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 Specify hydrants that are cleanable without disturbing the barrel or casing
valve when shut.
Specifications must call for "approved" backflow prevention devices as
required by AFM 85-21, paragraph 2-1.
Install sufficient valving to isolate breaks and to minimize service
interruption to a small area.
Install distribution system metering to facilitate identification and
locating leaks.
Do not use galvanized pipe for service laterals. Use copper or PVC pipe
instead. Install isolation valve near connection to main. Specify valve
type to match standard valve key used by maintenance personnel.
Insure safety climbing devices are installed on all aboveground storage
tanks.
Specify detectable marking tapes to mark underground piping and cables so
they may be easily located and protected from digging equipment.
Specify valves with copper alloy stems that are resistant to dezincification.
CC.
Sanitary Sewage System:
Lift stations must be designed to preclude bypass/overflow. Provide adequate
sump storage for short power outages. Provide an electrical outlet and
transfer switch to permit connection of an emergency power generator on large
lift stations or where overflow/bypass can create a health, hazard, or
pollution problem. All switches and controls should be easily accessible.
Pumps should be rail mounted for ease in raising and lowering.
All industrial buildings, maintenance shops, or other facilities generating
wastewaters of other than sanitary wastes should be considered for connection
of such wastes to an industrial waste sewer. Wastes are to be identified--
both in characteristics and quantities--in project design analyses.
Materials for industrial waste drains, sewers, tanks, pumps, and other
features must be carefully selected for suitability with the worst case
expected waste characteristics. Once selected, these materials must be
clearly and thoroughly specified in project specifications. Also,
substitutions should be prohibited--both in the specifications and during
contractor submittal reviews.
Where necessary, pretreatment at the source should be provided. This may
include physical, chemical, or a combination pretreatment. Flammables and
troublesome solids should be removed at the source.
Avoid small, proprietory oil/grease separators that do not provide adequate
detention times or have sufficient volumetric capacities to function
adequately.
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