If a builder, developer or contractor desires to extend or install mains,
it shall be at his own cost and expense and such extension or installation
shall be accomplished in accordance with the provisions hereof and to the
approval of the Town of Goshen. Plans for such extension shall first be approved
by the New York State Board of Health, and all such work shall conform to
specifications approved by the New York State Board of Health and Orange County
Health Department and approved by the Town and be subject to Town inspection.
Title to all such extensions, including service connections between the main
and the curb box, shall be vested in the Town, and upon the acceptance of
any such work by the Town, the Town shall maintain and replace the same when
necessary as in the case of Town-installed work.
All mains shall be Class 150 cast iron (thickness Class 22) cement-mortar
lined or asbestos cement pipe Class 2400 pounds, maximum length for six-inch
pipe not to exceed 10 feet zero inches (AWWA approved), a minimum of six inches
in diameter and shall be adequate for fire protection purposes. Dead-end mains
over 600 feet long shall be a minimum of eight-inch-diameter pipe and shall
be provided with a hydrant or blowout at the end. Pipe may be push-on joint
or mechanical joint. Two bronze wedges shall be used with push-on joints.
Pipes shall have five feet of cover.
Cast-iron fittings shall be standard-sized, mechanical joint, short
body cast-iron fittings for 250 pounds per square inch water pressure plus
water hammer in full accordance with American Standard Specification A21.10 — 1952
for short body fittings and A21.11 — 1964 for mechanical joints,
the latest specification to be used for push-on-type fittings. The fittings
shall be cement-mortar lined and seal-coated in accordance with American Standard
Specification A21.4 — 1964. Mechanical joint fittings shall
come with lead-tipped gaskets.
A.
Valves shall be installed at every street intersection
and at every place where a main is tapped. Valves shall also be installed
along each street so that there is a valve within 1,000 to 1,200 feet of the
next valve.
B.
All valves shall be mechanical joint, double-gate valves
with O-ring packing designed for a waterworking pressure of 150 pounds per
square inch and shall be in full conformance with the latest AWWA Specification
C-500 for Gate Valves for Ordinary Water Works Service. All valves shall open
by turning to the left or counterclockwise and have a square operating nut.
They shall be the same as or equal to those manufactured by the Mueller Co.,
or approved equal, with lead-tipped gaskets.
C.
Valve boxes shall be a two-piece, cast-iron, standard
screw type, with cast-iron cover of proper length for actual trench depth.
Valve box covers shall fit flush with the outside casting rim, shall not rattle
or rock and shall be capable of removal with a bar or pick. Each cover face
shall be lettered "Water" and have an arrow indicating the direction of opening.
A.
Hydrants shall be installed at such spacing that each
house within the area shall be located within 600 feet of a hydrant. A hydrant
or blowout shall be installed at the end of every dead-end water main. In
all instances hydrant spacings shall meet the requirements of the New York
rating organizations.
B.
Fire hydrants shall be in accordance with the latest
AWWA Specification C-502, Fire Hydrants for Ordinary Water Works Service.
Each hydrant shall be equipped with two nozzles and one pumper connection
if requested by the Town, of proper size to meet fire protection requirements
of the Town. The nozzle and pumper threads and type of operating nut also
shall meet these standards.
C.
All hydrants shall open by turning to the left or counterclockwise.
D.
All hydrants furnished shall be for a trench depth of
five feet from the ground line to the bottom of the six-inch mechanical joint
bell connection. All hydrants shall have a six-inch mechanical joint connection
and a valve opening of four inches. The hydrants shall be the same as or equal
to those manufactured by Mueller or other well-known manufacturer of hydrants.
The hydrants furnished shall be true breakaway traffic-type hydrants.
A.
House services shall be installed to each existing house
at the time the water main is placed in the street. Locations for all lots'
services to curb box are to be installed in a development before street is
double-surfaced treated, prior to acceptance by the Town. Services shall be
a minimum of 3/4 inch and laid at the depth of five feet.
B.
Corporation stops shall be standard waterworks stops
similar or equal to the Mueller Style H-15000.
C.
The main shall be tapped at an angle of 45° from
the vertical in order that a flexible copper tubing can be laid in a gooseneck
position to take care of pipe movement. All taps shall be installed in accordance
with the pipe manufacturer's directions, allowing three threads of the corporation
tap to be exposed.
D.
Copper service pipe shall be Type K copper tubing annealed
after coiling, conforming to the requirements of the latest ASTM Designation
B-88. All couplings required to join sections of tubing shall be similar or
equal to the Mueller H-15400, three-part union, copper to copper.
E.
Curb stops shall be standard waterworks, inverted key,
round-way, ground key curb stops, similar or equal to Mueller Style H-15200,
with coupling for copper tubing on the inlet and outlet.
F.
Curb boxes shall be extension type for 5 1/2 to
6 1/2 foot cover, arch pattern base with one-inch upper section, and
shall be complete with stationary rod and two-hole cover. The word "Water"
shall be lettered on the cover.
A.
