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885 Jarvis Dr <br /> Sequoia Mcrgan 1iiQ,CA 95037 <br /> Analytical (408)776-9600 <br /> FAX(408)782-6308 <br /> www xquoialabs can <br /> =Gateway <br /> Project ARCO#2093,Tracy,CA MLL0772 <br /> e 300 Project Number ARCO#2093,Tracy,CA Reported <br /> Project Manager Vern Elarth 01/07/03 14 23 <br /> Gaso11ne1BTEX\Oxygenates by EPA method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Lirnit Units Dilution Batch Prepared Analyzed Method Notes <br /> DI-34 112 MLL0772-03 Soil Sampled 12/18/02 10 25 Received 12/18/02 10 38 <br /> Tert-butyl alcohol ND 0 050 mg/kg 1 2120501 12/31/02 12/31/02 EPA 8260B <br /> Methyl tert-butyl ether ND 00050 <br /> Di-isopropyl ether ND 00050 " ^ <br /> Ethyl tent-butyl ether ND 00050 " <br /> Tert-amyl methyl ether ND 00050 <br /> Benzene ND 00050 <br /> Ethylbenzene ND 00050 ^ <br /> Toluene ND 00050 <br /> Xylenes(total) 0 023 0 010 " <br /> Gasoline(C6-Cl0) ND 1 0 <br /> Surrogate 12-DCA-d4 88% 80-140 „ <br /> Surrogate Toluene-d8 110% 60-140 ^ <br /> Surrogate 4-BFB 106% 60-140 <br /> DI-4-4 112 MLL0772-04 Soil Sampled 12/18/02 10 30 Received 12/18/02 10 38 <br /> Tert-butyl alcohol ND 0 050 mg/kg 1 2120501 12131!02 01/01/03 EPA 8260B <br /> 0ththy] <br /> tert-butyl ether ND 00050 <br /> " <br /> -isopropyl ether ND 00050 <br /> yl tert-butyl ether ND 00050 <br /> Tert-amyl methyl ether ND 00050 ^ <br /> Benzene ND 00050 <br /> Ethylbenzene ND 00050 " ^ <br /> Toluene ND 00050 " ^ <br /> Xylenes(total) ND 0 010 <br /> Gasohne(C6-CIO) ND 10 " ^ <br /> Surrogate 1,1-DCA-d4 80% 60-140 ^ <br /> Surrogate Toluene-d8 122% 60-140 " <br /> Surrogate 4-BFB 108% 60-140 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> . This analytical report must be reproduced in its entirety <br /> Page 4 of 15 <br />