[Adopted 7-19-1966 by Ord. No. 88 (Ch. 18, Part 2, of the
1995 Code of Ordinances)]
[Amended 4-26-1995 by Ord. No. 505]
A.
The construction of sanitary sewers shall not start until the following
conditions are met:
(1)
The plans for the sanitary sewers showing lines and grades of the
pipe, the location of manholes, the location and design of pump stations
or sewage plants and any other related matter must be approved by
the Township of Hampton.
(2)
The entering into an agreement with the Township assuring the completion
of the project by the developer and the acceptance of the same by
the Township.
(3)
The securing of a sewage permit from the Commonwealth of Pennsylvania
Department of Environmental Protection.
B.
The word "Township" as used in this article shall mean the Township
of Hampton, or its authorized agent in the person of the Township
Manager or any employee designated as the Inspector.
C.
The word "contractor" as used in this article shall mean the developer,
the developer's contractor or the authorized agent of either;
particularly the person in charge of the particular project.
D.
The contractor, before he starts work, shall meet with the Township
Manager or Township Inspector and inform them as to who is to be responsible
for the project. He is to notify the Township 24 hours in advance
of starting any work.
[Amended 4-26-1995 by Ord. No. 505]
A.
Pipe.
(1)
Clay sewer pipe.
(a)
Standard-strength clay sewer pipe shall be in accordance with
ASTM specifications for "Standard Strength Clay Sewer Pipe," Designation
C13-64T, latest edition.
(b)
Extra-strength clay sewer pipe shall be in accordance with ASTM
specifications for "Extra-Strength Clay Sewer Pipe," Designation C200-64T,
latest edition. In no case will pipe over 12 feet in depth be less
than extra-strength pipe.
(c)
All joints on clay sewer pipe shall be Type III compression-type
joints in accordance with the ASTM specifications, Designation C-425-64,
latest edition.
(2)
Concrete sewer pipe.
(a)
Plain concrete sewer pipe shall be in accordance with the ASTM
standard specifications for "Concrete Sewer Pipe," Designation C-14,
latest edition.
(b)
Reinforced concrete sewer pipe shall be in accordance with the
ASTM standard specifications for "Reinforced Concrete Sewer Pipe,"
Designation C76-57T, latest edition.
(c)
All joints on concrete sewer pipe shall be Type C-P Tylox®
or Press-Seal or approved equal.
(3)
Cast-iron pipe.
(a)
Cast-iron pipe shall be bell and spigot ends, mechanical joint
ends and plain ends, ASTM Designation 21.6, Class 22.
(b)
Mechanical joint for cast-iron pressure pipe and fittings shall
be in accordance with ASA specifications, Designation A 21.11.
(c)
Pipe shall be coated inside and outside with coal tar coating
conforming to ASA Specifications A 21.5.
(d)
All mechanical joints shall be furnished complete with standard
accessories, including cast-iron follower rings; high-strength, cast-iron
bolts and nuts; and plain rubber gaskets.
(e)
Compression-type joints such as Tyton® or approved equal
may be used.
(4)
Steel pipe.
(a)
Steel pipe can only be used for casing purposes where it is
proposed to jack or bore such pipe as permitted by the Township. The
casing pipe shall have wall thickness as follows:
|
Wall Thickness
(inches)
|
Diameter of Pipe
(inches)
| |
|---|---|---|
|
1/4
|
0 to 18
| |
|
5/8
|
18 to 24
| |
|
1/2
|
24 to 30
|
(b)
The casing shall be black steel material and all joints shall
be welded. The pipe shall have a yield strength of 35,000 psi. The
lines placed in the casing shall have the type of joint as previously
specified.
(5)
Asbestos cement pipe. Asbestos cement pipe shall be in accordance
with ASTM C428-63T. Class 1500 can be used up to 12 feet in depth.
Class 2400 shall be used over 12 feet in depth.
