Sometimes the biggest threats come from the things you cannot see. And, no, we are not talking about ghosts, although that’s what’s keeping Secret up at night. Today’s show takes us underground to talk about an often overlooked danger lurking just beneath your feet: oil tanks. GeoScan Subsurface Surveys’ Joseph Salazar joins Adam & Matt this week to chart why oil tanks are problematic, tank timelines, clues that a house was on oil, why your uncle’s metal detector is not enough, and some horror stories too. Trust us! You’ll tank us later.