Trading Allowances for Stormwater Control: Hydrology and Opportunity Costs Hale W. Thurston Michael A. Taylor William D. Shuster US EPA Office of Research and Development National Risk Management Research Laboratory Sustainable Technologies Division Sustainable Environments Branch 26 W. Martin Luther King Drive Cincinnati, Ohio 45268 Copyright ASCE 2004 World Water Congress 2004 Downloaded 11 May 2005 to 192.58.150.41. Redistribution subject to ASCE license or copyright, see http://www.ascelibrary.org/