"A number of people from overseas agencies and organisations have also been involved throughout the response," Mr Henderson said.
Meanwhile offshore, 463 containers have now been recovered from Rena and taken to the Port of Tauranga and another 65 have been recovered from the beaches and sea.
This week salvors removed four packets of wood from the Rena wreck via helicopter and are focusing on the ongoing container and debris removal from the forward section of the ship.
Two 40-foot containers and one 20-foot container were cut up and removed from the wreck while salvors emptied containers of leather skins by hand.
Container recovery company Braemer Howells is placing its main focus on Matakana Island, where helicopter and barge operations continue to remove timber, bits of container and other debris and Orokawa Bay, just north of Waihi Beach.
Timber was stacked and towed to a waiting barge at Orokawa Bay on Tuesday and the container will be cut up and removed.
Shore clean-up assessment teams surveyed beaches from Mount Maunganui to Papamoa East on Tuesday but found no significant oiling and yesterday were assessing the beaches stretch of coastline from Papamoa East to the Kaituna Cut.
The results from these surveys are fed into the planning process and guide the clean-up teams.
Oil spill response clean-up teams are for now focusing on Matakana Island, Mount Maunganui and Leisure Island, with about 65 people working in the field today. Oiled wildlife response teams were checking wildlife on Motiti Island yesterday.