A simple method to check for natural attenuation downstream of abandoned waste disposal sites
Evaluations of waste sites are based on the assessment of whether conditions for Natural Attenuation (NA) processes are favourable. A method is proposed as a first check for effects of NA in the groundwater emissions. For the application of the method, concentrations of the concerned substance and of a tracer must be available at observation wells at different distances from the source, preferably along a flowpath of the waste site. The method is demonstrated at waste sites, with TOC as proxy for a degradable component. The method can be recommended within a priority programme for NA-remediation on landfills.
Keywords: waste disposal, natural attenuation, tracers, modelling, TOC, waste site evaluation, groundwater emissions, landfill remediation, total organic carbon, environmental pollution