1. Funded through Florida International University National Institute for Environmental Health Sciences Impacts from CCA-Treated Wood Within Marine and Terrestrial Environments

2. Specific Aims Evaluate the impacts of arsenic from CCA-treated wood by measuring the species of arsenic that are leached from different environmental samples. Develop methods for arsenic speciation in the particulate phase.

3. Laboratory Evaluation (Phase I) – Method Development (Myron) – Leaching Experiments/Soil Column (Bernine) – Data Evaluation Field Evaluation (Phase II) – Deck Sampling (Bernine) – Marine Dock Sampling (Yong) – Data Evaluation Research Design and Methods

4. CCA-Treated Deck Study Bernine Khan University of Miami

5. Two 6-ft x 6-ft wood deck 0.4 pcf CCA treated & untreated (control) 6 ft CCA-Treated Deck Study

6. Deck Study Panels open for soil sampling (arsenic study currently being conducted by FIU-Chemistry (NIEHS) hinge

7. Aluminum Base Decks placed in resin- coated untreated wooden box (8-ft x 8 ft) mounted on aluminum base 5° 8 ft plexiglass 8 ft

8. Resin-coated untreated wooden box Interior lined with plexiglass Set in open environment - rainfall

9. Cross-Section of Layers impervious liner 6” PVC pipe perforated drainfield pipe plexiglass resin-coated box sand

10. Leachate Collection Systems percolating rainwater rainwater runoff

11. Percolating Rainwater Collection System 2-way valve

12. Analyze for arsenic species Rainwater runoff data – estimate how much arsenic & rate of leaching from deck to soil Percolating rainwater – arsenic migration rate through soil Leachate Collection Systems

13. Arsenic Concentration (mg/L) CCA-Treated vs Untreated Deck As(III) As(V) Total Untreated <0.01 mg/L

14. Results After From Nine Rain Events (Sept 16 th – Nov. 25 th ) Total Rainfall – 16 inches Untreated Deck - Rainwater Runoff - <0.01 mg/L - Rainwater Infiltration - < 0.01 mg/L CCA-Treated Deck - Rainwater Runoff - ~ 1.25 mg/L - Rainwater Infiltration - < 0.01 mg/L

15. As(III) As(V) Total Cumulative Arsenic (mg) Rainwater Runoff From CCA-Treated Deck 6 ft

16. Future Soil Column Experiment As(V)As(III) O As(V) O As(III) S As(V) S As(III) O As(V) O As(III) Peristaltic Pump Sand As(III) Sand As(V) Organic As(III) Organic As(V)

17. Soil Felt liner PVC Pipe Column Cross- section Coat of Sand 8 in 4in Measure As Conc. with time

18. ? ? Questions ?