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Lauren Hammond

Lauren Hammond is an environmental law attorney with nearly a decade of experience managing and enforcing complex regulatory matters under federal and state laws. As a former Senior Clean Air Act attorney for the U.S. Environmental Protection Agency, Lauren counseled, litigated, and negotiated high profile cases under the Clean Air Act, Clean Water Act, and Resource Conservation and Recovery Act.

Lauren has deep experience enforcing and addressing compliance matters with the oil and gas industry across the Mountain West, and on a national scale developing and leading the EPA’s National Enforcement and Compliance Initiative to mitigate air impacts from oil and gas.

Additionally, Lauren advised on numerous New Source Performance Standards for the oil and gas sector and other rulemakings under the Clean Air Act.

Lauren’s government experience also involved work with municipalities and construction companies on water quality issues, air quality issues related to diesel engine defeat device investigations, oil spill cleanup and spill prevention with gasoline distributors, waste cleanup related to oil wastewater disposal facilities, and municipal landfill air quality investigations. Lauren has led more than two dozen enforcement actions and investigations and draws from this breadth of experience to provide effective counsel on a diversity of environmental issues.

On Sept. 5, 2025, the D.C. Circuit reversed EPA’s 2023 rule rescinding the “startup, shutdown and malfunction” (SSM) affirmative defense under the Title V permitting program. The decision carries implications for Title V programs nationwide and for stationary source regulations more broadly.
Continue Reading DC Circuit Reinstates Title V Emergency Affirmative Defense

On Sept. 4, 2025, EPA released its Semiannual Regulatory Agenda, signaling that the Agency is expected to continue to focus its deregulatory efforts on rules and regulations under the CAA in furtherance of this administration’s policy to increase domestic energy production and supply by easing rules on producers

Continue Reading Recent Federal Developments May Undercut the Clean Air Act

On Aug. 1, 2025, the U.S. Environmental Protection Agency (EPA) initiated a major climate policy shift by proposing to rescind its 2009 Endangerment Finding, which has been the basis of many regulatory efforts to reduce greenhouse gas emissions from both mobile and stationary sources.
Continue Reading A Turning Point for Greenhouse Gas Emissions Regulation: EPA Seeks to Repeal its Endangerment Finding