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<br /> SCE Santa Ana <br /> October 25,2019 <br />Project No. 3.31634 <br /> Page 11 <br /> <br /> <br />subgrade. The actual depths and lateral extents of grading will be determined by the <br />geotechnical consultant, based on subsurface conditions encountered during grading. <br />Areas to be over-excavated should be accurately staked in the field by the Project <br />Surveyor. <br /> <br />Site grading and footing excavations should be observed by SGSI. Such observations <br />are considered essential to identify field conditions that differ from those anticipated <br />by the investigation, to adjust design to actual field conditions, and to determine that <br />the grading is accomplished in general accordance with the recommendations of this <br />report. Earthwork and grading recommendations which include guidelines for site <br />preparation fill compaction, temporary excavations, and trench backfill are provided <br />in Appendix C. <br /> <br />15.3.1 Construction Considerations <br /> <br />Excavations will be required to construct spread footings, install utilities, and to <br />remove locally weak or unsuitable soils. All excavations that will be deeper than <br />5-feet and will be entered by workers should be shored or sloped for safety in <br />accordance with Occupational Safety and Health Administration (OSHA) <br />standards. Though not encountered during our investigation, groundwater <br />seepage may be encountered in excavations extending 5-feet or greater <br />depending upon the time of year in which the work occurs. Stabilization and <br />drainage measures may need to be performed. <br /> <br />If earthwork is performed during or shortly after wet weather conditions, the <br />moisture content of the onsite soils could be appreciably above optimum. <br />Consequently, subgrade preparation and fill placement may be difficult. <br /> <br />15.4 Foundations <br /> <br />Shallow, spread or continuous footings may be used to support the proposed structure <br />provided they are founded entirely upon properly compacted fill, or competent native <br />deposits. Continuous and isolated column foundations should be sized according to the <br />allowable soil bearing pressures shown in Table II below. The pressures shown on <br />Table II are for dead loads plus long-term live load. <br /> <br /> <br />56 of 100 <br />1327 S Grand Ave <br />12/12/2024