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Road <br /> Sequoia an Carlo Industrial 4070 <br /> 41) o <br /> San Carlos CA ggp70 <br /> ice► Analytical FAX(650)212961(654)232 9612 2 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategies(I) Project Unoca](4) L208033 <br /> 6747 Sierra Court, Suite 1 Project Number Former Unocal#0187 Stockton Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 08/29/02 07 10 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Lana Units Dilution Batch Prepared Analyzed Method /Votes <br /> U-13(L208033-14)Water Sampled 08/14/02 15 35 Received 08/14/02 19 55 <br /> Tert-butyl alcohol _ 23 20 ugA l 2080016 08/15/02 08/15/02 EPA 8260E <br /> Methyl tert-butyl ether ND 1 0 " <br /> Di-isopropyl ether ND 10 <br /> Ethyl cert-butyl ether ND 1 0 <br /> Tert-amyl methyl ether ND 1 0 <br /> Surrogate 1,2-Dichloroethane-d4 112% 70-130 " <br /> U-14(L208033-15)Water Sampled 08/12/02 15 00 Received 08/14/02 19 55 <br /> Tcrt-butyl alcohol ND 20 ugll 1 2080016 08/15/02 08/15102 EPA 8260B <br /> Methyl tent-butyl ether ND 1 0 <br /> Di-isopropyl ether ND 1 0 <br /> Ethyl ten-butyl ether ND 10 ^ <br /> Teri-amyl methyl ether ND 10 <br /> Surrogate 1,2-Dichloroethane-d4 111 % 70-130 " <br /> U-15(L208033-16)Water- Sampled 08/12/02 15 46 Received 08/14/02 19 55- - <br /> Tert-butyl alcohol ND 20 ug/1 1 2080016 08/15102 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-Dichloroethane-d4 113% 70-130 " " <br />—U-16(L208033-17)Water=Sampled 08112/02-1710-Received 08/]4/02-1955 -- -- <br /> Tert-butyl alcohol ND 20 ug/1 - ' 1 2080016 08/15/02 08/15/02 EPA 8260E <br /> -Methyl Cert-bury{ether- - '- _ __T�ND;�_s_ 1-0- _ - T <br /> Di-isopropyl ether ND ] 0 " <br /> Ethyl tert-butyl ether ND 10 <br /> Tert-amyl methyl ether ND 10 " ^ <br /> Surrogate 1,2-Dichloroethane-d4 114% 70-130 " <br /> Sequoia Analytical -San Carlos The results to this report apply to the samples analyzed in accordance with the chain o <br /> custody document Unless othenvtse stated,results are reported an a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 7 of 36 <br />