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Substantive Requirements Review Landau Associates <br /> During a design-level earthquake, lateral spreading should be anticipated along the western edge of <br /> the site, where riprap-protected slopes and bulkheads are currently located.These shoreline features <br /> could experience significant, inelastic deformation. Additionally, horizontal and vertical ground <br /> displacement could occur behind existing structures located within 100 to 200 ft of the shoreline. <br /> LAI understands that liquefaction and lateral spreading will not be addressed during the initial phase <br /> of site redevelopment; however, it may be necessary to design future improvements to resist seismic <br /> hazards. Soil liquefaction could be partially or fully mitigated with ground improvement techniques, <br /> such as deep soil mixing, rammed aggregate piers, stone columns, or deep dynamic compaction. <br /> Lateral spreading could be mitigated with deep soil mixing or installation of stone columns. Stone <br /> columns would likely need to extend approximately 80 ft bgs and would need to be installed behind <br /> shoreline structures, over an area tens of feet wide. <br /> Geotechnical Engineering Report 0121049.040.041 <br /> Norton Terminal Development&MTCA 3rd Interim Action 2-7 May 7,2021 <br />