Petroleum Company of Trinidad and Tobago Ltd v Ryan & Anor (Trinidad and Tobago)

Factual and Procedural Background

Since 1994 the Plaintiffs—father and daughter—have lived approximately 45 feet from a disused oil well identified as “FZ94,” owned and formerly operated by Company A. The well was drilled in the 1920s, produced oil until 1943, and was then plugged with cement at three depths. In 1999 Company A detected an oil stain and instituted periodic removal of seepage. In early 2006, after renewed complaints of odour and medical concerns, Company A undertook a major “re-abandonment” project, replacing plugs and capping the well, at a cost estimated at T$200,000.

Both Plaintiffs were diagnosed in 2006 with serious respiratory illnesses—pulmonary fibrosis for the father and reactive airways disease for the daughter—which they attributed to hydrocarbon emissions from the well. They sued Company A in negligence and nuisance. The High Court (Judge Rajkumar) dismissed the claims in 2010. The Court of Appeal (two judges in the majority, one dissenting) reversed and awarded damages. Company A appealed to the Judicial Committee of the Privy Council. The present judgment resolves that final appeal.

Legal Issues Presented

1. Whether the Court of Appeal was entitled to overturn the trial judge’s findings of fact concerning the existence and extent of hydrocarbon emissions (“the emissions issue”).
2. Whether the medical evidence established a causal link between any emissions and the Plaintiffs’ illnesses (“the medical evidence issue”).
3. Whether, as a matter of law, a more flexible or policy-driven approach to causation (derived from authorities such as Bonnington Castings) should be applied.

Arguments of the Parties

Appellant's Arguments (Company A)

• The trial judge’s factual findings—that any pre-2006 seepage was minimal, effectively monitored, and not shown to produce harmful gaseous concentrations—were well within the evidence and should not have been disturbed.
• The Plaintiffs produced no quantitative or scientific data demonstrating harmful levels of volatile organic compounds (“VOCs”) before 2006.
• The medical experts failed to establish that pulmonary fibrosis or reactive airways disease can be caused by low-level hydrocarbon exposure of the type alleged.
• The alternative, policy-based approach to causation proposed by the majority below is inapplicable because no evidential link between emissions and injury was ever proved.

Respondents' Arguments (Plaintiffs)

• The Court of Appeal correctly inferred continuing gas emissions from Company A’s own documents and actions, including the 2006 re-abandonment application citing protection of “human health and environment.”
• The trial judge applied an unduly stringent burden of proof, ignoring that information about the well and its testing rested exclusively with Company A.
• Medical literature, referenced by their experts, showed that “hydrocarbon pneumonitis” can progress to pulmonary fibrosis, supporting causation on the balance of probabilities.
• Even if strict “but-for” causation was not satisfied, precedents such as Bonnington Castings justify liability where a defendant’s contribution materially increased the risk of injury.

Table of Precedents Cited

Court's Reasoning and Analysis

The Privy Council re-examined both factual and legal grounds invoked by the Court of Appeal.

• Emissions Issue: The trial judge recognised seepage of liquid hydrocarbons but found no evidence of gaseous concentrations sufficient to be detected or cause harm. The Court of Appeal’s criticisms—alleged inconsistencies, misunderstanding of air-testing, and misallocation of burden—did not disclose a material error or misapprehension of evidence. Accordingly, appellate intervention was unjustified under Henderson.
• Medical Evidence: All experts agreed on diagnoses but diverged on causation. The Plaintiffs’ experts relied on sparse literature and patient history; Company A’s experts stated that no study links low-level well emissions to the diseases. The Board found no grounds to deem the defence evidence “discredited” or to fault the trial judge’s conclusion that causation was unproven.
• Alternative Causation Approach: The Board rejected the majority’s attempt to invoke Bonnington and related authorities. Those cases presume some demonstrated causal contribution by the defendant, which was absent here.
• Overall Assessment: The trial judge’s decision was reasoned and supported by the evidence. The Court of Appeal exceeded permissible bounds in overturning it.

Holding and Implications

APPEAL ALLOWED. The High Court’s order dismissing both Plaintiffs’ claims is restored. Unless further submissions are filed within three weeks, the Plaintiffs must pay Company A’s costs at all stages.

The decision’s practical effect is confined to the parties: the Plaintiffs recover nothing and bear costs; Company A faces no liability. The Board set no new precedent, simply reaffirming orthodox principles on appellate restraint and causation.