John Cochran on Site (IMAGE) DOE/Sandia National Laboratories Caption Sandia environmental scientist John Cochran demonstrates the pump used to extract groundwater samples from 150 meter deep monitoring wells at Sandia. (Photo by Michael Padilla). Credit Sandia National Laboratories Usage Restrictions Use for stories covering this Sandia project only. 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.