The investigation also determined the area was not a bed of a river.
It was deemed no breach was identified nor was there any activity which was unlawful, Smith said.
''No action will be taken and the investigation is now closed.''
ES was quick to point out today, additional measures were taken during the investigation, including seeking legal advice to ensure correct interpretation of the relevant rules and a review of the investigation by the Environmental Protection Authority.
McCallum said today he would resume his role on ES regulatory committee.
''Being the subject of an investigation was a stressful experience to myself and my family and I am relieved it is over.
''Having said that, like all challenging situations in life there are learnings and opportunities.''
He would continue to review and improve farming practices to ensure the farm was operating at and above good practice.