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1551 Industnal Road <br /> San Carlos CA 94070 <br /> Sequoia (650)232-9600 <br /> FAX(650)232-9612 <br /> iRW Analytical www sequ4iaiabsCOm <br /> ler-Rvan/G eostrategteS(1) Project Unoca)(4) <br /> 6747 Sierra Court Suite J Project Number Unocal SS#5098,Stockton CA Reported <br /> Dublin CA 94568 Project Manager Deanna Harding 01/01/02 ]1 OS <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analvie Result Lunn Units Ddutron Batch Prepared Analyzed Method Notes <br /> MW-11 (L112030-13)Water Sampled 12/04/01 12 36 Received 12/04/01 17 50 <br /> 1 2-Dibromoethane(EDB) ND 40 ugA 40 1120032 12/07/01 12/07/01 EPA 8260B <br /> 12-Dichloroethane ND 40 <br /> Benzene 5300 40 " <br /> Toluene <br /> 900 40 <br /> Ethvlbenzene 320 40 " <br /> Xylenes(total) 1300 40 <br /> Methyl ten-butyl ether ND 40 <br /> Di-isopropyl ether ND 40 <br /> Teri-butv]alcohol ND 800 " <br /> Ethyl ten-butvl ether ND 40 <br /> Teri-amyl methyl ether ND 40 " <br /> Surrogate 1,2-Dichloroethane-d4 110% 70-130 <br /> Surrogate Toluene-d8 103% 70-130 " <br /> Surrogate 4-BFB 104% 70-130 " <br /> -12 (L112030-14)Water Sampled 12104/010858 Received 12/04/01 17 50 <br /> -Dibromoethane(EDB) ND 2 0 ugA 2 1120027 12/07/01 12/07/01 EPA 82608 <br /> 1,2-1) ND 20ichiaroethane <br /> Benzene 200 2 0 <br /> 3.9 2 0 <br /> Toluene <br /> Ethylbenzene 140 2 0 <br /> Xylenes(total) 24 2 0 <br /> Metbyl ter[-butvl ether ND 2 0 n " <br /> Di-isopropyl ether ND 20 <br /> Teri-butyl alcohol ND 40 <br /> Ethyl ten-butyl ether ND 2 0 <br /> Tert-amyl methyl ether ND 2 0 <br /> Surrogate 1,2-Dichloroethane-d4 106% 70-130 <br /> Surrogate Toluene-d8 <br /> 106% 70-130 " <br /> Surrogate 4-BFB <br /> 101 % 70-130 " <br /> Awk <br /> nota Analytical- San Carlos The results in thrs report apply to the samples analysed in accordance ivrth the chain of <br /> custody document This analytical report must he reproduced in its entirety <br /> Page 15 of 34 <br />