The following work shall be included:
The following reference standards shall apply:
A.
ANSI A21.4/AWWA C104, Cement Mortar Lining for Ductile
Iron and Gray Iron Pipe and Fittings for Water.
B.
ANSI A21.10/AWWA C110, Gray Iron and Ductile Iron Fittings,
three inches through 48 inches, for Water and Other Liquids.
C.
ANSI A21.11/AWWA C111, Rubber Gasket Joints for Ductile
Iron and Gray Iron Pressure Pipe and Fittings.
D.
ANSI A21.51/AWWA C151, Ductile Iron Pipe.
E.
ANSI B.16, Cast Iron Pipe Flanges and Flanged Fittings,
Class 25, 125, 250 and 800.
F.
ASTM D2241, Polyvinyl Chloride (PVC) Plastic Pipe (SDR-PR).
G.
ASTM D2321, Underground Installation of Flexible Thermoplastic
Sewer Pipe.
H.
ASTM A126, Gray Iron Castings for Valves, Flanges and
Pipe Fittings.
I.
ASTM B62, Composition Bronze or Ounce Metal Castings.
J.
AWWA C502, Dry Barrel Fire Hydrants.
K.
AWWA C600, Installation of Cast Iron Water Mains.
L.
AWWA C601, Disinfecting Water Main.
M.
AWWA C150, Thickness Design for Ductile Iron Pipe.
N.
AWWA C504, Rubber Seated Butterfly Valves.
O.
AWWA C500, Gate Valves, 3-inch through 48-inch.
P.
AWWA C509, Resilient-Seated Gate Valves.
Q.
AWWA C900, Polyvinyl Chloride Pressure Pipe, 4-inch through
12-inch for water.
R.
AWWA C550, Protective Interior Coatings for Valves and
Hydrants.
Shop drawings for all products and materials shall be submitted as directed
by the Superintendent.
A.
All pipe and fittings shall be inspected and tested at
the foundry as required by the standard specifications to which the material
is manufactured. The contractor shall furnish in duplicate to the Water Superintendent
and/or his representative sworn certificates of such tests.
B.
In addition, the owner reserves the right to have any
or all pipe, fittings and special casting inspected and/or tested by an independent
service at either the manufacturer's plant or elsewhere. Such inspection and/or
tests shall be at the owner's expense.
C.
Pipes and fittings shall be subjected to a careful inspection
and a hammer test just before being laid or installed.
A.
Ductile iron pipe. Pipe shall be designed in accordance
with AWWA C150 and shall conform to ANSI A21.51/AWWA C151, Class 52, and shall
have push-on joints except that pipe installed in vaults shall have flanged
ends conforming to ANSI B16.1. Pipe shall be double cement lined with seal
coat inside and out, conforming to ANSI A21.4/AWWA C104. Push-on joints and
rubber gaskets shall be in accordance with ANSI A21.11/AWWA C111.
B.
Pipe fittings.
(1)
Fittings shall be cast iron, 250 pounds per square inch
pressure rating, or ductile iron, 350 pounds per square inch pressure rating,
conforming to ANSI A21.10/AWWA C110 with mechanical joints. Compact ductile
iron fittings conforming to ANSI A21.53/AWWA C153 will be acceptable. Joints
and gaskets shall conform to ANSI 21.11/AWWA C111. Joints shall be furnished
with ductile iron follower glands. Fittings shall be double cement lined and
seal coated inside and out in accordance with ANSI A21.4/AWWA C104. Tees for
hydrant branches and for stubs for future use shall have mechanical joints
on the run with a plain end having an integral rotating gland on the branch.
The gland will anchor mechanical joint pipe or valve ends to the plain end
of the tee.
C.
All ductile and cast-iron pipe and fittings shall be
clean, sound and without defects. The castings shall be smooth and free from
pinholes, excess iron, etc. The coatings shall be continuous, smooth and neither
brittle nor sticky.
D.
The pipe manufacturer shall supply the engineer with
certificates of compliance with these specifications and certification that
each piece of ductile iron pipe has been tested at the foundry with the ball
impression test, ring bending or other approved test for ductility.
