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  2. RJ Lee Group - Wikipedia

    en.wikipedia.org/wiki/RJ_Lee_Group

    RJ Lee Group actively consulted with and supported EPA Region 2 in evaluating air quality in Lower Manhattan [27] buildings impacted by the events of 9/11. [ 28 ] [ 29 ] RJ Lee Group designed, implemented, and conducted sampling and laboratory analyses for building remediation while also conducting health, safety, and community air quality ...

  3. Pennsylvania Department of Environmental Protection - Wikipedia

    en.wikipedia.org/wiki/Pennsylvania_Department_of...

    The deputy secretary for Waste, Air, Radiation, and Remediation plans, directs and coordinates the department's programs related to air quality, waste management, radiation protection, and environmental cleanup. The bureaus of Waste Management, Radiation Protection, Air Quality, and Environmental Cleanup & Brownfields are housed here. [7]

  4. Montrose Environmental Group - Wikipedia

    en.wikipedia.org/wiki/Montrose_Environmental_Group

    Montrose Environmental Group, Inc. Company type Public Traded as NYSE: MEG (2020–present) ISIN US6151111019 Founded 2012 ; 12 years ago (2012) Headquarters Little Rock, Arkansas, U.S. Number of locations 90 offices Area served Worldwide Key people Vijay Manthripragada (President & CEO) Revenue US$ 624.2 million (2023) Net income US$39.7 million (2023) Number of employees 3,500 (2024 ...

  5. How to understand the Air Quality Index - AOL

    www.aol.com/news/how-to-understand-the-air...

    The AQI measures air quality based on five major pollutants that the Clean Air Act regulates: ozone, particle pollution (AKA particulate matter or PM2.5), carbon monoxide, nitrogen dioxide and ...

  6. Corsi–Rosenthal Box - Wikipedia

    en.wikipedia.org/wiki/Corsi–Rosenthal_Box

    An example of a homemade unit. The Corsi–Rosenthal Box is a design for a do-it-yourself air purifier that can be built comparatively inexpensively. It consists of four [1] or five [2] [3] HVAC particulate air filters that form a cube and a box fan to draw air through the filters.

  7. National Ambient Air Quality Standards - Wikipedia

    en.wikipedia.org/wiki/National_Ambient_Air...

    US counties that are designated "nonattainment" for the Clean Air Act's NAAQS, as of September 30, 2017. The U.S. National Ambient Air Quality Standards (NAAQS, pronounced / ˈ n æ k s / naks) are limits on atmospheric concentration of six pollutants that cause smog, acid rain, and other health hazards. [1]