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• February 26, 2009

Since 1988, more than 6,100 municipal solid waste (MSW) landfills have closed (see http://www.epa.gov/msw/pubs/mswchar05.pdf). Determining when the regulatory post-closure care (PCC) period can be ended for a permitted solid waste disposal facility is one of the greatest challenges facing the solid waste industry in recent times. Using a performance-based process, conducted on a site-specific basis, to determine if a closed landfill poses a threat to human health and the environment provides information necessary to defensibly conclude that the closed landfill does not pose a threat and allows termination of the regulatory post-closure care period.

This training, based on ITRC's Technical and Regulatory Guidance: Evaluating, Optimizing, or Ending Post-Closure Care at Municipal Solid Waste Landfills Based on Site-Specific Data Evaluations (ALT-4, 2006), describes a method to evaluate the performance of Post Closure Care at a landfill and determine when leachate recovery, landfill gas management, groundwater monitoring, and cap maintenance can be reduced or even ended based on threats (to human health and the environment) posed by the closed landfill. The training and document describe "custodial care" as those requirements the property owner must follow after post closure care has been ended. They include de minimus site management and care activities including meeting end-use obligations, maintaining institutional control, controlling access, satisfying local ordinances, and fulfilling other applicable regulations and are included as deed restrictions or other enforceable means which follow all land transfers. The training and document focus on Post Closure Care of municipal solid waste landfills. However, Post Closure Care is relevant to closed sites and facilities managed in accordance with a variety of regulatory programs including RCRA, CERCLA, Solid Waste, Brownfields, Voluntary Cleanup, mined land reclamation, and others. Solid waste professionals and other landfill decision makers (e.g. owners; operators; consultants; Federal, state and local government; and the public) should attend this training.

• Charles Johnson, Colorado Department of Public Health and Environment (charles.johnson@state.co.us)
• Mike Houlihan, P.E., GeoSyntec Consultants (mhoulihan@geosyntec.com)
• Ed Wosika, California State Water Resources Control Board (ewosika@waterboards.ca.gov)

• Mary Yelken, ITRC Training Program Support (myelken@theyelkengroup.com)
• Juliana Cheatham, ITRC Training Program Support (jcheatham@theyelkengroup.com)

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