Secondary Treatment Upgrades

2 Documents in Project


SCH Number
Public Agency
State Water Resources Control Board
Document Title
Secondary Treatment Upgrades
Document Type
NOE - Notice of Exemption
Document Description
The Project will expand the capacity of conventional activated sludge in the four existing aeration tanks and six existing secondary clarifiers through 2054 with an membrane aerated biofilm reactor (MABR)-activated sludge process, which would provide additional capacity in the existing aeration tanks by intensifying the process so no new aeration tank volume would be required. The Project also includes MABR cassettes installed in the second and third anoxic zones, and one set of internal mixed liquor recycle pumps would be to expand capacity through 2054. Each of these components would be located in the four existing aeration tanks.

Contact Information

Cedric S. Irving
Agency Name
State Water Resources Control Board
Job Title
Environmental Scientist
Contact Types
Lead/Public Agency


Palo Alto
Santa Clara
Other Information
The Project is located on a 25-acre site between Highway 101 and San Francisco Bay in the city of Palo Alto, Santa Clara County, California. The treatment plant is bounded to the north and east by Embarcadero Road, to the west by Embarcadero Way, and to the south by an unmarked service road.

Notice of Exemption

Exempt Status
Categorical Exemption
Type, Section or Code
Section 15301, Class 1; and Section 15301, Class 1; and Section 15301, Class 1
Reasons for Exemption
The Project involves upgrades including repairs and minor alterations, replacement or reconstruction, as well as construction of a limited number of new small facilities or structures.
County Clerk
Santa Clara


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