Thomas D. Gildersleeve


Taylor Porter Partner Tommy Gildersleeve has a broad-based environmental practice that makes him particularly well-suited to represent and advise clients with complex, multi-faceted environmental issues.

His practice involves all aspects of environmental law ranging from permitting and compliance counseling to litigation of toxic tort and other environmental claims.

Tommy has successfully represented clients in administrative proceedings before the Environmental Protection Agency, the Louisiana Department of Environmental Quality, and the Texas Commission on Environmental Quality as well as in matters before various federal and state courts. Tommy also represents clients in administrative matters before the Louisiana Public Service Commission.

Tommy obtained his Juris Doctor degree from Louisiana State University in 2002 where he was a member of the Louisiana Law Review. Prior to attending law school, Tommy obtained a Bachelor of Science degree in Chemical Engineering from Louisiana State University and worked as a process engineer overseeing the day-to-day operation of polyethylene and polypropylene chemical plants.

He is admitted to practice before federal courts in the Western, Middle, and Eastern Districts of Louisiana and is also admitted to practice before all Louisiana and Texas state courts. He is a member of the Louisiana and Texas State Bar Associations, the Defense Research Institute (Toxic Torts and Environmental Law Section), the Louisiana Association of Defense Counsel, and the Air and Waste Management Association. 

Representative Experience:

  • Led permitting of grassroots carbon recycling facility and guided facility through resolution of Subpart FF compliance issues and implementation of Subpart FF requirements; obtained beneficial use permit avoiding need for more costly and burdensome RCRA permit
  • Negotiated settlement of CERCLA response costs among PRPs, DOJ, EPA, TCEQ, and insurers at Texas site requiring extensive remediation, which resulted in large majority of cleanup costs being borne by insurers and other PRPs 
  • Favorably resolved numerous compliance orders and other enforcement actions taken by state and federal resource agencies through negotiation as well as through administrative hearing process
  • Directed preparation for site visits from state and federal regulators
  • Regularly advise clients regarding compliance with state and federal regulations affecting air, water, and waste
  • Negotiated settlement with Corps of Engineers and DOJ that avoided civil and criminal prosecution of developers alleged to have filled wetlands in violation of CWA
  • Performed comprehensive environmental due diligence evaluations in support of mergers and acquisitions, divestitures, and debt offerings and advised clients regarding structuring of transactions to equitably allocate known and potential environmental liabilities and risks
  • Defeated class certification in toxic tort suit alleging personal injuries to over 16,000 plaintiffs arising out of a chemical release, resulting in nominal settlement
  • Obtained summary judgment in favor of shipbuilding facility against insurer for costs incurred to remediate environmental contamination
  • Successfully defended developer against claims that major residential development was prohibited by existing zoning and servitudes burdening property sought to be developed
  • Obtained new trial for municipality overturning verdict that awarded substantial personal injury damages to residents living in close proximity to sewer treatment plant operated by municipality; plaintiffs’ claims ultimately dismissed on appeal
  • Member of trial team that obtained favorable verdict for refinery owner in CERCLA case involving extensive soil and groundwater contamination arising out of historic operations at petrochemical facilities
  • Key member of team that obtained LPSC approval for $3.4 billion acquisition of electric utility by private equity group

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