FROM: Robert Thompson, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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ACTIVATED SLUDGE CLARIFIERS 11 AND 13 REHABILITATION AT PLANT NO. 1 (MP1-017), SPECIFICATION NO. S-2025-692BD
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GENERAL MANAGER'S RECOMMENDATION
recommendation
RECOMMENDATION:
A. Approve a Services Contract with Vicon Enterprise, Inc. for Activated Sludge Clarifiers 11 and 13 Rehabilitation at Plant No. 1(MP1-017), Specification No. S- 2025-692BD, for a total amount not to exceed $1,950,500; and
B. Approve a contingency of $195,050 (10%).
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BACKGROUND
Orange County Sanitation District (OC San) Plant No. 1 activated sludge facility (AS1) contains 26 rectangular clarifiers that use chain and flight mechanisms to collect sludge that settles along the length of the clarifiers. Over time, the collectors are subject to degradation and wear. Clarifiers 11 and 13 sludge collectors have reached the end of their useful life and have been out of service since December 2023.
RELEVANT STANDARDS
* Sustain 1, 5, and 20-year planning horizons
* Maintain a proactive asset management program
* 24/7/365 treatment plant reliability
PROBLEM
The collectors in Clarifiers 11 and 13 at AS1 are inoperative and at the end of their useful life and need to be overhauled to provide a reliable and redundant sludge clarification system.
PROPOSED SOLUTION
Approve a Services Contract for Activated Sludge Clarifiers 11 and 13 Rehabilitation at Plant No. 1 (MP1-017), Specification No. S-2025-692BD, to restore the chain and flight systems.
TIMING CONCERNS
Delays in approving this rehabilitation (overhaul) may result in limited secondary treatment capacity and redundancy to treat peak wet weather flows.
RAMIFICATIONS OF NOT TAKING ACTION
Not rehabilitating the two clarifiers will increase the risk of not being able to adequately treat the AS1 flows.
PRIOR COMMITTEE/BOARD ACTIONS
N/A
ADDITIONAL INFORMATION
OC San solicited prop...
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