| (a) Safe pump operation. The installation of a pump
and component parts shall provide safe operation in accordance with
manufacturer's instructions.
(b) UL and NEMA requirements. A pump shall comply with
UL or National Electrical Manufacturers Association requirements.
Motors shall comply with UL requirements for motors and shall be constructed
electrically and mechanically to perform satisfactorily and safely
under the conditions of load and environment normally encountered
in lagoon installations.
(c) Backflow prevention. A priming device for a pump
receiving piped water from a public water supply providing potable
water shall be isolated from the potable supply by means of a cross-connection
control device (backflow prevention device) approved by the TCEQ or
local regulatory authority.
(d) Backflow prevention assembly testing. A backflow
prevention assembly shall be tested upon installation and certified
to be operating within specifications by a licensed backflow prevention
assembly tester. A backflow prevention assembly shall be tested and
certified to be operating within specifications at least annually
by a licensed backflow prevention assembly tester. Documentation of
testing and certification shall be kept for at least three years and
shall be provided during an inspection.
(e) Pumps and motors. A pump or motor provided for
circulation of water shall meet the filter design range of flow required
for filtering and cleaning the filters against the total dynamic head
developed by the complete system and to meet required water clarity.
(f) Cleanable strainer or screen. For a lagoon constructed
on or after the effective date of this subchapter, a pump, except
a pump with a vacuum filter, shall have a cleanable strainer or screen
upstream of the circulation pump to remove waste that shall be readily
accessible and cleaned as per manufacturer's instructions.
(g) Motors. A motor shall:
(1) be capable of operating the pump under full load
with a voltage variation of plus or minus 10% from the nameplate rating;
(2) have thermal or current overload protection, either
built in or in the line starter, to provide locked rotor and running
protection; and
(3) comply with UL requirements.
(h) Emergency shutoff switch. An emergency shutoff
switch shall be provided for service personnel to disconnect all power
to circulation and jet system pumps. An emergency shut-off switch
shall be readily accessible to operators and located within sight
of the lagoon and not more than 50 feet from the lagoon.
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