Flue gas desulfurization is commonly known as FGD and is the technology used for removing sulfur dioxide (SO2) from the exhaust combustion flue gases of power plants that...
Accidental release source termsLast Updated on 2013-12-18 14:53:28
Accidental release source terms are the mathematical equations that quantify the flow rate at which accidental releases of air pollutants into the ambient environment can occur at industrial facilities such as petroleum refineries, natural gas processing plants, petrochemical and chemical plants, oil and gas transportation pipelines, and many other industrial facilities. Accidental releases in such facilities may occur through acts of nature (e.g., floods, hurricanes or earthquakes), operational errors, faulty design or inadequate maintenance.
Governmental regulations in a many countries require that the probability of such accidental releases be analyzed and their quantitative impact upon the environment and human health be determined so that mitigating steps can be planned and implemented.
There are a number of mathematical calculation methods for determining the flow rate... More »
AERMOD Last Updated on 2013-10-05 15:00:30AERMOD is the latest generation air dispersion model designed for short-range (up to 50 kilometers) dispersion of air pollutant emissions from stationary industrial sources. It is a steady-state plume model incorporating dispersion based on planetary boundary layer (PBL) turbulence structure and scaling, and it accomodates surface and elevated emission sources as well as simple or complex terrain.
As of December 9, 2005, the U.S. EPA designated AERMOD as the preferred model to be used for compliance with any federal and state air pollution dispersion modeling requirements. As of November 9, 2006, AERMOD completely replaces the previous preferred model known as the Industrial Source Complex (ISC) model.
The AERMOD system integrates three modules:
A steady-state Gaussian dispersion model designed for short-range dispersion of continuous emissions from stationary... More »
Leadership in Energy and Environmental Design (LEED) CertificationLast Updated on 2013-09-10 15:53:09
Leadership in Energy and Environmental Design (“LEED”) certification, which was developed and is administered by the United States Green Buildings Committee (“USGBC”), is an internationally recognized voluntary green building certification system that provides third-party verification that a building or community was designed and built using strategies aimed at improving performance. The "seal of approval" is aimed at “encourag[ing] and accelerat[ing] global adoption of sustainable green building and development practices through a suite of rating systems that recognize projects that implement strategies for better environmental and health performance.” The LEED rating system weighs and considers a building's contribution to energy savings, water efficiency, CO2 emission reduction, improvement in indoor environmental quality,... More »
National Center for Atmospheric ResearchLast Updated on 2013-08-21 02:53:16The National Center for Atmospheric Research (NCAR) is a non-governmental institute, based in the United States, whose stated mission is "exploring and understanding our atmosphere and its interactions with the Sun, the oceans, the biosphere, and human society."
NCAR's flagship Mesa Laboratory is located in the outskirts of Boulder, Colorado, in a dramatic complex of buildings designed by the renowned architect I. M. Pei. The site is maintained as a nature preserve.
The Mesa Laboratory includes science exhibits, an educational resource center, a library, and art galleries all of which open to the general public.
NCAR is headquartered in Boulder, Colorado, with most activity taking place on three campuses:
NCAR Mesa Laboratory: in the southwest outskirts of Boulder Foothills
Laboratory and Center Green Campus: in northeast Boulder Research
Aviation Facility: at... More »
South Coast Air Quality Management DistrictLast Updated on 2013-08-11 09:47:11The South Coast Air Quality Management District (SCAQMD), formed in 1976, is the local governmental agency in California which is responsible for regulating stationary sources of air pollution in the area depicted on the adjacent map. That area includes all of Orange county and the urban portions of Los Angeles, Riverside and San Bernardino counties. The main office of the SCAQMD is located in the city of Diamond Bar, California.
The area encompassed by the SCAQMD amounts to about 10,750 square miles (27,840 square kilometres) and is the second most populated area in the United States. This area has a severe problem with smog and the SCAQMD has been a leader in the nation's efforts to reduce air pollution emissions.
The SCAQMD develops, adopts and implements an "Air Quality Management Plan" for bringing the area into compliance with the clean air standards... More »
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