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City of Pleasanton 2023-2031 (6th Cycle) Housing Element Update CEQA Findings of Fact and Statement of Overriding Considerations 46 FirstCarbon Solutions Https://adecinnovations.sharepoint.com/sites/PublicationsSite/Shared Documents/Publications/Client (PN-JN)/2148/21480022/FOF/21480022 Pleasanton Housing Element FOF.docx Surface Runoff: Future development consistent with the Housing Element Update encourages infill development. New development or redevelopment could increase the total impervious area within the city and increase stormwater runoff. Implementation of applicable General Plan policies would maximize the on-site infiltration capacity for future development and would minimize the off-site runoff that would leave those sites. Water Element Program 1.13 encourages the planting of drought-tolerant landscaping to help decrease runoff and minimize impervious surfaces; Program 6.1 encourages new development to utilize reclamation methods to fullest extent financially and environmentally feasible; Program 10.1 requires the City to review development plans to minimize impervious surfaces and generally minimize infiltration of rainwater in soils; and finally, Program 9.1 requires new development to pay its fair share of the flood control improvement costs included in Zone 7’s Master Plan. The General Plan also includes Water Element Policy 11, which requires implementation of stormwater runoff requirements, as required by the State RWQCB and the Alameda Countywide Clean Water Program, with as little impact on development and business costs as possible. In support of this policy, the General Plan includes Programs 11.1, 11.2, 11.3, 11.4, 11.5, 11.6, and 11.8, all of which encourage new development to incorporate conditions of approval developed by the Alameda Countywide Clean Water Program, adhere to design guidelines that comply with clean water runoff requirements, incorporate site planning and design techniques that reduce runoff into waterways, and use BMPs for construction activities to reduce unintended runoff. The Municipal Code contains rules and regulations to maximize on-site infiltration capacity. Section 17.08 (Flood Damage Protection) provides requirements to reduce flood losses due to water or erosion hazards, including the provision of facilities which serve such uses. All future development would be evaluated on a project-by-project basis to ensure that there are no significant impacts related to surface runoff and flooding and would be required to pay its fair share of the flood control improvement costs. Exceedance of Storm Drain Capacity: The Housing Element Update encourages development on infill sites and discourages development on hillsides. With the exception of Sites 1 (Lester) and 22 (Merritt), which are located adjacent to hillsides, none of the sites are located near a hillside. General Plan policies and programs and Municipal Code requirements would maximize the on-site infiltration capacity and would minimize off-site water runoff. All future development would be required to comply with the General Plan policies and programs related to stormwater capacity, specifically Water Element Policy 8, which ensures adequate storm drainage system to serve existing and future development. Program 8.1 requires new development to pay its fair share of the storm drainage system improvement costs, and Program 8.4 requires new development to improve local storm drainage systems to accept appropriate design-year flows resulting from new development, as determined by the City Engineer. Policy 4.2 of the Housing Element directs the City to ensure that adequate infrastructure is available to support future planned residential growth and Program 4.4 requires the City to develop and updates plans as necessary to address infrastructure deficiencies, including funding mechanisms; the City would make infrastructure improvements as needed to accommodate projected housing growth, which would generally be funded through the Capital Improvement Program, in turn funded by the General Fund and developer impact and connection fees. Storm drainage infrastructure would be included in this infrastructure planning and development. Future development would be evaluated on a project-by-project basis for impacts to