Barrie Fire inspectors were back on scene at Global Electric Electronic Processing Friday as the investigation continues into a large blaze this week.
"The site is still in control of fire department for today. The Ministry of Labour is also on scene. Our two fire inspectors expect to be there all day. MOL will have work to be done before the plant can reopen but we are hoping to be out by the end of today," said Barrie Fire media officer Samantha Hoffmann.
About 84 staff members were forced to evacuate the building Wednesday after flames erupted in a precious metals shredder.
There were no injuries but low levels of “very toxic” hydrogen cyanide gas were detected although not enough to prompt an evacuation of the neighbourhood, fire officials said.
It was the sixth fire at the plant in the past two years and the third this month alone.
Barrie's Fire Chief told a news conference Thursday that his department is 'concerned' about the frequency of fire calls.
The company is working with investigators to resolve ongoing issues, officials said.
Investigators from the Office of the Ontario Fire Marshal and Emergency Management have wrapped up their probe on site, according to Hoffmann.
More than 200 people work at the 50,000 square-foot facility that recycles electronics into reusable materials.
GEEP was profiled on a Discovery Channel program last year.