| (a) The owner or operator of each volatile organic
compound (VOC) transfer operation, transport vessel, and marine vessel
in the Beaumont-Port Arthur, Bexar County, Dallas-Fort Worth, El Paso,
and Houston-Galveston-Brazoria 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-Brazoria 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
as defined by §115.10 of this title (relating to Definitions)
shall comply with the following control requirements.
(1) General VOC loading in Aransas, Bexar, Calhoun,
Gregg, Matagorda, Nueces, San Patricio, Travis, and Victoria Counties.
The requirements of this paragraph no longer apply in Bexar County
beginning January 1, 2025. 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... |
