CCR Rule Compliance Data and Information

Liberty Utilities closed the Asbury coal plant in spring of 2020. An impoundment is located at the former Asbury site for coal combustion residuals (CCR). As required by the Environmental Protection Agency's CCR Rule, this page provides information related to compliance, inspections and actions regarding the impoundment.

What are Coal Combustion Residuals (CCR)?

Coal combustion residuals are the materials that remain after pulverized coal is burned to generate electricity. There are several different types of materials produced including:

Fly Ash - a very fine, powdery material composed mostly of silica which "flies" up into the stack with flue gases and is removed by electrostatic precipitators and fabric filter baghouses.

Bottom Ash and boiler slag - coarse particles that are too large to be carried up into the stack, so they settle to the bottom of the combustion chamber.

Flue Gas Desulfurization Material (FGD) - a material leftover from the process of reducing sulfur dioxide emissions from a coal-fired boiler.

These materials have a wide range of beneficial uses in the construction, manufacturing, environmental remediation and other industries. Those not recycled for beneficial use are stored in utility impoundments. 

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CCR Rule