
Charles J. Dennen
Partner
Overview
Representative Experience
News & Insights

09.17.2025
Client Advisories
USEPA Announces Proposal to End Greenhouse Gas Reporting Program
On September 12, 2025, the United States Environmental Protection Agency (USEPA) formally announced a proposed rule to end the Greenhouse Gas Reporting Program (GHGRP). The GHGRP applies to 47 source categories and covers approximately 8,000 facilities throughout the United States, requiring power plants, refineries, chemical plans, fossil fuel and industrial gas suppliers, and carbon dioxide injection sites to report greenhouse gas emission data on an annual basis.

09.08.2025
Articles
EPA's Proposal to Rescind 2009 Endangerment Finding and the Impact of 'Loper Bright'
The EPA has proposed rescinding its 2009 “endangerment finding,” the foundation for federal greenhouse gas regulations. The agency argues that the Supreme Court’s 2024 decision in Loper Bright v. Raimondo, which overturned the long-standing Chevron doctrine, undermines the legal basis for the finding.

06.02.2025
Articles
An Update on the EPA's Recent Action Regarding PFAS
In the Legal Intelligencer article “An Update on the EPA's Recent Action Regarding PFAS” partner Charles Dennen provides a timely update on the EPA’s ongoing efforts to regulate PFAS under the Trump administration’s second term. Despite a general deregulatory stance in President Trump’s second term, the EPA under Administrator Lee Zeldin has shown continuity with the Biden-era PFAS policies. PFAS—persistent, harmful chemicals often found in water—remain a federal priority. The EPA recently announced 21 initiatives across three pillars: