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SOIL ASSESSMENT FOR PROPERTY ACQUISITION <br /> SHELL OIL COMPANY <br /> INTERSECTION OF INTERSTATE 205 AND GRANT LINE ROAD <br /> TRACY, CALIFORNIA <br /> DELTA PROJECT NO. 40-89-052 <br /> 1.0 INTRODUCTION <br /> Delta Environmental Consultants, Inc. (Delta), has been authorized to conduct a soil investigation to <br /> evaluate the presence or absence of petroleum constituents and pesticides/herbicides in soils beneath <br /> a parcel of land at the intersection of Grant Line Road and Interstate 205 (I-205) in Tracy, <br /> California. The soil assessment is being done in conjunction with a possible property transfer. <br /> This report presents descriptions of soil conditions underlying the site as discerned by advancing six <br /> exploratory soil borings. The boring locations were selected to identify the possible presence of <br /> hydrocarbon and pesticide/herbicide constituents in soils and to represent soil conditions across the <br /> 2-acre site. <br /> 1.1 Purpose <br /> The soil investigation was undertaken to: <br /> • Determine whether surface soils contained pesticide/herbicide residues. <br /> • Determine whether soils beneath the site contained petroleum constituents. <br /> 1.2 Scope of Work <br /> To accomplish these objectives, the following work has been performed: <br /> • Six exploratory soil borings were advanced with a hollow-stem auger drilling rig. <br /> • Soil samples were collected from the soil borings near ground surface and at 5-foot- <br /> depth intervals, using standard protocol, for description and classification purposes and <br /> for chemical analysis by a State-certified laboratory. <br /> • Soil samples were screened with a photoionization detector(PID)for total organic vapors. <br />