EPA said Pilkington modified two glass melting furnaces allowing fuel to be burned in the presence of oxygen rather than normal air. This increased the maximum capacity of the furnaces and increased particulate (ash, dust, soot) emissions.
EPA alleges that Pilkington violated performance standards for new sources of air pollution by failing to comply with notification and testing requirements. In addition, EPA alleges that the modified furnaces have discharged excessive particulate emissions into the atmosphere.
These are preliminary findings of violations. To resolve them, EPA may issue a compliance order, assess an administrative penalty or bring suit against the company. Pilkington has 30 days to meet with EPA to discuss resolving the allegations.