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Lancaster Laboratories Pagel of3 <br />i whouqlab;Vaol Summary <br />Client Name ChevronTexaco Group Number 820956 <br />Reported 09/11/02 at 06 20 PM <br />Laboratory Compliance Quality Control <br />Blank Blank Report LCS LCSD LCS/LCSD <br />Analysis Name Result MDL Unita %REC %REC Lamits RPD RPD Max <br />Batch number 0224GA56A Sample number(s) 3888953-3888958 <br />TPH-GRO _ Waters N D So ug/l 91 87 74-116 4 30 <br />Batch number 022480008A Sample number(s) 3888953-3888957 <br />Methanol (by Direct Injection) N D 200 ug/l 89 64-130 <br />Batch number N022471AA Sample number(s) 3888953--3888957 <br />Ethanol N D 50 ug/l 103 43-159 <br />Methyl t -butyl ether N D 5 ug/l 100 77-127 <br />di -Isopropyl ether N D 5 u9/1 110 74-125 <br />Ethyl t -butyl ether N D 5 ug/1 91 74-120 <br />t -Amyl methyl ether N D 5 u9/1 92 71-114 <br />t -Butyl alcohol N D 5 ug/l 88 59-139 <br />Benzene N D 5 ug/1 103 85-117 <br />1 2-Dichloroethane N D 5 ug/l 99 77-132 <br />Toluene N D 5 ug/l 103 65-115 <br />1,2-Dlbromoethane N D 5 ug/1 94 81-114 <br />Ethylbenzene N D 5 ug/1 102 82-119 <br />Xylene (Total) N D 5 ug/l 103 84-120 <br />• <br />Analysis Name <br />Batch number 0224GA56A <br />TPH-GRO - Waters <br />Batch number 022480008A <br />Methanol (by Direct Injection) <br />Batch number N022471AA <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 />Sample Matrix Quality Control <br />MS <br />MSD <br />MS/MSD <br />RPD BKG <br />%RPSC <br />%REC <br />Limits <br />RPD <br />MAX Conc <br />Sample <br />number(s) 3888953-3888958 <br />95 <br />95 <br />74-132 <br />0 <br />30 <br />Sample <br />number(s) <br />3888953-3888957 <br />93 <br />96 <br />69-127 <br />4 <br />20 <br />Sample <br />number(s) <br />3888953-3888957 <br />96 <br />101 <br />34-163 <br />5 <br />30 <br />90 <br />96 <br />69-134 <br />5 <br />30 <br />106 <br />109 <br />68-133 <br />4 <br />30 <br />90 <br />96 <br />73-123 <br />6 <br />30 <br />91 <br />96 <br />69-118 <br />5 <br />30 <br />94 <br />101 <br />51-148 <br />7 <br />30 <br />105 <br />108 <br />78-134 <br />3 <br />30 <br />99 <br />101 <br />73-136 <br />2 <br />30 <br />106 <br />109 <br />83-127 <br />3 <br />30 <br />91 <br />95 <br />78-120 <br />5 <br />30 <br />105 <br />108 <br />82-134 <br />3 <br />30 <br />106 <br />109 <br />82-130 <br />3 <br />30 <br />*- Outside of specification <br />(1) The result for one or both determinations was less than five times the LOQ <br />0"he <br />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 />Pb Bax 12425 <br />VAM Lancaster PA 17605 2425 <br />717 656 2300 Fax 717 656 2681 <br />DUP DUP Dup <br />RPD <br />Conc RPD Max <br />2216 Rev 9/11/00 <br />