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1551 Industrial Road <br /> ��� Sequoia San Carlos 23 -96 0 <br /> '-�''`' (650)232-960 <br /> Wo Analytical ,wwseqFAX(630)232-9612612 <br /> www soquoialabs tOm <br /> r-RyanlGeostrategtes(1) Project Unocal(4) <br /> 6747 Sierra Cour.Suite 3 <br /> Project Number Unocal SS#5098 Stocl ion 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 /> MVV-21S(L112030-25)Water Sampled 12/03/01 07 20 Received 12/04/01 17 50 <br /> 1 2-Dibromoethane(EDB) ND 1 0 ug/l 1 1120032 12/07/01 12/07/01 EPA 8260B <br /> 12-Dichloroethane ND 10 <br /> Benzene ND 10 " <br /> Toluene ND 10 <br /> Ethvlbenzene ND 1 0 " <br /> Xylenes(total) ND 1 0 <br /> Methyl tert-butyl ether ND 1 0 " " - <br /> Di-isopropyl ether ND 1 0 <br /> Tert-butyl alcohol ND 20 n n <br /> Ethyl ten-butyl ether ND 1 0 <br /> Teri-amyl methvl ether ND 1 0 " <br /> Surrogate 1,2-Dichloroethane-d4 107% 70-130 <br /> Surrogate Toluene-d8 100% 70-130 " <br /> Surrogate 4-BFB 103% 70-130 „ <br /> Do 1D L112030-26 Water Sampled 12/03/010753 Received 12/04/01 17 50 <br /> l - ibromoethane(EDB) ND 1 0 ug/I 1 3120032 12/07/01 12/07/01 EPA 8260B <br /> 12-Dichloroethane ND 10 <br /> Benzene ND 10 <br /> Toluene ND 10 <br /> Ethylbenzene ND 10 <br /> Xylenes(total) ND 1 0 n " <br /> Methyl tent-butyl ether 3 8 1 0 <br /> Di-isopropyl ether ND 10 <br /> Tent-butyl alcohol ND 20 <br /> Ethyl tert-butyl ether ND 1 0 <br /> Teri-amyl methyl ether ND 1 0 " " <br /> Surrogate 1,2-Dichloroethane-d4 105% 70-130 <br /> Surrogate Toluene-d8 992% 70-130 " <br /> Surrogate 4-BFB 102% 70-130 <br /> AIML <br /> oia Analytical- San Carlos The results in this report apply to the samples analyed in accordance with the chain of <br /> custody document This analytical report must be reproduced to its entirety, <br /> Page 21 of 34 <br />