San Diego Environmental Lawyers

 

Facing an environmental lawsuit or regulatory enforcement action in San Diego can feel overwhelming. Whether you’re a property owner, developer, manufacturer, or small business operator, the legal and financial stakes are significant.

Government agencies, plaintiffs’ attorneys, and environmental advocacy groups are well-resourced and aggressive. You need equally experienced and strategic counsel on your side.

Tropea McMillan LLP is an environmental defense litigation firm. We represent corporations, businesses, property owners, developers, and other entities that have been sued or targeted by enforcement actions for alleged environmental law violations.

If you’ve received a notice of violation, been served with a lawsuit, or are under investigation by a state or federal environmental agency, contact our team today at (866) 977-8921 for a confidential consultation.

What Do Our San Diego Environmental Defense Lawyers Do?

Environmental litigation sits at the intersection of science, regulation, and high-stakes civil liability. When an environmental claim is made against you or your business, you need attorneys who understand every layer of that complexity and can respond with precision.

At Tropea McMillan LLP, our work on behalf of defendants includes:

Defending Against Regulatory Enforcement Actions

State and regional have broad authority to:

• Investigate businesses and property owners
• Issue notices of violation
• Impose fines
• Seek cleanup orders

These actions can escalate quickly and carry severe financial penalties.

We represent clients at every stage of the enforcement process: from initial inspections and agency interviews to administrative hearings and appeals.

Our goal is to challenge the factual and legal basis for agency action, negotiate favorable resolutions where possible, and protect your ability to continue operating.

Defending Environmental Lawsuits

Environmental plaintiffs, including individuals, community groups, and government entities, often pursue complex, multi-theory litigation.

Claims may be brought under federal statutes like the Clean Water Act or CERCLA, or under California laws like the Hazardous Waste Control Law, the Porter-Cologne Water Quality Control Act, or Proposition 65.

We analyze every claim asserted against our clients, identify weaknesses in the plaintiff’s evidence and legal theories, engage scientific and technical experts, and build a defense tailored to your specific situation.

Negotiating with Government Agencies

In many cases, the most efficient path forward involves direct negotiation with the government agency pursuing enforcement. We communicate with regulators on your behalf, challenge overstated allegations, and work toward consent agreements, compliance schedules, or settlements that minimize penalties and avoid litigation.

Our attorneys understand how California agencies operate and what they need to close a case. That knowledge helps us negotiate from a position of strength.

Advising on Compliance to Prevent Future Liability

Once a regulatory matter is resolved, the goal is to ensure you don’t face the same issues again. We advise clients on their obligations under applicable environmental regulations and help them develop internal compliance programs.

We also review permits and operational practices to identify and address potential vulnerabilities before they become enforcement targets.

Key California Environmental Laws That Affect Defendants

California has some of the most stringent environmental regulations in the nation. Understanding which laws apply to your situation and how regulators and plaintiffs use them is essential to mounting an effective defense.

The Hazardous Waste Control Law (HWCL)

The HWCL governs the generation, handling, storage, transportation, and disposal of hazardous waste in California. The Department of Toxic Substances Control (DTSC) enforces this law and can assess significant civil penalties for violations, even technical ones.

Defendants in HWCL cases often face allegations related to improper storage, documentation failures, or disposal practices.

We scrutinize agency findings, challenge the classification of materials as hazardous waste where appropriate, and ensure that any enforcement response is proportionate and legally sound.

The Porter-Cologne Water Quality Control Act

This foundational law governs water quality across California and gives regional water quality control boards broad authority to regulate discharges, whether intentional or accidental, into waterways, groundwater, and coastal waters.

Businesses, developers, and property owners near San Diego Bay, local rivers, and coastal areas frequently encounter Porter-Cologne enforcement. We represent clients facing waste discharge requirements, cleanup and abatement orders, and civil liability under this statute.

The California Clean Air Act and Air Quality Regulations

California’s air quality standards are among the most rigorous in the world, enforced by the California Air Resources Board and local air quality management districts such as the San Diego Air Pollution Control District.

Businesses operating in industrial zones, warehouses, and manufacturing facilities can face inspections, permit violations, and significant penalties.

We defend clients against air quality enforcement actions, challenge allegedly deficient permit conditions, and represent businesses in administrative proceedings before air district hearing boards.

Proposition 65: The Safe Drinking Water and Toxic Enforcement Act

Proposition 65 creates significant exposure for businesses operating in California. It requires warnings about chemicals listed by the state as known carcinogens or reproductive toxicants.

Private plaintiffs can bring suit under Proposition 65 and seek civil penalties of up to $2,500 per day per violation, plus attorney’s fees.

We defend businesses against Proposition 65 claims, challenge the adequacy of plaintiff exposure assessments, and negotiate settlements that limit financial exposure while preserving your ability to continue operating. We also counsel clients on implementing warning programs that minimize future litigation risk.

The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)

Federal Superfund law imposes broad, sometimes retroactive liability on parties associated with contaminated sites. These include current and former property owners, operators, transporters, and waste generators.

CERCLA liability can be joint and several, meaning a single defendant may bear responsibility for an entire cleanup even if others contributed to the contamination.

