June 99
5.
WATER DISTRIBUTION SYSTEM:
5.1
Design system to provide water service for maximum
domestic and irrigation requirements. Fire hydrants will be
provided if an adequate water supply is available. Flow
velocity shall not exceed 3 m/s (10 feet-per-second).
5.2
Place isolation valves to provide control over reasonably
sized area. In addition, designate valves in fire hydrant
branches and building service lines, near their connection
to feeder mains.
6.
DOMESTIC WATER PUMPING SYSTEM:
6.1
Large Systems: Use a three pump constant pressure
system with a pneumatic tank and no-flow shut-down.
6.2
Small Systems: May be two pump systems with a
pneumatic tank and operate with on-off pressure switch.
Provide controls that alternate the pumps and allow both
pumps to operate at the same time.
7.
LAWN IRRIGATION SYSTEM:
7.1
Refer to design criteria in the VA Site Development Design
Criteria for area to be irrigated and the amount of water
required.
7.2
Keep the number of irrigation system connections to
potable system to a minimum. Equip such connections
with reduced pressure-type backflow preventers.
7.3
In burial areas install the irrigation laterals in the center of a
line of graves, using the narrow grave dimension. Provide
a sample burial section layout prior to designing the entire
irrigation system. Alternate methods of design will be
considered at this review.
8.
SANITARY AND STORM SEWERAGE SYSTEMS:
8.1
Design separate underground sanitary and storm
sewerage systems, including building connections,
manholes, cleanouts, drainage inlets (yard and curb),
cooling tower waste lines, open drainage channels, dry
wells, etc., and all appurtenances. Storm drainage system
shall serve all areas under construction or affected by
construction.
VA Design Guide -- National Cemetery Administration
Page 5 -89
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