25 Pa. Code § 129.57
The provisions of this section apply to above ground stationary storage tanks with a capacity equal to or greater than 2,000 gallons which contain volatile organic compounds with vapor pressure greater than 1.5 psia (10.5 kilopascals) under actual storage conditions. Storage tanks covered under this section shall have pressure relief valves which are maintained in good operating condition and which are set to release at no less than .7 psig (4.8 kilopascals) of pressure or .3 psig (2.1 kilopascals) of vacuum or the highest possible pressure and vacuum in accordance with state or local fire codes or the National Fire Prevention Association guidelines or other national consensus standards acceptable to the Department. Section 129.56(g) (relating to storage tanks greater than 40,000 gallons capacity containing VOCs) applies to this section. Petroleum liquid storage vessels which are used to store produced crude oil and condensate prior to lease custody transfer shall be exempt from the requirements of this section.
25 Pa. Code § 129.57
The provisions of this § 129.57 issued under section 1920-A of The Administrative Code of 1929 (71 P.S. § 510-20); and section 5 of the Air Pollution Control Act (35 P.S. § 4005).
This section cited in 25 Pa. Code § 129.51 (relating to general); 25 Pa. Code § 129.54 (relating to seasonal operation of auxiliary incineration equipment); 25 Pa. Code § 129.91 (relating to control of major sources of NOx and VOCs); 25 Pa. Code § 129.96 (relating to applicability); and 25 Pa. Code § 129.111 (relating to applicability).