Brisbane Baylands Project—Brisbane Landfill Closure Plan

Brisbane Baylands Project—Brisbane Landfill Closure Plan

The San Francisco Bay Regional Water Quality Control Board has oversight of the portion of the Brisbane Baylands Project that relates to the Brisbane Baylands Landfill Closure Plan (“Closure Plan”). The Closure Plan shall be effective upon the City of Brisbane’s (“City”) approval of the Discharger’s Plan of Development and is consistent with Provision 8 of the Waste Discharge Requirements for the Brisbane Class III Landfill, San Francisco Bay Regional Water Quality Control Board (San Francisco Bay Water Board) Order Number 01-041 (“WDRs”) (April 26, 2001). The San Francisco Bay Water Board’s oversight of the closure of the landfill and approval with conditions of the Closure Plan is being undertaken pursuant to the WDRs, as it may be amended, and Title 27. The purpose of the Closure Plan is to assure mitigation of potential risk to public health, safety, and the environment under post-development landfill conditions, as provided by the WDRs. New (post-development) project conditions are anticipated to include the following: commercial structures with associated utilities; roadways; sidewalks; solar-field area; energy storage; and open space, including water features and water detention areas. These new conditions will be identified in the City of Brisbane approved Plan of Development. Closure activities to be conducted pursuant to the Closure Plan include the following, which shall be implemented in alignment with redevelopment: ?? Earthwork site preparation, which will include removal of uncompacted, non-waste fill to not less than 5 feet above the top of the waste or above the groundwater table. Removed fill will be stockpiled for reuse on-site and on adjacent parcels. ?? Performance of deep dynamic compaction of waste or other means, as necessary, to reduce settlement of the landfill cap, landfill control systems, and the proposed future development. ?? Placement of engineered fill, landfill cover, and, as necessary, surcharge fill. As provided under Title 27, the landfill cover will include a foundation layer, a low-hydraulic conductivity layer with a hydraulic conductivity of 1x10-6 centimeters per second (cm/sec) or less, as well as erosion resistance via a vegetation layer or a mechanical erosion and ultraviolet light-resistant layer per Title 27 requirements, or alternative cover consistent with Title 27 subject to approval by the San Francisco Bay Water Board. ?? Installation of new leachate collection and transmission and landfill gas extraction systems, as well as new groundwater monitoring wells and erosion control measures to protect human health, the environment and public safety. Existing landfill systems will either be demolished and reinstalled or modified to provide ongoing landfill control and protection. The San Francisco Bay Water Board, acting as a responsible agency, approved the Closure Plan with conditions on February 28, 2025. The Closure Plan does not address potential effects of surface water bodies on the closure design. As such, the Closure Plan may not be relied upon for closure activities that affect the surface water bodies without further analysis and review by the San Francisco Bay Water Board under Title 27 of the California Code of Regulations, the WDRs, and applicable laws and regulations. As a Responsible Agency under the California Environmental Quality Act (CEQA), the San Francisco Bay Water Board independently considered the Programmatic Environmental Impact Report, the “Brisbane Baylands EIR,” certified by the City of Brisbane on July 19, 2018, before approving the Closure Plan with conditions. The City of Brisbane analyzed the effects of the landfill closure in the Brisbane Baylands EIR and adopted Findings of Fact and a Statement of Overriding Considerations. Approval of the Closure Plan with conditions will not result in any new significant effects on the environment or substantially increase the severity of significant effects identified in the Brisbane Baylands EIR. In approving the Closure Plan with conditions, the Water Board made the following determinations: 1. The City of Brisbane prepared the Brisbane Baylands EIR for the Brisbane Baylands Project (Project). 2. As identified in the Brisbane Baylands EIR, the Project will have a significant effect on the environment. 3. The City of Brisbane included mitigation measures for the Project in the Brisbane Baylands EIR. 4. The City of Brisbane adopted a mitigation reporting or monitoring plan for the Project. 5. The City of Brisbane adopted a Statement of Overriding Considerations for the Project. 6. The City of Brisbane adopted findings pursuant to CEQA for the Project. The administrative record for this project is available to the public by appointment at the following location: San Francisco Bay Regional Water Quality Control Board 1515 Clay Street, Suite 1400 Oakland, CA 94612 Additional project information is available on Geotracker: http//:geotracker.waterboards.ca.gov/profile_report?global_id=L10001853784

Brisbane

San Mateo

Citywide, Countywide

San Mateo