(A) Private Sewage Treatment And Disposal Systems:
1. General: The village board may, when it deems necessary for the health, comfort, safety and general welfare of the present or future population of the area and necessary to the conservation of water supplies and drainage sources, prohibit the subdivision of land requiring the use of septic tank and effluent disposal systems for the disposal of sanitary wastes. If a septic tank system is permitted, every lot in a subdivision shall have a suitable area of sufficient size to accommodate a septic system equivalent to two (2) times the disposal requirements of a five (5) bedroom home, as provided in section 4-2-7-1, appendix G, exhibits A and B of this code.
2. Soil Investigation: A minimum of one observation pit at each intersection of a two hundred foot (200') grid is required with intermediate observations at critical soil boundaries so as to allow intensive mapping of soil characteristics applicable to the design of private sewage disposal systems. At least one observation point shall be located on each proposed lot.
3. Groundwater Table: The anticipated groundwater and seasonal high water table as interpreted from soil classifications shall be indicated for all lots within the subdivision. Special engineering solutions will be required on those lots where a seepage field does not clear the groundwater level by four feet (4') and the limiting layer by two feet (2') when normal cut and cover construction methods are used.
4. Unsuitable Lots: Those lots which contain soil types with very severe limitations as to their use for the installation of subsurface seepage fields as described in chapter 7, exhibits A, B, C, and D of this title will be considered unsuitable for installation of said systems. An engineering solution for upgrading each lot to a usable level shall be submitted to the village for approval and record. Engineering solutions shall not violate any laws or ordinances relative to natural drainage or floodplains and must meet the requirements of section 4-2-7 of this code.
If a proposed lot cannot be upgraded sufficiently for installation of subsurface disposal system, the lot shall be dropped from the plat and the area distributed among adjacent suitable lots.
All lots containing unsuitable soils or water problems for installation of subsurface seepage fields shall be recorded on the final plat of subdivision as such.
(B) Special Soil Regulations For Private Sewage Treatment And Disposal Systems:
1. Wet Soils:
a. The installation of subsurface sewage waste disposal systems in wet soils shall be permitted only if assured groundwater control is achieved.
b. The water table in the area of the filter field shall be maintained at an elevation four feet (4') below the bottom of the filter field lines.
c. The size of the seepage field for all subsurface sewage waste disposal systems shall be based on soil investigations conducted in the soil in which the field is to be installed, in accordance with section 4-2-7-1, appendix G, exhibits A and B of this code.
d. No on site subsurface sewage waste disposal system will be allowed in peotone type soils, symbol 330.
2. Clayey Soils:
a. The installation of subsurface sewage waste disposal systems shall be permitted in clayey soils, only when properly conducted soil investigations in the natural soil show the loading rate to be greater than or equal to 0.20 gallons per square foot per day.
b. Any septic system permitted in clayey soils will be installed only in natural or undisturbed soils. No importation of soil for the construction of a septic system will be allowed.
c. Any septic system designed for installation in clayey soils shall provide for the diversion of the maximum amount of rain or storm water which would flow across the site. In addition, interceptor tile drainage lines shall be installed upslope from the filter field to assist in moving runoff around the field area.
d. The size of the seepage field for all subsurface sewage waste disposal systems shall be based on soil investigations conducted in the soil in which the field is to be installed, in accordance with section 4-2-7-1, appendix G, exhibits A and B of this code.
(C) Land Application Treatment Systems Not Permitted: A land application wastewater treatment system shall not be permitted within the corporate limits of the village.
(D) Land Application Treatment Systems Allowed With Approval: Any land application wastewater treatment system on unincorporated territory to which these subdivision regulations apply pursuant to subsections 6-2-3(A)2, (A)3 and (A)4 of this title shall be operated and maintained by the county or sanitary district in which the system is located. Proof of acceptance by the county or sanitary district of responsibility for operation and maintenance of the system shall be a condition to approval by the village of the final plat of subdivision. (Ord. 13-16, 10-28-2013)