1.6
QUALITY ASSURANCE
1.6.1
Sewage Treatment Plant Layout Drawings
Show the complete assembly of the plant with all components, equipment, and
parts, each with an assigned number corresponding to the plant
manufacturer's parts list.
1.6.2
Sewage Treatment Plant Component Drawings
Show construction details for each component and piece of equipment,
including aeration tank, settling tank, aerobic digester, chlorine contact
tank, blower assembly, diffuser layout, pump assemblies [comminutor
assembly] [mechanical aerator assembly] support slab, mechanical sludge
collector assembly, [chlorinator assembly] [hypochlorinator assembly]
appurtenances, and all piping and wiring.
1.6.3
Diffuser Layout Drawings
Show construction details for the diffuser layout including diffusers,
diffuser holders and diffuser holder assemblies blower assembly, and air
piping layouts.
1.6.4
Mechanical Aerator Drawings
**************************************************************************
NOTE: Delete the bracketed phrase when step
aeration type of complete mixing type is specified
or when mechanical aerator is not allowed for
extended aeration type. See Notes A and C located
at rear of text.
**************************************************************************
Show manufacturer's suggested geometry in sufficient detail for
construction. [Show construction details for the mechanical aerator
assembly, including shroud and draft tube (if used).]
1.6.5
Excavation and Backfilling
Include specific instructions for excavation and backfilling as
interrelated to plant installation and any special concrete work necessary
for setting of settling tanks.
1.6.6
List of Prior Installations
Submit a list of installations where plants of
similar type as herein
specified have been constructed, including the
date of construction and
capacity of the plant. Certify that the plant
furnished and installed is
the latest model and that spare parts therefor
are available.
1.6.7
Sewage Treatment Plant Performance Test Reports
Reports of performance evaluation tests by the National Sanitation
Foundation (NSF) are required on the type of plant submitted for this
project. These tests shall be carried out in conformance with the criteria
based on the use of the Standard Performance Evaluation Method of the NSF
report. The test shall be based on the subdivision flow pattern. For all
units not tested by NSF, reports of independent performance tests are
required on the type of plant submitted for the project. These tests shall
SECTION 11375N
Page 20
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