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819 Striker Avenue,Suite 8 ' <br /> a— ) Sequoia Sacramento,CA 95834 <br /> (916)921-9600 <br /> iW Analytical 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 08/27/02 15:59 , <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 /> P13-5-M(S208245-05)Soil Sampled:08/20/02 14.00 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 0.41 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 86% 60-140 <br /> PB-6-S(S208245-06)Soil Sampled:08/20/02 13:09 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 ND 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 90% 60-140 " <br /> PB-7-N(5208245-07)Soil Sampled:08/20/02 13.23 Received:08/20/02 15.56 <br /> Tert-butyl alcohol ND 0.10 mg/kg 2 2080229 08/23/02 08/23/02 EPA 8260B <br /> Methyl tert-butyl ether 0.20 0.010 <br /> Di-isopropyl ether ND 0.010 <br /> Ethyl tert-butyl ether ND 0.010 " <br /> Tert-amyl methyl ether ND 0.010 " <br /> Surrogate:1,2-DCA-d4 101 % 60-140 " <br /> PB-8-M(S208245-08)Soil Sampled:08/20/02 14:10 Received:08/20/02 15.56 <br /> Tertbutyl alcohol ND 0.050 mg/kg 1 2080223 08/22/02 08/22/02 EPA 8260B ' <br /> Methyl tert-butyl ether ND 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 96% 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 7 of 14 <br />