Photo of David Mandelbaum

David Mandelbaum

David G. Mandelbaum represents clients facing problems under environmental laws. He regularly represents clients in lawsuits and also has helped clients achieve satisfactory outcomes through regulatory negotiation or private transactions. A Fellow of the American College of Environmental Lawyers, David teaches Superfund, and Oil and Gas Law in rotation at the Temple University Beasley School of Law as well as an environmental litigation course at Suffolk (Boston) Law School.

Since United States v. Atlas Minerals, the first multi-generator Superfund contribution case to go to trial in 1993, Mr. Mandelbaum has been engaged in matters involving allocation of costs among responsible parties, especially under the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA).  He has tried large cases and resolved others as lead counsel.  He has written, spoken, and taught extensively on the subject.  More recently he also has been engaged to assist lead counsel from this firm and others:

  • to develop cost allocation methodologies;
  • to craft expert testimony in support of a favored methodology (given a definition of “fairness,” why one methodology better tracks it than another);
  • to develop efficient case management approaches; and to assist private allocation as part of the neutral team.

Concentrations

  • Air, water and waste regulation
  • Superfund and contamination
  • Climate change
  • Oil and gas development
  • Water rights

Recent changes in federal government policies and reduced resources at environmental agencies are reshaping the landscape for environmental lawyers. As agencies struggle with limited capacity and diminished data collection, legal professionals must adapt their strategies to continue effectively advocating for their clients.

Continue Reading Agency Budget Cuts and What Environmental Lawyers Do

When a responsible party agrees to clean up a contaminated site under many programs, the government often demands that it provide financial assurance for the completion of the work. When hazardous substances will remain on the site, the site may require response in perpetuity. Can one specify an amount of financial assurance to secure the forever cleanup? Earlier this spring, the Pennsylvania Commonwealth Court considered that question in a case involving cleanup of a site in Ford City. See PennEnvironment v. Department of Environmental Protection, No. 566 C.D. 2024 (Pa. Commw. Ct. Mar. 11, 2025).

Continue Reading Financial Assurance for Cleanup in Perpetuity

Since January, the new national administration has engaged in a large number of actions addressing scores or hundreds of regulations and programs, including environmental and energy programs. However, environmental lawyers have surely noticed that the federal Superfund program under the Comprehensive Environmental Response, Compensation and Liability Act seems to have escaped direct attention.
Continue Reading Superfund Is Unscathed So Far—What Does That Imply?

Act 2 has been on the books since 1995. UECA was adopted in Pennsylvania at the end of 2007. More than a few UECA covenants have been recorded as parts

Continue Reading No Pa. Case Has Ever Adjudicated a Claim to Enforce an Environmental Covenant Imposed Under ‘Act 2’—Does That Matter?

Montana is among the states with a constitutional provision recognizing a right to environmental quality, in its case to a “clean and healthful environment.” Mont. Const. art. II, § 3. 

Continue Reading Montana Supreme Court Holds that State Constitution Protects Youth Plaintiffs’ Right to Protection from Climate Change