Fires in a below-grade areas are unlike any other fire to which we respond. The numerous dangers associated with advancing hoselines into these confined spaces while companies operate on the floors above have been linked to multiple firefighter fatalities, injuries, and RIC deployments over the past few years. Valuable information has been gained from recent scientific studies by UL and NIST. This program will provide an interactive review of these studies to ensure the attendees recognize and embrace the critical importance this new information has had on the preferred suppression methods at below-grade fires.