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OilLancasterAnalsis Re ort <br /> _ Laboratories Y p <br /> 2425 New Holland Pike PO Bon 12425 Lancasler PA 17605-2425 1717 658-2300 Fax 717-1556-26131www lanCasterlabs Com <br /> Page l of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 901486 <br /> Reported 07/08/04 at 03 31 PM <br /> Matrix QC may not be reported if site-specific QC samples were not <br /> submitted In these Situations,to demonstrate pieLision and dLLUIacy at <br /> a batch level,a LCS/LCSD was pt,rfoinit-d, 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 %REC %REC Limits RPD RPA Max <br /> Batch number 041BOA07C Sample number(s) 4300330-4300336 <br /> TPH-GRO - Waters N D 50 ug/l 105 108 70-130 3 30 <br /> Batch number 041BIA56A Sample number(s) 4300337-4300339 <br /> TPH-GRO - Waters N D 5o ug/l 106 110 70-130 4 30 <br /> Batch number P041824AA Sample number(s) 4300331-4300339 <br /> Methyl Tertiary Butyl Ether N ❑ 2 u9/1 102 77-127 <br /> di-Isopropyl ether N D 2 ug/1 99 67-130 <br /> vtthyl t-butyl ether N D 2 ug/l 101, 74-120 <br /> -Amyl methyl ether N D 2 ug/1 103 79-113 <br /> -Butyl alcohol N D 100 u9/1 103 57-141 <br /> Benzene N D 5 ug/1 101 85-117 <br /> 1,2-Dichloroethane N D 2 ug/l 101 77-132 <br /> Toluene N D 5 ug/1 101 85-115 <br /> 1,2-Dibromoethane N D 2 ug/l 98 81-114 <br /> Ethylbenzene N D 5 ug/l 101 82-119 <br /> Xylene (Total) N D 5 ug/l 101 84-120 <br /> Batch number P041832AA Sample number(s) 4300331 <br /> t-Butyl alcohol N D 100 ug/1 95 57-141 <br /> Batch number P041841AA Sample number(s) 4300330 <br /> Methyl Tertiary Butyl Ether N D 2 ug/1 100 77-127 <br /> Benzene N D 5 ug/1 102 85-117 <br /> Toluene N D 5 ug/1 99 85-115 <br /> Ethylbenzene N D 5 ug/l 101 82-119 <br /> Xylene (Total) N D 5 ug/l 101 84-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD EKG DUP DUP Dup RPD <br /> Analysis Name %IZEC %REC Limits RPD MAX Conc Conc RPD Maxim_ <br /> Batch number 0418OA07C Sample number(s) 4300330-4300336 <br /> TPH-GRO - Water$ 112 63-154 <br /> Batch number 0418IA56A Sample number(s) 4300337-4300339 <br /> TPH-GRO - Waters 118 114 63-154 1 30 <br /> Batch number P041824AA Sample numbers) 4300331-4300339 <br /> Methyl Tertiary Butyl Ether 109 124 69-134 7 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 />