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Human Health Risk Assessment <br /> Farmer Mobil Oil Bulk Plant 44-343 <br /> 500 East Grant Line Road <br /> Tracy, California <br /> TABLE OF CONTENTS <br /> (Continued) <br /> FIGURES <br /> ---� <br /> 1-1 Site Vicinity Map <br /> ' 1-2 Ground Water Elevation Contour Map <br /> 1-3 Site Plan <br /> 1-4 Extent of April 1990 Soil Excavation <br /> 1 <br /> 5-1 Flowchart of the Exposure Assessment Process <br /> ' 6a CURRENT SITE CONDITIONS, NIOSH 10 hour TWA Benzene Concentration versus <br /> Predicted Nearby Retail Site-Specific Benzene Concentration <br /> 6b HYPOTHETICAL FUTURE SITE CONDITIONS, NIOSH 10 hour TWA Benzene <br /> Concentration versus Predicted Site-Specific Benzene Concentration <br /> TABLES <br /> 1 <br /> 1-1 Summary of the General Inorganic Chemical and Physical Quality Analyses <br /> for Ground Water <br /> 1-2 Summary of Analytical Results for Soil <br /> 1-3 Summary of Ground Water Monitoring and Sampling Results <br /> ' 1-4 Risks Associated with Common Activities <br /> 3-1 Physical and Chemical Properties of Diesel Fuel <br /> ' 3-2 Relative Composition of Unweathered Diesel Fuel in Five Component Classes <br /> 3-3 Physical and Chemical Properties of Gasoline <br /> 3-4 Physical and Chemical Properties of Benzene <br /> ' 3-5 Physical and Chemical Properties of Toluene <br /> 3-6 Physical and Chemical Properties of Ethylbenzene <br /> 3-7 Physical and Chemical Properties of Xylenes <br /> ' 4-1 Summary of Dose-Response Criteria for BTEX <br /> ' 5-1 Summary of Exposure Pathway Analysis <br /> 5-2 Summary of Exposure Parameters for the Reasonable Maximum Exposure <br />' 6-1 Sources of Conservatism in the Risk Assessment <br /> 30-0136-11 <br />