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1.0 INTRODUCTION AND PROPOSED DEVELOPMENT The purpose of this report was to investigate the subject property, consisting of the two Parcels listed on the Title Page, 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 Ordinances, specifically 9-905.12(a) for a Surface and Subsurface Contamination Report. The subject property is located approximately one-half mile northeast of the intersection of Wagner Road and Highway 120. Quartaroli & Associates of Manteca prepared the Tentative Map for this project, which is found in Appendix A. The land area assessed for this Surface and Subsurface Contamination Report is outlined in red on both the Tentative Map and on the San Joaquin County Parcel Viewer Aerial Maps. According to the San Joaquin County Development Title, a Surface and Subsurface Contamination Report (SSCR) m1!9 eco ucted prior to Tentative Map submittal. It is my understanding the current zoning is AG-40 r both Parcels, and there is no proposal to change the zoning. Interpretation of County Ordinance Section 9-905.12 (a) has been to focus on the subject property exclusively, unless it is documented or observed that an environmental concern in proximity to the subject property could potentially affect said property. This Surface and Subsurface Contamination approaches,but does not completely encompass the requirements of a Phase I Environmental Site Assessment (ESA) as promulgated by the American Society of Testing and Materials (ASTM E-1527-00). The Environmental Health Department recognizes that the Surface and Subsurface Contamination Report is not intended completely to fulfill the requirements of the Phase I ESA. The Department does however, maintain that certain components of the Phase I ESA must be applicable to the SSCR, as follows: Section 7.1.7 of the ASTM Document states under"Sources of Standard Source Information," that"information or other record information from government agencies may be obtained directly from appropriate government agencies or from commercial services." tatt�11�ap. As referenced, the boundary limits for this SSCR are the red lines as depicted on the The area encompassing Parcel "I" is 2.74 acres, and the area designated as the "Designated Remainder" is 43.39 acres. A single family residential structure exists on Parcel "I" along with a detached garage and a mobile home unit. At this point in time there is no proposal to build any other structure on the subject property. There is sufficient land area for a primary and second unit dwelling on the Designated Remainder. This report addresses and evaluates non-point sources of hazardous materials, as well as potential point sources. Non-point sources of hazardous materials include potential agricultural chemical residues and the potential for high nitrate concentrations in the underlying groundwater. res . Page -2- Chesney Consulting