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Bicycle and Pedestrian Plan Initial Study Significance Criteria The impact questions above constitute the significance standard for this environmental topic. Discussion of Checklist Items Less -than- Significant Impacts. Future development of trails, bicycle routes, and sidewalks due to implementation of the proposed Master Plan would be expected to result in few changes to the drainage patterns or little addition to site runoff as the trails and routes would be relatively narrow and /or semi permeable and thus result in minimal additional runoff. Surface water runoff may cause erosion. Most of the planned trails within hilly areas that could be subject to erosion would not be paved and thus would be not be as subject to surface water runoff as paved trails. Thus proposed Master Plan implementation would not exceed the capacity of existing or planned stormwater drainage systems or provide substantial additional sources of polluted runoff. In addition, there are no plans to alter a watercourse due to Master Plan implementation. The proposed Master Plan and its implementation would not otherwise degrade water quality. The proposed trails, bicycle routes, and sidewalks are not at any greater hazard for flood inundation due to a levee or damn failure than any other site within Pleasanton. Some of the proposed routes, like most of Pleasanton, are within the Del Valle Dam Flood inundation area. No Impact. The proposed Master Plan would not cause any hydrology or water quality impacts. No wastewater discharge would occur due to the addition of trails, bicycle routes, and sidewalks. The planning, construction and use of additional paths and trails would not result in the depletion of any groundwater resources. The proposed Master Plan includes trails, bicycle routes, and sidewalks that are located within the 100 year flood zone that could be impacted by some flooding, although such flooding would not be considered potentially significant. No structures, either residential or otherwise, are planned to be constructed within this flood zone. There is no risk of seiche, tsunami, or mudflow within Pleasanton because it is located inland. Les✓ Than Significant Potentially Impact With Less Than Significant Mitigation Significant No Issues Impact Incorporated Impact Impact 9. Land Use and Planning Would the project: a) Physically divide an established community? I I X b) Conflict with any applicable land use plan, policy, or I X I regulation of an agency with jurisdiction over the project (including, but not limited to the general plan, specific plan, local coastal program, or zoning ordinance) adopted for the purpose of avoiding or mitigating an environmental effect? c) Conflict with any applicable habitat conservation plan or I X natural community conservation plan? Environmental Setting The current pedestrian and bicycle trail system in Pleasanton is located throughout Pleasanton and intra- connects much of the community. Revised 9/4/09 22 9/4/24)09