Beveridge & Diamond
Donald J. Patterson, Jr. photo

Donald J. Patterson, Jr.


1350 I Street, N.W.
Suite 700
Washington, DC 20005-3311

  • College of William and Mary (B.A., summa cum laude, Phi Beta Kappa, 1979)
  • University of Michigan (J.D., 1982)
Bar Admissions & Memberships
Bar Admissions & Memberships
  • District of Columbia
  • American Bar Association

Don Patterson graduated from the University of Michigan Law School in 1982, and moved to Washington, D.C. to begin his 35 year career in the private practice of environmental law and environmental litigation. Don has built his practice around the principle that varied experience in a wide range of substantive areas of environmental law and in multiple types of representation allows him to deliver sophisticated, innovative and cost-effective environmental and related legal services to his pharmaceutical, oil and gas, natural resources, retail and other clients. 

Don’s extensive environmental counseling practice enables him to represent his clients effectively in rulemakings and appellate litigation. His environmental litigation, negotiation and enforcement experience allows him to evaluate complex and nuanced environmental issues that arise in environmental due diligence and the drafting of stock and asset purchase agreements. Moreover, his experience with many federal and state environmental programs – Resource Conservation and Recovery Act (RCRA) hazardous and solid waste, state medical and infectious waste, the Clean Water Act (CWA), the Clean Air Act (CAA), Prevention of Significant Deterioration (PSD), New Source Review (NSR), minor source permitting, federal and state reporting, and others – enables him to approach and settle environmental problems—including government and citizen suit enforcement—with a holistic approach that resolves environmental and health claims, economic issues, and toxic tort and reputational concerns.  Facilitated by his broad experience, Don currently serves in an outside general counsel role for the Pharmaceutical Product Stewardship Working Group and the MED-Project, consortiums of pharmaceutical companies formed to respond to and comply with multiple local household unwanted medicine and sharps takeback programs in California, Washington, New York, and Massachusetts.

Professional Highlights

Don is a former member of the Firm’s Management Committee and previous chair of the Firm’s Environmental Practice Group.

Don is AV Peer Review Rated by Martindale-Hubbell, rated by peers and members of the judiciary, and is recognized by Law Business Research in Who’s Who Legal: Environmental 2017-2018.

Representative Matters
Representative Matters

Environmental Enforcement, Negotiation and Litigation

A critical and ongoing part of Don’s representation is his environmental enforcement, negotiation and litigation practice. In recent years, Don has defended clients in the following enforcement matters:

  • Current CAA enforcement case where United States Environmental Protection Agency (EPA) headquarters and EPA Regions 3 and 5 have alleged nonattainment new source review and minor source permitting violations in the natural gas industry;
  • CAA flaring case brought by EPA Region 6 in the oil and gas industry;
  • Emergency Planning and Community Right to Know (EPCRA) and RCRA release/spill case in EPA Region 5 in the oil industry;
  • Multiple EPCRA release and reporting cases in a number of EPA Regions for numerous clients;
  • Clean Water Act (CWA) and RCRA Section 7003 imminent and substantial endangerment case brought by EPA Region 9 in the waste management industry; and
  • RCRA Subtitle I underground storage tanks case in EPA Region 2 in the downstream oil industry.

Don also represents clients in EPA and “state equivalent” Comprehensive Environmental Response Compensation and Liability (CERCLA or “Superfund”) actions for clients in the mineral processing, oil and gas, pharmaceutical, printing and other industries. This representation, in scores of cases across the country,  has ranged from allocation battles to the resolution of complex remedial issues, at sites with hundreds of potentially responsible parties to single party sites.  Don also represents clients in natural resource damages (NRD) cases and in claims against the U.S. government, and has performed a number of internal investigations in response to threatened government environmental enforcement.

Counseling, Rulemaking and Appellate Litigation

Don provides daily counseling on challenges involving hazardous and solid waste and related recycling operations, medical, sharps and infectious waste disposal, water discharges, air emissions, Drug Enforcement Agency compliant disposal of controlled substances, Department of Transportation transport of hazardous materials, and other regulatory issues. He has been heavily involved for many years in counseling mining and mineral processing industry clients with regard to the RCRA regulatory definition of solid waste and the Bevill Amendment.  He also represents clients with regard to a range of RCRA and other rulemakings before EPA.

Don has advised many companies, and successfully negotiated with private parties and states and federal entities, with regard to the full range of regulatory and remediation issues associated with legacy contamination sites and contaminated properties, including waste management, notification, and options for cleanup. He has negotiated “guaranteed fixed price” remediation approaches on brownfields properties.  Additionally, he counsels clients on the pros and cons of “voluntary disclosures” under federal and state programs.

In his appellate litigation practice, Don has represented the National Mining Association (“NMA”) (among other clients) for thirty years. He recently represented the NMA as intervenor-respondent in litigation involving EPA’s 2015 regulatory definition of solid waste, presenting successful oral argument against the environmentalists challenge to EPA’s decision not to expand regulation to 32 existing RCRA regulatory exclusions. American Petroleum Institute v. EPA, No. 09-1038 (D.C.Cir. July 7, 2017). For many years, he has been lead counsel in numerous mining industry regulatory advocacy and administrative litigation challenges, particularly in the RCRA context. See Appalachian Voices v. McCarthy, 989 F.Supp.2d 30 (D.C.D.C.  2013).) (the U.S. District Court for the District of Columbia agreed with NMA and dismissed environmental plaintiffs’ claims that RCRA Section 2002 (b) required review of  Bevill Amendment regulatory provisions and the RCRA “toxicity characteristic” every three years); Association of Battery Recyclers v.U.S. Environemental Protection Agency, 208 F. 3d. 1047 (D.C.Cir. 2000) (D.C. Circuit struck down EPA’s unlawful expansion of its RCRA regulatory definition of solid waste).

Environmental Representation in Mergers and Acquisitions

Don represents clients in multi-billion dollar international deals in the pharmaceutical and natural resources industry, among others, with regard to the four potential environmental elements of major mergers and acquisitions:

  • environmental due diligence, including due diligence on product safety and product import/export components related to environmental and health concerns;
  • negotiation and drafting of environmental representation and warranties and indemnities, and related provisions allocating environmental and related liabilities, in stock and asset purchase agreements and related documents;
  • environmental permit transfers; and
  • post-transfer environmental compliance.

For such representation, Don typically partners with deal counsel, handling the environmental and related issues and functioning as an integral part of the internal and external deal team.