New sanitary sewers and all extensions to sanitary sewers owned and
maintained by the Village shall be designed by a professional engineer licensed
to practice sewer design in New York State, in accordance with the Great Lakes
- Upper Mississippi River Board of State Sanitary Engineers (Ten State Standards),
and in strict conformance with all requirements of the New York State Department
of Environmental Conservation, as required. Plans and specifications shall
be submitted to, and written approval shall be obtained from, the Village
Engineer, the Madison County Health Department and the New York State Department
of Environmental Conservation before construction may proceed. The design
of sewers shall anticipate and allow for flows from all possible future extensions
or developments within the immediate drainage area, being compatible with
the master sewer plan adopted by the Village Board of Trustees.
A.
When a property owner, builder or developer proposes to construct sanitary sewers or extensions to sanitary sewers in an area proposed for subdivision, the plans, specifications and method of installation shall be subject to the approval of the Village Engineer in accordance with § 136-11. Said property owner, builder or developer shall pay for the entire installation, including a proportionate share of the cost of the treatment plant, intercepting or trunk sewers, pumping stations, force mains and all other Village expenses incidental thereto. Each building lateral and street lateral must be installed and inspected pursuant to Article V, and the inspection fees shall be paid by the applicant prior to initiating construction. Design and installation of sewers shall be as specified in § 136-13 and in conformance with Paragraphs 3 through 6 of ASTM Specification C-12. The installation of the sewer shall be subject to periodic inspection by the Public Works Administrator or the Village Engineer if so designated, and the expenses of this inspection shall be paid for by the owner, builder or developer as provided in Article VII. The Public Works Administrator's decisions shall be final in matters of quality and methods of construction. The sewer, as constructed, must pass the infiltration test (or the exfiltration test, with prior approval) in § 136-14 before any building lateral is connected thereto. The Public Works Administrator shall be notified 30 days in advance of the start of construction operations so that such inspection procedures as may be necessary or required may be established. No sanitary sewers will be accepted by the Village Board of Trustees until such inspections of construction have been made so as to assure the Village Board of Trustees of compliance with these regulations and any amendments or additions thereto. The Public Works Administrator has the authority to require such excavation as necessary to inspect any installed facilities if the facilities were covered or otherwise backfilled before they were inspected so as to permit inspection of the construction. The Public Works Administrator shall report all findings of inspections and tests to the Village Board of Trustees.
B.
Plans, specifications and methods of installation shall conform to the requirements of Articles IV, V and VI. Components and materials of sewage works installations not covered in this chapter such as pumping stations, lift stations or force mains shall be designed in accordance with § 136-11 and shall be clearly shown and detailed on the plans and specifications submitted for approval. When requested, the owner, builder or developer of the proposed installation shall submit to the Village Engineer all design calculations and other pertinent data to supplement the Village Engineer's review of the plans and specifications. Results of manufacturer's tests on each lot of pipe delivered to the job site shall also be furnished, upon request.
A.
Sewer design shall be in accordance with the following
provisions:
(1)
Sewer pipe material shall be:
(a)
Reinforced concrete pipe. (Note that nonreinforced concrete
pipe shall not be used.)
[1]
The pipe and specials shall conform to ASTM Specification
C-76.
[2]
The reinforcing wire cage shall conform to ASTM Specification
A-15, A-82 or A-185, as appropriate.
[3]
Water absorption and three-edge bearing tests shall conform
to ASTM Specification C-497.
[4]
Gaskets shall conform to Sections 3.3 and 3.4 of AWWA
Specification C-302.
(c)
Polyvinyl chloride (PVC) pipe - heavy wall.
[1]
Pipe shall be made from Class 12454-B materials or better
in accordance with ANSI/ASTM Specification D-1784.
[2]
Pipe and accessories shall conform to the requirements
of the following, with a minimum pipe stiffness of 46 psi at a maximum deflection
of 5%:
|
ANSI/ASTM
|
D-3034
|
(4 inches to 15 inches)
| |
|
ASTM
|
F-679
|
(18 inches to 27 inches)
|
(d)
Ductile iron pipe.
