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O1 May 2007 AGE-NC Project No. 07-1516 Page 4 of 39 According to Mr. John Trinkle, whose father was a long-term owner of the property, the property was known to have operated as an agricultural crop dusting service for at least 50 years until closure in 2001. The crop dusting service formerly utilized underground storage tanks for gasoline and aviation fuel and stored pesticides, fertilizers and herbicides in a fenced area along the northwest property boundary. From the late 1990s to the early 2000s scrap metal and old aircraft were stored in a fenced area east from the current hangar building / on the southern portion of the property. At the time of the site reconnaissance the hangar building included stored oils, waste oils, paint and other materials on pallets over dirt flooring. The use of petroleum hydrocarbons, pesticides, fertilizers and herbicides on the property provides the potential for the sence contamination on the property. The purpose of the Phase I was for refinancing of the property following a sale of the property between family members/estates. • The relationship of the purchase pric�te-the fair market value of the property is not applicable to this report. 2.0. SITE DESCRIPTION The subject property was located south of the City of Tracy, San Joaquin County,north of Durham Ferry Road and bound by South Highway 33 to the west and South Koster Road to the east. Figure 1 shows the setting of the subject property located near the southeast quarter of Section 17, Township 3 South, Range 6 East, Mount Diablo Base and Meridian (7.5 Minute United States -� Geological Survey(USGS)Topographic Series, Vernalis Quadrangle, California). The map shows the subject property located at an elevation of approximately 81 feet above mean sea level and in an area of low topographic relief;the regional slope of the area is relatively gentle and dips toward the north-northeast. A crop dusting service formerly operated at the site; at the time of the site reconnaissance, several buildings had been demolished and the property was undeveloped ea for a metal hangar building with dirt flooring used for storage,an asphalt runway an cma11 enced gAr area on the southern portion of the property. The property was served by a dd stic water well to ted on the adjacent property to the north. The property was fenced on all si s; the entrance ere located on the west and east sides and were secured by poles and chains. The pro atures e su ' roperty are depicted in Figure 2, photographs of the subject property are provided iWAppendix A. i� _f Advanced GeoEnvironmental,Inc.