1927 & 1929 S Hickory St - Plan - Laserfiche WebLink

Home Browse Search

Note: The conclusions and recommendations of this report are based on information as interpreted from our limited subsurface investigation. It is not anticipated but they should be revised accordingly if geotechnical conditions to be exposed during site preparation/ grading and construction significantly differ from our findings and interpretations. In general, a conventional shallow foundation can be used for support of the proposed structure. The following recommendations are considered minimum and may be superseded by more restrictive requirements of the architect, civil/structural engineer, building codes, or governing agencies. Geotechnical Impact on Neighboring Properties Adverse geotechnical impact of the proposed development on the neighboring properties is not anticipated, provided the recommendations outlined in this report are properly implemented. Site Preparation/Grading Over-excavation / remedial removal for the proposed first-floor with slab-on-grade area: To create a relatively uniform new engineered compacted fill layer for the proposed new structural slab-on-grade area, over-excavation and re-compaction of about 3 ft. deep (measured from the existing ground surface) of the existing on-site soils should be performed. The lateral limits of the over-excavation should be minimum equal to depth of removal (3 ft. in this case) beyond the outside perimeter of the proposed new structure. The existing rear yard area where the proposed accessory dwelling unit will be located is currently covered with (exterior) concrete slabs which will be removed to replace with new (interior) slabs-on-grade of the proposed ADU. Other Recommendations: The new fill/backfill soils should be free of organic matter and oversized materials, 4 inches or greater in diameter, placed in near-horizontal loose lifts not to exceed eight inches in thickness, and moisture conditioned to slightly over optimum moisture content prior to compaction. Imported soils, if any, should have a very low expansion potential and should be geotechnically observed/tested and accepted by the geotechnical consultant prior to using at the site. In general, grading at the site should be performed in accordance with the requirements of the City and under the geotechnical observation and testing of the project geotechnical consultant. The compaction criterion for fill and backfill materials is a minimum of 90% of the maximum density determined in accordance with ASTM Test Method D1557. 1927 & 1929 S Hickory St2/12/2025