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Al <br />Lancaster <br />. Laboratories <br />Quality Control Summary <br />Client Name: ChevronTexaco <br />Reported: 12/31/02 at 08:42 PM Croup Number: 835446 <br />Laboratory Compliance Quality Control <br />Batch number: 02354B56A <br />TPH-GRO - Waters <br />Batch number: 023640013A <br />Methanol (by Direct Injection) <br />Batch number: U023601AA <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 />'. <br />Analysis Name <br />Batch number: 02354B56A <br />TPH-GRO - Waters <br />Batch number: 023640013A <br />Methanol (by Direct Injection) <br />Batch number: N023601AA <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: 02354B56A <br />Blank Blank <br />Realilt ML <br />Sample number(s) <br />N.D. 50. <br />Report LCS <br />Unita MEC <br />3965838-3965841 <br />ug/1 91 <br />Sample number(s): 3965838-3965841 <br />N.D. 200. ug/1 96 <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 />K. D. <br />.5 <br />N. D. <br />.5 <br />N -D. <br />.5 <br />N.D_ <br />.5 <br />N.D_ <br />_5 <br />3965838-3965842 <br />ug/l <br />108 <br />ug/1 <br />107 <br />ug/1 <br />106 <br />ug/l <br />102 <br />ug/l <br />101 <br />ug/1 <br />102 <br />Ug/1 <br />106 <br />ug/1 <br />106 <br />ug/1 <br />105 <br />u9/1 <br />100 <br />ug/1 <br />110 <br />ug/1 <br />107 <br />LCSD LCS/LCSD <br />$RSC Limits <br />96 74-116 5 <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 />Page 1 of 2 <br />RPD RPD Max <br />Sample Matrix Quality Control <br />MS MSD MS/MSD RPD BKG DUP <br />DUP <br />%REC $RLC Limits RPD MAIL Conc <br />Sample number(s): 3965838-3965841 <br />98 74-132 <br />Sample <br />number(s), 3965838-3965841 <br />92 <br />92 <br />69-127 <br />0 <br />20 <br />Sample <br />nurnber(s): <br />3965838-3965842 <br />81 <br />64 <br />34-163 <br />7 <br />30 <br />101 <br />102 <br />69-134 <br />0 <br />30 <br />104 <br />104 <br />68-133 <br />0 <br />30 <br />99 <br />101 <br />73-123 <br />2 <br />30 <br />99 <br />98 <br />69-118 <br />0 <br />30 <br />73 <br />72 <br />51-148 <br />2 <br />30 <br />114 <br />112 <br />78-134 <br />2 <br />30 <br />109 <br />108 <br />73-136 <br />1 <br />30 <br />110 <br />108 <br />83-127 <br />1 <br />30 <br />98 <br />97 <br />78-120 <br />2 <br />30 <br />110 <br />107 <br />82-134 <br />2 <br />30 <br />111 <br />109 <br />82-130 <br />1 <br />30 <br />Surrogate Quality Control <br />*- Outside of specification <br />(1) The result for one or bath determinations was less than five times the LOQ. <br />a The background result was more than four times the spike added. <br />C I <br />Lancaster Laboratories, Inc. <br />M 8 M B E R 2425 New Holland Pike <br />Box 12425 <br />Lancaster, PA 17605.2425 <br />717-656-2300 Fax. 717-656-2681 <br />Long RPD <br />30 <br />2216 Rev. 10/2/02 <br />Dup <br />RPD <br />M-6- <br />