Citation: Work Cover (Inspector Battye) v Patrick Container Ports Pty Ltd [2014] NSWDC 171
Court: District Court of New South Wales
Date: 17 February 2014
Judge(s): Curtis J
Background
The defendant was a container port operator charged under section 8(1) of the Occupational Health and Safety Act 2000 following a fatal workplace incident at Port Botany on 2 September 2010. An experienced mechanic employed by the defendant began removing a rear tyre from a heavy reach stacker without first deflating it, contrary to safe practice. The tyre was inflated to approximately 150 psi and contained within a steel rim assembly held in place by a rim clamp.
When the mechanic removed the rim clamp, a pre-existing fracture in the rim flange caused a catastrophic failure. The tyre exploded, killing the mechanic and injuring two of his colleagues. A post-mortem blood test revealed the mechanic had methylamphetamine present at a concentration well above the therapeutic range, which a forensic toxicologist concluded could have contributed to impaired judgment and increased risk-taking behaviour.
The prosecutor alleged the employer had failed to ensure the safety of its employees by not conducting a formal documented risk assessment, not directing the mechanic to consult the operating manual, not providing documented formal training, and not providing adequate supervision.
Legal Issues
- Whether the employer's alleged failures to conduct a formal risk assessment, provide documented training, instruct the employee to consult the operating manual, and provide adequate supervision were causally connected to the fatal incident
- Whether those failures, if established, constituted a breach of section 8(1) of the Occupational Health and Safety Act 2000
- Whether any such failures had a substantial or significant effect on the cause of the event in light of the employee's existing knowledge and his state of intoxication at the time
Decision
Issue 1: Risk Assessment
The court found that the absence of a formal documented risk assessment was irrelevant in the circumstances. The supervisor had already identified the relevant risk (catastrophic blowout) and communicated it to employees. A more formal written assessment would have identified nothing additional. The court also rejected the prosecutor's contention that a breach of the employer's own internal policy requiring documented assessments was equivalent to a breach of the statutory duty.
Issue 2: Failure to Instruct Regarding the Operating Manual
The court held that a failure to direct the mechanic to consult the operating manual could not be causative of his failure to follow safe procedure if he already knew the procedure's content. The evidence established that he did.
Issue 3: Training
The court accepted that the supervisor had personally instructed the mechanic in the correct deflation procedure, had watched him carry it out four times on the occasion of instruction, and had attended his work periodically thereafter. Curtis J observed that documenting training cannot, of itself, prevent injury; it is a failure to actually inform or train that creates risk. The court was satisfied the mechanic had been properly trained.
Issue 4: Supervision
The court rejected the contention that the employer was obliged to ensure the supervisor was physically present at all times when the mechanic performed a task within his own area of skill and experience. Curtis J described this requirement as impracticable and without merit.
Overall Causation
Even accepting, contrary to these findings, that each particular failure had occurred, the court held that none of those failures would have had a substantial or significant causal role in the incident given the mechanic's established knowledge of the correct procedure and the far more immediate causal factor of his acute drug intoxication. The court applied the principle from Royall v The Queen that, in criminal proceedings, a cause must be a substantial or significant contributor to the event to ground moral culpability.
Orders Made
- The information is dismissed
- The prosecutor is to pay the defendant's costs
Key Takeaways
- A failure to document a risk assessment or training does not, of itself, constitute a breach of the statutory duty under the Occupational Health and Safety Act 2000 where the relevant risk was actually identified and communicated to employees in practice.
- Under the causation standard applicable to criminal proceedings, an omission must be a substantial or significant cause of the harmful event; a connection that is merely technical or theoretical is insufficient to ground a finding of moral culpability.
- The District Court confirmed that where an employee already possessed the knowledge that a training requirement or instruction was intended to impart, the omission of that formal step cannot be causally linked to the injury that followed.
- A requirement that a qualified, experienced employee be supervised at all times while performing tasks within their area of competence was characterised as impracticable and legally without merit.
- An employee's undisclosed drug intoxication, unknown to and not reasonably foreseeable by the employer, can displace or substantially diminish the causal significance of an employer's procedural shortcomings in a workplace safety prosecution.
Legislation and Cases Referenced
Legislation
- Occupational Health and Safety Act 2000
Cases
- Royall v The Queen [1991] HCA 27; (1991) 172 CLR 378