Suncor's sulfur dioxide incident illustrates how complex and confusing air quality monitoring is after various agencies reported different amounts of the pollutant that were released into the air.

While the refinery's air quality permit is available online, how much sulfur dioxide the company is normally permitted to emit is unclear.One Delaware Environmental Release Notification System ...

Air monitors showed sulfur dioxide emissions had returned to normal levels by Wednesday afternoon, the agency said. Related Articles. Suncor’s Commerce City refinery is returning to full capacity ...

As for Suncor’s air permit, the amounts of sulfur dioxide it is allowed to release are measured two ways — in parts per million by volume on a 12-hour rolling average and pounds per hour. In a report ...

Sulfur dioxide is a gas composed of sulfur and oxygen that forms when fuel such as oil is burned. The Delaware City Refinery can process up to 180,000 barrels of oil per day.

As of 3 p.m. May 31, the Route 9 station's highest daily average sulfur dioxide level from this release has been 2.5 parts per billion on May 26, DNREC said.

Residents in Delaware City are concerned about their air quality after a mechanical breakdown at a refinery there last week has caused it to release sulfur dioxide, pushing the chemical's levels ...

Ambitious projects are trying to engineer the atmosphere. By David Gelles Lead author of the Climate Forward newsletter. Infusing clouds with sulfur dioxide to block the sun. Vacuuming carbon ...