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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425 717 656 2300 Fax 717-65&2681•www lancasterlabs cum <br /> Page 1 of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 889098 <br /> Reported 03/30/04 at 10 21 PM <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 in the <br /> method <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Unita %RHC %RBC Limits RPD RPD Max <br /> Batch number 040830025A Sample number(s) 4239093-4239095 <br /> Methanol (by Direct In)ectlon) N D 200 ug/l 100 76-119 <br /> Batch number 04083A16A Sample number(s) 4239093-4239095 <br /> TPH-GRO - Waters N D 50 ug/l 102 110 70-130 7 30 <br /> Batch number P040861AA Sample number(s) 4239093-4239095 <br /> Ethanol N D 50 ug/l 93 46-145 <br /> Methyl Tertiary Butyl Ether N D 0 5 ug/1 94 77-127 <br /> dr-Isopropyl ether N D 0 5 ug/l 89 67-130 <br /> Ethyl t-butyl ether N D 0 5 ug/l 91 74-120 <br /> t-Amyl methyl ether N ❑ 0 5 u9/1 95 79-113 <br /> t-Butyl alcohol N D 5 ug/1 98 57-141 <br /> Benzene N D 0 5 ug/l 93 85-117 <br /> 1 2-Dichloroethane N D 0 5 ug/l 90 77-132 <br /> Toluene N D 0 5 ug/l 90 85-115 <br /> 1 2-Dlbromoethane N D 0 5 ug/1 92 81-114 <br /> Ethylbenzene N D 0 5 ug/1 92 82-119 <br /> Xylene {Total} N D 0 5 ug/1 92 84-120 <br /> Batch number P040871AA Sample number(s) 4239093 <br /> Ethanol N D 50 ug/1 93 46-145 <br /> di-Isopropyl ether N D 0 5 ug/1 93 67-130 <br /> Ethyl t-butyl ether N D 0 5 ug/1 95 74-120 <br /> t-Amyl methyl ether N D 0 5 ug/1 98 79-113 <br /> t-Butyl alcohol N D 5 ug/1 98 57-141 <br /> Benzene N D 0 5 ug/1 99 85-117 <br /> 1 2-Dlchloroethane N D 0 5 ug/l 95 77-132 <br /> Toluene N D 0 5 ug/l 96 85-115 <br /> 1 2-Dlbromoethane N D 0 5 ug/l 97 81-114 <br /> Ethylbenzene N D 0 5 ug/l 98 82-119 <br /> Xylene (Total) N D 0 5 ug/1 99 64-120 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD EKG DUP DUP Dup <br /> RPD <br /> Anal %REC %REC Limits RPD MAX Cone Conc RPD Max <br /> Batch number 040830025A Sample number(s) 4239093-4239095 <br /> Methanol (by Direct Infection) 100 96 72-122 4 20 <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 />