Mr. Riordan's practice focuses on environmental issues with an emphasis on solid and hazardous waste, water quality, and wetlands matters. In particular, he has:

• Represented RCRA and Superfund clients in various hazardous waste matters including the development and negotiation of consent agreements and the preparation of permit applications
• Advised sellers and purchasers of real property, as well as environmental consultants, on environmental auditing and liability issues
• Negotiated agreements with the Corps of Engineers and the Environmental Protection Agency for dredge and fill permits and compensatory wetland mitigation.
• Represented industrial clients in various air matters including APEN reporting, the preparation of air emission permit applications, and the development and negotiation of consent agreements
• Assisted lobbyists for the Colorado Association of Commerce and Industry on numerous state legislative initiatives related to solid and hazardous wastes

While at Psomas and Associates, Mr. Riordan attained broad engineering and management experience with an emphasis in: (a) design of public and private improvement projects; (b) preparation of grading and site development plans; and (c) estimation of construction and engineering costs. Mr. Riordan is a licensed Professional Engineer in the states of California and Colorado.

University of Colorado School of Law, Boulder, Colorado
Law Review

Civil Engineering -- Water Resources Planning and Management
Colorado State University, Fort Collins, Colorado

Civil Engineering
California State University, Los Angeles, California

Civil Engineering
Loyola Marymount University, Los Angeles, California

American Bar Association, Environment, Energy, and Resources Section and Law Practice Management
Colorado Bar Association, Real Estate Law Section and Environmental Law Section.
Boulder County Bar Association
American Society of Civil Engineers

Mr. Riordan is admitted to practice law in the State of Colorado, the U.S. District Court for the District of Colorado, and the U.S. Supreme Court.

Iatridis, A.P., Riordan, E.J., Curran, R.W.: "EPA Overfiling after Harmon Industries, Inc. v. Browner," Colorado Lawyer, November 1999, Vol. 28, No. 11, p. 95; reprinted in American Bar Association's Environmental Transactions, Audits, and Brownfields Committee Newsletter, Vol. 2, No. 2, December 1999; and in Compliance Publishers' Colorado Compliance, November 30, 1999, pp. 15-21.

"Key Issues in Wetlands Regulation in Colorado," National Business Institute Seminar, Co-Presenter, August 1995.

"Environmental Law Issues," University of Colorado's Fourteenth Annual Hazardous Materials Symposium, Guest Speaker, December 1993

"Wetlands Regulation," University of Denver Environmental Policy and Management Program, Guest Lecturer, October 1992.

"Financial Assurance Mechanisms for Closure and Post-Closure of Solid Waste Disposal Facilities," Governmental Refuse Collection and Disposal Association Conference, February 1989.

"Closure -- A Checklist for Survival," Waste Management Conference, Focus on the West, June 1987.

"Environmental Law and Risk Management," Hazardous Materials: Emergency Environmental Response Conference, June 1987.

"Federal Protection of Instream Flow Uses," American Society of Civil Engineers Annual Convention, October 1984.

Vranesh, G. and E.J. Riordan. Water for Synfuels Development: Problems in Acquisition and Development, 16 Nat. Res. Law 439 (1983).