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.

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Presentation transcript:

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

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

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

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

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

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

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

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

Mass Balance (%) from the CCA deck (%) from the CCA deck Results & Discussions Runoff leachate yearAsCr Infiltrated water AsCr Most As leached was captured in the top soil

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

Thank you Any questions?