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1551 Industrial Road <br /> Sequoia San Ca650)23 -9600 <br /> (650)232-9640 <br /> Analytical FAX(650)232-9612 <br /> www.sequoialabs.com <br /> Gettler-Ryan/Geostrategies(I Project: Tosco(l) s>; <br /> 6747 Sierra Court,Suite J Project Number: UNOCAL SS#11195,LAT}1ROP,CA Reported: <br /> Dublin CA,94568 Project Manager: Deanna Harding 08/28/01 07:22 <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 /> 1%1\N'-4(L]08074-05)Water Sampled: 08/10/01 17:20 Received: 08/10/01 18:55 _ <br /> Ethanol ND 1000 ug/l 1 1080067 08/15/01 08/16/01 EPA 8260B <br /> 1,2-Dibromoethane ND 2.0 " <br /> 1,2-Dichloroethane ND 2.0 " <br /> Di-isopropyl ether ND 2.0 " <br /> Ethyl tert-butyl ether ND 2.0 " <br /> Methyl Cert-butyl ether 16 2.0 " <br /> Tert-amyl methyl ether ND 2.0 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate: 1,2-Dichloroethane-d4 109% 76-114 " <br /> Surrogate: Toluene-d8 102% 88-110 " <br /> NIW-5(LI 08074-06)Water Sninpled:08/10/01 16:15 Received: 08110/01 18:55 _ _ - <br /> Ethanol ND 20000 ug/l 20 1080068 08/16/01 08/16/01 EPA 8260B <br /> 1,2-Dibromoethane ND 40 " <br /> 1,2-Dichloroethane ND 40 " <br /> Di-isopropyl ether ND 40 " <br /> >:a <br /> Ethyl Cert-butyl ether ND 40 " <br /> Methyl Cert-butyl ether 3700 40 " <br /> Tert-amyl methyl ether ND 40 " <br /> Tert-butyl alcohol ND 2000 " <br /> Surrogate:1,2-Dichloroethane-d4 109% 76-114 " <br /> Surrogate:Toluene-d8 105% 88-I JO " <br /> MW-6(L]OSO'14-07)Water Sampled:08/10/01 14:16 Received: 08/10/01 18:55 _ <br /> Ethanol ND 1000 ug/1 1 1080067 08/15/01 08/16/01 EPA 8260E <br /> 1,2-Dibromoethane ND 2.0 " <br /> ],2-Dichloroethatle ND 2.0 " <br /> Di-isopropyl ether ND 2.0 " <br /> Ethyl tert-butyl ether ND 2.0 " <br /> Methyl tert-butyl ether 9.8 2.0 " <br /> Tert-amyl methyl ether ND 2.0 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate: 1,2-Dichloroethane-d4 103% 76-114 " <br /> Surrogate: Toluene-d8 108% 88-110 <br /> Sequoia 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 in its entirety. <br /> Page 8 of 22 <br />