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Landfill Mining and Materials Processing for Beneficial Use : A Case Study

Landfill Mining and Materials Processing for Beneficial Use : A Case Study Billy Newcomb, Draper Aden Associates -and- Michael T. Dorsey, Fauquier County. Virginia Location. Facility. Fauquier County. Facilities. Landfill #575. Recycling Center. Landfill #149. C&D Recycling Facility.

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Landfill Mining and Materials Processing for Beneficial Use : A Case Study

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  1. Landfill Mining and Materials Processing for Beneficial Use: A Case Study Billy Newcomb, Draper Aden Associates -and- Michael T. Dorsey, Fauquier County

  2. Virginia Location Facility Fauquier County

  3. Facilities Landfill #575 Recycling Center Landfill #149 C&D Recycling Facility

  4. Sanitary Landfill #149 1993 - Liability or Asset? Closure Post-Closure Liability 1.3 Million CY Unused Landfill Capacity VA HB1205 Vertical Expansion Accept Regional C&D Asset

  5. 2005 - #149 Landfill Reaching Capacity Decision Point Revenue Loss Terminate Regional C&D Waste Accept Regional C&D Waste Subtitle D Landfill Permit #575 Landfill Capacity Loss Continue Regional C&D Waste Disposal at #149 Extreme Recycling

  6. Closure vs. Extreme Recycling (Landfill Mining + Recycling + Piggyback)

  7. Landfill Mining and Beneficial Uses

  8. Landfill Mining/Piggyback Cross Section Line Area Mining Landfill Expansion

  9. Mining/Piggyback Schematic Cross Section Final MSW Piggyback Elevation 2006 Top C&D Fill Mining Project Piggyback Base Grade MSW

  10. Mining and Processing Operations

  11. Excavation Operators Pre-Screen Material Metal Inert

  12. PowerScreen™ Separating Mined Materials

  13. Large Materials are Further Sorted for Recycling

  14. Intermediates (2 to 5-inch) – Still Wrestling with Processing this Material

  15. Fines – Alternate Daily and Intermediate Cover

  16. Beneficial Use of Fines (Limitations)

  17. Chemical Characterization of Fines

  18. Passive Attenuation of TPH in Fines

  19. Physical Characteristics of Fines for Alternate Cover • No Odor Complaints (Initially Concerned about Putrescible Content and Hydrogen Sulfide) • No Observed Employee Respiratory or Other Health Symptoms • Less Erosion Compared to Soils • Equipment Traction was Excellent • No Blowing Litter or Scavenging and Disease Vectors • Dust Suppression was Required • Vegetative Ability was Lacking; Relatively High pH (7 to 8 range)

  20. Fines Applied for Intermediate Cover

  21. Fines Resist Erosion in Rain Processed Fines Cover Soil Cover

  22. Fines Intermediate Cover – Vegetation

  23. Landfill Mining Pilot Operating Efficiency

  24. Conclusion – Questions? Thank you! for more information, please contact: Billy Newcomb, P.G. Draper Aden Associates bnewcomb@daa.com

  25. Regulatory Path for Mining and Fines Evaluation • 2005 Master Plan • 2006 C&D Recycling Facility Operational • 2007 - Landfill Mining Proof of Concept • VDEQ Concerned with Disposition of Fines, Testing Frequency and Acceptable Quality • 2010 - VDEQ approved Mining Permit Amendment with Beneficial Use Demonstration (BUD) • 2011-2013 - Evaluate Mining Operations Efficiency, Chemical Characteristics of Fines, Physical Characteristics of Fines

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