Environmental Alert
(by Donald Bluedorn and Gary Steinbauer)
On April 12, 2019, the Fifth Circuit Court of Appeals issued a decision in Southwestern Electric Power Company, et al. v. EPA, addressing pending claims in consolidated petitions challenging the U.S. Environmental Protection Agency’s revised effluent limitations guidelines for the Steam Electric Power Generating Point Source Category (ELGs). The Opinion vacated the “legacy” wastewater and “combustion residual leachate” best available technology economically achievable (BAT) standards promulgated by EPA in 2015. A copy of the Opinion is available here: http://www.ca5.uscourts.gov/opinions/pub/15/15-60821-CV0.pdf.
Under the Clean Water Act (CWA), EPA is responsible for establishing nationwide technology-based standards to govern discharges of pollutants by specific industrial categories. See 33 U.S.C. § 1314(b). In November 2015, EPA promulgated revisions to the ELGs after a multi-year study of wastewater management and treatment technologies used by steam-electric power plants since the ELGs were last revised in 1982. EPA revised the ELGs to regulate six separate wastewater streams: (1) flue gas desulfurization (FGD) wastewater; (2) fly ash transport wastewater; (3) bottom ash transport wastewater (BATW); (4) flue gas mercury control wastewater; (5) combustion residual leachate (leachate); and (6) gasification wastewater. In addition, the ELGs regulate “legacy” wastewater, which consists of one or more of the above-referenced wastewater streams (commingled or separate) if they are generated before the date determined by the state permitting authority. For leachate and “legacy” wastewaters, EPA selected impoundments as BAT-level controls. By contrast, EPA affirmatively rejected surface impoundments as BAT for the other five wastewater streams and imposed limits based on other forms of wastewater treatment or management.
In granting the environmental groups’ challenge to the BAT “legacy” wastewater limits in the ELGs, the Court repeatedly emphasized what it felt was a false distinction that EPA created between “legacy” wastewater and the other wastewater streams regulated under the ELGs. …
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