NEW DEVELOPMENT
Provision C.3 in the MRP requires site designs for new developments and redevelopment projects to minimize impervious surfaces such as the area of new roofs and paving. Where feasible, pervious surfaces should be used instead so runoff can infiltrate the underlying soil. Remaining runoff from impervious areas must be captured and used or treated using bio-retention systems. In some cases, the rates and durations of site runoff must also be controlled.
Project applicants must also execute agreements to allow municipalities to verify that stormwater treatment and flow-control facilities are maintained in perpetuity.
The California Regional Water Quality Control Board for the San Francisco Bay Region reissued the MRP in May 2022 which was amended in 2023. The permit regulates stormwater discharges from municipal storm drains operated by 76 local government entities, including those in Vallejo.
The City of Vallejo consulted with the Contra Costa Clean Water Program staff and adopted the CCCWP Stormwater C.3 Guidebook and associated guidance for use in Vallejo.
C.3 requirements are separate from, and in addition to, requirements for erosion and sediment control and for pollution prevention measures during construction.
Effective May 17, 2017, projects that create or replace 2,500 square feet or more, but less than 10,000 square feet, of impervious surface must prepare and submit a Stormwater Control Plan for Small Land Development Project. Please refer to the latest guidebook page below for more details: