Arsenic Leaching from Disposed CCA-Treated Wood

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

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

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

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

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