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Lancaster Laboratories <br />Where quality is a science. <br />Quality Control Summary <br />Client Name: ChevronTexaco Group Number: 811668 <br />Reported: 06/28/02 at 12:41 PM <br />Laboratory Compliance Quality Control <br />Analysis Name <br />Batch number: 0217OA51A <br />TPH-GRO - Waters <br />Batch number: 021750002A <br />Methanol (by Direct Injection) <br />Batch number: U021701AB <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 />C) <br />Analysis Name <br />Batch number: 0217OA51A <br />TPH-GRO - Waters <br />Batch number: 021750002A <br />Methanol (by Direct Injection) <br />Batch number: U021701AB <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: 0217OA51A <br />Trifluorotoluene-F <br />3837550 94 <br />Blank 93 <br />Result <br />@IDL <br />Unita <br />%REC <br />%REC Limits <br />Sample <br />number(s): <br />3837550 <br />2 <br />30 <br />N.D. <br />50- <br />u9/1 <br />94 <br />101 76-126 <br />Sample <br />number(s): <br />3837550 <br />3 <br />30 <br />N -D- <br />200. <br />ug/l <br />92 <br />64-130 <br />Sample <br />number(s): <br />3837550-3637551 <br />1 <br />N.D. <br />50- <br />ug/l <br />75 <br />44-139 <br />N.D- <br />.5 <br />ug/l <br />106 <br />77-127 <br />N.D. <br />.5 <br />u9/1 <br />104 <br />74-125 <br />N.D. <br />.5 <br />ug/1 <br />99 <br />74-120 <br />N.D. <br />.5 <br />ug/1 <br />95 <br />71-114 <br />N.D. <br />5. <br />ug/1 <br />108 <br />59-139 <br />N.D- <br />.5 <br />ug/l <br />97 <br />84-120 <br />N -D- <br />.5 <br />ug/l <br />130 <br />77-132 <br />N.D- <br />.5 <br />ug/l <br />102 <br />86-123 <br />N -D- <br />.5 <br />ug/l <br />100 <br />84-119 <br />N -D. <br />.5 <br />ug/l <br />104 <br />88-124 <br />N.D. <br />.5 <br />ug/l <br />101 <br />89-124 <br />Sample Matrix Quality Control <br />M5 MSD MS/MSD RPD BXG <br />%REC %REC Limits RPD MAX Conc <br />Sample number(s): 3837550 <br />92 74-132 <br />Sample number(s): 3837550 <br />92 Be 58-137 4 20 <br />Sample number(s): 3837550-3837551 <br />107 <br />116 <br />70-130 <br />9 <br />30 <br />106 <br />108 <br />69-134 <br />2 <br />30 <br />109 <br />108 <br />68-133 <br />1 <br />30 <br />105 <br />102 <br />73-123 <br />3 <br />30 <br />96 <br />97 <br />69-118 <br />1 <br />30 <br />124 <br />123 <br />51-148 <br />1 <br />30 <br />106 <br />105 <br />78-134 <br />1 <br />30 <br />137 <br />137 <br />75-141 <br />0 <br />30 <br />107 <br />107 <br />78-133 <br />0 <br />30 <br />105 <br />105 <br />78-120 <br />1 <br />30 <br />110 <br />109 <br />82-134 <br />1 <br />30 <br />104 <br />107 <br />81-136 <br />2 <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 />,2) The background result was more than four times the spike added. <br />Lancaster Laboratories, Inc. <br />M E M B E R 2425 Now Holland Pike <br />®PO Box 12425 <br />Lancaster. PA 17605-2425 <br />717656-2300 Fax: 717-656-2681 <br />7 <br />Page 1 of 2 <br />RPD RPD Max <br />30 <br />DUP DUP Dup <br />RPD <br />Conc RPD Max <br />2216 Rev. 9/11/00 <br />