There are many unanswered questions in the aftermath of this week's collapse of a 150-foot processing tower at Sarnia's Imperial refinery.
The company has promised a full investigation and provincial agencies are looking into the alarming incident that occurred Tuesday night.
An Ontario Ministry of Labour inspector and engineer attended the scene off Vidal Street South.
Ministry spokesperson Janet Deline said no orders or requirements have been issued but their investigation is ongoing.
Using handheld monitoring equipment, environment ministry staff did not detect any volatile organic compounds or sulphur dioxide or odours downwind of the plant. The St. Clair River, where the company has its discharge outfall, was also inspected and no visible sheen was observed.
Spokesman Gary Wheeler said ministry staff continue to follow-up with the company.
The Technical Standards and Safety Authority (TSSA) is also gathering information.
Spokesperson Laura Glynn said, however, that since the tower was not in operation, they are not conducting a formal investigation at this time.
The tower was being prepared for planned maintenance and did not contain petroleum products at the time of the collapse.
Luckily no one was injured.
Imperial Sarnia Refinery Manager Rohan Davis has issued a public statement.
"We recognize public trust and confidence are earned through performance, open communications and community involvement," said Davis. "We regret this incident and will make every effort to learn from it and apply preventative steps that are identified."
Imperial's contractor workforce was to return to the site Friday.