(6)
PVC and ABS pipe. Plastic drain, waste and vent pipe may be either
acrylonitrile-butadiene-styrene (ABS) meeting ASTM Standard D661-73
and Standard NSF14-1965, or polyvinyl chloride (PVC) plastic drain,
waste and vent pipe fittings meeting standards ASTM D2665-73 and Standard
NSF14-1965. Both ABS and PVC plastic sewer pipe shall be a minimum
Schedule 40 pipe.
B.
Manholes.
(1)
Precast concrete manholes shall conform to the following specifications:
(a)
Concrete sections. Risers and tops shall conform to ASTM C478-61T.
Riser sections shall have a minimum width of five inches. Top sections
shall have sufficient width to properly support the manhole frame.
(b)
Steps. The manhole steps shall be of aluminum and shall be spaced
not less than 12 inches on centers. They shall be 12 inches in width
and project not less than five inches from the wall.
(c)
Frames and covers. Same as for brick manholes.
(d)
Cone sections. Cone sections shall be designed to resist the
effect of highway loadings. Top sections shall be of eccentric cone
design. The top cone section shall be two feet 4 1/2 inches in
diameter.
(e)
Barrel sections. Inside diameter shall be not less than 48 inches.
(f)
Pipe openings. Pipe openings should be cut during fabrication;
however, may be cut in the field if care is taken in that the opening
is not made too large. Such field cutting should be done with a light
hammer and cold chisel and not with a sledge hammer.
(2)
Brick manholes. Shall conform to the following specifications:
(a)
Brick. All brick shall conform to the ASTM standard specifications
for "sewer brick," latest edition. Grade M.A. brick wall thickness
shall be eight inches up to 12 feet in depth and 12 inches over 12
feet.
(b)
Cement. The cement shall comply with the "Standard Specifications
for Portland Cement" as set forth by ASTM Designation C-150, of the
"Tentative Specifications for Air-Entraining Portland Cement" as set
forth by ASTM Designation C-175.
(c)
Mortar sand. The sand for mortar shall conform to the ASTM standard
specifications.
(d)
Water. The water to be used in the mortar shall be clear and
free from oil, acid, and injurious amounts of vegetable matter, alkalies
or other salts.
(e)
Barrel sections. Inside diameter shall be not less than 48 inches.
The top section shall be two feet 4 1/2 inches in diameter. The
top section of the manhole shall be constructed eccentrically so as
to allow vertical access to the manhole base.
(f)
Steps. The manhole steps shall be of aluminum and shall be spaced
not less than 12 inches on the centers. They shall be 12 inches in
width and project not less than five inches from the wall.
(g)
Frame and covers shall be, or equal to, Pattern Nos. 109 and
110 of the Allegheny Foundry Company. Only one hole shall be placed
in the center of the cover. The letters SEWER shall be placed on the
cover. The castings shall be machined for tight fitting.
C.
Concrete.
(1)
Cement shall comply with the "Standard Specifications for Portland
Cement" as set forth by ASTM Designation C-150 or the "Tentative Specifications
for Air-Entraining Portland Cement," as set forth by ASTM Designation
C-175.
(2)
Aggregates shall comply with the "Standard Specifications for Concrete
Aggregates" as set forth by ASTM Designation C-33. Coarse aggregate
may be crushed limestone, gravel or air-cooled blast furnace slag.
(3)
Water. Shall be clear and free from oil, acid and injurious amounts
of vegetable matter, alkalies or other salts.
(4)
Mixture and strength of concrete. The concrete for the bases of manholes,
for pipe encasements, and other concrete work relative to the laying
of sewers, shall have a compressive strength of 3,000 psi at 28 days.
(In order to obtain this strength, no more than 6 1/2 gallons
of water shall be used per ninety-four-pound sack of cement.) The
proportions of cement and water to aggregate shall conform to Pennsylvania
Department of Transportation Specifications for Class B Concrete as
set forth in Form 408, as amended.
(5)
Handling of ready-mix concrete. The concrete shall be delivered to
the site of the work, and discharge shall be completed within one
hour after introduction of the mixing water to the cement and aggregates.
