Richard A. Ahrens' practice includes representation of manufacturing and mining clients in toxic tort actions as well as defense of cost recovery and cleanup actions under CERCLA and state law. In the early 1980s, Rich participated in United States v. Bliss—the governmental cleanup action arising from the Times Beach dioxin contamination—and environmental litigation has been a main focus of his practice ever since. Rich counsels transactional clients on the environmental risks in real estate and commercial transactions, negotiates consent decrees and administrative orders for performance of response actions and payment of cleanup costs, and works with clients in arranging the cleanup of properties under state voluntary remediation programs.

Rich regularly appears in appellate courts in Missouri and elsewhere, having appeared in the Supreme Court of Missouri, Eighth Circuit Court of Appeals, and Missouri Court of Appeals. He is a frequent author on issues including environmental law, legal ethics, and appellate practice. Rich is AV® Preeminent™ Peer Review Rated by Martindale-Hubbell.

Practice Areas


  • Saint Louis University School of Law (J.D., magna cum laude, 1975)
    • Saint Louis University Law Journal, student writings editor
    • Order of the Woolsack
  • Boston College (A.B., summa cum laude, 1972)
    • Political Science
    • Phi Beta Kappa

Legal Background

  • Law clerk, Hon. Wm. H. Webster, U.S. Circuit Judge (1976-1977)
  • Staff law clerk, U.S. Court of Appeals, Eighth Circuit (1975-1976)

Professional Affiliations

  • American Bar Association, Litigation Section and Section on Natural Resources and Environmental Law
  • Bar Association of Metropolitan St. Louis


  • U.S. Court of Appeals, Eighth Circuit
  • U.S. District Court, Eastern District of Missouri
  • Supreme Court of Missouri
  • Missouri Bar