Stop the dump chugiak Alaska


Gypsum becomes poisonous gas in the landfill
"...when drywall reaches landfills--and it does so in vast quantities, as it constitutes about 15% of all construction and demolition debris--it can leach these toxic chemicals into groundwater. And in the anaerobic conditions of landfills, bacteria convert gypsum into hydrogen sulfide, a poisonous gas. ..." Read more

Hydrogen Sulfide: Health Effects, Detection and Exposure Prevention
(Gases from sheetrock)

Hydrogen sulfide can affect the body if it is inhaled or it comes in contact with the eyes, skin, nose or throat. It can also affect the body if it is swallowed.

Inhalation of low concentrations may cause headache, dizziness and upset stomach. At higher concentrations hydrogen sulfide may cause loss of consciousness and death. Hydrogen sulfide has a strong odor of rotten eggs at low concentrations and a sweetish odor at higher locations.

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Problems of Traditional Handling Methods

Hydrogen sulfide gas may be produced when landfilling gypsum, particularly in a wet climate. Several conditions are required, including a moist, anaerobic environment and a low pH. Hydrogen sulfide gas is toxic at high concentrations (~1,000 parts per million) and has a foul, rotten-egg odor. Several communities in Canada do not accept drywall at landfills for this reason. Read more...


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Stop the dump chugiak alaska

Landfills: Emerging Public & Occupational Health Issues

Historically, construction and demolition (C&D) debris landfills have been considered nonhazardous operations, containing relatively inert wastes such as concrete, asphalt, wood, metals, gypsum drywall, and roofing materials. In recent years, however, it has become increasingly clear that emissions resulting from the decomposition of gypsum drywall and organic debris are a public health issue. Drywall, comprised of gypsum (CaSO4 •2H2 O), breaks down into hydrogen sulfide and other sulfur compounds under anaerobic conditions and in the presence of water. When exposed to water, the sulfate in the gypsum is dissolved in landfill leachate (Townsend, 1998) Read more... (PDF)