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<br /> <br />ASSOCIATED SOILS ENGINEERING, INC. Project No.: 7160.23 <br />2860 Walnut Avenue, Signal Hill CA 90755 January 23, 2024 <br />Tel: (562) 426 -7990 * Fax: (562) 426 -1842 Page 15 <br />1:1.5 (H:V) for excavations up to 10 feet in depth. The above temporary slope criteria are based <br />on level soils conditions behind temporary slopes with no surcharge loading (structures, traffic) <br />within a lateral distance behind the top of slope equivalent to the slope height. <br /> <br />It is recommended that excavated soils be placed a minimum lateral distance from top of slope <br />equal to the height of slope. A minimum setback distance equivalent to the slope height should <br />be maintained between the top of slope and heavy excavation/grading equipment. Soil <br />conditions should be reviewed by the Geotechnical Consultant as excavation progresses to <br />verify acceptability of temporary slopes. Final temporary cut slope design will be dependent <br />upon the soil conditions encountered, construction procedures and schedule. <br /> <br />b) Temporary Shoring: <br />Temporary shoring will be required for those excavations where temporary sloping as specified <br />above is not feasible. <br /> <br />Temporary cantilever shoring, if used, should be designed to resist an active earth pressure of <br />40 pounds per cubic foot (pcf) equivalent fluid pressure (EFP) for level soil conditions behind <br />shoring. The resultant lateral deflection of shoring and surficial settlement immediately behind <br />shoring are estimated to be on the order of one (1) to one and one half (1 ½) percent of the <br />shored excavation depth. Should this ground deformation be intolerable to the existing <br />structure, ASE should be consulted for more detailed analysis and further recommendations. <br /> <br />The design of shoring should also include an additional lateral pressure equivalent to one-third <br />(1/3) of the surcharge loading of existing structures and anticipated traffic, including delivery <br />and construction equipment, when loading is within a distance from the shoring equal to the <br />depth of excavation. In addition to the above, a minimum uniform lateral pressure of 100 <br />pounds per square foot (psf) in the upper ten (10) feet of shoring should be incorporated in the <br />design when normal traffic is permitted within ten (10) feet of the shoring. <br /> <br />c) Slot Cutting Adjacent to Existing Structure Foundations: <br />Prior to any excavation, the footings of the existing structure should be researched as it could <br />compromise the stability of foundation when excavating site soils immediately next to or below <br />any existing footing foundation. "A-B-C" slot cutting grading procedures may be utilized to <br />accomplish the required overexcavation for areas adjacent to existing building foundation or <br />improvements that might otherwise be undermined by the grading operation on the subject <br />Site. As a general guideline, slot cutting would be necessary for overexcavation located within a