Soils_Report_v1.pdf

This document is a Geotechnical Evaluation report prepared by Ninyo & Moore, a geotechnical and environmental sciences consulting firm, for the City of Tucson's Public Safety Training Academy. The report focuses on a proposed Firing Range & Virtual Training Facility project located in Tucson, Arizona. The scope of work included conducting a subsurface exploration by drilling five exploratory borings to a depth of 20 feet, collecting soil samples, performing laboratory testing, and evaluating geologic conditions and potential hazards. The investigation was completed on November 8, 2022, with the report dated November 30, 2022.

The report provides comprehensive geotechnical recommendations for design and construction, including soil classification, compaction requirements, foundation design, seismic considerations, and potential construction challenges. Laboratory tests revealed the site soils are primarily composed of silty gravel and sandy gravel with varying densities, and the area is characterized as part of the Sonoran Desert Section with alluvial deposits. Corrosivity tests indicated the on-site materials may be corrosive to ferrous metals, and the groundwater table was estimated to be approximately 270 feet below ground surface. The evaluation concluded that the proposed construction is geotechnically feasible, provided the recommendations in the report are incorporated into the project design.