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1551 Indusinal Road <br /> Sequoia SanC(650) 32-%W <br /> 70 <br /> ''"`'l"� (650}232-9b00 <br /> wo Analytical WWseqFAX(650)232-9612 <br /> am <br /> wanv soquoialabs com <br /> *r-Ryan/Geostrategies(1) Project Tosco(1) <br /> Sierra Court,Suite J Project Number Tosco#5886, Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 12/06/01 16 51 <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-4D Ll 11140-05 Water Sam led 11/20/010915 Received 11/20/01 19 00 <br /> Ethanol ND 500 ug/l. I 1110097 11/28/01 11/28/01 EPA 8260B <br /> 1,2-Dibromoethane ND 10 n <br /> 1,2-Dichloroethane <br /> ND 10 <br /> Di-isopropyl ether ND 1 0 n " <br /> Ethyl tert-butyl ether ND 1 0 <br /> Methyl tert-butyl ether 23 10 " n1 <br /> Tert-amyl methyl ether ND 10 <br /> Tert-butyl alcohol ND 20 " <br /> -- " <br /> Surrogate 1,2-Dtchloroethane-d4 _ 102% - --70-130 - " <br /> Surrogate Toluene-d8 996% 70-130 <br /> MW-4S L1 11140-06)Water Sam led 11/201010855 Received 11/20/01 19 00 <br /> Ethanol ND 500 ugA 1 1110097 11/28/01 11/28/01 EPA 8260B <br /> 1,2-Dibromoethane ND 10 <br /> 1,2-Dichloroethane ND 10 <br /> Dropyl ether ND 10 " `^ <br /> E ert-butyl ether ND 10 <br /> Methyl tert-butyl ether 11 10 <br /> Tert-amyl methyl ether ND 1 0 <br /> Tert-butyl alcohol ND 20 <br /> " <br /> Surrogate 1,2-Dichloroethane-d4 103% 70-130 " <br /> Surrogate Toluene-d8 992% 70-130 " <br /> MW-5D L1 11140-07)Water Sampled 11/20/0108 22 Received 11/20/01 19 00 <br /> Ethanol ND 500 ug/I 1 1110097 11/28/01 11/28/01 EPA 8260B <br /> 1,2-Dibrornoethane ND 10 <br /> 1,2-Dichloroethane ND 10 <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl tert-butyl ether ND 10 " <br /> Tert-amyl methyl ether ND 1 0 <br /> Tert-butyl alcohol ND 20 " <br /> " <br /> Surrogate 1,2-Dtchloroethane-d4 104% 70-130 " <br /> Surrogate Toluene-d8 103% 70-130 " <br /> S 1a Analytical-San Carl 0S The results in this report apply to the samples analyzed in accordance ivith the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 10 of 23 <br />