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I. INTRODUCTION This Soil Suitability Study presents the results of our investigation concerning the soil characteristics and groundwater under the subject property referenced on the Title Page. Our study was completed to satisfy the requirements of the San Joaquin County Environmental Health Department (EHD), specifically to: 1.)Determine if the proposed eleven homesite Parcels are acceptable for the proper operation of a septic system which will function as intended for its anticipated lifespan, and 2.)Provide analysis and recommendations based upon the environmental criteria encountered in this study. Our report is in compliance with the requirements for a Soil Suitability Study under Development Title Section 9-1105.2 Item(d) of the San Joaquin County Ordinance Codes. Additional Conditions of Approval are stipulated in the August 24, 2004 EHD Memorandum to the San Joaquin County Community Development Department. There are no domestic or irrigation wells on the subject property. Consequently,well water could not be sampled for the two constituents normally sampled and tested for EHD requirements, namely nitrate and the agrichemical DBCP. II. SUBJECT SITE AND STUDY AREA BACKGROUND INFORMATION The subject property is south of the City of Tracy,between MacArthur Drive and Tracy Boulevard, and north of the California Aqueduct. Surrounding property use consists predominately of row crop and pasture land, extremely low density single family residences, and commercial facilities such as gravel mining operations, a cattle ranch, refuse disposal and the Tracy Airport. The subject property is currently zoned Agriculture 40. Municipal sewer will probably never serve this area, or at least not for several decades. The project as proposed by the owner,Mr. Russell Kagebiro, is to create 11 Parcels from an existing 455.12 acres of land composed of three separate Assessor Parcel Numbers. The purchaser of each Parcel may construct a single family residential (SFR) structure with a septic system and domestic well. It is possible EHD would support second unit dwellings on the proposed Parcels. The septic systems and wells for each Parcel must be installed under EHD permit and inspection. Parcel area and orientations are denoted on the attached Tentative Map, found in Appendix A. The entire property is vacant. A number of pipelines traverse the subject property. These include a Chevron-Texaco oil pipeline, and a PG&E natural gas pipeline both near the Delta Mendota Canal, a Union Oil pipeline near the California Aqueduct, and Plainview Irrigation District underground irrigation pipelines and manholes. Any purchaser of a respective Parcel must contact Underground Service Alert (USA)before digging. As depicted on the attached USGS Map and the Tentative Map,the topography of the site ranges from 240 ft MSL in the southwest corner of the project to 160 ft MSL in the northeast corner. This gives a land declination toward the northeast of: (240 - 160= 80 ft)_ -5,280 ft= 1.5%. Therefore, septic system design criteria for slopes do not have to be considered. Page -2- Chesney Consulting