All of the hazardous goods containers stored above deck on the Rena have now been removed from the wreck.

The final four hazardous goods containers located above deck were removed by salvors on Monday and have been brought to shore for processing.

Rena photographed at 6am by LOC with the container barge Smit Borneo close by to recommence container lifting operations today.

Maritime New Zealand reports the containers held empty tanks that once contained hydrogen peroxide, and still have residual amounts of the chemical inside.

Container processing company Braemar Howells is handling the containers and MNZ says there are procedures and plans in place to process the hazardous materials.

There were 32 dangerous goods containers on the ship when it ran aground on October 5.

MNZ confirms there are still hazardous containers in the hull of the wreck, including six containers holding ferrosilicon, potassium nitrate and potassium superoxide.

These are below deck in the sunken stern section of Rena.

A further 20 containers of cyolite were in the sunken number three hold and MNZ believes many have been released and are expected to have sunk close to the wreck due to their weight.

One container of dangerous goods containing alkylsuphonic liquid, which is water soluble, was lost from the ship during the storm on October 11.

The contents are not considered a significant health risk, but may cause some localised effects to the seabed, which are subject to ongoing monitoring.

Salvors are continuing to remove the estimated 360 containers still remaining on the bow section of the ship, with a total of 43 now removed since the vessel broke in two during a storm on January 8.

On Monday, salvors removed 18 packets of timber manually from the bow and will continue to unload and remove further containers this week as the weather is forecast to stay fine until Thursday.

About 40 oil spill responders are working on cleaning-up areas around Mount Maunganui, Matakana Island, Rabbit Island, Leisure Island and at Kauri Point.

MNZ says an observation flight this morning confirmed a metallic sheen around the wreck with a small amount of dark oil within it.

A lighter sheen was observed stretching about 3km from the wreck.