"To protect the integrity of this active investigation, no further information is able to be released at this time."
The council has been responding to complaints of smoke and odour from the Pukemiro and Glen Afton communities since a fire broke out on the site on August 16. The investigation was launched at the time to look into the circumstances.
The RMA investigation is separate from the multi-agency incident management team (IMT), which was established by the regional council at the beginning of November to ensure a joined-up and coordinated response to the fire and its effects on the community.
The IMT is continuing to operate and is now led by Waikato District Council. It is monitoring the situation, as well as co-ordinating ongoing soil, air and water quality testing.