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Pal <br /> Lancaster Laboratories <br /> a Where quabty rs a science • <br /> Page l of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 829388 <br /> Reported 11/12%02 at 12 56 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LC9 LCSD LCS/LCSD <br /> Analysis Name Result ASL Units 96REC &&E-9 Limits RFID RPD M <br /> Batch number 02309A53B Sample number(s) 3933616-3933619 <br /> TPH-GRO - Waters N D 5o u9/1 104 108 74-116 4 30 <br /> Batch number N023051AB Sample number(s) 3933616,3933618 <br /> Methyl t-butyl ether N D 5 ug/l 100 77-127 <br /> Benzene N D 5 ug/l 106 85-117 <br /> Toluene N D 5 ug/l 109 85-115 <br /> Ethylbenzene N D 5 ug/l 109 82-119 <br /> Xylene (Total) N D 5 ug/1 110 84-120 <br /> Batch number N023102AA Sample number(s) 3933617 <br /> Methyl t-butyl ether N D 5 ug/1 93 77-127 <br /> Benzene N D 5 ug/1 104 85-117 <br /> Toluene N D 5 ug/1 106 85-115 <br /> Ethylbenzene N D 5 ug/1 107 82-119 <br /> Xylene (Total) N D 5 ug/1 108 84-120 <br /> Batch number N023111AA Sample number(s) 3933619 <br /> Methyl t-butyl ether N D 5 ug/l 95 77-127 <br /> Benzene N ❑ 5 ug/1 106 85-117 <br /> Toluene N D 5 ug/l 109 85-115 • <br /> Ethylbenzene N D 5 ug/l 106 82-119 <br /> Xylene (Total) N D 5 ug/1 109 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD- RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name %REc %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 02309A53B Sample number(s) 3933616-3933619 <br /> TPH-GRO - Waters 106 74-132 <br /> Batch number -11023051AB Sample number(s) 3933616,3933618 <br /> Methyl t-butyl ether 98 99 69-134 1 30 <br /> Benzene 112 113 78-134 0 30 <br /> Toluene 115 115 83-127 0 30 <br /> Ethylbenzene 115 117 82-134 1 30 <br /> Xylene (Total) 115 116 82-130 1 30 <br /> Batch number N023102AA Sample number(s) 3933617 <br /> Methyl t-butyl ether 94 94 69-134 1 30 <br /> Benzene -- - — - 111- - 110-- 78-134 - 1 30 <br /> Toluene 114 112 83-127 1 30 <br /> Ethylbenzene 113 113 82-134 0 30 <br /> Xylene (Total) 114 112 82-130 2 30 <br /> Batch number N023111AA Sample number(s) 3933619 <br /> Methyl t-butyl ether 95 97 69-134 2 30 <br /> Benzene 110 111 78-134 1 30 <br /> Toluene 114 112 83-127 1 30 <br /> Ethylbenzene 112 114 82-134 2 30 <br /> Xylene (Total) 113 114 82-130 1 30 <br /> *- Outside of specification <br /> (1) 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 /> Lancaster Laboratories Inc <br /> M B M B B R 2425 New Holland Pike <br /> PO Box 12425 <br /> Lancaster PG 17605 2425 <br /> 717 656 2300 Fax 717 656 2661 2216 Rev 9111/00 <br />