Greyhound Recycling has admitted that odours from its waste plant at Clondalkin in Dublin were in breach of environmental laws.
The Environmental Protection Agency brought district court prosecutions in respect of breaches under the Waste Management Act 2011 between August 2011 and May 2012.
The court heard evidence from a number of EPA inspectors, including Lisa Maher who testified today.
She said the plant at Crag Avenue caused a significant odour at two upwind locations during an assessment on 29 March last year, which followed complaints from members of the public over the previous five days.
Ms Maher said the odours posed a significant interference to the amenity and the amenity of the area.
She said there were a number of other breaches of licensing conditions, including the doors of the plant being left open.
There were also bales of waste left outside in the yard where the concrete was broken, which could have caused leakage into the soil.
There was also waste debris and pools of black liquid in the yard as well as waste accumulating around a skip.
In a building that is supposed to be reserved for dry uncontaminated recyclable waste, she found bales of Solid Recovered Fuel which is taken from domestic and commercial waste and was causing an odour.
The company has pleaded guilty to four breaches of waste regulations.
But lawyers for Brian Buckley of Greenlea Road and Michael Buckley of Fortfield Road both in Terenure, Dublin submitted there was no evidence that they were directors at the time.
Judge John O'Neill said he will rule on this on 10 December.