SU0002320_SSNL - Laserfiche WebLink

Home Browse Search

The purpose of these Studies was threefold and based upon PHS-EHD Conditions of Approval: ❑ To analyze the capacity of the indigenous soils within the proposed leachfield area to accept the anticipated wastewater flows and ensure the area is suitable for septic tank usage. This was accomplished by percolation testing and chemical analyses. ❑ To address septic system design and septic tank operation for the two areas that will contain septic systems: Area south of the "Ski Shop" and the "picnic" area adjacent to the sand beach. C] Assess the characteristics of the soils to determine nitrate loading and mitigation measures through the Nitrate Loading Study. II. SOIL SUITABILITY STUDY FINDINGS A. SUBJECT PROPERTY AND SURROUNDING STUDY AREA INFORMATION The subject property has been owned by John Eagal since 1998. Prior to his ownership, the area for the proposed ski lake, ski shop and picnic area was farmed in carrots. The surrounding land use to the north, south, east and west of the project is, and has been, in agricultural production for many decades. The agricultural production is evidenced by the United States Department of Agriculture (USDA) Soil Maps for San Joaquin County. Applications on file with the County Environmental Health Department reveal that there have been no permits issued for repairs/additions to existing systems in the one-half mile study area due to the fact that there is only one structure within the study area. Therefore, it is difficult to determine if the soil is conducive for long-term effluent acceptance and management. B. SOIL PHYSICAL CHARACTERISTICS AND ANALYTICAL TEST RESULTS The attached photographs and USGS map illustrate that project site has level terrain; consequently, there will be no need to incorporate design considerations for slopes. The United States Department of Agriculture - Soil Conservation Service (USDA-SCS) indicates the on-site surface soils (down to five ft)to consist predominately of a Columbia fine sandy loam (#131). This soil unit was observed to possess a medium brown fine sandy silt, with the underlying material stratified with a fine sandy silt/ silty sand which was rust mottled. Our soil investigation began with two "extendahoe" backhoe test pits in the proposed leachfield area for the Ski Shop, and one hand-boring conducted in the proposed restroom location at the "Sand Beach" area. The test pits and hand boring provided: 1.) A profile of the underlying soil 2 Va&y Ag Research