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i <br /> 1551 Industrial Road <br /> Seq • San Carlos 23 94070 <br /> -%M <br /> (DFAX uois (65U)z3z-9600(650)232-9612 <br /> 14W Analytical www scqooialabscom <br /> ler-Rvan/Geostratepies(1) Protect Unocal(4) <br /> 6747 Sierra Court-Suite] Protect Number Unocal SS45098 Stockton CA Reported <br /> Dublin CA 94568 Prolw Manager Deanna Harding 01/01/02 11 OS <br /> Volatile Organic Oxygenated Compounds by EPA Method 8260B <br /> Sequoia Analytical - San Carlos <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-14A (1.112030-17 Water Sampled 12/03/0116 10 Received 12/04/01 17 50 <br /> 1 2-Dibromoethane(EDB) ND 1 0 ugA 1 1120027 12/07/01 12/07/01 EPA 8260E <br /> 12-Dichloroethane ND 10 " <br /> Benzene <br /> ND 10 <br /> „ <br /> Toluene ND 10 " <br /> Ethylbenzene ND 10 <br /> Xylenes(total) ND 10 <br /> Methyl tert-butv]ether ND 10 <br /> Di-isopropyl ether ND 10 <br /> Teri-butyl alcohol ND 20 <br /> Ethyl tett-butvl ether ND 10 <br /> Tert-amyl methvl ether ND 10 " <br /> Surrogate 1,2-Dichloroethane-d4 108% 70-130 " <br /> Surrogate Toluene-d8 100% 70-130 " <br /> Surrogate 4-BFB 940% 70-130 <br /> -15(1-112030-1$)Water Sam led 12/03/010925 Received 12/04/01 17 50 <br /> -Dibromoethane(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 /> 10 " <br /> Toluene ND <br /> Ethylbenzene ND 10 <br /> Xylenes(total) ND 10 <br /> Methyl tert-butyl ether ND 10 <br /> Di-isopropyl ether ND 10 <br /> Tert-butyl alcohol ND 20 <br /> Ethyl Cert-butyl ether ND 10 <br /> Tert-amyl methyl ether ND 10 " <br /> Surrogate 1,1-Drchloroethane-d4 <br /> 109% 70-130 " <br /> Surrogate Toluene-d8 104% 70-130 <br /> Surrogate 4-BFB <br /> 948% 70-130 " <br /> Alk <br /> uola Analytical -San Carlos The results to this report apply to the samples onalyed in accordance with the chain of <br /> custody document This analytical report must he reproduced in its enRrery <br /> Page 17 of 34 <br />