbenzene <br />gene (Total)` <br />Batch number: N023442AA <br />Ethanol <br />Methyl, t -butyl ether <br />di -Isopropyl ether <br />Ethyl t -butyl ether <br />t -Amyl methyl ether <br />t -Butyl alcohol <br />Benzene <br />1,2-Dichloroethane <br />Toluene <br />1,2-Dibromoethane <br />Ethylbenzene <br />Xylene (Total) <br />Analysis Name <br />Batch number: 02343AIGA <br />TPH-GRO - Waters <br />Blank <br />Blank <br />Report LCS <br />Result <br />MDL <br />Units <br />%REC <br />Sample <br />number(s): <br />3955354-3955358 <br />N.D. <br />50. <br />ug/l <br />108 <br />Sample <br />number(s): <br />3955354-3955357 <br />N.D. <br />200. <br />ug/l <br />92 <br />Sample <br />number(s): <br />3955354 <br />N.D. <br />50. <br />ug/l <br />95 <br />N.D. <br />.5 <br />ug/l <br />96 <br />N.D. <br />.5 <br />ug/l <br />94 <br />N.D. <br />.5 <br />ug/l <br />104 <br />N.D. <br />.5 <br />ug/l <br />99 <br />N.D. <br />S. <br />ug/l <br />113 <br />N.D. <br />.5 <br />u9/1 <br />106 <br />N.D. <br />.5 <br />u9/1 <br />94 <br />N.D. <br />.5 <br />ug/1 <br />103 <br />N.D. <br />5 <br />ug/l <br />105 <br />N.D. <br />.5 <br />ug/l <br />101 <br />N.D. <br />.5 <br />ug/l <br />105 <br />Sample <br />number(s): <br />3955355-3955358 <br />N.D. <br />50. <br />ug/l <br />80 <br />N.D. <br />.5 <br />ug/l <br />91 <br />N.D. <br />.5 <br />ug/l <br />86 <br />N.D. <br />5 <br />ug/l <br />99 <br />N.D. <br />5 <br />ug/l <br />93 <br />N.D. <br />5. <br />ug/l <br />109 <br />N.D. <br />.5 <br />ug/l <br />101 <br />N.D. <br />.5 <br />ug/1 <br />93 <br />N.D. <br />5 <br />ug/l <br />102 <br />N.D. <br />.5 <br />ug/l <br />106 <br />N.D. <br />.5 <br />ug/l <br />100 <br />N.D. <br />.5 <br />ug/i <br />103 <br />LCSD LCS/LCSD <br />%RSC Limits <br />116 74-116 <br />64-130 <br />43-159 <br />77-127 <br />74-125 <br />74-120 <br />71-114 <br />59-139 <br />85-117 <br />77-132 <br />85-115 <br />81-114 <br />82-119 <br />84-120 <br />r <br />43-159 <br />77-127 <br />74-125 <br />74-120 <br />71-114 <br />59--139 <br />85-117 <br />77-132 <br />85=115 <br />81-114 <br />82-119 <br />84-120 <br />Sample Matrix Quality Control <br />MS MSA MS/MSD RPD BKa DUP <br />%REC %RBC r,imits RPD MAX Conc Conc <br />Sample number(s): 3955354--3955358 <br />114 122 74-132 7 30 <br />*- Outside of specification <br />(1) The result for one or both determinations was less than five times the LOQ. <br />(12� The background result was more than four times the spike added. <br />Lancaster Laboratories, Inc. <br />MEMBER 2425 New Holland Pike <br />®PO Box 12425 <br />Lancaster, PA 17605-2425 <br />717-656-2300 Fax: 717-656-2681 <br />Page 1 of 4 <br />RPD RPD Max <br />7 30 <br />DUP <br />RPD <br />DUP <br />RPD <br />Max <br />2216 Rev. 10/2/02 <br />