RMMLF Energy Law Newsletter
(By Joseph K. Reinhart, Sean M. McGovern, Gina N. Falaschi and Christina Puhnaty)
On August 21, 2021, the Pennsylvania Department of Environmental Protection (PADEP) issued a draft revision of its technical guidance that explains PADEP’s considerations when evaluating liners and cap systems installed at coal refuse disposal areas pursuant to 25 Pa. Code chs. 86, 88, and 90. See PADEP, Draft TGD No. 563-2112-656, “Liners and Caps for Coal Refuse Disposal Areas” (Aug. 21, 2021) (Draft TGD). These systems of liners and protective caps, called “barrier layers,” are intended to prevent adverse impacts to groundwater and surface water and to prevent precipitation from coming into contact with coal refuse by preventing or reducing water migration through the refuse material. See 25 Pa. Code §§ 90.50(a)–(b), .101–.102, .122. As noted in the preamble for the rulemaking that established section 90.50(b), “[t]his statutory requirement was intended to ensure that precipitation contacting the coal refuse is kept to a minimum, thereby reducing the volume of water needing treatment after the site is closed.” 31 Pa. Bull. 3735, 3736 (July 14, 2001). PADEP noted that this draft technical guidance document, when finalized, would not mandate that existing structures be replaced or retrofitted.
PADEP’s current guidance serves as a guide for the use of liners for impoundments, stockpiles, and coal refuse disposal areas. See PADEP, TGD No. 563-2112-656, “Liners and Caps for Coal Refuse Disposal Areas” (July 17, 2021). PADEP’s draft revision of this technical guidance is significantly different from the current guidance in that the revised draft guidance incorporates protective caps and emphasizes PADEP’s preference for barrier layers constructed using synthetic material rather than clay. …