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!�r <br /> .. <br /> f:� <br /> r"� Hart Crowser <br /> ��" J-3446-01 <br /> ;� <br /> a' <br /> ► Use a minimum pavement section of 2 inches of asphalt over <br /> 4 inches of crushed rock as a guidance in light traffc or par]dng <br /> , areas; and <br /> ► Use a minimum pavement section of 3 inches of asphalt over <br /> 6 inches of cnuhed rock as a guidance in heaw truck traffic areas. <br /> Seirmic Consideralionr <br /> An in�iepth seismic study is beyond the scope of the project However, <br /> we can present general seismic informatian and data produced during <br /> an in-depth seismic study at the Homeport site. <br /> S'reneml Seirmic Considerationc <br /> ► The site is ]ocated within UBCs seismic zone III. <br /> ► The site's substrata is best represented by UBCs S: site coefficient, <br /> site factor 1? <br /> ► A peak ground acceleration of O.15g would correspond to a 80 <br /> percent probab�liry of nonexceedence in 50 years. <br /> Lrquejndi�n Consideration,r <br /> Ttie liquefaction potential of a site depends on.the nature of the <br /> earthquake and the in situ physica] properties of the so�. For the <br /> liquefaetion study, a Magiitude 6.5 earthquake with a 0.15 g gound <br /> acceleration was used for analysis. We condude the following: <br /> ► Liquefaction analysis indicates that the potendal far liquefaction is <br /> limited to the shallow, ]oose, s�7ry sands above about elevation zero, <br /> as shown on Figure 3. <br /> ► We anticipate that under the design earthquake vertical settlements <br /> due to liquefaction may occur, although the magutude of the <br /> potential settlemenu cannot be accurately determined. <br /> ► As seen on Figure 3, the thiclrness and gradation of the lique5able <br /> wne varies across the site. This indicates that the most damaging <br /> Page�9, � <br />