NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)
NEMA 250
(2003) Enclosures for Electrical Equipment
(1000 Volts Maximum)
NEMA ICS 1
(2000) Industrial Control and Systems:
General Requirements
NEMA MG 1
(2003; R 2004) Motors and Generators
THE SOCIETY FOR PROTECTIVE COATINGS (SSPC)
SSPC SP 10
(2000) Near-White Blast Cleaning
1.2
SYSTEM DESCRIPTION
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NOTE: Delete either paragraph Extended Aeration
Plant Design or Contact Stabilization Plant Design.
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1.2.1
Extended Aeration Plant Design
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NOTE: If effluent standards require a 5-day B.O.D.
of less than 10 mg/L, then effluent filters are
recommended. The filtration unit shall be [one]
[two] [single] [dual] media filter cell(s), with
backwash and backwash holding tanks, and related
pumps, blowers, valves, piping, and control devices.
Insert design and peak flow rates. Comply with TM
5-814-3 for design flow rates. Peak flow rate
should be 3 times design flow for plants up to
57,000 L per day (15,000 gpd) design flow. Peak
flow should be 2.5 times design flow for plants
between 57,000 L per day (15,000 gpd) and 380,000 L
per day (100,000 gpd) design flow. Short term peak
flow rate should be 4 times the design flow
expressed as an hourly rate which does not
necessarily correspond with the peak daily flow
expressed in L per day (gpd). Verify percent
suspended solids and BOD removal.
Provide seismic details, if a Government designer
(either Corps office or A/E) is the Engineer of
Record, and show on the drawings. Delete the
bracketed phrase, in the last sentence, if no
seismic details are provided. Sections 13080 and
15070A, properly edited, must be included in the
contract documents.
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Treatment of wastewater shall be accomplished through intimate contact with
activated sludge for a minimum of 18 hours followed by gravity
clarification and chemical disinfection. The treatment plant shall be
sized for a design flow of [_____] L per day gpd and a peak daily flow of
[_____] L per day gpd. The treatment plant shall remove a minimum of [90]
SECTION 11390
Page 7
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