Environment
After the closure of the Denver Ordnance Plant, the GSA and other agencies disposed of miscellaneous wastes, including chemicals, contaminated material, and building and road demolition debris. The waste was disposed in multiple sites throughout the Denver Federal Center, primarily in the Southwest and Northwest landfills, and the former United States Environmental Protection Agency Superfund Sites CO6470000039 and CO1680090031. As a consequence of the materials disposal, the EPA and the Colorado Department of Public Health and Environment (CDPHE) have considered these areas to be significantly contaminated by hazardous waste. Excessive levels of chemicals were found in the debris, soil, ground water and surface water. Asbestos-containing materials were found as well.
During the 1980s, a chlorinated solvent leak emanated from an underground storage tank near Building 52. At the time, the hazardous material was managed by the United States Department of Transportation. The storage tank contained 1,1,1-trichloroethane (TCA), used to dissolve asphalt samples for testing. The leak caused a large groundwater solvent plume to spread beyond the DFC's eastern boundary and contaminate neighboring wells. To mitigate groundwater contamination by the chlorinated solvents, in 1996 the U.S. Geological Survey served as an advisor to the U.S. Army Corps of Engineers in the construction of in-ground permeable reactive barriers. The permeable reactive barriers neutralize the solvents in the ground water. The groundwater is chemically altered as it passes through the barriers made with zero-valence iron. TCE and dichlorethene are found in concentrations of higher than 200 parts per billion as they enter the barriers and measure less than one part per billion as the groundwater exits the barriers.
In 2006 the USGS notified the Nuclear Regulatory Commission (NRC) of a leak from a water storage tank containing radioactive water and equipment. The impacted tank is used for equipment storage and not reactor operations. An estimated 575 gallons of water leaked into the ground, although USGS officials claimed there was no evidence of contamination measured at a nearby groundwater monitoring well at that time. The USGS has operated the non-power nuclear reactor since 1969.
Read more about this topic: Denver Federal Center
Famous quotes containing the word environment:
“The poorest children in a community now find the beneficent kindergarten open to them from the age of two-and-a-half to six years. Too young heretofore to be eligible to any public school, they have acquired in their babyhood the vicious tendencies of their own depraved neighborhoods; and to their environment at that tender age had been due the loss of decency and self-respect that no after example of education has been able to restore to them.”
—Virginia Thrall Smith (1836–1903)
“A positive learning climate in a school for young children is a composite of many things. It is an attitude that respects children. It is a place where children receive guidance and encouragement from the responsible adults around them. It is an environment where children can experiment and try out new ideas without fear of failure. It is an atmosphere that builds children’s self-confidence so they dare to take risks. It is an environment that nurtures a love of learning.”
—Carol B. Hillman (20th century)
“... several generations of slum environment will produce a slum heredity ...”
—Albion Fellows Bacon (1865–1933)