| (5) An external floating roof storage tank storing
waxy, high pour point crude oils is exempt from any secondary seal
requirements of §115.112(b) of this title.
(6) A welded storage tank storing VOC with a true vapor
pressure less than 4.0 psia is exempt from any external secondary
seal requirement if any of the following types of primary seals were
installed before August 22, 1980:
(A) a mechanical shoe seal;
(B) a liquid-mounted foam seal; or
(C) a liquid-mounted liquid filled type seal.
(7) A welded storage tank storing crude oil with a
true vapor pressure equal to or greater than 4.0 psia and less than
6.0 psia is exempt from any external secondary seal requirement if
any of the following types of primary seals were installed before
December 10, 1982:
(A) a mechanical shoe seal;
(B) a liquid-mounted foam seal; or
(C) a liquid-mounted liquid filled type seal.
(8) A storage tank with storage capacity less than
or equal to 1,000 gallons is exempt from the requirements of this
division.
(c) The following exemptions apply in Aransas, Bexar,
Calhoun, Matagorda, San Patricio, and Travis Counties. The exemptions
in this subsection no longer apply in Bexar County beginning January
1, 2025.
(1) A storage tank storing VOC with a true vapor pressure
less than 1.5 psia is exempt from the requirements of this division.
(2) Slotted guidepoles installed in a floating roof
storage tank are exempt from the provisions of §115.112(c) of
this title.
(3) A storage tank with storage capacity between 1,000
gallons and 25,000 gallons is exempt from the requirements of §115.112(c)(1)
of this title if construction began before May 12, 1973.
(4) A storage tank with storage capacity less than
or equal to 420,000 gallons is exempt from the requirements of §115.112(c)(3)
of this title.
(5) A storage tank with storage capacity less than
or equal to 1,000 gallons is exempt from the requirements of this
division.
|
| Source Note: The provisions of this §115.111 adopted to be effective December 29, 2011, 36 TexReg 8862; amended to be effective June 25, 2015, 40 TexReg 3907; amended to be effective March 26, 2020, 45 TexReg 2003; amended to be effective July 21, 2021, 46 TexReg 4313; amended to be effective May 16, 2024, 49 TexReg 3292 |
