A report commissioned by Quebec's environment ministry shows a PCB leak at a Pointe-Claire industrial site has spread to the soil and water under surrounding business lots.

When the PCB leak was first discovered last year, Environment Minister David Heurtel said the government would front the cost of the full decontamination of the site in question — Reliance Power Equipment site on Hymus Boulevard. The process is expected to cost nearly $4 million.

"This report tells us that the soil is contaminated under the installations of Reliance and [it] also indicates that there is soil contamination that may have seeped into the immediate neighbouring industrial around Reliance," said Heurtel.

"Now there is a concern regarding the underground water, but again, we've been working very closely with the City of Pointe-Claire, we've been working with [Montreal Public Health] and it's very important to point out currently there is absolutely no health risks linked to the contamination right now as we know it," Heurtel continued.

Reliance Power Equipment had been keeping transformers full of the dangerous chemicals unsupervised in its yard for the past 15 years.

The government has said in the past it will pay for the decontamination to get it done as quickly as possible, but that it would later go after Reliance Power Equipment for a refund.

Pointe-Claire Mayor Morris Trudeau said he has confidence that the site will be decontaminated as soon as possible.

"If there is contamination to be found, eventually it will be decontaminated. There will be core samples taken within the next few months of the surrounding properties and as I said, if it is contaminated it will be removed," he said.