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Sequoia 8B5]awls 77is 9600 Morgan Hill.CA 95037 G) (4081 776-9600 `w Analytical rwsequ,7a2-6308 www.(408)782-63 8 URS Corporation J1 I Project: ARCO#434 ML30673 2870 Gateway Oaks Dr., Ste 300 Project Number: ARCO#434 Reported: Sacramento CA,95833 Project Manager: Vern Elarth 11/12/02 14:57 Volatile Organic Compounds by EPA Method 8260B Sequoia Analytical - Morgan Hill Reporting Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes DI-3(MLJ0673-09)Soil Sampled: 10/22/02 12:30 Received: 10/22/02 16:30 Total Xylenes NO 1.2 ug/kg 2.4000000 2728036 10/28/02 10/29/02 EPA 8260B Benzene NO 1.2 " Ethylbenzene ND 1.2 " Toluene ND 1.2 " Surrogate:Dibromofluoromethane 102% 60-140 " Surrogate: 1,2-Dichloroethane-d4 101% 60-140 " Surrogate: Toluene-d8 83.2% 60-140 " Surrogate:4-Bromofluorobenzene 92.2% 60-140 " tert-Butyl alcohol ND 48 2.4000000 " 0-10 Methyl tert-butyl ether ND 1.2 " Di-isopropyl ether ND 1.2 It " Ethyl tert-butyl ether ND 1.2 It " tert-Amyl methyl ether ND 1.2 " Surrogate: 1,2-Dichloroethane-d4 101 % 60-140 " D14(MLJ0673-10)Soil Sampled: 10/22/02 12:40 Received: 10/22/02 16:30 Total Xylenes NO 1.2 ug/kg 2.3900001 2128036 10/28/02 10/29/02 EPA 8260B Benzene NO 1.2 " " " Ethylbenzene ND 1.2 " Toluene NO 1.2 " Surrogate:Dibromofluoromethane 103% 60-140 " Surrogate: 1,2-Dichloroethane-d4 105% 60-140 " Surrogate: Toluene-d8 84.4% 60-140 " Surrogate:4-BromoJluorobenzene 95.8% 60-140 " tert-Butyl alcohol NO 48 2.3900001 0-10 Methyl tert-butyl ether NO 1.2 " Di-isopropyl ether NO 1.2 " Ethyl tert-butyl ether NO 1.2 " tert-Amyl methyl ether NO 1.2 Surrogate: 1,2-Dichloroethane-d4 105% 60-140 " Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyfed in accordance with the chain of custody document This analytical report must be reproduced in its entirety. 10 of 15