Sampling (IMAGE) Penn State Caption The volunteers will be provided with test kits, instructed how to use them and assigned a coordinate on the Susquehanna River to sample surface water for endocrine-disrupting compounds this spring. Credit US Geological Survey Usage Restrictions Non commercial use 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.