"When there are high temperatures in the landfill gas, that can melt or deform some of the landfill gas collection system components," PVC which was used for t

"When there are high temperatures in the landfill gas, that can melt or deform some of the landfill gas collection system components," PVC which was used for the gas collection system systems at ~200F, hardly a high temperature. Melting occurs at about 350F. However, garbage fires are a fairly common occurrence, which begs the question why PVC, which itself produces very toxic pyrolysis and combustion products, was used in the first place.