Current through Register Vol. 39, No. 6, September 16, 2024
(a) For the purpose
of this Rule, the following definitions apply:
(1) "Bulk gasoline terminal" means:
(A) a pipeline breakout station of an
interstate oil pipeline facility; or
(B) a gasoline storage facility that
typically receives gasoline from refineries primarily by pipeline, ship, or
barge; delivers gasoline to bulk gasoline plants or to commercial or retail
accounts primarily by cargo tank; and has an average daily throughput of more
than 20,000 gallons of gasoline.
(2) "Cargo tank" means the storage vessels of
freight trucks or trailers used to transport gasoline from sources of supply to
stationary storage tanks of bulk gasoline terminals, bulk gasoline plants,
gasoline dispensing facilities, and gasoline service stations.
(3) "Contact deck" means a deck in an
internal floating roof tank that rises and falls with the liquid level and
floats in direct contact with the liquid surface.
(4) "Degassing" means the process by which a
tank's interior vapor space is decreased to below the lower explosive limit for
the purpose of cleaning, inspection, or repair.
(5) "Gasoline" means a petroleum distillate
having a Reid Vapor Pressure (RVP) of 4.0 psi or greater.
(6) "Leak" means a crack or hole letting
petroleum product vapor or liquid escape that is identifiable through sight,
sound, smell, an explosimeter, or the use of a meter that measures volatile
organic compounds. When an explosimeter or meter is used to detect a leak, a
leak is a measurement that is equal to or greater than 100 percent of the lower
explosive limit, as detected by a combustible gas detector using the test
procedure described in Appendix B of EPA-450/2-78-051. This test procedure is
incorporated by reference, including any subsequent amendments and editions. A
copy of this test procedure may be obtained free of charge at
https://nepis.epa.gov/Exe/ZyPDF.cgi/2000M9RD.PDF?Dockey=2000M9RD.PDF.
(7) "Liquid balancing" means a process used
to degas floating roof gasoline storage tanks with a liquid whose vapor
pressure is below 1.52 psi. This is done by removing as much gasoline as
possible without landing the roof on its internal supports, pumping in the
replacement fluid, allowing mixing, removing as much mixture as possible
without landing the roof, and repeating these steps until the vapor pressure of
the mixture is below 1.52 psi.
(8)
"Liquid displacement" means a process by which gasoline vapors remaining in an
empty tank are displaced by a liquid with a vapor pressure below 1.52
psi.
(9) "Pipeline breakout
station" means a facility along a pipeline containing storage tanks used to:
(A) relieve surges in a hazardous liquid
pipeline system; or
(B) receive and
store hazardous liquids transported by pipeline for reinjection and continued
transport by pipeline.
For the purposes of this definition, "hazardous liquid"
means the materials listed in
49 CFR
195.2.
(b) This Rule applies to bulk gasoline
terminals and the appurtenant equipment necessary to load the cargo tank
compartments.
(c) Gasoline shall
not be loaded into any cargo tank from any bulk gasoline terminal unless:
(1) the bulk gasoline terminal is equipped
with a vapor control system that prevents the emissions of volatile organic
compounds from exceeding 35 milligrams per liter. The owner or operator shall
obtain from the manufacturer and maintain in the cargo tank's records a
pre-installation certification stating the vapor control efficiency of the
system in use;
(2) displaced vapors
and gases are vented only to the vapor control system or to a flare;
(3) a means is provided to prevent liquid
drainage from the loading device when it is not in use or to accomplish
complete drainage before the loading device is disconnected; and
(4) all loading and vapor lines are equipped
with fittings that make vapor-tight connections and that are automatically and
immediately closed upon disconnection.
(d) Sources regulated by this Rule shall not:
(1) allow gasoline to be discarded in sewers
or stored in open containers or handled in any manner that would result in
evaporation; or
(2) allow the
pressure in the vapor collection system to exceed the cargo tank pressure
relief settings.
(e) The
owner or operator of a bulk gasoline terminal shall paint all tanks used for
gasoline storage white or silver.
(f) The owner or operator of a bulk gasoline
terminal shall install on each external floating roof tank with an inside
diameter of 100 feet or less used to store gasoline a self-supporting roof,
such as a geodesic dome.
(g) The
following equipment shall be required on all tanks storing gasoline at a bulk
gasoline terminal:
(1) rim-mounted secondary
seals on all external and internal floating roof tanks;
(2) gaskets on deck fittings; and
(3) floats in the slotted guide poles with a
gasket around the cover of the poles.
(h) Decks shall be required on all above
ground tanks with a capacity greater than 19,800 gallons storing gasoline at a
bulk gasoline terminal. All decks installed after June 30, 1998 shall comply
with the following requirements:
(1) deck
seams shall be welded, bolted, or riveted; and
(2) seams on bolted contact decks and on
riveted contact decks shall be gasketed.
