2211 GIBSON PL Geotech Report 2023-04-06

C August 18, 2014 Gibson Bluff L&A Job No. 14-056 Page 11 completely stripped. Permanent fill embankments should be no steeper than 2H:1 V. After completion, the sloping faces of fill embankments should be compacted to a non- yielding state with a hoe-pack. The above recommended temporary and permanent cut and fill slopes are under the assumption that groundwater seepage would not be encountered during construction. If groundwater seepage is encountered, grading work should be immediately halted and the slope stability re-evaluated. The slopes may have to be flattened and other measures taken to stabilize the slopes. Storm runoff should not be allowed to flow uncontrolled over the top of cut and fill slopes. Unpaved permanent cut slopes or fill embankments should be seeded and vegetated as soon as possible for erosion protection and long-term stability, and should be covered with plastic tarps, as required, to provide erosion protection against storm runoff until the vegetation is fully established. Structural Fill Structural fill is the fill that supports structural or traffic load. Structural fill should consist of clean granular soils free of organic and other deleterious substances and with particles not larger than three inches. Structural fill should have a moisture content within one percent of its optimum moisture content at the time of placement. The optimum moisture content is the soil water content that enables the soil to be compacted to the highest dry density for a given compaction effort. Onsite soils meeting the above LIU & ASSOCIATES, INC.