| (a) Applicability. Except as specified in §115.111
of this title (relating to Exemptions), this division applies to any
storage tank in which volatile organic compounds are placed, stored,
or held that is located in:
(1) the Beaumont-Port Arthur area, as defined in §115.10
of this title (relating to Definitions);
(2) the Dallas-Fort Worth area, as defined in §115.10
of this title;
(3) the El Paso area, as defined in §115.10 of
this title;
(4) the Houston-Galveston-Brazoria area, as defined
in §115.10 of this title; and
(5) Aransas, Bexar, Calhoun, Gregg, Matagorda, Nueces,
San Patricio, Travis, and Victoria Counties.
(b) Definitions. Unless specifically defined in the
Texas Clean Air Act (Texas Health and Safety Code, Chapter 382) or
in §§3.2, 101.1, or 115.10 of this title (relating to Definitions,
respectively), the terms in this division have the meanings commonly
used in the field of air pollution control. In addition, the following
meanings apply in this division unless the context clearly indicates
otherwise.
(1) Closure device--A piece of equipment that covers
an opening in the roof of a fixed roof storage tank and either can
be temporarily opened or has a component that provides a temporary
opening. Examples of closure devices include, but are not limited
to, thief hatches, pressure relief valves, pressure-vacuum relief
valves, and access hatches.
(2) Deck cover--A device that covers an opening in
a floating roof deck. Some deck covers move horizontally relative
to the deck (i.e., a sliding cover).
(3) Flexible enclosure system--A system that includes
all of the following: a flexible device that completely encloses the
slotted guidepole and eliminates the hydrocarbon vapor emission pathway
from inside the tank through the guidepole slots to the outside air;
a guidepole cover at the top of the guidepole; and a well cover positioned
at the top of the guidepole well that seals any openings between the
well cover and the guidepole (e.g., pole wiper), any openings between
the well cover and any other objects that pass through the well cover,
and any other openings in the top of the guidepole well.
(4) Incompatible liquid--A liquid that is a different
chemical compound, a different chemical mixture, a different grade
of liquid material, or a fuel with different regulatory specifications
provided that the chemical compound, chemical mixture, grade of liquid
material, or fuel would be unusable for its intended purpose due to
contamination from the previously stored liquid.
(5) Internal sleeve emission control system--An emissions
control system that includes all of the following: an internal guidepole
sleeve that eliminates the hydrocarbon vapor emission pathway from
inside the tank through the guidepole slots to the outside air; a
guidepole cover at the top of the guidepole; and a well cover positioned
at the top of the guidepole well that seals any openings between the
well cover and the guidepole (e.g., pole wiper), any openings between
the well cover and any other objects that pass through the well cover,
and any other openings in the top of the guidepole well.
(6) Pipeline breakout station--A facility along a pipeline
containing storage vessels used to relieve surges or receive and store
crude oil or condensate from the pipeline for reinjection into the
pipeline and continued transportation by pipeline or to other facilities.
(7) Pole float--A float located inside a guidepole
that floats on the surface of the stored liquid. The rim of the float
has a wiper or seal that extends to the inner surface of the pole.
(8) Pole sleeve--A device that extends from either
the cover or the rim of an opening in a floating roof deck to the
outer surface of a pole that passes through the opening. The sleeve
must extend into the stored liquid.
(9) Pole wiper--A seal that extends from either the
cover or the rim of an opening in a floating roof deck to the outer
surface of a pole that passes through the opening.
(10) Slotted guidepole--A guidepole or gaugepole that
has slots or holes through the wall of the pole. The slots or holes
allow the stored liquid to flow into the pole at liquid levels above
the lowest operating level.
(11) Storage capacity--The volume of a storage tank
as determined by multiplying the internal cross-sectional area of
the tank by the average internal height of the tank shell.
(12) Storage tank--A stationary vessel, reservoir,
or container used to store volatile organic compounds. This definition
does not include: components that are not directly involved in the
containment of liquids or vapors; subsurface caverns or porous rock
reservoirs; or process tanks or vessels.
(13) Tank battery--A collection of equipment used to
separate, treat, store, and transfer crude oil, condensate, natural
gas, and produced water. A tank battery typically receives crude oil,
condensate, natural gas, or some combination of these extracted products
from several production wells for accumulation and separation prior
to transmission to a natural gas plant or petroleum refinery. A collection
of storage tanks at a pipeline breakout station, petroleum refinery,
or petrochemical plant is not considered to be a tank battery.
(14) Vapor recovery unit--A device that transfers hydrocarbon
vapors to a fuel liquid or gas system, a sales liquid or gas system,
or a liquid storage tank.
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