Syllabus

This decision addresses three petitions for review filed with the Environmental Appeals Board challenging the Clean Air Act prevention of significant deterioration ("PSD") permit issued by EPA Region II to AES Puerto Rico, L.P. ("AES") for construction of a 454-megawatt coal-fired power plant in Guayama, Puerto Rico.

Petitioners challenge aspects of the Region's permit decision relating to sulfur dioxide ("SO₂"), fine particulate matter ("PM[10]"), and environmental justice.

Held