What is the slurry of material that seeps to the bottom of a landfill called?
The term for the liquid at the bottom of a landfill is
"leachate". It consists of anything soluble in water or any
solvents in the waste. Leachate is very nasty stuff and the goal of
landfill design is ways to minimize the entry of water to reduce
leachate generation. It is typically acidic and contains metals in
solution, along with organics of all types.