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Sequoia San an hal Road <br /> Carlos <br /> 94070 <br /> 23 <br /> (654)232 9604 <br /> Analvtical FAX(654)232 9612 <br /> � r <br /> FAX <br /> sequolalabs com <br /> Gettler-Ryan/Geostrateeies(1) Project Unocal(4) <br /> 6747 Sierra Court, Suite J Project Number Unocal SS45098 Stockton CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding _ 01/01/02 11 OS <br /> - -Volatile Organic Oxygenated Compounds by EPA Method 8260B - - - <br />-- -- --- - - - - Sequoia Analytical - San Carlos -- - - <br /> Reporting <br /> Analvte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> _MW-24S(L112030-31)Water Sampled 12/03/01 11 16 Received 12/04/01 17 50 <br />---I 2-Dibromoethane(EDB) — - - -ND Y -1 0-=-ug/1-.w- ---1 _ r 1120032 _ 12/07/01- _ 12/07/01 _ EPA 8260B— - <br /> 1,2-Dichloroethane ND 10 <br /> Benzene ND 10 <br /> Toluene ND 10 <br /> Ethylbenzene ND 10 <br /> Xvlenes(total) ND 10 <br /> Methvl tert-butvl ether ND 10 <br /> Di-isopropyl ether ND 10 " <br /> Ten-butyl alcohol ND 20 <br /> Ethyl ten-butyl ether ND 10 " <br /> Ten-amyl methyl ether ND 10 " <br /> Surrogate 1,1-Dichloroethane-d4 s 109% 70-130 <br /> Surrogate Toluene-d8 102% 70-130 " <br /> Surrogate 4-BFB w 101 % 70-130 " <br /> 117W-24D(L1 1 2 030-32)Water Sampled 12/03/011008 Received 12/04/01 17 50 - <br /> 1 2-Dibromoethane(EDB) ND 10- ug/I 1 1120032 12/07/01 12/07/01 EPA 8260B <br /> 12-Dichloroethane ND 10 " <br /> Benzene ND 10 " <br /> Toluene ND 10 " <br /> Ethylbenzene- -- - - - —=ND--_1 0 <br /> Xvlenes(total) ND 10 <br /> Methyl Cert-butyl ether <br /> Di-isopropyl ether ND 1 0 <br /> 'Pert-butyl alcohol ND 20 <br /> Ethyl tert-butyl ether ND 10 <br /> Teri-amyl methyl ether ND 10 <br /> Surrogate 1 2-Dichloroethane-d4 110% 70-130 " <br /> Surrogate Toluene-d8 992% 70-130 " <br /> Surrogate 4-BFB 98 0% 70-130 " <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain o <br /> 0 <br /> custod>>document This analytical report must be reproduced in its entireq <br /> Page 24 of 34 <br />