[Added 12-13-2021 by Ord.
No. 2021-35]
(a)
Sewer extensions require a treatment works approval, issued by the
N.J.D.E.P., pursuant to N.J.S.A. 58:10A-6 et seq., N.J.A.C. 7:14A-22
et seq. and N.J.A.C. 7:14A-23 et seq.
(b)
Any activity that increases the projected flow to the sanitary sewer
system by 2,000 gallons per day or more shall require approval from
SBRSA, irrespective of whether or not construction of additional sewer
infrastructure is involved.
(c)
The sewer engineer may execute "certification of consent by the governing
body" and "certification of consent by the wastewater conveyance system
owner" on treatment works approval applications as part of any development
submission to the N.J.D.E.P. or SBRSA for sewer extensions, upon the
sewer engineer's determination that the conveyance system has adequate
capacity and that the proposed sewer extension conforms with the requirements
and conditions of all municipal ordinances, resolutions and regulations
and otherwise should be approved consistent with the health, safety
and welfare of the Princeton community. Every request for a certification
of consent shall be accompanied by a completed treatment works approval
application.
(d)
The cost to design, permit, and construct a sewer extension shall
be wholly borne by the party or parties seeking the sewer extension.
(e)
During the construction of a sewer extension, the trench shall not
be backfilled until so ordered by the sewer engineer. The permittee
shall provide at least three business days' prior notice to the sewer
engineer to enable said engineer or said engineer's representative
to examine the work before ordering the backfilling to be completed.
Any part of the work which may have been covered without previously
obtaining the consent of the sewer engineer shall be uncovered for
examination, if so ordered by the sewer engineer. The backfilling
around the sewer extension shall be so executed as not to injure the
joints of the pipes, and the backfilling generally shall be so compacted
as to permit the restoration of the ground surface as nearly as possible
to its former condition or to the approved proposed condition. No
sewage will be permitted to discharge into the sewer extension and
no permanent connection shall be made to the sanitary sewer system
until tests have been made and the sewer found to conform to the sewer
engineer's specifications.
[Added 12-13-2021 by Ord.
No. 2021-35]
(a)
The planning, design, construction, installation, modification, testing,
and operation of any sanitary sewer shall be in accordance with the
criteria set forth in N.J.A.C. 7:14A-23 et seq.; the New Jersey Residential
Site Improvement Standards; the applicable N.J.D.E.P. rules implementing
the New Jersey Water Pollution Control Act (N.J.S.A. 58:10A-1 et seq.);
the New Jersey Water Quality Planning Act (N.J.S.A. 58:11A-1 et seq.);
and for items not covered by N.J.D.E.P. rules, the ASCE Manual on
Engineering Practice No. 60.
(b)
The following requirements shall also apply to the planning, design,
construction, installation, modification, testing, and operation of
any sanitary sewer:
(1)
Sanitary sewers shall be designed to be self-cleansing using
the tractive force approach as described in Chapter 5 of the ASCE
Manual on Engineering Practice No. 60 or by ensuring a minimum velocity
of 2.5 feet per second during daily peak flow. Calculations shall
use the projected flows for the sewer reach, not pipe-full flows.
Where minimum slope requirements for self-cleansing cannot be met
due to topographical or downstream constraints, or are otherwise technically
impracticable, reduced slopes may be accepted so long as the slopes
are maximized within the limits of said constraints;
(2)
Maintenance holes shall be designed to minimize turbulence and
energy loss. The difference in the invert elevations of the upstream
and downstream pipes in a maintenance hole should not be larger than
necessary to maintain a smooth energy grade line and water surface
when accounting for changes in slope, direction, diameter, or number
of pipes. Excessive differences in invert elevations and drop connections
shall be avoided whenever technically practicable, where such features
are not necessary to prevent excess fluid velocities or avoid utility
conflicts. All drop connection piping must be exterior to the maintenance
hole in an outside drop connection configuration;
(3)
A flexible urethane, polyurea, or other elastomer-based coating
shall be applied to the exterior of block and brick maintenance holes
and to the chimney section of precast concrete maintenance holes to
prevent groundwater infiltration. Only products manufactured for this
intended use that maintain high adhesive and elastic properties through
the product's life shall be used. Coatings shall be applied according
to manufacturer's recommendations and shall extend three or more inches
onto the maintenance hole frame to prevent water intrusion at the
frame and chimney interface; and
(4)
Sanitary sewers shall be constructed to be watertight. Mandrel
testing, closed-circuit television video inspections, and infiltration/exfiltration
or low-pressure air testing shall be conducted, and identified defects
and deficiencies shall be corrected prior to placing the sewer into
service. Testing methods shall be conducted in accordance with the
ASCE Manual on Engineering Practice No. 60 and applicable ASTM standards.
If construction is performed on an existing active sewer, such testing
may be performed after the sewer is placed into service where necessary
to prevent an interruption of service to connected properties. Low-pressure
air testing of active sewers may be substituted for joint-by-joint
and lateral testing using test and seal packers.
(c)
The person responsible for constructing a sewer extension or other
sanitary sewer work shall obtain any and all necessary approvals from
the owners of property on which the work shall be completed, including
Princeton. Easements or deed restrictions shall be required for all
sanitary sewers which are not within a municipal right-of-way, and
shall be subject to the review and approval of the municipal attorney
prior to recording. This includes private sanitary sewers located
on property owned by the same person which owns and operates the private
sanitary sewer. Such easements and/or deed restrictions shall include
provisions to prevent the construction of buildings, or other permanent
structures; prevent the construction of stormwater management practices
designed to infiltrate stormwater into the ground; and prevent the
growth of woody vegetation within the easement or deed restriction
limits. Easements or deed restrictions shall provide for a minimum
width of 20 feet for sanitary sewers that are not more than 15 feet
deep. For sewers that are more than 15 feet deep, easements or deed
restrictions shall provide for a minimum width of 30 feet.
[Added 12-13-2021 by Ord.
No. 2021-35]
No sewer pipe shall be laid within one foot of a water, gas,
or other utility pipe or according to the applicable standards under
State or federal statute or regulation, whichever one is more stringent.
Likewise, no water, gas, or other utility pipe shall be laid within
one foot of a sewer pipe or according to the applicable standards
under State or federal statute or regulation, whichever one is more
stringent.
