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Lancaster <br /> Laboratories Analysis Report <br /> 25 New Holland Pike PO Box 12425 Lancaster PA 17605-2425•717-656-2304 Fax 717-656-2681•www lancasterlabs com <br /> Page 2 of 4 <br /> Quality Control Summary <br /> Client Name ChevronTexaco Group Number 980350 <br /> Reported 03/11/06 at 02 13 PM <br /> Analysis NamaREC %REC Limits RPD MAX Conn cone RPD Max <br /> Batch number 06066A20A Sample number(s) 4721782 UNSPK 4721782 <br /> TPH-GRO - Waters 98 63-154 <br /> Batch number 06066B20A Sample number(s) 4721763 UNSPK 4721783 <br /> TPH-GRO - Waters 105 63-154 <br /> Batch number 06067AOBA Sample number(s) 4721760-4721781 UNSPK P722243 <br /> TPH-GRO - Waters 123 122 63-154 1 30 <br /> Batch number 0606BA16A Sample numbers) 4721784-4721785 UNSPK P721537 <br /> TPH-GRO - Waters 115 63-154 <br /> Batch number Z060663AA Sample number(s) 4721781-4721786 UNSPK P721550 <br /> Ethanol 109 106 34-161 3 30 <br /> Methyl Tertiary Butyl Ether 92 95 69-127 3 30 <br /> di.-Isopropyl ether 93 95 75-130 2 30 <br /> Ethyl t-butyl ether 95 96 78-119 2 30 <br /> t-Amyl methyl ether 96 98 72-125 3 30 <br /> t-Butyl alcohol B9 89 64-130 1 30 <br /> Benzene 103 104 83-128 1 30 <br /> 1,2-Dzchloroethane 102 102 70-143 1 30 <br /> Toluene 104 104 83-127 1 30 <br /> 1,2-Dibromoethane 96 99 78-120 3 30 <br /> 6 thylbenzene 103 102 62-129 1 30 <br /> ylene (Total) 89 87 82-130 1 30 <br /> Batch number Z060671AA Sample number(s) 4721780 UNSPK P721567 <br /> Ethanol 119 123 34-161 3 30 <br /> Methyl Tertiary Butyl Ether 88 67 69-127 2 30 <br /> di-Isopropyl ether 90 88 75-130 2 30 <br /> Ethyl t-butyl ether 90 88 78-119 2 30 <br /> t-Amyl methyl ether 94 92 72-125 2 30 <br /> t-Butyl alcohol 87 88 64-130 1 30 <br /> Benzene 100 97 83-128 3 30 <br /> 1,2-Dichloroethane 100 97 70-143 3 30 <br /> Toluene 101 98 83-127 3 30 <br /> 1,2-Dibromoethane 94 91 78-120 3 30 <br /> Ethylbenzene 99 97 82-129 2 30 <br /> Xylene {Total} 97 94 82-130 3 30 <br /> Surrogate Quality Control <br /> Surrogate recoveries which are outside of the QQ window are confirmed <br /> unless attributed to dilution or otherwise noted on the Analysis Report <br /> Analysis Name TPH-GRO - Waters <br /> Batch number 06066A20A <br /> Trifluorotoluene-F <br /> 4721782 89 <br /> Blank 90 <br /> LCS 110 <br /> LCSD 110 <br /> MS 109 <br /> *-Outside of specification <br /> 1) The result for one or both determinations was less than five tunes the LOQ <br /> 102) The background result was more than four times the spike added <br />