Maureen Bayer

Maureen Bayer

Of Counsel

503.802.2115
maureen.bayer@tonkon.com

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Services & Industries

Education

J.D., cum laude, Vermont Law School, 2007

M.St., summa cum laude, Environmental Law, Vermont Law School, 2007

B.A., Hampshire College, 2001

Bar & Court Admissions

Oregon State Bar
State Bar of California
Washington State Bar Association

Overview

Maureen is a seasoned environmental attorney, regulatory specialist, and litigator in Tonkon Torp’s Environmental & Natural Resources Practice Group and Business Department.

Maureen’s practice is focused on representing clients facing environmental issues related to regulatory compliance, site contamination, and business transactions. Clients value Maureen’s deep understanding of complex environmental challenges and her ability to provide creative solutions for the best possible outcome. She is adept at approaching her practice through a combination of science and law. No matter what issue her clients face, Maureen puts their best interests first and provides practical advice and counsel all along the way.

Maureen has significant legal and technical experience remediating contaminated property and managing all stages of environmental litigation. She guides landowners through the appropriate steps when they suspect their property may be contaminated, assists clients with reporting obligations, works with consultants to ensure proper documentation of investigation and cleanup activities, and helps recover costs from responsible parties.

Maureen has represented clients from a variety of industries at some of the largest Superfund sites in the country. She has experience obtaining stormwater, wastewater, and air emissions permits, negotiating settlements and resolving non-compliance issues with regulatory agencies, and transferring permits to new entities following change in ownership.

When buying or selling a piece of potentially contaminated property, understanding environmental risk is key to avoiding major issues down the road. Maureen works with environmental consultants and transactional attorneys to identify and appropriately shift environmental risk so that her clients can close their business transactions with peace of mind.

When not in the office, Maureen can be found skiing in the winter, paddle boarding in the summer, and hiking year-round – often in the company of her two children.

Representative Work
Activities & Memberships

Community Involvement & Activities


Professional Memberships

Multnomah Bar Association

Northwest Environmental Business Council

Oregon Women Lawyers

Awards & Recognition
News & Publications

Maureen Bayer Joins Tonkon Torp Environmental & Natural Resources Group

Tonkon Torp LLP is excited to welcome attorney Maureen Bayer to its Environmental & Natural Resources Practice Group. Bayer is licensed to practice law in Oregon, Washington, and California. Bayer’s practice is focused on representing clients facing environmental issues related to regulatory compliance, site contamination, and business transactions.

U.S. Supreme Court Ruling Will Make it Easier to Comply with NPDES Permits

By Maureen Bayer – On March 4, 2025 the Supreme Court overturned the 9th Circuit to rule in favor of the City of San Francisco in a landmark Clean Water Act case. The EPA authorizes states to issue National Pollutant Discharge Elimination System (NPDES) permits, which allow the discharge of certain pollutants in wastewater to bodies of water under certain conditions.

Navigating Extended Producer Responsibility Laws: What Businesses Need to Know

By Rachel Melissa and Maureen Bayer – In an important development for the sustainability movement, Oregon and Colorado are implementing Extended Producer Responsibility (EPR) laws that shift the responsibility for managing packaging waste to the manufacturer. The overarching goal of these laws is to enhance the diversion of recyclable materials from landfills, ensure responsible recycling, and ease the financial burden on local communities.

D.C. Circuit Court Invalidates NEPA Rules

By Maureen Bayer – A federal court in Washington, D.C. recently ruled that the White House Council on Environmental Quality (CEQ) does not have authority to issue environmental regulations under the National Environmental Policy Act of 1969, commonly known as NEPA. This decision follows the Supreme Court’s recent case overruling long-standing precedent known as the “Chevron rule,” deferring to government agencies in their particular areas of expertise.

Publications & Presentations

“D.C. Circuit Court Invalidates NEPA Rules,” Ear to the Ground Blog, November 2024