David Barnes concentrates his practice on environmental litigation and regulatory consulting, with a particular focus on toxic tort litigation hazardous waste requirements, and occupational health and safety. Mr. Barnes represents clients in both federal and state courts, and before federal and state agencies such as EPA, OSHA, and the California Department of Toxic Substances Control. Mr. Barnes has advised and represented clients on a broad array of environmental matters and has extensive experience with California-specific environmental laws, including Proposition 65 and the California Cleaning Products Right to Know Act. His litigation experience includes arguing a criminal sentencing hearing in the Northern District of California.

Mr. Barnes serves as a Founding Steering Committee Member of the Environmental Law Institute's Emerging Leader Initiative, a group that was formed to connect, support, and foster dialogue amongst the next generation of rising stars in environmental law and policy. He also maintains an active pro bono practice, having represented asylum applicants in immigration matters and assisted the ACLU of Northern California in a matter challenging the resumption of the death penalty in California.

Mr. Barnes is a graduate of Stanford Law School, where he received the John Hart Ely Prize for Outstanding Performance in Mental Health Law and in Alchemy, Law, and Practice. While in law school, Mr. Barnes interned with the Yosemite National Park Legal Office, where he appeared in the Eastern District of California on behalf of the United States Government and litigated a federal criminal trial as lead prosecutor, obtaining a conviction that was ultimately upheld by the Ninth Circuit Court of Appeals.


  • Dozens of clients ranging from food manufacturers to personal care companies concerning allegations that their products require Proposition 65 warnings.
  • Large multinational conglomerate company in negotiations with California Department of Toxic Substances Control concerning groundwater contamination at multiple landfill sites.
  • Multiple retailers in California District Attorney environmental enforcement actions.
  • Large university in negotiations with California Department of Toxic Substances Control concerning California Hazardous Waste Control Law.
  • Large university in advising on compliance with OSHA and Cal/OSHA regulations.
  • Large multinational conglomerate company in Cal/OSHA investigation.
  • Large university in negotiating settlement with the US EPA and California Department of Toxic Substances Control in CERCLA cost recovery action.


Emergency and Disaster: Preparedness, Response, and Recovery
Contributing Author, PATTY’s Industrial Hygiene, Volume 4, Program Management and Specialty Areas of Practice, 7th Edition
EPA Memo Details How Environmental Justice Will Impact Civil Enforcement Actions
Environmental Edge: Climate Change & Regulatory Insights
Creating a Label that Complies with Both SB258 and Prop 65
Household & Commercial Products Association Webinar
Prop 65 Bounty Hunters Barred from Filing Acrylamide Lawsuits Based on First Amendment
California's Proposition 65: A Full Update
Arnold & Porter Webinar


  • JD, Stanford Law School, 2017
  • BA, Kent State University, 2012, summa cum laude
  • California
  • US District Court, Northern District of California
  • US District Court, Eastern District of California
  • US District Court, Central District of California
  • US Court of Appeals for the Ninth Circuit
  • Environmental Law Institute's Emerging Leader Initiative, Founding Steering Committee Member
  • Vice President and Founding Member, Kent State University Bay Area Alumni Association
  • Member, Law Day Planning Committee, Yosemite National Park

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