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4 <br /> Lancaster <br /> . Laboratories Analysis Report <br /> 2425 New Holland Pike PO Boot 12425 Lancasler PA 176052425•717-656-2300 Fax 717-656-2681 www Iancasterlabs com <br /> Page 1 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 971036 <br /> Reported 12/23/05 at 09 40 AM <br /> Matrix QC may not be reported if site-spec lfie QC samples were not <br /> submitted In these situations,to demonstrate precision and accuracy at <br /> a batch level,a LCS/LCSD was performed,unless otherwise specified 1n the <br /> method <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result NDL Units %REC %RSC Lxmits RPD RPD Max <br /> Batch number 053490004A Sample number(s) 4669696-4669708 <br /> Coal Tar Oil N D 0 20 mg/l <br /> Gasoline N D 0 20 mg/l <br /> Kerosene N b 0 20 mg/1 <br /> Diesel/#2 Fuel N D 0 20 mg/l 99 91 57-115 8 20 <br /> Mineral Spirits N D 0 20 mg/l <br /> 46 Fuel Oil N D 1 0 mg/l <br /> Motor Oil N D 1 0 mg/l <br /> h number 0535OA16A Sample number(s) 4669695 <br /> GRO - Waters N D 50 ug/l 110 109 70-130 1 30 <br /> Batch number W053521AA Sample number(s) 4669695-4669697,4669699-4669705 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/l 100 77-127 <br /> Benzene N D 0 5 ug/l 101 85-117 <br /> Trichloroethene N D I ug/l 99 87-117 <br /> Toluene N D 0 5 ug/1 100 85-115 <br /> Tetrachloroethene N D 0 6 ug/l 101 74-125 <br /> Ethylbenzene N D 0 5 ug/1 101 82-119 <br /> Xylene (Total) N D 0 5 ug/l 101 83-113 <br /> Batch number W053521AB Sample number(s) 4669705-4669708 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/l 100 77-127 <br /> Benzene N D 0 5 u9/1 101 85-117 <br /> Trichloroethene N D 1 ug/l 99 87-117 <br /> Toluene N D 0 5 ug/l 100 85-115 <br /> Tetrachloroethene N D 0 8 ug/l 101 74-125 <br /> Ethylbenzene N D 0 S u9/1 101 82-119 <br /> Xylene (Total) N D 0 5 ug/l 101 83-113 <br /> Batch number W053521AC Sample number{s) 4669698 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/1 100 77-127 <br /> Benzene N D 0 5 u9/1 101 85-117 <br /> Trichloroethene N D 1 ug/1 99 67-117 <br /> Toluene N D 0 5 ug/1 100 85-115 <br /> Tetrachloroethene N D 0 8 ug/l 101 74-125 <br /> Ethylbenzene N D 0 5 ug/1 101 82-119 <br /> Xylene (Total) N D 0 5 ug/l 101 83-113 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG Dup DUP Dup RPD <br /> *-Outside of specification <br /> The result for one or both determinations was less than five times the LOQ <br /> The background result was more than four times the spike added <br />