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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.717-656-2681•www.lancasterlabs.com <br /> Pagel of 2 <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 881164 <br /> Reported: 01/29/04 at 10 :21 AM <br /> Laboratory Compliance Quality Control <br /> BlankBlank Report LCS LCSD LCS/LCSD <br /> Analysis Name Result MDL Units %REC %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/MSD RPD BKG DUP DUP Dup— <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number: 03352A31A Sample number(s) : 4197927-4197930 <br /> TPH-GRO - Soils 68 67 39-118 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: D033501AB 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-Dichloroethane 130 134 57-137 3 30 <br /> Toluene 82 89 53-137 6 30 <br /> 1,2-Dibromoethane 96 95 61-125 1 30 <br /> Ethylbenzene 38* 81 50-136 20 30 <br /> Xylene (Total) 72 89 47-139 12 30 <br /> Surrogate Quality Control <br /> ' Analysis Name: TPH - DRO CA LUFT (Soils) <br /> *-Outside of specification <br /> (I) 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 />