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INTRODUCTION This report issues my investigative findings regarding the Soil Suitability and Nitrate Loading Studies conducted for the project referenced on the Title Page. These Studies were required because of regulations enacted by the San Joaquin County Environmental Health Department (EHD)to determine if nitrate loading standards would be exceeded when improvements are proposed for a subject Parcel less than two acres in area. SSS§ 1.1, 1.2. Mr. & Mrs. Keenan are proposing to move a three bedroom, two bath modular (manufactured) home as a second unit dwelling onto the subject Parcel they own. A two bedroom, two bath primary dwelling exists on the property,which is undergoing renovation. An existing domestic water well is adjacent to the north of the primary dwelling and is proposed to serve both structures. SSS§ 1.3. The property is a total 1.40 acres as illustrated on the Assessors Parcel and District Viewer Maps. Both the Assessors Parcel and District Viewer maps illustrate the two subject Parcels as individual Parcels. However, it is my understanding a Lot Line Adjustment(LA-01-97) adjusted the property line between APN 25-260-10 and 257-260-11 so that 257-260-11 has been increased in area by 1.00 acres to a total of 1.40 acres (per APN Map). This LLA document is found in Appendix B. The property is surrounded by orchards and rural residential structures. Within the text of this Report, Bolded Section (§) numbers are referenced at the beginning of an applicable Paragraph(s), 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, but may not necessarily be referenced. The following summarizes the investigative parameters included to complete this report: • A percolation test was performed for this study in the proposed location of the future leachfield disposal area. Test results indicate a permeable soil at the shallow test depth, representative of leachline trenches or a filter bed onsite wastewater treatment system(OWTS). • Soil chemical testing was conducted on two soil samples retrieved from a backhoe test pit near the proposed disposal area for the modular home. Physical testing of the soil sample included texture particle size analysis for sand, silt and clay content and chemical testing analyses for the constituents that influence nitrate loading. • The nitrate loading to the on-site soils in combination with nitrate impact potential to the underlying groundwater from percolating effluent was calculated to be under the Maximum Contaminant Level. Natural nitrate impact mitigation measures have been described in this report. • Design and operational parameters of the proposed onsite wastewater treatment system (OWTS)to serve the new residence are included in this report. Pae -1- Chesney Consulting