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Sequoia 885 Jarvis Drive <br /> �7 Morgan Hill,CA 95037 <br /> Analytical FAX(408)782-6308 c4og)772-9600 <br /> www.sequoialabs.con <br /> URS Corporation 111 Project: ARCO#548,Stockton,Ca <br /> 2870 Gateway Oaks Dr.,Ste 300 Project Number: ARCO#548,Stockton,CA Reported: <br /> Sacramento CA,95833 Project Manager: Vem Elarth 10/09/02 08:29 <br /> Total Purgeable Hydrocarbons (C6-C10)by EPA 8015B modified,BTEXM by EPA 8021B <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> Eff Air ML10645-03 it Sampled:09/24/02 08:20 Received:09/25/02 20:30 <br /> Gasoline Range Organics(C6-C10) ND 10 mg/m'Air 1 2I27003 09/27/02 09/27/02 8015Bm/8021 <br /> B <br /> Benzene ND 0.10 " <br /> Toluene ND 0.10 <br /> Ethylbenzene ND 0.10 " <br /> Xylenes(total) ND 0.10 " <br /> Methyl tent-butyl ether ND 0.50 " <br /> Surrozate:ax.a-Tri>`luorotoluene 88.0% 70-130 " <br /> Gasoline Range Organics(C6-C10) ND 10 ugn " <br /> Benzene ND 0.10 " <br /> Toluene ND 0.10 <br /> Ethylbenzene ND 0.10 <br /> Xylenes(total) ND 0.10 <br /> Methyl tert-butyl ether ND 0.50 " <br /> *urrocate:a.a.a-Trifluorotoluene 88.0% 70-130 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain <br /> • of custody document. This analytical report must be reproduced in its entirety. <br /> 3of8 <br />