A. Within Urban Service Area: Within the city’s urban service area, as defined by the comprehensive plan, all structures designed for human occupancy shall be connected to the public water and sewage disposal systems where feasible. On-site sewage disposal systems and private wells may be allowed within the urban service area on a temporary basis. Such facilities shall be designed so as to be easily connected to the public systems. If an on-site sewage disposal system or private well fails and a property has access to city facility, the property must connect to the public system. All private on-site sewage disposal systems within the urban service area shall conform with all other standards adopted by the city for their design, installation and maintenance.
B. Outside Urban Service Area: On-site sewage disposal systems and private wells will be permitted outside of the city’s urban service area, as defined by the comprehensive plan, only when all of the following conditions are met:
1. All on-site sewage disposal systems and private wells shall be designed, maintained and installed in accordance with applicable regulations of the state department of health, the Minnesota Pollution Control Agency standards and all other city regulations.
2. Where on-site sewage disposal systems are to be utilized, the lot shall have a minimum area of one and one-half (1 ½) acres of land on a slope of less than thirteen percent (13%), regardless of more lenient zoning regulations.
3. No on-site sewage disposal systems will be permitted in the following areas:
a. Areas where slopes are eighteen percent (18%) or greater;
b. Designated floodplains or wetlands;
c. Within seventy-five feet (75') from the normal high-water mark of a body of water or designated bluff lines; or
d. Any other areas designated by the utilities element of the Comprehensive Plan as unsuitable.
4. Special engineering of on-site sewage disposal systems may be required in the following cases:
a. Areas where slopes are greater than twelve percent (12%) but less than eighteen percent (18%);
b. Where percolation rates are slower than sixty (60) minutes per inch or faster than five (5) minutes per inch;
c. Where the ground water table is less than five feet (5') deep;
d. Where bedrock is within five feet (5') of the bottom of the system; or
e. Where soil classifications require the use of alternative systems.