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April 16, 2025 Project <br />Page 2 <br />2.0 Site Description <br />The subject site is located within the 900 block and east side of S. Harmon <br />Kent Avenue to the south, in the City of Santa Ana, as shown in Figure <br />CITY OF SANTA ANA <br />Planning and Building Agency <br />Number 25129-25 <br />Approved <br />FOR PERMIT ISSUANCE <br />rat��et�t oUiared by <br />�: <br />. The generally <br />rectangular shaped parcel is elongated in an east to west direction with topography of the <br />relatively level site descending gradually towards the roadways. The site is currently occupied <br />by a one-story, single-family residence an attached garage and associated hardscape and <br />landscaping as shown in Figure 1. <br />3.0 Site Exploration <br />The field investigation consisted of the placement of three (3) subsurface exploratory borings by <br />hand operated auger to depths ranging between 10 and 12 feet below current ground <br />elevations. The explorations were visually classified and logged by a field engineer with <br />location of the subsurface explorations shown in Figure 1. The exploratory borings revealed the <br />existing earth materials to consist of fill and natural soil. Detailed descriptions of the subsurface <br />conditions are listed on the boring logs in Appendix A. It should be noted that the transition from <br />one soil type to another as shown on the borings logs is approximate and may in fact be a <br />gradual transition. The soils encountered are described as follows: <br />Fill: A fill soil classified as a brown, fine to medium grained, silty SAND with occasional <br />gravel was encountered across the site to a depth of 1 to 1'/2 feet below ground surface. <br />The fill was noted to be loose and damp. <br />Natural: An undisturbed native soil classified as a greyish brown, fine to medium grained, <br />silty SAND was encountered beneath the fill soils. The native soil was observed to be <br />medium dense and damp to saturated with depth. <br />Groundwater: Groundwater was encountered at depths of 9 feet below existing ground <br />surface in exploratory boring B-1. Historic high groundwater in the vicinity has been <br />recorded near 5 feet, as shown on the Seismic Hazard Zone Report for the Newport <br />Beach 7.5- Minute Quadrangle (Figure 3). Caving occurred at depths of 11 to 12 feet due <br />to the shallow groundwater conditions. <br />NorCal Engineering <br />