[Adopted 11-10-1981 by Ord. No. 85; amended in its entirety 4-6-2011 by Ord. No. 296]
The intent of this Part is to:
A.
Promote the general health, welfare and safety of the community.
B.
Encourage the utilization of appropriate construction practices in
order to provide water for fire protection and domestic consumption
in the future.
C.
Minimize danger to public health and safety by providing a public
water system for fire protection and domestic consumption.
D.
Reduce financial burdens imposed on the community, its governmental
units and its residents by preventing the unwise design and construction
of public water systems that will not provide sufficient water for
fire protection and domestic consumption.
E.
Specify minimum system sizes, flow rates, water storage capacity
and construction materials that shall be used in the design and construction
of a public water system.
F.
Reduce the required parts inventory and increase the efficiency of
maintenance by requiring that each type of appurtenance or component
of the public water system be a standard design.
This Part, by reference, hereby incorporates the most recently
published edition of the following standards pertaining to design,
construction, testing and maintenance of public water systems as part
of this Part:
A.
Standard Specifications and Details of Upper Makefield Township as
approved by separate resolution.
B.
Public Water Supply Manual, Community System Design Standards, by
the Pennsylvania Department of Environmental Protection, Harrisburg,
Pa.
C.
Guide for Determination of Needed Fire Flow by the Insurance Services
Office (ISO), as modified.
D.
American Water Works Association Standards and Manuals by the American
Water Works Association, Denver, Colorado.
E.
Additional standards incorporated by reference in the Standard Specifications
and Details, or as the Township Engineer may deem applicable to a
particular design and construction detail.
F.
If more than one standard governs any item, then in that event, the
most stringent or highest standard shall apply.
All standards referenced are to be the latest revision thereof,
including future revisions and amendments.
Should a dispute arise concerning the interpretation of the
above standards as they relate to each other, or to the minimum standards
specified in this Part, an initial determination shall be made by
the Township Engineer. Any person who disagrees with the initial determination
made by the Township Engineer may seek a waiver of the standard by
submitting a written request to the Upper Makefield Township Board
of Supervisors.
As used in this Part, the following terms shall have the meanings
indicated:
The Design Flow Rate for the public water distribution system
shall include the fire flow rate plus the maximum anticipated flow
rate for all other purposes.
The design fire flow rate shall be determined using the ISO
Guide for Determination of Needed Fire Flow, or this Part, whichever
is the greater.
One or more sources of water serving more than one user unit
(residence, business, church, school or combination thereof). All
public water systems shall be designed and constructed as dual-purpose
systems able to supply enough water for fire protection, while at
the same time meeting the anticipated consumption for other purposes.
The design residential average flow rate shall be 100 gallons
per day, per capita. The determination flow rate shall be based upon
four persons residing in each dwelling unit.
All other flow rates shall be determined by the Township Engineer
pursuant to standard engineering practices for similar uses and shall
be approved by the Township Board of Supervisors.
A single user of water such as a household, a business, a
church or a school.
A.
Water
supply system facilities shall encompass sources, pumping, transmission
and treatment to provide the best quality water for human consumption,
and comply with all applicable federal and state safe drinking water
regulations. Water supply facilities shall be designed giving consideration
to future consolidation or interconnection of individual public water
systems. Facilities shall be designed so that they can be readily
increased in capacity.
B.
The capacity
and sizing of water supply facilities shall be adequate to supply
the water demands of the service area in the design year. The total
capacity of developed sources shall equal or exceed the design maximum
daily demand, and be sufficient to replenish the fire protection storage
volume within a twenty-four-hour period while meeting the average
daily demand. In addition, the average daily demand must be satisfied
with the largest production source out of service. Booster pumping
systems shall consist of at least three units with capacities such
that the design flow rate can be satisfied with the largest pump-out
of service.
A.
