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`r Current zoning is AG 40 which will not change. Municipal sewer will probably never serve this arse, at least not for several decades. A§ 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 relatively high in the shallow aquifers, presumably from agricultural inputs and nitrogen mineralization,but significantly lower in the deeper aquifers as was observed in the ag irrigation well. This will be discussed in Section 4 of this report. As depicted on the attached USGS Map, the topography of the site is approximately 13 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 residential structure in the extreme southeast comer of the Designated Remainder has been functioning properly for several decades without any problems. This may be attributable to the indigenous sandy/silty soils, as evidenced by the percolation test results obtained for Parcel 1. A permit for this system was not found in EHD files. ✓(§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 13 feet (discussed in the following Section), and the fact that the shallow soil structure is adequate for proper effluent management, seepage pits arc 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 be found in Appendix D. (§ 5.1 and 6.0) SOIL PROFILE AND PERCOLATION TESTING (§ 5.4) The USDA Soil Map shows the on-site soil to consist of a Sailboat silt loam(#234). 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, 13 feet below grade. As discussed below, the shallow perc tests for Parcel 1 had excellent percolation,which is indicative of this soil type. �(§ 5.29 5.3, and 5.4) A Log of Boring using the Unified Soil Classification System (U.S.C.S.), as observed in a 12-foot deep backhoe test pit completed on Parcel 1 near the proposed leachfreld area, is found on the EHD PERCOLATION TEST DATA SHEET. Page -2- Chesney Consulting