# San Mateo Civicplus #886

San Mateo Digester 1 Cleaning and Surface Preparation Solicitation

**Posted:** September 16, 2026
**Respond By:** October 14, 2026
**Identifier:** 886
**NAICS:** 238910, 562910

San Mateo is seeking a contractor to clean and prepare the interior surfaces of Digester 1 at its wastewater treatment facility, supporting biogas and biosolids evaluation.
- Government Buyer:
  - City of San Mateo, California
  - Department: Public Works
- Scope of Work:
  - Cleaning and interior surface preparation of one anaerobic digester (Digester 1)
  - Removal and offsite disposal of remaining digester contents
  - High-pressure washing of interior surfaces
  - Erection of interior scaffolding
  - Preparation of surfaces for inspection and condition assessment
- Products/Services Requested:
  - Anaerobic digester cleaning (1 unit)
  - Inspection and condition assessment preparation (1 unit)
- Unique/Notable Requirements:
  - Contractor must hold a valid California Class A license
  - Mandatory purchase of bidding documents from Barker Blue
  - Compliance with San Mateo County Health Orders
  - Project subject to prevailing wage requirements and California Department of Industrial Relations monitoring
- Estimated Construction Cost:
  - $1,100,000
- OEMs and Vendors:
  - No specific OEMs or product manufacturers are named; Barker Blue is the document provider
- Period of Performance:
  - 130 working days from Notice to Proceed


### Description

This solicitation is for the cleaning and interior surface preparation of one existing anaerobic digester (Digester 1) to support inspection and condition assessment. The project includes removal and offsite disposal of remaining digester contents, high-pressure washing of interior surfaces, erection of interior scaffolding, and surface preparation. Subsequent repair and coating will be performed under a separate contract. Bidders must purchase contract documents from Barker Blue to be eligible to bid, and the estimated construction cost is $1,100,000.

[View original listing](https://www.cityofsanmateo.org/bids.aspx?bidID=886)