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OilLancasterAnal sis Report <br /> _ Laboratories Y <br /> 2425 New Holland Pike,PO Box 12425,LancaSler,PA 17605-2425•717.658-2300 Fax:717-656-2681•www.lancasterlabs.com <br /> Page 2 of 5 <br /> Quality Control Summary <br /> Client Name: ChevronT'exaco Group Number: 893483 <br /> Reported: 05/11/04 at 11:17 AM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Ana] sis Name Result MDL Unit %RBC %REC Limits RPD RPP Max <br /> Ethyl t-butyl ether N.A. 2. ug/1 94 74-1203 <br /> t-Amyl methyl ether N.D. 2. ug/1 100 57-141 <br /> 11 <br /> t-Butyl alcohol N.D. 100. ug/1 105 85-117 <br /> Benzene N.D. -5 ug/l 101 77-132 <br /> 1,2-Dichloroethane N.D. 2_ ug/l 93 <br /> Toluene N.D. _5 ug/l 94 85-115 <br /> 1,2-Aibromoethane N.D. 2. ug/1 95 81-114 <br /> Ethylbenzene N.D. .5 u9/1 95 82-119 <br /> Xylene (Total) N.D. .5 ug/1 97 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP Dup RPD <br /> _Analysis Name %REC %REC Limits RPD MAX Conc Cono APD Max <br /> Batch number: 0411SA07B Sample number(s) : 4261101-4261110 <br /> TPH-GRO - Waters 101 63-154 <br /> •Batch number: 0411BA07C Sample number(s) : 4261111-4261112 <br /> TPH-GRO - Waters 101 63-154 <br /> Batch number: 041200017A Sample number(s) : 4261102-4261108 <br /> Methanol (by Direct Injection) 96 102 72-122 74* 20 <br /> Batch number: 041250021A Sample number(s) : 4261109-4261112 <br /> Methanol (by Direct Injection) 93 93 72-122 0 20 <br /> Batch number: P041241AA Sample number(s) : 4261102-4261105 <br /> Ethanol 95 93 41-155 2 30 <br /> Methyl Tertiary Butyl Ether 97 98 69-134 1 30 <br /> di-Isopropyl ether 95 95 75-130 1 30 <br /> Ethyl t-butyl ether 94 95 78-119 1 30 <br /> t-Amyl methyl ether 99 101 77-117 2 30 <br /> t-Butyl alcohol 142 138 51-147 3 30 <br /> Benzene 102 103 83-128 1 30 <br /> 1,2-Dichloroethane 95 95 73-136 0 30 <br /> Toluene 99 99 83-127 1 30 <br /> 1,2-Dibromoethane 95 96 78-120 1 30 <br /> Ethylbenzene 99 100 82-129 1 30 <br /> Xylene (Total) 100 101 82-130 1 30 <br /> Batch number: P041242AA Sample number(s) : 4261101 <br /> Methyl Tertiary Butyl Ether 100 102 69-134 2 30 <br /> Benzene 104 105 83-126 2 30 <br /> Toluene 101 101 83-127 0 30 <br /> Ethylbenzene 102 97 82-129 5 30 <br /> Xylene (Total) 100 97 82-130 3 30 <br /> Batch number: P041251AA Sample number(s) : 4261106-4261112 <br /> Ethanol 108 106 41-155 2 30 <br /> Methyl Tertiary Butyl Ether 102 93 69-134 3 30 <br /> di-Isopropyl ether 99 90 75-130 9 30 <br /> Ethyl t-butyl ether 99 92 78-119 8 30 <br /> i <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 />