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Lancaster <br /> Laboratories analysis Report <br /> 2425 New Holland Pike,PO Box 12425,Lancasler,PA 176052425•717.658-2300 Fax:717-656-2681-www.lanCosteriabs.com <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Client Name: ChevronTexaco Group Number: 905016 <br /> Reported: 08/03/04 . at 02 :16 PM <br /> Sample Matrix Quality Control <br /> MS MSA MS/MSD RPD SRO DUP DUP Dup APD 1 <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number: N042111BB Sample number(s) : 4316861 <br /> Methyl Tertiary Butyl Ether 113 69-134 <br /> Benzene 116 83-128 <br /> Toluene 113 83-127 <br /> ' Ethylbenzene 109 82-129 <br /> Xylene (Total) 110 82-130 <br /> Batch number: Z042122AA Sample number(s) : 4316882-4316884 <br /> Ethanol 106 105 41-155 1 30 <br /> Methyl Tertiary Butyl Ether 105 108 69-134 2 30 <br /> di-Isopropyl ether 114 116 75-130 2 30 l <br /> Ethyl t-butyl ether 101 102 78-119 1 30 <br /> t=Amyl methyl ether 93 94 77-117 1 30 <br /> t-Butyl alcohol 90 90 51-147 0 30 <br /> Benzene 101 102 83-128 1 30 <br /> Toluene 100 101 83-127 2 30 <br /> Ethylbenzene 99 100 62-129 1 30 <br /> Xylene (Total) 95 97 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name: Methanol and Ethanol <br /> Batch number: 042080020A <br /> Acetone <br /> 4316882 98 <br /> 4316883 97 <br /> Blank 102 <br /> LCS 98 <br /> MS 98 <br /> MSD 97 <br /> i <br /> Limits: 80-132 <br /> Analysis Name: TPH-GRO - Waters <br /> Batch number: 0420BA07B <br /> Trifluorotoluene-F <br /> 4316861 101 <br /> 4316882 101 <br /> 4316883 101 <br /> Blank 100 <br /> LCS 125 <br /> LCSD 126 <br /> MS 147* <br /> Limits: 57-146 <br /> Analysis Name: TPH-GRO - Waters <br /> Batch number: 04208A07C <br /> Trifluorotoluene-F <br /> *-Outside of specification <br /> (l) 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 /> L <br />