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3403.6.3 Referenced Standards <br />Standard <br />Reference <br />Referenced <br />In Code <br />Number Title Section Number <br />ASCE 31-03 Seismic Evaluation of Existing Buildings 3403.6.1.1.1, <br />TABLE 3403.6.1.1.2, <br />3403.6.1.1.3 <br />ASCE 41-06 Seismic Rehabilitation of Existing Buildings 3403.6.1.1.1, <br />3403.6.1.1.2, <br />TABLE 3403.6.1.1.2, <br />3403.6.1.1.3" <br />2. The aforesaid local amendments are reasonably necessary in order to lessen the <br />threat to life, safety and property represented by certain local climatic, geographical and <br />topographical conditions existing in the City of San Leandro. <br />The aforesaid local amendments are enacted pursuant to the authority of Section <br />17958.5 of the California Health and Safety Code, for the purpose of addressing the aforesaid <br />conditions which are more specifically described as follows: <br />(a) The City of San Leandro lies in the near vicinity of the Hayward Fault and <br />in fact, a substantial portion of the residential area of the City lies within <br />the Alquist-Priolo Act Special Studies Zone, requiring special geologic <br />studies prior to development. <br />(b) Recent earthquake activities, including the 1989 Loma Prieta and the l 994 <br />Northridge earthquakes, have indicated the lack of adequate design and <br />detailing as a contributing factor to damages that reduced the protection of <br />the life-safety of building occupants. <br />(c) The underlying soils are subject to liquefaction and amplification of <br />seismic energy. This increases the likelihood of seismic disturbances of <br />substantial magnitude occurring and causing consequent damage. Such <br />damage is often accompanied by structural fire. The City contains a large <br />percentage of existing structures constructed more than forty years ago. <br />9 <br />