Attachment_2_-_Geotechnical_Investigation_Report.pdf

This document is a Geotechnical Engineering Exploration and Soil Field Permeability Testing Report prepared by Cal-Tech Testing, Inc. for GAI Consultants, focused on the Leesburg International Airport New Hangar Complex Roadway and Taxilane project located in Leesburg, Florida. The report details subsurface soil exploration conducted between April 13-14, 2023, which involved drilling ten 10-ft-deep boreholes (B1-B12) along the proposed Veterans Road extension and taxilane alignments, performing Standard Penetration Tests (SPT), and conducting soil field permeability tests.

The investigation revealed a generalized subsurface soil profile consisting primarily of SAND strata to explored depths of 10-15 ft, with groundwater encountered at depths varying from 3.5 to 7 ft. Laboratory testing of soil samples included California Bearing Ratio (CBR) tests, which showed CBR values ranging from 7.9 to 30.3 at 100% compaction. The report recommends improvement of the subgrade relative density through the upper 12 inches, potentially using a large vibratory roller, and suggests that after removing organic soils, replacement should be performed with approved fill materials compacted in accordance with FAA guidelines. The findings will inform the design and construction of roadways and taxilanes associated with the new airport hangar complex.