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The Pennsylvania Code website reflects the Pennsylvania Code changes effective through 54 Pa.B. 1806 (March 30, 2024).

25 Pa. Code § 290.406. Storage piles—storage pad or liner system.

§ 290.406. Storage piles—storage pad or liner system.

 (a)  A person that installs a storage pad or liner system to prevent groundwater degradation shall meet the requirements of this section. This section does not preclude a person from using other means to prevent groundwater degradation, such as enclosure in a building.

 (b)  The storage pad or liner system must meet the following requirements:

   (1)  Prevent the migration of leachate through the storage pad or liner system.

   (2)  May not be adversely affected by the physical or chemical characteristics of coal ash, coal ash constituents or leachate from the coal ash storage piles.

   (3)  Be designed, constructed and maintained to protect the integrity of the pad or liner during the storage of coal ash.

   (4)  Be designed to collect leachate and runoff.

   (5)  Be constructed of nonsolid waste and noncoal ash material.

   (6)  Be no less permeable than 1 x 10-7 cm/sec., as demonstrated by field and laboratory testing.

   (7)  Be inspected for uniformity, damage and imperfections during construction and installation.

 (c)  The person shall install and operate a monitoring system capable of verifying whether coal ash or leachate has penetrated the pad or liner, if required by the Department.

 (d)  Coal ash may not be stored where continuous or intermittent contact could occur between the coal ash and groundwater or surface water.

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