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819 Striker Avenue,Suite 8 <br /> 5834 <br /> Sq Sacramento,)9 9 <br /> equoia (916)921-96009600 <br /> Analytical FAX(916)921-0100 <br /> ww.sequoialabs.com <br /> URS-Sac,Gateway Oaks Project: ARCO 760,Lodi,CA w <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 /> PB-1-N(S208245-01)Soil Sampled:08/20/02 11.58 Received:08/20/02 15:56 <br /> Tert-butyl alcohol ND 2.5 mg/kg 1 2080219 08/22/02 08/22/02 EPA 8260B <br /> Methyl tert-butyl ether 0.98 0.25 <br /> Di-isopropyl ether ND 0.25 <br /> Ethyl tert-butyl ether ND 0.25 <br /> Tert-amyl methyl ether ND 0.25 <br /> Surrogate:1,2-DCA-d4 90% 60-140 <br /> PB 2 M(S208245-02)Soil Sampled:08/20/02 12.55 Received:08/20/02 15:56 <br /> Tert-butyl alcohol 6.8 2.5 mg/kg 1 2080219 08/22/02 08/22/02 EPA 8260B <br /> Methyl tert-butyl ether 0.27 0.25 <br /> Di-isopropyl ether ND 0.25 <br /> Ethyl tert-butyl ether ND 0.25 <br /> Tert-amyl methyl ether ND 0.25 <br /> Surrogate:1,2-DCA-d4 85% 60-140 <br /> PB-3-S(5208245-03)Soil Sampled:08/20/02 12.47 Received:08/20/02 15:56 <br /> Tert-butyl alcohol ND 0.050 mg/kg 11 2080223 08/22/02 08/22/02 EPA 8260B <br /> Methyl tert-butyl ether 0.021 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 97% 60-140 <br /> PB-4-N(S208245-04)Soil Sampled:08/20/02 12.13 Received:08/20/02 15:56 <br /> Tert-butyl alcohol 0.071 0.050 mg/kg 1 2080223 08/22/02 08/22/02 EPA 8260B <br /> Methyl tert-butyl ether 0.0051 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 98% 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 /> iPage Page 6 of 14 <br /> f <br />