"We have seen some really innovative thinking come out of the response," she said.
"Over the past 13 days workarounds, such as enabling transfer of jet fuel by truck from Marsden Refinery to Auckland, plane-to-plane-refuelling at Auckland Airport, and converting chemical tanks at Wynyard to receive and store jet fuel have occurred."
The Government continues to be closely involved in monitoring the situation and remained on stand-by to scale up assistance if required, Collins said.
An investigation into the leak uncovered that the initial damage to the pipeline occurred months ago, before it burst on September 14.
As a result, 23 flights were cancelled in 24 hours following the rupture, disrupting thousands of travellers.
In response, the defence force sent the navy's oil tanker, HMNZN Endeavour, to Port Marsden to fill up with 4.8 million litres of diesel to deliver throughout New Zealand, twelve army drivers were also deployed to drive civilian tankers taking jet fuel to Auckland, Palmerston North and Napier.