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Lancaster <br /> Laboratories Analysis Report <br /> 2425 New Holland Pike PO Box 12425 Lancaster PA 17605-2425•717 656 2300 Fax 717-656-2681•www lancaslerlabs com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client=Name =GhevronTexaco Group-Number —879333 <br /> Reported 12/30/03 at 04 27 PM <br /> Sample Matrix Quality Control <br /> MS MSD MS/MSD RPD EKG DUP DUP Dup <br /> RPD <br /> Analysis Name %REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Batch number^ 03357A16A Sample number(s) 4189771-4189775 <br /> TPH-GRO - Waters 120 63-154 <br /> Batch number 03358A16A Sample numberis) 4189768-4189770 <br /> TPH-GRO - Waters 105 63-154 <br /> Batch number 03358A16B Sample number(s) 4189767 <br /> TPH-GRO - Waters 105 63-154 <br /> Batch number P033601AA Sample number(s) 4189766 <br /> Methyl Tertiary Butyl Ether 86 88 69-134 1 30 <br /> Benzene 92 92 83-128 0 30 <br /> Toluene 91 94 83-127 3 30 <br /> Ethylbenzene 94 97 82-129 3 30 <br /> Xylene (Total) 91 95 82-130 4 30 <br /> Batch number P033611AA Sample number(s) 4189768,4189770-4189775 <br /> Methyl Tertiary Butyl Ether 96 94 69-134 2 30 <br /> di-Isopropyl ether 97 96 75-130 2 30 <br /> Ethyl t-butyl ether 98 96 78-119 2 30 <br /> t-Amyl methyl ether 98 96 77-117 2 30 <br /> t-Butyl alcohol 102 105 44-150 3 30 <br /> Benzene 101 100 83-128 2 30 <br /> 1,2-Dichloroethane 93 90 73-136 3 30 <br /> Toluene 100 98 83-127 2 30 <br /> 1,2-Dibromoethane 98 96 78-120 2 30 <br /> Ethylbenzene 99 96 82-129 1 30 <br /> Xylene (Total) 99 97 82-130 2 30 <br /> Batch number P033631AA Sample number(s) 4189767,4189769 <br /> Methyl Tertiary Butyl Ether 92 94 69-134 2 30 <br /> di-Isopropyl ether 95 96 75-130 1 30 <br /> Ethyl t-butyl ether 96 96 78-119 1 30 <br /> t-Amyl methyl ether 94 93 77-117 1 30 <br /> t-Butyl alcohol 91 101 44-150 10 30 <br /> Benzene 99 100 83-128 0 30 <br /> 1,2-Dichloroethane 89 90 73-136 0 30 <br /> Toluene 96 96 83-127 0 30 <br /> 1,2-Dibromoethane 91 92 78-120 1 30 <br /> Ethylbenzene 95 95 82-129 0 30 <br /> Xylene (Total) 95 95 82-130 0 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 03356A51A <br /> Trifluorotoluene-F <br /> 4189766 84 <br /> Blank 84 <br /> LCS 86 <br /> LCSD 84 <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 Mmes the spike added <br />