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404 N Wiget lane <br /> Sequoia Walnut Creek C 94598 <br /> (925) <br /> 8-9600 <br /> Analytical FAX equo alabs98&c 73 <br /> www sehuoialabs tom <br /> Gettler Ryan,Int- -Dublin Project Tosco <br /> 6747 Sierra Court Suite J Project Number Tosco# 11192 Reported <br /> Dublin CA,94568 Project Manager Doug Lee 10-May-01 11 24 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Walnut Creek <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note,. <br /> 84-10(W104569-07)Soil Sampled 24-Apr-01 00 00 Received 26-Apr-01 16 00 <br /> Ethanol ND 25 mg/kg 100 1E07009 07-May-01 09-May-01 EPA 8260B <br /> tert-Butyl alcohol ND 25 " <br /> Methyl tert-butyl ether ND 010 " <br /> Di-isopropyl ether ND 010 " <br /> Ethyl tert-butyl ether ND 010 " <br /> 1,2-Dichloroethane ND 010 " <br /> tertAmyl methyl ether ND 0 10 " <br /> 1,2-Dibromoethane ND 010 " <br /> Surrogate Dibromofluoromethane 114% 50-150 " <br /> Surrogate 1,2-Dichloroethane-d4 120% 50-150 " <br /> B4-16(W104569-08)Soil Sampled 24-Apr-01 00 00 Received 26-Apr-01 16 00 <br /> Ethanol ND 25 mg/kg 100 lE07009 07-May-01 09-May-01 EPA 8260E <br /> Butyl alcohol ND 2 5 <br /> yl tert-butyl ether ND 010 " <br /> Di-isopropyl ether ND 010 <br /> Ethyl tert-butyl ether ND 010 " <br /> 1,2-Dichloroethdne ND 010 " <br />—tent-Amyl methyl etherr - —ND—0 10 - - — - ----- <br /> 1,2-Dibromocthdne ND 010 " <br /> Surrogate Dibromofluoromethane 100% 50-150 <br /> Surrogate 1,2-Dichloroethane-d4 110% 50-150 <br /> B-5-10(W104569-09)Soil Sampled 25-Apr-01 00 00 Received 26-Apr-01 16 00 <br /> Ethanol ND 25 mglkg 100 1E07009 07-May-01 09-May-01 EPA 8260E <br /> tert-Butyl alcohol ND 2 5 " <br /> Methyl tert-butyl ether ND 0 10 " <br /> Di-isopropyl ether ND 0 10 " <br /> Ethyl tert-butyl ether ND 010 " <br /> 1,2-Dichloroethane ND 010 " <br /> tert-Amyl methyl ether ND 010 " <br /> 1,2-Dibromoethdne ND 010 " <br /> Surrogate Dibromoflu oroni ethane 980% 50-150 " <br /> Surrogate 1 2-Dichloroethane-d4 112% 50-150 <br /> oia Analytical-Walnut Creek The results in this report apply to the samples analyzed in accordance with the chain o/ <br /> custody document This analylrcal report must be reproduced in its entirels <br /> Page 8 of 12 <br />