New sanitary sewers and all extensions to sanitary
sewers owned and operated by the Village of Canton shall be designed
by a professional licensed to practice sewer design in the state,
in accordance with the Recommended Standards for Sewage Works as adopted
by the Great Lakes - Upper Mississippi River Board of State Sanitary
Engineers (Ten State Standards) and in strict conformance with all
requirements of NYSDEC. Plans and specifications shall be submitted
to and written approval shall be obtained from the Superintendent,
the New York State Health Department and NYSDEC before initiating
any construction. The design shall anticipate and allow for flows
from all possible future extensions or developments within the immediate
drainage area.
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 approval in accordance with § 259-28. Said property owner, builder or developer shall pay for the entire installation, including a proportionate share of the treatment plant, intercepting or trunk sewers, pumping stations, force mains and all other Village of Canton expenses incidental thereto. Each street lateral shall be installed and inspected pursuant to Article VI, and inspection fees shall be paid by the applicant prior to initiating construction. Design and installation of sewers shall be as specified in §§ 259-31 and 259-32 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 Superintendent without prior notice. The Superintendent shall determine whether the work is proceeding in accordance with the approved plans and specifications and whether the completed work will conform to the approved plans and specifications. The sewer, as constructed, must pass the infiltration test (or the exfiltration test, with prior approval) required in §§ 259-34 through 259-40 before any building lateral is connected thereto. The Superintendent shall be notified 30 days in advance of the start of any construction actions so that such inspection frequencies and procedures as may be necessary or required may be established. No new sanitary sewers will be accepted by the Village of Canton Board until such construction inspections have been made so as to assure the Village of Canton Board of compliance with this chapter and any amendments or additions thereto. The Superintendent 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 Superintendent shall report all findings of inspections and tests to the Village of Canton Board.
Plans, specifications and methods of installation shall conform to the requirements of this article. Components and materials of wastewater facilities not covered in this chapter, such as pumping stations, lift stations or force mains, shall be designed in accordance with § 259-28 and shall be clearly shown and detailed on the plans and specifications submitted for approval. Force main details are covered in §§ 259-41 and 259-42. When requested, the applicant shall submit all design calculations and other pertinent data to supplement 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 pipe material shall be:
(1)
Reinforced concrete pipe (ASTM C-76). (Note that nonreinforced
concrete pipe shall not be used.)
(2)
Cast-iron pipe - extra heavy (ASTM A-74).
(3)
Polyvinyl chloride (PVC) pipe - heavy wall (ASTM D-3034
and F-679 Type I).
(4)
Ductile iron pipe (ASTM A-746).
(5)
Vitrified clay pipe - extra strength (ASTM C-700).
(Note that standard strength vitrified clay pipe shall not be used.)
(6)
Other pipe materials. Other pipe materials require
prior written approval of the Superintendent before being installed.
B.
The minimum internal pipe diameter shall be eight
inches.
C.
Joints for the selected pipe shall be designed and
manufactured such that o-ring gaskets of the snap-on type are used.
E.
Joint preparation and assembly shall be in accordance
with the manufacturer's recommendations.
B.
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.
PVC pipe shall not be encased in concrete due to its
different coefficients of linear thermal expansion.
A.
Design of all manholes shall be in accordance with
ASTM C-478 and shall be submitted to the Superintendent and shall
receive approval prior to placement.
B.
Manholes shall be placed where there is a change in
slope or alignment and at intervals not exceeding 400 linear feet.
C.
Manholes shall be constructed using precast minimum
four-foot diameter concrete manhole barrel sections and an eccentric
top section conforming to ASTM Specification C-478, with the following
exceptions on wall thickness:
|
Manhole Diameter
(feet)
|
Wall Thickness
(inches)
| |
|---|---|---|
|
4
|
5
| |
|
5
|
6
| |
|
6
|
7
| |
|
6 1/2
|
7 1/2
| |
|
7
|
8
| |
|
8
|
9
|
D.
All sections shall be cast solid, without lifting
holes. Flat top slabs shall be a minimum of eight inches thick and
shall be capable of supporting an H-20 loading.
E.
All joints between sections shall be sealed with an
o-ring rubber gasket meeting the same specifications as pipe joint
gaskets or butyl joint sealant completely filling the joint.
F.