Delivery of concrete shall be so regulated that placing is a continuous
rate unless delayed by placing operation, but under no conditions
shall the previously placed concrete be allowed to harden or stand
longer than 30 minutes. If either of the above restrictions are violated,
the material already placed must be formed off with keyways and dowel
reinforcing rods so that the remainder of the concrete to be placed
with be tied to the first portion placed.
(6)
Delivery tickets. Shall be filed with the Inspector on the site for
each load of ready-mixed concrete with all data marked thereon.
D.
Bedding and backfill material.
(1)
Sand. All sand used for either bedding or backfilling shall be a
natural bank sand, graded from fine to coarse, not lumpy, and free
from slag, cinders, ashes, rubbish or other material which is objectionable.
It shall not contain a total of more than 10% by weight of loam and
clay, and all material must be capable of passing a three-quarter-inch
screen. Not more than 5% shall remain on a Number 4 sieve.
(2)
Gravel. All gravel or stone used for bedding or backfilling shall
consist of natural bank gravel or limestone quarry stone, having durable
particles graded from fine to coarse in a reasonably uniform combination
with no particles larger than two inches in size. It shall be free
from all slag, cinders, ashes, refuse or other objectionable materials.
(3)
Screenings. All screenings shall consist of limestone or dolomite
ledge rock and shall be free of shale, dust, clay and other objectionable
materials. All material must pass a one-half-inch screen, and no more
than 25% shall pass a Number 100 sieve.
(4)
Granulated slag. All granulated slag shall be a water-cooled blast
furnace product, free from bricks, skulls and other foreign materials.
The slag shall not be lumpy or contain particles larger than 1/2 inch.
E.
Pavement material.
(1)
Hot plant mix shall mean ID-2 binder course or wearing course of
asphaltic concrete and shall comply with the Pennsylvania Department
of Transportation Specifications as set forth in Form 408, as amended.
(2)
Cold patch shall comply with Pennsylvania Department of Transportation
Specifications as set forth in Form 408, as amended.
(3)
Sealcoat shall comply with Pennsylvania Department of Transportation
Specifications for Bituminous Surface CP-2 as set forth in Form 408,
as amended.
A.
Preparation of the site.
(1)
The contractor shall provide adequate protection for all existing
structures, facilities, utilities, roadways, plantings, landscaping,
trees and other existing growth. Great care shall be exercised to
do the least amount of damage as possible. No trees shall be cut unless
it is absolutely necessary. Trees and growth that are cleared shall
be burned or hauled away as soon as possible in accordance with the
Allegheny County Smoke Control and burning laws, which entails obtaining
a fire permit from the county if burning is to be done.
(2)
Even though the sewer is to be placed in a public right-of-way, which
is adjacent to, or in front of, a private property, the contractor
shall notify the owner of said property as to his intentions and methods
of construction and restoration.
(3)
When crossing or placing a sewer in the paved portion of either public
or private roads, the amount of pavement to be removed shall not exceed
the normal width of the trench by more than six inches on each side
of the trench. The contractor shall use such methods as either drilling
or chipping before excavation, which will assure the breaking of the
pavement along straight lines. The face of the remaining pavement
shall be vertical to assure proper restoration of the pavement.
B.
Lines and depths of excavation.
(1)
The excavation shall be done by equipment adequate enough to do the
work, but not oversized causing extreme damage to the surrounding
area. The width and depth of the excavation shall be such as to provide
sufficient area to install the pipe and manholes and shall be to the
lines and grades indicated on the approved plans. The width of trenches
at the springing line of the pipe shall have a minimum clearance of
six inches between the outside of the pipe and the side of the trench.
The bottom of the trench shall be prepared with bell holes of sufficient
size at proper intervals so that the trench load on the sewer is supported
by the barrel of the pipe and not the bell. In all cases, the bottom
quadrant of the pipe shall be fully and uniformly supported.
(2)
Unauthorized excavation below the depth required shall be filled
with sand, granulated slag, gravel or concrete.
