William F. Tarantino

William F. Tarantino
Partner

425 Market Street

San Francisco, CA 94105-2482

wtarantino@mofo.com

(415) 268-6358

BAR ADMISSIONS

California

EDUCATION

University of California, Berkeley, A.B.

Johns Hopkins University, M.P.H.

Georgetown University Law Center, J.D.

Drawing on his considerable experience in environmental health, William (Bill) focuses his practice on environmental and consumer protection law, with an emphasis on climate-related goals and claims, hazardous substances, mass torts, and consumer product safety. Bill started his career at the U.S. Environmental Protection Agency, Office of Regional Counsel in San Francisco, and he currently leads the firm’s environmental practice.

Bill routinely advises clients in connection with their carbon reduction and climate-related goals and claims (including carbon neutral and net zero carbon commitments) and helps clients substantiate their claims and avoid greenwashing claims. He frequently advises clients in connection with the Federal Trade Commission’s Green Guides, state consumer protection statutes, and a broad range of sustainability and chemical disclosure laws. He defends clients in environmental and consumer class action litigation in courts throughout the country and is highly regarded for his ability to coordinate technical, legal, and communications teams to counsel clients through crises. He has tried cases in state and federal courts for a variety of complex and multidistrict litigation matters, including product liability claims and environmental and land use disputes.

Bill represents the firm’s clients in nearly every aspect of environmental regulation and supports the firm’s global transactional practices in all areas of U.S. environmental law. He is also a member of the firm’s ESG + Sustainability Steering Committee.

Environmental Litigation and Regulatory

Bill has represented the firm’s clients before a broad range of environmental regulatory agencies in rulemaking proceedings, permit applications, and appeals and enforcement actions. Bill heads MoFo’s environmental due diligence teams and serves as the lead on transactional negotiations involving environmental liability risks, including significant experience in cross-border transactions.

Consumer Class Action, False Advertising, and Product Liability

Bill has broad experience in consumer class action and false advertising litigation, especially concerning claims of health or environmental benefits. He has also advised numerous well known life sciences, technology, and consumer product companies on consumer disclosures and warnings, including compliance with U.S. and European requirements governing product safety.

More About Bill

Before entering private practice, Bill clerked at the U.S. Environmental Protection Agency, Region IX Office of Regional Counsel, where he assisted in the prosecution and resolution of cases brought by the U.S. Department of Justice for violation of the Clean Air Act, Clean Water Act, and Resource Conservation and Recovery Act.

Bill received his J.D. with honors from the Georgetown University Law Center and completed the Law and Public Health program sponsored by Georgetown University and the Johns Hopkins Bloomberg School of Public Health. Through this program, he earned a master’s in public health, as well as specialty certification in environmental health risk assessment from the Johns Hopkins Risk Sciences and Public Policy Institute. At Georgetown, he was an executive editor of the Georgetown International Environmental Law Journal and received the CALI Award for Excellence in International Environmental Law. In 2000, he studied law at the Universidad de Mendoza, in Mendoza, Argentina, as an international law fellow. He earned his bachelor’s degree from the University of California, Berkeley.

Experience

In re Lumber Liquidators Chinese Laminate Litigation

Bill was lead counsel for Lumber Liquidators, the nation’s largest specialty retailer of hardwood flooring, in over 130 class action cases in 28 states, a U.S. Consumer Product Safety Commission investigation, a California Air Resources Board enforcement action, and several state attorney general investigations. These matters arose from a 60 Minutes report alleging that the Company’s laminate flooring exposed consumers to excessive amounts for formaldehyde. Morrison successfully defended Lumber Liquidators in a trial based on California’s chemical warning law, Prop. 65, resolved the U.S. CPSC investigation without the need for a traditional recall, and resolved the remaining class action matters on favorable terms.

Maxus Energy Corporation

In the largest environmental bankruptcy in recent years, Bill was the lead environmental counsel for Debtor Maxus Energy Corporation. Maxus declared bankruptcy as it faced nearly $14 billon of environmental liabilities flowing from several legacy contaminated sites, including remediation of the Pasaaic River Superfund Site in New Jersey, the largest site in the United States. Bill led the successful efforts to resolve those liabilities (over creditor objections) and transfer obligations to otherwise responsible parties.

