Rolf Halden and team (IMAGE) Arizona State University Caption ASU Researcher Rolf Halden (left) and his research team prepare to deploy the In Situ Sampler or IS2 -- a device capable of sensitive monitoring of groundwater, at lower cost and with less environmental damage. Credit The Biodesign Institute at Arizona State University 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.