The readings of gas pressure inside the waste heaps show that the system of gas drainage has been efficient, which is also shown by the constant combustion at all the flares in the landfill. However, it is not possible to assess the loss (or escape) of gases through the surface. As to the composition of the gases generated in the former rubbish heap, monitoring shows that it is similar to the gases generated in sanitary landfills for solid urban waste in regions of tropical climate, as shown in Table
6.