New sanitary sewers and all extensions to sanitary sewers owned and
operated by the Village of Oxford shall be designed 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 Wastewater
Treatment Operator and the NYSDEC before initiating any construction.
A.Â
Approval; fees; inspection; testing; reporting. 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 Wastewater Treatment Operator in accordance with § 230-22. 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 Oxford 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. The design and installation of sewers shall be as specified in §§ 230-24 through 230-28 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 Wastewater Treatment Operator. The Wastewater Treatment Operator shall determine whether the work is proceeding in accordance with the approved plans and specifications, and whether the 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 § 230-25, before any building lateral is connected thereto. The Wastewater Treatment Operator shall be notified 30 days in advance of the start of any construction actions so that such inspection frequencies as may be necessary or required may be established. No new sanitary sewers will be accepted by the Village of Oxford Board until such construction inspections have been made, so as to assure the Village of Oxford Board of compliance with this chapter and any amendments or additions thereto. The Wastewater Treatment Operator shall report all findings of inspections and tests to the Village of Oxford Board.
B.Â
Plans, specifications, and pipe test results required. 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 § 230-22 and shall be clearly shown and detailed, on the plans and specifications submitted for approval. When requested, the applicant shall submit to the Wastewater Treatment Operator 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.Â
Sewer pipe specifications.
(1)Â
Sewer pipe material shall be:
(a)Â
Reinforced-concrete pipe. (Note that nonreinforced concrete
pipe shall not be used.)
[1]Â
The pipe and specials shall conform to ASTM Specification
C-76. The reinforcing wire cage shall conform to ASTM Specification A-15,
A-82, or A-185, as appropriate.
[2]Â
Water absorption and three-edge bearing tests shall conform
to ASTM Specification C-497.
[3]Â
Gaskets shall conform to Sections 3.3 and 3.4 of AWWA
Specification C-302.
(3)Â
Polyvinyl chloride (PVC) pipe, heavy wall.
(a)Â
Pipe shall be made from Class 12454-B materials or better
in accordance with ANSI/ASTM Specification D-1784.
(4)Â
Ductile-iron pipe.
(a)Â
Pipe, fittings and specials shall be manufactured in
accordance with ASTM Specification A-746. Pipe shall have a minimum thickness
of Class 50.
(b)Â
Fittings shall conform to ANSI Specification A-21.11
and have a minimum pressure class rating of 150 PSI.
(c)Â
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.
(d)Â
Closure pieces shall be jointed by means of a mechanical
coupling of the cast sleeve type.
(5)Â
Vitrified-clay pipe, extra-strength. (Note that standard
strength verified clay pipe shall not be used.) Pipe shall conform to the
current requirements of NCPI Specification ER 3300-67 and meet the requirements
of ASTM Specification C-700.
(6)Â
Acrylonitrile-butadiene-styrene (ABS) pipe. Pipe and
fittings shall conform to the requirements of ASTM Specification D-2661.
B.Â
Other requirements.
(1)Â
The minimum internal pipe diameter shall be eight inches.
(2)Â
Joints for the selected pipe shall be designed and manufactured
such that O-ring gaskets of the snap-on type are used.
(3)Â
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 § 230-25 are met.
(4)Â
Joint preparation and assembly shall be in accordance
with the manufacturer's recommendations.
C.Â
Safety and load factors.
(2)Â
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.
D.Â
Sewer pipe installation.
(1)Â
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)Â
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)Â
The public shall be protected from personal and property
damage as a result of the construction work.
(4)Â
Traffic shall be maintained at all times in accordance
with applicable highway permits. Where no highway permits are required, at
least one-half (1/2) of a street shall be kept open for traffic flow.
(5)Â
Erosion control shall be performed throughout the project
to minimize the erosion of soils into lands 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)Â
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.
(7)Â
Under ordinary conditions, excavation shall be by open
cut from the ground surface. However, tunnelling or boring under structures
other than buildings may be permitted. Such structures include crosswalks,
curbs, gutters, pavements, trees, driveways and railroad tracks.
(8)Â
Open trenches shall be protected at all hours of the
day with barricades, as required.
(9)Â
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
Wastewater Treatment Operator. When work is not in progress, including overnight,
weekends and holidays, the trench shall be backfilled to ground surface.[2]
(10)Â
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)Â
Ledge rock, boulders and large stones shall be removed
from the trench sides and bottom. The trench shall be overexcavated at least
12 inches for five feet, at the transition from rock bottom to earth bottom,
centered on the transition.
