IMPACT OF CONSTRUCTION AND DEMOLITION
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IMPACT OF CONSTRUCTION AND DEMOLITION
INTRODUCTION
Historically, construction and demolition (C&D) debris dumps were deemed nonhazardous activities because they contained relatively inert wastes like concrete, asphalt, wood, metals, gypsum plasterboard and roofing materials.
In recent years, however, it has become increasingly obvious that emissions from the decomposition of gypsum plasterboard and organic detritus pose a public health risk.
Plasterboard, which is made of gypsum (CaSO4 •2H2 O), degrades into hydrogen sulphide and other sulphur compounds in anaerobic circumstances in the presence of water.
Overall, the good news is that C&D landfills are not known to be particularly hazardous to human health, while they do pose concerns (Colledge and Wilder 2011).
In each of the case studies from New York, Wisconsin, and Virginia (mentioned above), where a C&D landfill was identified to pose potential health risks to the community, there were problems with the ENST 698, autumn 2011 facilities that could have been prevented or fixed (United States Environmental Protection Agency Office of Solid Waste 1995).
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