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1551 Industrial Road <br /> Sequoia San Carlos 23 0 <br /> q1WAnalytical00 <br /> (650)232-96 <br /> FAX -9fi{650)232-961212 <br /> www sequoialabs coin <br /> ler-RyanlGeostrategies(1) Project Tosco(1) <br /> 7 Sierra Court, Suite J Project Number Tosco(Unocal)SS#6981 Stockton, CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 09/27/01 10 19 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> P14W-14 (L109080-11)Water Sampled_09/12/01 12 45 Received_09/13/01 19 30 _ <br /> Ethanol ND 1000 ug/l 1 1090076 09/20/01 09/20/01 EPA 8260B <br /> 1,2-Dibromoethane ND 20 " <br /> 1,2-Dichloroethane ND 20 " <br /> Di-isopropyl ether ND 20 <br /> Ethyl tert-butyl ether ND 20 " <br /> Methyl Cert-butyl ether 61 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,1-Dichloroethane-d4 106% 76-114 " <br /> Surrogate Toluene-d8 990% 88-110 " <br /> i <br /> MW-15(LI 09080-12)Water Sam pled 09/12/01 12 05 Received 09/13/01 19 30 <br /> Ethanol ND 1000 ugll 1 1090076 09/20/01 09/20/01 EPA 8260B <br /> 1,2-Dibromoethane ND 20 " <br /> 1,2-Dichloroethane ND 20 <br /> propyl ether ND 20 <br /> MW ten-butyl ether ND 20 " <br /> Methyl Cert-butyl ether 28 20 <br /> Ter(-amyl methyl ether ND 20 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dichloroethane-d4 104% 76-114 <br /> Surrogate Toluene-d8 100% 88-110 " <br /> MW-16(L109080-13)Water Sampled 09/12/01 13 40 Received 09/13/01 19 30_ <br /> Ethanol ND 1000 ugA 1 1090076 09/20/01 09/20/01 EPA 8260B <br /> 1,2-Dibromoethane ND 20 <br /> 1,2-Dichloroethane ND 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 <br /> Methyl tert-butyl ether 190 20 ^ " <br /> Tert-amyl methyl ether ND 20 <br /> Tert-butyl alcohol ND 100 <br /> Surrogate 1,1-Dichloroethane-d4 102% 76-114 " <br /> Surrogate Toluene-d8 101 % 88-110 " <br /> Dia Analytical - San Carlos 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 rn its entirety <br /> Page I I of 21 <br />