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Pleasanton Gateway Environmental Checklist Less Phan Potentially Signiticatrt Less 'Phan Significant With Mitigation Significant No Issues (Continued) Impact Incorporated Impact hnpact c) Be located on a geologic unit or soil that is unstable, or 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 of the Uniform Building Code (1994), creating sub- stantial risks to life or property? e) Have soils incapable of adequately supporting the use of septic tanks or alternative wastewater disposal sys- tems where sewers are not available for the disposal of wastewater? ^ ^X ^ ^ ^X Discussion a-i-iii) The subject site is located in the Alquist-Priolo Earthquake Fault Zone as delineated by the Cali- fornia Division of Mines and Geology. The project would be subject to potential damage from earthquake ground shaking as a maximum intensity of VIII of the Modified Mercalli Scale. The State of California provides minimum standards for building design through the California Building Standards Code (California Code of Regulations (CCR), Title 24). The California Uni- form Building Code is based on the UBC and has been modified for California conditions with numerous more detailed and/or stringent regulations. Specific seismic safety requirements are set forth in Chapter 23 of the UBC. The State earthquake protection law requires that buildings be designed to resist stresses produced by lateral forces caused by earthquakes. "1'he City imple- ments the requirements of the California Code through its building permit process. "fhe pro- posed project will be required to comply with the applicable codes and standards to provide earthquake resistant design to meet or exceed the current seismic 'Lone 8 requirements. There- fore, this would be aless-than-significant-impact. a-iv) The site is generally flat and, therefore, will not be subject to landslides. Therefore, this would be no-impact. b-d) Natural erosion is frequently accelerated by human activities such as site preparation for con- struction. Grading and excavation and trenching for on-site utility lines, will disturb soils, which could increase the rate of erosion if controls or best management practices are not in place. "I'he City requires that all projects meet the requirements for stormwater control measures during de- sign, construction and implementation phases of the project. Grading is prohibited from October 15 to April 1 to reduce Citywide impacts. Therefore, this would be a les-then-signifrcant- impact. e) "fhe project will be connected to the sanitary sewer system. Therefore, this would be categorized as no-impact. Pleasanton Gateway Initial Study Page 21 of 37 November 8, 2006