David L. Wallis


David’s practice focuses primarily on environmental remediation, enforcement, and litigation and regulatory counseling.   David represents clients on complex environmental remediation sites, natural resource damage claims, environmental and toxic tort litigation, solid and hazardous waste compliance and permitting and compliance, asbestos abatement, water quality permitting and compliance, underground storage tank corrective actions, and environmental due diligence matters.  During the past year, he has advised clients on remediation sites in 15 states involving soil, groundwater, and sediment cleanup.  He also has conducted over 120 comprehensive environmental compliance audits throughout the United States and internationally over the past 25 years.  He has counseled clients on over 500 business and real estate transactions in 11 different states.

Representative Cases

During the past year, he has worked on the following remediation, litigation and due diligence projects:

  • Represented a former owner and operator of the USS Lead Smelter and Refinery Site in East Chicago, Indiana on various multi-party remedial investigations, removal actions, remedial actions and liability allocation.
  • Acted as lead legal counsel on townsite soil remediation projects in four states involving remediation of over 3,000 residential and commercial properties.
  • Represented a client in a multi-million dollar cost recovery and class action lawsuits related to remediation projects in Oklahoma.
  • Negotiated a settlement of natural resource damage claims in associated with a former smelter site in Oklahoma, and actively defending natural resource damage claims in three other states.
  • Provided strategic legal advice to clients in sediment remediation projects in Michigan, New Jersey, Montana and New York.
  • Represented clients on on-going townsite residential remediation projects in Pennsylvania, New Jersey, Kansas, Illinois, and Arizona.
  • Evaluated environmental liabilities and permitting requirements at new mining and manufacturing projects in Arizona, Nevada and Utah.
  • Conducted environmental due diligence at commercial sites in Arizona, California, Colorado, Utah and Washington.

Representative Experience

  • Conducting over 120 comprehensive environmental compliance audits in 30 states, Brazil, Canada and Venezuela during the past eight years.
  • Representing clients on over 250 Real Estate Environmental Site Assessments.
  • Participating in the development of environmental legislation and regulations in four states and on the federal level.  From 1995-2000, Mr. Wallis was the primary author of the Arizona Solid Waste Statute and amendments to Arizona’s Hazardous Waste, Special Waste, Used Oil and Waste Tire Statutes.
  • Representing clients in over 18 cost recovery actions under Superfund, solid waste and underground storage tank laws.
  • Successfully obtaining government agency closure of contaminated sites in Arizona, California, New Mexico, Texas and Washington.
  • Serving as Newsletter Editor (1994-96) and Executive Council Member (1996-2001) of the Environmental and Natural Resources Law Section of the State Bar of Arizona; Chairman of the Arizona Chamber of Commerce Solid and Hazardous Waste Subcommittee (1997-present); Chairman of the Arizona Solid Waste Coalition (1995-present); member, Maricopa Association of Governments Solid Waste Advisory Committee (1998-present); and Visiting Instructor on environmental law at Arizona State University (1989-present).

Bar & Court Admissions

  • Arizona, 1988
  • Utah, 2001
  • U.S. District Court, District of Arizona, 1988
  • U.S. District Court, District of Utah, 2001

Associations & Memberships

  • State Bar of Arizona, Member
  • Arizona State University, Adjunct Faculty, 1989-Present
  • Arizona Solid Waste Coalition, Chair, 1995-Present
  • State Bar of Arizona, Environmental and Natural Resources Law Section, Executive Council, 1996-2000
  • State Bar of Arizona, Environmental and Natural Resources Law Section, Editor, 1994-1996
  • Environmental Auditing Roundtable, Member, 1995-2000
  • George Wythe College, Adjunct Faculty, 2000-2006
  • Arizona Chamber of Commerce, Solid and Hazardous Waste Subcommittee, Chair, 1997-2011
  • Maricopa County Association of Governments, Solid Waste Advisory Committee, Member, 1998-2002
  • Boy Scouts of America, Member
  • The Church of Jesus Christ of Latter-Day Saints, Member

Honors & Awards

  • AV Preeminent Peer Review Rating, Martindale-Hubbell
  • The Best Lawyers in America®, Environmental Law, 2009-2020
  • Chambers USA®, 2019
  • BTI Client Service All-Star, BTI Consulting Group, 2013
  • Arizona's Finest Lawyers, 2011
  • "The International Who's Who of Environment Lawyers", 2011