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Lynn Phan

Counsel | She/Her/Hers
Counsel | She/Her/Hers
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Areas of Focus

Overview

Lynn T. Phan litigates and counsels clients on complex issues arising under the range of federal environmental statutes. In addition to helping clients navigate the administrative rulemaking process, her practice includes advising clients on complex compliance issues, defending against enforcement actions, and litigating agency rulemakings.

Lynn has experience litigating and counseling clients on challenges arising under the Administrative Procedure Act and numerous major federal environmental statutes, including the Clean Air Act, Clean Water Act, Comprehensive Environmental Response Compensation and Liability Act, National Environmental Policy Act, Federal Insecticide Fungicide and Rodenticide Act, Toxic Substances Chemical Act, and the Endangered Species Act.

Prior to joining Crowell & Moring, Lynn was a judicial extern for the Hon. Vanessa D. Gilmore and the Hon. Dena H. Palermo of the U.S. District Court for the Southern District of Texas. While in law school, Lynn was an executive editor of the Georgetown Environmental Law Review, a member of the Law Center’s Moot Court team, and a student attorney for the Environmental Law and Justice Clinic.

Career & Education

    • University of Texas at Austin, B.A., with high honors, 2016
    • Georgetown University Law Center, J.D., cum laude, 2020
      Executive Editor, Georgetown Environmental Law Review
    • University of Texas at Austin, B.A., with high honors, 2016
    • Georgetown University Law Center, J.D., cum laude, 2020
      Executive Editor, Georgetown Environmental Law Review

    • District of Columbia
    • U.S. Court of Appeals for the Ninth Circuit
    • U.S. Court of Appeals for the Tenth Circuit
    • U.S. Court of Appeals for the District of Columbia Circuit
    • U.S. District Court for the District of Columbia
    • District of Columbia
    • U.S. Court of Appeals for the Ninth Circuit
    • U.S. Court of Appeals for the Tenth Circuit
    • U.S. Court of Appeals for the District of Columbia Circuit
    • U.S. District Court for the District of Columbia

Lynn's Insights

Client Alert | 5 min read | 09.23.26

Fifth Circuit Vacates EPA's Methylene Chloride Rule: A Landmark Decision Reshaping TSCA Section 6

On September 15, 2026, the U.S. Court of Appeals for the Fifth Circuit issued a significant decision in East Fork Enterprises, Inc. v. EPA, vacating EPA’s 2024 methylene chloride risk management rule and the underlying revised unreasonable-risk determination under Section 6 of the Toxic Substances Control Act (TSCA). The court granted the industry petitioners’ challenge, denied Sierra Club’s petition, and remanded the matter to EPA....

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Representative Matters

  • Representing agricultural producer in EPA and DOJ enforcement actions arising under the CWA and CAA.
  • Representing crop protection companies and national trade associations in litigation challenging pesticide registrations under FIFRA and the ESA in federal district and appellate courts.
  • Serving as environmental counsel to several companies across multiple CERCLA sites, including in allocation mediation proceedings and settlement negotiations.
  • Representing national trade associations in litigation challenging EPA rulemaking under TSCA.
  • Resolving claims by the DOE’s Office of Enforcement against manufacturing clients alleging violations of energy conservation standards under the Energy Policy Conservation Act.
  • Preparing amicus briefs for the Supreme Court on behalf of trade associations regarding EPA’s authority to regulate greenhouse gases under the CAA.

Lynn's Insights

Client Alert | 5 min read | 09.23.26

Fifth Circuit Vacates EPA's Methylene Chloride Rule: A Landmark Decision Reshaping TSCA Section 6

On September 15, 2026, the U.S. Court of Appeals for the Fifth Circuit issued a significant decision in East Fork Enterprises, Inc. v. EPA, vacating EPA’s 2024 methylene chloride risk management rule and the underlying revised unreasonable-risk determination under Section 6 of the Toxic Substances Control Act (TSCA). The court granted the industry petitioners’ challenge, denied Sierra Club’s petition, and remanded the matter to EPA....

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Insights

Client Alert | 5 min read | 09.23.26

Fifth Circuit Vacates EPA's Methylene Chloride Rule: A Landmark Decision Reshaping TSCA Section 6

Client Alert | 6 min read | 06.26.26

Supreme Court Holds FIFRA Preempts State Failure-to-Warn Claims Challenging EPA-Approved Pesticide Labels

Speaking Engagement | 05.28.26

“Pesticide Litigation Update,” Pesticide Data Compensation and Protection Workshop, Cary, NC.

Client Alert | 5 min read | 05.19.26

DOJ Continues Attempt to Block State-Court Climate Suits with Minnesota Complaint

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Practices

Industries

Lynn's Insights

Client Alert | 5 min read | 09.23.26

Fifth Circuit Vacates EPA's Methylene Chloride Rule: A Landmark Decision Reshaping TSCA Section 6

On September 15, 2026, the U.S. Court of Appeals for the Fifth Circuit issued a significant decision in East Fork Enterprises, Inc. v. EPA, vacating EPA’s 2024 methylene chloride risk management rule and the underlying revised unreasonable-risk determination under Section 6 of the Toxic Substances Control Act (TSCA). The court granted the industry petitioners’ challenge, denied Sierra Club’s petition, and remanded the matter to EPA....

View All Insights