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l Road <br /> ` Sequoia an nous x94070 <br /> Sen C(650 23 94070 <br /> (651))232 9600 <br /> qur Analytical FAX(650)232-96 <br /> www sequoialabs coil, ra <br /> Gettler-Ryan/GeostrategtCS(I) Project Unocal(4) <br /> 6747 Sierra Court Suite 3 Protect Number Former Unocal SS#12859 Stockton,CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 09/06/01 12 14 <br /> Volatile Organic 8 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 /> _NJW-17 (L108120-18)X%?ater Sampled 08/16/01 17041 Received 08/17/01 18 55 _ <br /> 1 2-Dibromoethane ND 20 ugll 1 1080101 08/23/01 08/23/01 EPA 8260B <br /> 1,2-Dichloroethane 160 20 " <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 " <br /> Methyl tert-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Ten-butyl alcohol ND 100 <br /> Sur;ogate 1,2-Dichloroethane-d4 990% 76-114 " <br /> Surrogate Toluene-d8 936% 88-110 " <br /> 1\11311-18 (1-108120-19)Water S-impled 08/16/01 16 25 Received 08/17/01 18 55 T. <br /> 1 2-Dibromoethane ND 20 ug11 1 1080101 08/24/01 08/24/01 EPA 82608 <br /> 1,2-Dichloroethane 47 20 <br /> Di-isopropyl ether ND 20 " <br /> Ethyl tert-butyl ether ND 20 <br /> --Methyl tent-butyl ether _ _ ND _ 20 <br /> Ten-amyl methyl ether ND 20 " <br /> Teri-butyl alcohol ND 100 " <br /> 5w r ogate 1 2-Dichloroethane-d4 858-% 76-114 " <br /> Surrogate Toluene-d8 944%% 88-110 " <br /> M\i1'-19 (L 108120-20)Water Sam pled 08/1?M] 12-25 Received T08/17/01-]8 55 <br /> —1 2-Dibromoethan_e_ ND _ _ 2 0 ug/l 1_ 1.080101 08/24/0108/24/01 EPA_8260B-- __ <br /> -- 1,2-Dichloroethane ---— ----ND-2 <br /> 25 20 ---„ " ---- 1---- " ----— ---- -- <br /> - Di-isopropyl ether -----==-- — ---NDS 2 0 <br /> Ethyl tett-butyl ether ND 20 " <br /> Methyl ten-butyl ether ND 20 " <br /> Tert-amyl methyl ether ND 20 " <br /> Tert-butyl alcohol ND 100 " <br /> Surrogate 1 2-Dichloroethane-d4 878% 76-114 " <br /> Surrogate Toluene-d8 95 4% 88-110 " <br /> Sequoia Analytical - San Carlos The results in this report apply to the samples analyzed in accordance with the charn <br /> custody document This analytical report must be reproduced in us entirety <br /> Page 4 of 22 <br />