Basement Excavation, Backfill, and Final Grading

The contract involves the excavation of a basement area, backfilling to grade using approved materials, and final site grading with compaction verification to ensure proper soil density and stability. All work must comply with engineering specifications and regulatory standards for site preparation and earthwork. The project is situated in a location with a zip code of 95347 and falls under the NAICS code 237310, indicating it is a civil engineering construction activity. This is a subcontract issued by the City and County of San Francisco under the California state framework, with the solicitation posted on June 15, 2026. The work requires careful execution of earthmoving operations, material selection, and compaction testing to meet performance and safety criteria for the finished grade.