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1559 indusinal Road <br /> 94070 <br /> Sequoia San Carlos 23 -96W <br /> (650}232-9600 <br /> a- ) <br /> W Analytical FAX umalabsco50) 2 <br /> www soquoialabs com <br /> ler-Ryan/Geostrategies(1) Project Unocal(4) <br /> 747 Sterna Court. Suite J Project Number Unocal SS#5098,Stockton CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 01/01/02 1105 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reponmg <br /> Analyte Result Limit Units Dilution Batch Prepared Analvzed Method Notes <br /> MW4(L112030-OS)Water Sampled M04/011540 Received 12/04/01 17 50 <br /> 1 2-Dibromoethane(EDB) ND 13 ugA 1333 1120027 12/07/01 12/07/01 EPA 8260B <br /> 12-Dichloroethane ND 13 " <br /> Benzene <br /> 1700 13 <br /> Toluene 390 13 <br /> Ethylbenzene 600 13 <br /> Xylenes(total) 2700 13 <br /> Methyl tert-butyl ether ND 13 » » » <br /> Di-isopropyl ether ND 13 <br /> Teri-butyl alcohol ND 270 <br /> Ethvl tert-butyl ether ND 13 <br /> Tert-amvl methyl ether ND 13 " <br /> " <br /> Surrogate 1,1-Dichlorae[hane-d4 992% 70-130 » » » <br /> Surrogate Toluene-d8 102% 70-130 I , <br /> Surrogate 4-BFB 105% 70-130 " <br /> AIK-5(L112030-06)Water Sampled 12/03/01 14 20 Received 12/04/01 17 50 <br /> - ibromoethane(EDB) ND 10 ugA 1 1120027 12/07/01 12/07/01 EPA 8260B <br /> 12-Dichloroethane ND 10 <br /> 10 » » <br /> Benzene ND " <br /> Toluene 14 10 <br /> £thvlbenzene ND 10 <br /> Xylenes(total) 1.2 10 " w <br /> Methyl tert-butyl ether ND 10 <br /> Di-isopropyl ether ND 10 <br /> Tert-butyl alcohol ND 20 n » <br /> Ethyl tert-butyl ether ND 1 0 <br /> Teri-amyl methyl her ND 1 0 <br /> Surrogate 1,2-Dichloroethane-d4 940% 70-130 " <br /> Surrogate Toluene-d8 102% 70-130 'n <br /> Surrogate 4-BFB 976% 70-130AdIL <br /> " <br /> nota Analytical- San Carlos The results in this report apply to the samples analyzed in accordance with the chain of <br /> cusiody document This analytical report must be reproduced in its entire[y <br /> Page 1 l of 34 <br />