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I <br />Lancaster Laboratories <br />Where qualityis a science. <br />Quality Control Sunmary <br />Client Name: ChevronTexaco Group Number: 824199 <br />Reported: 10/02/02 at 10:49 AM <br />Laboratory Compliance Quality Control <br />Batch number: N022691AB Sample number(s): 3905796-3905799 <br />thanpl <br />Blank <br />Blank <br />Report <br />LCS <br />LCSD LC8/LCSD <br />Analysis Name <br />Result <br />MDL <br />Units <br />%REC <br />%RBC Limits <br />Batch number: 022690013A <br />Sample <br />number(s): <br />3905795-3905799 <br />99 <br />74-125 <br />Methanol (by Direct Injection) <br />N.D. <br />200. <br />ug/l <br />93 <br />64-130 <br />Batch number: 02269ASIA <br />Sample <br />number(s): <br />3905795-3905799 <br />97 <br />71-114 <br />TPH-GRO - Waters <br />N.D. <br />50. <br />ug/l <br />97 <br />74-116 <br />Batch number: N022682AB <br />Sample <br />number(s): <br />3905795 <br />101 <br />85-117 <br />Ethanol <br />N.D_ <br />50. <br />ug/l <br />72 <br />43-159 <br />Methyl t -butyl ether <br />N.D. <br />.5 <br />ug/1 <br />94 <br />77-127 <br />di -Isopropyl ether <br />N.D. <br />.5 <br />ug/l <br />86 <br />74-125 <br />Ethyl t -butyl ether <br />N.D. <br />.5 <br />ug/l <br />84 <br />74-120 <br />t -Amyl methyl ether <br />N.D. <br />.5 <br />ug/1 <br />85 <br />71-114 <br />t -Butyl alcohol <br />N.D. <br />5. <br />ug/1 <br />80 <br />59-139 <br />Benzene <br />N.D. <br />.5 <br />ug/l <br />99 <br />85-117 <br />1,2-Dichloroethane <br />N.D. <br />.5 <br />ug/1 <br />101 <br />77-132 <br />Toluene <br />N.D. <br />.5 <br />ug/1 <br />101 <br />85-115 <br />1,2-Dibromoethane <br />N.D. <br />.5 <br />ug/l <br />85 <br />81-114 <br />Ethylbenzene <br />N.D. <br />.5 <br />ug/l <br />101 <br />82-119 <br />Xylene (Total) <br />N.D. <br />.5 <br />ug/l <br />97 <br />84-120 <br />Batch number: N022691AB Sample number(s): 3905796-3905799 <br />thanpl <br />N.D. <br />50. <br />ug/1 <br />59 <br />93-159 <br />thy l t -butyl ether <br />N.D. <br />.5 <br />ug/l <br />98 <br />77-127 <br />-Isopropyl ether <br />N.D. <br />.5 <br />ug/l <br />99 <br />74-125 <br />thyl t -butyl ether <br />N.D. <br />.5 <br />ug/1 <br />99 <br />74-120 <br />t -Amyl methyl ether <br />N.D. <br />.5 <br />ug/1 <br />97 <br />71-114 <br />t -Butyl alcohol <br />N.D. <br />5. <br />ug/1 <br />88 <br />59-139 <br />Benzene <br />N.D. <br />.5 <br />ug/1 <br />101 <br />85-117 <br />1,2-Dichloroethane <br />N.D. <br />.5 <br />u9/1 <br />99 <br />77-132 <br />Toluene <br />N.D. <br />.5 <br />ug/l <br />104 <br />85-115 <br />1,2-Dibromoethane <br />N.D. <br />.5 <br />ug/l <br />100 <br />81-114 <br />Ethylbenzene <br />N.D. <br />.5 <br />ug/1 <br />104 <br />82-119 <br />Xylene (Total) <br />N.D. <br />.5 <br />ug/l <br />107 <br />84-120 <br />Batch number: N022701AA <br />Sample <br />number(s): <br />3905800 <br />Methyl t -butyl ether <br />N.D. <br />.5 <br />ug/1 <br />97 <br />77-127 <br />Benzene <br />N.D. <br />.5 <br />ug/l <br />101 <br />85-117 <br />Toluene <br />N.D. <br />.5 <br />ug/l <br />100 <br />85-115 <br />Ethylbenzene <br />N.D. <br />.5 <br />ug/l <br />103 <br />82-119 <br />Xylene (Total) <br />N.D. <br />.5 <br />ug/1 <br />105 <br />84-120 <br />Sample: <br />Matrix <br />Quality <br />Control <br />lvsis Name <br />Batch number: 022690013A <br />Methanol (by Direct Injection) <br />Batch number: 02269A51A <br />TPH-GRO - Waters <br />Page 1 of 4 <br />RPD RPD Max <br />MS MSD MS/MSD RPD BKa DUP DUP <br />Dup <br />RPD <br />%RRC %REC Limits RPD MAX Conc Conc RPI) <br />Kax� <br />Sample number(s): 3905795-3905799 <br />96 100 69-127 4 20 <br />Sample number(s): 3905795-3905799 <br />100 103 74-132 3 30 <br />*- Outside of specification <br />(1) The result for one or both determinations was less than five times the LOQ. <br />4 ) 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 176OS-2425 <br />717-656-2300 Fax:717-656.2681 <br />2216 Rev. 9111/00 <br />