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� I <br />Lancaster <br />Laboratories <br />Quality Control Summary <br />' <br />Client Name Chevronmexaco Group Number 637261 <br />Reported 01/23/03 at 02 23 PM <br />' Laboratory Compliance Quality Control. <br />Anal sis Name <br />Batch number 03008A07E <br />TPH-GRO - Waters <br />'Batch number 030130006A <br />Methanol (by Direct In)ection) <br />Batch number N030102AA <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 />Wl <br />a.bromoethane <br />benzene <br />e (Total) <br />Batch number N030102AB <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 />112-Dichloroethane <br />Toluene <br />,1,2-Dmbromoethane <br />Ethylbenzene <br />Xylene (Total) <br />Batch number U030102AC <br />Methyl t -butyl ether <br />Benzene <br />Toluene <br />Ethylbenzene <br />IXylene (Total) <br />Batch number N030121AA <br />Ethanol <br />Methyl t -butyl ether <br />i -Isopropyl ether <br />Ethyl t -butyl ether <br />t -Amyl methyl ether <br />Blank <br />Blank <br />Report LCS <br />LCSD LCS/LCSD <br />Result <br />MDL <br />Units %REC <br />%REC Limits <br />Sample <br />number(s) <br />3975445-3975449 <br />5 <br />N D <br />50 <br />ug/l 104 <br />101 74-116 <br />Sample <br />number(s) <br />3975445-3975448 <br />74-120 <br />N D <br />200 <br />ug/l 88 <br />64-130 <br />Sample <br />number(s) <br />3975445-3975446 <br />ug/l <br />N D <br />50 <br />ug/l 134 <br />43-159 <br />N D <br />5 <br />ug/1 103 <br />77-127 <br />N D <br />5 <br />ug/l 104 <br />74-125 <br />N D <br />5 <br />ug/l 100 <br />74-120 <br />N D <br />5 <br />ug/l 98 <br />71-114 <br />N D <br />5 <br />ug/1 125 <br />59-139 <br />N D <br />5 <br />ug/1 108 <br />85-117 <br />N D <br />5 <br />ug/1 111 <br />77-132 <br />N D <br />5 <br />ug/l 107 <br />85-115 <br />N D <br />5 <br />ug/l 109 <br />81-114 <br />N D <br />5 <br />ug/l 106 <br />82-119 <br />N D <br />5 <br />ug/1 108 <br />84-120 <br />Sample number(s) 3975448 <br />N D <br />50 <br />ug/l <br />134 <br />43-159 <br />N D <br />5 <br />ug/l <br />103 <br />77-127 <br />N D <br />5 <br />ug/l <br />104 <br />74-125 <br />N D <br />5 <br />ug/l <br />100 <br />74-120 <br />N D <br />5 <br />ug/l <br />98 <br />71-114 <br />N D <br />5 <br />ug/l <br />125 <br />59-139 <br />N D <br />5 <br />ug/1 <br />108 <br />85-117 <br />N D <br />5 <br />ug/l <br />111 <br />77-132 <br />N D <br />5 <br />ug/l <br />107 <br />85-115 <br />N D <br />5 <br />ug/l <br />109 <br />81-114 <br />N D <br />5 <br />ug/l <br />106 <br />82-119 <br />N D <br />5 <br />ug/l <br />108 <br />84-120 <br />Sample <br />number(S) <br />3975449 <br />N D <br />5 <br />ug/1 <br />103 <br />77-127 <br />N D <br />5 <br />ug/l <br />108 <br />85-117 <br />N D <br />5 <br />ug/l <br />107 <br />85-115 <br />N D <br />5 <br />ug/l <br />106 <br />82-119 <br />N D <br />5 <br />ug/1 <br />108 <br />84-120 <br />Sample <br />number(s) <br />3975447 <br />N D <br />50 <br />ug/l <br />125 <br />43-159 <br />N D <br />5 <br />ug/l <br />101 <br />77-127 <br />N D <br />5 <br />u9/1 <br />100 <br />74-125 <br />N D <br />5 <br />ug/l <br />96 <br />74-120 <br />N D <br />5 <br />ug/l <br />96 <br />71-114 <br />*- Outside of specification <br />Whe result for one or both determinations was less than five times the LOQ <br />e background result was more than four times the spike added <br />3 <br />Page 1 of 5 <br />RPD RPD Maar <br />30 <br />Lancaster Laboratories, Inc <br />' rA E M B E R <br />®PO <br />2425 New Holland Pike <br />Box 12425 <br />Lancaster PA 17605-2425 <br />717 656 2300 Fax 717-656 2681 <br />3 <br />Page 1 of 5 <br />RPD RPD Maar <br />30 <br />