A. General Requirements. In all new subdivisions all lots or parcels which cannot be connected to a public or community sanitary sewage system shall be provided with an on-lot sewage disposal system prior to the occupancy of, or use of buildings constructed thereon. In order to determine the adequacy of the soil involved to properly absorb sewage effluent and to determine the minimum lot area required for such installations, an interpretive map based on the National Cooperative Soil Survey showing the suitability of the soil for septic tank fields or pits will be submitted along with the results of percolation tests. The results of these data will be reviewed by the Board and by the Department of Health, to determine the general suitability of the soil for on-lot disposal systems.

     1. Lands made, altered or filled with non-earth materials within the last ten (10) years shall not be divided into building sites which are to be served by soil absorption waste disposal systems.

     2. Each lot shall have fifty (50) percent of its minimum required lot area or twenty thousand (20,000) square feet, whichever is less, in slopes of less than fifteen (15) percent.

     3. Each subdivided lot to be served by an on-site soil absorption sewage disposal system shall contain an adequate site for such system. An adequate site requires a minimum depth of eight (8) feet from the surface of the ground to impermeable bedrock, and a minimum depth of eight (8) feet from the surface of the ground to the groundwater surface (based on annual high water level).

     Each site must also be at least one hundred (100) feet from any water supply well, at least fifty (50) feet from any stream or water course, and at least ten (10) feet from any dwelling or property line.

     4. Soils having a percolation rate slower than sixty (60) minutes per inch shall not be divided into building sites to be served by soil absorption sewage disposal systems.

     5. Land rated as having severe limitations for septic tank absorption fields as defined by the (county soil survey) U.S. Department of Agriculture, Soil Conservation Service, shall not be divided into building sites to be serviced by soil absorption sewage disposal systems unless such building sites contain not less than twenty thousand (20,000) square feet of other soils rated suitable for building construction and installation of an on-site soils absorption sewage disposal system.

     6. An applicant desiring to install soil absorption sewage disposal facilities on the soils having severe limitations, as determined in the preliminary plan review, shall: have additional on-site investigations made, including percolation tests; obtain the certification of a soils scientist that specific areas lying within these soils are suitable for the proposed soil absorption sewage disposal system; and meet the Health Department regulations. In addition, the Sanitary Inspector shall find that the proposed corrective measures have overcome the severe soil limitations.

     7. Other applicable standards adopted by the Board or the Health Department: An applicant desiring to install soil absorption sewage disposal facilities on soils having severe limitations shall have an opportunity to present evidence contesting such classification and analysis, if he or she so desires. Thereafter, the Board may affirm, modify or change the classification.

     B. Sanitary Sewer Mains, Laterals and House Connections. Where local, County and regional master plans indicate that construction or extension of sanitary sewers may serve the subdivision area within a reasonable time, the Board may require the installation and capping of sanitary sewer mains and house connections in addition to the installation of temporary individual on-lot sanitary disposal systems. Responsibility for the design and supervision of installation of all capped sewers, laterals, and house connections shall be that of the county involved. Whenever individual on-lot sanitary sewage disposal systems are proposed the subdivider shall either install such facilities, or require by deed restrictions or otherwise as a condition of the sale of each lot or parcel within such subdivision that on-lot sanitary sewage disposal facilities be installed by the purchaser of the lot at the time that the principal building is constructed. In all other cases, sanitary sewage disposal facilities shall be provided for every lot or parcel by a complete community or public sanitary system.

     C. Test Procedures. Test procedures shall be conducted in accordance with U.S. Public Health Service Publication Number 526,1963 Edition, and other County requirements.