The Challenge

Following the devastating Christchurch earthquakes, Mobil Oil New Zealand called upon ECL Group’s expertise to upgrade the damaged fuel and drainage systems at several sites.

While working on the project, ECL Group had to overcome extreme earthquake conditions such as severe liquefaction, drain sediment, changes to the water table and on-going aftershocks.

Liquefaction containing potentially harmful contaminants had to be removed from sites.

The projects required careful planning and execution to meet strict council consent conditions, minimise disruption to traffic, and maintain public safety.

ECL Group Solution

Two Mobil Service Stations required complete replacement. ECL Group were firstly involved in decommissioning the site, removing all fuels equipment, tanks, lines and dispensers.

A complete design/ build solution was provided.

Given the risk of continued seismic activity during installation a one metre deep concrete slab was poured to stabilise the petrol tanks and prevent future movement.

Three 50,000 litre fuel storage tanks were installed. Submersible pumps, fuel lines, dispensers, drainage and all electrical componentry were completely upgraded.

Forecourts were reinstated, with new tank slabs and asphalt to all affected areas.

The damage was so severe at one site it became an environmental risk. The decision was taken for ECL Group to completely decommission the site and reinstate the ground.


These projects were extremely challenging given the high risk environment that existed in Christchurch at the time. The ECL Group delivered a solution that ensured the Mobil retail operations were again able to operate in the Canterbury region.