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• 819 Striker Avenue,Suite 8 <br /> 5834 <br /> �Y <br /> Sacramento,916)9 99600 <br /> Sequoia (916)921-9600 <br /> Analyttcal FAX(916)921-0100 <br /> www.se9uoialabs.com <br /> URS-Sac,Gateway Oaks Project. ARCO 760,Lodi,CA <br /> Project Number: 760,Lodi,CA Reported: <br /> 2870 Gateway Oaks Dr.,Ste.300 <br /> ' Project Manager: Vernon Elarth 08/27/02 15:59 <br /> Sacramento CA,95833 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> rP13 9 S(S208245-09)Soil Sampled:08/20/02 13.17 Received:08/20/02 15:56 <br /> Tert-butyl alcohol ND 0.050 mg/kg 1 2080223 08/22/02 08/22/02 EPA 8260B <br /> Methyl tert-butyl ether 0.0076 0.0050 <br /> Di-isopropyl ether ND 0.0050 <br /> Ethyl tert-butyl ether ND 0.0050 <br /> Tert-amyl methyl ether ND 0.0050 <br /> Surrogate:1,2-DCA-d4 88% 60-140 <br /> PB 10 N(S208245-10)Soil Sampled;08/20/02 13.44 Received:08/20/02 15:56 R-05 <br /> Tert-butyl alcohol ND 5.0 mg/kg 2 2080219 08/22/02 08/22/02 EPA 8260B <br /> Methyl tert-butyl ether ND 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 /> Surrogate: 1,2-DCA-d4 87% 60-140 <br /> PB 11 M(S208245-11)Soil Sampled:08/20/02 13.32 Received:08/20/02 15:56 <br /> Tert-butyl alcohol ND 0.050 mg/kg 1 2080229 08/23/02 08/23/02 EPA 8260B <br /> Methyl tert-butyl ether 0.051 0.0050 <br /> Di-isopropyl ether ND 0.0050 <br /> Ethyl tert-butyl ether ND 0.0050 <br /> Tert-amyl methyl ether ND 0.0050 " <br /> Surrogate:1,2-DCA-d4 93% 60-140 <br /> PB-12-S(S208241-12)Soil Sampled:08/20/02 13:24 Received:08/20/02 15:56 <br /> ' Tert-butyl alcohol ND 0.050 mg/kg 1 2080229 08/23/02 08/23/02 EPA 8260B <br /> Methyl tert-butyl ether 0.020 0.0050 <br /> Di-isopropyl ether ND 0.0050 <br /> Ethyl tert-butyl ether ND 0.0050 <br /> Tert-amyl methyl ether ND 0.0050 <br /> Surrogate:1,2-DCA-d4 93% 60-140 <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 8 of 14 <br />