(12)Â
Maintenance of grade, elevation and alignment shall be
done by some suitable method or combination of methods.
(14)Â
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)Â
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 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)Â
The pipe barrel shall be supported along its entire length
on a minimum of six inches of crusher run max, one-half (1/2) inch stone.
This foundation shall be firmly tamped in the excavation.
(17)Â
Bell holes shall be hand excavated, as appropriate.
(18)Â
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)Â
The joints shall be made and the grade and alignment
checked and made correct.
(20)Â
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)Â
The pipe shall be in straight alignment.
(22)Â
The remaining portion of the trench above the pipe embedment
shall be backfilled in foot lifts which shall be firmly compacted. Compaction
near or 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.
E.Â
Manhole installation.
(1)Â
Manholes shall be placed where there is a change in slope
or alignment and at intervals not exceeding 400 linear feet.
(2)Â
Manhole bases shall be constructed of three-thousand-pounds-per-square-inch
(seven-day) concrete 12 inches thick or shall be precast bases properly bedded
in the excavation. Field-constructed bases shall be properly reinforced.
(3)Â
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)Â
All joints between sections shall be sealed with an O-ring
rubber gasket, meeting the same specifications as pipe joint gaskets.
(5)Â
All joints shall be sealed against infiltration.
(6)Â
No steps or ladder rungs shall be in the manhole walls.
(7)Â
All precast sections shall be produced at a plant which
is approved by the NYSDOT for manufacture of concrete pipe.
(8)Â
The elevation of the top section shall be such that the
cover frame top elevation is zero and five-tenths (0.5) foot above the one-hundred-year
flood elevation (in a field) zero and five-tenths (0.5) foot above a lawn
elevation or at finished road grade.
(9)Â
The manhole frame and cover shall be heavy-duty cast
iron. The cover shall be 24 inches in diameter. The minimum combined weight
of the frame and the cover shall be 400 pounds. The mating surfaces shall
be machined and painted with tar pitch varnish. Covers shall have "Sanitary
Sewer" cast into them. Covers shall have two pick holes 180° apart. The
pick holes shall be designed so that infiltration is prevented.
(10)Â
Benches shall be level and slope to the flow channel
at about one inch per foot.
(11)Â
The minimum depth of the flow channel shall be the nominal
diameter of the larger pipe. The channel shall have a steel towel finish.
(12)Â
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.Â
Infiltration/exfiltration testing. 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 Oxford. The infiltration rate shall not exceed
100 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 Wastewater Treatment Operator, who shall have the responsibility
for making the 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
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.[1]
B.Â
Test section. 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 4.5 gallons
per 24 hours. If leakage exceeds the allowable rate, then necessary repairs
or replacements shall be made and the section retested.
C.Â
Test period. The test period, during which the test measurements
are taken, shall not be less than two hours.
D.Â
Pipe lamping. Prior to testing, the section shall be
lamped. Any joint of straight alignment shall be realigned.
E.Â
Air testing alternative.
(1)Â
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.
(2)Â
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.
(3)Â
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.
All sanitary sewers and extensions to sanitary sewers constructed at
the applicant's expense, after final approval and acceptance by the Wastewater
Treatment Operator, and concurrence by the Village of Oxford Board, shall
become the property of the Village of Oxford and shall thereafter be operated
and maintained by the Village of Oxford. Said sewers, after their acceptance
by the Village of Oxford, 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 Oxford
Board, secured by a surety bond or such other security as the Village of Oxford
Board may approve.
No property owner, builder or developer shall be issued a building permit
for a new dwelling or structure requiring sanitary facilities unless a suitable
and approved method of wastewater disposal, conforming to this chapter, is
available. All housing construction or building development which takes place
after this chapter is enacted shall provide for an approved system of sanitary
sewers.
A.Â
All contractors engaged in connecting laterals with sanitary
sewers and 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 Oxford Clerk to indemnify
the Village of Oxford against any and all losses, cost, damages or expenses
sustained or recovered on account of negligence, omissions or acts of such
contractor arising or resulting, directly or indirectly, by reason of any
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
providing that permits given by the Village of Oxford Board may be revoked
at any time for just cause.
B.Â
C.Â
The policies shall cover the operation of motor vehicles
and the use of explosives and blasting. All insurance policies must provide
for five days' notice to the Board before cancellation and must cover
all liabilities of the Village of Oxford Board and be in a form satisfactory
to the Board.
D.Â
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 the Village Department of Public Works if a Village
of Oxford roadway is involved, from the County Department of Public Works
if a county highway is involved and the New York State Department of Transportation
if a state highway is involved.