Vanessa Adriance

Vanessa C. Adriance

Senior Associate

Vanessa C. Adriance's primary practice area is devoted to the defense of claims brought under California's Safe Drinking Water and Toxic Enforcement Act of 1986, known as Proposition 65. She has been advising clients in this area for over a decade. She has represented retailer and manufacturer clients in the defense of Proposition 65 claims relating to a diverse array of products, including nutritional supplements, food, personal care products, furniture, and costume jewelry. She has likewise handled Proposition 65 matters implicating many chemicals and groups of chemicals, including lead, acrylamide, furfuryl alcohol, flame retardants, PCBs and phthalates.

She has handled Proposition 65 cases in Los Angeles, San Francisco, Sacramento, and Alameda trial courts, and in the California Court of Appeal. She has extensive experience with the Office of Environmental Health Hazard Assessment, the agency charged with administering Proposition 65, and the California Attorney General's office, on matters relating to Proposition 65.

Ms. Adriance also has extensive experience in advising clients regarding compliance with Proposition 65.

Ms. Adriance has also advised clients on other environmental issues, including matters relating to California's Green Chemistry initiatives and California's Lead in Jewelry laws, as well as the California Energy Commission’s appliance efficiency regulations. Ms. Adriance has substantial trial and appellate experience, and has worked on several complex matters involving environmental issues, consumer protection issues, antitrust issues, contract issues, fraud, and legal malpractice defense from inception through verdict and appeal.

Ms. Adriance has been named a "Rising Star" in litigation by Super Lawyers magazine every year since 2013. She graduated summa cum laude from Tulane University School of Law in 2006, where she served as Managing Editor of the Tulane Law Review and received the Charles Janvier II Award for Production Excellence. She received a Master of Arts Degree from Tulane University in 2003 in English, and a Bachelor of Arts degree from Tulane University in 2002.

Prior to joining the firm, Ms. Adriance practiced in the litigation department of a large international law firm.


  • American Chemistry Council v. Office of Environmental Health Hazard Assessment, Case No., C079078, where in 2013 she was a key member of the team that obtained mandatory preliminary injunction requiring the State of California to remove bisphenol-A ("BPA") from the Proposition 65 list of reproductive toxicants. The mandatory injunction was lifted by the trial court after a hearing on the merits in 2014, but in 2015, the California Court of Appeal issued a writ of supersedeas against the Office of Environmental Health Hazard Assessment, thus keeping the injunction in effect, until a hearing on the merits by the Court of Appeal, which is still pending.
  • American Chemistry Council v. Office of Environmental Health Hazard Assessment, Case No. C079260, appeal of a challenge to the listing of Diisononyl phthalate ("DINP") as a carcinogen under Proposition 65.


California Takes the Lead on Plastic Waste Reduction
Environmental Edge: Climate Change & Regulatory Insights
The First Amendment Halts Proposition 65 Enforcement for Acrylamide in Food and Beverages
Environmental Edge: Climate Change & Regulatory Insights
California's Proposition 65: A Full Update
Arnold & Porter Webinar
ABC Test Retroactivity Remains An Open Issue After Vazquez
Law360 Employment Authority
Whose Problem Is This? Practical Issues in Defense and Indemnity for Retailers
Arnold & Porter Webinar-of-the-Month Club for Retailers


Southern California Super Lawyers
"Rising Star" – Environmental, General Litigation, Business Litigation (2013-2020)


  • JD, Tulane University Law School, 2006, summa cum laude
  • California
  • Nevada
  • US District Court, District of Nevada
  • US District Court, Central District of California
  • US District Court, Eastern District of California
  • US District Court, Northern District of California
  • US District Court, Western District of Michigan

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