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c <br />1 Lancaster <br />Laboratories <br />Quality Control Summary <br />Client Namec ChevronTexaco <br />Reported: 06/30/03 at 12:23 AM <br />FAnalysis Name <br />s <br />Batch number: .P031781AA <br />Ethanol <br />Methyl Tertiary Butyl Ether <br />di -Isopropyl ether <br />Ethyl t -butyl ether <br />t -Amyl methyl ether <br />Ft -Butyl alcohol <br />- Benzene <br />1,2-Dichloroethane <br />Toluene <br />1,2-Dibromoeth,ane <br />Ethylbenzene <br />F, <br />Xylene (Total) <br />atch number: P031782AA <br />thanol <br />_.,ethyl Tertiary Butyl Ether <br />di -Isopropyl ether <br />Ethyl t -butyl ether <br />t- <br />1,2-Dichloroethane <br />Amyl methyl ether <br />Butyl alcohol <br />nzene <br />Toluene <br />1,2-Dibromoethane <br />Ethylbenzene <br />F Xylene (Total) <br />r <br />Analysis Name: TPH-GRO - Waters <br />Batch number: 03175A16A <br />Trifluorotoluene-F <br />4069283 <br />108 <br />4069284 <br />11,0 <br />4069285 <br />109 <br />4069286 <br />108 <br />4069287 <br />109 <br />Blank <br />105 <br />LCS <br />13.0 <br />Y LCSD <br />11.1 <br />MS <br />11.2 <br />Group Number: 856727 <br />Sample Matrix Quality Control <br />MS MSD MS/MSD RPD BKG DUP <br />%REC %REC Limits RPD MAX Conc Conc <br />Sample number(s): 4069283 <br />106 <br />111 <br />34-163 <br />5 <br />30 <br />95 <br />95 <br />69-134 <br />1 <br />30 <br />99 <br />100 <br />75-130 <br />1 <br />30 <br />97 <br />98 <br />73-123 <br />0 <br />30 <br />97 <br />96 <br />77-117 <br />1 <br />30 <br />103 <br />104 <br />39-155 <br />2 <br />30 <br />101 <br />102 <br />83-128 <br />1 <br />30 <br />98 <br />100 <br />73-136 <br />2 <br />30 <br />106 <br />108 <br />63-127 <br />2 <br />30 <br />95 <br />99 <br />78-120 <br />4 <br />30 <br />98 <br />99 <br />82-134 <br />0 <br />30 <br />100 <br />99 <br />82-130 <br />1 <br />30 <br />Sample <br />number(s): 4069284-4069287 <br />121 <br />98 <br />34-163 <br />21 <br />30 <br />108 <br />104 <br />69-134 <br />2 <br />30 <br />112 <br />107 <br />75-130 <br />4 <br />30 <br />111 <br />109 <br />73-123 <br />2 <br />30 <br />107 <br />105 <br />77-117 <br />2 <br />30 <br />112 <br />103 <br />39-155 <br />8 <br />30 <br />113 <br />109 <br />83-128 <br />3 <br />30 <br />113 <br />105 <br />73-136 <br />7 <br />30 <br />109 <br />107 <br />83-127 <br />2 <br />30 <br />101 <br />100 <br />78-120 <br />2 <br />30 <br />108 <br />106 <br />82-134 <br />2 <br />30 <br />110 <br />107 <br />82-130 <br />3 <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 />F <br />Lancaster Laboratories, Inc. <br />M E: M B E R 2425 New Holland Pike <br />®PO box 1 <br />j� Lancasterr,, PA PA 17605-2425 <br />717-656-2300 Fax: 717-656-2681 <br />Page 2 of 3 <br />DUP Dup <br />RPD <br />RPD Max <br />77tf, Rev Irtnrn'4 <br />