In re Hydroxycut Personal Injury and Class Action Litigation

Bill was lead counsel to the manufacturer and retailers of Hydroxycut, a popular weight loss supplement in over 100 personal injury cases, as well as nationwide false advertising and unfair competition class action claims that were brought in a federal multidistrict litigation proceeding and coordinated mass tort claims in three states. After extensive litigation to the eve of trial, the matter was resolved globally through mediation.

Los Angeles World Airport (LAWA)

Won a victory for client LAWA in a trial against a supplier that breached a contract to provide LAWA with highly specialized Airport Rescue Firefighting (ARFF) vehicles. After years of delay, and after receiving millions of dollars in payment from LAWA, the supplier delivered defective trucks that not only failed to meet LAWA’s performance, safety, and regulatory requirements, but put the safety of airport firefighters and the traveling public at risk. The supplier also asserted claims against LAWA. During trial, the 12-member jury unanimously found in favor of our client, finding that LAWA was not liable for breach of contract or good faith and fair dealing claims brought by the plaintiff.

Environmental Law Foundation v. Beech-Nut Nutrition Corp., et al

In a scientifically intensive trial, Bill led the development of experts in toxicology, food consumption, geology, agriculture, and food safety required to defend 10 major baby food and fruit juice brands from claims that they had excessive levels of lead in their products. After a four-week trial, the judge entered judgment in favor of the defense, finding that levels in the products fell below the threshold required by California’s Proposition 65 — one of the most significant trial court decisions in the statute’s 25-year history. The California Court of Appeal upheld the trial court’s decision.

Fitbit Force Recall

Bill was a part of the multi-office team that represented Fitbit before the U.S. Consumer Product Safety Commission with regard to the recall of one of its first wristbound trackers, the Fitbit Force. He worked with the legal and scientific teams to identify and mitigate the risk associated with the product and communicate that risk effectively to regulators and the public. Morrison & Foerster defended Fitbit in five class action lawsuits and over 300 personal injury lawsuits arising from the recall, all of which were favorably resolved.

People of the State of California v. The Coca-Cola Company

Bill represented The Coca-Cola Company in a lawsuit filed by the California Attorney General and Los Angeles City Attorney alleging unfair competition, defective design, public nuisance, and violation of Proposition 65, stemming from the unauthorized sale of Mexican Coca-Cola in California. After nearly three years of negotiations, all claims were resolved by consent judgment. Following entry of the consent judgment, we defended the company in follow-on attorney-fee litigation initiated by the private citizen who issued the initial Proposition 65 violation notice, reducing the multimillion fee claim by 90%.

Seagate Technology LLC

Represented Seagate Technology in its efforts to address hazardous material contamination that resulted from the abrupt bankruptcy and shut down of Solyndra’s 400,000-square-foot manufacturing facility and headquarters. Remediating this facility and putting it back into use is a high priority for the City of Fremont, California, as well as local environmental regulators.

Clif Bar, Inc.

Bill successfully secured the dismissal of a threatened Proposition 65 enforcement action that claimed that the Company’s signature Clif Bar contained elevated levels of acrylamide, a known human carcinogen. Bill coordinated the legal and scientific defense to convince the experienced plaintiff’s counsel that their case lacked merit.

Rankings

Legal 500 US, 2022-2024

Recommended in Dispute Resolution: Product Liability, Mass Tort and Class Action - Defense: Pharmaceuticals and Medical Devices

Legal 500 US, 2022-2024

Recommended in Dispute Resolution: Product Liability, Mass Tort and Class Action - Defense: Consumer Products (Including Tobacco)

Chambers USA, 2023-2024

Recognized Practitioner in California: Environment

Legal 500 US 2021

Named as "Other Key Lawyer" in Product Liability, Mass Torts, and Class Action for Consumer Products

Legal 500 US, 2018 – 2019, 2022-2024

Recommended in Dispute Resolution: Product Liability, Mass Tort, and Class Action - Defense: Toxic Tort

Legal 500 US, 2017 – 2020

Recommended in Industry Focus: Environment: Litigation

Legal 500 US, 2017 – 2020

Recommended in Industry Focus: Environment: Regulatory

Legal 500 US 2020

Recognized as an “Other Key Lawyer” in Dispute Resolution: Product Liability, Mass Tort, and Class Action: Toxic Tort Defense

Super Lawyers, 2017-2020

Selected to San Francisco Super Lawyers

Super Lawyers, 2010-2016

Selected to San Francisco Rising Stars

Best Lawyers in America 2025

Recommended in Natural Resources Law