Jul 28 Environment Underground Storage Tanks Pose Groundwater Threat Some pollution you can smell or see: the fumes from a diesel-powered truck, a slick of oil on the Ohio River. Some sources are less noticeable but just as insidious. As WFPL’s Kristin Espeland reports, underground petroleum storage tanks are getting renewed attention with an influx of federal stimulus funds. By Kristin Espeland Jul 28 Environment Underground Storage Tanks Pose Groundwater Threat Kristin Espeland