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v Current zoning is AG 40, which will not change. Municipal sewer will probably never serve this /area, at least not for several decades. v(§ 4.2)Any of the above land use could create environmental concerns that may be discovered in the future. As evidenced by the testing of the on-site domestic wells and the ag irrigation well, groundwater nitrate concentrations are above the Maximum Contaminant Level (MCL), presumably from agricultural inputs and nitrogen mineralization. This will be discussed in Section 4 of this report. As depicted on the attached USGS Map and the Tentative Parcel Map, the topography of the site is approximately 10 feet above MSL, and is completely level. Therefore, septic system design criteria for slopes do not have to be considered. (§ 3.1, 3.2, 3.3, and 3.4) The septic system that serves the existing aforementioned mobile home residential structure in the extreme northeast corner of the Designated Remainder has been functioning properly for approximately 12 years without any problems. This may be attributable to the indigenous sandy/silty soils as evidenced by the percolation test results obtained for the homesite Parcel 1. A permit for this mobile home system was found in EHD files and is included in Appendix D. (§ 3.4) The subject property is in an area designated as "High Water Table Areas"by EHD's map denoting the various soil types and septic system requirements throughout the County. EHD requirements in this area are 100 feet of leachline per bedroom. /(§ 5.4) Since the water table is comparatively shallow in this area at approximately 12 feet (discussed in the following Section), and the fact that the shallow soil structure is adequate for proper effluent management, seepage pits are not allowed to be installed in this area. �§3.5 and 3.6) A review of Application Permits on microfiche file at EHD reveals there have been no Applications or Permits for Repairs/Additions/Replacements to septic systems on Kile Road exclusively. (§ 5.4) This can be considered a very low number of Repairs/Additions/ Replacements and can be attributed to the indigenous sandy-silty soil types, as previously referenced. All permits found in EHD files pertaining to septic systems on Kile Road can also be found in Appendix D. (§ 5.1 and 6.0) SOIL PROFILE AND PERCOLATION TESTING 'VI(§ 5.4) The USDA Soil Map shows the on-site soil to consist of a Scribner clay loam (#243). Typically, these soil types are poorly drained with moderately slow permeability according to the N.R.C.S. However, the percolation test results contradict this assumption. Sufficient soil "fines" exist to impede rapid percolation that would occur with a very sandy soil. Therefore, treatment of septic effluent can take place before reaching the water table, 12 feet below grade. The shallow perc tests for Parcel 1 had excellent percolation at the 36-inch depth,which is above a slightly cemented silts layer found at 40-42 inches below grade. This is discussed on the following Page. Page -2- Chesney Consulting