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LancasterIf. <br /> x <br /> Laboratories Analysis Report, <br /> 2425 New Holland Pike,PO Box 12425,Lancaster,PA 17805-2425•717-656-2300 Fax:717-656-2681•www.lancastertabs.com <br /> Page 2 of 3 <br /> Quality Control Summary' <br /> Client Name: ChevronTexaco Group Number: 872571 <br /> Reported: 11/07/03 at 10:51 AM - ' <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD BKG DUP DUP pup <br /> RPA , <br /> Analysis Name %REC $REC Limits RPA MAX Conc Conc RPA Max <br /> Ethanol 82 82 38-149 1 30 <br /> Methyl Tertiary Butyl Ether 96 96 69-134 0 30 <br /> di-Isopropyl ether 94 95 - 75-130 1 30 <br /> Ethyl t-butyl ether 92 92 78-119 0 30 <br /> t-Amyl methyl ether 96 96 77=117 0 30 <br /> t-Butyl alcohol 104 104 44-150 0 30 <br /> Benzene 101 101 83-128 1 30 <br /> 1,2-Dichloroethane 96 97 73-136 1 30 <br /> Toluene 99 100 83-127 1 30 <br /> .1,2-Dibromoethane 93 94 78-120 1 30 <br /> Ethylbenzene 102 103 82-129 1 30 <br /> Xylene (Total) 100 102" 82-130" 2 30 <br /> Batch number: P033032AA Sample number{s) : 4152621-4152623 <br /> Methyl Tertiary Butyl Ether 107 104 69-134 1 30 <br /> Benzene 108 107 83-128 1 30 <br /> Toluene 111 110 83-127 1 30 <br /> Ethylbenzene 110 109 82-129 1 30 <br /> Xylene (Total) 112 110 82-130 2 - 30 <br /> Surrogate Quality Control <br /> Analysis Name: TPH-GRO - Waters <br /> Batch number: 03301A51A <br /> Trifluorotoluene-F <br /> 4152615 70 <br /> 4152616 71 <br /> 4152617 70 <br /> 4152618 72 <br /> 4152619 71 <br /> 4152620 71 <br /> 4152621 72 <br /> 4152622 73 <br /> 4352623 71 <br /> 4152624 68 <br /> 4152625 72 <br /> Blank 76 <br /> LCS 74 <br /> LCSD 72 <br /> MS 74 <br /> Limits: 57-146 <br /> Analysis Name: Methanol and Ethanol <br /> Batch number: 033070007A <br /> Acetone <br /> 4152624 108 <br /> 4152625 106 <br /> Blank 103 <br /> LCS 104 <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 />