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Lancaster Laboratories Page 2 of 4 <br /> Where quality.is a science. <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 818893 <br /> Reported: 08/27/02 at 06:05 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BAG DUP DUP Dup <br /> RPD <br /> Analy6is Name %REC $REC Limits RPD MAX Conc Conc RPD Max <br /> Benzene (2) (2) 78-134 2 30 <br /> 1,2-Dichloroethane 151* 155* 73-136 2 30 <br /> Toluene 122 124 83-127 1 30 <br /> 1,2-Dibromoethane 9B 100 78-120 2 30 <br /> Ethylbenzene (2) (2) 82-134 1 30 <br /> Xylene (Total) (2) (2) 82-130 3 30 <br /> Batch number: N022281AB Sample number(s) : 3878889-3878891 <br /> Benzene (2) (2) 78-134 2 30 <br /> Toluene 122 124 83-127 1 30 <br /> Xylene (Total) (2) (2) 82-130 3 30 <br />' Surrogate Quality Control <br /> Analysis Name: TPR - DRO CA LUFT (Waters) <br /> Batch number: 022270002A <br />' Orthoterphenyl <br /> 3878885 129 <br /> 3878886 116 <br /> 3878887 119 <br /> 78888 97 <br /> 78889 114 <br /> 78890 76 <br /> 3878891 74 <br /> Blank 78 <br /> LCS 88 <br /> LCSD 84 <br /> Limits: 59-139 <br />' Analysis Name: TPH Fuels by GC (Waters) <br /> Batch number: 022270003A <br /> Orthoterphenyl <br /> 3878885 87 <br /> 1 3878886 91 <br /> 3878887 93 <br /> 3878888 69 <br /> 3878889 121 <br /> 3878890 104 <br />' 3878891 182* <br /> Blank 83 <br /> LCS 107 <br /> LCSD 103 <br /> Limits: 52-137 <br />' Analysis Name: TPH-GRO - Waters <br /> Batch number: 02227A56A <br /> Trifluorotoluene-F <br />' 3878885 82 <br /> 3878886 83 <br /> 3878887 83 <br /> 3878888 82 <br /> *-Outside of specification <br /> The result for one or both determinations was less than five times the LOQ. <br /> The background result was more than four times the spike added. <br /> Lancaster Laboratories.Inc. <br /> M E M B E R 2425 New Holland Pike <br /> PO Box 12425 <br /> Lancaster,PA17605-2425 <br /> 717-656-2300 00 Fax 717-6-6 <br /> 56-2681 2216 Rev.9111/00 <br />