Note: EPA no longer updates this information, but it may be useful as a reference or resource.
Please see www.epa.gov/nsr/ for the latest information on EPA's New Source Review program.
July 28, 1987 Letter Concerning Best Available Control Technology (BACT) Determinations 8.20
1) The role of NSPS in BACT
determinations - describes the
reasons why BACT determinations
almost always should be more
stringent than NSPS for any given
2) The relationship between BACT and air quality impacts - BACT is a specific requirement for a PSD permit regardless of air quality impact or amount of increment consumed, provided all else was acceptable.