FROM: Robert Thompson, General Manager
Originator: Mike Dorman, Director of Engineering
SUBJECT:
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NEWPORT BEACH PUMP STATION PRESSURIZATION IMPROVEMENTS, PROJECT NO. 5-68
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION:
Approve a contingency increase of $65,625 (7%) to the existing construction contract with Innovative Construction Solutions for Newport Beach Pump Station Pressurization Improvements, Project No. 5-68, for a total contract amount not to exceed $937,500; and a total construction contingency of $159,375 (17%).
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BACKGROUND
The Orange County Sanitation District (OC San) owns and operates eight pump stations in the city of Newport Beach. Six of these pump stations (Bitter Point, Crystal Cove, A Street, 15th Street, Lido, and Rocky Point) have inadequate venting for the wet wells, which can lead to the escape of odorous and corrosive gasses. This project will install passive air scrubbers to treat the foul air to below nuisance levels before releasing the air into the atmosphere. The project will also add a concrete slab and electrical conduits to accommodate a future chemical addition at the 15th Street Pump Station to reduce generation of hydrogen sulfide in downstream force mains. A construction contract was awarded to Innovative Construction Solutions in February 2023 to incorporate these modifications. The project is approximately 70% complete.
RELEVANT STANDARDS
* Ensure the public's money is wisely spent
* Commitment to safety & reducing risk in all operations
* Operate and maintain facilities to minimize impacts on surrounding communities, including odor, noise, and lighting
PROBLEM
During the course of construction, an unforeseen change was required to revise the odor scrubber design for the Bitter Point Pump Station, resulting in additional scrubber units and materials. This change order consumed approximately $60,000 of the total construction contract contingency of $93,750. Additional c...
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