All joints shall be sealed against infiltration. All
metal parts shall be thickly coated with bitumastic or elastomeric
compound to prevent corrosion.
G.
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, plus or
minus 5%, pounds. The minimum combined weight of the light-duty frame
and the cover shall be 420, plus or minus 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.
H.
Internal drop pipes and fittings shall be PVC plastic
sewer pipe in compliance with ASTM D2241. Corrosion-resistant anchors
shall be used to attach the drop pipe to the inside surface of the
manhole barrel.
All sanitary sewers or extensions to sanitary sewers, including manholes, shall satisfy requirements of a final infiltration test before they will be approved and wastewater flow permitted by the Village of Canton. 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 shall be performed by the applicant under the supervision of the Superintendent, who shall have the responsibility for making proper and accurate measurements required. The exfiltration 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 under test and then measuring the loss of water from the pipe section under test by the amount of water which must be added to maintain the original level; however, under no circumstances shall the head at the downstream manhole exceed 10 feet or fill to within six inches of the top of the downstream manhole. Should this condition prevail, the testing methods in §§ 259-39 and/or 259-40 shall be utilized. In this test, the test section must remain filled with water for at least 24 hours prior to taking any measurements. Exfiltration shall be measured by the drop of water level in a standpipe with a closed bottom end or in one of the sewer manholes serving the test section. When a standpipe and plug arrangement is used in the upper manhole in the test section there shall be some positive method for releasing entrapped air prior to taking any measurements.
The test section shall be as ordered or as approved,
but in no event longer than 1,000 feet. In the case of sewers laid
on steep grades, the test length may be limited by the maximum allowable
internal pressure on the pipe and joints at the lower end of the test
section. For purposes of determining the leakage rate of the test
section, manholes shall be considered as sections of forty-eight-inch
diameter pipe five feet long. The maximum allowable leakage rate for
such a section is 1.1 gallons per 24 hours. If leakage exceeds the
allowable rate, then necessary repairs or replacements shall be made
and the section retested.
The test period during which the test measurements
are taken shall not be less than two hours.
Prior to testing, the section shall be lamped.
Any length of pipe 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 rigid ball or mandrel, whose diameter is
95% of the pipe inside diameter, through the pipe. Any length of pipe
with a deflection greater than 5% shall be replaced. The test section
shall be flushed just prior to deflection testing. The test shall
not be performed with a mechanical pulling device.
A.
In lieu of hydrostatic testing (exfiltration or infiltration),
low-pressure air testing may be employed. Low-pressure air tests shall
conform to ASTM Specification C 828. All sections to be tested shall
be cleaned and flushed and shall have been backfilled prior to testing.
Air shall be added until the internal pressure of the test section
is raised to approximately 4.0 psig. The air pressure test shall be
based on the time, measured in seconds, for the air pressure to drop
from 3.5 psig to 2.5 psig.
B.
Acceptance is based on limits tabulated in the Specification
Time Required for a 1.0 psig Pressure Drop in the Uni-Bell PVC Pipe
Association Recommended Practice For Low-Pressure Air Testing of Installed
Sewer Pipe.
C.
Before pressure is applied to the line all connections
shall be firmly plugged. Before the test period starts the air shall
be given sufficient time to cool to ambient temperature in the test
section.
D.
If the test section is below groundwater, the test
pressure shall be increased an amount sufficient to compensate for
groundwater hydrostatic pressure; however, the test pressure shall
not exceed 10 psi.
E.
The pressure test gauge shall have been recently calibrated,
and a copy of the calibration results shall be made available to the
Superintendent prior to testing.
A.
In lieu of hydrostatic testing (exfiltration or infiltration),
vacuum testing may be employed for testing of sewer lines and manholes.
Sewer lines and manholes shall be tested separately. All sewer lines
to be tested shall be cleaned and flushed and shall have been backfilled
prior to testing. The vacuum test shall be based on the time, measured
in seconds, for the vacuum to decrease from 10 inches of mercury (Hg)
to nine inches of mercury for manholes and from seven inches of mercury
to six inches of mercury for sewers.
B.
Acceptance of manholes is based on the following:
|
Manhole Depth
(feet)
|
Manhole Diameter
(feet)
|
Time to Drop 1 inch Hg
(10 inches to 9 inches)
(seconds)
| |
|---|---|---|---|
|
10 or less
|
4
|
120
| |
|
10 to 15
|
4
|
150
| |
|
15 to 25
|
4
|
180
|
C.
