Virginia Administrative Code
Title 9 - ENVIRONMENT
Agency 5 - STATE AIR POLLUTION CONTROL BOARD
Chapter 40 - EXISTING STATIONARY SOURCES
Part II - Emission Standards
Article 25 - Emission Standards for Volatile Organic Compound Storage and TransferOperations (Rule 4-25)
Section 9VAC5-40-3430 - Standard for volatile organic compounds
Universal Citation: 9 VA Admin Code 9VAC5-40-3430
Current through Register Vol. 41, No. 3, September 23, 2024
A. Filling of storage tanks.
1. No owner or other person shall use or
permit the use of any stationary storage tank for storage of any volatile
organic compound unless such tank is equipped with a control method that will
remove, destroy or prevent the discharge into the atmosphere of at least 60% by
weight of volatile organic compound emissions during the filling of such
tank.
2. Achievement of the
emission standard in subsection A 1 of this section by use of the methods in
9VAC5-40-3440 A will be acceptable
to the board.
3. Exempted from the
provisions of this subsection are stationary storage tanks with a storage
capacity of 2,000 gallons or less.
B. Volatile organic compound storage - fixed roof tanks.
1. No owner or other person shall
use or permit the use of any fixed roof tank for storage of volatile organic
compounds unless such tank is equipped with a control method which will remove,
destroy or prevent the discharge into the atmosphere of at least 90% by weight
of volatile organic compound emissions.
2. Achievement of the emission standard in
subsection B 1 of this section by use of control methods in
9VAC5-40-3440 B will be acceptable
to the board.
3. Exempted from the
provisions of this subsection are stationary storage tanks with a storage
capacity of 40,000 gallons or less.
4. The owner of a fixed roof tank subject to
the provisions of subsection B 1 of this section shall:
a. When the fixed roof tank is equipped with
an internal floating roof, perform a visual inspection annually of the floating
cover through the roof hatches, to ascertain compliance with the specifications
in subsection B 4 (1) and (2).
(1) The cover
should be uniformly floating on or above the liquid and there should be no
visible defects in the surface of the cover or liquid accumulated on the
cover.
(2) The seal must be intact
and uniformly in place around the circumference of the cover between the cover
and tank wall.
b.
Perform a complete inspection of the cover and seal and record the condition of
the cover and seal when the tank is emptied for nonoperational reasons such as
maintenance, an emergency, or other similar purposes.
c. Maintain records of the average monthly
storage temperature and true vapor pressure of the liquid as stored, and the
results of the inspection performed under the provisions of subsection B 4 a
and b of this section.
C. Volatile organic compound storage - floating roof tanks.
1. No owner or other
person shall use or permit the use of any floating roof tank for storage of
volatile organic compounds, unless such tank is equipped with a control method
which will remove, destroy or prevent the discharge into the atmosphere of at
least 90% by weight of volatile organic compound emissions.
2. Achievement of the emission standard in
subsection C 1 of this section by use of methods in
9VAC5-40-3440 C will be acceptable
to the board.
3. Exempted from the
provisions of this subsection are stationary storage tanks with a storage
capacity of 40,000 gallons or less.
4. The owner of a floating roof tank subject
to the provisions of subsection C 1 of this section shall:
a. Perform routine inspections annually which
shall include a visual inspection of the secondary seal gap.
b. When the floating roof is equipped with a
vapor-mounted primary seal, measure the secondary seal gap annually in
accordance with subsections C 4 b (1) and (2) of this section.
(1) Physically measuring the length and width
of all gaps around the entire circumference of the secondary seal in each place
where a 1/8 inch uniform diameter probe passes freely (without forcing or
binding against the seal) between the seal and tank wall; and
(2) Summing the area of the individual
gaps.
c. Maintain
records of the types of volatile organic compounds stored, the maximum true
vapor pressure of the liquid as stored, and the results of the inspections
performed under the provisions of subsection C 4 a and b of this
section.
Statutory Authority
§§ 10.1-1307 and 10.1-1308 of the Code of Virginia.
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