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<br /> <br /> 3 Parsons-1-01 <br /> <br /> <br />4.2 GROUNDWATER CONDITIONS <br />Groundwater was not encountered within our exploratory boring. Based on information from <br />the California Geological Survey (California Division of Mines and Geology, 1997), the <br />historic high ground water level in the site vicinity is at a depth of approximately 5 feet beneath <br />the existing ground surface. <br />Fluctuations of the groundwater level, localized zones of perched water, and soil moisture <br />content should be anticipated during and following the rainy season. Irrigation of landscaped <br />areas on or adjacent to the site can also cause a fluctuation of soil moisture content and local <br />groundwater levels. <br />4.3 SOIL ENGINEERING PROPERTIES <br />Physical tests were performed on the relatively undisturbed samples to characterize the <br />engineering properties of the native soils. Moisture content and dry unit weight determinations <br />were performed on the samples to evaluate the in-situ unit weights of the different materials. <br />Moisture content and dry unit weight results are shown on the boring logs in Appendix A. <br />5.0 STRONG GROUND MOTION POTENTIAL <br />The project site is located in a seismically active area typical of Southern California and likely <br />to be subjected to a strong ground shaking due to earthquakes on nearby faults. <br />5.1 CBC DESIGN PARAMETERS <br />To accommodate effects of ground shaking produced by regional seismic events, seismic <br />design can, at the discretion of the designing Structural Engineer, be performed in accordance <br />with the 2022 edition of the California Building Code (CBC). Table 1, 2022 CBC Seismic <br />Parameters, lists (next) seismic design parameters based on the 2022 CBC methodology, which <br />is based on ASCE/SEI 7-16: