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Lancaster <br />• Laboratories <br />Quality Control Summary <br />Client Name ChevronTexaco <br />%RRC <br />Limits <br />Group <br />Number <br />840483 <br />Reported 02/20/03 at 02 <br />30 PM <br />118 <br />30 <br />70-130 <br />3 <br />30 <br />Laboratory <br />Compliance Quality <br />Control <br />88 <br />Blank <br />Blank <br />Report <br />LCS <br />LCSD <br />LCS/LCSD <br />Analysis Name <br />Result <br />HL <br />Unita <br />%REC <br />%REC <br />Limits <br />Batch number 03037A55A <br />Sample <br />number(s) <br />3990504-3990507 <br />30 <br />95 <br />TPH-GRO - Waters <br />N D <br />50 <br />ug/1 <br />105 <br />103 <br />70-130 <br />Batch number 030430017A <br />Sample <br />number(s) <br />3990504-3990507 <br />77-117 <br />0 <br />Methanol (by Direct Infection) <br />N D <br />200 <br />ug/1 <br />88 <br />30 <br />64-130 <br />Batch number P030401AA <br />Sample <br />number(s) <br />3990504-3990507 <br />110 <br />106 <br />Ethanol <br />N D <br />5o <br />ug/1 <br />83 <br />83-127 <br />43-159 <br />Methyl Tertiary Butyl Ether <br />N D <br />5 <br />ug/1 <br />108 <br />30 <br />77-127 <br />di -Isopropyl ether <br />N D <br />5 <br />ug/l <br />94 <br />109 <br />74-125 <br />Ethyl t -butyl ether <br />N D <br />5 <br />ug/1 <br />99 <br />74-120 <br />t -Amyl methyl ether <br />N D <br />5 <br />ug/1 <br />103 <br />79-113 <br />t -Butyl alcohol <br />N D <br />5 <br />ug/1 <br />106 <br />53-147 <br />Benzene <br />N D <br />5 <br />ug/1 <br />106 <br />85-117 <br />1,2-Dichloroethane <br />N D <br />5 <br />ug/l <br />108 <br />77-132 <br />Toluene <br />N D <br />5 <br />ug/1 <br />103 <br />85-115 <br />1,2-Dibromoethane <br />N D <br />5 <br />ug/1 <br />105 <br />81-114 <br />Ethylbenzene <br />N D <br />5 <br />ug/1 <br />102 <br />82-119 <br />Xylene (Total) <br />N D <br />5 <br />ug/1 <br />106 <br />84-120 <br />number P030441AA <br />Sample <br />number(s) <br />3990508 <br />itch <br />thyl Tertiary Butyl Ether <br />N D <br />5 <br />ug/l <br />110 <br />108 <br />77-127 <br />nzene <br />N D <br />5 <br />ug/1 <br />105 <br />107 <br />85-117 <br />Toluene <br />N D <br />5 <br />ug/1 <br />100 <br />105 <br />85-115 <br />Ethylbenzene <br />N D <br />5 <br />ug/1 <br />102 <br />105 <br />82-119 <br />Xylene (Total) <br />N D <br />5 <br />ug/l <br />104 <br />108 <br />84-120 <br />Analysis Name <br />Batch number 03037A55A <br />TPH-GRO - Waters <br />Batch number 030430017A <br />Methanol (by Direct In3ection) <br />Batch number P030401AA <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 />Sample Matrix Quality control <br />MS MSD MS/MSD RPD BKG DUP <br />%REC <br />%RRC <br />Limits <br />RPD <br />MAX Conn <br />Sample <br />number(s) <br />3990504-3990507 <br />118 <br />30 <br />70-130 <br />3 <br />30 <br />Sample <br />number(s) <br />3990504-3990507 <br />88 <br />88 <br />69-127 <br />0 <br />20 <br />Sample <br />number(s) <br />3990504-3990507 <br />99 <br />85 <br />34-163 <br />15 <br />30 <br />109 <br />107 <br />69-134 <br />1 <br />30 <br />95 <br />94 <br />75-130 <br />1 <br />30 <br />100 <br />98 <br />73-123 <br />2 <br />30 <br />107 <br />108 <br />77-117 <br />0 <br />30 <br />109 <br />104 <br />39-155 <br />5 <br />30 <br />113 <br />110 <br />83-128 <br />2 <br />30 <br />110 <br />106 <br />73-136 <br />4 <br />30 <br />110 <br />107 <br />83-127 <br />3 <br />30 <br />107 <br />106 <br />78-120 <br />1 <br />30 <br />110 <br />108 <br />82-134 <br />2 <br />30 <br />111 <br />109 <br />82-130 <br />2 <br />30 <br />*- Outside of specification <br />The result for one or both determinations was less than five times the LOQ <br />The background result was more than four times the spike added <br />Conc <br />Page l of 3 <br />RPAPD Max <br />2 30 <br />2 <br />30 <br />2 <br />30 <br />4 <br />30 <br />3 <br />30 <br />3 <br />30 <br />DUP <br />Dup <br />RPD <br />RPA <br />Max <br />Lancaster Laboratories Inc <br />M E M B E R 2425 New Holland Pike <br />PO Box 12425 <br />Lancaster PA 17605 2425 <br />717-656.2300 Fax 717 656-2681 2216 Rev 1012/02 <br />