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1551 <br /> strial <br /> ad <br /> Sequoia anCarlouCA94 70 <br /> San Carlos CA 94070 <br /> Analytical <br /> (D (650)232-9600 <br /> FAX 232-961' <br /> www sequosquoialahs wm <br /> Gettler-Ryan/Geostrategies(I Protect Unocal(4) <br /> 6747 Sierra Court. Suite J Project Number Unocal SS#5098 Stockton CA Reported <br /> Dublin CA,94568 Protect Manager Deanna Harding 01/01/02 11 05 <br /> _ Volatile Organic Oxygenated Compounds by EPA Melhod 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analvzed Method Notes <br /> MW-13(L112030-15)Water Sampled 12/03/01 10 15 Received 12/04/01 17 50 <br /> 1 2-Dibromoethane(EDB) _ - ND 10 uSA_ 1 1120027 12/07/01 12/07/01 EPA 8260B <br /> 1 2-Dichloroethane _ _ __ -ND_— I <br /> Benzene ND 10 <br /> Toluene ND 10 " <br /> Ethylbenzene ND 10 " <br /> Xylenes(total) ND 10 " <br /> Methyl tert-butvl ether 3 1 10 <br /> Di-isopropyl ether ND 10 <br /> Tert-butyl alcohol ND 20 " <br /> Ethyl tett-butvl ether ND 10 <br /> Tert-amyl methvl ether ND 10 " <br /> Surrogate 1,2-Dich1oroethane-d4 , 106% 70-130 <br /> Surrogate Toluene-d8 103% 70-130 ' <br /> Surrogate 4-BFB 988% 70-130 " <br /> MW-14(L112030-15)Water Sampled 12/03/01 1540 µReceived 12/04/01 17.50 - <br /> 1 2-Dibromoethane(EDB) ND 1 0 uSA 1 1120027 12/07/01 12/07/01 EPA 8260E <br /> 12-Dichloroethane ND 10 <br /> Benzene ND 10 " ~ <br /> Toluene ND 10 <br /> Ethylbenzene <br /> Xylenes(total) ND 10 <br /> -Methyl_teri-butyl_ether —ND —] 0_`_ <br /> Di-isopropyl ether � - - - - - - ND 10 <br /> - -^ ----�-- - "- - - ^ - - - � -- ---- - -- - <br /> Tert-butyl alcohol--= -,- - ND- - -20 <br /> Ethyl tert-butyl ether ND 10 <br /> Ten-amyl methvl ether ND 10 ~ " <br /> Surrogate 1,2-Dichloroethane-d4 110% 70-130 " <br /> Surrogate Toluene-d8 102% 70-130 " <br /> Surrogate 4-BFB 952% 70-130 " <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples onabaed to accordance with the chain <br /> custody document This analytical reporr must be reproduced in its entirery <br /> Page 16 of 34 <br />