"The problem with end of life tyre mountains is over time they leach contaminants that ultimately end up in groundwater. These tyre mountains also present a huge fire risk. A recent tyre fire near Christchurch that had significant effects on the local community involved around 20,000 tyres," he said.
"The Ecoversion venture resulted in the creation of two separate tyre mountains consisting of more than 200,000 tyres so you can imagine the environmental damage if either of these tyre stockpiles had caught on fire."
Holst said the sentencing decision made it clear that directors of companies "cannot avoid their responsibilities by blaming others".
"Judge Kirkpatrick's sentencing decision also sends a clear message that those disposing of tyres need to ensure they are disposed of appropriately at an approved site. It's not okay to simply stockpile end of life tyres in the Bay of Plenty.
"What happened with the Ecoversion tyres in the Bay of Plenty is repeating itself around the country.
"One of the priorities of the current Government is to establish a tyre stewardship fund. This is the solution New Zealand requires, as it would build the true life cycle cost of tyres into the purchase price, and remove the incentive to simply stockpile large tyre stockpiles."
The three defendants have until April 30 to remove the remaining tyres from the Kawerau site.