Toxic tort litigation is complex, with the outcome of a case often turning on competing scientific, medical, and epidemiological evidence supporting or refuting claims of exposure and causation. Importantly, defendants have a wide range of evidentiary tools available to challenge liability. By leveraging medical records, exposure data, regulatory compliance documentation, and expert analysis, a defendant can strategically scrutinize a plaintiff’s claims of exposure and causation — and challenge the credibility of the scientific evidence upon which they rely.

Evidence Contradicting Exposure

Exposure evidence in a toxic tort claim refers to the documentation, testing, and expert analysis used to establish whether (and to what extent) a plaintiff was exposed to the alleged toxin. Without credible exposure evidence, a plaintiff would not be able to link the chemical to the claimed injury. An effective defense strategy can leverage exposure evidence to undermine causation claims, often by showing that the plaintiff was not exposed to the substance or that any exposure was insufficient to cause harm. For example, environmental and site testing may reveal that toxin levels were below the harmful thresholds. Industrial hygiene assessments can demonstrate that any exposure was minimal or within regulatory standards.

Lack of Causation or Alternative Causation Evidence

A defendant can also strengthen their position with lack of causation or alternative causation evidence. This type of evidence can be used to show that a plaintiff’s illness is more plausibly attributable to other conditions or risk factors than the substance in question. Medical records, occupational histories, and expert witness testimony can demonstrate that a plaintiff’s purported exposure predated the alleged incident or arose from unrelated sources. Documentation of prior employment, lifestyle risks, environmental factors, and exposure to other chemicals with stronger causal associations can substantially weaken a plaintiff’s liability claim and position the case for summary judgment.

Medical Evidence and Epidemiological Evidence

Medical and epidemiological evidence is central to defending against toxic tort claims, providing the scientific framework necessary to challenge a plaintiff’s speculative causation theories. Pre-existing condition records, treatment histories, diagnostic tests, and clinical records can show that symptoms predated exposure or reveal a pre-existing health condition that was the primary cause of injury. Similarly, epidemiological evidence, such as case-control studies or observational cohort studies, can further strengthen the defense by addressing general causation and undermining claims based upon anecdotal evidence or inconclusive research.

Expert Testimony

Expert witness testimony is a key component of any toxic tort defense. Qualified experts can expose flaws in the plaintiff’s scientific evidence to disprove causation, establish alternative exposure theories, and demonstrate that alleged exposures fall below harmful thresholds. Beyond providing the evidentiary foundation necessary to defeat causation, expert witnesses can simplify highly technical and scientific findings for the jury to help them understand the defense’s position.

Businesses may rely on testimony from the following types of experts to support a robust defense:

• Toxicologists
• Epidemiologists
• Engineers
• Regulatory and compliance experts
• Industrial hygienists
• Oncologists
• Pulmonologists
• Neurologists

Each type of expert can offer a unique perspective and play a crucial role in both shaping and bolstering a business’s defense at every stage of litigation.

Evidence of Regulatory Compliance

Businesses can strategically defend themselves by demonstrating compliance with all regulatory and safety requirements. Although compliance is not always dispositive, evidence of internal controls can support the argument that the business acted in accordance with applicable guidelines and industry standards.

To counter negligence claims, defendants may rely on:

• Safety data sheets and warning instructions
• Compliance certifications and permits
• Documentation demonstrating adherence to standards for exposure limits
• Employee training logs
• Monitoring reports
• Internal audits and risk assessments
• Manufacturing and testing protocol records
• Incident response records

While plaintiffs often assert non-compliance in their claims, meticulous record-keeping is vital to rebut these allegations.

Contact an Experienced Toxic Tort Attorney

If your company is facing a toxic tort lawsuit, it is essential to retain experienced counsel to safeguard your interests, reputation, and bottom line. By taking a client-centric approach and creating a customized strategy in every case, Cosmich is committed to delivering results-driven toxic tort defenses. With coast-to-coast offices, our attorneys are equipped to handle complex matters involving multiple claimants across jurisdictions. Contact us to schedule a consultation to learn more about our capabilities.