FROM: James D. Herberg, General Manager
Originator: Rob Thompson, Assistant General Manager
SUBJECT:
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SHALLOW REBAR REPAIR SERVICES
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION: Recommend to the Board of Directors to:
A. Approve a Purchase Order service contract to Tharsos Inc. to provide Shallow Rebar Repair Services, per Specification No. S-2020-1161BD, for a total amount not to exceed $272,797 for the period beginning August 1, 2020 through July 31, 2021, with four, one-year renewal options; and
B. Approve an annual contingency of $13,640 (5%).
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BACKGROUND
The Orange County Sanitation District (Sanitation District) has various concrete structures throughout its two treatment plants in Fountain Valley and Huntington Beach. These structures require maintenance to keep them operable. The purpose of this contract is to provide expeditious repairs to concrete structures with shallow or exposed rebar to prevent corrosion and reduce erosion due to exposure.
RELEVANT STANDARDS
* Protect Orange County Sanitation District assets
* Maintain a proactive asset management program
* Sustain 1, 5, 20-year planning horizons
PROBLEM
The Sanitation District has identified multiple instances of exposed rebar in several primary basins at Plant No. 1. Close examination and inspection determined that the rebar was installed too shallow during construction, within an inch of the surface in some areas. Some of the rebar has spalled and become exposed.
PROPOSED SOLUTION
Award a blanket purchase order contract to perform repairs and seal the exposed rebar areas to prevent further corrosion, deterioration, and spalling. This contract will serve as a blanket contract for expeditious repairs of shallow rebar areas identified during condition assessments performed at Plant Nos. 1 and 2 on an as-needed basis. All repairs will be priced per the unit rates in the bid to include square footage of the repair, scaffolding...
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