Key parameters of concern are carbon monoxide, hydrogen sulphide, volatile organics.
However, this oxygen suppression method can be compromised if cracks develop in the soil cover due to settlement.
Nearby streams can be threatened by leachate pools which may form if water is used to extinguish fires in landfills.
for this reason, recirculation of fire fighting water should be considered to minimize environmental impacts.
Normally this liner prevents harmful liquids contained within the landfill from escaping into the groundwater and nearby streams.