(a) Each subsurface
sewage disposal system shall be constructed, repaired, altered or extended
pursuant to the requirements of this section unless an exception is granted in
accordance with the following provisions:
(1)
A local director of health may grant an exception, except with respect to the
requirements of Section
19-13-B103d(d)
and Technical Standard IIA, for the repair, alteration, or extension of an
existing subsurface sewage disposal system where he determines the repair,
alteration or extension cannot be affected in compliance with the requirements
of this section and upon a finding that such an exception is unlikely to cause
a nuisance or health hazard. All exceptions granted by the local director of
health shall be submitted to the Commissioner of Health Services within thirty
days after issuance on forms provided by the Department.
(2) The Commissioner of Health Services may
grant an exception to the requirements of Section
19-13-B103d(d)
upon written application and upon a finding that:
(A) A central subsurface sewage disposal
system serving more than one building is technically preferable for reasons of
site limitations, or to facilitate construction, maintenance or future
connection to public sewers, or;
(B) A subsurface sewage disposal system not
located on the same lot as the building served is located on an easement
attached thereto. Such easement shall be properly recorded on the land records
and shall be revokable only by agreement of both property owners and the
Commissioner of Health Services.
(3) The Commissioner of Health Services may
grant an exception to the requirements of Technical Standard IIA, upon written
application and upon a finding that such an exception is unlikely to pollute
the well in such a manner as to cause a health hazard.
(b)
Technical standards.
Subsurface sewage disposal systems within the scope of this regulation shall be
designed, installed and operated in accordance with the technical standards
established in the "Technical Standards for Subsurface Sewage Disposal Systems"
published by the Commissioner of Health Services. The Technical Standards shall
be reviewed annually and changes to the Technical Standards shall be available
on January 1st of each year.
(c)
Large subsurface disposal systems. The Commissioner of Health
Services shall approve plans for subsurface sewage disposal systems serving a
building with a designed sewage flow of two thousand gallons per day or
greater, and no such systems shall be constructed, repaired, altered or
extended unless the plans for such systems are approved by the Commissioner in
accordance with the following:
(1) Plans for
the system are submitted at least twenty days prior to approval to construct by
the local director of health.
(2)
The plans are designed by a professional engineer registered in the State of
Connecticut.
(3) The plans
submitted contain:
(A) The basis of
design,
(B) Soil conditions and
test pit locations,
(C) Maximum
ground water and ledge rock elevations,
(D) Original and finished surface contours
and elevations,
(E) Property lines,
and
(F) Locations of buildings,
open water courses, ground and surface water drains, nearby wells and water
service lines.
(d)
Location. Each building
shall be served by a separate subsurface sewage disposal system. Each such
system shall be located on the same lot as the building served.
(e)
Disposal of sewage in areas of
special concern.
(1) Disposal system
for areas of special concern shall merit particular investigation and special
design, and meet the special requirements of this subsection. The following are
determined to be areas of special concern:
(A)
A minimum soil percolation rate faster than one inch per minute, or
(B) Slower than one inch in thirty minutes,
or
(C) Maximum ground water less
than three feet below ground surface, or
(D) Ledge rock less than five feet below
ground surface, or
(E) Soils with
slopes exceeding twenty-five per cent, or
(F) Consisting of soil types interpreted as
having severe limitations for on-site sewage disposal by most recent edition of
the National Cooperative Soil Survey of the Soil Conservation Service,
or
(G) Designated as wetland under
the provisions of Sections
22a-36
through
22a-45 of
the Connecticut General Statutes, as amended.
(H) Located within the drawdown area of an
existing public water supply well with a withdrawal rate in excess of fifty
gallons per minute, or within five hundred feet of land owned by a public water
supply utility and approved for a future wellsite by the Commissioner of Health
Services.
(2) In such
areas of special concern, the local director of health may require
investigation for maximum ground water level to be made between February 1 and
May 31, or such other times when the ground water level is determined by the
Commissioner of Health Services to be near its maximum level.
(3)
(A)
Plans for new subsurface systems in areas of special concern shall:
(i) Be prepared by a professional engineer
registered in the State of Connecticut;
(ii) Include all pertinent information as to
the basis of design, and soil conditions, test pit locations, ground water and
ledge rock elevations, both original and finished surface contours and
elevation, property lines, building locations, open water courses, ground and
surface water drains, nearby wells and water service lines;
(iii) Demonstrate an ability to solve the
particular difficulty or defect associated with the area of special concern and
which caused its classification. The Commissioner or local director of health,
as the case may be, may require a study of the capacity of the surrounding
natural soil to absorb or disperse the expected volume of sewage effluent
without overflow, breakout, or detrimental effect on ground or surface waters
if in their opinion such may occur.
(B) The plans for new subsurface disposal
systems in areas of special concern shall be submitted to the local director of
health and the Commissioner of Health Services for a determination as to
whether the requirements of the subsection have been met, except that such
submission need not be made to the Commissioner of Health Services if the local
director or authorized agent has been approved to review such plans by the
Commissioner of Health Services in accordance with Section B103e (b). All
submissions to the Commissioner of Health Services shall be made at least 20
days prior to issuance of an approval to construct by the local director of
health.
(4) If
application is made for the repair, alteration or extension of an existing
subsurface disposal system in an area of special concern, the local director of
health may require that the applicant comply with the requirement of
Subdivision (3) if he determines that the contemplated repair, alteration or
extension involves technical complexities which cannot reasonably be addressed
by himself, his authorized agent or the system installer.
(5) While a sewage disposal system in an area
of special concern is under construction, the local director of health may
require that the construction, be supervised by a professional engineer
registered in the State of Connecticut, if in the opinion of the local director
of health it is necessary to insure conformance to the plans approved or
because of the difficulties likely to be encountered. The engineer shall make a
record drawing of the sewage disposal system, as installed, which he shall
submit to the local director of health prior to issuance of a discharge
permit.
(6) In such areas of
special concern, the Commissioner of Health Services or the local director of
health who has been approved by the Commissioner to review engineering plans in
areas of special concern pursuant to Section
19-13-B103e(b)
may require a study of the capacity of the surrounding natural soil to absorb
or disperse the expected volume of sewage effluent without overflow, breakout,
or detrimental effect on ground or surface waters.
(f)
Gray water systems. Disposal
systems for sinks, tubs, showers, laundries and other gray water from
residential buildings, where no water flush toilet fixtures are connected,
shall be constructed with a septic tank and leaching system at least one-half
the capacity specified for the required residential sewage disposal
system.
