Lawyer Image

Mark E. Mercer

1000 Jackson Street
Toledo, OH 43604


Denise Large

Mark has extensive experience in environmental law, litigation, and administrative law. Having worked with businesses in a wide range of industries, he offers clients a unique perspective to their legal needs.

Partnering closely with his clients, Mark brings a strategic approach to his practice and helps clients put their legal questions in context to develop comprehensive and sensible resolutions. He advises clients on various environmental, health, and safety matters, including:

  • Compliance with solid and hazardous waste requirements
  • Underground storage tank laws and regulations
  • Permitting
  • Wetlands
  • Remediation projects

Mark has significant experience in commercial real estate transactions involving environmental issues, and has managed environmental aspects of complex multi-site projects, including general due diligence, team oversight, and the commission, review, and comment on Phase I and Phase II Environmental Site Assessment reports. He also advises clients on mitigating or avoiding environmental risks associated with commercial business and real estate matters, and on contractual agreements relating to oil and gas leases. Mark also represents clients regarding Occupational Safety and Health Administration (OSHA) compliance, zoning, board of elections, and other administrative matters.

In addition, Mark has represented clients in civil litigation, including personal injury and commercial matters, as well as in mechanic’s liens, collections, garnishments, and related litigation. He is admitted to practice before the United States Court of Appeals for the D. C. Circuit and United States District Courts for the Northern and Southern Districts of Ohio.

Representative Matters

  • Defended regulatory enforcement actions and negotiated settlements with Ohio EPA, Bureau of Underground Storage Tank Regulations (BUSTR), Toledo Department of Environmental Services (TDES), and Lucas County Emergency Planning Commission (LCEPC) concerning leaking underground petroleum storage tanks and related environmental matters.
  • Defended commercial tenant, coordinated site closure activities, and negotiated favorable settlement with Ohio EPA concerning a RCRA hazardous waste enforcement matter.

Alternate biographies




  • J.D., The University of Toledo, 2002
  • B.A., The University of Toledo, 1989

Bar and Court Admissions

  • Ohio, 2002
  • United States Court of Appeals District of Columbia
  • United States District Court Northern and Southern Districts of Ohio