We represent clients in CERCLA cost recovery actions, contribution claims, and negotiations with the EPA and other potentially responsible parties (PRPs). Our goal is to limit your allocated share of liability and identify other responsible parties who should bear their proportionate costs.

Types of Environmental Cases We Defend

Environmental disputes take many forms. Each type of case requires a specific defense strategy based on the nature of the alleged violation, the applicable law, and the evidence available.

Defense of Toxic Tort Claims

Toxic tort litigation involves claims that a business or property owner caused personal injury or property damage through exposure to hazardous substances. These cases are often scientifically complex and factually intensive, involving expert testimony from toxicologists, epidemiologists, and environmental engineers.

Plaintiffs in toxic tort cases frequently rely on speculative causation theories and cherry-picked scientific evidence. We retain qualified experts to challenge those theories and present scientifically defensible alternative explanations.

In cases near San Diego’s industrial corridors and former military sites, these disputes can be particularly complex, and rigorous expert-based defense is essential.

Defense of Water Pollution Enforcement and Litigation

Water discharge violations are among the most common environmental enforcement actions in California. We represent clients facing allegations of Clean Water Act violations, unpermitted discharges, stormwater permit noncompliance, and Porter-Cologne enforcement actions before regional water boards.

We investigate the alleged discharge, challenge monitoring data and methodology, and dispute liability where the evidence does not support the agency’s or plaintiff’s claims.

Defense of Air Quality and Emissions Claims

Facilities that operate industrial equipment, handle volatile organic compounds, or engage in construction activities may face enforcement for alleged air emissions violations. We defend clients before the San Diego Air Pollution Control District and in civil litigation involving air quality claims.

We analyze permit terms, emissions calculations, and agency inspection records to identify errors, procedural deficiencies, and legal overreach.

Defense of Hazardous Waste Disposal Claims

Improper storage or disposal of hazardous waste can trigger enforcement by DTSC, cleanup orders, and civil claims from neighboring property owners. We represent clients in responding to these actions, challenging the factual basis for alleged violations, and negotiating cleanup obligations that are technically justified and financially manageable.

Defense Against Industrial and Agricultural Runoff Claims

Runoff cases often involve disputed scientific questions about the source and extent of contamination. Plaintiffs and regulators may attribute runoff impacts to your operations without adequate proof of causation. We work with environmental scientists and hydrologists to challenge those attributions and present alternative source evidence.

Environmental Due Diligence Defense in Real Estate and Business Transactions

When businesses are acquired or properties change hands, environmental liabilities can follow. We represent buyers, sellers, and operators facing claims arising from transactional environmental due diligence failures, undisclosed contamination, and indemnification disputes.

Who We Represent

Tropea McMillan LLP represents a broad range of clients on the defense side of environmental litigation and enforcement:

• Corporations and Industrial Facilities facing regulatory enforcement, citizen suit litigation, or contamination liability under state and federal law.
• Small and Mid-Sized Businesses that have been targeted by Proposition 65 claims, agency inspections, or notices of violation and need practical, cost-effective defense.
• Real Estate Developers and Property Owners dealing with contamination allegations, cleanup orders, or neighbor complaints related to development activity.
• Agricultural Operations facing claims related to runoff, pesticide use, or discharge permit compliance.
• Contractors and Construction Companies responding to air quality enforcement, stormwater permit violations, or hazardous material handling claims.

If your business or property is under legal or regulatory pressure related to environmental law, call Tropea McMillan LLP at (866) 977-8921. We’ll help you understand your exposure and your options.

Why Environmental Defense Requires Specialized Counsel

Not every environmental litigator is equipped to defend these cases. Many environmental attorneys focus exclusively on plaintiff-side work or regulatory consulting. The defense side demands a different orientation: skepticism toward agency findings, fluency with scientific evidence, and a clear-eyed view of how to minimize liability rather than maximize recovery.

At Tropea McMillan LLP, we come to every case from the defense posture. We know how enforcement actions are built and where they are most vulnerable. We understand the litigation strategies used by plaintiff environmental firms and how to counter them effectively.

We know how to work with technical experts, including engineers, geologists, toxicologists, and chemists, to challenge the science underlying environmental claims.

Our clients are often dealing with cases that involve:

• Disputed causation and source attribution
• Regulatory overreach or procedural defects in agency action
• Scientifically flawed contamination assessments
• Overstated damages or remediation cost estimates
• Claims brought years or decades after the alleged conduct

In each of these scenarios, winning requires more than legal knowledge. It requires the ability to engage the technical substance of the case and present compelling evidence. That is what we do.

If you or your business is facing an environmental lawsuit, regulatory enforcement action, or government investigation in San Diego, time is critical. Evidence must be preserved, deadlines must be met, and your legal strategy must be developed before the other side gains the upper hand.

Tropea McMillan LLP’s environmental defense lawyers provide thorough, aggressive representation at every stage, from the first notice of violation through trial or appeal. We know how these cases are built, and we know how to defend them.

Call us today at (866) 977-8921 to request a confidential consultation. Let us evaluate your situation, explain your options, and get to work protecting your interests.

 

Tropea McMillan, LLP

Address: 4747 Morena Blvd Suite 250A
San Diego, CA 92117
Phone: (866) 977-8921