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Mater Dei High School October 20, 2023 Proposed Dance Studio, Santa Ana, California Project No. 3204.I 3204-I-01R (10/23) 3 3.0 SITE CONDITIONS 3.1 SURFACE CONDITIONS The location of the proposed studio is currently occupied by asphalt concrete pavements within the school. The area was occupied by a previous building that appears to have been demolished sometime between 2006 and 2007. The school is bounded by West Edinger Street on the north, residential homes and Baker Street on the east, residential homes on the south, and South Bristol Street the west. Within the school, the dance studio is bounded by the existing gymnasium on the north, a pool on the east, small buildings and a baseball field on the south, and a parking lot on the west. The ground surface elevation at the site is relatively flat with elevations ranging from +56 to +59 feet. 3.2 SUBSURFACE SOIL CONDITIONS Our field investigation disclosed a subsurface profile consisting of undocumented fills soils overlying natural soils. Detailed descriptions of the conditions encountered are shown on the Logs Borings in Appendix. Fills were encountered in the boring to depths of approximately 2 to 2½ feet below existing grades. The fills consisted of clays and silty clays at our boring locations. Documentation regarding the placement and compaction of the fill soils was not provided. The underlying natural soils consisted of sands, silts, clays, and their mixtures. In general, the sandy soils are loose to medium dense while the silty and clayey soils are soft to stiff. The natural soils generally exhibit low to moderate strength and moderate compressibility. The soils in the upper 5 feet of the soil profile have medium expansion potential. 3.3 GROUNDWATER AND CAVING Groundwater was encountered at a depth of approximately 9 feet in our borings. Historical groundwater has been reported by the State at a depth as shallow as 5 feet below existing grades (CGS, 1997). Caving was not observed in the hollow-stem auger used for drilling. Caving of the loose granular soils should be expected. 1202 W Edinger Ave10/3/2024