[1]
Pipe, fittings and specials shall be manufactured in
accordance with ASTM Specification A-746. Pipe shall have a minimum thickness
of Class 50.
[2]
Fittings shall conform to ANSI Specification A-21.11
and have a minimum pressure class rating of 150 psi.
[3]
All pipe and fittings shall be cement mortar lined in
accordance with ANSI Specification A-21.4 at twice the specified thickness,
and have an internal and external bituminous seal coating.
[4]
Closure pieces shall be jointed by means of a mechanical
coupling of the cast sleeve type.
(e)
Acrylonitrile-butadiene-styrene (ABS) pipe. Pipe and
fittings shall conform to the requirements of ASTM Specification D-2661.
(f)
Other pipe materials. Other pipe materials require prior
written approval of the Village Engineer before being installed.
(2)
The minimum internal pipe diameter shall be eight inches.
(3)
Joints for the selected pipe shall be designed and manufactured
such that "O" ring gaskets of the "snap-on" type are used.
(4)
Gaskets shall be continuous, solid, natural or synthetic rubber, and shall provide a positive compression seal in the assembled joint, such that the requirements of § 136-14 are met.
(5)
Joint preparation and assembly shall be in accordance
with the manufacturer's recommendations.
B.
Pipe class and design.
(2)
Utilizing the foregoing information, design shall be
made as outlined in Chapter IX of the Water Pollution Control Federation Manual
of Practice No. 9, latest edition, "Design and Construction of Sanitary and
Storm Sewers," and the pipe shall have sufficient structural strength to support
all loads to be placed on the pipe, with a safety factor as specified above.
C.
Sewer pipe installation.
(1)
Local utilities shall be contacted to verify construction
plans and to make arrangements to disconnect all utility services, where required
to undertake the construction work. The utility services shall later be reconnected.
The work shall be scheduled so that there is minimum inconvenience to local
residents. Residents shall be provided proper and timely notice regarding
disconnection of utilities.
(2)
The construction right-of-way shall be cleared only to
the extent needed for construction. Clearing consists of removal of trees
which interfere with construction, removal of underbrush, logs and stumps,
and other organic matter, removal of refuse, garbage and trash, removal of
ice and snow, and removal of telephone and power poles, and posts. Any tree
which will not hinder construction shall not be removed, and shall be protected
from damage by any construction equipment. Debris shall not be burned, but
hauled for disposal in an approved manner.
(3)
The public shall be protected from personal and property
damage as a result of the construction work.
(4)
Traffic shall be maintained at all times in accordance
with applicable highway permits. Where no highway permits are required, at
least 1/2 of a street shall be kept open for traffic flow.
(5)
Erosion control shall be performed throughout the project
to minimize the erosion of soils onto lands or into waters adjacent to or
affected by the work. Erosion control can be effected by limiting the amount
of clearing and grubbing prior to trenching, proper scheduling of the pipe
installation work, minimizing time of open trench, prompt grading and seeding,
and filtration of drainage.
(6)
The trench shall be excavated only wide enough for proper
installation of the sewer pipe, manhole and appurtenances. Allowances may
be made for sheeting, dewatering and other similar actions to complete the
work. Roads, sidewalks and curbs shall be cut, by sawing, before trench excavation
is initiated.
(7)
Under ordinary conditions, excavation shall be by open
cut from the ground surface. However, tunneling or boring under structures
other than buildings may be permitted. Such structures include crosswalks,
curbs, gutters, pavements, trees, driveways and railroad tracks.
(8)
Open trenches shall be protected at all hours of the
day with barricades, as required.
(9)
Trenches shall not be open for more than 30 feet in advance
of pipe installation nor left unfilled for more than 30 feet in the rear of
the installed pipe, when the work is in progress, without permission of the
Village Engineer. When work is not in progress, including overnight, weekends
and holidays, the trench shall be backfilled to ground surface.
