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<br />EARTH STRATA GEOTECHNICAL SERVICES 1 March 30, 2023 Project Number 234812-10A <br />INTRODUCTION Earth Strata Geotechnical Services is pleased to present our preliminary geotechnical interpretive report for the proposed development. The purpose of this study was to evaluate the nature, distribution, engineering properties, and geologic strata underlying the site with respect to the proposed development, and then provide preliminary grading and foundation design recommendations based on the plans you provided. The general location of the subject property is indicated on the Vicinity Map, Figure 1. The plans you provided were used as the base map to show geologic conditions within the subject site, see Geotechnical Map, Plate 1. <br />SITE DESCRIPTION <br /> The subject property is located at 2130 East 4th Street in the City of Santa Ana, Orange County, California. The approximate location of the site is shown on the Vicinity Map, Figure 1. The subject property is comprised of a developed parcel of land with an existing office building and parking lot. Topographic relief at the subject property is relatively low with the terrain being generally flat. Elevations at the site range from approximately 138 to 144 feet above mean sea level (msl), for a difference of about ± feet across the entire site. Drainage within the subject property generally flows to the west. The site is currently bordered by commercial development to the east and west, East 4th Street to the north and parking lots to the south. Most of the vegetation on the site consists of landscape areas throughout the subject site. <br />PROPOSED DEVELOPMENT The proposed residential development is expected to consist of concrete, wood or steel framed one- and/or two-story structures utilizing slab on grade construction with associated streets, landscape areas, and utilities. The current development plans include two buildings positioned in the southeastern portion of the site. The plans provided by you were utilized in our exploration and form the base for our Geotechnical Map, Plate 1 <br />2130 E 4th St <br />2/11/2025