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oad <br /> Sequoia an Carlos CA 070 <br /> San Carlos CA 94071 <br /> Allal3't1Ca1 = — _ - -- - - ___ -- - _ -- - _ - _ (650)232-9610 - <br /> FAX(650)232-9612 <br /> www sequoialabs cam <br /> Gettler-Ryan/Geostrategies(I) Project Tosco(1) <br /> 6747 Sierra Cour[,Suite J Project Number Tosco#5886,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 12/06/01 16 51:1, <br /> _ Volatile Organic S Oxygenated-Compollnds-by,EPA-Method 8260B -- <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte - _ - Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1(L111140-02)Water Sampled 11/20/0) 10 56Received 11/20/01 19 00 <br /> _ <br /> Ethanol-T� -- -�--- — -- -ND - --7100- --ig/l ` -—1429T111008911/28/01--31128101 --EPA 8260B= - -- <br /> 1,2-Dibromoethane ND 14 <br /> 1,2-Dichloroethane ND 14 <br /> Di-Isopropyl ether ND 14 " <br /> Ethyl tert-butyl ether ND 14 <br /> Methyl tert-butyl ether 2500 14 " <br /> Tert-amyl methyl ether ND 14 <br /> Tert-butyl alcohol ND 290 " <br /> Surrogate 1,2-Dichloroethane=d4— - - - -- 116%- 70-130 " <br /> Surrogate Toluene-d8 100% 70-130 " <br /> MW-2(L)11140-03)Water Sampled 11/20/01 11 30 Received 11/20/01 19.00 <br /> Ethanol ND 12000 ug/l 25 1110089 11/28/01 11/18/01 EPA 8260B <br /> 1,2-Dlbromoethane ND 25 " <br /> 1,2-Dichloroethane ND 25 " <br /> Di-isopropyl ether ND 25 <br /> Ethyl tert-butyl ether ND 25 <br /> Methyl tent-butyl ether 4000 25 <br /> Tert-amyl methyl ether ND 25 <br /> Tert-butyl alcohol ND 500 <br /> Surrogate 1 2-Dichloroethane-d4 105% 70-130 " <br /> Surrogate Toluene-d8 101 % 70-130 <br /> MW-3 L111140-04)Water Sampled 11/20/01 12 05 Received 11/20/01 19.00 <br /> Ethanol ND 20000 ug/l 40 1110089 11/28/01 11128/01 EPA 8260B <br /> 1,2-Dibromoethane ND 40 " " " " <br /> 1,2-Dichloroethane ND 40 " " <br /> Di-isopropyl ether ND 40 " <br /> Ethyl tert-butyl ether ND 40 <br /> Methyl teri-butyl ether 6800 40 " <br /> Tert-amyl methyl ether ND 40 " <br /> Tert-butyl alcohol ND 800 " <br /> Surrogate 1,2-Dichloroethane-d4 108% 70-130 " <br /> Surrogate Toluene-d8 988% 70-130 " <br /> AdIlk <br /> Sequoia Analytical -San Carlos The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 9 of 23 <br />