Soil Survey: Methodology Improvement in Brazil Adopted by CTR-RIO for the Quality Control of Geomembrane Installations

摘要

The soil survey methodology is used for the detection of leaks in geomembranes. Although little known in Brazil, it is well suited to minimize the risk of placing waste on a damaged liner system. A Canadian study indicates that the density of damages on installed geomembranes is on average between 4 and 22 leaks per hectare. Quality Control measures currently used in Brazilian landfills do not include this type of testing. As the existence of lined landfills is relatively new in Brazil, the impact caused by damage in the protective layers cannot be perceived. The Landfill of CTR-RIO, in Rio de Janeiro, Brazil adopted this methodology for quality control. The results after 4 years of operation indicated the amount of leaks found range between 0.5 and 8 leaks per hectare for an inspected area of approximately 310,000 m~2. All identified damages could be repaired before the beginning of the waste disposal.