Supreme Court of New Zealand · [2016] NZSC 89
The Supreme Court held that lease wording requiring contaminated industrial land to be returned in good order and clean and tidy did not...
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The Auckland waterfront properties had been used for bulk oil storage since the mid-1920s. Mobil's corporate predecessors later took over the leases, and 1975 and 1985 agreements replaced the earlier arrangements.
By 1985 the soil was already heavily contaminated. When the final tenancies ended in 2011, redevelopment for general commercial and residential use required soil removal to a depth of about three and a half metres and replacement with clean fill.
The 1985 agreements required Mobil to keep the properties, and return them at the end, in good order and clean and tidy. Development Auckland argued that this wording reached subsurface hydrocarbon contamination.
It also argued for an implied term requiring Mobil to remediate contamination caused by Mobil and earlier occupiers. The High Court rejected both routes. The Court of Appeal accepted the express-clause argument and awarded NZ$10 million. The Supreme Court restored the High Court result.
| Argument | Supreme Court result |
|---|---|
| Clean and tidy required soil remediation | Rejected on the natural meaning and scheme of the agreements. |
| A remediation term should be implied | Rejected because the agreements worked without it and the term was neither obvious nor consistent with the express clause. |
The decision is not a general rule that tenants escape environmental responsibility. It turns on the language, context and history of these agreements.
A modern lease may impose express contamination, reinstatement, statutory-compliance or indemnity obligations. Environmental statutes and resource consents can create obligations outside the lease. A business should therefore read the whole risk package rather than relying on the phrase 'clean and tidy'.
Key points
Establish the baseline
Record the site's history, known contamination and condition before occupation begins.
Allocate investigation duties
State who can test, who pays and how results are shared and used.
Define remediation
Specify the trigger, standard, authority approval, causation period and completion evidence.
Plan the exit
Start testing and make-good planning early enough to resolve disputes before handover.
Keep technical evidence
Retain reports, photographs, waste records, consents and communications for the life of the lease.
No. It interpreted the particular 1985 agreements and rejected the implied term argued in that case. Different express clauses, statutory duties or facts can produce liability.
The sites were already heavily contaminated when the 1985 agreements began, and Mobil did not inherit every earlier Australian company's liability. The baseline and contractual period were central to the risk-allocation problem.
Commission an appropriate condition and environmental assessment, attach the baseline to the lease and record known contamination, permitted use, monitoring and end-of-term obligations.