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885 Jarvis Drive <br /> Sequoia Morgan Hill,CA 95037 <br /> Analytical <br /> y� `7t / (408)776-9600 <br /> 1 nal r `ical <br /> FAX(408)7abs.co8 <br /> J www.sequoialabs.com <br /> URS Corporation(1) Project: ARCO 4434 NILJO673 <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO 1!434 Reported: <br /> Sacramento CA,95833 Project Manager: Vern Etarth 11/12/02 14:57 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> PB-3(MLJ0673-03)Soil Sampled: 10/22/02 11:55 Received: 10/22/02 16:30 <br /> Total Xylenes ND 1.5 ug/kg 3.0099999 2J28036 10/28/02 10/28/02 EPA 8260B <br /> Benzene ND 1.5 i <br /> Ethylbenzene ND 1.5 " <br /> Toluene ND 1.5 " <br /> Surrogate:Dibromofluoromethane 102% 60-140 " <br /> Surrogate: 1,2-Dichloroethane-d4 99,2% 60-140 " <br /> Surrogate: Toluene-d8 82.4% 60-140 " <br /> Surrogate:4-Bromofluorobenzene 97.8% 60-140 " <br /> tert-Butyl alcohol ND 60 3.0099999 0-10 <br /> Methyl tent-butyl ether ND 1.5 <br /> Di-isopropyl ether ND 1.5 " <br /> Ethyl tert-butyl ether ND 1.5 " <br /> tert-Amyl methyl ether ND 1.5 <br /> Surrogate: 1,2-Dichloroethane-d4 99.2% 60-140 <br /> PB-4(MLJ0673-04)Soil Sampled: 10/22/02 12:00 Received: 10/22/02 16:30 <br /> Total Xylenes ND 1.5 ug/kg 2.9200000 2128036 10/28/02 10/28/02 EPA 8260B <br /> Benzene ND 1.5 " <br /> Ethylbenzene ND 1.5 " <br /> Toluene ND 1.5 <br /> Surrogate:Dibromofluoromethane 104% 60-140 " <br /> Surrogate: 1,2-Dichloroethane-d4 97.2% 60-140 " <br /> Surrogate: Toluene-d8 83.4% 60-140 ' <br /> Surrogate:4-Bromofluorobenzene 105% 60-140 " <br /> tert-Butyl alcohol ND 58 2.9200000 0-10 <br /> Methyl tert-butyl ether ND 1.5 <br /> Di-isopropyl ether ND 1.5 ; <br /> Ethyl tent-butyl ether ND 1.5 <br /> tert-Amyl methyl ether ND 1.5 " <br /> Surrogate: 1,2-Dichloroethane-d4 972% 60-140 " <br /> I <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. This analytical report must be reproduced in its entirety. <br /> 7of15 <br />