What has the investigation into the 2024 Parkland Refinery chemical leak found so far?

On a Sunday morning in January of 2024, a chemical haze blanketed much of the Lower Mainland. It was because of a chemical leak at the Parkland Refinery in Burnaby. Metro Vancouver has been investigating the incident ever since - but so far, the company has been unwilling to hand over many of the related documents. The CBC's Jon Hernandez has been looking into it. Stephen Quinn speaks with him for more.