A.
Resilient seated gate valves.
(1)
Resilient seated gate valves shall be manufactured to
meet or exceed the requirements of AWWA C-509 or latest revision. Valves shall
have an unobstructed waterway when fully opened equal in diameter to at least
1/4 inch greater than the nominal valve size. Valves shall have mechanical
joint end.
(2)
All internal surfaces shall be coated with epoxy to a
minimum thickness of 10 mils. Said coating shall be nontoxic, impart no taste
to water and shall conform to AWWA C-550 or latest revision.
(3)
Valves shall be provided with two O-ring stem seals.
Both O-rings shall be located above the thrust collar. The sealing mechanism
shall provide a dual seal with zero leakage at the water working pressure
when installed with the line flow in either direction and shall consist of
a cast-iron gate having a vulcanized synthetic rubber coating with no rubber
metal seams or edges in the waterway when in the fully closed position.
(4)
All valves shall be seat tested at the rated working
pressure in accordance with Section 6 of AWWA C-509. Valve shall be rated
at 200 psi working pressure and 400 psi test pressure.
(5)
Valves shall be open left. The owner has standardized
on resilient seated gate valve manufactured bye M & H or Mueller Co. The
contractor shall use the same.
B.
Butterfly valves.
(1)
All butterfly valves shall be of the rubber-seated tight-closing
type and shall meet or exceed AWWA Specification C-504-70, with latest revisions.
Valves shall be designed for underground service.
(2)
Valves shall have mechanical joints ends. Standard M.J.
accessories are also to be provided.
(3)
Valve shall be equipped with a two-inch AWWA operating
nut and shall open as specified below.
(4)
All valves shall be rated at 200 per square inch minimum
working pressure and hydrostatically tested at 300 pounds per square inch.
(5)
All valves shall have thermosetting epoxy coating on
the exterior and on the interior and the vane. The coating shall meet all
requirements of AWWA C-550 or latest revision. All bodies and vanes shall
be factory coated prior to assembly and tested. All ferrous surfaces of the
valve body waterway and vane shall receive an epoxy coating with a minimum
dry film thickness of eight mils. All exterior surfaces shall be coated with
asphalt varnish.
(6)
Valves shall open left. The owner has standardized on
Mueller or M&H Butterfly Valves. The contractor shall use the same.
C.
Valve boxes.
(1)
Valve boxes shall be furnished for all valves and shall
be made in the United States, Canada or approved equal. Shop drawings will
be required for approval before delivery.
(2)
Valve boxes shall be standard cast iron, asphalt coated,
adjustable, sliding type, together with cast-iron covers with the word "water"
plainly cast in relief on the top surface.
(3)
The bottom section shall have a minimum internal diameter
of 5 1/4 inches. The top section shall have a minimum diameter of 6 1/8
inches. There shall be a minimum six-inch overlap between sections.
(4)
The bottom section shall be 48 inches in length for all
butterfly valves and 36 inches in length for all gate valves. The top section
shall be at least 26 inches in length and have a plain bottom. No three-piece
combinations shall be acceptable.
(5)
Valve boxes shall be completely and thoroughly coated
with bitumastic paint.
A.
Hydrants shall conform to the requirements of AWWA C-502
and be designed for 150 pounds per square inch working pressure tested to
300 pounds per square inch hydrostatic. Hydrants shall have a six-inch mechanical
joint shoe, five-and-one-fourth-inch valve opening and six-foot bury, open
left with two two-and-one-half-inch hose nozzles and one four-and-one-half-inch
pumper connection, National Standard threads, operating nut and nozzle cap
with non-kink safety chains.
B.
Hydrants shall be the compression type, closing with
the pressure. They shall be traffic model with safety flange and stem couplings.
C.
Hydrants shall be able to be rotated 360°. They shall
have a positive closing and self-cleaning drain valve, and drainage area shall
be completely bronze or brass lined.
D.
The owner has standardized on Mueller Centurion or AVK.
The contractor shall therefore use the same.
