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I. INTRODUCTION This report issues my investigative findings and design parameters for the proposed septic system to be installed for this project. These Studies were completed as a requirement of the San Joaquin County Environmental Health Department(EHD)to ensure that the septic system is adequately designed for its intended use and to assess and quantify environmental impact potential. 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. SSS§�1. 1.2 GHG Investments, Inc. is the registered owner of the 2.58 acre subject property and the Di on Transportation Logistics Company. The property is proposed to be a Class 8 tractor- trailer vehicle parking facility with a guard house to be located at the entrance. There is to be no other on-site structures. Surrounding land use is illustrated by the attached Google aerial photo and is predominately residential and commercial development. NLS§2. , SSS(;I . As noted on the attached District Viewer map,the subject property is located in the C ofenter Road and the Highway 99 Frontage Road, in south Stockton. The following summarizes the investigative parameters included to complete this report: • Soil chemical testing was conducted on two samples retrieved from percolation test boring. Physical testing of the soil samples included particle size (texture) analysis and the actual percolation testing to determine soil permeability. Chemical testing included analyses for the constituents that influence nitrate loading. • The capacities of the on-site soils in the proposed effluent disposal location were analyzed for: 1.) The ability to accept future calculated wastewater effluent flows from the restroom located in the guard house, 2.) To quantify through calculations,the nitrate impact potential to the underlying groundwater from percolating effluent, 3.) To assess the characteristics of the on-site soils to mitigate nitrate impact,and 4.) Describe design processes to mitigate nitrate loading. This was accomplished by the referenced testing, calculations and design factors. 0 The new wastewater management (septic) system for the proposed facility, including the primary and 100%replacement effluent disposal areas are included on the attached Site Plan. In summary, the soil testing has found the indigenous surface soils to contain a high clay content material down to a depth of approximately two ft. A fine sandy clay loam material exists below this clay stratum that possesses acceptable permeability at approximately one-third of the maximum permissible rate Management of wastewater effluent by the soils at typical soil-effluent interface depths will easily occur within the proposed disposal area. 1