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kLancaster <br /> Laboratories Analysis Report <br /> 425 New H0118nd Pske PO Box 12425 Lancaster,PA 17605-2425•717 656 2300 Fax 717-656-2681•www lancasterlabs Com <br /> Page 2 of 3 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 856625 <br /> Reported 06/29/03 at 10 38 PM <br /> Sample MatrIX Quality Control <br /> Ms MSD MS/MSD RPD BKG DUP DUP Dup <br /> RPD <br /> Analysis Name $REC %REC Limits RPD MAX Conc Conc RPD Max <br /> Ethyl t-butyl ether 110 109 '73-123 1 30 <br /> t-Amyl methyl ether 108 112 77-117 4 30 <br /> t-Butyl alcohol 106 109 39-155 3 30 <br /> Benzene 112 113 63-128 1 30 <br /> 1,2-Dichloroethane 111 113 73-136 2 30 <br /> Toluene 115 111 83-127 3 30 <br /> 1,2-Dlbromoethane 104 104 78-120 0 30 <br /> Ethylbenzene 109 107 82-134 1 30 <br /> Xylene (Total) 110 108 82-130 2 30 <br /> Batch number P031771AA Sample number(S) 4068538-4068539 <br /> Methyl Tertiary Butyl Ether 98 97 69-134 1 30 <br /> di-Isopropyl ether 100 101 75-130 1 30 <br /> Ethyl t-butyl ether 98 100 73-123 1 30 <br /> t-Amyl methyl ether 98 100 77-117 2 30 <br /> t-Butyl alcohol 96 98 39-155 2 30 <br /> Benzene 103 105 83-128 1 30 <br /> 1,2-Dichloroethane 98 99 73-136 1 30 <br /> Toluene 103 103 83-127 0 30 <br /> 1,2-Dibromoethane 98 98 78-120 1 30 <br /> Ethylbenzene 102 103 62-134 1 30 <br /> Oylene (Total) 103 104 82-130 0 30 <br /> Batch number P031791AA Sample number(s) 4068540 <br /> Methyl Tertiary Butyl Ether 91 95 69-134 3 30 <br /> di-Isopropyl ether 96 99 75-130 3 30 <br /> Ethyl t-butyl ether 94 97 73-123 3 30 <br /> t-Amyl methyl ether 94 96 77-117 2 30 <br /> t-Butyl alcohol 97 101 39-155 4 30 <br /> Benzene 100 101 83-128 2 30 <br /> 1,2-Dichloroethane (2) (2) 73-136 2 30 <br /> Toluene 102 104 83-127 1 30 <br /> 1,2-Dibromoethane 93 95 78-120 1 30 <br /> Ethylbenzene 104 106 82-134 2 30 <br /> Xylene (Total} 99 101 82-130 2 30 <br /> Surrogate Quality Control <br /> Analysis Name TPH-GRO - Water$ <br /> Batch number 03174A53A <br /> Trifluorotoluene-F <br /> 4068531 79 <br /> 4066532 80 <br /> 4068533 92 <br /> 4068534 82 <br /> 4068535 87 <br /> 4068536 87 <br /> 4068537 83 <br /> 4068538 B1 <br /> 4068539 87 <br /> 4068540 82 <br /> *-Outside of specification <br /> ]) 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 />