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(D (651551 Industrial Road <br /> Sequoia San Carlos CA 94070 <br /> �W Analytical <br /> 0)232-9600 <br /> FAX(650)232-4612 <br /> www sequoialabs com <br /> eT-Ryan/GeostrateRies(I) Project Tosco(1) <br /> Sierra Court,Suite 3 Project Number Tosco(Unocal)SS116981,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 /> MW-5(1.109080-05)Water Sampled 09/12/01 1645 Received 09/13/01 19 30 <br /> Ethanol ND 1000 ugll 1 1090069 09/19/01 09/19/01 EPA 8260B <br /> 1,2-Dibromoethane ND 20 <br /> 1,2-Dtchloroethane NO 20 " <br /> Di-isopropyl ether NO 20 " <br /> Ethyl tert-butyl ether NO 20 " <br /> Methyl tert-butyl ether NO 20 " <br /> Tert-amyl methyl ether NO 20 1. " <br /> Teri-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dtchloroethane-d4 108% 76-114 " <br /> Surrogate Toluene-d8 990% 88-110 " <br /> MW-6(L109080-06)Water Sam pled 09/12/01 13 30 Received 09/13/01 19 30 <br /> Ethanol ND 1000 ugA 1 1090069 09/19/01 09/19/01 EPA 8260B <br /> 1,2-Dibromoethane ND 20 " <br /> 1,2-Dtchloroethane ND 20 " <br /> rftpropyl ether ND 20 " <br /> tert-butyl ether ND 20 " <br /> Methyl tert-butyl ether ND 20 " <br /> Tett-amyl methyl ether ND 20 <br /> Tert-butyl alcohol NO 100 " <br /> Surrogate 12-Dtchloroethane-d4 106% 76-114 " <br /> Surrogate Toluene-d8 992% 88-110 " <br /> MW-7(LI09080-07)Water Sampled_09/13/01 1350 Received_09/13/01 19.30 <br /> Ethanol ND 2000 ugll 2 1090075 09/20/01 09/20/01 EPA 82608 <br /> 1,2-Dibromoethane ND 40 " <br /> 1,2-Dichloroethane 21 40 " <br /> Di-isopropyl ether NO 40 " <br /> Ethyl tert-butyl ether ND 40 " <br /> Methyl tert-butyl ether 200 40 " <br /> Tert-amyl methyl ether ND 40 " <br /> Tert-butyl alcohol ND 200 <br /> Surrogate 1,2-Dtchloroethane-d4 876% 76-114 " <br /> Surrogate Toluene-d8 964% 88-110 " <br /> al- San Carlos The results in this report apply to the samples analyzed in accordance with the chain o <br /> iZ Analytic J <br /> custody documeni This analytical report must be reproduced in its entirety <br /> Page 9 of 21 <br />