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SECTION 2 BACKGROUND AND SITE RECONAISSANCE The subject property is being considered for purchase by Home Depot for development as a planned retail shopping center. The property is located on a nearly level plain that borders low foothills to the south, and is situated in the western part of the city of Tracy, in San Joaquin County, California. The vicinity of the property is characterized by agricultural land with some commercial development to the east and south. The overall property consists of an irregular-shaped parcel occupying approximately 19 acres, extending to the north of West Grant Line Road and east of Naglee Road. The subject property is bounded on the south and east by commercial property, to the north by agricultural land, and to the west by a rural residence and agricultural land. The property has been agricultural land planted in hay, alfalfa, or row crops through the present time. No structures are known to have been located on the subject property(WESTON, March 1999). In March 1999, WESTON completed a Phase I environmental assessment on the adjacent lot where a Home Depot retail store is planned. This Phase I assessment concluded that the adjacent lot had a lows potential for contamination based on historical land use and a database search of reguiatory agency files. No records of environmental incidents for that property or the subject property existed in any of the databases searched. Three LUST sites are located within a half mile to the east (crossgradient) of the subject property. None of these sites are expected to have impacted the subject property. The City of Tracy Planning Department required that an assessment of possible elevated pesticides/herbicides and petroleum hydrocarbons be conducted prior to development of the property. The attendant Phase II investigation conducted by WESTON in May 1999 indicated that no petroleum hydrocarbons or volatile organic compounds (VOCs) were detected in site soil or groundwater. Trace concentrations of the herbicide Dalapon (2,2-dichloropropionic acid) were detected in one composite surface soil sample. However, no significant concentrations of chlorinated pesticides or herbicides were detected in soil or groundwater. At the time of the additional Phase I site reconnaissance 21 July 2000, the subject property was vacant of any building structures, and consisted primarily of fallow agricultural land formerly planted in hay or alfalfa. Two electrical transmission towers are located on the eastern boundary of the property, within a Pacific Gas and Electric (PG&E) Company easement that crosses the eastern and southern portions of the property. An underground PG&E high-pressure natural gas pipeline exists within this easement, thirty-feet south of the transmission lines. Additionally, a sewer manhole is present in the eastern part of the property, associated with a City of Tracy sewer easement crossing the southern and eastern portions of the property. A Chevron gasoline and diesel fuel pipeline is present adjacent to the southern border of the subject property, along the north side of Grant Line Road. Any leaks that may have occurred from this pipeline could potentially have impacted soil and/or groundwater in the southern portion of the site. A shallow ditch is present G:home\clarkeb\projects\homedepo\tracy\addp I&2.doc 2-1 July 1999