A black tide of oil sweeps over a bit of driftwood on Papamoa Beach. Photo / Alan Gibson
Thousands of tonnes of sand could be removed from popular Bay of Plenty beaches to extract the fuel soaking into the ground.
With the salvors of the Rena reporting that the ship's two remaining oil tanks are not leaking, much of the focus is on cleaning up the 350 tonnes
in the sea and on beaches.
Maritime New Zealand is negotiating with local companies to dig up badly affected spots or areas where the oil is difficult to remove by hand.
The agency estimates that for every tonne of oil soaked into beaches, 10 tonnes of sand will have to be removed.
Coastal and marine systems expert Professor Chris Battershill, of Waikato University, said removal of sand was a last resort, but it had the advantage of completely extracting the toxic fuel from the beach environment.
