TOLEDO, Ohio (AP) - A refinery in northwest Ohio is seeking state approval for a $300 million upgrade to refine tar sands from Alberta, Canada.

TOLEDO, Ohio (AP) A refinery in northwest Ohio is seeking state approval for a $300 million upgrade to refine tar sands from Alberta, Canada.

Spokesman Mel Duvall with Canada-based Husky Energy Co. said the type of heavy crude most likely to be refined in Lima (LY'-muh) differs from the company's vast reserves of bitumen, although both are in Alberta.

The (Toledo) Blade (bit.ly/19IF5Ve) says Husky is seeking an Ohio Environmental Protection Agency permit for equipment changes required to stay in compliance with federal air-pollution laws.

The agency will accept comments at a public information session Tuesday at the Lima City Council chambers and written comments will be accepted through Oct. 7.

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Information from: The Blade, http://www.toledoblade.com/