SR0081494_SSNL (2) - Laserfiche WebLink

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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 Onsite Wastewater Treatment System(OWTS) for this project is adequately designed for its intended use and to assess, quantify and mitigate nitrate 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, 1.2. Mr. Ranjit Singh and Ms. Barbara Meyer are the registered owners of the 15.71 acre subject property, to be known as the French Camp Truck Terminal, LLC. The property is proposed to be a Class 8 tractor-trailer vehicle parking facility with a shop,truck wash, office, and restroom. It is my understanding the truck wash will no longer be considered to be included within this development. Surrounding land use is illustrated by the attached Google aerial photo and is predominately industrial, commercial,residential and open/agricultural land development. NLS§2.3, SSS§3.1. As noted on the attached District Viewer map, the subject property is located in the NEC of French Camp Road and El Dorado Roads in the town of French Camp. The following summarizes the investigative parameters included to complete this report: • Soil chemical testing was conducted on two samples retrieved from percolation test borings, which included analyses for the constituents that influence nitrate loading. Physical testing of the soil samples included particle size (texture) analysis and the actual percolation testing to determine soil permeability. • 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 entire project, 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 further mitigate nitrate loading. • 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. The soil testing has found the indigenous soils to contain a high clay content, tight material with slow permeability, down to a depth of approximately three ft. Soil depth transitions from a sandy clay loam to a loam(silt) at five ft, then to a loamy sand at the eight ft depth,where exceptional permeability exists. Chesney Consulting