(i) If, upon facility or operational
modification of a bulk gasoline terminal that existed before December 1, 1992,
an increase in benzene emissions results such that:
(1) emissions of volatile organic compounds
increase by more than 25 tons cumulative at any time during the five years
following modifications; and
(2)
annual emissions of benzene from the cluster, which includes the bulk gasoline
terminal, the pipeline, and marketing terminals served by the pipeline, exceed
benzene emissions from that cluster based upon calendar year 1991 gasoline
throughput and application of the requirements of this Subchapter, then, the
annual increase in benzene emissions due to the modification shall be offset
within the cluster by reduction in benzene emissions beyond that otherwise
achieved from compliance with this Rule, in the ratio of at least 1.3 to
1.
(j) To qualify for
exemption from the requirements under Paragraphs (e) through (i) of this Rule,
the owner or operators of a bulk gasoline terminal that received an air quality
permit before December 1, 1992 to emit toxic air pollutants under
15A NCAC
02Q .0700 to comply with
15A NCAC
02D .1100 shall continue to follow all terms
and conditions of the permit issued under
15A NCAC
02Q .0700 and to bring the terminal into
compliance with
15A NCAC
02D .1100 according to the terms and
conditions of the permit, and shall maintain this permit to emit toxic air
pollutants.
(k) The owner or
operator of a bulk gasoline terminal shall not load, or allow to be loaded,
gasoline into any cargo tank unless the cargo tank has been certified leak
tight according to
15A NCAC
02D .0932.
(l) The owner or operator of a bulk gasoline
terminal shall have on file at the terminal a copy of the certification test
conducted according to
15A NCAC
02D .0932 for each gasoline cargo tank loaded
at the terminal.
(m) Emissions of
gasoline from degassing of external or internal floating roof tanks at a bulk
gasoline terminal shall be collected and controlled by at least 90 percent by
weight. Liquid balancing shall not be used to degas gasoline storage tanks at
bulk gasoline terminals. Bulk gasoline storage tanks containing not more than
138 gallons of liquid gasoline or the equivalent of gasoline vapor and gasoline
liquid are exempted from the degassing requirements if gasoline vapors are
vented for at least 24 hours. Documentation of degassing external or internal
floating roof tanks shall be made according to
15A NCAC
02D .0903.
(n) The owner or operator of a bulk gasoline
terminal shall visually inspect the following for leaks each day that the
terminal is both manned and open for business:
(1) the vapor collection system;
(2) the vapor control system; and
(3) each lane of the loading rack while a
gasoline cargo tank is being loaded.
In accordance with
15A NCAC
02D .1903, the owner or operator shall
maintain records of the visual inspections. If no leaks are found, the owner or
operator shall record that no leaks were found. If a leak is found, the owner
or operator shall record the information specified in Paragraph (p) of this
Rule. The owner or operator shall repair all leaks found according to Paragraph
(q) of this Rule.
(o) The owner or operator of a bulk gasoline
terminal shall inspect weekly for leaks:
(1)
the vapor collection system;
(2)
the vapor control system; and
(3)
each lane of the loading rack while a gasoline cargo tank is being loaded.
The weekly inspection shall be done using sight, sound, or
smell; a meter used to measure volatile organic compounds; or an explosimeter.
An inspection using either a meter used to measure volatile organic compounds
or an explosimeter shall be conducted every month. If no leaks are found, the
owner or operator shall record the date that the inspection was done and that
no leaks were found. If a leak is found, the owner or operator shall record the
information specified in Paragraph (p) of this Rule. The owner or operator
shall repair all leaks found according to Paragraph (q) of this
Rule.
(p) For each
leak found under Paragraph (n) or (o) of this Rule, the owner or operator of a
bulk gasoline terminal shall record:
(1) the
date of the inspection;
(2) the
findings detailing the location, nature, and severity of each leak;
(3) the corrective action taken;
(4) the date when corrective action was
completed; and
(5) any other
information that the terminal deems necessary to demonstrate compliance with
this Rule.
(q) The owner
or operator of a bulk gasoline terminal shall repair all leaks as follows:
(1) The vapor collection hose that connects
to the cargo tank shall be repaired or replaced before another cargo tank is
loaded at that rack after a leak has been detected originating with the
terminal's equipment rather than from the gasoline cargo tank.
(2) All other leaks shall be repaired as
expeditiously as possible but no later than 15 days from their detection. If
more than 15 days are required to make the repair, the reasons that the repair
cannot be made shall be documented, and the leaking equipment shall not be used
after the fifteenth day from when the leak detection was found until the repair
is made.
Authority
G.S.
143-215.3(a)(1);
143-215.107(a)(5);
Eff. July 1, 1979;
Amended Eff. January 1, 2007; April 1, 2003;
August 1, 2002; July 1, 1998; July 1, 1996; July 1, 1994; December 1, 1992;
December 1, 1989; January 1, 1985;
Readopted Eff. November 1,
2020.
