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625 Cypress Avenue Geotechnical Investigation Project No. W1895-88-01 - 22 - April 23, 2024 spread footings may be designed for an allowable bearing capacity of 2,500 pounds per square foot (psf). Continuous footings should be a minimum of 12 inches in width, 24 inches in depth below the lowest adjacent grade, and 12 inches into the recommended bearing materials. Isolated spread foundations should be a minimum of 24 inches in width, 24 inches in depth below the lowest adjacent grade, and 12 inches into the recommended bearing materials. The maximum allowable soil bearing pressure should be limited to 2,500 psf to reduce induced settlements to less than ½ inch. 7.6.6 Based on seismic considerations, the proposed improvements should be designed for a combined static and seismically-induced differential settlement of ¾ inch over a distance of 30 feet. 7.6.7 Once the design and foundation loading configurations for the proposed structures proceeds to a more finalized plan, the estimated settlements presented in this report should be reviewed and revised, if necessary. If the final foundation loading configurations are greater than the assumed loading conditions, the potential for settlement should be reevaluated by this office. 7.6.8 The allowable bearing pressures may be increased by one-third for transient loads due to wind or seismic forces. 7.6.9 Continuous footings should be reinforced with a minimum of four No. 4 steel reinforcing bars, two placed near the top of the footing and two near the bottom. The reinforcement for isolated spread footings should be designed by the project structural engineer. 7.6.10 The above foundation dimensions and minimum reinforcement recommendations are based on soil conditions and building code requirements only, and are not intended to be used in lieu of those required for structural purposes. 7.6.11 Due to the expansive potential of the anticipated subgrade soils, the moisture content of the slab subgrade should be maintained at approximately 2 percent above optimum moisture content at the time of concrete placement and should sprinkled as necessary to maintain a moist condition. Furthermore, consideration should be given to doweling slabs into adjacent curbs and foundations to minimize movements and offsets which could lead to a potential tripping hazard. 7.6.12 Foundation excavations should be observed and approved in writing by the Geotechnical Engineer (a representative of Geocon West, Inc.), prior to the placement of reinforcing steel