(10)
The trench shall be excavated approximately six inches
deeper than the final pipe grade. When unsuitable soils are encountered, these
shall be excavated and replaced with select materials.
(11)
Ledge rock, boulders and large stones shall be removed
from the trench sides and bottom. The trench shall be over-excavated at least
12 inches for five feet, at the transition from rock bottom to earth bottom,
centered on the transition.
(12)
Maintenance of grade, elevation and alignment shall be
done by some suitable method or combination of methods.
(13)
No structure shall be undercut unless specifically approved
by the Village Engineer.
(14)
Proper devices shall be provided, and maintained operational
at all times, to remove all water from the trench as it enters. At no time
shall the sewer line be used for removal of water from the trench.
(15)
To protect workers and to prevent caving, shoring and
sheeting shall be used, as needed. Caving shall not be used to backfill the
trench. Sheeting shall be not be removed but cut off no lower than one foot
above the pipe crown nor no higher than one foot below final grade, and left
in the trench, during backfill operations.
(16)
The pipe barrel shall be supported, along its entire
length, on a minimum of six inches of crusher run max. one-half-inch stone.
This foundation shall be firmly tamped in the excavation.
(17)
Bell holes shall be hand excavated, as appropriate.
(18)
Pipe shall be laid from low elevation to high elevation.
The pipe bell shall be up-gradient; the pipe spigot shall be down-gradient.
(19)
The joints shall be made, and the grade and alignment
checked and made correct.
(20)
Crushed stone shall be placed over the laid pipe to a
depth of at least six inches. Care shall be exercised so that stone is packed
under the pipe haunches. Care shall be exercised so that the pipe is not moved
during placement of the crushed stone.
(21)
The pipe shall be in straight alignment.
(22)
The remaining portion of the trench above the pipe embedment
shall be backfilled in foot lifts which shall be firmly compacted. Compaction
near/under roadways, driveways, sidewalks and other structures shall be to
95% of the maximum moisture-density relationship, as determined by ASTM Specification
D-698, Method D. Ice, snow or frozen material shall not be used for backfill.
D.
Manhole installation.
(1)
Manholes shall be placed where there is a change in slope
or alignment, and at intervals not exceeding 400 linear feet.
(2)
Manhole bases shall be constructed of 3,000 psi (seven-day)
concrete 12 inches thick, or shall be precast bases properly bedded in the
excavation. Field constructed bases shall be properly reinforced.
(3)
Manhole walls shall be constructed using precast minimum
four-foot diameter concrete manhole barrel sections, and an eccentric top
section, conforming to ASTM Specification C-478. All sections shall be cast
solid, without lifting holes.
(4)
All joints between sections shall be sealed with an "O"
ring rubber gasket, meeting the same specifications as pipe joint gaskets.
(5)
All joints shall be sealed against infiltration.
(6)
Steps or ladder rungs shall be at the discretion of the
Village Engineer.
(7)
All precast sections shall be produced at a plant which
is approved by the NYSDOT for manufacture of concrete pipe.
(8)
The elevation of the top section shall be such that the
cover frame top elevation is 0.5 foot above the one-hundred-year-flood elevation
(in a field), 0.5 foot above a lawn elevation, or at finished road or sidewalk
grade.
(9)
When located in a traveled area (road or sidewalk), the
manhole frame and cover shall be heavy-duty cast iron. When located in a lawn
or in a field, the manhole frame and cover may be light-duty cast iron. The
cover shall be 36 inches in diameter. The minimum combined weight of the heavy-duty
frame and the cover shall be 735 +/- 5% pounds. The minimum combined weight
of the light-duty frame and the cover shall be 420 +/- 5% pounds. The mating
surfaces shall be machined, and painted with tar pitch varnish. The cover
shall not rock in the frame. Infiltration between the cover and frame shall
be prevented by proper design and painting. Covers shall have "Sanitary Sewer"
cast into them. Covers shall have lifting holes suitable for any lifting/jacking
device. The lifting holes shall be designed so that infiltration is prevented.
