Bid Notice.pdf
PDF 156 KB Posted
- Attached to
- Digester Nos. 1 and 3 Rehabilitation
- Solicitation number
- 25116-B
- Issued by
- Contra Costa County, Anaheim City, California
About this file
This bid notice pertains to the Digester Nos. 1 and 3 Rehabilitation Project (No. 25116) issued by Delta Diablo, a wastewater treatment facility located in Antioch, California, within Contra Costa County. The project involves comprehensive rehabilitation of two existing anaerobic digesters, including digester cleaning, concrete and coating repairs, replacement of process equipment, piping, valves, instrumentation, sludge sampling and heat exchange systems, installation of variable frequency drives (VFDs), drainage improvements, exterior coating repairs, bird netting replacement, and associated testing and commissioning. The bid invitation (25116-B) was posted on October 15, 2026, with bids due on November 10, 2026, at 2:00 PM (PDT). An onsite pre-bid meeting is scheduled for October 22, 2026, at 10:00 AM (PDT) at the Delta Diablo Treatment Plant Board Room; attendance is not required. An online Q&A period is available with a deadline of November 3, 2026, at 5:00 PM (PDT). Interested bidders should contact Sean Williams at 925-756-1926 or SEANW@DELTADIABLO.ORG for additional information.
This project is structured as a lump sum award and falls under multiple construction categories, including water and sewer line construction, heavy and civil engineering construction, and electrical contracting. Bid responses must be submitted in paper format with line items. A bid bond of 10.00% is required, along with payment and performance bonds of 100.00% each. The project is subject to a Project Labor Agreement (PLA) as outlined in Appendix A of the contract documents. No estimated bid value is disclosed in the notice. Bids should be submitted to the owner's agent through the PlanetBids Vendor Portal. The estimated start date is October 17, 2026, with specific project duration details to be determined by the awarded contractor.
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Text version
Delta Diablo
Opportunity Detail
Bid Bond
BID - Digester Nos. 1 and 3 Rehabilitation 25116-B
Title BID - Digester Nos. 1 and 3 Rehabilitation Invitation # 25116-B
Posting Date 10/15/2026 1:20 PM (PDT) Project Stage Bidding Bid Due Date 11/10/2026 2:00 PM (PDT)
Response Format Paper
Type Bid Response Types Line Items
Type of Award Lump Sum Categories 237110 - Water and Sewer Line and Related Structures Construction
237990 - Other Heavy and Civil Engineering Construction 238210 - Electrical Contractors and Other Wiring Installation Contractors 238990 - All Other Specialty Trade Contractors
Department Engineering Address 2500 Pittsburg-Antioch Hwy
Antioch, California
94509 County Contra Costa
Offer Valid Liquidated Damages Estimated Bid Value Start/Delivery Date
Project Duration
Bid Bond 10.00% Payment Bond 100.00%
Performance Bond 100.00%
10/17/26, 3:34 PM PlanetBids Vendor Portal https://vendors.planetbids.com/portal/72798/bo/bo-detail/147355 1/3
Pre-Bid Meeting Information
Online Q&A
Contact Information
Description
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Pre-Bid Meeting Yes Meeting Type Onsite
Date & Time 10/22/2026 10:00 AM (PDT) Address Delta Diablo Treatment Plant Board Room 2500 Pittsburg-Antioch Hwy, Antioch CA 94509 Attendance Required No
Online Q&A Yes Q&A Deadline 11/03/2026 5:00 PM (PDT)
Contact Info Sean Williams - 925-756-1926
SEANW@DELTADIABLO.ORG
Bids to Owner's Agent
Scope of Services The Digester Nos. 1 and 3 Rehabilitation Project (No. 25116) involves rehabilitation of two existing anaerobic digesters at Delta Diablo’s wastewater treatment plant in Antioch, California. Work includes digester cleaning, concrete and coating repairs, replacement of process equipment, piping, valves, instrumentation, sludge sampling and heat exchange systems, installation of variable frequency drives (VFDs), drainage improvements, exterior coating repairs, bird netting replacement, and associated testing and commissioning.
Other Details Notes
Special Notices Local Programs & Policies This Project is subject to the Project Labor Agreement (PLA) included in
Appendix A of the Contract Documents.
www.vendorline.com
10/17/26, 3:34 PM PlanetBids Vendor Portal https://vendors.planetbids.com/portal/72798/bo/bo-detail/147355 2/3 https://vendor.planetbids.com/
10/17/26, 3:34 PM PlanetBids Vendor Portal https://vendors.planetbids.com/portal/72798/bo/bo-detail/147355 3/3
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