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1551 lndostnal Road <br /> j� Sequoia San Carlos CA94070 <br /> 23 <br /> {650)232-960-9600 <br /> FAX(650)232-9612 <br /> � F Analytical www-uquoialabscom <br /> ler-Rvan/Geostratcgies(1) Project Unoca](4) <br /> 6747 Sierra Court,Suite a Project Number Unocal SS115098,Stockton CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 01/01/02 11 05 <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analvte Result Limit Units Dilution Batch Prepared Analvzed Method Notes <br /> PIMP-25S(L112030-33)Water Sampled 12/04/01 09 35 Received 12/04/01 17 50 <br /> 1 2-Dibromoethane(EDB) ND 1 0 ugA 1 1120032 12/07/01 12/07/01 EPA 82608 <br /> 12-Dichloroethane ND 10 <br /> Benzene ND 10 <br /> Toluene ND 10 <br /> Ethylbenzene ND 10 <br /> Xylenes(total) ND 1 0 " <br /> Methyl tert-butyl ether ND 1 0 <br /> Di-isopropyl ether ND 1 0 " <br /> Ten-butyl alcohol ND 20 <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Ten-amyl methyl ether ND 1 0 " <br /> Surrogate 1,2-Dichloroethane-d4 112% 70-130 " <br /> Surrogate Toluene-d8 102% 70-130 " <br /> Surrogate 4-BFB 94 8% 70-130 " <br /> Adft-25D(L112030-34)Water Sam pled 12/04/01 10 10 Received 12/04/01 17 50 <br /> -Dibromoethane(EDB) ND 50 ugA 50 1120032 12/07/01 12/07/01 EPA 82608 <br /> 12-Dichloroethane ND 50 <br /> Benzene 2500 50 <br /> Toluene 5800 50 <br /> Ethylbenzene 1300 50 <br /> Xvlenes(total) 5900 50 <br /> Methyl Cert-butyl ether ND 50 " <br /> Di-isopropyl ether ND 50 <br /> Tert-butyl alcohol ND 1000 <br /> Ethyl tert-butyl ether ND 50 " <br /> Ten-amyl methyl ether ND 50 <br /> Surrogate 1,2-Dichloroelhane-d4 108% 70-130 " <br /> Surrogate Toluene-d8 101 % 70-130 " <br /> Surrogate 4-BFB 108% 70-130 <br /> AML <br /> INquoia Analytical- San Carlos The results in this report apply to the samples analyzed in accordance ivirh the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> Page 25 of 34 <br />