Comment submitted by Talen Energy Corporation

Summary: Talen Energy Corporation supports the EPA's proposed rule to rescind CCRMU requirements and revise beneficial use definitions, but argues the rule is insufficient because it fails to revert to historical definitions of "liquids," "free liquids," and "infiltration." The company also urges the EPA to reaffirm that units closed before 2015 are exempt from regulations to prevent frivolous litigation and ensure consistency with state laws.