• Value Engineering replacement for foamed concrete as lightweight fill

• Redevelopment of existing industrial building required backfilling existing tunnels under slab

• Foundation soils consisted of soft compressible material

• Contractor was able to install UL-FGA without enlisting a specialty subcontractor

• Self-performance allowed contractor to meet project schedule

• Once tunnels were filled with UL-FGA and compacted, a new concrete slab was constructed over the UL-FGA-filled tunnels and adjacent areas