(3)
When wet or water conditions are encountered, an underdrain beneath
the pipe is mandatory. The underdrain material shall be Type 2-B stone,
slag, or gravel, and shall be at least six inches deep the full width
of the trench.
(4)
When rock or rocky conditions are encountered, a supplementary foundation
shall be provided for uniform support of the pipe. This foundation
shall consist of granular material such as sand or granulated slag.
"Rocky conditions" shall be defined as shale or stones of a size that
prevent the placing of the pipe with uniform support.
(5)
When either of the above special beddings are used, the trench shall
be excavated six inches below the required depth as shown on the approved
plans.
(6)
The trench shall at all times be excavated to the required width
and depth for a distance of at least 10 feet in advance of the end
of the pipe in place, except when rock is encountered; then the trench
shall be opened 30 feet in advance. No trench shall be opened more
than 100 feet in advance.
(7)
When work is being done in roadways the excavated materials along
with the construction material and the method of construction shall
be so handled to maintain one-way traffic at all times.
C.
Shoring.
(1)
Shoring for the purpose of safety shall follow strictly the "Regulations
for Excavation and Construction" of the Department of Labor and Industry
of the Commonwealth of Pennsylvania, as amended.
(2)
It is specifically required that notice by the contractor be given
to the Department of Labor and Industry on the prescribed form before
any excavation is begun. Copies of these notices shall be sent to
the Township.
D.
Extreme water conditions. When there are extreme water conditions
in the excavation, the contractor shall pump, bail or use other means
to dewater the trench, making it suitable to place the underdrain
and lay the pipe. The contractor may be required to lay a terra cotta,
open jointed, stone-imbedded drain below the sewer to provide subsoil
drainage. All groundwater shall be diverted from entering the excavation.
E.
Blasting. Blasting may be permitted; permission to blast must be
obtained from the Township after submitting to the Township a certificate
of insurance showing that the contractor has liability insurance in
a sufficient amount for the particular project. No blasting will be
allowed within five feet of existing gas or water lines; within 25
feet of existing structures; within 25 feet of recently laid sewer
pipe; and during the first 48 hours after concrete has been placed
within the area of the site. When blasting is permitted, each shot
shall be covered with suitable timber mats to prevent particles from
being thrown, and all rules and regulations for the use of dynamite
as set forth by the U.S. Bureau of Mines, the state and local government
shall be adhered to. Caps or other detonators along with dynamite
shall be stored so that the utmost safety is accomplished.
A.
Pipe placement.
(1)
All pipe shall be laid to a uniform line and grade, socket ends upgrade,
with a firm and even bearing along the barrel of the pipe, close joints,
and smooth invert. Care shall be used to make certain each joint is
completely and properly jointed to the previously laid pipe. The interior
of each pipe shall be cleaned of all excess joint and foreign material
before the next pipe is laid.
(2)
No pipe shall be laid in water or when trench conditions or weather
is unsuitable for such work.
(3)
Wyes, tees or other connections shall be fitted with watertight stoppers
and located under the direction of the Township. At the close of each
day's work, or at such other times when pipe is not being laid,
the open end of the pipe shall be protected with a close-fitting plug
so as not to allow dirt to enter the line. Each morning the line should
be checked to insure cleanliness before continuing to lay pipe.
(4)
When laying pipe, the contractor shall use three batter boards at
twenty-five-foot intervals at all times. Grade stakes shall be spaced
at twenty-five foot and so located that the grades can readily be
transferred to the batter boards. Complete cut sheets shall be submitted
to the Township prior to the start of construction.
B.
Handling of pipe. The contractor shall exercise great care in handling
the pipe and accessories so that no damage is encountered. Any pipe
found to be damaged shall be marked as such and removed from the immediate
work area.
C.
Pipe size. The size of pipe to be used shall be in accordance with
the plans approved by the Township.
D.
Laterals.
