25 Pa. Code § 289.451
A person or municipality operating a Class I residual waste disposal impoundment shall comply with this section and § § 289.452—289.457.
This section cited in 25 Pa. Code § 287.114 (relating to interim operational requirements for unpermitted processing or disposal facilities); 25 Pa. Code § 287.116 (relating to interim operational requirements); 25 Pa. Code § 289.413 (relating to leachate treatment plan); and 25 Pa. Code § 289.421 (relating to basic limitations).