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1 <br />Lancaster <br />i Laboratories <br />i <br />Quality Control Summary <br />' Client Name ChevroaTexaco Group Number 840483 <br />Reported 02/20/03 at 02 30 PM <br />Laboratory Compliance Quality Control <br />' Blank Blank Report LCS LCSD LCS/LCSD <br />Analysis_Hame Result NDL Units %REC %REC Limits <br />' Batch number 03037A55A Sample numbers) 3990504-3990507 <br />TPH-GRO - Waters N D 50 ug/l 105 103 70-130 <br />Batch number 030430017A sample number(s) 3990504-3990507 <br />Methanol (by Direct Injection) N D 200 ug/1 88 64-130 <br />' Batch number P030401AA Sample number(s) 3990504-3990507 <br />Ethanol N D 50 u9/1 83 43-159 <br />Methyl Tertiary Butyl Ether N D 5 ug/l 108 77-127 <br />di -Isopropyl ether N D 5 ug/l 94 74-125 <br />' Ethyl t -butyl ether N D 5 ug/l 99 74-120 <br />t -Amyl methyl ether N D 5 ug/1 103 79-113 <br />t -Butyl alcohol N D 5 ug/1 106 53-147 <br />Benzene N D 5 ug/l 106 85-117 <br />1,2-Dichloroethane N D 5 ug/l 108 77-232 <br />Toluene N D 5 ug/l 103 85-115 <br />1,2-Dibromoethane N D 5 ug/1 105 81-114 <br />Ethylbenzene N D 5 ug/l 102 82-119 <br />Xylene (Total) N D 5 ug/l 106 84-120 <br />number P030441AA Sample number(s) 3990508 <br />,*,tch <br />hyl Tertiary Butyl Ether N D 5 ug/l 110 10B 77-127 <br />nzene N D 5 ug/1 105 107 85-117 <br />Toluene N D 5 ug/l 100 105 85-115 <br />Ethylbenzene N D 5 ug/l 102 105 82-119 <br />Xylene (Total) N D 5 ug/l 104 108 84-120 <br />Analysis Name <br />Batch number 03037A55A <br />TPH-GRO - Waters <br />Batch number 030430017A <br />Methanol (by Direct Injection) <br />Batch number P030401AA <br />Ethanol <br />Methyl Tertiary 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-Dmchloroethane <br />Toluene <br />1,2-Dibromoethane <br />Ethylbenzene <br />Xylene (Total) <br />Sample Matrix Quality Control <br />MS <br />MSD <br />MS/MSD <br />2425 New Holland Pike <br />PO Box 12425 <br />Lancaster PA 17605-2425 <br />RPA <br />%REC <br />$REC <br />Limits <br />RPD <br />MAX <br />Sample <br />number(s) 3990504-3990507 <br />118 <br />RPD <br />70-130 <br />Sample <br />number(s) <br />3990504-3990507 <br />88 <br />88 <br />69-127 <br />0 <br />20 <br />Sample <br />number(s) 3990504-3990507 <br />99 <br />85 <br />34-163 <br />15 <br />30 <br />109 <br />107 <br />69-134 <br />1 <br />30 <br />95 <br />94 <br />75-130 <br />1 <br />30 <br />100 <br />98 <br />73-123 <br />2 <br />30 <br />107 <br />108 <br />77-117 <br />0 <br />30 <br />109 <br />104 <br />39-155 <br />5 <br />30 <br />113 <br />110 <br />83-128 <br />2 <br />30 <br />110 <br />106 <br />73-136 <br />4 <br />30 <br />110 <br />107 <br />83-127 <br />3 <br />30 <br />107 <br />106 <br />78-120 <br />1 <br />30 <br />110 <br />108 <br />82-134 <br />2 <br />30 <br />111 <br />109 <br />82-130 <br />2 <br />30 <br />*- Outside of specification <br />The result for one or both determinations was less than five times the LOQ <br />The background result was more than four times the spike added <br />BKG DUP <br />Conc Cone <br />2 <br />Page 1 of 3 <br />RPD RPD Max <br />30 <br />2 <br />Lancaster Laboratories, Inc. <br />' M EMBER <br />2425 New Holland Pike <br />PO Box 12425 <br />Lancaster PA 17605-2425 <br />4 <br />717-656-2300 Fax 717-656-2681 <br />BKG DUP <br />Conc Cone <br />2 <br />Page 1 of 3 <br />RPD RPD Max <br />30 <br />2 <br />30 <br />2 <br />30 <br />4 <br />30 <br />3 <br />30 <br />3 <br />30 <br />DUP <br />DUP <br />RPD <br />RPD Max <br />2216 Rev 10/2/02 <br />