A.
Communal sewer systems shall be required:
(1)
In any multi-family development regardless of its location within the Town.
(2)
When a proposed subdivision which it will serve is located within the bounds of Orange County Sewer District No. 1 and Moodna Joint Sewer Basin regardless of the number of dwelling units in the subdivision. However, when the proposed subdivision is to be located within the secondary zone (Moodna Sewer District) of the Orange County Sewer District No. 1, before such zone is actually serviced by a sewer collection and treatment system, individual sewer systems may be permitted, if otherwise consistent with this section and § 41-20.
(3)
When the soil percolation rate for any lot, whether or not located in a proposed subdivision, is 60 minutes per inch or greater.
(4)
When a proposed subdivision consists of 50 lots or more regardless of the subdivision location within the town.
(5)
When a proposed subdivision is designed to initially accommodate 75 or more dwelling units in the aggregate regardless of the actual number of lots in the subdivision or its location in the town.
(6)
When a minimum separation of two feet cannot be maintained on any lot, whether or not in a subdivision, between the lowest part of a leaching system and the highest elevation of the top of the zone of water saturation, ledge rock, hardpan or other impermeable material at all times of the year.
B.
An individual sewer system may be permitted, if otherwise consistent with this chapter, in all situations where a communal sewer system is not required. No individual septic system shall serve more than one lot nor shall such a system serve a dwelling unit within a multi-family development.