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1553 Indusinal Road <br /> ,�j� Sequoia San Carlos CA 94074 <br /> ��''"� (650)232 4600 <br /> �w Analytical wwseqFAX(650)232-9612 <br /> om <br /> www sequoielabs tom <br /> ler-Ryan/Geostrategtes(1) Project Unoca](4) <br /> 6747 Sierra Court.Suite J Project Number Unocal SS45098 Stockton CA Reported <br /> Dublin CA 94568 Protect 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 Analyzed Method Notes <br /> 119W-8D(L112030-09)Water Sampled 12/04/01 14 41 Received 12/04/01 17 50 <br /> 1 2-Dibromoethane(EDB) ND 50 ugR 5 1120027 12/07/01 12/0710] EPA 8260B <br /> 1 2-Dichloroethane ND 50 <br /> Benzene 320 50 <br /> Toluene 150 5 0 <br /> Ethvlbenzene 190 50 <br /> Xvlenes(total) 790 50 n <br /> Methyl tert-butyl ether ND 50 <br /> Di-isopropvl ether ND 50 <br /> Tert-butyl alcohol ND 100 <br /> Ethyl tert-butyl ether ND 50 " n <br /> Teri-amyl methvl ether ND 50 <br /> Surrogate 12-Drchloroethane-d4 992% 70-130 " <br /> Surrogate Toluene-d8 104% 70-130 " <br /> Surrogate 4-BFB 104% 70-130 " <br /> Aft-9(L112030-10 Water Sam led 12/03/01 15 05 Received- 12/04/01 17 50 <br /> -Dibromoethane(EDB) ND 10 ug/1 1 1120027 12/07/01 12/07/01 EPA 8260E <br /> 12-Drchloroethane ND 10 <br /> Benzene ND 10 <br /> Toluene 12 10 " <br /> Ethylbenzene 16 10 <br /> Xylenes(total) 14 10 <br /> Methyl Cert-butyl ether ND 10 <br /> Di-isopropyl ether ND 10 <br /> Tert-butyl alcohol ND 20 " <br /> Ethyl tert-butyl ether ND 10 <br /> Tert-arnyl methyl ether ND 10 " <br /> Surrogate 1,2-Drchloroethane-d4 105% 70-130 <br /> Surrogate Toluene-d8 104% 70-130 <br /> Surrogate 4-BFB 976% 70-130 <br /> Ask <br /> vola Analytical- San Carlos The results in this report apply to the samples analyed in accordance wish the chain of <br /> custody document This analytical report must be reproduced in its entirety <br /> page 13 of 34 <br />