Type of system. The water storage system shall be an elevated gravity
water storage system, a ground-level storage tank, or a below-ground
pumped water storage system. For elevated systems where high ground
is available, the gravity water storage system shall be constructed
at the highest ground-level location. If high ground is not available,
a ground-level storage tank with a pumping system shall be constructed
to supply the distribution system. Both elevated and ground-level
systems shall be designed and constructed in accordance with accepted
engineering practices and shall be acceptable to the Township Engineer
and the Board of Supervisors. If the system is a below-ground storage
system, the system shall have a five-inch stand pipe in an area accessible
to fire trucks and equipment.
B.
Minimum storage capacity. The minimum storage capacity shall be determined
from the consideration of three factors. These are the design fire
flow rate and duration, the maximum daily consumption (demand) and
a reserve volume to supply the public water system during emergency
conditions. The minimum required storage capacity will be determined
by the Township Engineer pursuant to accepted engineering practices.
Emergency measures that shall be considered by the Township Engineer
in determining the minimum required storage capacity include:
(1)
Interconnection with another water distribution system that meets
the minimum storage capacity requirement.
(2)
The provision of an independent auxiliary power source for all electrical
components of the water system.
(3)
Availability of an alternate source of water supply.
(4)
Any other emergency measures acceptable to the Township Board of
Supervisors.
C.
Minimum residual operating pressures. The water storage system shall
be designed so that it will provide a minimum of 20 pounds per square
inch gauge residual pressure throughout the water distribution system
during the periods of Design Flow Rates.
D.
Accessibility to fire trucks. The water storage system shall have
a fire hydrant or stand pipe installed at its site. The water storage
system and the fire hydrant or stand pipe at its site shall have a
paved turnaround area to make the water and fire hydrant accessible
to fire trucks serving Upper Makefield Township.
A.
General requirements. The general requirements for the water distribution
system are that it shall:
(1)
Be a looped distribution network.
(2)
Be designed based upon fire flows determined from the ISO Guide,
as amended, and made a part of this Part, except that minimum fire
flow rates shall be no less than 1,500 gallons per minute.
(3)
Provide a residual pressure of 20 psig at all points in the distribution
system under fire flow conditions and maximum daily demand.
(4)
Be constructed of ductile iron pipe, cement-lined, manufactured and
installed in accordance with the Standard Specifications and Details.
(5)
Have a minimum number of gate valves installed along the water mains
at such intervals and locations that no more than 800 lineal feet
of water main shall have to be closed down in case of repairs to or
breaks in the water main. Additional gate valves designed to minimize
inconvenience during shut down for repairs shall be installed at tee
and cross fittings, and as designated by the Township Engineer pursuant
to accepted engineering practices.
(6)
Have fire hydrants installed:
B.
Water main terminations. Water distribution system mains shall not
begin or terminate under paved areas, or within tax parcels. It is
intended that the water distribution system shall be a looped system,
therefore:
(1)
Water distribution system mains within a land development area shall
be extended to the outer limits of the land development property for
connection to existing mains or possible future mains only if required
by the Township.
(2)
Water distribution system mains shall be constructed along all existing
roads abutting a land development for the full length of the existing
roadway frontage.
C.
Water service lines. Each user unit shall have its own water service
line. Each water service line shall:
(1)
Be connected to the water distribution system main with a corporation
stop.
(2)
Have a curb shutoff valve and valve box located according to the
Standard Specifications and Details, or as determined by the Township
Engineer.
(3)
Have a cold water meter installed inside the users units' building(s)
at a location approved by the Township Engineer, or his designated
representative, and in accordance with the requirements of this Part
and such rules and regulations which may be adopted by separate resolution
by the Township.
All cold water meters in the public water system shall be furnished
and installed by the Township pursuant to the following:
A.
A properly completed application for water service is filed on the
form prescribed by the Township.
B.
The Township has received payment for all applicable charges and
fees.
C.
The location of the water meter has been approved.
D.
The service line has been installed from the distribution main to
the curb stop and to the building to be supplied with potable water
service, and the service line installation has been inspected by the
Township.
E.
Installation of a meter insetter has been completed at the approved
meter location, or when determined by the Township to be necessary,
a meter pit has been installed at a location approved by the Township.
F.
The Township has inspected the meter insetter or meter pit and verified
satisfactory installation in accordance with the Standard Specifications
and Details.
