SU0004688 SSNL - Laserfiche WebLink

Home Browse Search

Within the text of this Report, Bolded Section (§) numbers are referenced at the beginning of an applicable Paragraph or Paragraphs, Appendix or Table of Contents 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. II. SOIL SUITABILITY STUDY FINDINGS A. SUBJECT PROPERTY AND SURROUNDING STUDY AREA INFORMATION SSS§ 1.1 Surrounding land use,particularly to the south,west and north of the project is, and has been, in agricultural production for many decades. New development within the City of Lathrop is occurring approximately three miles to the south, and is projected to proceed north along the west side of Interstate 5. As noted on the San Joaquin County Parcel Viewer Maps,the current surrounding land use is composed primarily of agricultural production land to the north, south and west. To the east is Interstate 5, the City of Lathrop, and commercial facilities, all of which are on decentralized wastewater management systems. The property is zoned I-L, Limited Industrial. SSS§3.1, 3.2,3.3,3.4,3.5,3.6 Applications on microfiche file with the EHD reveal that there have been three permits issued for repairs/additions to existing systems within a one-half mile surrounding the project site. No septic system permits for the installation of the original on-site system for the Hayres Egg Ranch were found. Permits in this specific area of San Joaquin County would be few since County land to the north, south and west of the site is sparsely developed. The project site has relatively level terrain; consequently, there will be no need to incorporate design considerations for slopes within the two filter bed areas. Nor are there dramatic elevational differences between the new office building or the office trailers and the disposal field areas. B. SOIL PHYSICAL CHARACTERISTICS AND ANALYTICAL TEST RESULTS The United States Department of Agriculture - Soil Conservation Service(USDA-SCS) indicates the majority of the on-site soils to consist of a Manteca fine sandy loam(#196), with the extreme northeast corner of the property composed of Veritas fine sandy loam(#266). SSS§ 5.2 The surface and subsurface soil investigation and testing began with drilling a 20 feet deep boring with a truck-mounted drill rig in the proposed VLF and ELF locations. Soil samples were retrieved in five foot intervals with a split-spoon sampler. These three deep borings provided: 1.) A profile of the underlying soil characteristics, 2.) Depth to groundwater,which was found to be approximately 13 feet below grade for the ELF and 11 feet below grade for the WLF, 3.) Saturated formation (first aquifer)material type, analyzed to be of differing soil types as illustrated in Table 1 below, and 4.) A water table sample for analysis. Rust mottling was observed in both of these borings at the ten-foot depth that indicates seasonal soil saturation. Soil saturation may be beneficial for the promotion of denitrification potential. 3 Chesney Consulting