(a) Batch front-end process vents. Except as specified in paragraph (b) of this section, owners and operators of new and existing affected sources with batch front-end process vents shall comply with the requirements in Secs. 63.487 through 63.492. The batch front-end process vent group status shall be determined in accordance with Sec. 63.488. Owners or operators of affected sources with batch front-end process vents classified as Group 1 shall comply with the reference control technology requirements for Group 1 batch front-end process vents in Sec. 63.487, the monitoring requirements in Sec. 63.489, the performance test methods and procedures to determine compliance in Sec. 63.490, the recordkeeping requirements in Sec. 63.491, and the reporting requirements in Sec. 63.492. Owners and operators of all Group 2 batch front-end process vents shall comply with the applicable reference control technology requirements in Sec. 63.487, the applicable recordkeeping requirements in Sec. 63.491, and the applicable reporting requirements in Sec. 63.492.
(b) Aggregate batch vent streams. Aggregate batch vent streams, as defined in Sec. 63.482, are subject to the control requirements specified in Sec. 63.487(b), as well as the monitoring, testing, recordkeeping, and reporting requirements specified in Secs. 63.489 through 63.492 for aggregate batch vent streams. [65 FR 38052, June 19, 2000]