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Extent of CCA-Treated Wood Used for Commercial Mulch

Extent of CCA-Treated Wood Used for Commercial Mulch. Progress to Date. Mulch. Co-mingled C&D Waste. Wood With CCA. C&D MRF. Wood Cogeneration. Unlined C&D Landfill. Current Disposal Pathways. Recycled Wood Contains CCA. 6% in 1996 (12 C&D facilities)

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Extent of CCA-Treated Wood Used for Commercial Mulch

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  1. Extent of CCA-Treated Wood Used for Commercial Mulch Progress to Date

  2. Mulch Co-mingled C&D Waste Wood With CCA C&D MRF Wood Cogeneration Unlined C&D Landfill Current Disposal Pathways

  3. Recycled Wood Contains CCA • 6% in 1996 (12 C&D facilities) • 9 to 30% in 1999 (3 C&D facilities) • 22% in 2001 (1 C&D facility)

  4. CCA-Treated Wood Difficult to Sort Visually

  5. Mulch: Major Market for Recycled Wood

  6. Recycled Wood Mulch Is Typically Dyed

  7. Uses of Recycled Wood Mulch

  8. Uses of Recycled Mulch

  9. Uses of Recycled Mulch

  10. How to Recognize Recycled Wood Mulch

  11. News Coverage • Mini-study by news media • Many inquiries from concerned citizens • Some samples sent to the research team • Some contained CCA and others did not

  12. Leaching Characteristics of Mulch

  13. Objectives • Quantify the extent to which mulch in south Florida is contaminated with CCA • Determine the adequacy of visual methods in establishing whether or not a mulch sample contains CCA.

  14. Methods • Sample collection – Completed ~ 34 samples collected 22 mulches from retail establishments 5 from playgrounds 2 from schools 2 soil/wood blends 3 controls

  15. Unburned Visual Inspect Stain SPLP Sample Ashed ICP/AA Analysis “Fraction of CCA” Methods • Sample Preprocessing & Analysis 8 samples ashed to date

  16. Timeline • Complete sample collection by Nov’02 • “ pre-processing by Jan’03 • “ analysis by July’03

  17. Technical Results • Study will characterize mulch sold at commercial establishments and mulch in use • Leachability  SPLP • Fraction of CCA in mulch • Visual Characteristics

  18. Questions?

  19. Recently Funded Management and Disposal Options for CCA-Treated Wood Waste

  20. Purpose • Prioritize feasible management and disposal options for CCA-treated wood

  21. Unlined C&D Landfill Mulch Air Emissions Wood Cogeneration Ash Disposal Air Emissions WTE Plant Ash Disposal Recycled Wood with CCA Co-Mingled C&D Waste C&D MRF Untreated Wood Re-use or Recycle Add’l Sorting Sort at Source Air Emissions Volume Reduction- incineration Ash Disposal CCA Treated Wood Ultimate Disposal Recycling Disposal in a Lined Landfill

  22. Methods • Document current management scenarios for CCA-treated wood in FL • Document current quality of FL water, air, and soil. • Describe existing disposal facilities. • Evaluate environmental impacts of current disposal pathways and alternative scenarios

  23. Questions ?

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