USEPA Plans to Regulate GHGs via the CAA
June 6, 2010
Last month the USEPA recently issued its long-awaited “tailoring” rule, its attempt to use the Clean Air Act (CAA) to regulate emissions of greenhouse gases (GHGs) from stationary sources (see www.epa.gov/nsr/actions).
The USEPA will use existing Prevention of Significant Deterioration (PSD, found in 40 CFR Part 52.21) and Title V Permitting (40 CFR Part 70) rules to regulate GHG emissions in a phased approach. From Jan. 1, 2011 until June 30, 2011, facilities currently subject to PSD permitting (new large sources or existing ones seeking a significant net increase in emissions of a regulated pollutant other than GHGs) will be subject to PSD if it proposes to raise CO2e emission rates by at least 75,000 tpy. Such sources will need to demonstrate the inclusion of Best Available Control Technology (BACT) to minimize GHG emissions. BACT, determined case-by-case, is the most stringent emission control technology taking economic (cost effectiveness), energy, and environmental impacts into consideration. Title V Operating Permits issued during this period must address any relevant regulatory requirements applied to GHGs. From July 1, 2011 until July 30, 2013, PSD permits will be required for any new facility with the potential to emit at least 100,000 tpy or an existing facility proposing to raise emissions by at least 75,000 tpy of CO2e even if it does not meet the threshold for any current PSD-regulated compounds. Also during this period, Title V Operating Permits must be obtained by any facility with a potential to emit of at least 100,000 tpy of CO2e even if emissions of no other compound exceed its Title V threshold. The USEPA has stated its desire to reduce these thresholds in the future to 50,000 tpy of CO2e beginning in 2016.
Many states are delegated the review and issuance of PSD and Title V Permits. Thus, there was much comment from the states about this ruling. The USEPA notes that even the reduced future threshold is higher than the proposed draft 2009 threshold of 25,000 tpy. The USEPA raised the thresholds in response to these comments.
Implementing CAA rules to address GHG emissions is very controversial. The CAA was written to address emissions of compounds that have direct health or environmental effects and whose ambient concentrations are changeable. Reducing GHG emissions significantly has no impact on local CO2 ambient concentrations. Therefore, many feel that while reducing GHG emissions is a worthy effort, this is a flawed approach; we should wait for legislation specific to the unique characteristics of climate change. Others feel that this is a good stopgap measure that does not tax industry while specific legislation is debated, as it is unknown when and if such legislation will ever pass. Majority Leader Reid has said he wants to press forward with hearings this summer to develop a bill, likely a hybrid of the House Waxman-Markey and Senate Kerry-Lieberman bills. At the same time, there is consideration in the Senate of a bill to prevent the USEPA from applying CAA rules on GHGs from stationary sources.
Climate Change & Environmental Services (www.CCESworld.com) can help you prepare for these changes and help you prepare PSD and Title V permits for GHGs.
Posted: June 6th, 2010 under Uncategorized.
Tags: clean air act, climate change, EPA, greenhouse gases, PSD
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