Acceptable separation distance
Acceptable separation distance (ASD)means the distance beyond which the explosion or combustion of a hazard is not likely to cause structures or individuals to be subjected to blast overpressure or thermal radiation flux levels in excess of the safety standards in 51.203. The ASD is determined by applying the safety standards established by this subpart C to the guidance set forth in HUD Guidebook, Siting of HUD-Assisted Projects Near Hazardous Facilities.