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1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> a— ) (707)792-1865 <br /> 4Analytical FAX <br /> (707)792-0342 <br /> www sequoialabs com <br /> Gettler-Ryan/Geostrategtes(1) Project Unocal(4) <br /> 6747 Sierra Court, Suite l Project Number Former Unocal#0187,Stockton Reported <br /> Dublin CA,94568 Project Manager Deanna Harding 05/14/02 16 11 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Lunit Units Dilution Batch Prepared Analyzed Method Notes <br /> U-25 L205039-25 Water Sampled 05/08/02 12 23 Received 05/09/02 18-50 <br /> Tert-butyl alcohol ND 20 _ ug/I 1 2050028 05/14/02 05/14/02 EPA 8260B <br /> Methyl tert-butyl ether ND 1 0 <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 964% 70-130 " <br /> U-26 L205039-26 Water Sampled 05/08/02 18 22 Received 05/09/02 18 50 <br /> Tert-butyl alcohol ND 20 ug/l 1 2050028 05/14/02 05/14/02 EPA 8260B <br /> Methyl tert-butyl ether ND 1 0 ^ " <br /> Di-isopropyi ether ND 10 <br /> Ethyl tert-butyl ether ND 1 0 <br /> Tert-amyl methyl ether ND 10 " ^ <br /> Surrogate 1,2-Dichloroethane-d4 982% 70-130 " <br /> NP-1-22 L205039-27 Water Siim led 05/09/02 13 45 Received 05/09/02 18 50 <br /> Tert-butyl alcohol 370 40 ugA 2 2050034 05/15/02 05/15/02 EPA 8260B <br /> Methyl tert-butyl ether ND 2 0 <br /> Di-isopropyl ether ND 2 0 ^ " <br /> Ethyl tert-butyl ether ND 2 0 " <br /> Tert-amyl methyl_ether ND 2 0 <br /> Surrogate 1,2-Dichloroethane-d4 882% 70-130 " <br /> SNP-1-65-L205039=28 Water-Sam led`05/09102 14-25-Received-05/09102 18 50 — -�—�- --- --�- - R-05— <br /> Tert-butyl alcohol _ _ _ND _ _100=_ug/l5205003405/15/02 ,,05/15/02=_EPA 8260B_ __ <br /> Methyl ten-butyl ether ND 5 0 ^ " <br /> Di-isopropyl ether ND 5 0 <br /> Ethyl tert-butyl ether ND 5 0 ^ " <br /> Tert-amyl methyl ether ND 5 0 " ^ <br /> Surrogate 1,2-Dichloroethane-d4 916% 70-130 <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance ivith the chain a <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 20 of 30 <br />