FROM: Robert Thompson, General Manager
Originator: Riaz Moinuddin, Director of Operations & Maintenance
SUBJECT:
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MANHOLE REHABILITATION SERVICES, SPECIFICATION NO. S-2023-1391BD
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
A. Approve a General Services Contract to Ayala Engineering, Inc. to provide Manhole Rehabilitation Services, Specification No. S-2023-1391BD for a total amount not to exceed $881,750 for the period beginning July 1, 2023 through June 30, 2024, with four one-year renewal options; and
B. Approve an annual contingency of $132,263 (15%).
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BACKGROUND
The Orange County Sanitation District (OC San) owns approximately 4,400 manhole structures throughout Orange County that provide access to the wastewater collection system. Manhole structures are typically made of concrete and protectively lined with either an epoxy or PVC coating. As these assets age, the manhole structures require rehabilitation measures due to environmental corrosion, water infiltration, and age to extend their useful life. OC San currently contracts with a service provider to fulfill these needs.
RELEVANT STANDARDS
* Maintain a proactive asset management program
* Protect OC San assets
* Commitment to safety & reducing risk in all operations
PROBLEM
OC San manhole structures are typically made of concrete and protectively lined with either an epoxy or PVC coating. As these assets age, the manhole structures require rehabilitation since coating failures lead to corrosion which eventually compromise the structural integrity of the manhole. The current contracted service has reached the end of its approved renewal periods.
PROPOSED SOLUTION
Staff recommends approving a manhole rehabilitation services contract to Ayala Engineering, Inc.
TIMING CONCERNS
Once concrete or lining starts to fail on a manhole, the damage will spread if corrective action is not taken and, if left for long periods of time, can lead ...
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