HomeMy WebLinkAbout04.a. Receive update on Capital Projects Construction, Major Changes and Potential Change OrdersPage 1 of 6
Item 4.a.
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June 5, 2024
TO: ENGINEERING AND OPERATIONS COMMITTEE
FROM: EDGAR J. LOPEZ, CAPITAL PROJECTS DIVISION MANAGER
REVIEWED BY: GREG NORBY, DEPUTY GM - ENGINEERING & OPERATIONS
ROGER S. BAILEY, GENERAL MANAGER
SUBJECT: RECEIVE UPDATE ON CAPITAL PROJECTS CONSTRUCTION, MAJOR
CHANGES AND POTENTIAL CHANGE ORDERS
There are major construction efforts underway at several Central San facilities, including the pumping
stations and wastewater treatment plant. Capital Projects Division Manager, Mr. Edgar J. Lopez, will
provide a quick update on major changes that are ongoing, and potential costs or future actions required by
the Board of Directors. Currently, there are two projects and changed conditions that will be discussed, as
follows:
1. Maltby Pumping Station, under the Pump Station Upgrades, Phase 2A, District Project (DP) 8457,
and use of a $500,000 allowance bid item related to the Department of Toxic Substances Control
coordination and extra work. Staff will use this bid item to cover pay for replacement of the top 5 ft. of
soil at the property to limit future regulatory requirements at a cost of approximately $287,000.
2. Concrete crack sealing under the Aeration Basins Diffuser Replacement, Phase 1, DP 100019, is
expected to exceed the bid quantity and costs for this work and staff has issued a not to
exceed $200,000 work directive to the contractor to void delays to the construction schedule to
return the tank back into service by November of this year. Next year, the following basin will
require similar efforts and staff will seek authorization for a change order potentially over $200,000.
A presentation is included for discussion.
Strategic Plan re -In
GOAL ONE: Customer and Community
Strategy 1— Deliver high -quality customer service
GOAL TWO: Environmental Stewardship
Strategy 1 - Achieve compliance in all regulations
GOAL FIVE: Safety and Security
Strategy 2 - Protect Personnel and assets from threats and emergencies
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GOAL SIX. Infrastructure Reliability
Strategy 1 - Manage assets optimally, Strategy 2 - Execute long-term capital renewal and replacement program
GOAL SEVEN: Innovation and Agility
Strategy 3 - Be Adaptable, resilient, and responsive
ATTACHMENTS:
1. Presentation
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Construction Projects Summary
1. Aeration Basins Diffuser Replacement —
Phase 1, District Project (DP) 100019:
General Contractor — C. Overaa & Co.
Notice to Proceed —Aug. 28, 2023
Estimated Completion Date — Dec. 24, 2025
Time Spent — 28%
Contract Award - $12,662,000
Contract Spent — $1,599,000 (12.6%)
Change Orders to Date — $57,000 (-0.0%)
Contingency - $1,717,000
Attachment 1
2. Pump Station Upgrades— Phase 2A,
DP 8457:
General Contractor — C. Overaa & Co.
Notice to Proceed — Nov. 16, 2022
Estimated Completion Date — Oct. 31, 2025
Time Spent — 44%
Contract Award - $27,606,000
Contract Spent — $12,183,500 (44%)
Change Orders to Date — $0 (0.0%)
Contingency - $2,761,000
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1. Aeration Basins Project
Demolition of the concrete plenums has begun, the air leaks in the floor of the tank need to be
addressed prior to pouring new concrete (floor and baffle walls).
1. Aeration Basins Project - Continued
Bid item for sealing leaks in the contract, however, staff is negotiating increased bid quantity to cover
the extensive air leaks. $200,000 Work Directive issued to avoid delays. Based on this effort, a request to
the Board will be made to cover the next basin scheduled for May of 2025.
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June 5, 2024 Special EOPS Committee Meeting Agenda Packet - Page 78 of 82
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2. Pump
Stations Upgrades - Phase
2A
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2. Maltby Extra Work - DTSC
Department of Toxic Substances Control (DTSC) permit being managed with the
project by Regulatory Compliance Group.
Allowance was added into the bid for $500,000 to mitigate, remove, or include
improvements related to the permit and contaminated soils.
GHD, Inc. hired to help project for air monitoring and provide engineering and
technical assistance.
Excavations and work to date have been very successful.
Capital Projects using the allowance to remove the remaining 5 feet of soils and
install barrier at a cost of roughly $287,000 to prevent future permitting
requirements including monitoring.
No Board action required since the work was anticipated in the contract.
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Questions?
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June 5, 2024 Special EOPS Committee Meeting Agenda Packet - Page 80 of 82