8.
Whether piling is required for foundations.
9. Whether hypochlorinator or whether chlorinator
should be used for plants in 4.38 to 6.57 L/s
100,000 to 150,000 GPD range.
10. Whether raw sewage recirculation box
(recirculation to pumping station) is needed.
11. Whether plant is to be of aboveground or
belowground construction.
12.
Seismic loading (if necessary).
13.
Electric power characteristics for motors.
14. Whether automatic operation of air lift pumps
should be required.
15. Wind load and ice load for rotating sludge
collector.
16. Organic loading (5-day BOD) if other than that
given in the text.
17. Total suspended solids if other than given in
the text.
18. Size of hypochlorite mixing tank if larger
capacity than 113.4 L 30 gallons is needed.
19. Size of hypochlorite solution tank if larger
capacity than 208 L 55 gallons is needed.
20. Whether, for extended aeration type plant,
eventual conversion to step aeration type is
anticipated.
Hypochlorinator should be specified for all plants
4.38 L/s 100,000 GPD capacity and below.
Chlorinator should be specified for all plants 6.57
L/s 150,000 GPD capacity and above. Between 4.38
L/s and 6.57 L/s 100,000 GPD and 150,000 GPD
capacity either is suitable. Selection should be
made on basis of existing station or base practices,
local availability, and comparative costs.
**************************************************************************
**************************************************************************
NOTE: Delete paragraph when recorder-totalizer
indicator is needed. A recorder-totalizer-indicator
should be specified instead of a recorder when it is
necessary to keep records of total flow.
**************************************************************************
**************************************************************************
NOTE: Delete "Transmitting" in heading when
hypochlorinator is specified.
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SECTION 11375N
Page 65
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