operation.
3.4.2
Performance Testing
a.
After the UV equipment has been installed and field tested, the
Contractor shall begin performance testing. Samples shall be
collected at times when the flow through the plant is at or near
the peak flow rating from one section of the channel. Where
multiple systems are supplied, the plant flow shall be at or near
the peak flow rating of at least one system or one section of the
UV system.
b.
The samples collected shall be analyzed for the following, using
standard testing methods or procedures:
(1) [Fecal coliform] [_____] in MPN/100 mL just prior to UV
disinfection.
(2) [Fecal coliform] [_____] in MPN/100 mL just after UV
disinfection.
(3)
Total suspended solids prior to disinfection.
(4) Percent UV transmittance at 254 nm with 1 cm cell length
prior to disinfection.
c.
Performance testing shall continue for 14 days and samples shall
be collected 3 times per 24 hour period. The data obtained shall
be recorded in booklet form. Test reports shall indicate the
final position of controls.
d.
The effluent quality exiting the UV unit shall be equal to or
better than the specification requirement. Retesting shall
continue for at least 2 consecutive days or until satisfactory
bacteriological results have been obtained.
e.
The Contractor shall submit statements signed by responsible
official or representatives of the manufacturer attesting to
conformance to the specified requirements. The statements shall
be dated after performance testing has been completed, shall name
the project, and shall list the specific requirements which are
being certified.
3.5
FRAMED INSTRUCTIONS
Framed instructions under glass or in laminated plastic, including wiring
and control diagrams showing the complete layout of the entire system,
shall be posted where directed. Condensed operating instructions
explaining preventive maintenance procedures, methods of checking the
system for normal safe operation, and procedures for safely starting and
stopping the system shall be prepared in typed form and posted beside the
diagrams.
-- End of Section --
SECTION 11376
Page 21
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