Water polishing tests (IMAGE) University of California - Riverside Caption Duc Phan, postdoc researcher testing methods of cleaning reclaimed water at the U.S. Salinity Laboratory, based at UCR. Credit Stan Lim/UCR Usage Restrictions None 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.