Water samples from the stream are being analysed to see whether any water contamination occurred when
Waikato Regional Council emergency response manager Rob Dragten said the samples were presently at the lab, and while preliminary results might be available later today, final results would not be available until next week.
However he did not expect the water samples to show any contamination.
"The indications we've had from the scene and the assessments of where the hazardous material was, we don't expect to find anything. The samples are really a double-check just to confirm that our expectations are correct.''
At the crash site, a clean-up team has been clearing the rubbish from the riverbank and stream.
Garth Oakden of Turangi-based Tongariro River Rafting said the company was back operating on the Tongariro River today. It had been participating in a New Zealand Rivers Association rescue course on the river yesterday when news broke of the crash. The rescue course had been moved from the Tongariro to the Whakapapa River and rafting on the Tongariro was temporarily suspended as a precaution.
Local hapu Ngati Hikairo is considering holding a blessing at the accident site.