New York State Septic System Design Regulations 75-A.10 Other Septic System Types - design specifications
SepticAPedia ©
- Other Septic System Design Alternatives permitted by state regulations
- Approved designs for septic holding tanks, waterless
septic systems
- Approved (or not-approved) septic designs using chemical toilets, electrical and gas toilets
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Section 10 of the septic design regulations discusses
the procedures for evaluating, installing, approving other septic system types besides those already
discussed in detail here.
This document uses the New York State wastewater treatment standard for individual household septic systems
(Appendix 75-A) to provide an example of state regulated design and installation of both conventional
tank and leach field septic systems and alternative septic system
designs, including raised septic systems, septic mound systems, intermittent sand filter septic systems,
and evaportion-transpiration septic systems.
Also see
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Title: Appendix 75-A.10 - Other Septic System Alternatives: septic holding tanks, waterless
septic systems, chemical toilets, electrical and gas toilets
Effective Date: 12/01/90
[DF NOTE: this section of NYS regulations discusses "alternatives" to onsite wastewater
disposal systems. None of the systems discussed here dispose of septic effluent on the
primary site, and some avoid effluent production completely, other than human excreta.
New York regulations (effective in 1990) do not discuss other septic and onsite wastewater handling methods
such as aerobic septic systems. Readers should therefore also be sure to see
DESIGN ALTERNATIVES.]
(a) Holding Tank Septic Systems
The use of holding tanks shall not be permitted for
new home construction except where occupancy of a home is permitted
while the sewage treatment system is under construction. Tank size
shall be based upon five days design flow or 1,000 gallons, whichever is
greater and meet the same construction as a septic tank except that the
holding tank shall not have an outlet. Holding tanks are not acceptable
for long term use on year-round residences.
(b) Non-Waterborne Septic Systems
(1) Waterless Toilets - General
In certain areas of the State where running water is not
available or is too scarce to economically support flush toilets, or
where there is a need or desire to conserve water, the installation of
non-waterborne sewage systems may be considered however, the treatment
of wastewater from sinks, showers, and other facilities must be provided
when non-flush toilets are installed. Household wastewater without
toilet wastes is known as greywater.
(2) Composters [Composting Toilets].
These units shall be installed in accordance with the
manufacturers instructions. The units shall have a label indicating
compliance with the requirements of National Sanitation Foundation (NSF)
Standard 41 or equivalent. Only units with a warranty of five years or
more shall be installed.
(3) Chemical and Recirculating Toilets
(i) Chemical toilets provide a toilet seat located directly above a
vault containing a chemical to disinfect and remove odors from the
wastewater. Recirculating toilets use chemicals as the toilet flush
fluid. The wastes are separated from the fluid, wastes discharged to an
internal holding tank, and the fluid reused.
(ii) The liquids used in these types of toilets do not completely
disinfect the wastes; therefore, waste products from these units shall
not be discharged to surface waters or to the ground surface.
(iii) The reduced volume wastewater from recirculating toilets may be
discharged to a larger holding tank but not to a subsurface absorption
system.
(4) Incinerator Toilets [Gas, Electric Toilets]
These units accept human waste into a chamber
where the wastes are burned. They have a very limited capacity and
require a source of electricity or gas. The ash remains must be
periodically removed. They must be installed according to the
manufacturer's instructions.
(5) Greywater Systems
Greywater [grey water, greay water] systems shall be designed upon a flow
of 75 gpd/bedroom and meet all the criteria previously discussed for
treatment of household wastewater.
[DF NOTE: Grey water is water that does not include sewage, including
water from sinks, showers, and laundry facilities.]
© Engineered Septic Systems
(1) A treatment system of a type not discussed in this document may be
allowed only through the issuance of a Specific Waiver by the health
unit having jurisdiction as provided for in Part 75, of this Title.
(2) Special Conditions.
(i) The system shall be designed by a design professional.
(ii) An environmental assessment determines that the development of the
site with this system is consistent with the overall development of the
area and will cause no adverse environmental impacts. The
homeowner/purchaser shall be informed of the expected reliability or
problems with the design.
(iii) The design professional supervises the installation of the system
and certifies that the system was built in accordance with the approved
plan and/or submits as-built plans of the system.
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