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1551 Industrial Road <br /> j� Sequoia San Carlos CA 94070 <br /> �-►�'-Anal tica� - - — _ -_- _ -- - --- <br /> (650)232 9600 - <br /> FAX(650)232-9612 <br /> Y - — — °www sequotalabs corn — <br /> Gen]er-Ryan/Geostrategies(1) Project Tosco(1) <br /> 6747 Sierra Court,Suite J Project Number Tosco 115886,Stockton,CA Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 12/06/01 16 51 <br /> Volatile Organic $ Oxygenated_CornEP <br /> _pounds by A Method $260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Luntt Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-$1`(L111140-14)Water Sampled 11/19/0111:57 Received 11/20/01 19 00 r <br /> Ethanol—- __500._=ugA _,T-1-1110082-11/26/01--11/26/01 EPA 8260B- <br /> 1,2-Dibromoethane ND 10 " <br /> 1,2-Dichloroethane ND 10 " <br /> Di-isopropyl ether ND 10 <br /> Ethyl tert-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-Dichloroethane-d4 100% 70-130 " <br /> Surrogate Toluene-d8 103% 70-130 " <br /> MW-811)(L111140-15)Water Sam pled- 11/19101 12 30 Received 11/20/01 19 00 - <br /> Ethanol ND 500 ugA 1 1110089 11/26/01 11/26/01 EPA 8260B <br /> 1,2-Dibromoethane ND 10 " <br /> 1,2-Dichloroethane ND 10 " <br /> Dl-isopropyl ether ND 10 . <br /> Ethyl tert-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 12-Dichloroethane-d4 936% 70-130 " <br /> Surrogate Toluene-d8 102% 70-130 " <br /> MW-9S7(L111140-16)Water Sampled 11/19/0114 30 Received_11/20/01 19 00 <br /> Ethanol ND 500 ugll I 1110089 11/26/01 11/26/01 EPA 8260B <br /> 1,2-Dibromoethane ND 10 <br /> 1,2-Dichloroethane ND 10 " <br /> Di-isopropyl ether ND 10 11 " <br /> Ethyl tert-butyl ether ND 10 <br /> Methyl tert-butyl ether ND 10 "} " <br /> Teri-amyl methyl ether ND 10 - - <br /> Tert-butyl alcohol ND 20 <br /> Surrogate 1,1-Dichloroethane-d4 898% 70-130 " <br /> Surrogate Toluene-d8 103% 70-130 " <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analj.ed in accordance wuh the chain <br /> custody document This analytical report must be reproduced in its entirety <br /> I <br /> Page 13 of 23 <br />