Planning Commission meeting agenda packet 7-9-25

City of Pleasanton—Vineyard Avenue Residential Project Consistency Checklist 15183 Consistency Checklist 114 The Alameda Countywide Clean Water Program, a consortium of 17 regulatory agencies and local governments, including the City of Pleasanton, is permitted for municipal stormwater discharge under a Municipal NPDES permit. Compliance with permit conditions includes new development and redevelopment performance standards, project development review for incorporation of stormwater BMPs to the maximum extent practicable, numeric sizing criteria for structural treatment devices, operations and maintenance of treatment measures, and limitations on increases in peak stormwater runoff discharge rates. Compliance with such is codified in Chapter 9.14, Stormwater Management and Discharge Control, of the City’s Municipal Code. As shown in the Preliminary Stormwater Treatment Plan prepared for the proposed project (see Exhibit 9), the project site would be divided into two DMAs, which generally comprise the single-family residential development area and southern park (DMA 1) and the northern open space area (STA 1). As shown in Exhibit 9, stormwater runoff from the on-site impervious surfaces within DMA 1 would be directed through a network of 10- to 18-inch storm drain lines to the proposed on-site bioretention basin at the northern site boundary. The treated on-site stormwater would ultimately be routed to the existing 24-inch storm drain line within Vineyard Avenue. STA 1 would be self- retaining, with collected stormwater allowed to pond up to three inches before flowing into the City’s existing storm drainage system. The final design of the proposed drainage system would be reviewed and approved by the City of Pleasanton, which would ensure that the proposed drainage system complies with all applicable regional and local standards, including those set forth in City’s Municipal Code, as well as requirements pertaining to the incorporation of sufficient permanent stormwater treatment control BMPs. Therefore, water quality standards or waste discharge requirements would not be violated, and downstream water quality would not be degraded as a result of operations of the proposed project. Based on the above, impacts related to water quality standards were adequately addressed in the Housing Element Update FEIR, and the proposed project would not result in any effects that would require further CEQA review for this topic.