Planning Commission meeting agenda packet 7-9-25

City of Pleasanton—Vineyard Avenue Residential Project Consistency Checklist 15183 Consistency Checklist 118 development would be required to pay its fair share of the flood control improvement costs. Therefore, impacts related to surface water and flooding would be less than significant. The Housing Element Update FEIR indicated that new development consistent with the Housing Element Update could increase the total impervious area and increase stormwater runoff, which could exceed stormwater drainage facility capacity or create additional sources of polluted runoff. The Housing Element Update FEIR concluded that compliance with the General Plan policies and programs would maximize infiltration and rainwater retention, which would in turn reduce stormwater runoff. Additionally, all future development consistent with the Housing Element Update would be evaluated on a project-by-project basis for impacts to storm drain capacity. Further, new development would be required to pay its fair share of the storm drainage system improvement costs. Therefore, impacts related to exceedances in stormwater drainage systems or the creation of substantial additional sources of polluted runoff would be less than significant. Proposed Project Analysis and Conclusion During the early stages of construction activities, topsoil would be exposed due to grading and excavation of the site. Prior to overlaying the ground with impervious surfaces and structures, the potential exists for wind and water to transport sediment and/or urban pollutants into stormwater runoff, which could adversely affect water quality. The SWRCB regulates stormwater discharges associated with construction activities where clearing, grading, or excavation results in land disturbance of one or more acres. The City’s NPDES permit requires applicants to show proof of coverage under the State’s Construction General Permit prior to receipt of any construction permits. The State’s Construction General Permit requires a SWPPP to be prepared for the site. A SWPPP describes BMPs to control or minimize pollutants from entering existing waters through stormwater flows, and must address both grading and erosion impacts, as well as non-point source pollution impacts. Because the proposed project would disturb an area of land greater than one acre, the proposed project would be subject to the requirements of the State’s Construction General Permit and, with implementation of the required SWPPP and BMPs included therein, the proposed project would not result in a violation of water quality standards and/or degradation of water quality. Furthermore, the proposed project would be required to comply with Chapter 9.14, Stormwater Management