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LancasterAnalysis Repor# <br /> Laboratories Y • <br /> 2425 New Holland Pkke PO Box 12425 Lancaster PA 17605-2425 717-656 2300 Fax 717 656-2681•www IanCasterlabs com <br /> pane 7 of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 949983 <br /> Reported 07/15/05 at 01 35 PM <br /> Sample Matrix Quality Control <br /> Ms MSD MS/MSD RPP EKG DUP DUP Dup RPD <br /> Analysis Name �REC 15REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number W051892AA Sample number(s) 4556473 <br /> Methyl Tertiary Butyl Ether 88 94 69-134 6 30 <br /> Benzene 95 100 83-128 5 30 <br /> Toluene 95 99 83-127 5 30 <br /> Ethylbenzene 94 99 82-129 5 30 <br /> Xylene (Total) 95 100 82-130 5 30 <br /> Batch number Z051921AA Sample number(S) 4556474-4556479 <br /> Ethanol 114 113 26-153 1 30 <br /> Methyl Tertiary Butyl Ether 98 97 69-134 1 30 <br /> di-Isopropyl ether 106 106 75-130 0 30 <br /> Ethyl t-butyl ether 100 99 78-119 1 30 <br /> t-Amyl methyl ether 95 94 77-117 1 30 <br /> t-Butyl alcohol 92 94 51-147 2 30 <br /> Benzene 107 107 83-126 0 30 <br /> Toluene 108 108 83-127 1 30 <br /> Ethylbenzene 106 107 82-129 1 30 <br /> Xylene (Total) 104 105 82-130 1 30 <br /> Batch number Z051922AA Sample number(s) 4556480-4556483 <br /> Ethanol 10B 108 26-153 0 30 <br /> Methyl Tertiary Butyl Ether 90 91 69-134 2 30 <br /> di-Isopropyl ether 100 101 75-130 1 30 <br /> Ethyl t-butyl ether 93 95 78-119 2 30 <br /> t-Amyl methyl ether 89 90 77-117 2 30 <br /> t-Butyl alcohol 93 85 51-147 9 30 <br /> Benzene 103 102 83-128 1 30 <br /> Toluene 103 103 83-127 0 30 <br /> Ethylbenzene 97 99 82-129 1 30 <br /> Xylene (Total) 95 95 82-130 1 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 0518BA16A <br /> Trifluorotoluene-F <br /> 4556473 98 <br /> 4556474 97 <br /> 4556475 105 <br /> 4556476 98 <br /> 4556477 97 <br /> 4556478 98 <br /> 4556479 98 <br /> 4556480 96 <br /> 4556481 98 <br /> 4556482 92 <br /> 4556483 98 <br /> Blank 96 <br /> LCS 99 <br /> LCSD 100 <br /> MS 101 <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 />