1901 & 1919 N Fairview St - Soils Report

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603284-001 1.0 INTRODUCTION 1.1 Site Location and Description The approximately 7.1-acre site is located at 1901 and 1919 North Fairview Street in the City of Santa Ana, California (latitude 33.76184Â° and longitude - 117.90095Â°). The site and immediate vicinity are shown on Figure 1, Site Location Map. The site is currently occupied by vacant buildings, which are to be demolished to accommodate the proposed development. Topographically, the site is generally level with sheet flow drainage over paved surfaces from north to south and into the storm drain system, which empties into the concrete-lined Santa Ana River channel and levee located approximately 200 feet south and east of the site. Riverview Golf Course, located several hundred feet northeast of the 17th Street overcrossing, is located along both sides of the Santa Ana River. The river channel is unlined along this section which allows irrigation water and seasonal runoff to percolate into the subsurface. The surrounding areas consist of residential buildings to the south, east, and west; and a mixed-use commercial building to the north. According to the ALTA Survey prepared by Thienes Engineering, the ground surface at the site ranges from approximately Elevation (El.) +101 feet mean sea level (msl) in the northern portion to El. +99.5 feet msI in the southern portion. The existing northerly building is rectangular in shape, three-stories in height, and has approximately 38,250 square feet of total floor area. This building is reportedly a steel frame structure with wood framed floors and roof supported on shallow spread footings. The existing southerly building is a 42,600-square-foot, single-story concrete tilt- up structure supported on spread footings. 1.2 Purpose and Scope The purpose of this study was to conduct a geotechnical exploration program in general accordance with the California Building Code (CBC). We evaluated geologic/seismic hazards that may impact the site. Site soils and groundwater 4 -1- Leighton SL Rvcd 2019.01.21