Air-vacuum works by forcing out high-velocity, supersonic air to explode the soil from within for easy vacuuming and quick backfilling. The vacuum excavation system utilizes kinetic energy in a high velocity air stream to penetrate, expand, and break up soil. The loosened chunks of soil and rocks are then removed from the hole with a powerful vacuum and are ready for quick backfilling. This system offers higher performance in most soils, which means greater efficiency and lower cost for you. Air vacuum excavation turns a backbreaking and dangerous job into a fast, simple, safe and cost effective process.