Control requirements.

§ 65.42 Control requirements.

(a) For each storage vessel to which this subpart applies, the owner or operator shall comply with the requirements of paragraph (b) or (c) of this section.

(b) For each storage vessel storing a liquid for which the maximum true vapor pressure of the total regulated material in the liquid is less than 76.6 kilopascals (10.9 pounds per square inch), the owner or operator shall reduce regulated material emissions to the atmosphere as provided in any one of the paragraphs (b)(1) through (7) of this section.

(1) Internal floating roof (IFR). Operate and maintain a fixed roof and internal floating roof meeting the requirements of § 65.43.

(2) External floating roof (EFR). Operate and maintain an external floating roof meeting the requirements of § 65.44.

(3) EFR converted to IFR. Operate and maintain an external floating roof converted to an internal floating roof meeting the requirements of § 65.45.

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