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` 1551 Industrial It <br /> � <br /> Sequoia Sari Carlos <br /> rlosCA9407070 <br /> c6sa)z3z-46oa <br /> IW <br /> Analytical FAX(650)232-4612 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategies(1) Project Tosco(l) <br /> 6747 Sierra Court,Suite J Project Number Tosco(Unocal)SS46981,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 12/27/01 0939 <br /> :: <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 /> h9W_g(L112085-05)Water Sampled ]_2112101 14 10 Received 12/13/01 19 40 _ <br /> Ethanol ND 500 ug/l 1 1120086 12/21/01 -12/21/01 EPA 8260B <br /> 1,2-Dibromoetbane ND 10 " <br /> 1,2-Dichloroethane ND 10 <br /> Di-isopropyl ether ND 10 <br /> Ethyl tent-butyl ether ND 10 ^ <br /> Methyl ten-butyl ether ND 10 ^ <br /> Tert-amyl methyl ether ND 10 <br /> Tert-butyl alcohol ND 20 <br /> Surrogate 1,2-Dichloroethane-d4 852% 70-130 " <br /> Surrogate Toluene-d8 102% 70-130 " <br /> MW-9(L]12085-06)Water Sampled 12/12/01 10 32 Received 12/13/01 19 40 <br /> Ethanol ND 500 ug/1 1 1120086 12/21/01 12/21/01 EPA 82608 <br /> 1,2-Dibromoethane ND 10 n n ^ <br /> 1,2-Dichloroethane ND 10 " <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tent-butyl ether ND 10 " <br /> Methyl ten-butyl ether ND 10 <br /> Tert-amyl methyl ether ND 10 " <br /> Tert-butyl alcohol ND 20 " <br /> Surrogate 1,2-Dichloroethane-d4 862% 70-130 " <br /> Surrogate Toluene-d8 102% 70-130 " <br /> ]11W-11 (LI12085-07)Water Sampled 12/12/01 12 10 Received 12/13/01 19 40 <br /> Ethanol ND 500 ug/I 1 1120086 12/21/01 12/21/01 EPA 8260B <br /> 1,2-Dibromoethane ND 10 " <br /> 1,2-Dichloroethane ND 10 " <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl ten bury]ether ND 1 0 " <br /> Teri-amyl methyl ether ND 1 0 " <br /> Teri-butyl alcohol ND 20 " <br /> Surrogate 1,2-Dichloroethane-d4 854% 70-130 " <br /> Surrogate Toluene-d8 100% 70-130 " <br /> Sequoia Analytical- San Carlos The results m 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 9 of 22 <br />