Enviromental aspects of Brownfield Regeneration Barbara Vojvodíková, Marcela Maturová „This project has been funded with support from the European Commission. This publication [communication] reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.“
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Enviromental aspects of Brownfield Regeneration
Barbara Vojvodíková, Marcela Maturová
„This project has been funded with support from the European Commission. This publication [communication] reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the
information contained therein.“
Contents
• Contaminated site term definition• Enviromental brownfield assessment procedure• Sampling steps• Decontamination methods classification• Decontamination methods examples
• The term 'contaminated site' refers to a well delimited area where the presence of soil contamination has been confirmed. The severity of the impacts to ecosystems and human health can be such that remediation is needed, specifically in relation to the current or planned use of the site.
Potentially contaminated site
• The term "potentially contaminated site" includes any site where soil contamination is suspected but not verified and detailed investigations need to be carried out to verify whether relevant impacts exist.
Environmental Brownfield Assessment
• Traditionally brownfield environmental assessment covers three phases: • site assessment, • site investigation, and• development of remedial actions.
Site Assessment
• A preliminary examination of a site to determine the potential contamination. It includes a review of present and historical landuses and preliminary tests of places that are suspected
Site Investigation
• This phase includes a more thorough review of conditions at the site.
• Typically it includes:• Performing soil borings and collecting soil samples;• Installing water monitoring wells and collecting
groundwater samples from each well; and• Analyzing all samples for the presence of
contaminants.
Remediation methods
• The intent of remediation is two-fold:• to eliminate the exposure of humans and living
organisms to the contaminants, and • to eliminate the sources of contamination to
• Thermal desorption removes harmful chemicals from soil and other materials (like sludge and sediment) by using heat to change the chemicals into gases.
• These gases are collected with special equipment. The dust and harmful chemicals are separated from the gases and disposed of safely. The clean soil is returned to the site.
• Thermal desorption is not the same as incineration, which uses heat to destroy the chemicals.
• Technology that stimulates the natural in situ biodegradation of any aerobically degradable compounds in soil by providing oxygen to existing soil microorganisms.
• Uses low air flow rates to provide only enough oxygen to sustain microbial activity.
• Oxygen is most commonly supplied through direct air injection into residual contamination in soil.
• For determination of site’s environmental burdens it is necessary to perform site investigation
• Based on the findings a proper decontamination method or combination of methods must be chosen
• There are many decontamination methods and their suitability depends on media type and contaminants detected
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„This project has been funded with support from the European Commission. This publication [communication] reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the