Nearly half of the oil left on board the grounded container ship Rena in Tauranga has now been pumped off to the bunker barge Awanuia. Maritime New Zealand (MNZ) Salvage Unit Manager, Bruce Anderson said 164 tonnes had been pumped off the ship over the past 24 hours, the highest daily rate to date. This brings the total amount of oil pumped off the ship to 645 tonnes, with about another 700 tonnes still on board. All of the oil pumped off so far has come from the port number 5 tank…