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Sequo• kn C Industrial Road <br /> ia San Carlos CA 94070 <br /> 00 <br /> a_ _� <br /> Analytical (650)232-9612 <br /> FAX(650)232 9612 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategies(1) Project Unocal(4) L208033 <br /> 6747 Sierra CourL Suite] Project Number Former Unocal#10187,Stockton Reported <br /> Dublin CA, 94568 Project Manager Deanna Harding 08/29/0207 <br /> 10 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U-5(L208033-06)Water Sampled 08/12/02 13 35 Received 08/14/02 19 55 <br /> Tert-butyl alcohol ND 20 ugll 1 2080016 08/15/02 08/15/02 EPA 8260E r <br /> Methyl tert-butyl ether ND 10 "^ " <br /> Di-isopropyl ether ND 10 ^ " <br /> Ethyl tert-butyl ether ND 10 <br /> Tert-amyl methyl ether ND 10 ^ <br /> Surrogate 1,2-Dtchloroethane-d4 114% 70-130 <br /> U-6 (L208033-07)Water Sampled 08/32/02 14 10 Received 08/14/02 1955 _ <br /> Tert-butyl alcohol ND 20 ug/1 ti 1 2080016 08/15/02 08/15/02 EPA 8260B <br /> Methyl tert-butyl ether ND 10 <br /> Di-isopropyl ether ND 10 <br /> Ethyl tert-butyl ether ND 10 " <br /> Tert-amyl methyl ether ND 10 " <br /> Surrogate 1,2-Dtchloroethane-d4 118% 70-130 " <br /> U-7(L208033-08)Water Sam pled 08/12/02 16 25 Received 08/14/02 19 55 - r <br /> Tert-butyl alcohol ND 20 ug/1 1 2080016 08/15/02 08/15/02 EPA 8260B <br /> Methyl lert-butyl ether ND 10 " <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Tert-amyl methyl ether ND 1 0 " <br /> Surrogate 1,2-Dtchloroethane-d4 113% 70-130 " <br />=U=8(L208033-09)Wnter�Sampled 08/14/02-11 50=Received 08/14/02 1955 - - - --- - <br /> Tert-butyl alcohol ND 20 ug/1 1 2080016 08/15/02 08/15/02 EPA 8260B <br /> Methyl Cert-butyl ether -- -- }-— ---ND - - - 1 0 - ^--- --� -- =- — =n =-- -^ _---- --- - - <br /> Di-isopropyl ether ND 10 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Tert-amyl methyl ether ND 10 <br /> Surrogate 1,1-Dtchloroethane-d4 114% 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 otherwise stated results are reported on a wet weight basis <br /> This analytical report mast be reproduced in as entirety <br /> Page 5 of 36 <br />