1. Arsenic Leaching from Disposed CCA-Treated Wood

2. Disposal Leaching Method: Lysimeter Study
catchment basin
treatment
plant railing
Wood Monofill
Untreated/Control – Lys 1
100% CCA – Lys 2
C&D
Untreated/Control – Lys 3
10% CCA – Lys 4
MSW
Untreated/Control – Lys 5
2% CCA – Lys 6
12 in.
steel
strapping
waste
20 ft
steel support post
drainage
material
concrete blocks
concrete pad
ground level

6. Wood Monofill Lysimeters Cumulative
As Speciation
Control
Total = 1 mg
Total 1400 mg
DMAA
As(V)
As(III)
MMAA

7. Lysimeters Cumulative As Speciation
C&D
Lysimeters Cumulative
As Speciation
Control
Total 2.5 mg
DMAA
As(V)
As(III)
MMAA
Total 120 mg

8. Lysimeters Cumulative As Speciation
MSW
Lysimeters Cumulative
As Speciation
Control
Total 18 mg
DMAA
As(V)
As(III)
MMAA
Total 85 mg

9. Lysimeters 2 MSW / 2 C&D / 2 Monofill Untreated/Control (mg/L)
CCA-Treated
Wood Monofill
< 0.02
5 – 43
As(III),As(V)
C&D Waste
<0.06
0.4 – 1.8
As(III), As(V), DMA, MMA
MSW
< 0.7
0.4 – 2.3