1. Field Scale Deck Study 1 Tomoyuki Shibata, 1 Helena M. Solo-Gabriele, 2 Young Cai, and 3 Timothy Townsend 1 University of Miami, 2 Florida International University, and 3 University of Florida Objective: Environmental assessment on in-service CCA-treated wood Untreated wood CCA-treated wood

2. Experimental Set-up sandy soil, 60 cm Deck gravel Infiltrated water Runoff leachate rain

3. Materials & Methods RainfallRunoff leachate SoilInfiltrated water Monitoring since September 2002  Rain gauge

4. Analyses Materials & Methods Water samples Soil AA Environmental Engineering Laboratory University of Miami

5. Ground surface Rainfall < 0.001 mg/L for As and Cr Runoff leachate Results & Discussions

6. Runoff Leachate  1 st year  2 nd year  3 rd year  Guidelines: 0.1 (Cr) 0.05 (As) Results & Discussions

7. Ground surface 60.0 ? Rainfall Runoff leachate Results & Discussions FL SCTL residential 2.1 mg/kg FL SCTL Industrial 12 mg/kg

8. Infiltrated Water  1 st year  2 nd year  3 rd year  Guidelines: 0.1 (Cr) Guidelines: 0.05 (As) Results & Discussions

9. Mass Balance (%) from the CCA deck (%) from the CCA deck Results & Discussions Runoff leachate yearAsCr 180.8 2111.3 2.8131.5 Infiltrated water AsCr 0.10.1 0.50.1 0.80.1 Most As leached was captured in the top soil

10. Acknowledgements Funding FL Center for Solid & Hazardous Waste Management FL Center for Solid & Hazardous Waste Management National Institute for Environmental Health Science (Grant #211 ES 11181) National Institute for Environmental Health Science (Grant #211 ES 11181) Extra help Dr. Wimal Suaris, Gary Jacobi, Tara Fishbain, Caitlin Feikle, Geoff Klug, Colleen Block, Yuki Sotome, and Alicia Muniz: University of Miami Dr. Wimal Suaris, Gary Jacobi, Tara Fishbain, Caitlin Feikle, Geoff Klug, Colleen Block, Yuki Sotome, and Alicia Muniz: University of Miami

11. Thank you Any questions?