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August Study Session on the Wastewater Treatment Plant Upgrade and Expansion Project

The San Mateo community is invited to attend a Planning Commission Study Session on August 8 at 7:30 p.m. The session will be held at City Hall in the City Council Chambers during the regularly scheduled commission meeting.

The study session will feature a presentation on the design concepts for the planned upgrade and expansion of the treatment plant on a preliminary basis. The Clean Water Program is currently in the process of applying for a special use permit for this project from the City, and this Planning Commission study session is part of that permitting process.
The upgrade and expansion of the treatment plant is the largest project in the Clean Water Program. It is also the largest rehabilitation of the plant since the 1970s. This project includes new liquids treatment process facilities, a new administration building, and other general plant upgrades.

For a summary of the background of and need for this project, please visit the Clean Water Program website.

City Council Selects Location for In-System Storage Facility

San Mateo’s existing wastewater system capacity is insufficient to address the wet weather flows that occur in the winter months and lead to sanitary sewer overflows (SSOs). To address this issue, a comprehensive approach to improve capacity involving an underground, in-system storage facility upstream of the wastewater treatment plant is planned.

On July 17, 2017, the City Council selected the San Mateo County Event Center for the location of the underground storage facility. The Event Center is near where the most SSOs have historically occurred, near the intersection of South Delaware Street and 25th Avenue. The northeast corner of the property, where the RV Storage Lot is located, will be used for the facility.

This facility will be capable of temporarily storing approximately 5 million gallons of wastewater during heavy rains. During these conditions, flows will divert from the sewer pipes to the storage facility to prevent overflows from occurring. After a storm subsides, and generally within 24 hours, wastewater in the facility will be pumped back into the collection system pipes and conveyed to the wastewater treatment plant.

Do You Know These 3 Ways to Prevent Costly Sewer Backups?

The Association of Bay Area Governments’ Be Sewer Smart program highlights three effective strategies for property owners to prevent costly sewer backups into their homes or businesses. 
Do you know the three?
  1. Maintain your sewer system. Proper maintenance is key to avoiding issues. Contact a plumber to schedule a simple and inexpensive home inspection to discover any hidden issues.
  2. Consider installing a backflow prevention device. Backflow prevention devices (BPD) allow water and backup materials to escape from the cleanout rather than flowing into the home. Hint: if your plumbing system is located below the cleanout or less than one foot above the nearest uphill sewer main manhole – you need a BPD.
  3. Choose and plant trees carefully. Did you know that certain trees and plants can invade and clog your system? This planting guide can help you avoid harmful ones.
About the San Mateo Clean Water Program
The Clean Water Program is a 10-year comprehensive plan to upgrade the aging wastewater collection and treatment system with advanced infrastructure that will provide reliable services and protect public health and the environment for years to come. 
For more information, visit www.CleanWaterProgramSanMateo.org
Copyright © 2017 City of San Mateo - Clean Water Program, All rights reserved.


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