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Veco Design Studio <br />June 3, 2024 <br />Project 10112-04 <br />Page 8 <br /> <br />5.2.4 Excavating Conditions <br /> <br />a) Excavation of on-site materials may be accomplished with <br />standard earthmoving or trenching equipment. <br /> <br />b) Dewatering is not anticipated at depths shallower than 25 feet <br />below ground surface. <br /> <br />c) Portions of the demolished structures, if any, should be removed <br />entirely from within the structural areas. Care should be taken not <br />to undermine the foundations to be left in place. <br /> <br />5.2.5 Expansion Potential <br /> <br />Based on laboratory test results, the expansion potential is considered to <br />be low. <br /> <br />5.2.6 Sulphate Content <br /> <br />a) The sulphate exposure of the subgrade soils was determined in the <br />laboratory. <br /> <br />b) Based on test results, the sulphate exposure category is considered <br />to be negligible. <br /> <br />5.2.7 Grading Control <br /> <br />a) All grading and earthwork should be performed under the <br />observation of a Geotechnical Engineer in order to achieve proper <br />subgrade preparation, selection of satisfactory materials, placement <br />and compaction of all structural fill. <br /> <br />b) Sufficient notification prior to stripping and earthwork <br />construction is essential to make certain that the work will be <br />adequately observed and tested. <br /> <br /> 5.2.8 Surface Drainage <br /> <br />In accordance with Section 1804.4, 2022 CBC, the ground adjacent to the <br />foundation should be sloped away at gradient of 5 percent. If the ground <br />adjacent to the residence is covered with impervious material, the area <br />adjacent to the foundations may be sloped away at 2 percent gradient. <br /> <br />5.3 Slab-on-Grade <br /> <br />a) Concrete floor slabs may be founded on the compacted fill.