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INTRODUCTION Mr. Robert Pombo is creating a second parcel from property he owns at 3100 West M7Subsurface near Tracy,CA. According to the San Joaquin County Development Title, a Surface Contamination Report(SSCR)must be conducted prior to the time of Tentative Map submittal. The purpose of this report was to investigate the subject property for real or potential environmental contamination and report the findings to the Client and the San Joaquin County Environmental Health Department. This report complies with the San Joaquin County Ordinance, specifically 9- 905.12(a)for a"Surface and Subsurface Contamination Report." In addition,the report addresses and evaluates non-point sources of hazardous materials,and also potential point sources. Non-point sources of hazardous materials include agricultural chemical residues, high concentration of nitrate laden aroundwater and other contaminants which may have originated from a wide area. Point sources investigated include fuel storage tanitS, se0tic systems_ and/or chemical storgZg aC=, No chemical analysis was conducted for this investigation,nor was there an inspection of the existing residential structure for asbestos containing materials(AGMs). Since the Pombo's home was built in 1991, ACMs should not be a concern. An analysis of the domestic well serving the house on proposed Parcel "I" will be tested for nitrates and the agrichemical dibromochlorpropane(DBCP)for the Soil Suitability Study. A Soil Suitability Study is also required for this project by the San Joaquin County Environmental Health Department. SITE DESCRIPTION As illustrated on the attached Tentative Map,the "Designated Remainder" (Remainder Parcel) consists of an irregular-shaped rectangular property, flat 35.5 acre parcel that is currently planted in pasture grasses. Parcel "1" is elevated by approximately 15 feet from the elevation of the Designated Remainder, and is to consist of 10.00 acres. Import soil that could have been potentially contaminated was not imported to build the house pad. Soil from the surrounding acreage was undercut and transported to build up the house pad. The house pad contains only the Pombo's single family home. An on-site domestic well and septic system serves this house. There have never been any problems with the septic system under normal conditions. Storm drainage is existing natural drainage,primarily toward the Remainder Parcel and to the west,toward Interstate 5 where there is an unlined drainage ditch. The property is subject to the 100-vear flood,which was experienced in 1997. Obvious impact to the on-site septic system and well occurred from this flood. The site is bordered to the north, south,east and west by Interstate 5, agricultural production land, and oral, extremely low density single family housing (ranchettes). The subject property is currently zoned Al culture40 and will remain so. There are no easements traversing proposed Parcel "I" and the subject property is in the Williamson Act. Page 4- Va&y Ag Research