E.
Hydrants shall be painted yellow to match Town's standard
color.
A.
Corporation stops shall be brass compression-type with
Mueller thread. Corporations shall be supplied with pack-joint quarter bends
where required. Stops shall be Mueller Co., Mark II Oriseal.
B.
Tubing for services and chlorine injection points shall
be Type K annealed seamless copper designed for buried water service. The
name or trademark of the manufacturer and type shall be stamped at intervals
along the pipe.
C.
Tubing for services and chlorine injection points shall
be polyethylene designed for 160 pounds per square inch service. Pipe shall
be in accordance with AWWA C901 standard for polyethylene pressure pipe, tubing
and fittings.
D.
Adapter couplings may be required for fitting new services
to existing service lines. Such fittings shall be compression connections
and provide electrical continuity.
E.
Couplings shall be comprised of ductile iron and shall
be solid sleeve (long lay length) or Hymax or approved equal.
A.
Pipe and accessories shall be handled and stored in such
a manner as to ensure that pipe is installed in sound, undamaged condition.
Particular care shall be taken not to injure the pipe coating or lining.
B.
Ductile iron pipe and fittings and the cement linings
are comparatively brittle. Every care shall be taken in handling and laying
pipe and fittings to avoid damaging the pipe or lining, scratching or marring
machined surfaces and abrasion of the pipe coating or lining.
C.
Any pipe showing a distinct crack with no evidence of
incipient fracture beyond the limits of the visible crack, if approved, may
have the cracked portion cut off by, and at the expense of, the contractor
before the pipe is laid so that the pipe used is perfectly sound. The cut
shall be made in the sound barrel at a point at least 12 inches from the visible
limits of the crack.
D.
If authorized, cutting of the pipe shall be done so that
the cut is square and clean, without causing damage to the pipe lining. Unless
otherwise authorized by the engineer, all pipe cutting shall be done by means
of an approved type of power cutter. The use of hammer and chisel, or any
other method which results in rough edges, chips and damaged pipe, is prohibited.
All cut edges shall be field beveled by use of a power grinder, as required,
prior to installation.
E.
Each pipe section shall be placed into position in the
trench in such manner and by such means required to cause no damage to the
pipe, person or to property.
F.
The contractor shall furnish slings, straps and/or approved
devices to provide satisfactory support of the pipe when it is lifted. Transportation
from delivery areas to the trench shall be restricted to operations which
can cause no damage to the pipe units.
G.
Pipe shall not be dropped from trucks onto the ground
or into the trench.
H.
The contractor shall have on the job site, with each
laying crew, all the proper tools to handle and cut the pipe.
I.
Damaged pipe coating and/or lining shall be restored
before installation only as approved or directed by the engineer.
B.
The contractor shall use this information to set line
and use a surveyor's level or transit to set grade as required.
C.
The use of string levels, hand levels, carpenter's levels
or other curved devices for transferring grade or setting pipe are not permitted.
D.
During construction, the contractor shall provide the
engineer, at his request, all reasonable and necessary materials, opportunities
and assistance for setting stakes and making measurements, including the furnishing
of one or two rod men or chain men as needed at intermittent times. He shall
not proceed until he has made timely request of the engineer for, and has
received from him, such controls and instructions as may be necessary for
the work to progress. The work shall then be done in strict conformity with
such controls and instructions. The contractor shall carefully preserve benchmarks,
reference points and stakes, and, in case of willful or careless destruction
by his own men, he will be charged with the resulting expense and shall be
responsible for any mistakes or delay that may be caused by their unnecessary
loss or disturbance.
A.
As soon as excavation has been completed to required
depth, bedding material shall be placed and compacted to the elevation necessary
to bring the pipe to grade as specified in Section 02220.
B.
The compacted bed shall be rounded so that at least the
bottom quadrant of the pipe shall rest firmly for the full length of the barrel.
Suitable holes for bells or couplings shall be dug around the pipe joints
to provide ample space for making tight joints.
C.
