Issued to our CLC on August 16, 2016: We are writing to inform you that we have experienced issues at the Electric Arc Furnace (EAF) steelmaking off-gas system which has caused emissions of EAF dust to be released from the bag house, where the dust is normally collected.

We reported this issue to the Ministry of Environment and Climate Change (MOECC).

Our teams continue to investigate to determine the cause and have been working to contain and correct the issue. Among the work underway is the replacement of the collection bags in the facility, work which will continue while the team also reviews the bag house infrastructure and design in order to determine further repair and maintenance or design requirements for optimum performance.

As is our normal process, in addition to reporting the issue to the (MOECC) their representatives have been on-site to review the issue and have accepted our plans to rectify the situation.

Although EAF dust mainly contains Iron, Calcium and Zinc Oxides, depending on the amount of exposure it can be hazardous due to trace amounts of compounds such as Manganese, Chromium and Lead Oxide which come from the scrap metals we use in the process. The EAF dust is normally collected in the bag house. However, our environment and occupational health teams are also closely monitoring this issue. Based on their study of emission opacity and duration as well as weather patterns, there has been and continues to be no indication of risk for human impact either on Dofasco’s property or off property.  As is our normal process, our teams continue to monitor all processes and areas of our facility to ensure the health and safety of everyone on our site as well as the safety of the community and the environment.

****UPDATE – August 18, 2016 11:30 AM EST****

We have received several questions from a CLC Member. They are addressed below:

Q1 Do you have a sense of how extensive the damage is to the baghouse – i.e. How many collection bags have been damaged and require replacement?

Q2 Can you provide any sense of how long before this problem has been corrected?

Q3 Has the company made any commitment to MOECC to have this resolved by a certain deadline?

A There are more than 6,000 collection bags at the EAF Baghouse which are arranged in compartments. Our teams have inspected the compartments with an automated technical system and replaced more than 425 damaged bags, resulting in a significant improvement in performance with virtually no emissions as of yesterday. Approximately 50 remaining damaged bags will be replaced on August 31st and September 1st. It’s quite a labour intensive process to change the bags and our teams are working as quickly as they can to complete this work.

To ensure long-term improved performance, we also plan to replace all the bags with special high heat-resistant bags.  We have committed to the Ministry to strive to complete this upgrade by the end of November.

About ArcelorMittal Dofasco

About ArcelorMittal Dofasco ArcelorMittal Dofasco is Canada’s largest producer of flat carbon steel and is part of the world’s largest steel and mining company. Headquartered in Hamilton, ON, with more than 4,500 employees each year we ship 4.5 million net tons of high-quality flat carbon steel to partners in automotive, energy, packaging and construction which are used in increasingly lighter, stronger and more sustainable products – from cans to cars. Our purpose is to produce ever smarter steels that have a positive benefit for people and planet. High performance steels made using innovative processes which use less energy, emit significantly less carbon and reduce costs. Steels that are cleaner, stronger and reusable. With steel at our core, our inventive people and an entrepreneurial culture at heart, we will support the world in making that change. This is what we believe it takes to be the steel company of the future. For more information about ArcelorMittal Dofasco, please visit:

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