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Lancaster Laboratories : a <br />Where quality is a science. <br />Quality Control Summary'= , <br />Client Name: ChevronTexaco Group Number: 829283 <br />Reported: 11/14/02 at 07:58 PM <br />=L`, $ Sample Matrix Quality -Control <br />Analysis Name <br />Ethylbenzene <br />Xylene (Total) <br />Batch number: N0231oiAA <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-Dichlaroethane <br />Toluene <br />1,2-Dibromoethane <br />Ethylbenzene <br />Xylene (Total) <br />Batch number: N023101AB <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 />Batch number: N023102AA <br />Ethanol <br />Metbyl 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 />Ethy!+=zcnc <br />Xylene (Total) <br />Analysis Name: TPH-GRo - Waters <br />Batch number: 02308A16A <br />Trifluorotoluene-F <br />M3 <br />MSA <br />ME/MSD <br />RPD BKG' <br />%REC <br />ARRC <br />Limits <br />RPD <br />MAX COAs <br />115 <br />117 <br />.82-134 <br />1 <br />30 <br />115 <br />116 <br />82-130 <br />1 <br />30 <br />Sample <br />number(s): 3933154-3933159 <br />85 <br />84 <br />34=163 <br />1 <br />30 <br />98 <br />102 <br />69-134 <br />4 <br />30 <br />91 <br />94 <br />68-133 <br />.3 <br />30 <br />91 <br />94 <br />73-123 <br />4 <br />30 <br />95 <br />98 <br />69-118 <br />3 <br />30 <br />94 <br />101 <br />51-148 <br />8 <br />30 <br />109 <br />111 <br />78-134 <br />1 <br />30' <br />105 <br />108 <br />73-136 <br />K 2 <br />30 <br />114 <br />114 <br />83-127 <br />0 <br />30 <br />99 <br />100 <br />78-120 <br />1 <br />30 <br />(2) <br />(2) <br />62-134 <br />1 <br />30 <br />108 <br />111 <br />82-130 <br />2 <br />30 <br />Sample <br />number(s): <br />3933160-3933162 <br />85 <br />84 <br />34-163 <br />1 <br />30 <br />98 <br />102 F <br />69-134 <br />4 <br />30 <br />91 <br />94 <br />68=133 <br />3 <br />30 <br />91 <br />94 <br />73-123 <br />4 <br />30 <br />95 <br />98 <br />69-118 <br />3 <br />30 <br />94 <br />101 <br />51-148 <br />8 <br />30 <br />109 <br />113. <br />78-134 <br />1 <br />30 <br />105 <br />108 <br />73-136 <br />2 <br />30 <br />114 <br />114 <br />'83-127 <br />0 <br />30 <br />•99 <br />100 <br />78-120 <br />1 <br />30 <br />(2) <br />(2) <br />82-134 <br />1 <br />30 <br />108 <br />111 <br />82-130 <br />2" <br />30 <br />Sample <br />number(s): <br />3933143-3933153,3933163-3933165 <br />95 <br />96 <br />34-163 <br />1 <br />30 <br />94 <br />94 <br />69-134 <br />r <br />1 <br />30 <br />92 <br />92 <br />68-133 <br />0 <br />30 <br />86 <br />87 <br />73-123 <br />�2 <br />30 <br />88 <br />90 <br />69-118 <br />1 <br />30 <br />89 <br />91 <br />51-148 <br />2 <br />30 <br />ill <br />110 <br />78-134 <br />1 <br />30 <br />104 <br />104 <br />73-136 <br />0 <br />30 <br />114 <br />112 <br />63-127 <br />1 <br />30 <br />97 <br />ii2 <br />97 <br />2i7 <br />78-120 <br />o2 <br />0 <br />n <br />30 <br />2n <br />114 <br />112 <br />-12n <br />82-130 <br />2 <br />30 <br />Surrogate Quality Control <br />*- Outside of specification <br />(1) The result for one or both determinations was less than five times the LOQ. <br />(2) The background result was more than four times the spike added. <br />Lancaster Laboratories, Inc. <br />RA E PA B E Pj 2425 New Holland Pike <br />PO Box 12425 <br />Lancaster, PA 17605-2425 <br />717-656-2300 Fax:717-656-26x1 <br />DUP <br />Conc <br />Page 3 of 7 <br />DUP Dup <br />RPD <br />RPD Max <br />F <br />2216 Rev. 9/11/60 <br />