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Lancaster <br /> r AnalysisLaboratories nalys�s Report <br /> 2425 New Holland Pike PO Bax 12425 Lancaster PA 17605-2425•717 656-2300 Fax 717-656 2681•www lancasterlabs com <br /> Page I of 5 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 903796 <br /> Reported 07/23/04 at 03 52 PM <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> submated In these situations, to demonstrate precaston and dc.Luracy at <br /> a batch level, a LCS/LCSD was performed,unless otherwise specified in the <br /> method <br /> Laboratory Compliance Qualxty Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Unxts %RBC %REC Limits RPD RPD Max <br /> Batch number 041970024A Sample number(s) 4311250-4311251 <br /> Methanol (by Direct In]ection) N D 1000 ug/l 100 76-119 <br /> Batch number 0419BA07A Sample numbers) 4311251 <br /> TPH-GRO - Waters N D 50 ug/l 101 100 70-130 1 30 <br /> Batch number 0419BA07B Sample number(s) 4311242 <br /> TPH-GRO - Waters N D 50 ug/l 101 100 70-130 1 30 <br /> Batch number 0419BA07C Sample riumber(s) 4311243,4311245-4311247,4311249-4311250 <br /> TPH-GRO - Waters N D 5o ug/1 101 100 70-130 1 30 <br /> Batch number 0419BA07D Sample number(s) 4311244,4311248 <br /> TPH-GRO - Waters N D 50 ug/l 101 100 70-130 1 30 <br /> Batch number P042012AA Sample number(s) 4311242-4311249 <br /> Methyl Tertiary Butyl Ether N D 2 ug/1 108 77-127 <br /> Benzene N D 5 ug/l 108 85-117 <br /> Toluene N D 5 u9/1 109 85-115 <br /> Ethylbenzene N D 5 u9/1 110 82-119 <br /> Xylene (Total) N D 5 ug/l 108 84-120 <br /> Batch number Z042011AA Sample number(s) 4311251 <br /> Ethanol N D 500 ug/l 107 46-145 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 112 77-127 <br /> di-Isopropyl ether N D 2 ug/l 119 67-130 <br /> Ethyl t-butyl ether N D 2 ug/l 106 74-120 <br /> t-Amyl methyl ether N D 2 ug/l 97 79-113 <br /> t-Butyl. alcohol N D 100 ug/l 94 57-141 <br /> Benzene N D 5 ug/l 102 85-117 <br /> 1,2-Dichleroethane N D 2 ug/l 105 77-132 <br /> Toluene N D 5 u9/1 100 85-115 <br /> 1,2-Dlbromoethane N D 2 ug/l 105 81-114 <br /> Ethylbenzene N D 5 ug/l 99 82-119 <br /> Xylene (Total) N D 5 ug/l 96 84-120 <br /> Batch number Z042031AA Sample number(s) 4311250 <br /> Ethanol N D 500 ug/l 101 46-145 <br /> Methyl Tertiary Butyl Ether N D 2 ug/l 112 77-127 <br /> di-Isopropyl ether N D 2 ug/l 120 67-130 <br /> Ethyl t-butyl ether N D 2 ug/l 107 74-120 <br /> t-Amyl methyl ether N D 2 ug/l 97 79-113 <br /> t-Butyl alcohol N D 100 ug/l 95 57-141 <br /> Benzene N D 5 ug/1 103 85-117 <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 />