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City of Santa Ana Job No: 01-3058-002-01-00 <br />September 25, 1992 Log No: 2-2662 <br />Page 8 <br />B.A., 1973).Peak acceleration is not, <br />however, always representative of the <br />accelerations for which structures are <br />actually designed (Ploessel, M.R., and <br />Slosson, J.E., 1974).Repeatable high <br />ground acceleration from a 6.9 magnitude <br />earthquake on the Newport-Inglewood Fault <br />Zone is estimated to be on the order of <br />0.23g. <br />C.Estimated seismic parameters for other <br />major, regionally active and potentially <br />active faults are summarized on Table 1, <br />Seismicity for Major Faults. <br />6.GROUNDWATER <br />Groundwater was not encountered during our field <br />investigation.