Texas Administrative Code › Title 30 - ENVIRONMENTAL QUALITY › Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY › Chapter 115 - CONTROL OF AIR POLLUTION FROM VOLATILE ORGANIC › Subchapter B - GENERAL VOLATILE ORGANIC COMPOUND SOURCES › Division 1 - STORAGE OF VOLATILE ORGANIC COMPOUNDS › Section 115.112 - Control Requirements

Current through Reg. 49, No. 28; July 12, 2024
(a) The
					 following requirements apply in the Beaumont-Port Arthur, Dallas-Fort Worth,
					 and El Paso areas, as defined in §
											115.10 of
					 this title (relating to Definitions). The control requirements in this
					 subsection no longer apply in the Dallas-Fort Worth area beginning March 1,
					 2013.
(1) No person shall place, store, or
					 hold in any storage tank any volatile organic compounds (VOC) unless the
					 storage tank is capable of maintaining working pressure sufficient at all times
					 to prevent any vapor or gas loss to the atmosphere or is in compliance with the
					 control requirements specified in Table I(a) of this paragraph for VOC other
					 than crude oil and condensate or Table II(a) of this paragraph for crude oil
					 and condensate.
Attached
						Graphic
(2) For
					 an external floating roof or internal floating roof storage tank subject to the
					 provisions of paragraph (1) of this subsection, the following requirements
					 apply.
(A) All openings in an internal
					 floating roof or external floating roof except for automatic bleeder vents
					 (vacuum breaker vents) and rim space vents must provide a projection below the
					 liquid surface or be equipped with a cover, seal, or lid. Any cover, seal, or
					 lid must be in a closed (i.e., no visible gap) position at all times except
					 when the device is in actual use.
(B) Automatic bleeder vents (vacuum breaker
					 vents) must be closed at all times except when the roof is being floated off or
					 landed on the roof leg supports.
(C) Rim vents, if provided, must be set to
					 open only when the roof is being floated off the roof leg supports or at the
					 manufacturer's recommended setting.
(D) Any roof drain that empties into the
					 stored liquid must be equipped with a slotted membrane fabric cover that covers
					 at least 90% of the area of the opening.
(E) There must be no visible holes, tears, or
					 other openings in any seal or seal fabric.
(F) For an external floating roof storage
					 tank, secondary seals must be the rim-mounted type (the seal must be continuous
					 from the floating roof to the tank wall). The accumulated area of gaps that
					 exceed 1/8 inch in width between the secondary seal and storage tank wall may
					 not be greater than 1.0 square inch per foot of tank diameter.
(3) Vapor control systems, as
					 defined in §
												115.10 of
					 this title, used as a control device on any storage tank must maintain a
					 minimum control efficiency of 90%. If a flare is used, it must be designed and
					 operated in accordance with 40 Code of Federal Regulations §60.18(b) - (f)
					 (as amended through December 22, 2008 (73 FR 78209)) and be lit at all times
					 when VOC vapors are routed to the flare.