Current through Register Vol. 54, No. 25, June 22, 2024
Section 289.431 - Scope and requirements(a) A person or municipality operating a Class I residual waste disposal impoundment shall design, construct, operate and maintain a liner system for disposal areas of a residual waste disposal impoundment or components thereof under this section and §§ 289.432-289.439.(b) The liner system for a Class I residual waste disposal impoundment shall include the following elements: (1) The subbase, which is the prepared layer of soil or earthen materials upon which the remainder of the liner system is constructed.(2) The secondary liner, which is a continuous layer of synthetic materials or remolded clay placed on the subbase.(3) The leachate detection zone, which is a prepared layer placed on top of the secondary liner and upon which the primary liner is placed, and in which a leachate detection system is located.(4) The primary liner, which is a continuous layer of synthetic materials placed on the leachate detection zone.(5) The protective cover and leachate collection zone, which is a prepared layer placed over the primary liner in which a leachate collection system is located.(c) Either the primary liner or the secondary liner shall be a composite liner, which is a continuous layer of synthetic materials over earthen materials. 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 § 289.412 (relating to liner system and leachate control plan); and 25 Pa. Code § 289.421 (relating to basic limitations).