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Lancaster Laboratories <br /> Where quality is a science. <br /> Page 2 of 4 <br />' Quality Control Summary <br /> Client Name. ChevronTexaco Group Number: 830264 <br /> Reported: 11/25/02 at 07:51 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKO DUP DUP Dup <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br />' Batch number: 02316A53A Sample number(s) : 3937821-3937826 <br /> TPH-GRO - Waters 96 102 74-132 7 30 <br /> Batch number: 02316A53B Sample number(s) : 3937820 <br /> TPH-GRO - Waters 96 102 74-132 7 30 <br /> Batch number: 023170018A Sample number(s) : 3937820-3937823 <br /> Methanol (by Direct Injection) 88 84 69-127 5 20 <br /> Batch number: 023250023A Sample number(s) : 3937824-3937825 <br /> Methanol (by Direct Injection) 100 96 69-127 4 20 <br /> Batch number: N023112AC Sample number(s) : 3937820-3937821 <br /> Ethanol 84 88 34-163 4 30 <br /> Methyl t-butyl ether 100 99 69-134 1 30 <br /> di-Isopropyl ether 97 94 68-133 3 30 <br /> Ethyl t-butyl ether 93 92 73-123 1 30 <br /> t-Amyl methyl ether 94 94 69-118 0 30 <br /> t-Butyl alcohol 95 93 51-148 2 30 <br /> Benzene 110 110 78-134 0 30 <br /> 105 103 73-136 2 30 <br /> oluene 111 112 83-127 1 30 <br /> 012-Dichloroethane <br /> ,2-Dibromoethane 97 96 78-120 1 30 <br /> Ethylbenzene 114 114 82-134 0 30 <br /> Xylene (Total) 114 113 82-130 1 30 <br /> Batch number: N023175AA Sample number(s) : 3937822-3937826 <br /> Ethanol 64 61 34-163 5 30 <br /> Methyl t-butyl ether 96 97 69-134 1 30 <br /> di-Isopropyl ether 98 98 68-133 0 30 <br />' Ethyl t-butyl ether 90 91 73-123 2 30 <br /> t-Amyl methyl ether 92 93 69-118 1 30 <br /> t-Butyl alcohol 71 69 51-148 3 30 <br /> Benzene 113 113 78-134 0 30 <br /> 1,2-Dichloroethane 104 305 73-136 0 30 <br /> Toluene 114 114 83-127 0 30 <br /> 1,2-Dibromoethane 91 92 78-120 0 30 <br /> Ethylbenzene 116 115 82-134 1 30 <br /> Xylene (Total) 115 115 82-130 0 30 <br />' <br /> Surrogate Quality g Q y Con r <br /> t of <br /> t Analysis Name: TPH - DRO CA LUFT (Waters) <br /> Batch number: 023160023A <br /> Orthoterphenyl <br /> 3937820 91 <br />' 3937821 92 <br /> 3937822 94 <br /> 3937623 91 <br /> 3937824 104 <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—r= PA B E Ft 2425 New Holland Pike <br /> Pp Sox 12425 <br /> Lancaster,PA 17605-2425 <br /> 717-656-2300 Fax:717-656-2681 2216 Rev,9!11!00 <br />