Groundwater Sampling (IMAGE) University of California - Davis Caption UC Davis researchers insert a device that continuously collects water samples underground, providing real-time data on nitrate contaminant movement. Credit Isaya Kisekka, UC Davis Usage Restrictions Use with attribution License Original 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.