Section 63.7907 - What are my inspection and monitoring requirements for surface impoundments?(a) If you use a floating membrane cover according to § 63.7905(b)(1) , you must visually inspect the floating membrane cover and its closure devices at least annually according to the requirements in § 63.946(a) .(b) If you use a cover vented to a control device according to § 63.7905(b)(2) , you must meet requirements in paragraphs (b)(1) and (2) of this section. (1) You must visually inspect the cover and its closure devices for defects according to the requirements in § 63.946(b) .(2) You must monitor and inspect the closed vent system and control device according to the requirements in § 63.7927 that apply to you.