DELAWARE CITY — An outage Thursday morning at the Delaware City Refining Company that resulted in excess emissions of pollutants was resolved by midday when the refinery’s carbon monoxide boiler on the fluid coking unit was brought back online, the Department of Natural Resources and Environmental Control said.

The outage had resulted in unpermitted emissions of carbon monoxide, sulfur dioxide, hydrogen sulfide, ammonia, hydrogen cyanide and particulate matter.
The Division of Air Quality continued to assess and monitor the situation at the refinery after the carbon monoxide boiler came back online.

The Department of Natural Resources and Environmental Control’s monitoring station near Delaware City did not show elevated levels of particulate matter resulting from the carbon monoxide boiler outage, and the department does not expect the excess emissions to impact public health and safety.

The department is also investigating the refinery’s unpermitted release of pollutants and will take appropriate follow-up action, to include enforcement if warranted.