Lysimeter Study Approach Simulate landfill disposal of CCA 6 PVC Columns 22 feet high, 1-Foot diameter Natural Precipitation or DI water infiltrates through a cap and creates leachate

Disposal Scenarios CCA Monofill Construction and Demolition (C&D) Landfill Municipal Solid Waste (MSW) Landfill

Lysimeters Lysimeter 1 – Untreated wood Lysimeter 2 – CCA: 50% old, 50% new Lysimeter 3 – Typical C&D mix Lysimeter 4 – C&D w/CCA Lyimeter 5 – MSW w/untreated wood Lysimeter 6 – MSW w/CCA

Monitoring Lysimeters began operation on August 28 (Wood, C&D) and September 27, 2001 (MSW) Weekly temperature taken inside the lysimeters at 3 different depths (5, 10, 19 feet from the top of waste) Record volume and characterize gas produced Test gas with Landtec Gem 500 (methane, CO2)

Leachate Collection Collect leachate twice monthly and analyze for general water quality parameters and As, Cu, and Cr

Preliminary Results Weekly Temp monitoring fluctuates with ambient temps Weekly gas monitoring – methane detected up to 60% in MSW lysimeters Leachate generated from all lysimeters Metals found in Lysimeters w/CCA Lys 2 - 9/28/2001 Lys 4 - 6/25/2002 Lys 6 - 7/17/2002

Lysimeter 2 – 100% CCA

Lysimeter 4 – C&D w/ 10% CCA

Lysimeter 6 – MSW w/ 2% CCA

Lysimeter Leachate pH MSW C&D UT Wood CCA

Arsenic

Chromium

Copper

Operation Lysimeters will continue operation through spring and summer DI water added as needed Temp and Gas readings taken weekly Leachate collection twice monthly and continued analysis for general water quality parameters and As, Cu, Cr