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Field Scale Deck Study. Untreated wood. CCA-treated wood. 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 - PowerPoint PPT Presentation
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Field Scale Deck Field Scale Deck StudyStudy
1Tomoyuki Shibata, 1Helena M. Solo-Gabriele, 2Young Cai, and 3Timothy
Townsend1University of Miami, 2Florida International University, and
3University of Florida
Objective: Environmental assessment
on in-service CCA-treated wood
Untreated wood
CCA-treated wood
Experimental Set-upExperimental Set-up
sandy soil, 60 cm
Deck
gravel
Infiltrated water
Runoff leachate
rain
Materials & Methods
Rainfall Runoff leachate
Soil Infiltrated water
Monitoring Monitoring since September 2002since September 2002
Rain gauge
AnalysesAnalysesMaterials & Methods
Water samples
Soil
AA
Environmental Engineering LaboratoryUniversity of Miami
Ground surface
Rainfall< 0.001 mg/L for As and Cr
Runoff leachate
Results &Discussions
Runoff LeachateRunoff Leachate
0.001
0.010
0.100
1.000
10.000
9/1
4/0
2
11
/14
/02
1/1
4/0
3
3/1
4/0
3
5/1
4/0
3
7/1
4/0
3
9/1
4/0
3
11
/14
/03
1/1
4/0
4
3/1
4/0
4
5/1
4/0
4
7/1
4/0
4
9/1
4/0
4
11
/14
/04
1/1
4/0
5
3/1
4/0
5
5/1
4/0
5
Date (mm/dd/yy)
Ru
no
ff l
ea
ch
ate
(m
g/L
)
As (mg/L)
Cr (mg/L)
1st year 2nd year 3rd year
Guidelines: 0.1 (Cr) 0.05 (As)
Results &Discussions
0 2 4 6 8 10 12 14 16 18
Cumulative arsenic in soil (mg/kg)
Surface ~ 2.5
2.5 ~ 5.0
5.0 ~ 7.5
7.5 ~ 10.0
(cm
)
Ground surface
after 6 months
after 6 months
after 13 months
after 6 months
after 13 months
after 18 months
after 6 months
after 13 months
after 18 months
after 24 months
after 6 months
after 13 months
after 18 months
after 24 months
after 30 months
60.0
?
Rainfall
Runoff leachate
Results &Discussions
FL SCTL residential
2.1 mg/kg
FL SCTL Industrial
12 mg/kg
Infiltrated WaterInfiltrated Water
0.000
0.010
0.020
0.030
0.040
0.050
0.060
0.070
0.080
0.090
0.100
9/14
/200
2
11/1
4/20
02
1/14
/200
3
3/14
/200
3
5/14
/200
3
7/14
/200
3
9/14
/200
3
11/1
4/20
03
1/14
/200
4
3/14
/200
4
5/14
/200
4
7/14
/200
4
9/14
/200
4
11/1
4/20
04
1/14
/200
5
3/14
/200
5
5/14
/200
5
Date (mm/dd/yy)
Infi
ltra
ted
wat
er (
mg
/L)
As (mg/L)
Cr (mg/L)
1st year
2nd year
3rd year
Guidelines: 0.1 (Cr)
Guidelines:0.05 (As)
Results &Discussions
Mass BalanceMass Balance
(%) from the CCA deck(%) from the CCA deck
Results &Discussions
Runoff Runoff leachateleachate
yearyear AsAs CrCr
11 88 0.80.8
2 2 1111 1.31.3
2.8 2.8 1313 1.51.5
Infiltrated Infiltrated waterwater
AsAs CrCr
0.10.1 0.10.1
0.50.5 0.10.1
0.80.8 0.10.1Most As leached was Most As leached was
captured in the top soilcaptured in the top soil
Acknowledgements Acknowledgements
Funding Funding FL Center for Solid & Hazardous FL Center for Solid & Hazardous
Waste Management Waste Management National Institute for Environmental National Institute for Environmental
Health Science (Grant #211 ES Health Science (Grant #211 ES 11181)11181)
Extra helpExtra help Dr. Wimal Suaris, Gary JacobiDr. Wimal Suaris, Gary Jacobi, Tara Fishbain, , Tara Fishbain,
Caitlin Feikle, Geoff Klug, Colleen Block, Yuki Caitlin Feikle, Geoff Klug, Colleen Block, Yuki Sotome, and Alicia Muniz: University of MiamiSotome, and Alicia Muniz: University of Miami
Thank youAny questions?
