Explosives are used every day in very close proximity to manmade structures. For example, blasting for swimming pools next to an existing home, utilities next to roads and buildings, foundations, or a basement for a slab on grade home are typical. It is the level of vibration that creates damage within or to structures and not the distance. Blasting, pile driving, compaction or any other vibration source is reduced or limited the closer to a structure the operation progresses. This is all designed to limit vibration leaving the project site.