Section 63.486 - Batch front-end process vent provisions(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 §§ 63.487 through 63.492 . The batch front-end process vent group status shall be determined in accordance with § 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 § 63.487 , the monitoring requirements in § 63.489 , the performance test methods and procedures to determine compliance in § 63.490 , the recordkeeping requirements in § 63.491 , and the reporting requirements in § 63.492 . Owners and operators of all Group 2 batch front-end process vents shall comply with the applicable reference control technology requirements in § 63.487 , the applicable recordkeeping requirements in § 63.491 , and the applicable reporting requirements in § 63.492 .(b)Aggregate batch vent streams. Aggregate batch vent streams, as defined in § 63.482 , are subject to the control requirements specified in § 63.487(b) , as well as the monitoring, testing, recordkeeping, and reporting requirements specified in §§ 63.489 through 63.492 for aggregate batch vent streams.65 FR 38052, June 19, 2000