(10)
Benches shall be level and slope to the flow channel
at about one inch per foot.
(11)
The minimum depth of the flow channel shall be the nominal
diameter of the smaller pipe. The channel shall have a steel trowel finish.
The flow channel shall have a smooth curvature from inlet to outlet.
(12)
Manhole frames shall be set in a full bed of mortar with
no less than two nor more than nine courses of brick underneath to allow for
later elevation adjustment.
A.
All sanitary sewers or extensions to sanitary sewers,
including manholes, shall satisfy requirements of a final infiltration test
before they will be approved and sewage flow permitted by the Village. The
infiltration rate shall not exceed 25 gallons per 24 hours per mile per nominal
diameter in inches. An exfiltration test may be substituted for the infiltration
test; the same rate shall not be exceeded. The exfiltration test required
herein shall be performed by the property owner, builder or developer under
the supervision of the Village Engineer or Public Works Administrator or persons
designated by either of them, who shall have the responsibility for making
the proper and accurate measurements required. This test consists of filling
the pipe with water to provide a head of at least five feet above the top
of the pipe or five feet above groundwater, whichever is higher, at the highest
point of the pipeline under test, and then measuring the loss of water from
the line by the amount which must be added to maintain the original level.
In this test, the line must remain filled with water for at least 24 hours
prior to the taking of measurement. Exfiltration shall be measured by the
drop of water level in a standpipe with closed bottom end, or in one of the
sewer manholes serving the test section.[1]
B.
When a standpipe and plug arrangement is used in the
upper manhole of a line under test, there must be some positive method of
releasing entrapped air in the sewer prior to taking measurements. The test
length intervals for either type of test shall be as ordered or approved but
in no event shall they exceed 1,000 feet. In the case of sewers laid on steep
grades, the length of line to be tested by exfiltration at any one time may
be limited by the maximum allowable internal pressure on the pipe and joints
at the lower end of the line. The test period, wherein the measurements are
taken, shall not be less than two hours in either type of test.
C.
The total leakage of any section tested shall not exceed
the rate of 100 gallons per mile of pipe per 24 hours per inch of manufacturer's
designation of internal pipe diameter. For purposes of determining the maximum
allowable leakage, manholes shall be considered as sections of forty-eight-inch
diameter pipe, five feet long. The equivalent leakage allowance shall be 4.5
gallons per manhole per 24 hours for forty-eight-inch diameter manholes. If
leakage exceeds the specified amount, the necessary repairs or replacements
required shall be made to permanently reduce the leakage to within the specified
limit, and the tests shall be repeated until the exfiltration test is met.
D.
Prior to testing, the section shall be lamped. Any "joint"
out of straight alignment shall be realigned. Also prior to testing, all plastic
pipe, in the test section, shall be tested for deflection. Deflection testing
shall involve the pulling of a ball, whose diameter is 95% of the pipe inside
diameter, through the pipe. Any "joint" with a deflection greater than 5%
shall be replaced. The test section shall be flushed just prior to deflection
testing.[2]
All sanitary sewers and extensions to sanitary sewers constructed at
the property owner's, builder's or developer's expense, after
final approval and acceptance by the Village Engineer, shall become the property
of the Village and shall thereafter be maintained by the Village. Said sewers,
after their acceptance by the Village, shall be guaranteed against defects
in materials or workmanship, for one year by the builder or developer. The
guaranty shall be in such form and contain such provisions as required by
the Village Board of Trustees, secured by a surety bond or such other security
as the Village Board of Trustees may approve.
No property owner, builder or developer shall be issued a building permit
for a new dwelling or structure requiring sanitary facilities within the Village
unless a suitable and approved method of disposal of sewage conforming to
the provisions of this chapter is proposed. All housing construction or building
development which takes place after these regulations are enacted shall provide
for an approved system of sanitary sewers.
Any person constructing, or causing to be constructed, sewage works
or any part thereof or private sewage disposal facilities must present a certificate
of insurance showing suitable liability insurance before a permit will be
issued for construction of same.