The trench bottom shall be straight, free of bumps or
hollows and at the proper depth. Any irregularities in the trench bottom shall
be leveled off or filled in with a selected gravel or sand thoroughly tamped.
D.
If determined by the engineer, the trench bottom shall
be prepared by digging at least six inches deeper than pipe grade and backfilling
to proper grade with a selected gravel or sand backfill properly tamped.
E.
All unsuitable material shall be removed from the bottom
of the trench excavation as directed by the engineer to the depths ordered.
The trench shall be backfilled with an approved gravel backfill material,
placed in six-inch layers, to within six inches of proper pipe grade. Each
gravel lift shall be thoroughly tamped. A six-inch layer of selected gravel
or sand shall be placed and tamped for proper pipe support.
A.
Laying of pipe and fittings shall be in accordance with
the requirements of AWWA Standard Specifications for Installation of Cast-Iron
Water Mains, C600, except as otherwise provided herein.
B.
Each pipe length shall be inspected for cracks, defects
in coating or lining and any other evidences of unsuitability. The contractor
shall excavate a minimum amount of trench and shall backfill trench to within
two lengths of pipelaying. All trenches shall be backfilled at night unless
otherwise approved by the Water Superintendent and/or his representative.
C.
Pipe shall be laid in the dry and at no time shall water
in the trench be permitted to flow into the pipe.
D.
The pipe shall then be laid on the trench bedding, and
the pipe pushed home. Jointing shall be in accordance with the manufacturer's
instructions and appropriate ASTM standards, and the contractor shall have
on hand for each pipelaying crew the necessary tools, gauges, pipe cutters,
etc., necessary to install the pipe in a workmanlike manner. Pipelaying shall
proceed upgrade with spigot ends pointing in the direction of flow.
E.
Blocking under the pipe will not be permitted except
where a concrete cradle is proposed, in which case precast concrete blocks
shall be used.
F.
If inspection of the pipe indicates that the pipe has
been properly installed as determined by the Water Superintendent and/or his
representative, the contractor may then refill or backfill the remainder of
the trench in accordance with the specifications.
G.
At any time that work is not in progress, the end of
the pipe shall have a temporary plug to prevent the entry of animals, earth,
water, etc.
H.
Acceptable alignment shall be preserved in laying. The
deflection at joints shall not exceed 3°, or 12 inches for an eighteen-foot
length of pipe. Fittings, in addition to those shown on the drawings,[1] shall be provided, if required, in crossing utilities which may
be encountered upon opening the trench. Solid sleeves shall be used only where
approved by the Water Superintendent and/or his representative.
[1]
Editor's Note: The drawings are located at the end of this chapter.
I.
Concrete thrust blocks shall be installed at all fittings
and other locations as directed by the engineer. Minimum bearing area shall
be as shown on the drawings.[2] Joints must be protected by felt roofing paper prior to placing
concrete. Concrete shall be placed against undisturbed material and shall
not cover joints, bolts or nuts or interfere with the removal of any joint.
Wooden side forms shall be provided for thrust blocks.
[2]
Editor's Note: The drawings are located at the end of this chapter.
J.
Push-on joints shall be connected in strict accordance
with the manufacturer's instructions. Pipe shall be laid with bell ends on
the upstream side. A rubber gasket shall be inserted in the groove of the
bell end of the pipe and joint surfaces cleaned and lubricated. The plain
end of the pipe to be entered shall then be inserted in alignment with the
bell of the pipe to which it is to be jointed and pushed home with a jack
or by other means. After jointing the pipe, a metal feeler shall be used to
make certain that the rubber gasket is located correctly.
K.
Mechanical joints at valves, fittings and where designated
shall be in accordance with the Notes on Method of Installation under ANSI
Specification A21.11 and the instruction of the manufacturer. To assemble
the joints in the field, the contractor shall thoroughly clean the joint surfaces
and rubber gasket with soapy water before tightening the bolts. Bolts shall
be tight to the specified torques. Under no conditions shall extension wrenches
or pipe over handle or ordinary ratchet wrench be used to secure greater leverage.
L.
