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I. INTRODUCTION This report issues my findings regarding the Nitrate Loading Study, Soil Suitability Study and onsite wastewater treatment system (OWTS) operational and design parameters for a proposed accessory(previously referred to as a"second unit") unit dwelling on property owned by Mr. Makmoud and Ms. Kireyeva. These studies were required by the San Joaquin County Environmental Health Department (EHD) and comply with the San Joaquin County Development Title, specifically Section 9-1105.2(d). Within the text of this Report, Bolded Section (§) numbers are referenced at the beginning of an applicable Paragraph or Paragraphs, or Appendices that correspond with the EHD Requirements Checklist. Section Numbers referenced as SSS§, are sections applicable for the Soil Suitability Study Requirements Checklist. Section Numbers referenced as NLS§, are sections applicable for the Nitrate Loading Study Requirements Checklist. Other portions of text may also apply to other sections of the Checklists. NLS§2.3, SSS§ 1.2. Since this project is in the County of San Joaquin, the City of Tracy sewer system does not serve this property. All residential properties within this locale must operate with a septic system, also known as an onsite wastewater treatment system, and domestic water supplied by an onsite well. At present, the subject property contains a four bedroom manufactured (modular) home, the septic system that serves this structure, and a domestic well. The total Parcel area is 0.80 acres. The purpose of these Studies was to collect the following information to fulfill the requirements of the EHD. Wastewater system operational parameters are also presented within this report to facilitate the transfer of information to EHD: • The capacity of the indigenous soils was analyzed in the proposed primary disposal area for the accessory unit dwelling to accept the anticipated wastewater flows, 2.)Assessment of the soil characteristics to mitigate nitrate impact,and 3.) Discussion of operational parameters to achieve the two goals of proper wastewater management and nitrate loading mitigation from the effluent disposal system. This was accomplished by the referenced testing, physical/chemical analyses and operational parameters incorporated into the design of the wastewater disposal system. • Soil physical and chemical testing was conducted to determine the following: Physical testing included percolation testing and particle size analysis of the soils underlying the effluent disposal area. Chemical testing included analyses for the constituents that influence nitrate loading. • The capillary fringe of the water table was not encountered during the backhoe excavation to install the septic tank that serves the existing four bedroom modular home. 0 As illustrated on the Site Plan, it has been determined that the required 100%replacement area for the existing modular home can be installed, and both primary and replacement areas for the proposed three bedroom modular home can be situated at the north property border of the subject property. 1 Chesney Consulting