Dumpsite Remediation

Uncontrolled dumpsites,especially those on which open burning is allowed in an attempt to reduce volume and control odors, are among the most significant sources of environmental pollution in developing countries.

Open burning of a single 50 gallon barrel of domestic waste in someone's back yard results in more emission of criteria pollutants into the atmosphere than a full day's operation of a 50 MW gas fired power plant.

 

 Legacy dumping of municipal solid waste or construction and demolition waste in unlined landfills, in the US and elsewhere, can give rise to large plots of contaminated soil, sometimes in areas that have increased in land values since the dumping occurred. (The three lower images the left show the EPR engineered and monitored remediation of a contaminated construction and demolition waste dumpsite on land that has since risen substantially in value.)

In these cases, the dumped material must be excavated and separated, with the contaminated material hauled to a lined landfill. Oversized material must be crushed to size. Clean fill is then placed back into the excavated area in layers and thoroughly compacted.

Municipal solid waste landfill sites, even if lined and well managed, can still represent a resource for renewable fuel for electrical power generation by gasification. In order to extend the service life of lined landfills by reducing waste volume, it is often economically viable to recover combustible waste from these for use as renewable fuel.

As illustrated in the images to the left, remediation of sites with improprerly dumped or managed materials can be accomplished using modern equipment including excavators, vibrating screens, trommel screens, air flow (air knife) separation, crushers, compactors and, in some cases, a final hand sorting.

EPR engineers have experience the survey, evaluation, and remediation of legacy dumpsites. In most cases, these sites can be excavated with contaminated material being properly disposed in a lined landfill, and cleaned material being properly sized and replaced, along with clean topsoil, to return the site to pristine condition.