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  2. National Emissions Standards for Hazardous Air Pollutants

    en.wikipedia.org/wiki/National_Emissions...

    The National Emission Standards for Hazardous Air Pollutants (NESHAP) are air pollution standards issued by the United States Environmental Protection Agency (EPA). The standards, authorized by the Clean Air Act, are for pollutants not covered by the National Ambient Air Quality Standards (NAAQS) that may cause an increase in fatalities or in serious, irreversible, or incapacitating illness.

  3. NIOSH air filtration rating - Wikipedia

    en.wikipedia.org/wiki/NIOSH_air_filtration_rating

    (OBSOLETE) 30 CFR 11 efficiency levels [11] [13] Particulate Respirator approval Maximum dust penetration Minimum efficiency level Permitted for TB Permitted for asbestos; 158.4 mg silica 7.92 m 3 (280 cu ft) air Single-use Dust/Mist filters 1.8 mg 98.86% No No 158.4 mg, usually silica 7.92 m 3 (280 cu ft) air Replaceable Dust/Mist filters 1.5 ...

  4. WELL Building Standard - Wikipedia

    en.wikipedia.org/wiki/WELL_Building_Standard

    A01 Air Quality topic, the WELL conducts to limit level of particulate matter both PM2.5 and PM10 under 15 and 50 for normal region or 25 and 50 microgram/cubic metre or 30% of 24–48 hours average of outdoor levels for polluted region and thresholds for volatile organic compound (VOC) such as benzene, formaldehyde, toluene to 10, 50, and 300 ...

  5. EPA to ban last form of asbestos used in US - AOL

    www.aol.com/news/epa-ban-last-form-asbestos...

    The ban of chrysotile asbestos, the only form of asbestos currently used in or imported to the United States, comes after the EPA under the previous Trump administration delayed banning the substance.

  6. NEMA enclosure types - Wikipedia

    en.wikipedia.org/wiki/NEMA_enclosure_types

    Below is a list of NEMA enclosure types; these types are further defined in NEMA 250- Enclosures for Electrical Equipment. Each type specifies characteristics of an enclosure, but not, for example, a specific enclosure size. Note that higher numbers do not include the lower-numbered tests. For example, types 3, 4 and 6 are intended for outdoor ...

  7. Phase I environmental site assessment - Wikipedia

    en.wikipedia.org/wiki/Phase_I_environmental_site...

    This investigation is normally undertaken when a Phase I ESA determines a likelihood of site contamination. The most frequent substances tested are petroleum hydrocarbons, heavy metals, pesticides, solvents, asbestos and mold. Phase III Environmental Site Assessment is an investigation involving remediation of a site. Phase III investigations ...

  8. Category:NEMA standards - Wikipedia

    en.wikipedia.org/wiki/Category:NEMA_standards

    Pages in category "NEMA standards" The following 8 pages are in this category, out of 8 total. This list may not reflect recent changes. *

  9. Asbestos abatement - Wikipedia

    en.wikipedia.org/wiki/Asbestos_abatement

    In construction, asbestos abatement is a set of procedures designed to control the release of asbestos fibers from asbestos-containing materials. [1] Asbestos abatement is utilized during general construction in areas containing asbestos materials, particularly when those materials are being removed, encapsulated, or repaired.