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Lancaster <br /> Laboratories Analyses Report <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425 717 656 2300 Fax 717 656 2681•www IancaSterlabs corn <br /> Page 1 of 2 <br /> REPRINT <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 881164 <br /> Reported 07/09/04 at 07 52 PM <br /> Laboratory Compliance Quality Control <br /> Blank Blank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL IInitaRSC $REC Limits RPD RPD Max <br /> Batch number 033500009A Sample number(s) 4197927-4197930 <br /> TPH - DRO CA LUFT (Soils) N D 10 mg/kg 80 108 56-118 29* 20 <br /> Batch number 03352A31A Sample number(s) 4197927-4197930 <br /> TPH-GRO - Soils N D 1 0 mg/kg 89 62-128 <br /> Batch number 040155708001 Sample number(s) 4197927-4197930 <br /> Lead N D 0 790 mg/kg 96 86-109 <br /> Batch number D033501AB Sample number{s) 4197927-4197930 <br /> Methyl Tertiary Butyl Ether N D 1 ug/kg 108 75-125 <br /> di-Isopropyl ether N D 1 ug/kg 109 70-129 <br /> Ethyl t-butyl ether N D 1 ug/kg 107 71-124 <br /> t-Amyl methyl ether N D 1 ug/kg 110 74-117 <br /> t-Butyl alcohol N D 20 ug/kg 118 42-164 <br /> Benzene N D 1 ug/kg 112 83-118 <br /> 1 2-Dichloroethane N D 1 ug/kg 108 76-126 <br /> Toluene N D 1 ug/kg 103 81-116 <br /> 1,2-Dibromoethane N D 1 ug/kg 103 77-114 <br /> Ethylbenzene N D 1 ug/kg 103 82-115 <br /> Xylene (Total) N D 1 ug/kg 103 82-117 <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSA RPD BKO DUP DUP Dup RPD <br /> Analysis Name $RHC %R8C Limits RPD MAX Conc Cone RPD Max <br /> Batch number 03352A31A Sample number(s) 4197927-4197930 <br /> TPH-GRO - Soils 6B 67 39-116 1 30 <br /> Batch number 040155708001 Sample number(s) 4197927-4197930 <br /> Lead 99 99 75-125 0 20 3 27 3 47 6 (1) 20 <br /> Batch number D033501AS Sample number(s) 4197927-4197930 <br /> Methyl Tertiary Butyl Ether (2) (2) 57-136 2 30 <br /> di-Isopropyl ether 99 102 55-132 2 30 <br /> Ethyl t-butyl ether 98 99 58-127 1 30 <br /> t-Amyl methyl ether 120 121 58-126 0 30 <br /> t-Butyl alcohol (2) (2) 20-174 1 30 <br /> Benzene (2) (2) 52-141 6 30 <br /> 1,2-Dachloroethane 130 134 57-137 3 30 <br /> Toluene 82 89 53-137 6 30 <br /> 1,2-Dzbromoethane 96 95 61-125 1 30 <br /> Ethylbenzene 3B* 81 50-136 20 30 <br /> Xylene (Total) 72 89 47-139 12 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 />