Field-Lok gaskets shall be installed after any
mechanical fitting where there is a change in the direction of flow or as
determined by the Water Superintendent and/or his representative.
[Added 10-24-2006]
A.
Valves and boxes shall be set with the stem vertical
and box vertically centered over operating nut. Valves shall be set on a firm
foundation and supported by tamping selected excavated material under and
at the sides of the valve. The gate box shall be supported during backfilling
and maintained in vertical alignment with the top flush with finish grade.
B.
Valves shall be anchored to all tees or fittings with
three-fourths-inch threaded rods, wherever possible or as directed by the
Water Superintendent and/or his representative.
C.
Couplings and fittings shall be installed in accordance
with manufacturer's instructions.
Hydrants shall be set at the location shown and bedded on a firm foundation.
A drainage pit three feet in diameter and two feet deep below and to the rear
of the hydrant shall be filled with crushed stone and satisfactorily compacted.
During backfilling, additional pea stone shall be brought up around and six
inches over the drain port. Where directed by the engineer, the contractor
shall install plugs in the hydrant drain ports. No hydrant shall be backfilled
until contractor is directed to do so by the Water Superintendent and/or his
representative. Each hydrant shall be set in true vertical alignment and properly
braced. Concrete thrust blocks shall be placed between the back of the hydrant
inlet and undisturbed soil at the end of the trench. All hydrants shall be
rodded to the gate valves using three-fourth-inch threaded rod and duclugs.
Minimum bearing area shall be as shown on the drawings.[1] Roofing felt shall be placed around hydrant elbow before placing
concrete. Care shall be taken to ensure that concrete does not plug the drain
ports.
[1]
Editor's Note: The drawings are located at the end of this chapter.
A.
The tapping machine shall be rigidly fastened to the
pipe halfway between the horizontal and vertical position. The length of travel
of the tap should be so established that when the stop is inserted and tightened
with a fourteen-inch wrench, not more than one to three threads will be exposed
on the outside. When a wet tapping machine is used, the corporation stop shall
be inserted with the machine while it is still in place. Stops shall be tightened
only sufficiently to give water tightness, and care must be constantly exercised
not to overtighten them.
C.
Care shall be exercised in the placing and laying of
tubing to be sure that the pipe does not have kinks or sharp stones or ledge
which would cause damage to the pipe. At least six inches of sand shall be
placed as shown on the drawings, adjacent to, above and below the tubing.
No stone shall be dropped on the tubing until the depth of backfill above
the tubing is in excess of one foot.
D.
Connections shall be made of new services with existing
services unless otherwise directed by the engineer. Bushings and/or couplings
shall be used as required to connect new tubing with existing services.
A.
Each gate box shall be installed vertically, centered
over the operating key, with the elevation of the top adjusted to conform
to the finished surface at the completion of the contract. The box shall be
adequately supported during backfilling to maintain vertical alignment.
B.
Installation of chlorination taps shall be in accordance with § 407-53, Installation of corporation and services. Service saddles must be used.
C.
The exact location of the manual air releases will be
determined in the field.
A.
The contractor shall furnish all labor, pumps, taps,
chemicals and other necessary equipment to conduct hydrostatic pressure tests
and measured leakage test and to disinfect thoroughly the mains laid under
this contract in accordance with Section 4, AWWA C600-82, Installation of
Ductile Iron Water Main.
B.
The tests and disinfection shall be conducted at a time
specified by and under the supervision and direction of the engineer who shall
judge the success or failure of the work to meet the required standards.
C.
In the event that the work fails to meet the required
standards as stated herein, the contractor shall perform such excavation,
repair, relaying of pipe, rechlorinating and all other work necessary to correct
the work and shall repeat the tests or chlorination as often as may be necessary
and until such time as the required standards are met.
A.
Before applying the specified test pressure, all air
shall be expelled from the pipe. If suitable means of expelling air are not
available at high places, the contractor shall make all the necessary taps
as shown on plans or as the engineer may direct. After the tests have been
completed, the corporation stops shall be left in place or removed and plugs
inserted, as directed by the Water Superintendent and/or his representative
or owner.
