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

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

3. Recycled Wood Contains CCA
6% in (12 C&D facilities)
9 to 30% in (3 C&D facilities)
22% in (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
Samples
No.
No. Exceeding GWCTL for As
No. Exceeding GWCTL for Cr
C&D Debris 20 18 5
Yard Waste 3 1
Colored Mulch 2
Vegetative 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

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

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

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

19. Questions?

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

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

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

23. 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

24. Questions ?