Changes

Testing is done manually using a portable vapor analyzer that read in parts per million (ppm). Monitoring frequency, and the leak threshold, is determined by various factors such as the type of component being tested and the chemical running through the line. Moving components such as pumps and agitators are monitored more frequently than non-moving components such as flanges and screwed connectors. The regulations require that when a leak is detected the component be repaired within a set amount of days. Most facilities get 5 days for an initial repair attempt with no more than 15 days for a complete repair. Allowances for delaying the repairs beyond the allowed time are made for some components where repairing the component requires shutting process equipment down.<ref name="ldar"/>

In April 2007, the US Supreme Court extended the Clean Air Act to included global warming pollution. The court said in [[Massachusetts v. EPA]], 549 U.S. 497 (2007) that the EPA violated the Clean Air act by not regulating greenhouse gas emissions, the major contributor to [[climate change]].<ref>Robert Barnes and Juliet Eilperin, [http://www.washingtonpost.com/wp-dyn/content/article/2007/04/02/AR2007040200487.html "High Court Faults EPA Inaction on Emissions"] The Washington Post, April 3, 2007.</ref>

The Inhofe-Upton bill allows many Clean Air Act programs to continue, but takes away the agency’s authority to apply the landmark law to carbon dioxide. A deal negotiated with automakers to limit carbon dioxide emissions from cars and light trucks would be allowed to stand through 2016, but no further greenhouse gas emissions rules for vehicles would be permitted. State programs to try to address global warming and carbon emissions would be allowed to continue.<ref name=jb/>

===Judge forces EPA to address haze rule in four Western states===