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a_ _� (1551 Industrial Road <br /> Sequoia San Carlos,CA 94070 <br /> Analytical <br /> 6-50)2329600 <br /> FAX(650)232-9612 <br /> www sequoialabs Com <br /> Gettler-Ryan/Geostrategies(1) Project Unoca](4) L208033 <br /> 6747 Sierra Court, Suite J 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 I t <br /> Analyte Result limit Units Dilution Batch Prepared Analyzed Method Notes <br /> U-21 (L208033-22)Water Sampled 08/13/02 15 20 Received 08/14/02 19 55 <br /> Tert-butyl alcohol -" _ 24- _ 20 ug/l I 2080017 08/16/02 08/17/02 EPA 8260E <br /> Methyl tert-butyl ether ND 10 " ^ <br /> Di-isopropyl ether 29 10 " <br /> Ethyl Cert-butyl ether ND 10 <br /> Ten-amyl methyl ether ND 1 0 <br /> Surrogate 1,2-Dichloroethane-d4 113% 70-130 " <br /> U-22 (L208033-23)Water Sampled 08/13/02 11 07 Received 08/14/02 19 55 _ <br /> Ten-butyl alcohol ND 20 _ ug/i 1 2080017 08/16/02 08/17/02 EPA 8260B <br /> Methyl ten-butyl ether ND 10 <br /> Di-isopropyl ether ND 10 ^ <br /> Ethyl tent-butyl ether ND 10 <br /> Ten-amyl methyl ether ND 10 ^ <br /> Surrogate 1,2-Dichloroethane-d4 112% 70-130 " <br /> U-23(L208033-24)Water Sampled 08/13/02 11 53 Received 08/14/021955 - <br /> Ten-butyl alcohol ND 20 ugA 1 2080017 08/16/02 08/17/02 EPA 8260B <br /> Methyl tert-butyl ether ND 10 <br /> Di-isopropyl ether 21 10 ^ <br /> Ethyl tert-butyl ether ND 10 ° ^ <br /> Ten-amyl methyl ether ND 10 " <br /> Surrogate 1,2-Dichloroethane-d4 115% 70-130 " <br />�U-240208033=25)Wa`tFr�Sampled_08/13102 09`33�Re eeived-08/14/02-19-55� <br /> r:Tert-butyl alcohol _ _ _ _ _ _ND T ,_ _ 20 _ _ugA v, _ 1 2080017_T08/16/0208/17/02 EPA 8260B_ <br /> Methyl tert-butyl ether ND 10 <br /> Di-isopropyl ether ND 10 <br /> Ethyl tent-butyl ether ND 10 <br /> Tert-amyl methyl ether ND 10 <br /> Surrogate 1,2-Dichloroethane-d4 112% 70-130 " <br /> Sequoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chairs o <br /> custody document Unless otherivise stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 9 of 36 <br />