[Code of Federal Regulations]

[Title 40, Volume 9]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR63.73]



[Page 94-95]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 63_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR 

SOURCE CATEGORIES--Table of Contents

 

    Subpart D_Regulations Governing Compliance Extensions for Early 

                 Reductions of Hazardous Air Pollutants

 

Sec.  63.73  Source.



    (a) An alternative emission limitation may be granted under this 

subpart to an existing source. For the purposes of this subpart only, a 

source is defined as follows:

    (1) A building structure, facility, or installation identified as a 

source by the EPA in appendix B of this part;

    (2) All portions of an entire contiguous plant site under common 

ownership or control that emit hazardous air pollutants;

    (3) Any portion of an entire contiguous plant site under common 

ownership or control that emits hazardous air pollutants and can be 

identified as a facility, building, structure, or installation for the 

purposes of establishing standards under section 112(d) of the Act; or

    (4) Any individual emission point or combination of emission points 

within a contiguous plant site under common control, provided that 

emission reduction from such point or aggregation of



[[Page 95]]



points constitutes a significant reduction of hazardous air pollutant 

emissions of the entire contiguous plant site.

    (b) For purposes of paragraph (a)(4) of this section, emissions 

reductions are considered significant if they are made from base year 

emissions of not less than:

    (1) A total of 10 tons per year of hazardous air pollutants where 

the total emissions of hazardous air pollutants in the base year from 

the entire contiguous plant site is greater than 25 tons per; or

    (2) A total of 5 tons per year of hazardous air pollutants where the 

total emissions of hazardous air pollutants in the base year from the 

entire contiguous plant site is less than or equal to 25 tons per year.