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Lancaster Laboratories Page I of <br /> Where qualityis a science. <br />' Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 810519 <br />' Reported: 06/20/02 at 08:22 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br />' Analvsis Name Result 6®L Units %RBC %REC Limits RPD RPD Max <br /> Batch number: 02161A56A Sample number(s) : 3832619-3832626 <br /> TPH-GRO - Waters N.D- 50. ug/l 93 90 76-126 3 30 <br /> Batch number: 021620005A Sample number(s) : 3832619-3832625 <br /> TPH - DRO CA LUFT (Waters) N.D. 50. ug/1 66 87 54-120 28* 20 <br /> Batch number: 02162oo06A Sample number(s) : 3832619-3632625 <br /> Total TPH N.D- 200. ug/l 89 92 60-120 3 20 <br /> TPH Motor Oil C16-C36 N.D. 1000. ug/1 <br />' Batch number: 021620012A Sample number(s) : 3832619-3832626 <br /> Methanol (by Direct Injection) N.D- 200. ug/1 96 64-130 <br /> Batch number: U021611AA Sample number(s) : 3832619-3832623 <br /> Ethanol N.D. 50. ug/1 116 44-139 <br /> Methyl t-butyl ether N.D. .5 ug/1 91 77-127 <br /> di-Isopropyl ether N.D. 5 ug/1 100 74-125 <br /> Ethyl t-butyl ether N.D. .5 ug/1 91 74-120 <br /> t-Amyl methyl ether N.D. 5 ug/1 90 71-114 <br /> t-Butyl alcohol N.D. 5. ug/1 87 59-139 <br /> Benzene N.D. .5 ug/l 98 84-120 <br /> 1,2-Dichloroethane N.D. .5 ug/1 108 77-132 <br /> Toluene N.D. .5 ug/1 104 86-123 <br /> 1,2-Dibromoethane N.D. S ug/1 100 84-119 <br /> I hylbenzene N-D. .5 ug/1 102 88-124 <br /> lene (Total) N.D. .5 ug/1 101 89-124 <br /> Batch number: U021611AB Sample number(s) : 3832623-3832626 <br /> Ethanol N.A. 50. ug/1 116 44-139 <br />' Methyl t-butyl ether N.D. .5 ug/l 91 77-127 <br /> di-Isopropyl ether N.D. .5 ug/1 100 74-125 <br /> Ethyl t-butyl ether N.D. .5 ug/1 91 74-120 <br /> t-Amyl methyl ether N.D. .5 ug/1 90 71-114 <br /> t-Butyl alcohol N.D. 5. ug/1 87 59-139 <br /> I Benzene N.D. .5 ug/1 98 84-120 <br /> 1,2-Dichloroethane N.D. .5 ug/1 108 77-132 <br /> Toluene N.D- .5 ug/1 104 86-123 <br /> 1,2-Dibromoethane N.D. .5 ug/1 100 84-119 <br /> Ethylbenzene N.D. .5 ug/l 102 88-124 <br /> Xylene (Total) N.D. .5 ug/1 101 89-124 <br /> Batch number: U021611AC Sample number(s) : 3832623-3832625 <br /> Benzene N.D. .5 ug/1 98 84-120 <br /> Toluene N.D. .5 ug/1 104 86-123 <br /> Xylene (Total) N.D. .5 ug/1 101 89-124 <br /> Sample Matrix Quality Control <br /> I MS MSD NS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name %RBC %R8C Limits RPD MAX Cone Cone RFD max <br /> Batch number: 0216IA56A Sample number(a) : 3832619-3832626 <br /> TPH-GRO - Waters 108 74-132 <br /> Batch number: 021620012A Sample number(s) : 3832619-3832626 <br /> Methanol (by Direct Injection) 100 96 58-137 4 20 <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 /> Lancaster Laboratories,tnc. <br /> I M E M B E R 2425 New Holland Pike <br /> PO Box 12425 <br /> Lancaster,PA 17605-2425 <br /> 717-656-2300 Fax:717-6S6-2681 2216 Rev.9111100 <br />