Pennsylvania Code › Title 25 - ENVIRONMENTAL PROTECTION › Part I - Department of Environmental Protection › Subpart C - Protection of Natural Resources › Article III - Air Resources › Chapter 121 - GENERAL PROVISIONS › Section 121.1 - Definitions

Current through Register Vol. 54, No. 28, July 13, 2024
The definitions in section 3 of the act (35 P.S. §
												4003) apply to this article. In addition, the
						following words and terms, when used in this article, have the following
						meanings, unless the context clearly indicates otherwise:
ABS welding adhesive
or
acrylonitrile-butadiene-styrene welding adhesive
- An adhesive
						intended by the manufacturer to weld acrylonitrile-butadiene-styrene (ABS)
						pipe, which is made by reacting monomers of acrylonitrile, butadiene and
						styrene.
Ablative coating
-A coating that chars
						when exposed to open flame or extreme temperatures, as would occur during the
						failure of an engine casing or during aerodynamic heating. The ablative char
						surface serves as an insulating barrier, protecting adjacent components from
						the heat or open flame.
Account
-The place in the
						NOx allowance tracking system where allowances are
						recorded including allowances held by a NOx affected
						source.
Account number
-The identification number
						given by the NOx budget administrator to an account in
						which NOx allowances are held in the NOx
						allowance tracking system.
Acquiring account
-The party in a
						NOx allowance transfer who obtains NOx
						allowances through purchase, trade, auction, gift or another lawful
						means.
Act
-The Air Pollution Control Act
						(35
						P. S. §§
												4001-4015).
Actual emissions
-For purposes of Chapter
						127, Subchapter E (relating to new source review), the actual rate of emissions
						of a regulated NSR pollutant from an emissions unit shall be determined in
						accordance with the following subparagraphs. This definition does not apply for
						calculating whether a significant emissions increase has occurred, or for
						establishing a PAL under
						127.218 (relating to PALs).
						Instead, the definition of the terms "projected actual emissions" and "baseline
						actual emissions" apply for those purposes.
This definition may not be used to calculate a baseline
						emissions rate under
						127.207(4)
						(relating to creditable emissions decrease or ERC generation and
						creation).
(i) Actual emissions as of
					 a particular date must equal the average rate, in TPY, at which the unit
					 actually emitted the regulated NSR pollutant during the consecutive 24-month
					 period which immediately preceded the particular date and which is
					 representative of normal source operations. The Department will authorize the
					 use of a different time period upon a determination that it is more
					 representative of normal source operation. Actual emissions shall be calculated
					 using the unit's actual operating hours, production rates and types of
					 materials processed, stored or combusted during the selected time
					 period.
(ii) For an emissions unit
					 that has not begun normal operations on the particular date, actual emissions
					 equal the potential to emit of the unit on that date.
Actual PAL for a major facility
-A PAL
						based on the baseline actual emissions of all emissions units at a major
						facility that emit or have the potential to emit the PAL pollutant.
Adhesion promoter
-A very thin coating
						applied to an aerospace vehicle or component substrate to promote wetting and
						to form a chemical bond with the subsequently applied material.
Adhesive
-
(i) A chemical substance that is applied for
					 the purpose of bonding two surfaces together other than by mechanical
					 means.
(ii) The term does not
					 include coatings or finishing materials.
Adhesive bonding primer
-A primer applied
						in a thin film to aerospace components for the purpose of corrosion inhibition
						and increased adhesive bond strength by attachment. There are two categories of
						adhesive bonding primers:
(i) Primers
					 with a design cure at 250°F or below.
(ii) Primers with a design cure above
					 250°F.
Adhesive primer
-
(i) A product intended by the manufacturer
					 for application to a substrate, prior to the application of an adhesive, to
					 provide a bonding surface.
(ii) For
					 purposes of
					 129.73 (relating to aerospace
					 manufacturing and rework), a coating applied to an aerospace vehicle or
					 component that does one of the following:
(A)
					 Inhibits corrosion and serves as a primer when applied to bare metal or other
					 surfaces prior to adhesive application.
(B) Is applied to surfaces that can be
					 expected to contain fuel, with the exception of fuel tanks.