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Title 40

Displaying title 40, up to date as of 7/14/2026. Title 40 was last amended 7/14/2026.
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Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter ISolid Wastes239 – 299
Part 257Criteria for Classification of Solid Waste Disposal Facilities and Practices257.1 – 257.107
Subpart DStandards for the Disposal of Coal Combustion Residuals in Landfills and Surface Impoundments257.50 – 257.107
§ 257.50Scope and purpose.
§ 257.51 [Reserved]
§ 257.52Applicability of other regulations.
§ 257.53Definitions.
Location Restrictions257.60 – 257.64
§ 257.60Placement above the uppermost aquifer.
§ 257.61Wetlands.
§ 257.62Fault areas.
§ 257.63Seismic impact zones.
§ 257.64Unstable areas.
Design Criteria257.70 – 257.75
§ 257.70Design criteria for new CCR landfills and any lateral expansion of a CCR landfill.
§ 257.71Liner design criteria for existing CCR surface impoundments.
§ 257.72Liner design criteria for new CCR surface impoundments and any lateral expansion of a CCR surface impoundment.
§ 257.73Structural integrity criteria for existing CCR surface impoundments.
§ 257.74Structural integrity criteria for new CCR surface impoundments and any lateral expansion of a CCR surface impoundment.
§ 257.75Requirements for identifying CCR management units.
Operating Criteria257.80 – 257.84
§ 257.80Air criteria.
§ 257.81Run-on and run-off controls for CCR landfills.
§ 257.82Hydrologic and hydraulic capacity requirements for CCR surface impoundments.
§ 257.83Inspection requirements for CCR surface impoundments.
§ 257.84Inspection requirements for CCR landfills.
Groundwater Monitoring and Corrective Action257.90 – 257.98
§ 257.90Applicability.
§ 257.91Groundwater monitoring systems.
§ 257.92 [Reserved]
§ 257.93Groundwater sampling and analysis requirements.
§ 257.94Detection monitoring program.
§ 257.95Assessment monitoring program.
§ 257.96Assessment of corrective measures.
§ 257.97Selection of remedy.
§ 257.98Implementation of the corrective action program.
Closure and Post-Closure Care257.100 – 257.104
§ 257.100Inactive CCR surface impoundments and Legacy CCR surface impoundments.
§ 257.101Closure or retrofit of CCR units.
§ 257.102Criteria for conducting the closure or retrofit of CCR units and closure of CCR management units.
§ 257.103Alternative closure requirements.
§ 257.104Post-closure care requirements.
Recordkeeping, Notification, and Posting of Information to the Internet257.105 – 257.107
§ 257.105Recordkeeping requirements.
§ 257.106Notification requirements.
§ 257.107Publicly accessible internet site requirements.