U.S. EPA has announced that it will be holding four workshops in February and March, 2011, to discuss a number of topics related to its Hydraulic Fracturing Study, including well construction and operation and water resource management. It is currently soliciting subject-matter experts to participate as presenters and provide technical knowledge during the discussions. Applications to serve as an expert will be taken until January 3, 2011, at http://hfworkshop.cadmusweb.com.