Louisiana Administrative Code › Title 33 - ENVIRONMENTAL QUALITY › Part III - Air › Chapter 21 - Control of Emission of Organic Compounds › Subchapter A - General › Section III-2103 - Storage of Volatile Organic Compounds

Current through Register Vol. 50, No. 6, June 20, 2024
A. No person shall place, store, or hold in
				  any stationary tank, reservoir, or other container of more than 250 gallons
				  (950 liters) and up to 40,000 gallons (151,400 liters) nominal capacity any
				  volatile organic compound, having a maximum true vapor pressure of 1.5 psia or
				  greater at storage conditions, unless such tank, reservoir, or other container
				  is designed and equipped with a submerged fill pipe or a vapor loss control
				  system, as defined in Subsection E of this Section, or is a pressure tank
				  capable of maintaining working pressures sufficient at all times under normal
				  operating conditions to prevent vapor or gas loss to the atmosphere.
B. No person shall place, store, or hold in
				  any stationary tank, reservoir, or other container of more than 40,000 gallons
				  (151,400 liters) nominal capacity any volatile organic compound having a
				  maximum true vapor pressure of 1.5 psia or greater at storage conditions unless
				  such tank, reservoir, or other container is a pressure tank capable of
				  maintaining working pressures sufficient at all times under normal operating
				  conditions to prevent vapor or gas loss to the atmosphere or is designed and
				  equipped with a submerged fill pipe and one or more of the vapor loss control
				  devices described in Subsections C, D, and E of this Section.
C. Internal Floating Roof. An internal
				  floating roof consists of a pontoon type roof, double deck type roof, or
				  internal floating cover which will rest or float on the surface of the liquid
				  contents and is equipped with a closure seal to close the space between the
				  roof edge and tank wall. All tank gauging and sampling devices shall be gas
				  tight except when gauging or sampling is taking place. If the organic compounds
				  have a vapor pressure of 11.0 psia or greater under actual storage conditions,
				  the requirements of Subsection F of this Section shall supersede the
				  requirements of this Subsection. In the parishes of Ascension, Calcasieu, East
				  Baton Rouge, Iberville, Livingston, Pointe Coupee, and West Baton Rouge, the
				  following additional requirements apply:
1.
				  The closure seal shall consist of either:
a.
				  a liquid mounted seal consisting of a foam- or liquid-filled seal mounted in
				  contact with the liquid between the wall of the storage vessel and the floating
				  roof continuously around the circumference of the tank;
b. a mechanical shoe seal (metallic-type shoe
				  seal) consisting of a metal sheet held vertically against the wall of the
				  storage vessel by springs or weighted levers and connected by braces to the
				  floating roof. A flexible coated fabric (envelope) spans the annular space
				  between the metal sheet and the floating roof; or
c. two seals mounted one above the other so
				  that each forms a continuous closure that completely covers the space between
				  the wall of the storage vessel and the edge of the internal floating roof. The
				  lower seal may be vapor-mounted, but both must be continuous.