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(D (651551 lndustnal Road <br /> 0)Sequoia San Carlos CA 94070 <br /> 232 9600 - <br /> qIW AnalyticaI FAX(650)232-9612 <br /> www sequoialabs corn <br /> Gettler-Ryan/Geostratep-ies(I) Project Tosco(l) <br /> 6747 Sierra Court,Suite J Project Number Tosco(Unocal)SS#16981,Slockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 12/27/01 09 39 <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 (L112085-11)Water Sampled 12/12/01 1450 Received 12/13/011940 <br /> Ethanol ND 500 ug/1 1 1120086 12/21/01 12121/01 EPA 8260B <br /> 112-Dibromoethane ND 10 <br /> 1,2-Dichloroethane ND 1 0 <br /> Di-isopropyl ether ND 10 <br /> Ethyl Cert-butyl ether ND 10 <br /> Methyl tert-butyl ether ND 10 " <br /> Tert-amyl methyl ether ND 10 <br /> Tert-butyl alcohol ND 20 " <br /> Surrogate 1,2-Dtchloroethane-d4 846% 70-130 <br /> Surrogate Toluene-d8 104% 70-130 " <br /> VW-3(L112085-12)Water Sampled 12/12/01 16 20 Received 12/13/01 19 40 <br /> Ethanol ND 500 ug/1 1 1120086 12/21/01 12/21/01 EPA 8260B <br /> 1,2-Dibromoethane ND 10 " <br /> 1,2-Dtchloroethane ND 10 <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether ND 1 0 <br /> Tert-amyl methyl ether ND 1 0 " ^ <br /> Tert-butyl alcohol ND 20 " ^ <br /> Surrogate 1,2-Dtchloroethane-d4 848% 70-130 " <br /> Surrogate Toluene-d8 101 % 70-130 " <br /> I%IW-1 (LI 12085-13)Water Sam celled 12/13/01 10 45 Received 12/13/01 19 40 <br /> Ethanol ND 500 ugA 1 1120086 12/21/01 12/21/01 EPA 8260B <br /> 1,2-Dibromoethane ND l0 <br /> 1,2-Dichloroethane ND 10 " <br /> Di-isopropyl ether ND 1 0 " ^ <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl ten-butyl ether ND 1 0 " <br /> Tert-amyl methyl ether ND 1 0 " <br /> Tert-bury]alcohol ND 20 ^ <br /> Surrogate 1,2-Dtchloroethane-d4 942 % 70-130 <br /> Surrogate Toluene-d8 101 % 70-130 " <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 he reproduced in its entirety <br /> Page 11 of 22 <br />