Search results for epa

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Proposed Air Quality Standards for Sulfur Dioxide

…studies have linked short-term (e.g. ranging from 5 minutes to 24-hours) SO2 exposures to adverse respiratory effects including increased asthma symptoms and bronchoconstriction. The EPA is currently taking comments on…

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EPA Revisions to the Lead Ambient Air Monitoring Requirements

…On December 14, 2010 the EPA revised the ambient monitoring requirements for lead (Pb). This action comes after the EPA revised the primary and secondary lead National Ambient Air…

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EPA Delays Greenhouse Gas Stationary Permits Until 2011

…On March 29, 2010, the EPA issued a final decision to delay the greenhouse gas permitting requirements for stationary sources until January 2011. The delay allows facilities and state…

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EPA Issues New Short-term NO2 National Ambient Air Quality Standard

…ppb. The EPA administration is retaining the current annual standard of 53 ppb. The EPA decided the existing annual standard does not provide sufficient protection of public health in the…

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From Whence Came Ldn / DNL 65?

…between compatibility and incompatibility with noise. Efforts were pursued in many countries. In the U.S., it appears that a “west coast”, an “east coast”, and a U.S. EPA effort were…

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Dulles Airport Air Cargo Connector Environmental Assessment

EPA approved MOVES emission model and the CAL3QHC dispersion model. The study area is located in an EPA designated non-attainment area for the 1997 annual PM2.5 standard. Based on the…

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Airborne Emissions Inventory, Louisville International Airport

…support equipment (GSE), auxiliary power unit (APU) and most of the stationary source emissions and will also use the EPA MOVES2014a model to estimate ground access (i.e., mobile) vehicle emissions….

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VDOT Route 460 Supplemental EIS

…traffic volumes was conducted. Mobile source emissions were derived using the EPA MOVES model while ambient pollutant concentrations at a variety of receptor locations were estimated using the EPA CAL3QHC…

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VDOT I-64 High Rise Bridge Corridor Study

…the quantitative thresholds specified in the VDOT and FHWA Air Quality Studies Agreement. HMMH estimated carbon monoxide emission rates using the EPA MOVES model for the Existing, Interim Build, and…

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Solar PV Air Quality Environmental Assessment, Hanscom Air Force Base

…(NOx), particulate matter (PM10 and PM2.5) and carbon dioxide (CO2) would be estimated. Total construction and operational emissions were estimated, summarized, and compared to the EPA de minimis levels based…

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