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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike Pal Bax 12425 Lancasler PA 17605-2425•717 656-2300 Fax 717-656.2661 www Iancasterlab&cOm <br /> Page I of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco c/o Cambria Group Number 965815 <br /> Reported 11/15/05 at 11 19 AM <br /> Matrix QC may not be reported if site-specific 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 DML Units 94REC %RBC Limits RPD RPD Max <br /> Batch number 05308AOBA Sample number(s) 4638650-4638652 <br /> TPH-GRO - Waters N D 50 ug/1 114 114 70-130 1 30 <br /> Batch number 05308AOBB Sample number(s) 4638653 <br /> TPH-GRO - Waters N D 50 u9/1 114 114 70-130 1 30 <br /> Batch number 053130003A Sample number(s) 4638651-4638653 <br /> Methanol (by Direct Infection) N D 200 ug/l 100 80-120 <br /> Batch number ZG53112AA Sample number(s) 4638650 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/1 89 77-127 <br /> Benzene N D 0 5 ug/1 65 85-117 <br /> Toluene N D 0 5 ug/1 87 85-115 <br /> Ethylbenzene N D 0 5 ug/l 85 82-119 <br /> Xylene (Total) N D 0 5 ug/1 90 83-113 <br /> Batch number Z053113AA Sample number(s) 4638651-4638653 <br /> Ethanol N D 50 ug/l 108 30-155 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/l 99 77-127 <br /> di-Isopropyl ether N D 0 5 ug/l 81 67-130 <br /> Ethyl t-butyl ether N D 0 5 ug/1 85 74-120 <br /> t-Amyl methyl ether N D 0 5 ug/1 90 79-113 <br /> t-Butyl alcohol N D 5 ug/l 92 60-133 <br /> Benzene N D 0 5 ug/1 89 85-117 <br /> 1,2-Dichloroethane N D 0 5 ug/1 78 77-132 <br /> Toluene N D 0 5 ug/1 88 85-115 <br /> 1,2-Dibromoethane N D 0 5 ug/l 86 81-114 <br /> Ethylbenzene N D 0 5 ug/1 88 82-119 <br /> Xylene (Total) N D 0 5 ug/1 95 83-113 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKO DUP DUP Dup RPD <br /> Analysis Name $REC JRHC Limits RPD MAX Conc Conc RPD Max <br /> Batch number 0530SAOSA Sample number(a) 4638650-4638652 <br /> TPH-GRO - Waters 115 63-154 <br /> Batch number 0530BA08B Sample number(s) 4638653 <br /> TPH-GRO - Waters 115 63-154 <br /> Batch number 053130003A Sample numbers) 4638651-4638653 <br /> *-Outside ofspecification <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 />