ADDITIONAL OPERATING REQUIREMENTS—
LINER SYSTEM
§ 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.
Cross References 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).
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