(1)
All laterals for proposed dwellings shall be extended to property
lines. They shall be plugged with watertight plugs and marked to the
surface of the ground with a wood marker. Such wood markers shall
extend two feet above proposed grade level and marked "Lateral End."
The end of any lateral or wye shall be no deeper than six feet unless
permission is given by the Township for a depth greater.
(2)
All laterals from sewer main to house sewer shall be a six-inch premium
joint pipe.
E.
Changes in approved plans. When field conditions are such that the
contractor feels it is necessary to change the line or grade on a
sewer line, he should anticipate such a change as early as possible
and submit a request for the change to the Township. The Township
in some cases may require plans of the changes. No deviation from
the approved plans shall be made without the Township approval.
F.
Placing of manholes. After the base of a manhole is poured, no manhole
sections or brickwork will be placed for at least 72 hours. All brick
manholes shall be completely cement-plastered on the outside with
Thoroseal® or equivalent as follows:
(1)
Two feet up on the bottom on the inside and outside, being sure to
cover the areas adjacent to where the pipes entered the manholes.
(2)
Inside and outside of each joint.
(3)
Inside and outside at the joint of the casting. All manholes located
in existing landscaped areas shall be set to grade. All manholes in
unlandscaped areas shall be set one foot above final grade. Manholes
located in paved areas shall be set 1/2 inch to one inch higher than
the paved surface.
A.
General.
(1)
The backfill operation shall not start until the sewers and other
work have been inspected and approved as satisfactory by the Township
Inspector. If the work is found not to be satisfactory with respect
to workmanship and material, the contractor shall immediately remedy
the unsatisfactory condition. The trench and excavation shall be backfilled
as soon as possible after the approval of the work has been given.
(2)
The material used for backfilling the pipe shall be clean earth,
sand or granulated slag free from cinders, ashes, refuse, vegetable
and organic material, boulders, rocks, stone or other material which,
in the opinion of the Township, is unsuitable. Backfill material shall
not be frozen when placed in the excavation.
B.
Method of backfilling.
(1)
The backfill material shall be thoroughly compacted as it is placed,
taking care to prevent displacement or injury to the sewer pipe. In
backfilling immediately around the pipe, the space between the pipe
and the bottom and sides of the trench shall be filled by hand in
four-inch layers, keeping each side of the pipe at the same level
and thoroughly tamping each layer with an approved tamper. Caution
should be used in tamping with a mechanical tamper so the pipe is
not touched, preventing damage to the pipe. The backfill shall then
be placed from the top of the pipe to a depth of two feet above the
pipe in six-inch layers, thoroughly tamping and compacting each layer.
The remainder of the trench shall be backfilled in layers, the depth
of which may vary with the type of equipment used for compaction.
Under no circumstances shall these layers be greater in thickness
than 18 inches.
(2)
Backfilling within two feet of manholes and other structures shall
be accomplished in the same manner as that used around the sides in
layers not exceeding six inches in depth, and solidly tamped in such
a manner as to avoid damaging the structures or producing unequal
pressures upon them.
(3)
When sheeting or shoring is removed, all cavities remaining in or
adjoining the trench shall be solidly filled, and when the sheeting
or shoring is to be left in place, all cavities behind the same shall
be solidly filled.
(4)
When backfilling under existing or proposed roads, whether public
or private, or under existing or proposed structures of any nature,
the trench shall be completely filled with sand or granulated slag.
(5)
The backfill material within two feet of iron pipe shall be clay,
sand, gravel or other approved material that will not be injurious
to the pipe. Slag, cinders, rubbish or other such material shall not
be used in this instance.
(6)
There shall be no working or walking on any completed sewer until
the trench has been backfilled at least two feet over the top of the
pipe, except, of course, as required for backfilling and tamping.
(7)
All backfilled trenches, except those in roadways, shall be left
sufficiently high to allow for settlement to grade after consolidation.
(8)
No backfilling shall be done when either the backfill material or
the trench is frozen.
(9)
The contractor is responsible for maintaining backfilled trenches
that are located in existing roadways, whether they are public or
private, until the permanent paving is placed. The permanent paving
shall not be placed until permission is given by the Township Inspector.
