Environmental Impact/Permitting – Final PEIR

The Clean Water Program will have a positive impact on our environment by preventing raw sewage from overflowing into San Francisco Bay. As with most infrastructure improvements, there are some temporary nuisance impacts during construction and changes associated with building new facilities. The City conducted an environmental review of the Clean Water Program that addressed potential impacts under the California Environmental Quality act (CEQA) via a Programmatic Environmental Impact Report, that was approved by City Council in June 2016.

As design has progressed, the City continues to review project elements to ensure compliance with CEQA. As part of this review, the City prepared an Environmental Impact Report for the Underground Flow Equalization System Project (formerly called the In-System Storage Facility). Below is information pertaining to the CEQA documentation the City has prepared on behalf of the Program.

Clean Water Program Final Programmatic Environmental Impact Report

The City conducted a full review of the Clean Water Program through a Programmatic Environmental Impact Report (PEIR) in 2015/2016.

The Public Works Commission received public comments on the Final PEIR and made a recommendation to the San Mateo City Council regarding certification and adoption of the Final PEIR at the May 11, 2016 Public Works Commission Meeting. A summary of the comments received with responses is available here.

The San Mateo City Council certified and adopted the Final PEIR; approved the Underground Flow Equalization System Alternative (formerly called the In-System Storage Alternative) for the Clean Water Program; and adopted required findings, a statement of overriding considerations, and the mitigation monitoring or reporting program at the June 6, 2016 City Council meeting.

Download the entire Final Programmatic Environmental Impact Report, or just the individual section you are interested in below:

Addenda to the CWP Final PEIR – Wastewater Treatment Plant Project Evaluation

Since the certification of the Final PEIR, the detailed design of the wastewater treatment plant (WWTP) has progressed.

To evaluate whether the changes to the WWTP (since the certification of the Final PEIR) could require the preparation of a subsequent or supplemental environmental impact report, the more detailed project was compared to the original project evaluated in the Final PEIR. The key changes to the project consist of slightly different locations for the various project components.

Under CEQA, if the criteria requiring the preparation of subsequent or supplemental environmental impact report are not met, then an addendum is considered to be the appropriate document. The purpose of an addendum is to update the analysis in the original EIR when there are minor project changes (in this case, the specific locations of the project components on the site).

Download the Addenda to the Final PEIR below:

Addendum 1 to the San Mateo CWP Final Programmatic Environmental Impact Report
Addendum 2 to the San Mateo CWP Final Programmatic Environmental Impact Report