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LancasterAnalysis Report <br /> Laboratories <br /> Y <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425.717 656-2300 Fax 717-656-2681 www lancasterlabs com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 948110 <br /> Reported 06/29/05 at 11 08 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKO DUP DUP Dup RPD <br /> Analysis Name %REC %REC Limits RPD MAX Cone cont RPD Max <br /> Batch number 05173A51A Sample number(s) 4547133-4547144 <br /> TPH-GRO - Waters 121 63-154 <br /> Batch number Z051753AA Sample number(s) 4547134-4547144 <br /> Ethanol 106 112 26-153 4 30 <br /> Methyl Tertiary Butyl Ether 94 98 69-134 3 30 <br /> di-Isopropyl ether 94 97 75-130 3 30 <br /> Ethyl t-butyl ether 94 98 76-119 4 30 <br /> t-Amyl methyl ether 95 99 77-117 5 30 <br /> t-Butyl alcohol 95 101 51-147 7 30 <br /> Benzene 98 102 83-128 3 30 <br /> 112-Dichloroethane 95 98 73-136 3 30 <br /> Toluene 99 102 83-127 3 30 <br /> 1,2-Dibromoethane 93 95 78-120 3 30 <br /> Ethylbenzene 99 102 82-129 4 30 <br /> Xylene (Total) 98 102 82-130 4 30 <br /> Batch number Z051782AA Sample number(s) 4547133 <br /> Methyl Tertiary Butyl Ether 86 94 69-134 8 30 <br /> Benzene 93 101 83-128 8 30 • <br /> Toluene 95 103 83-127 8 30 <br /> Ethylbenzene 94 101 82-129 7 30 <br /> Xylene (Total) 93 100 62-130 7 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH - DRO CA LUFT (Waters) <br /> Batch number 051720019A <br /> Orthoterphenyl <br /> 4547134 134 <br /> 4547135 97 <br /> 454'7136 97 <br /> 4547137 82 <br /> 4547138 88 <br /> 4547139 67 <br /> 454'7140 86 <br /> 4547141 123 <br /> 4547142 97 <br /> 4547143 96 <br /> 4547144 86 <br /> Blank 92 <br /> LCS 104 <br /> LCSD 101 <br /> Limits 52-134 <br /> Analysis Name TPH Fuels by GC (Waters) <br /> Batch number 051720020A <br /> Chlorobenzene orthoterphenyl <br /> 4547134 69 141 <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 />