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(§ 1.0) INTRODUCTION FrchaaScten ility Study presents the results of my investigation concerning the soil d groundwater under the subject property referenced on the Title Page. It was isfy the requirements of the SanJoaquin Environmental Health Department (EHD), specifically: 1.) To determine if the proposed two Parcels to be created from this subdivision 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. This 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. Within the text of this Report, bolded Section (§) numbers are referenced at the beginning of an applicable sentence,paragraph or paragraphs, or Appendices that correspond with the EHD Requirements Checklist for a Soil Suitability Study. (§ 2.0) SUBJECT SITE AND STUDY AREA BACKGROUND INFORMATION IV (§ 1.1, 1.2, 2.1 ) The purpose of this project is to subdivide an existing 20.98± acre Parcel, into two V Parcels denoted as Parcel 1,which is to be 10.53 acres gross and Parcel 2, which is to be 10.50 acres gross. It is a possibility that a single family residential (SFR) structure may be built on Parcel 1,which is currently vacant, open grazing land. Parcel l contains the Frost's residence and other ancillary buildings such as a barn and shed. It is possible that a second unit dwelling may be built on Parcel 2. A septic system and domestic well exists for the Frost's residence. The new home that may be built on Parcel 1 will have its own domestic well and septic system. m, Each parcel area and orientations are denoted on the attached Tentative Map, found in Appendix A. (§ 3.7) It is possible EHD would support a second unit dwelling on proposed Parcel 1 and 2. If a primary residence and second unit dwelling were built on Parcel 1, and a second unit dwelling were built on Parcel 2, this would give a total of four septic systems on the two Parcels comprising 20 acres. This is a density of one septic system per five acres,which can be considered a medium-low density. (§ 1.1 and 2.1) The subject property is 5.6 miles northeast of Escalon, and 1.5 miles west of the \\. small town of Valley Home. Surrounding property use consists predominately of low density single family residences, ranchettes, pasture, and confined animal facilities such as horse ranches, and other types of ag buildings. Current zoning is AG-10. Municipal sewer will probably never serve this area, or at least not for several decades. (§4.2) Any of the above land use could create environmental concerns that may be discovered in the future. As evidence by the testing of the Frost's domestic well, groundwater nitrate concentrations are very high,which will be discussed in Section 4 of this report. As depicted on the attached USGS Map, the topography of the site is 140 feet above MSL, with a very slight land declination toward the north. Therefore, septic system design criteria for slopes do not have to be considered. Page -1- Chesney Consulting