Status of County Oversight - Lorton Landfill Closure Activities 3-13-2018
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The document provides an update on closure activities at the Lorton Landfill in Fairfax County, Virginia. It summarizes the anticipated closure schedule, which includes continuing waste disposal through 2018, final closure construction from 2019-2020, and post-closure care and monitoring from 2020-2030 or later. It also reviews the proposed closure plan amendments and their conformance with regulatory agency requirements, identifies some public access areas that will be maintained after closure, and provides contact information for additional details.
Status of County Oversight - Lorton Landfill Closure Activities 3-13-2018
- 1. A Fairfax County, VA, publication Department of Public Works and Environmental Services Working for You! Status of County Oversight - Lorton Landfill Closure Activities James Patteson, Director John Kellas, Deputy Director March 13, 2018
- 2. Recycling, Engineering, and Environmental Compliance Solid Waste Management Program Outline • Introductions • Quick Review of SCF Areas of Interest • General Summary of Current Status • Anticipated Closure Schedule • Details – Landfill Operations – Buffering, Landscaping, Screening, etc. – Restoration of Property 2
- 3. Recycling, Engineering, and Environmental Compliance Solid Waste Management Program Introductions • James Patteson - Director, DPWES • John Kellas – DPWES Solid Waste Management Program Lead • William Marsh – Land Development Services • Tom Faha – Virginia DEQ, Northern Regional Director • Richard Doucette - Virginia DEQ, Solid Waste Management Program • Doug Sawyers, P.E. – Sr. Vice-President, Arcadis 3
- 4. Recycling, Engineering, and Environmental Compliance Solid Waste Management Program Anticipated Closure Schedule Throughout the following sequence, DPWES and DEQ will continue to actively regulate the site. • Continue waste disposal until the end of 2018. Concurrently, areas not subject to further waste or cover soil placement seeded and mulched. • 2019 - “Final Closure” begins. Construction of final cap and remaining side-slopes cover, establish vegetative cover, install SEA-required features, where possible. Environmental monitoring and controls continue. • 2019-2020 – licensed P.E. certifies that closure has been completed. Signs and access barriers are installed. Notations on property deed. DEQ inspects the site and confirms that site can enter the “Post- Closure Care” period. • 2020-2030 (at least) – Post-Closure Care. Environmental monitoring and controls continue. Regrading to address differential settlement as needed, as well as repairs and maintenance of structures, ponds, final cover, fences, etc. • 2030 or later – licensed P.E. certifies that Post-Closure Care has been completed. Certification must include an assessment that there is no significant increased risk, should monitoring and maintenance stop. DEQ conducts final inspection, and issues approval to terminate post-closure care. The property is no longer regulated as a landfill 4
- 5. Closure Plan Review – 2006 Plan – Proposed amendments (August 2017) – VDEQ requirements – SEA requirements Recycling, Engineering, and Environmental Compliance Solid Waste Management Program
- 6. Recycling, Engineering, and Environmental Compliance Solid Waste Management Program Proposed Closure Plan - Elevations Max. Fill El. (top of waste) = 412 ft. amsl Max. Final El. (top of final cap) = 420 ft. amsl Reference: Permit Drawings – Closure Plan, Lorton Landfill. August 2017. Prepared by Geosyntec Consultants
- 7. Recycling, Engineering, and Environmental Compliance Solid Waste Management Program Proposed Closure Sequence 2017 & Prior 2018 2019-2020 Reference: Permit Drawings – Closure Plan, Lorton Landfill. August 2017. Prepared by Geosyntec Consultants
- 8. Recycling, Engineering, and Environmental Compliance Solid Waste Management Program Findings – Regulatory Review • Proposed amendments generally in conformance with VDEQ regulatory requirements – Exception: Gas Management Plan (under review by VDEQ) • Positive changes: – Bench spacing reduced – Additional up-gradient groundwater monitoring well – Post-Closure Care/Maintenance – increased inspection frequency
- 9. Findings – SEA Review • Proposed amendments conform to SEA requirements: – Public use features maintained – Modifications made to conform to closure geometry – Exceptions: • Gas venting layer (SEA requirement #23) and gas vents • Alpine Hiking Trail (not identified on SEA Landscaping Plan) Recycling, Engineering, and Environmental Compliance Solid Waste Management Program
- 10. Recycling, Engineering, and Environmental Compliance Solid Waste Management Program Public Access Areas Access Road Parking Sculpture Garden Pavilion Restrooms Amphitheater Overlook Reference: Permit Drawings – Closure Plan, Lorton Landfill. August 2017. Prepared by Geosyntec Consultants Not shown: gates, perimeter/interior trails, picnic areas and certain other features.
- 11. Additional Information For additional information, please contact www.fairfaxcounty.gov/dpwes Recycling, Engineering, and Environmental Compliance Solid Waste Management Program 11 John Kellas Department of Public Works and Environmental Services Solid Waste Management Program 703.324.5230 John.Kellas@fairfaxcounty.gov