Laserfiche WebLink
2�'nvironmental Analy.ras <br /> whe�e sewers are not available for the <br /> disposal of wastE water? <br /> a)Expose people or sttuctures to paterltial substaxrtial adverse ef}`'ects, mcluding tbe tisk of <br /> IOSS�ltlrillY� Ot'deatll lYlVpIV1Il�.• <br /> Y)Ruptute ofa l�owr� earthyuake fault, as delir�eated air the rr,�ostrecer�tAlquist Prtolo <br /> Eatthquake FairltZorlingMap issued by the State Geologistfor the area ar based ori <br /> other suhstantial evidence afa Irnoum fault.�Refer to D�vision ofMi�es and Geology <br /> Special PublXCatior142. <br /> The majar known faults in the vicinity of the project include the San Andreas Fault(45 nvles <br /> southwest of project area), the Hayward Fault (13.1 xni�es northeast of project are),and the San <br /> Gregari.o Fault (18.5 rrules southwest of ptoject area}. Figure PS-1 of the Public Safety Element <br /> of the City General Plan shows the locations of regional fault within the City (City af Redwood <br /> City,2011). The proposed project would not be within an Alquist-Prio�o Earthquake Fault Zone <br /> as indicated by Figure PS-1 and PS-2 in the Ciry General Plan (City of Redwood Ciry,2011). <br /> Therefore, there is a Iow potential for impacts associated with surface niptures from a known <br /> fault zone. (No Impact} <br /> ii) Strar�gsersrnrcground shakit�g.� <br /> A major seismic event on the San Andreas Fault, the fault cZosest ta the project,would result in <br /> strong to ver9 strong seismic ground shaking in the project area. National Earthquake Hazards <br /> Reducrion Program (NEHRP} data,provided by the USGS, deternzined that the esrimated peak <br /> ground accelerauon (pga) at the site during maximum magnitude eaxthquakes,having a <br /> 1 p percent pxobability of exceedance within 50 years (a seismic recurrence interval of one event <br /> within 475 years) is appxo�umatel�0.59g(CE&G, 2013}. The joint-use path and pump station are <br /> not considered lifeline facilities, and the recommendarions in the CE&G report (Appendix F� do <br /> not xequire design for this peak acceleration, but include design criteria for the rieback and <br /> retaining walls of the joint-use path. The proposed facalities would be designed in accordance <br /> with the Califarnia Building Code, but could experience damage to the pxoject walls, structures, <br /> and unc{erground faciliries from this ground shaking. 7'he proposed project would not affect the <br /> integrity of the US 101 freeway bridge. Damage to nonessential faciliries such as the praposed <br /> jaint use path cauld be xepaired relati�ely easily and would not Yesult in a significant loss of City <br /> facilities. In the event of damage,the City would close the access gates ta the joint-use path so <br /> that the risk to the public from struct�aral damage resulting from seismic ground-shaking would <br /> be less than significant. (Less ti�a�Significant Irnpact) <br /> rrr}Seismic-relatedground failure, ir�cludingliquefac�iotr? <br /> Liquefaction occurs when strong ground shaking causes loose,satizrated,and unconsolidated <br /> sediments to lose strength and behave in tluid-like characterisrics. The alluvium encountered <br /> 2-30 US 901 Pede.rtriasa U�adercvros�ing and Bair <br /> Island Road Storfn Drain Pump Statiora Project <br />