Weston Aluminium Pty Ltd v Environment Protection Authority

Weston Aluminium Pty Ltd appealed to the Court of Appeal of New South Wales against orders of the Land and Environment Court concerning its obligation to pay contributions under section 88 of the *Protection of the Environment Operations Act 1997* (NSW). The dispute centred on whether Weston Aluminium was the occupier of a scheduled waste disposal facility, thereby triggering the requirement to pay contributions. The Environment Protection Authority (EPA) contended that Weston Aluminium's activities constituted waste disposal, while Weston Aluminium argued its operations involved treatment and processing, not disposal, and thus it was exempt from the contribution requirement.

The Court of Appeal was required to determine the meaning of "waste disposal" within the context of the *Protection of the Environment Operations Act 1997* (NSW) and the *Protection of the Environment Operations (Waste) Regulation 2014* (NSW). Specifically, the court had to consider whether the thermal processing of aluminium dross undertaken by Weston Aluminium fell within the definition of "waste disposal" for the purposes of section 88 of the Act and clause 20(3) of the Regulation, or if it constituted treatment and processing that did not amount to disposal. The court also had to consider the role of headings in statutory interpretation, particularly the heading to a clause, as an extrinsic aid to construction.

The Court of Appeal allowed the appeal, finding that the term "waste disposal" in the relevant legislation did not encompass the treatment and processing of waste that led to its destruction or transformation. The court reasoned that the statutory context indicated a distinction between disposal and treatment or processing. It held that Weston Aluminium's activities, which involved the thermal processing of aluminium dross to recover valuable materials, constituted treatment and processing rather than disposal. Consequently, Weston Aluminium was not considered the occupier of a scheduled waste disposal facility for the purposes of section 88 of the Act. The court declared that Weston Aluminium Pty Ltd was exempt from the requirement to pay contributions and ordered the EPA to pay Weston Aluminium's costs of the trial and the appeal.