New sanitary sewers and all extensions to sanitary sewers owned
and maintained by the City shall be properly designed in accordance
with the Recommended Standards for Sewage Works, as adopted by the
Great Lakes — Upper Mississippi River Board of State
Sanitary Engineers, and in strict conformance with all requirements
of the New York State Department of Environmental Conservation. Plans
and specifications shall be submitted to, and approval obtained from,
the City Engineer, Oswego County Health Department and 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.
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 City Engineer and the Oswego County Health Department in accordance with § 514-10. Said property owner, builder or developer shall pay for the entire installation, including a proportionate share of the cost of a treatment plant, intercepting or trunk sewers, pumping stations, force mains and all other City expenses incidental thereto. Each street lateral must be installed and inspected pursuant to Article V, and the inspection fees shall be paid by the applicant. Design and installation of sewers shall be as specified in § 514-12 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 enforcement officer. The enforcement officer shall determine if the work is proceeding in accordance with the plans and specifications and that the work will conform to the plans and specifications. The sewer, as constructed, must pass the exfiltration test required in § 514-13, before any building lateral is connected thereto. The enforcement officer shall be notified 60 days in advance of the start of construction operations so that such inspection procedures as may be necessary or required may be established. No new sanitary sewers will be placed into operation until accepted by the Common Council. No new sanitary sewers will be accepted by the Common Council until such inspections of construction have been made as will assure the Common Council of compliance with these regulations and any amendments or additions thereto. The enforcement officer shall report all findings of inspections and tests to the Common Council.
B.
Plans, specifications and methods of installation shall conform to the requirements of Articles IV, V and VI. Components and materials of wastewater facilities installations not covered in this chapter, such as pumping station, lift stations or force mains, shall be designed in accordance with § 514-10 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 City Engineer and the Oswego County Health Department 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 shall also be furnished upon request.
A.
Sewer design shall be in accordance with the following provisions:
(1)
Pipe material shall be either asbestos-cement conforming to ASTM
Specification C-428, Type II (minimum Class 2400); reinforced concrete
conforming to ASTM Specification C-76; or polyvinyl chloride (PVC)
pipe and fittings conforming to ASTM Specification D3034-73, SDR-35
Polyvinyl Chloride Sewer Pipe and Fittings.
(2)
No standard-strength clay pipe or nonreinforced concrete pipe shall
be used.
(3)
The minimum internal pipe diameter shall be eight inches.
(4)
Joints for each kind of pipe shall be designed and manufactured such
that O-ring gaskets of the snap-on type are employed.
(5)
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 § 514-13 are met.
(6)
Joint preparation and assembly shall be in accordance with the manufacturer's
recommendations.
B.
Pipe class and design.
(1)
Selection of pipe class shall be predicated on the following criteria:
|
Criterion
|
Amount
| |
|---|---|---|
|
Safety factor
|
1.5
| |
|
Load factor
|
1.7
| |
|
Weight of soil (pounds per cubic foot)
|
120
| |
|
Wheel loading (pounds)
|
16,000
|
(2)
Utilizing the forgoing information, design shall then be made as
outlined in Chapter IX of the Water Pollution Control Federation Manual
of Practice No. 9, Design and Construction of Sanitary and Storm Sewers,
and pipe shall have sufficient structural strength to support all
loads to be placed on the pipe with a safety factor as specified above.
C.
Pipe shall be firmly and uniformly bedded in a minimum depth of six
inches of crusher run (NYSDOT specification); the trench shall be
excavated approximately six inches deeper than the bottom of the pipe
prior to installation of the bedding material. All pipe shall be supported
by a firm foundation. When unsuitable foundation conditions are encountered,
in the judgment of the enforcement officer, an artificial pipe foundation
shall be created utilizing a concrete cradle under and around the
bottom half of the pipe. The trench shall be excavated below the bedding
line to the prescribed depth for subsequent installation of the required
foundation, all as directed by the enforcement officer.
D.
Manholes.
(1)
Manholes shall be constructed at all changes in slope and alignment
and at intervals not exceeding 400 linear feet.
(2)
Manhole bases shall be constructed of poured three-thousand-pound-per-square-inch
concrete 12 inches thick or precast concrete bases, if approved by
the enforcement officer, prior to installation.
(3)
Bench walls and flow channels shall be carefully sloped for smooth
flow and have a steel trowel finish. Top of bench walls shall be at
a level even with the top of the pipe.
(4)
Manhole walls shall be constructed using precast four-foot-diameter
concrete manhole barrel sections and a concentric tapered top section
conforming to ASTM Specification C-478. Barrel sections and top sections
shall be cast solid, without lifting holes. All joints between manhole
sections shall be O-ring rubber gaskets, meeting the same specifications
as pipe joints, and shall be sealed against infiltration. No steps
or ladder rungs shall be installed in the manhole walls. All precast
sections shall be produced at a plant which is approved by the NYSDOT
for the manufacture of concrete pipe.
(5)
The manhole frame and cover shall be heavy-duty cast iron as manufactured
by Neenah Foundry Company or its equal. Twenty-four-inch frames and
covers shall be Neenah Catalog No. 1642 with Type C cover or shall
be the standard adopted by the City.
(6)
Manhole frames and covers shall have a minimum combined weight of
400 pounds and shall have a minimum height of seven inches and a clear
opening of 24 inches.
(7)
Covers shall be marked "sanitary sewer" and have two pick holes at
least one inch in width and 1 1/2 inches long, 180° apart.
(8)
Frames and covers shall have machined bearing surfaces and shall
be painted with tar pitch varnish.
(9)
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 adjustment in elevation. Manhole frames shall be set so that
the top conforms to the adjacent road grade, slope and pitch.
A.
All sanitary sewers or extensions to sanitary sewers shall satisfy
requirements of a final exfiltration test before they will be approved
and wastewater flow permitted by the City. The exfiltration test required
herein shall be performed by the property owner, builder or developer
under the supervision of the City Engineer or enforcement officer,
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 available for convenient measuring.
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 in 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 the 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.
A.
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 City Engineer, shall become the property
of the City and shall thereafter be maintained by the City.
B.
Said sewers, after their acceptance by the City, 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 is required by the Common Council, secured by a surety
bond or such other security as the Common Council 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 City unless a suitable and approved method of disposal
of wastewater 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 wastewater
facilities or any part thereof or private wastewater disposal facilities
must present a certificate of insurance showing a minimum liability
insurance of $100,000 before a permit will be issued for construction
of the same.