B.
The newly laid pipe shall be tested in valved or plugged
sections as determined by the Water Superintendent and/or his representative
in the field. Water shall be slowly introduced into the section being tested
by means of an approved power-driven high-pressure test pump.
C.
The new laid pipeline shall be tested to a pressure equal
to 150% of the maximum static pressure for the section being tested, measured
at the lowest point of the section being tested corrected to the elevation
of the test gauge. If the static pressure of any newly laid section of pipeline
being tested is less than 100 pounds per square inch gauge measured at the
lowest point of the pipeline section, then the minimum test pressure shall
be 150 pounds per square inch gauge.
D.
The pressure shall be raised to the test pressure required
for each section being tested as determined by the engineer. When the test
pressure is reached, the time shall be recorded and the test shall begin.
The duration of each pressure test shall be a minimum of two hours. During
the test, pressure shall be maintained in the section of pipeline being tested
by means of a recirculating bypass-type test pump. Water shall be added in
measured amounts from a container of known volume if required to maintain
pressure. The addition of excessive amounts of water shall constitute immediate
test failure. The Water Superintendent and/or his representative will approve
all gauges and test equipment. In general all gauges shall be in two-pound
increments.
E.
During the test, the line will be examined by the engineer
for visible leaks and breaks. Any defects in the works shall be repaired,
and any defective materials shall be removed and replaced by the contractor
as and where directed by the Water Superintendent and/or his representative.
A.
Method of testing. The leakage test shall be conducted
concurrently with the pressure test. "Leakage" shall be defined as the quantity
of water that must be supplied into the newly laid pipe, or any valved section
thereof, to maintain pressure within five pounds per square inch of the specified
test pressure after the air in the pipeline has been expelled and the pipe
has been filled with water. Leakage shall not be measured by a drop in pressure
in a test section over a period of time.
B.
No pipe installation will be accepted if the leakage
is greater than that determined by the following formula, in which L is the
allowable leakage, in gallons per hour; S is the length of pipe tested, in
feet; D is the nominal diameter of the pipe, in inches; and P is the average
test pressure during the leakage test, in pounds per square inch gauge.
[Amended 10-24-2006]
|
L
|
=
|
SDP
| |
|
2
|
133,200
|
D.
When testing against closed metal-seated valves, an additional
leakage per closed valve of 0.0078 gallon per hour per inch of nominal valve
size shall be allowed.
E.
When hydrants are in the test section, the test shall
be made against the closed hydrant.
F.
Acceptance shall be determined on the basis of allowable
leakage. If any test of pipe laid discloses leakage greater than that specified,
the contractor shall, at his own expense, locate and make repairs as necessary
until the leakage is within the specified allowance.
G.
All visible leaks are to be repaired regardless of the
amount of leakage. At the end of the test period, if the amount of water added
to the main from the calibrated vessel is less than the allowable leakage,
and if the line shows no visible leaks or other failures, that portion of
the main tested will be approved by the engineer.
A.
All valves and hydrants shall be pressure tested during
the main pipeline test. Hydrant gate valves shall remain open during the main
pressure test. After the pipeline has been pressure tested and accepted, the
hydrant gate valve shall be closed and the hydrant valve cracked open to release
some pressure on the hydrant side of the gate valve. An acceptable test for
each hydrant gate valve shall be no loss of pressure in the main line test
pressure as each valve is closed.
B.
All main line butterfly or gate valves and control valves
on any intersecting side streets shall also be tested by the same procedures
outlined above as far as practical. The Water Superintendent and/or his representative
shall decide if it is impractical to test any one particular valve location.
No pressure test shall be considered acceptable until all possible control
valves have been tested to ensure proper closing and watertightness.
C.
The contractor shall make any taps and furnish all necessary
caps, plus, etc., as required in conjunction with testing. He shall also furnish
a test pump, gauges and any other equipment required in conjunction with carrying
on the hydrostatic tests. He shall at all times protect the new water mains
and the existing water mains against the entrance of polluting material.
A.
