§ 63.7925 What emissions limitations and work practice standards must I meet for closed vent systems and control devices?
(a) For each closed-vent system and control device you use to comply with requirements in §§ 63.7890 through 63.7922, as applicable to your affected sources, you must meet the emissions limitations and work practice standards in this section.
(b) You must comply with paragraph (b)(2) of this section, and paragraph (b)(1) of this section does not apply, if your initial startup date is after September 3, 2019. If your initial startup date was on or before September 3, 2019, you must comply with paragraph (b)(1) or (2) of this section until January 7, 2021, and after that date, you must comply with paragraph (b)(2) of this section, and paragraph (b)(1) of this section does not apply.
(1) Whenever gases or vapors containing HAP are vented through the closed-vent system to the control device, the control device must be operating except at those times listed in either paragraph (b)(1)(i) or (ii) of this section.
(i) The control device may be bypassed for the purpose of performing planned routine maintenance of the closed-vent system or control device in situations when the routine maintenance cannot be performed during periods that the emission point vented to the control device is shutdown. On an annual basis, the total time that the closed-vent system or control device is bypassed to perform routine maintenance must not exceed 240 hours per each calendar year.
(ii) The control device may be bypassed for the purpose of correcting a malfunction of the closed-vent system or control device. You must perform the adjustments or repairs necessary to correct the malfunction as soon as practicable after the malfunction is detected.
(2) Whenever gases or vapors containing HAP are vented through the closed-vent system to the control device, the control device must be operating, except that the control device on a tank may be bypassed for the purpose of performing planned routine maintenance of the control device. When the tank control device is bypassed, the owner or operator must comply with paragraphs (b)(2)(i) through (iii) of this section.