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0 <br />I <br />A <br />Lancaster <br />Laboratories <br />Quality Control Summary <br />Client Name ChevronTexaco Group Number 835446 <br />Reported 12/31/02 at 08 42 PM <br />Laboratory Compliance Quality Control <br />Sample Matrix Quality Control. <br />Blank <br />Blank <br />Report <br />LCS <br />LCSD LCS/LCSD <br />analysis Name <br />Result <br />MDL <br />nitsREC <br />RPD <br />RRC Limits <br />Batch number 02354B56A <br />Sample <br />number(s) <br />3965838-3965841 <br />TPH-GRO - Waters <br />TPH-GRO - Waters <br />N D <br />50 <br />ug/1 <br />91 <br />96 74-116 <br />Batch number 023640013A <br />Sample <br />number(S) <br />3965838-3965841 <br />92 <br />69-127 <br />Methanol (by Direct Infection) <br />N D <br />200 <br />ug/l <br />96 <br />64-130 <br />Batch number N023601AA <br />Sample <br />number(s) <br />3965838-3965842 <br />7 <br />30 <br />Ethanol <br />N D <br />50 <br />ug/l <br />108 <br />43-159 <br />Methyl t -butyl ether <br />N D <br />5 <br />ug/l <br />107 <br />77-127 <br />di -Isopropyl ether <br />N D <br />5 <br />ug/l <br />106 <br />74-125 <br />Ethyl t -butyl ether <br />N D <br />5 <br />ug/1 <br />102 <br />74-120 <br />t -Amyl methyl ether <br />N D <br />5 <br />ug/l <br />101 <br />71-114 <br />t -Butyl alcohol <br />N D <br />5 <br />ug/1 <br />102 <br />59-139 <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 />106 <br />77-132 <br />Toluene <br />N D <br />5 <br />ug/l <br />105 <br />85-115 <br />1,2-Dlbromoethane <br />N D <br />5 <br />ug/l <br />100 <br />81-114 <br />Ethylbenzene <br />N D <br />5 <br />ug/1 <br />110 <br />82-119 <br />Xylene (Total) <br />N D <br />5 <br />ug/l <br />107 <br />84-120 <br />Sample Matrix Quality Control. <br />Surrogate Quality Control <br />Analysis Name TPH-GRO - Waterer <br />Batch number 02354B56A <br />*- Outside of specification <br />(1) The result for one or both determinations was less than five times the LOQ <br />0 The background result was more than four times the spike added <br />Page 1 of 2 <br />RPD RPD Max <br />9 <br />DUP <br />RPD <br />30 <br />Dup <br />RPD <br />Max <br />Lancaster Laboratories, Inc <br />M J M B B R 2425 New Holland Pike <br />® Bax 1 <br />Lancaster, <br />PA PA 17605-2475 <br />717 656-2300 Fax 717-656-2681 2216 Rev 10/2/02 <br />MS <br />MSD <br />MS/MSD <br />RPD BKO DUP <br />Analysis Name <br />%REC <br />%REC <br />Limits <br />RPD <br />MAX cone Cone <br />Batch number 02354B56A <br />Sample <br />number(s) 3965838-3965841 <br />TPH-GRO - Waters <br />98 <br />74-132 <br />Batch number 023640013A <br />Sample <br />number(s) 3965838-3965841 <br />Methanol (by Direct Injection) <br />92 <br />92 <br />69-127 <br />0 <br />20 <br />Batch number N023601AA <br />Sample <br />number(s) <br />3965838-3965842 <br />Ethanol <br />81 <br />64 <br />34-163 <br />7 <br />30 <br />Methyl t -butyl ether <br />101 <br />102 <br />69-134 <br />0 <br />30 <br />di -Isopropyl ether <br />104 <br />104 <br />68-133 <br />0 <br />30 <br />Ethyl t -butyl ether <br />99 <br />101 <br />73-123 <br />2 <br />30 <br />t -Amyl methyl ether <br />99 <br />98 <br />69-118 <br />0 <br />30 <br />t -Butyl alcohol <br />73 <br />72 <br />51-148 <br />2 <br />30 <br />Benzene <br />114 <br />112 <br />78-134 <br />2 <br />30 <br />1,2-Dxchloroethane <br />109 <br />108 <br />73-136 <br />1 <br />30 <br />Toluene <br />110 <br />108 <br />63-127 <br />1 <br />30 <br />1,2-Dibromoethane <br />98 <br />97 <br />78-120 <br />2 <br />30 <br />Ethylbenzene <br />110 <br />107 <br />82-134 <br />2 <br />30 <br />Xylene (Total) <br />111 <br />109 <br />82-130 <br />1 <br />30 <br />Surrogate Quality Control <br />Analysis Name TPH-GRO - Waterer <br />Batch number 02354B56A <br />*- Outside of specification <br />(1) The result for one or both determinations was less than five times the LOQ <br />0 The background result was more than four times the spike added <br />Page 1 of 2 <br />RPD RPD Max <br />9 <br />DUP <br />RPD <br />30 <br />Dup <br />RPD <br />Max <br />Lancaster Laboratories, Inc <br />M J M B B R 2425 New Holland Pike <br />® Bax 1 <br />Lancaster, <br />PA PA 17605-2475 <br />717 656-2300 Fax 717-656-2681 2216 Rev 10/2/02 <br />