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Ind <br /> Sequoia Ola 1n C Tios nal Road <br /> 4D (650) <br /> San Carlos CA 94070 <br /> �WAnalytical 2329600 <br /> FAX(650)232 4612 <br /> ww"sequoialabs com <br /> Gen]er-Ryan/Geostrategies(I) Project Unocal(4) L208029 <br /> 6747 Sierra Court. Suite 1 Project Number Former Unocal 42859 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/28/02 11 23 <br /> Volatile Organic 8 Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analvte Result Limn Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-11 (L208029-11)Water Sam led 08/10/02 14 50 Received 08/11/02 11 30_ R-05 <br /> -1 2-Dibromoethane ND 10 ug/I .10 2080019 08/19/02 08/20/02 EPA 8260B <br /> 12-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 /> TertIbutyl alcohol ND 200 " <br /> Surrogate 1,2-Dichloroethane-d4 968% 70-130 1 11 " <br /> Surrogate Toluene-d8 106% 70-130 " <br /> MW-12(11-208029-12)Water Sampled 08/10/02 13 37 Received 08/11/02 11 30 -_ <br /> 1 2-Dibromoethane _ ND 1 0 ug/l 1 2080019 08/19/02 08/20/02 EPA 8260B <br /> 12-Dichloroethane ND 10 1 ^ <br /> Di-isopropyl ether NO 10 ^ " <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 1,2-Dichloroethane-d4 In6% 70-13n <br /> Surrogate Toluene-d8 102% 70-130 " <br /> MW-13(L208029-13)Water Sampled 08/10/02 10 30 Received 08/111/02 11 30 _ <br />--1 2-Dibromoethane-- - ---.ND---] O�ug/l�l_ -_2080019- X08/19/02—1 -08/20/02--EPA 82601312-Dichloroethane ND 10 <br />- Di-isopropyl ether -- - ,ter— - — - -ND = - - 10 - <br /> - <br /> Ethyl tent-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 106% 70-130 11 ^ <br /> Surrogate Toluene-d8 102% 70-130 " <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the chain o <br /> custody document Unless orhenr tse slated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 3 of 25 <br />