Laserfiche WebLink
<br /> SCE Santa Ana <br /> October 25,2019 <br />Project No. 3.31634 <br /> Page 2 <br /> <br /> <br />The proposed improvements will include excavations for the foundation areas, utility <br />improvement, and paving. The structures are expected to sit at or near existing grades. <br />Foundations will likely include shallow conventional pad and continuous perimeter <br />footings for the Logistics Building Neither subterranean/basement levels or retaining <br />walls are not anticipated. SGSI should review foundation plans once complete to assure <br />conformance with the design recommendations in this report. <br /> <br />3. SITE DESCRIPTION <br /> <br />The improvement areas are to be located near the center of the SCE Santa Ana substation <br />which is located at 1241 S. Grand Avenue Boulevard, approximately 0.17 mi southeast of <br />the intersection of E. McFadden Avenue and S. Grand Avenue in Santa Ana, California <br />(Figures 1 and 2). The topography is flat, and the ground surface elevation is <br />approximately 100’ MSL. The improvements areas are paved and presently used for <br />parking and equipment storage. Map coordinates are 33.7326; -117.8484. <br /> <br />4. GEOLOGIC AND GEOTECHNICAL SITE CONSTRAINTS <br /> <br />Geotechnical constraints to development include the potential for strong ground shaking <br />from an earthquakes along nearby regional faults. <br /> <br />5. REGIONAL GEOLOGY <br /> <br />The subject site is located along the southern margin of the Los Angeles Sedimentary Basin <br />within the Peninsular Ranges Geomorphic Province. The site is underlain at depth by <br />alluvial sediments mapped as young (Holocene) alluvial fan deposits which include <br />unconsolidated to moderately consolidated silt, sand, and cobbly sands (Morton, D.M, and <br />F.K. Miller, 2006). <br /> <br />6. SUBSURFACE CONDITIONS <br /> <br />An onsite subsurface investigation was performed in September 2019 to evaluate the <br />general engineering characteristics of the site soils. The investigation consisted of two <br />shallow augers to 10 feet in depth, and two Cone Penetration Tests (CPT) performed by <br />Kehoe Testing, Inc. under subcontract with SGSI. The CPT probe was pushed to 50-foot <br />depths at each test location in general accordance with the current ASTM standards (ASTM <br />D5778). The CPT equipment consists of a cone penetrometer assembly mounted <br />47 of 100 <br />1327 S Grand Ave <br />12/12/2024