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1 <br /> September 24, 2018 <br /> HWA Project No. 2015-061-21 <br /> values provided. For passive earth pressure restraint force determination, we recommend a <br /> factor of safety of not less than 1.5 and 1.1 be utilized for the static and seismic loading <br /> conditions, respectively. <br /> 1 Table 4—Equivalent Fluid Earth Pressures for the Active Case <br /> Equivalent Fluid Earth Pressures—Active Case <br /> I Soil Unit <br /> Static Seismic Post-Liquefaction <br /> I Old Fill Above GWT=31 pcf Above GWT=45 pcf Above GWT=31 pcf <br /> (KA=0.25) <br /> (El.+13.0 ft to Below GWT=78 pcf Below GWT=85 pcf <br /> El.-2.0 ft) (KA=0.25) (KAE=0.36) Below GWT= 117 pcf <br /> I (KA=0.87) <br /> Peat/Alluvium <br /> 82 pcf(KA=0.37) 88 pcf(KAE=0.49) 82 pcf(KA=0.37) <br /> (El. -2 to-7 ft) <br /> ISandy Silt <br /> (El. -7.Oftto <br /> 78 pcf(KA=0.25) 85 pcf(KAE=0.36) 117 pcf(KA=0.87) <br /> El. -12.Oft) <br /> Above El. -37ft= 111 pcf <br /> Sand Alluvium (KA 0 78) <br /> 78 pcf(KA=0.25) 85 pcf(KAE=0.36) <br /> I (Below El. -12 ft) Below El.-37ft=78 pcf <br /> (KA=0.25) <br /> I <br /> I <br /> 1 <br /> I <br /> I <br /> Final Geotechnical Report-3-Acre Park.docx 22 HWA GeoSciences Inc. <br />