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Lancaster Laboratories <br />• Where quality is a science <br />Quality Control Sunmary <br />Client Name ChevronTexaco <br />Group <br />Number <br />829798 <br />Reported 11/14/02 at <br />05 12 PM <br />N D <br />5 <br />N D <br />5 <br />Laboratory <br />Compliance Quality <br />Control <br />5 <br />Blank Blank <br />Report LCS <br />LCSD <br />LCS/LCSD <br />Analysis Name <br />ReaUlt XDf <br />unite $m89 <br />%RRC <br />Limits <br />Batch number 02316A53A <br />Sample number(s) <br />3935265-3935269 <br />90 <br />51-14B <br />TPH-GRO - Waters <br />N D 50 <br />ug/1 109 <br />107 <br />74-116 <br />Batch number 023170018A <br />Methanol (by Direct Injection) <br />Batch number N023131AA <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 />1,2-13 chloroethane <br />Toluene <br />1,2-Dibromoethane <br />Ethylbenzene <br />Xylene (Total) <br />Sample number(s) 3935265-3935269 <br />N D 200 ug/1 84 <br />Sample number(s) <br />N D <br />50 <br />N D <br />5 <br />N D <br />5 <br />N D <br />5 <br />N D <br />5 <br />N D <br />5 <br />N D <br />5 <br />N D <br />5 <br />N D <br />5 <br />N D <br />5 <br />N D <br />5 <br />N D <br />5 <br />3935265-3935269 <br />ug/1 <br />88 <br />ug/1 <br />97 <br />ug/1 <br />92 <br />Ug/1 <br />89 <br />ug/1 <br />91 <br />ug/1 <br />90 <br />ug/1 <br />104 <br />ug/1 <br />102 <br />Ug/1 <br />105 <br />U9/1 <br />97 <br />ug/1 <br />107 <br />Ug/1 <br />106 <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 />Sample Matrix Quality Control <br />MS MSA MS/MSA RPD BKG DUP <br />Analysis Name _,RSC 3AEC Limits RPD MAX Conc Conc <br />Batch number 02316A53A Sample number(s) 3935265-3935269 <br />TPH-GRO - Waters 96 102 74-132 7 30 <br />Batch number 023170018A Sample number(s) 3935265-3935269 <br />Methanol (by Direct Injection) 88 84 69-127 5 20 <br />Batch number N023132AA <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 TPH-GRO - Waters <br />Batch number 02316A53A <br />Sample number(B) 3935265-3935269 <br />87 <br />84 <br />34-163 <br />4 <br />30 <br />94 <br />92 <br />69-134 <br />2 <br />30 <br />91 <br />89 <br />68-133 <br />2 <br />30 <br />88 <br />85 <br />73-123 <br />3 <br />30 <br />90 <br />88 <br />69-118 <br />2 <br />30 <br />92 <br />90 <br />51-14B <br />2 <br />30 <br />108 <br />105 <br />78-134 <br />2 <br />30 <br />100 <br />98 <br />73-136 <br />2 <br />30 <br />110 <br />107 <br />83-127 <br />3 <br />30 <br />93 <br />91 <br />78-120 <br />2 <br />30 <br />110 <br />108 <br />82-134 <br />2 <br />30 <br />111 <br />107 <br />82-130 <br />4 <br />30 <br />Surrogate Quality Control <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 />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 <br />Page I of 2 <br />RED RPD Max <br />3 30 <br />DUP <br />RPD <br />Dup <br />RPD <br />Max <br />2216 Rev 9/11/00 <br />