SIP Proposal: Arizona (limited approval and limited disapproval of revisions concerning sulfur dioxide emissions from a primary copper smelter in Hayden, Arizona). 

SIP Proposal: Arizona (limited approval and limited disapproval of revisions concerning sulfur dioxide emissions from a primary copper smelter in Hayden, Arizona). 

SIP Proposal: Arizona (limited approval and limited disapproval of revisions concerning sulfur dioxide emissions from a primary copper smelter in Hayden, Arizona). 

SIP Proposal: Arizona (limited approval and limited disapproval of revisions concerning sulfur dioxide emissions from a primary copper smelter in Hayden, Arizona). 

EPA found that it is not appropriate and necessary to regulate hazardous air pollutant emissions from coal- and oil-fired electric utility steam generating units (EGUs), thereby reversing the Agency's prior conclusion under CAA §112(n)(1)(A); the Agency also finalized the residual risk and technology review conducted for the coal- and oil-fired EGU source category regulated under NESHAPs, commonly referred to as the Mercury and Air Toxics Standards (MATS), and did not promulgate any revisions to the MATS rule. 

EPA found that it is not appropriate and necessary to regulate hazardous air pollutant emissions from coal- and oil-fired electric utility steam generating units (EGUs), thereby reversing the Agency's prior conclusion under CAA §112(n)(1)(A); the Agency also finalized the residual risk and technology review conducted for the coal- and oil-fired EGU source category regulated under NESHAPs, commonly referred to as the Mercury and Air Toxics Standards (MATS), and did not promulgate any revisions to the MATS rule. 

EPA found that it is not appropriate and necessary to regulate hazardous air pollutant emissions from coal- and oil-fired electric utility steam generating units (EGUs), thereby reversing the Agency's prior conclusion under CAA §112(n)(1)(A); the Agency also finalized the residual risk and technology review conducted for the coal- and oil-fired EGU source category regulated under NESHAPs, commonly referred to as the Mercury and Air Toxics Standards (MATS), and did not promulgate any revisions to the MATS rule. 

EPA found that it is not appropriate and necessary to regulate hazardous air pollutant emissions from coal- and oil-fired electric utility steam generating units (EGUs), thereby reversing the Agency's prior conclusion under CAA §112(n)(1)(A); the Agency also finalized the residual risk and technology review conducted for the coal- and oil-fired EGU source category regulated under NESHAPs, commonly referred to as the Mercury and Air Toxics Standards (MATS), and did not promulgate any revisions to the MATS rule. 

EPA found that it is not appropriate and necessary to regulate hazardous air pollutant emissions from coal- and oil-fired electric utility steam generating units (EGUs), thereby reversing the Agency's prior conclusion under CAA §112(n)(1)(A); the Agency also finalized the residual risk and technology review conducted for the coal- and oil-fired EGU source category regulated under NESHAPs, commonly referred to as the Mercury and Air Toxics Standards (MATS), and did not promulgate any revisions to the MATS rule. 

EPA found that it is not appropriate and necessary to regulate hazardous air pollutant emissions from coal- and oil-fired electric utility steam generating units (EGUs), thereby reversing the Agency's prior conclusion under CAA §112(n)(1)(A); the Agency also finalized the residual risk and technology review conducted for the coal- and oil-fired EGU source category regulated under NESHAPs, commonly referred to as the Mercury and Air Toxics Standards (MATS), and did not promulgate any revisions to the MATS rule.