Delta Diablo Secondary Process Improvements
3 Documents in Project
Summary
SCH Number
2024080857
Lead Agency
Delta Diablo Sanitation District
Document Title
Delta Diablo Secondary Process Improvements
Document Type
NOD - Notice of Determination
Received
Posted
2/19/2026
Document Description
Notice of Determination in compliance with Section 21108 or 21152 of the Public Resources Code. The modified project includes minor refinements to equipment locations, building configurations, and phasing. The return activated sludge pump station has been relocated and existing blower building space will be repurposed for additional equipment. Phase 1 may now include a third aeration basin with hydrocyclones, demolition of an existing basin, and removal of the trickling filters and their odor control facilities. It also replaces gravity belt thickeners with rotary drum thickeners an auxiliary fuel tank.
Contact Information
Name
Sean Williams
Agency Name
Delta Diablo
Job Title
Senior Engineer
Contact Types
Lead/Public Agency / Project Applicant
Phone
Email
Location
Cities
Antioch
Counties
Contra Costa
Regions
Citywide
Cross Streets
Pittsburg Antioch Highway and Arcy Lane
Zip
94509
Notice of Determination
Approving Agency
Delta Diablo
Approving Agency Role
Lead Agency
Approved On
County Clerk
Contra Costa
Final Environmental Document Available at
www.deltadiablo.org/key-capital projects or at 2500 Pittsburg Antioch Highway, Antioch CA 94509
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
Yes
(4) A mitigation reporting or monitoring plan was adopted for this project
Yes
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
No
Attachments
Notice of Determination
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