B.
Infiltration.
(1)
A rate of infiltration of groundwater into the sewer, including appurtenances
of the sewer, in excess of 500 gallons per inch diameter per mile
per day will be considered as evidence of inferior work or defective
materials and will require repair or replacement by the contractor.
Any known points of infiltration shall be repaired in spite of the
infiltration rate. An exfiltration test shall be required if deemed
necessary by the Township Inspector or Engineer, which test may be
made on any selected portion of sewer from manhole to manhole, which
length would not exceed 400 feet. This test would be in accordance
with the following and water lost by reason of leakage would be considered
to represent an equal amount of infiltration:
(a)
The effluent sewer at the lower manhole would be plugged and
the influent sewer at the upper manhole would be plugged. The sewer
and manhole would then be filled with water to a point such that there
would be four feet of water over the crown of the pipe at the upper
end. A record of the amount of water added necessary to maintain this
water level for a twelve-hour period shall be used to compute the
rate of infiltration.
(2)
In addition to all other tests, smoke testing by the contractor will
be required.
A.
Landscaped area. All areas where existing lawns, shrubs or plantings
have been disturbed shall be restored to its original condition, reseeding
lawns with the type of grass which was removed; replacing shrubs with
similar shrubs; plantings with similar plantings. Topsoil must be
replaced to a depth of four inches and fertilizer added as deemed
necessary by the Township.
B.
Open and wooded areas.
(1)
Areas which are near proposed roadways, or proposed dwellings or
will be seen from the same, shall be restored by planting perennial
rye grass uniformly spread at a rate of four pounds per 1,000 square
feet and then covered with straw or mulch to protect against the seed
washing away.
(2)
Areas which are in woods or ravines shall be seeded at a uniform
rate of four pounds per 1,000 square feet. No covering is necessary.
(3)
Sloped embankments in wooded areas and ravines that are steeper than
one foot horizontal to 1 1/2 feet vertical shall be planted with
crown vetch, or similar vegetation that has the same hardiness.
A.
Notice of inspection. When the contractor requires an inspection,
he shall notify the Township office 24 hours in advance. (Usually
the contractor will be able to set up a schedule of inspections for
the entire job.) Under no circumstances shall the contractor backfill
or cover any sewer line or structure or any other work without the
approval of the Township Inspector.
B.
Required inspections.
(1)
All sewers laid within the Township limits, whether publicly or privately
owned, shall be inspected by the Township Inspector prior to any backfilling.
(2)
All manhole bases, concrete chambers, pump stations foundations,
concrete encasements and other subsurface structures shall be inspected
prior to backfilling.
(3)
The backfill of the above two items shall be inspected after the
material is in place and compacted to two feet above the pipe.
(4)
All manholes shall be inspected both on the outside and inside prior
to backfilling them.
(5)
The Township shall be notified 24 hours in advance of the commencing
of the exfiltration tests.
(6)
Prior to the Township's acceptance of the project, a final inspection
will be made of the entire job.
C.
Failure to pass inspection.
(1)
When any work is found not acceptable, the contractor will be notified
immediately by the Township. The contractor shall as soon as possible
remedy the condition and notify the Township for another inspection.
The contractor shall continue to work on an unpassable condition until
it is approved by the Township.
(2)
If, for any reason whatsoever, the contractor does not remedy or
give notice that he intends to remedy a condition that is unacceptable,
within 10 days of the notice from the Township of the unacceptability,
the Township shall give written notice of the default to the contractor
giving him 30 days to do the work or state his intention. At the end
of 30 days, if no action has been taken by the contractor, the Township
shall notify the bonding company of the contractor, asking them to
correct the unacceptable work.
[Amended 4-26-1995 by Ord. No. 505]
All work on state highways will be in strict conformance with
the requirements of the Pennsylvania Department of Transportation.
Permit fees, inspection fees, blasting bond cost, etc., will be the
responsibility of the contractor.
