Thiess Services Pty Ltd v Mirvac Queensland Pty Ltd

Thiess Services Pty Ltd applied for an interlocutory injunction to prevent Mirvac Queensland Pty Ltd from terminating a lump sum contract for the remediation of contaminated land. The contract was intended to facilitate a large scale residential and commercial development on the land. The dispute arose over the interpretation of the terms of the contract concerning the remediation of the land, particularly whether the remediation needed to be done economically or to an absolute standard. The court was tasked with determining whether the remediation obligation was to be determined by reference to the Remediation Action Plan (RAP) formulated by the parties or if the terms of the contract provided a definitive standard.

The primary legal issue before the court was the interpretation of the contract terms in relation to the remediation of the contaminated land. Specifically, the court needed to ascertain whether the contractor was required to remediate the site to a standard that would make it suitable for its intended use, and whether this standard was to be determined by the economic feasibility or an absolute standard as argued by the principal. The court also needed to examine the role of the RAP in determining the scope of the remediation obligations and whether the RAP was the sole determinant of the remediation process.

The court held that the contract did not impose an absolute remediation standard on the contractor. Instead, the remediation was to be conducted in a manner that was economically feasible, consistent with the requirements of the RAP. The court found that the RAP was a significant document that outlined the process by which the site was to be remediated, but it was not the sole determinant of the remediation standard. The court also noted that the contract did not specify that the remediation had to be completed to an absolute standard, and therefore, the contractor's obligation was to remediate the site in a manner that was economically viable. The court dismissed the application for an interlocutory injunction, finding that the contractor was not in breach of the contract by proposing a remediation process that was economically feasible.

The court's final order was that the application for an interlocutory injunction was dismissed.