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INTRODUCTION This Soil Suitability Study.presents the results of our investigation concerning the soil strata and groundwater under the above-referenced subject property. Our study was completed to 1.) Determine if the homesite Parcel that is being split-off remains acceptable for a septic system which will function properly for its anticipated lifespan, 2.) Test water from the on-site domestic well for nitrate and the agrichemical DBCP/EDB, and 3.) Provide 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. SUBJECT SITE AND STUDY AREA BACKGROUND INFORMATION The purpose of this project is to create a parcel around an existing residence. The subject property is currently zoned Agriculture-40 (AG 40) and will consist of two Parcels: Parcel "A" will be the residential parcel that contains an existing home with a well and septic system, and will be 3.00 acres. The remaining Parcel is referenced as the REMAINDER PARCEL ("Designated Remainder") and will be 48.71 acres. It is currently planted in beans which is rotated with tomatoes. Attached, is the Tentative Parcel Map illustrating the designations and orientation of the subject Parcels. As noted on the Tentative Parcel Map, there is the existing house and no buildings on the Designated Remainder. The topography of the site is flat with a contour line of 100 feet traversing the property. Therefore, no design criteria for slopes would have to be incorporated into a possible repair, or for a new septic system. On-site stormwater drainage flows directly south of the house to a small basin and the remainder of the property flows north, south, east and west. Drainage does not appear to affect the existing septic system and the property is not subject to the 100-year flood. The property is located southeast of the city of Tracy, directly north of Linne Road. The study area consists predominately of agricultuial production land - primarily row crops, orchards and pasture land. Surrounding structures consist of low density single family housing, residential = = ranchettes, barns and commercial/industrial facilities.:There is a single family home under construction directly east of the Costa's residence. This house is on the adjoining property. _ Sewer hookups for the houses on Linne Road to the City of Tracy will be decades away, if ever.. A review of Application Permits on file with the San Joaquin County Environmental Health Department shows there have been five Applications for Repairs/Additions to septic systems within the one mile radius study area,with particular emphasis to houses on Linne Road. These applications were for additional leachline drainage and sumps. Since the water table has come within 35 feet of the land surface in this area, seepage pits are not allowed. Five septic system repairs and additions within the study area can be considered a medium number and indicates the systems in this area have a definite lifespan. This may be attributable to biomat formation. Pa e -1- NaCley Ag Research