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` 819 Striker Avenue,Suite 8 <br /> Sequoia Sacramento,CA 95834 <br /> Alyl• (916)921-9600 <br /> tica <br /> na <br /> FAX(916)921-0100 <br /> www.sequoialabs.com ' <br /> URS-Sac,Gateway Oaks Project: ARCO 760,Lodi,CA <br /> 2870 Gateway Oaks Dr.,Ste.300 Project Number: 760,Lodi,CA Reported: <br /> 'Sacramento CA,95833 Project Manager: Vernon Elarth 08/30/02 13:59 <br /> Gasoline\BTEX\Oxygenates by EPA method 8260B <br /> Sequoia Analytical-Sacramento ' <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> SW-N(S208329-04RE1)Soil Sampled:08/23/02 12.15 Received:08/23/02 14.35 ' <br /> Methyl tert-butyl ether 0.16 0.025 mg/kg 5 2080274 08/28/02 08/28/02 EPA 8260B <br /> Surrogate:1,2-DCA-d4 83% 60-140 <br /> Surrogate:Toluene-d8 105% 60-140 <br /> Surrogate:4-BFB 93% 60-140 <br /> SW-E(S208329-05)Soil Sampled:08/23/02 12.25 Received:08/23/02 14.35 <br /> Tert-butyl alcohol ND 5.0 mg/kg 1 2080295 08/29/02 08/29/02 EPA 8260B ' <br /> Methyl tert-butyl ether 1.4 0.50 <br /> Di-isopropyl ether ND 0.50 <br /> Ethyl tert-butyl ether ND 0.50 <br /> Tert-amyl methyl ether ND 0.50 <br /> 1,2-Dichloroethane ND 0.50 <br /> 1,2-Dibromoethane(EDB) ND 0.50 " <br /> Benzene ND 0.50 <br /> Ethylbenzene ND 0.50 <br /> Toluene ND 0.50 " <br /> Xylenes(total) ND 0.50 <br /> Gasoline(C6-C10) 160 100 " <br /> ' HC-12 <br /> Surrogate:1,2-DCA-d4 85% 60-140 " <br /> Surrogate:Toluene-d8 102% 60-140 " <br /> Surrogate:4-BFB 124% 60-140 <br /> SP-14(Composite)(S208329-06)Soil Sampled:08/23/02 00:00 Received:08/23/02 14.35 <br /> Benzene ND 0.0050 mg/kg 1 2080229 08/23/02 08/23/02 EPA 8260B <br /> Ethylbenzene ND 0.0050 <br /> Toluene ND 0.0050 " <br /> Xylenes(total) ND 0.0050 <br /> Gasoline(C6-C10) 2.0 1.0 " • ' <br /> �� HC-12 <br /> Surrogate:1,2-DCA-d4 87% 60-140 <br /> Surrogate:Toluene-d8 113% 60-140 <br /> Surrogate:4-BFB 124% 60-140 " <br /> 1 <br /> Sequoia Analytical - Sacramento 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 /> Page Page 4 of 11 ' <br />