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Substantive Requirements Review Landau Associates <br /> 3.0 CONCLUSIONS AND RECOMMENDATIONS <br /> The results of LAI's geotechnical field explorations and engineering analyses indicate that the site has <br /> challenging subsurface conditions, including highly compressible, organic soils; historical foundation <br /> remnants; and seismic risks, including soils that could be susceptible to liquefaction and lateral <br /> spreading during a strong-motion earthquake. Despite these challenges, site subsurface conditions <br /> are suitable for the proposed improvements, provided the recommendations contained herein are <br /> incorporated into the project design. <br /> 3.1 Settlement <br /> Fill soils in the northern and southern portions of the site contain a high concentration of organic <br /> material (i.e., wood waste); improvements in these areas could experience long-term settlement, <br /> including primary settlement and creep. <br /> LAI developed settlement estimates for three loading conditions: (1) shipping containers on the trailer <br /> chassis, (2) shipping containers stacked two high, and (3) shipping containers stacked four high (Table <br /> 3). When preparing the estimates, LAI assumed that site grades would be raised by approximately 2 ft. <br /> The anticipated primary settlements would increase if site grades are raised more than 2 ft and/or <br /> shipping container loads are greater than indicated. <br /> Table 3.Anticipated Primary Settlement <br /> Loading Condition Anticipated Primary Anticipated Primary <br /> (includes 2 ft of new fill) Settlement in Areas with Settlement in Areas without <br /> Wood Waste(inches) Wood Waste(inches) <br /> Shipping Containers on Trailer Chassis <br /> or Single Row of Containers on Ground <14 <2 <br /> (620 psf) <br /> Shipping Containers,Stacked 2 High <19.5 <3 <br /> (920 psf) <br /> Shipping Containers,Stacked 4 High <28 <5.5 <br /> (1,580 psf) <br /> ft=feet <br /> psf=pounds per square foot <br /> Table 3 illustrates the range of settlements that can be expected based on various pavement loads <br /> and operational uses. The estimates are based on the worst geologic conditions observed in the <br /> northern half of the site and could be considered maximum settlement amounts. For comparison, <br /> Table 3 includes anticipated settlements in the southern half of the site, in areas without wood waste <br /> deposits. Limiting surface/live loads areas with wood waste would help mitigate the degree of <br /> settlement. <br /> Geotechnical Engineering Report 0121049.040.041 <br /> Norton Terminal Development&MTCA 3rd Interim Action 3-1 May 7,2021 <br />