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Bicycle and Pedestrian Plan Initial Study Lean that Significant Potentially Impact With Less Than Significant Mitigation Sign/ /leant Na Issues (continued) Impact Lumporated Impact Impact Seismic related ground failure, including liquefaction? 7 X iv) Landslides? X b) Result in substantial soil erosion or the loss of topsoil? X c) Be located on a geologic unit or soil that is unstable, or X that would become unstable as a result of the project, and potentially result in on- or off -site landslide, lateral spreading, subsidence, liquefaction or collapse? d) Be located on expansive soil, as defined in Table 18 -1 -B 1 X of the Uniform Building Code (1994), creating substantial risks to life or property? e) Have soils incapable of adequately supporting the use of I I X septic tanks or alternative waste water disposal systems where sewers are not available for the disposal of waste water? Environmental Setting The proposed Master Plan includes trails throughout Pleasanton, including in areas subject to severe and /or violent seismic ground shaking, seismic related ground failure (including liquefaction), landslides, unstable soil or geology, and /or expansive soil. Significance Criteria The impact questions above constitute the significance criteria for this environmental topic. Discussion of Checklist Items Less than Significant Impacts. The Alquist -Priolo map for Pleasanton shows the Alquist -Priolo special studies zone on or adjacent to some of the planned trails and bicycle routes. However, no buildings are planned within the special studies zone and, therefore, this would be considered a less- than significant impact. Although all locations within Pleasanton are subject to severe and /or violent ground shaking and although some locations are subject to seismic related ground failure, landslides, unstable soil or geology, and /or expansive soil, any structures proposed as part of this Master Plan would be subject to the Pleasanton Municipal Code. The City of Pleasanton requires all development projects to conform to the most current Ca/iknia Building Code as amended by Pleasanton Municipal Code Chapter 20.08: Building Code. Thus the City would design and build all structures to withstand predicted peak accelerations of a maximum credible earthquake. Because the Master Plan mainly includes bicycle routes and trails that would be filled with pedestrians, joggers, bicyclists, and equestrians, additional people may be subject to the seismic hazards along these Revised 9/4/09 17 9/4/2109