After satisfactory pressure and leakage tests have been
made, before placing the newly laid mains in service, and when directed by
the Water Superintendent and/or his representative, the contractor shall disinfect
by chlorination.
B.
Prior to chlorination, the mains shall be flushed to
remove dirt and other foreign substances.
C.
The mains shall be disinfected by the contractor under
the supervision of the Water Superintendent and/or his representative. The
contractor shall use a manually controlled, vacuum-type solution feed chlorinator
using a mixture of water and an approved chlorine-bearing compound of known
chlorine content, such as calcium hypochlorite. The chlorine shall be introduced
into the main through a three-fourths-inch corporation stop installed approximately
one foot upstream from the valve at the beginning of the job and shall be
tested for residual chlorine at a three-fourths-inch corporation stop installed
approximately one foot from the downstream valve at the end of the project.
D.
Water from an approved source shall be introduced slowly
into the main during the application of chlorine. The rate of chlorine mixture
flow shall be in such proportion to the rate of water entering the pipe that
the chlorine dose entering the mains shall be at least 50 parts per million.
When the pipe line has been completely filled with treated water, the main
shall be sealed off. Treated water shall be retained in the main for a period
of at least 24 hours. At the end of the retention period, the chlorine residual
at the extremities of the pipe and at other representative points shall be
at least five parts per million.
E.
Should the first treatment fail to meet the above requirements,
the procedure shall be repeated until tests show that, in the opinion of the
Water Superintendent and/or his representative, effective disinfection has
been accomplished.
F.
Following acceptance of the disinfection process, the
chlorinated water shall be flushed from the newly laid main until such time
as the replacement water throughout its entire length shall be equal in quality
to that elsewhere in the system.
G.
A representative water sample and/or multiple samples
shall be collected of potable water now present in the new pipeline after
flushing the chlorine from the new water main and then again within 24 hours
of the initial collection and testing by the contractor under the supervision
of the Water Superintendent and/or his representative. This sample shall be
taken to a Massachusetts Department of Environmental Protection DEP-certified
laboratory for a bacteria analysis. The cost associated with the collection
and analysis of the sample shall be paid for by the contractor.
[Amended 10-24-2006]
H.
Special disinfection procedures, such as soaking or swabbing,
approved by the Water Superintendent and/or his representative shall be used
in connections to existing mains and where the method outlined above is not
practicable.
A.
The contractor shall furnish all necessary labor, tools,
joint materials, equipment, etc., to connect new water pipes to existing water
pipes with the required proper fittings. Flexible transition couplings used
to connect new water pipes to existing water pipes shall be as specified.
B.
All connections shall be made at such time and in such
a manner as to cause as little interruption in water service as possible.
C.
Coordination of all such work shall be made with the
engineer and owner, who shall be present when the work is done and shall operate
all valves. The contractor shall notify the Water Superintendent and/or his
representative 72 hours in advance of when he plans to connect into the existing
water mains.
D.
All materials, equipment and labor necessary for the
connection of the new water mains to the existing water mains shall be accomplished
as shown on the plans or as directed by the engineer and shall be considered
subsidiary to the pipelaying items.
A.
The contractor shall exercise caution to properly protect
the existing sewer services and drain pipes from construction damage. It shall
be the contractor's responsibility to demonstrate that all existing active
sewer services and drains are functioning properly after the installation
of the proposed water main to the satisfaction of the Water Superintendent
and/or his representative.
B.
Damage to existing drains and sewer services shall be
repaired and/or replaced with materials of the same size as the existing service.
Existing slopes and inverts shall be maintained. Pipe joints shall be made
using suitable flexible couplings, approved by the Water Superintendent and/or
his representative. Fernco couplings are an acceptable coupling for sewer
service repair. The contractor shall use the same. Concrete mortar joints
will not be accepted.
C.
If damage occurs to existing house or business sewer
services or storm drains and acceptable repairs are accomplished as outlined
above, the contractor shall be required to adequately demonstrate to the Water
Superintendent and/or his representative that the repaired service is functioning
normally before any backfill material shall be allowed to be placed.
