New sanitary sewers and all extensions to sanitary
sewers owned and operated by the Village of Clyde 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 the NYSDEC. Plans and specifications shall
be submitted to and written approval shall be obtained from the Supervisor,
the NYSDOH, and the 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 the approval of the Supervisor and the NYSDOH in accordance with §
148-24. 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 Clyde expenses incidental thereto, including fees for engineering review. 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 §§
148-27 through
148-30, 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 Supervisor, without prior notice. The Supervisor shall determine whether the work is proceeding in accordance with the approved plans and specifications, and whether the completed work will conform with the approved plans and specifications. The sewer, as constructed, must pass the infiltration test (or the exfiltration test, with prior approval), required in §§
148-31 through
148-36, before any building lateral is connected thereto. The Supervisor 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 Clyde Board until such construction inspections have been made so as to assure the Village of Clyde Board of compliance with this chapter and any amendments or additions thereto. The Supervisor 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 Supervisor shall report all findings of inspections and tests to the Village of Clyde 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 §
148-24 and shall be clearly shown and detailed on the plans and specifications submitted for approval. Additional force main details are covered in §
148-37. When requested, the applicant shall submit, to the Supervisor and to the NYSDOH, 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.
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 Clyde. 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 Supervisor,
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. 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 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.
In lieu of hydrostatic testing (exfiltration
or infiltration), 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. The air test shall be based on the time, measured in seconds,
for the air pressure to drop from 3.5 psi to 2.5 psi. Acceptance is
based on limits stated in ASTM Specification C 828. 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. 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. The test gauge shall have
been recently calibrated, and a copy of the calibration results shall
be made available to the Supervisor prior to testing.
Force mains serving sewage lifting devices, such as grinder pumps and pump stations, shall be designed in accordance with §
148-24. Additional design requirements are:
A. Trenching, bedding, and backfilling shall be in accordance with §
148-29.
B. Drain valves shall be placed at low points.
C. Automatic air relief valves shall be placed at high
points and at four-hundred-foot intervals on level force main runs.
D. Air relief and drain valves shall be suitably protected
from freezing.
E. When the daily average design detention time in the
force main exceeds 20 minutes, the manhole and sewer line receiving
the force main discharge or the sewage shall be treated so that corrosion
of the manhole and the exiting line are prevented. The corrosion is
caused by sulfuric acid biochemically produced from hydrogen sulfide
anaerobically produced in the force main.
All sanitary sewers and extensions to sanitary
sewers constructed at the applicant's expense, after final approval
and acceptance by the Supervisor, and concurrence by the Village of
Clyde Board, shall become the property of the Village of Clyde, and
shall thereafter be operated and maintained by the Village of Clyde.
Said sewers, after their acceptance by the Village of Clyde, shall
be guaranteed against defects in materials or workmanship for one
year by the applicant. The guarantee shall be in such form and contain
such provision as deemed necessary by the Village of Clyde Board,
secured by a surety bond or such other security as the Village of
Clyde Board may approve.