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Lancaster <br />• Laboratories REPRINT <br />Quality Control Summary <br />Client Name ChevronTexaco Group Number 833534 <br />Reported 01/02/03 at 03 52 PM <br />Laboratory Compliance Quality Control <br />Analysis Name <br />Batch number 02343A16A <br />TPH-GRO - waters <br />Batch number 023460023A <br />Methanol (by Direct Infection) <br />Batch number N023441AA <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 />2-Dibromoethane <br />y,benzene <br />lens (Total) <br />Batch number N023442AA <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 <br />Batch number 02343A16A <br />TPH-GRO - Waters <br />Blank Blank Report LCs <br />Result MDL Units $REC <br />Sample number(s) 3955354-3955358 <br />N D 50 ug/l 108 <br />Sample number(s) 3955354-3955357 <br />N D 200 ug/l 92 <br />Sample number(s) 3955354 <br />N D 50 ug/1 95 <br />N D 5 ug/l 96 <br />N D 5 u9/1 94 <br />N D 5 ug/l 104 <br />N D 5 ug/1 99 <br />N ❑ 5 ug/l 113 <br />N D 5 ug/1 106 <br />N D 5 ug/l 94 <br />N D 5 ug/l 103 <br />N D 5 ug/l 105 <br />N D 5 ug/l 101 <br />N D 5 u9/1 105 <br />Sample number(s) 3955355-3955358 <br />N D 50 ug/l 80 <br />N D 5 ug/l 91 <br />N D 5 ug/1 86 <br />N D 5 ug/l 99 <br />N D 5 ug/l 93 <br />N D 5 ug/1 109 <br />N D 5 ug/l 101 <br />N D 5 ug/l 93 <br />N D 5 ug/l 102 <br />N D 5 ug/l 106 <br />N D 5 ug/l 100 <br />N D 5 ug/1 103 <br />LCSD LCS/LCSD <br />%REC Limits <br />116 74-116 <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 />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 />Sample Matrix Quality Control <br />MS MSD MS/MSD RPD BKG DUP <br />%REC %REC Limits RPD MAX Conc Conc <br />Sample number(s) 3955354-3955358 <br />114 122 74-132 7 30 <br />*- Outside of specification <br />(1) The result for one or both determinations was less than five times the LOQ <br />46 The background result was more than four times the spike added <br />Page 1 of 4 <br />RPD RPD Max <br />7 30 <br />DUP <br />RPD <br />Dup <br />RPD <br />Max <br />Lancaster Laboratortes, Inc <br />MEMBER 2425 New Holland Pike <br />®PO Box 12425 <br />Lancaster, PA 17605 2425 <br />717 656-2300 Fax 717-656-2681 2216 Rev 1012/02 <br />