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819 Striker Ave Ste 8 C <br /> Sequoia Sacramento 9 <br /> (91 b)922 96001 9600 <br /> J Inal�T11imc lli www FAX(9 <br /> oiala 0100 <br /> www sequoialabs coni <br /> Gettler-Ryan-Petaluma Project Tosco 11192,Stockton,CA 5212209 <br /> 1364 N McDowell Blvd Ste B2 Project Number N/A Reported <br /> Petaluma CA,94954 Project Manager Dave Vossler 12/31/02 11 16 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Sacramento <br /> Reporting <br /> Analyte Result Limit Units Dilution Balch Prepared Analyzed Method Notes <br /> MW-12(6 5')(5212209-01)Sod Sampled 12/04/02 10 00 Received 12/06/02 09 00 <br /> Teri-butyl alcohol ND 0 050 mg/kg 1 2120184 12/16/02 12/16/02 EPA 8260E <br /> Methyl tert-butyl ether 00067 00050 " <br /> Di-isopropyl ether ND 00050 " <br /> Ethyl tert-butyl ether ND 00050 " <br /> Tert-amyl methyl ether ND 00050 " <br /> Ethanol ND 020 " <br /> 1,2-Di chloro ethane ND 00050 " <br /> 1,2-Dibromoethane(EDB) ND 00050 " <br /> Surrogate 12-DCA-d4 94% 60-140 " <br /> MW-12(115')(5212209-02)Soil Sampled 12/04/02 10 05 Received 12/06/02 09 00 _ <br /> Tert-butyl alcohol 025 0 050 mg/kg 1 2120184 12/16/02 12/16/02 EPA 8260E <br /> Di-isopropyl ether ND 00050 " <br /> Ethyl tert-butyl ether ND 00050 " <br /> Tert-amyl methyl ether 00053 00050 " <br /> Ethanol ND 020 " " " " " • <br /> 1,2-Dichloroetliane ND 00050 " <br /> 1,2-Dtbromoethane(EDB) ND 00050 " <br /> Surrogate 12-DCA-d4 92% 60-140 <br /> MW-12(I1 5')(S212209-02RE1)Soil Sampled 12/04/02 10 05 Received 12/06/02 09 00 HT-RS <br /> Tert-butyl alcohol ND 25 mg/kg 50 2120306 12/12/02 12/19/02 EPA 8260B <br /> Methyl tert-butyl ether 1 1 025 " <br /> Di-isopropyl ether ND 025 " <br /> Ethyl tert-butyl ether ND 025 " <br /> Tert-amyl methyl ether ND 025 " <br /> Ethanol ND 10 " <br /> 1,2-Dichloroethane ND 025 " <br /> 1,2-Dibromoethane(EDB) ND 025 " <br /> Surrogate 12-DCA-d4 76% 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 Unless otherwise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entrrety <br /> Page 4 of 13 <br />