For five-foot diameter manholes, add 30 seconds to
the times above.
D.
For six-foot diameter manholes, add 60 seconds to
the times above.
E.
If the test on the manhole fails (the time is less
than that tabulated above), necessary repairs shall be made and the
vacuum test repeated until the manhole passes the test.
F.
Acceptance of sewers (seven inches Hg to six inches
Hg) is based on the time tabulated in the Specification Time Required
for a 0.5 psig Pressure Drop in the Uni-Bell PVC Pipe Association
Recommended Practice For Low-Pressure Air Testing of Installed Sewer
Pipe.
G.
The vacuum test gauge shall have been recently calibrated,
and a copy of the calibration results shall be made available to the
Superintendent prior to testing.
Force mains serving sewage lifting devices, such as grinder pumps and pump stations, shall be designed in accordance with § 259-28. Additional design requirements are as follows:
A.
B.
Anchorages, concrete blocking and/or mechanical restraint
shall be provided when there is a change of direction of 7 1/2°
or greater.
C.
Automatic air relief valves shall be placed at high
points and at four-hundred-foot intervals on level force main runs.
All force mains shall be subjected to hydrostatic
pressure of 150% of the normal operating pressure. The duration of
the test, at pressure, shall be at least two hours. Before conducting
the test the pipe shall be filled with water and all air shall be
expelled. During the test water shall be added, as needed, to maintain
the test pressure. The amount of water added shall be recorded so
as to calculate leakage. Leakage shall not exceed 25 gallons per day
per mile per inch of nominal pipe diameter. During the test the owner
and the Superintendent shall walk the route of the force main and
examine the exposed pipe and the ground covering any backfilled pipe
to discover leaks. Leakage in excess of that specified above shall
be corrected with new material at the owner's expense and the test
repeated. Any observed leaks shall be repaired at the owner's expense.
All sanitary sewers and extensions to sanitary
sewers constructed at the applicant's expense, after final approval
and acceptance by the Superintendent and concurrence by the Village
of Canton Board, shall become the property of the Village of Canton
and shall thereafter be operated and maintained by the Village of
Canton. No sanitary sewer shall be accepted by the Village of Canton
until four copies of as-built drawings have been so filed with the
Superintendent and the Superintendent has approved the submitted drawings.
Said sewers, after their acceptance by the Village of Canton, shall
be guaranteed against defects in materials or workmanship for one
year by the applicant. The guaranty shall be in such form and contain
such provision as deemed necessary by the Village of Canton Board,
secured by a surety bond or such other security as the Village of
Canton Board may approve.
A.
All contractors engaged in connecting house laterals
with sanitary sewers who perform any work within the right-of-way
of any highway shall file a bond in the amount of $5,000 with the
Village of Canton Clerk to indemnify the Village of Canton against
loss, cost, damage or expense sustained or recovered on account of
any negligence, omission or act of the applicant for such a permit
or any of his or their agents arising or resulting directly or indirectly
by reason of such permit or consent or of any act, construction or
excavation done, made or permitted under authority of such permit
or consent. All bonds shall contain a clause that permits given by
the Village of Canton Board may be revoked at any time for just cause.
B.
Before commencing work, the above contractor shall
file insurance certificates with the Village of Canton Clerk for the
following:
(1)
Workman's compensation and employer's liability insurance
as required by the laws of the state covering the contractor.
(2)
Personal injury liability having limits of not less
than $500,000 each occurrence and $500,000 aggregate (completed operations/products
and personal injury).
(3)
Property damage liability having limits of not less
than $500,000 for all damages arising during the life of the contract,
and shall include, but not be limited to, the following designated
hazards:
C.
All insurance policies must provide for 10 business
days' notice to the Village of Canton before cancellation and must
cover all liabilities of the Village of Canton and be in a satisfactory
form approved by the Board.
D.
The minimum insurance limits stated above shall be
subject to periodic review by the Canton Village Board and adjustments
made, by resolution, as appropriate.
E.
Where it is necessary to enter upon or excavate any
highway or cut any pavement, sidewalk or curbing, permission must
be obtained from the Superintendent of Highways if a Village of Canton
highway is involved, from the County Department of Public Works if
a county highway is involved and/or the New York State Department
of Transportation if a state highway is involved.
