| (a) The owner or operator of each volatile organic compound
(VOC) transfer operation, transport vessel, and marine vessel in the Beaumont/Port
Arthur, Dallas/Fort Worth, El Paso, and Houston/Galveston areas shall comply
with the following control requirements.
(1) General VOC loading. At VOC loading operations other than
gasoline terminals, gasoline bulk plants, and marine terminals, vapors from
the transport vessel caused by the loading of VOC with a true vapor pressure
greater than or equal to 0.5 psia under actual storage conditions must be
controlled by:
(A) a vapor control system which maintains a control efficiency
of at least 90%; or
(B) a vapor balance system, as defined in §115.10 of this
title (relating to Definitions); or
(C) pressurized loading.
(2) Disposal of transported vapors. After unloading, transport
vessels must be kept vapor-tight until the vapors in the transport vessel
are returned to a loading, cleaning, or degassing operation and discharged
in accordance with the control requirements of that operation.
(3) Leak-free requirements. All land-based VOC transfer to
or from transport vessels shall be conducted such that:
(A) All liquid and vapor lines are:
(i) equipped with fittings which make vapor-tight connections
that close automatically when disconnected; or
(ii) equipped to permit residual VOC after transfer is complete
to discharge into a recovery or disposal system which routes all VOC emissions
to a vapor control system or a vapor balance system. After VOC transfer, if
necessary to empty a liquid line, the contents may be placed in a portable
container, which is then closed vapor-tight and disposed of properly.
(B) There are no VOC leaks, as defined in §101.1 of this
title (relating to Definitions), when measured with a hydrocarbon gas analyzer,
and no liquid or vapor leaks, as detected by sight, sound, or smell, from
any potential leak source in the transport vessel and transfer system (including,
but not limited to, liquid lines, vapor lines, hatch covers, pumps, and valves,
including pressure relief valves).
(C) All gauging and sampling devices are vapor-tight except
for necessary gauging and sampling. Any nonvapor-tight gauging and/or sampling
shall:
(i) be limited in duration to the time necessary to practicably
gauge and/or sample; and
(ii) not occur while VOC is being transferred.
(D) Any openings in a transport vessel during unloading are
limited to minimum openings which are sufficient to prevent collapse of the
transport vessel.
(E) If VOC is loaded through the hatches of a transport vessel,
then pneumatic, hydraulic, or other mechanical means shall force a vapor-tight
seal between the loading arm's vapor collection adapter and the hatch. A means
shall be provided which prevents liquid drainage from the loading device when
it is removed from the hatch of any transport vessel, or which routes all
VOC emissions to a vapor control system. After VOC transfer, if necessary
to empty a liquid line, the contents may be placed in a portable container,
which is then closed vapor-tight and disposed of properly.
(4) Gasoline terminals. The following additional control requirements
apply to the transfer of gasoline at gasoline terminals.
(A) A vapor control system must be used to control the vapors
from loading each transport vessel.
(B) Vapor control systems and loading equipment at gasoline
terminals shall be designed and operated such that gauge pressure does not
exceed 18 inches of water and vacuum does not exceed six inches of water in
the gasoline tank-truck.
(C) Each gasoline terminal shall be equipped with sensors and
other equipment designed and connected to monitor the status of the control
device. If the control device malfunctions or is not operational, the system
shall automatically stop gasoline transfer to the transport vessel(s) immediately.
(D) As an alternative to subparagraph (C) of this paragraph,
the following requirements apply to gasoline terminals which have a variable
vapor space holding tank design that can process the vapors independent of
transport vessel loading. Such gasoline terminals shall be equipped with sensors
and other equipment designed and connected to monitor the status of the control
device. If the variable vapor space holding tank serving the loading rack(s)
does not have the capacity to store additional vapors for processing by the
control device at a later time and the control device malfunctions or is not
operational, the system shall automatically stop gasoline transfer to the
transport vessel(s) immediately.
(5) Gasoline bulk plants. The following additional control
requirements apply to transfer of gasoline at gasoline bulk plants.
(A) A vapor balance system must be used between the storage
tank and transport vessel. Alternatively, a vapor control system which maintains
a control efficiency of at least 90% may be used to control the vapors.
(B) While filling a transport vessel from a storage tank:
(i) the transport vessel, if equipped for top loading, must
use a submerged fill pipe; and
(ii) gauge pressure must not exceed 18 inches of water and
vacuum must not exceed six inches of water in the gasoline tank-truck tank.
(6) Marine terminals. The following control requirements apply
to marine terminals in the Houston/Galveston area.
(A) VOC emissions shall not exceed 0.09 pound from the vapor
control system vent per 1,000 gallons (10.8 mg/liter) of VOC loaded into
the marine vessel, or the vapor control system shall maintain a control efficiency
of at least 90%. Alternatively, a vapor balance system or pressurized loading
may be used to control the vapors.
(B) Only leak-free marine vessels, as defined in §115.10
of this title, shall be used for loading operations.
(C) All gauging and sampling devices shall be vapor-tight except
for necessary gauging and sampling. Any nonvapor-tight gauging and/or sampling
shall:
(i) be limited in duration to the time necessary to practicably
gauge and/or sample; and
(ii) not occur while VOC is being transferred.
(D) When non-dedicated loading lines are used to load VOC with
a true vapor pressure less than 0.5 psia (or a flash point of 150 degrees
Fahrenheit or greater) and the preceding transfer through these lines was
VOC with a true vapor pressure equal to or greater than 0.5 psia, the residual
VOC vapors from this preceding transfer must be controlled by the vapor control
system, vapor balance system, or pressurized loading as specified in subparagraph
(A) of this paragraph.
(7) Once-in-always-in. Any loading or unloading operation that
becomes subject to the provisions of this subsection by exceeding provisions
of §115.217(a) of this title (relating to Exemptions) will remain subject
to the provision of this subsection, even if throughput or emissions later
fall below exemption limits unless and until emissions are reduced to no more
than the controlled emissions level existing before implementation of the
project by which throughput or emission rate was reduced to less than the
applicable exemption limits in §115.217(a) of this title; and
(A) the project by which throughput or emission rate was reduced
is authorized by any permit or permit amendment or standard permit or permit
by rule required by Chapter 116 or Chapter 106 of this title (relating to
Control of Air Pollution by Permits for New Construction or Modification;
and Permits by Rule). If a permit by rule is available for the project, compliance
with this subsection must be maintained for 30 days after the filing of documentation
of compliance with that permit by rule; or
(B) if authorization by permit, permit amendment, standard
permit, or permit by rule is not required for the project, the owner/operator
has given the executive director 30 days' notice of the project in writing.
(b) The owner or operator of each land-based VOC transfer operation
and transport vessel in the covered attainment counties shall comply with
the following control requirements.
(1) General VOC loading in Aransas, Bexar, Calhoun, Gregg,
Matagorda, Nueces, San Patricio, Travis, and Victoria Counties. At VOC loading
operations other than gasoline terminals and gasoline bulk plants, vapors
from the transport vessel caused by the loading of VOC with a true vapor pressure
greater than or equal to 1.5 psia under actual storage conditions must be
controlled by:
(A) a vapor control system which maintains a control efficiency
of at least 90%;
(B) a vapor balance system, as defined in §115.10 of this
title; or
Cont'd... |
