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Lutzky Associates Development. LP - Geolechnical Investigation <br />MACTEC Project 4953-03-2631 <br />September 18.2003 <br />Settlement <br />The estimated settlements of the proposed Data Center, supported on isolated or continuous spread <br />footings in the manner recommended, is on the order of 1 !/2 inches or less. Differential settlements <br />between adjacent isolated footings is expected to be on the order of 3/ inch. Differential <br />settlements between adjacent columns supported on a continuous footing is expected to be on the <br />order of 'A inch. <br />In addition to the static settlements discussed above, the structure should be designed to <br />accommodate liquefaction-induced settlements on the order of Z to % inch, Differential <br />liquefaction-induced settlements is not expected to exceed 92 inch in 200 feet. <br />Lateral Resistance <br />Lateral loads can be resisted by soil friction and by the passive resistance of the soils. A <br />coefficient of friction of 0.4 can be used between the footings and the floor slab and the supporting <br />soils. The passive resistance of the soils can be assumed to be equal to the pressure developed by <br />a fiuid with a density of 250 pounds per cubic foot. A one-third increase in the passive value can <br />be used for wind or seismic loads. The frictional resistance and the passive resistance of the soils <br />can be combined without reduction in determining the total lateral resistance. <br />6.4 SEISMIC COEFFICIENT AND SEISMIC ZONATION <br />The site coefficient, S, can be determined as established in the Earthquake Regulations under <br />Chapter 16 of the California Building Code, 2001 edition, for seismic design of the proposed <br />buildings. Based on a review of the local soil and geologic conditions, the site may be classified <br />Ws,Soil-Profile Type SD as specified in th;*ab. The site is located within CBC Seismic Zone 4. <br />The site is near the Newport-Inglewood Fault, which has been determined to be *i@f:-13· seisinic <br />seWEE 10*Mines' an'1g*(crecently renamed as the Cali fornia <br />Geological Survey). According to Map N-34 in the 1998 publication from the International <br />Conference of Building Officials entitled "Maps of Known Active Fault Near-Source Zones in <br />Cali fornia and Adjacent Portions of Nevada," the proposed Data Center is located at a distance of <br />11.9 kilometers from the Newport-Inglewood Fault. At this distance for a seismic source type B, <br />21