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I1� Lancaster <br />Laboratories <br />Quality Control Summary <br />Client Name ChevronTexaco Group Number 845781 <br />Reported 04/03/03 at 10 50 AM <br />' Laboratory Compliance Quality Control <br />'Analysis Name <br />Batch number 030830003A <br />Methanol (by Dsrect 1n)ectxon) <br />'Batch number 03083A16A <br />TPH-GRO - Waters <br />Batch number 03083ASlB <br />TPH-GRO - Waters <br />Batch number P030852AA <br />Ethanol <br />Methyl Tertiary Butyl Ether <br />di -Isopropyl ether <br />Ethyl t -butyl ether <br />t -Amyl methyl ether <br />' til alcohol <br />ene <br />Dichloroethane <br />Toluene <br />1,2-Dibromoethane <br />Ethylbenzene <br />Xylene (Total) <br />Batch number P030862AA <br />Ethanol <br />Methyl Tertiary 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 />11 <br />11 <br />Blank Blank <br />Report LCS <br />Result MDL <br />Unita %REC <br />Sample numbers) <br />4016357-4016361 <br />N D 200 <br />ug/l 96 <br />Sample number(S) 4016357-4016359 <br />N D 50 ug/1 105 <br />Sample number(s) 4016360-4016361 <br />N D 50 ug/l 94 <br />Sample number(S) 4016358-4016361 <br />N D <br />50 <br />ug/l <br />107 <br />N D <br />5 <br />ug/1 <br />98 <br />N D <br />5 <br />ug/l <br />102 <br />N D <br />5 <br />ug/1 <br />102 <br />N D <br />5 <br />ug/1 <br />100 <br />N D <br />5 <br />ug/l <br />100 <br />N D <br />5 <br />ug/l <br />99 <br />N D <br />5 <br />ug/1 <br />104 <br />N D <br />5 <br />ug/1 <br />99 <br />N D <br />5 <br />ug/1 <br />99 <br />N D <br />5 <br />ug/l <br />102 <br />N D <br />5 <br />ug/l <br />102 <br />Sample number(s) 4016357 <br />N D <br />50 <br />ug/l <br />108 <br />N D <br />5 <br />ug/l <br />99 <br />N D <br />5 <br />ug/1 <br />106 <br />N D <br />5 <br />ug/l <br />103 <br />N D <br />5 <br />ug/l <br />100 <br />N ❑ <br />5 <br />ug/1 <br />101 <br />N D <br />5 <br />ug/l <br />101 <br />N D <br />5 <br />ug/l <br />104 <br />N D <br />5 <br />ug/1 <br />102 <br />N D <br />5 <br />ug/l <br />98 <br />N D <br />5 <br />ug/1 <br />102 <br />N D <br />5 <br />ug/l <br />103 <br />LCSD <br />LCS/LCSD <br />%REC <br />Lino is <br />78-114 <br />117 <br />70-130 <br />94 <br />70-130 <br />43-159 <br />77-127 <br />74-125 <br />74-120 <br />79-113 <br />53-147 <br />85-117 <br />77-132 <br />85-115 <br />81-114 <br />82-119 <br />84-120 <br />43-159 <br />77-127 <br />74-125 <br />74-120 <br />79-113 <br />53-147 <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 MSD MS/MSD RPD BACs DUP <br />*- Outside of specification <br />The result for one or both determinations was less than five tunes the LOQ <br />The background result was more than four times the spike added <br />Lancaster Laboratories Inc <br />ME M B E R 2425 New Holland Pike <br />®PO Box 12425 <br />Lancaster 17605 <br />717 656-230000 Fax 71717 656 2684 <br />Page 1 of 4 <br />RPD RPD Max <br />11 30 <br />0 30 <br />DUP <br />Dup <br />RPD <br />2216 Rev 1012107 <br />