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(§ 1.0) INTRODUCTION FFcharaScten ability Study presents the results of my investigation concerning the soil s and groundwater under the subject property referenced on the Title Page. It was satisfy the requirements of the San Joaquin County Environmental Health Department(EHD), specifically: 1.) To determine if the two proposed 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 (§ 1.1, 1.2, 2.1 ) The purpose of this project is to subdivide an existing 4.43± acre Parcel into two Parcels denoted a&Parcel 1, which is to be 2.38± acres, and Parcel yhjc 2.05± acres. This Parcel area is depicted on the S.J.C. Parcel Viewer Map bund n Appendix A single family residential (SFR) structure and"out-buildings"exists on prop A mobile home is located on proposed Parcel 2. Individual septic systems serve each residential structure and one domestic well serves both residences. There may be a proposal to build a new structure on one or both subject Parcels at some time in the future. (§ 3.7) Each Parcel orientation is denoted on the attached Tentative Map, also found in Appendix A. The EHD may support a second unit dwelling on proposed Parcel 1 and/or 2 under further review by the appropriate local governmental agencies. If the primary house and a second unit dwelling were built on Parcel 1, and a primary and second unit dwelling built on Parcel 2, this would give a total of four septic systems on the two Parcels comprising approximately 4.6 acres. This is a density of one septic system per 1.2 acres, which can be considered marginally acceptable. (§ 1.1 and 2.1) The subject property is approximately three miles west of the City of Tracy, near the new town of Mountain House. Surrounding property use consists predominately of medium density single family homes and ranchettes on-se►3tiusystems, a school, industry and agricultural production land to the south. Current zoni' is R-R. o proposal exists to change the zoning. Municipal water and sewer may eventually s -this area; however, it may be several years or decades until that time. (§ 4.2) Any of the above land uses could create environmental concerns that either have already been discovered, or may be discovered in the future. As evidenced by the testing of the on-site / domestic well and the testing of surrounding domestic wells, groundwater nitrate concentrations are high-to-very high. Page -1- Chesney Consulting