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ry <br /> Road <br /> Sequoia a n Industrial al 4070 <br /> San Codas 23 94070 <br /> (650)232-4600 <br /> m fr Analytical4D FAX equoi lab 9612 <br /> � www sequoialabs com <br /> T <br /> -Ryan/Geostrategies(l) Project Tosco(1) <br /> Sierra Court,Suite J Project Number Tosco(Unocal)SS#6981,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 05/07/02 12 56 <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 /> VW-1 L203104-14 Water Sampled 0312010214.10 Received 03/21/02 18 40 <br /> Ethanol ND 500 ug/l 1 2030068 03/26/02 03/26/02 EPA 8260B <br /> 1,2-Drbromoethane 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 tert-butyl ether ND 2 0 " <br /> Tert-amyl methyl ether ND 2 0 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dichloroethane-d4 104% 70-130 " <br /> Surrogate Toluene-d8 976% 70-130 " <br /> VW-3(L203104-15)Water Sampled 03/20/02 15 40 Received 03/21/02 18 40 <br /> Ethanol ND 500 ug/l 1 2030068 03/26/02 03/26/02 EPA 8260B <br /> 1,2-Drbromoethane ND 20 " <br /> 1,2-Dichloroethane ND 2 0 <br /> ropyl ether ND 2 0 <br /> ENWert-butyl ether ND 2 0 " <br /> Methyl tert-butyl ether ND 2 0 " <br /> Tert-amyl methyl ether ND 2 0 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,1-Dichloroethane-d4 108% 70-130 <br /> Surrogate Toluene-d8 978% 70-130 " <br /> VW4(L203104-16)Water Sampled 03/20/02 13 00 Received 03/21/02 18 40 <br /> Ethanol ND 500 ugn 1 2030071 03/26/02 03/26/02 EPA 82608 <br /> 1,2-Drbromoethane 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 test-butyl ether 36 20 " <br /> Tert-amyl methyl ether ND 2 0 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1,2-Dichloroethane-d4 106% 70-130 " <br /> Surrogate Toluene-d8 994% 70-130 <br /> a 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 12 of 20 <br />