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What Businesses Should Know About CERCLA Liability

William B. Hanley, Attorney At Law May 19, 2026

Environmental regulations can easily blindside a growing company or an ambitious property developer. When a business acquires land, the last thing the owners want to uncover is a history of toxic contamination. Understanding environmental liability is essential for anyone buying, selling, or operating a commercial property. At the federal level, the primary law governing these issues is the Comprehensive Environmental Response, Compensation, and Liability Act, commonly known as CERCLA or Superfund. 

With decades of hands-on legal experience and a long history of aggressive, effective representation, William B. Hanley, Attorney at Law, relentlessly protects his clients' bottom lines from unexpected environmental fallout. His clients often seek his help to resolve difficult disputes before they drain company resources. The firm serves clients throughout California, including Irvine, Newport Beach, Orange County, Los Angeles County, and San Diego County. 

Understanding CERCLA Liability 

Congress enacted CERCLA in 1980 to create a tax on the chemical and petroleum industries and to provide broad federal authority to respond directly to releases of hazardous substances that might endanger public health or the environment. The law established prohibitions and requirements concerning closed and abandoned hazardous waste sites. 

The most important feature of CERCLA for business owners to understand is how the law applies liability. Under CERCLA, liability is strict, joint, and several. Strict liability means the government does not need to prove negligence. If the contamination exists on the property, the responsible party must clean it up, regardless of whether they acted carelessly. Joint and several liability means that any single responsible party can be held liable for the entire cleanup cost, even if multiple parties contributed to the pollution. 

Who Can Be Held Responsible? 

CERCLA casts a very wide net when identifying Potentially Responsible Parties (PRPs). The Environmental Protection Agency can demand cleanup costs from several categories of individuals and businesses: 

  • Current owners and operators: If you own or operate the facility right now, you can be held liable, even if you did not cause the initial pollution. 

  • Past owners and operators: Anyone who owned or operated the property at the time hazardous substances were disposed of. 

  • Generators: The individuals or companies that produced the hazardous materials and arranged for their disposal at the site. 

  • Transporters: The people or companies that moved the hazardous waste to the site, provided they selected the location. 

Because current owners fall into this group, a business that simply buys a piece of contaminated real estate can suddenly face massive cleanup bills. It's important to speak with a dedicated environmental law attorney to learn more about your rights.

How Contamination Affects Real Estate and Business Transactions 

Discovering hazardous waste on a property changes the trajectory of any business transaction. For buyers and sellers, contamination devalues the land immediately. Traditional lenders rarely finance properties with known environmental issues, making it very difficult to secure a commercial mortgage. 

If a business already operates on a polluted site, the discovery of toxic materials can halt expansion plans. Construction must stop while the land is tested and cleared. The business may face lawsuits from neighboring property owners if the pollution migrates across property lines. Furthermore, the stigma of operating on a contaminated site can damage a company's public image. 

The Importance of Due Diligence 

Because buying property carries the risk of adopting someone else's mess, due diligence is a fundamental step in any commercial real estate transaction. Business owners must conduct All Appropriate Inquiries (AAI) before closing a deal. 

The industry standard for this inquiry is a Phase I Environmental Site Assessment. Environmental professionals review historical records, inspect the site, and look for signs of recognized environmental conditions. If the Phase I report identifies potential issues, the buyer will typically order a Phase II Environmental Site Assessment, which involves taking soil and groundwater samples for laboratory analysis. 

Conducting due diligence before buying the property is the only way a buyer can claim the "bona fide prospective purchaser" or "innocent landowner" defense under CERCLA. Without these assessments, the buyer absorbs the full risk. 

California Laws and CERCLA Liability 

California has robust environmental regulations that interact directly with federal laws. The state equivalent to CERCLA is the Hazardous Substance Account Act (HSAA). The Department of Toxic Substances Control (DTSC) oversees the enforcement of this act. 

Under California laws governing CERCLA liability, state environmental rules and cleanup obligations often parallel the federal framework but can impose additional requirements. For property owners, developers, and businesses, this means dealing with both the EPA and the DTSC. California law also includes the Polanco Redevelopment Act, which assists local agencies in cleaning up blighted properties and provides liability protections for developers who remediate the land. 

Businesses operating in the state must meet both federal standards and California's specific soil and water safety screening levels. Failure to meet the state's stringent cleanup targets can result in additional fines and mandatory remediation orders, even if the EPA has not intervened. 

What Business Owners Should Do When Contamination is Discovered 

If your business discovers hazardous materials on your property, or if a government agency alleges that your company contributed to a contaminated site, you must act carefully. 

First, stop any excavation or construction work immediately. Disturbing the soil can spread the pollution and increase your cleanup costs. Second, notify the appropriate regulatory agencies as required by law. Hiding the discovery will only lead to heavier penalties. Third, do not admit fault or take on voluntary cleanup obligations without consulting legal counsel. Finally, contact a qualified attorney who understands environmental and business litigation. Your legal counsel will help you track down old insurance policies, identify other Potentially Responsible Parties, and build a strategy to protect your company's assets. 

Environmental Law Attorney Serving Irvine and Newport Beach, California 

At the Law Offices of William B. Hanley, clients receive consistent updates and direct communication throughout their case, including matters involving CERCLA liability and what businesses should know. Attorney Hanley is prepared to take cases to trial when necessary and uses strategic advocacy to pursue favorable outcomes. As each case evolves, he adjusts strategies through negotiation or litigation. The firm serves Irvine and Newport Beach, Orange County, Los Angeles County, and San Diego County. Contact the office today to schedule a consultation.