Pipe shall be laid in a workmanlike manner, at a cover
depth of five feet and under Town supervision. Selected backfill shall be
placed by hand and be tamped along the side of the pipe. Fill to 12 inches
above the pipe shall be carefully placed and tamped. Rock shall be excavated
to a depth of six inches below the pipe and the excavation backfilled with
bank-run gravel. A-C pipe shall be laid in sand and in accordance with manufacturer's
specifications.
B.
Reaction or thrust backing shall be applied on all pipelines
at all tees, plugs, caps and at joints deflecting 22 1/2° or more.
Thrust backing shall be of concrete of a mix having a compressive strength
of not less than 2,000 pounds per square inch, and backing shall be placed
between solid ground and the fitting to be anchored. The backing shall be
so placed that the pipe and fitting joints will be accessible for repair.
C.
Testing pipelines.
(1)
All pipelines shall be tested after installation. The
test shall consist of a pressure test and a leakage test. Under the pressure
test the hydrostatic pressure shall be equivalent to a pressure of 50% above
normal operating pressure, based on the elevation of the test gauge. Under
the leakage test the hydrostatic pressure shall be set at the maximum operating
pressure for the particular location.
(2)
The pressure test shall be at least one hour in length,
before complete backfilling of the pipeline, when the joints are exposed.
All visible leaks, any cracked or defective pipe, fittings, valves or hydrants
discovered in consequence of the pressure test shall be repaired and the test
shall be repeated until results are satisfactory.
(3)
The leakage test shall be conducted after the pressure
test has been completed satisfactorily. Push-on joints may be tested for leakage
prior to complete backfilling. Leakage is defined as the quantity of water
to be supplied into the newly laid pipe necessary to maintain the specified
leakage test pressure after the pipe has been filled with water and the air
expelled.
(4)
The allowable leakage shall not exceed 25 United States
gallons per 24 hours per mile of pipe per inch nominal diameter for pipe in
eighteen-foot lengths, evaluated on a pressure basis of 150 pounds per square
inch. Should any test of pipe laid disclose leakage greater than that specified,
the contractor shall locate and repair the defective joints.
D.
Disinfection of pressure water pipelines. Disinfection
of water mains shall be equal in substance to the Standards for Disinfecting
Water Mains prepared by the American Water Works Association, C-601-54 (excepting
Item 18.4.1), and include the following:
(1)
Before being placed into general use, all pressure water
piping and pipelines shall be flushed thoroughly, disinfected with chlorine
and flushed again, in accordance with sound engineering practice. The method
of disinfection shall consist of introducing a solution of hypochlorite or
chlorine and water in controlled quantities into the piping system in such
proportion that the chlorine water mixture entering the piping shall contain
at least 50 parts per million of chlorine. Outlets in the piping shall be
opened to ensure complete distribution of the chlorine water mixture throughout
the system to be disinfected. The mixture shall remain in the system long
enough to destroy all non-sphere-forming bacteria, at least 24 hours and preferably
longer, as may be directed.
(2)
The chlorine residual at the end of the required retention
time shall be at least 10 parts per million at pipe extremities. If the residual
is less than 10 parts per million, the disinfection procedure shall be repeated
until a residual of 10 parts per million after retention is obtained at pipe
extremities.
(3)
Upon completion of the disinfection process, the chlorine
water mixture shall be flushed thoroughly from the system and samples for
bacteriological examination shall be taken from the system to assure that
complete disinfection has been accomplished. Arrangements for bacteriological
sampling and examination shall be made by the contractor with a recognized
laboratory, meeting the New York State Department of Health's requirements
for examination of water samples for bacteriological examination. Water samples
shall be taken at the locations selected by the Town Inspector. Results of
laboratory test shall be forwarded to the Town. If results are not satisfactory,
the contractor shall repeat the disinfection procedure. The acceptance and
connection to the Town system of the installation is contingent on the receipt
of satisfactory laboratory testing.
E.
Setting hydrants.
(1)
The hydrants shall be located as shown or as directed
and in a manner to provide complete accessibility, and also in such a manner
that the possibility of damage from vehicles or injury to pedestrians will
be minimized. The plans show the approximate location of hydrants. In general,
hydrants shall be installed on the same side of the street as the main.
(2)
All hydrants shall stand plumb and shall be set to the
established grade, as directed in the field, with nozzles at least 18 inches
above the ground. Whenever a hydrant is set in soil that is pervious, drainage
shall be provided at the base of the hydrant by placing coarse gravel or crushed
stone mixed with coarse sand to a depth of at least six inches above the waste
opening in the hydrant and to a distance of one foot around the elbow. Whenever
a hydrant is set in clay or impervious soil, a drainage pit two feet in diameter
and three feet deep shall be excavated below each hydrant and filled compactly
with crushed stone mixed with coarse sand. The crushed stone shall be placed
under and around the elbow of the hydrant and to a level of six inches above
the waste opening.
(3)
The bowl of each hydrant shall be well braced against
unexcavated earth at the end of the trench with concrete backing. All hydrants
shall be installed with a six-inch double-gate valve on the branch line leading
from the main.
(4)
The hydrant shall be painted the color approved by the
Town of Goshen. Upon completion of that section of main installation, two
copies of record maps are to be forwarded to the Town Clerk. These record
maps shall show location of all valves and hydrants, and reference to all
valve locations shall be shown.
