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i <br /> Lancaster , ' <br /> . Laboratories ( i4 n a l ys►s Report <br /> 2425 New Holland Pika+Pd Box 12425 Lancaster PA 17605-2425•717 656 2300 Fax 717-656-2681•www lancasterlabs corn <br /> Page 1 of 4 <br /> REVISED <br /> Quality%'Control Summary <br /> Client Name ChevronTexaco Group Number 953426 <br /> Reported 09/27/05 at a2 12 PM <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> _ submitted In these situdtions, to demonstrate precision and accuracy at <br /> a batch level, a LCS/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 NDL Units 96REC %RRC Limits RPD RPD Max <br /> � k <br /> Batch number 052140009A Sample number(s) 4573964-4573971 <br /> TPH-DRO CALUFT(Waters) N D 50 ug/l 89 90 64-125 j 20 <br /> Batch number 05214A16A Sample number(S) 4573963-4573972 <br /> TPH-GRO --Waters N D - 50 ug/l 99 - 98 70-130 1 30 <br /> Batch number 05215112601A Sample number(s) 4573972 <br /> TRPH 418 1 N D 0 40 mg/l 81 80 54-113 2 14 <br /> Batch number OS2160034A Sample number(s) 4573968-4573971 • <br /> Methanol (by Direct Infection) N D 200 u9/1 88 80-120 <br /> Batch number W052161AB Sample number(s} 4573963-4573966 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/l 104 77-127 <br /> Benzene N D 0 5 ug/l 101 85-117 <br /> Toluene N D 0 5 ug/l 97 85-115 <br /> Ethylbenzene N D 0 5 ug/l 101 82-119 <br /> _ Xylene (Total) - _ _ _ _ N D _ 0 5 = ug/l 100 _ _ 83-113 <br /> Batch number W052172AA Sample number(s) 4573967 <br /> Methy> Tertiary Butyl Ether N D 0 5 u9/1 92 77-127 <br /> Benzene N D 0 5 ug/l 93 85-117 <br /> Toluene N D 0 5 ug/l 97 85-115 <br /> Ethylbenzene N D 0 5 ug/l 100 82-119 <br /> Xylene (Total) N D 0 5 ug/l 99 83-113 <br /> Batch number Z052181AA Sample number(s) 4573968-4573971 " <br /> Ethanol N D 50 1.)9/1 99 30-155 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/i 89 77-127 <br /> di-Isopropyl ether N D 0 5 ug/l 89 67-130 <br /> Ethyl t-butyl ether N D 0 5 ug/l 89 74-120 <br /> t-Amyl methyl ether N D 0 5 ug/1 87 79-113 <br /> t-Butyl alcohol N D 5 ug/l 105 57-141 <br /> Benzene _ _ N D 0 5 ug/l 92 85-117 <br /> 1,2-Dichlorcethane N D 0 5 ug/l 90 77-132 <br /> Toluene N D 0 5 ug/l 93 85-115 <br /> 1,2-Dibromoethane N D 0 5 ug/l 92 81-114 <br /> Ethylbenzene N D 0 5 ug/l 94 82-119 <br /> Xylene (Total) N D 0 5 ug/l 97 83-113 <br /> Batch number Z052182AA Sample numbers) 4573972 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/l 89 77-127 <br /> Benzene N D 0 5 ug/l 93 85-117 <br /> Toluene N D 0 5 u9/1 92 85-115 <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 />