2677 3%4 N Main Unit#WCC01 - Plan

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Project No. VP-6214-01 Verizon Wireless — Fisher Floral Soil Conditions The underlying soil consists of topsoil, silty sand (SM) with little dark brown in color, moist, medium dense in consistency. Undernea CITY OF SANTA ANA Planning and Building Agency may, lS. Approved FOR PERMIT ISSUANCE PAT' 7rown to e: alluvial material, moist, medium dense to dense in consistency. A more detailed profile of the material encountered is shown on Plate I-1 in Appendix A. Faulting and Seismicity The project site is in the highly seismic Southern California region within the influence of several fault systems that are active or potentially active. An active fault is defined by the State of California as a "sufficiently active and well-defined fault" that has exhibited surface displacement within the Holocene time (about the last 11,700 years). A potentially active fault is defined by the State as a fault with a history of movement within Pleistocene time (between 11,700 and 1.6 million years ago). These active and potentially active faults can produce potentially damaging seismic shaking at the site. It is anticipated that the project site will periodically experience ground acceleration as the result of small to strong magnitude earthquakes. Other active faults without surface expression (blind faults) or other potentially active seismic sources are not currently zoned and may be capable of generating an earthquake. Based on our review of geologic maps for the site and vicinity, no State of California designated Earthquake Fault Zone (Alquist-Priolo) is shown to be located on the site. The potential for direct surface fault rupture is considered unlikely. Faults Close to the Site USGS National Seismic Hazard Maps for Source parameters interactive query has been used to determine the closest fault to the site within 50 miles and has been tabulated on Table — 1 in Appendix B. 3