75B - PH 1501 W MACARTHUR BLVD - Laserfiche WebLink

Home Browse Search

Responses to Environmental Checklist For CEQA Compliance VI. Geology and Soils A-1. Rupture of a known earthquake fault, as delineated on the most recent Alquist-Priolo earthquake Fault Zoning Map issued by the State geologist for the area or based on other substantial evidence of a known fault? No Impact According to the City's General Plan Land Use Element EIR, the project site is not located within a current Alquist-Priolo Earthquake Fault Zone. Therefore, the potential for surface rupture due to faulting occurring beneath the site during the design life of the proposed project would be considered low. A-2. Strong Seismic Ground shaking? Less Than Significant Impact The project site is situated within a highly active seismic region of Southern California. A total of 38 active faults have been identified within an approximate 60-mile radius of the project site. The Newport/Inglewood Fault located approximately 13 miles south from the City of Santa Ana is considered to be one of the most dominant faults in regard to potential seismic shaking impacts. The project site could potentially be subject to a maximum credible horizontal ground acceleration of 0.30g from a magnitude 6.9 earthquake along the Newport/Inglewood fault zone. A seismic event of this scale could potentially result in significant damage to the project site. However, the risks at the project site are similar to many other areas in the Southern California region. To minimize potential seismic shaking impacts, the proposed project would be subject to Seismic Safety Standards of the California Standards Building Code. Compliance with the Code would reduce potential impacts associated with seismic shaking activity to a level that would be less than significant. A-3. Seismic-related ground failure, including liquefaction? Less Than Significant Impact Soil liquefaction occurs when loose soil deposits below the water table are subject to large ground accelerations generated from seismic events. According to the City's General Plan Land Use Element EIR, the project site is located in an area that is characterized with high-very high liquefaction hazard potential. To minimize potential liquefaction impacts, the proposed project would be subject to Seismic Shaking Standards of the California Standards Building Code. Compliance with the Code would reduce potential liquefaction impacts to a level considered less than significant. A-4. Landslides No Impact The project site is flat without any topographical relief. According to the City's General Plan, there are no landslide planes on the project site. Therefore, implementation of the proposed project would not result in adverse impacts in regards to landslides. B. Would the project result in substantial soil erosion or the loss of topsoil? Less than Significant With Mitigation Incorporated 75~~,~5