Andrea Dietrich, Virginia Tech (IMAGE) Virginia Tech Caption Andrea Dietrich, professor of civil and environmental engineering at Virginia Tech, led a team of researchers who were able to pinpoint the concentrations of contaminants in the air that the West Virginia residents detected. Credit Virginia Tech Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.