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Lancaster <br /> i Laboratories Analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancaster.PA 17605-2425-717-656-2300 Fax:717-656-2681•www.[ancasterlabs.com <br /> Page I of 3 <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 891737 <br /> Reported: 04/22/04 at 05:04 PM <br /> Matrix QC may not he reported if site-specific QC samples were not <br /> submitted. In these situations,to demonstrate precision and accuracy at <br /> a batch level,a LC5/LCSD was performed,unless otherwise specified in the <br /> method. <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Unita 3sREC RHC Limits RPD RPD Max <br /> Batch number: 041030014A Sample number(s) : 4252531-4252532 <br /> Total TPH N.D. 40. ug/l 92 93 43-119 1 20 <br /> TPH Motor Oil C16-C36 N.D. 40. ug/l <br /> Batch number: 041040002A Sample number(s) : 4252531-4252532 <br /> TPH - DRO CA LL7FT (Waters) N.D. 50. ug/l 74 78 61-126 5 20 <br /> Batch number: 04106AQBB Sample number(s) : 4252531-4252532 <br /> TPH-GRO - Waters N.D. 50, ug/l 97 124 70-130 24 30 <br /> Batch numher; P041102AA Sample number(s) : 4252531-4252532 <br /> Methyl Tertiary Butyl Ether N.D. 0.5 ug/l 97 77-127 <br /> di-Isopropyl ether N.D. 0.5 ug/l 93 67-130 <br /> Ethyl t-butyl ether N.D. 0.5 u9/1 96 74-120 <br /> t-Amyl methyl ether N.D. 0.5 ug/l 99 79-113 <br /> t-Butyl alcohol N.D. 5. ug/1 96 57-141 <br /> Benzene N.D. 0.5 ug/l 99 85-117 <br /> 1,2-Dichloroethane N.D. 0.5 ug/l 95 77-132 <br /> Toluene N.D. 0.5 ug/l 101 85-115 <br /> 1,2-Dibromoethane N.D. 0.5 ug/l 96 81-114 <br /> Ethylbenzene N.D. 0.5 ug/l 102 82-119 <br /> Xylene (Total) N.D. 0.5 ug/l 103 84-120 <br /> Sample Matrix Quality Control <br /> NS MSA MS/NSD RPD BKG DUP DUP Dup RPD <br /> Analysis Name JREC %REC Limits RPD MAX Conc Conc RPD Ma; <br /> Batch number: 04106A08B Sample number(s) : 4252531-4252532 <br /> TPH-GRO - Waters 126 63-154 <br /> Batch number: P041102AA Sample number(s) : 4252531-4252532 <br /> Methyl Tertiary Butyl Ether 131 118 69-134 6 30 <br /> di-Isopropyl ether 100 103 75-130 3 30 <br /> Ethyl t-butyl ether 104 108 78-119 4 30 <br /> t-Amyl methyl ether 110 111 77-117 1 30 <br /> t-Butyl alcohol 100 108 51-147 8 30 <br /> Benzene 108 113 83-126 5 30 <br /> 1,2-Dichloroethane 100 104 73-136 4 30 <br /> Toluene 111 115 83-127 4 30 <br /> 1,2-Dibromoethane 99 107 78-120 7 30 <br /> Ethylbenzene 110 114 82-129 4 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 />