air quality standard Articles

  • Investigation of roadside concentrations in busy streets using the model GRAM: conditions leading to high short-term concentrations

    A new air quality assessment model GRAM, based on current Gaussian models, is described. It has been specifically designed for convenient assessment of air quality concentrations in relation to new air quality standards. Particular attention is paid to short-term peak concentrations. Factors which are likely to lead to high roadside concentrations are described. It is shown that none of the ...


    By Inderscience Publishers

  • EPA’s proposal to revise the air quality standards for ground-level ozone

    OnJune 20, 2007, the U.S. Environmental Protection Agency (EPA) proposed to strengthen the nation’s air quality standards for ground-level ozone. Recent scientific literature has improved our understanding of the adverse effects of ozone on both human health and the environment. This article summarizes the latest scientific knowledge on the effects of ozone and the key aspects of EPA’s proposal ...

  • National Ambient Air Quality Standards Update

    You have seen ALL4 documenting the corresponding evolution of the NAAQS levels since the current U.S. EPA administration started in January 2009, and we will continue to follow them closely and provide you with updates that we think are important to your operations.  The following sections provide updates on the most important NAAQS and how you can plan for them today.  Discusses SO2, ...


    By All4 Inc.

  • New American air quality standards focus on public health

    The US Environmental Protection Agency has significantly strengthened its national ambient air quality standards (NAAQS) for ground-level ozone, the primary component of smog. These changes will improve both public health protection and the protection of sensitive trees and plants. Based on its review of the air quality criteria for ozone (O3) and related photochemical oxidants and national ...

  • Methodology for developing an air quality index (AQI) for Tunisia

    Air quality index (AQI) is a quantitative tool through which air pollution data can be reported, providing information on how clean or polluted the air is. Several countries employ some type of air quality index to communicate the quality of their air. Some of these systems rely on relating measured (monitored) or predicted concentrations of air pollutants (results of modelling system). In this ...


    By Inderscience Publishers

  • Collaboration with the EPA

    The EPA and many clients with NOx compliance challenges are excited about Know-NOx technology. Know-NOx participation in research, testing, and problem resolution has earned favorable recognition with many local EPA districts.  The PRDD/Know-NOx technology appears to be the best available option for ambient temperature NOx abatement compliance with Part 50.11 of the National Primary & ...


    By Know-NOx

  • Trading NOx in the North-east USA

    Controlling ozone raises thorny issues. Daniel Chartier examines the US ‘cap and trade’ approach to the problem. The problem of ozone in the Northeastern US has been a persistent one. Throughout the North-eastern and Mid-Atlantic US the federal National Ambient Air Quality Standard (NAAQS) for ground level ozone is exceeded repeatedly each summer.  Despite attempts to deal with the ozone ...

  • Economic Evaluation of Air Quality Targets for CO and Benzene

    The study is to identify and estimate the costs and benefits of meeting ambient air quality standards for carbon monoxide (CO) and benzene in the EU. The study should take the range of scientifically-based limit values for ambient air quality as given and analyze the costs and benefits of attaining these standards. These costs and benefits should be compared with the costs (loss of benefits) of ...

  • Legal Lookout: EPA Staff Urges Changes in PM Standards

    Earlier this year, EPA staff scientists urged agency management to revise the current particulate matter (PM) standards for fine particles and the inhalable portion of coarse particles, based on evidence that suggests to EPA scientists that more protection is needed than is provided under current air standards. Background The Clean Air Act (CAA) requires that EPA periodically review its ...


    By Bergeson & Campbell, P.C.

  • Economic Evaluation of Air Quality Targets for Tropospheric Ozone

    The study identifies and estimates the (least) costs and benefits of meeting ambient air quality standards (different sets of limit/target values) for tropospheric ozone in the EU, taking into account deposition constraints for acidification. This report is divided into three parts: Part A describes the methodology of the analysis and reviews the databases used for the scenario calculations. ...

  • WQP magazine`s featured article written by company president

    The interest in reducing environmental lead exposure in evident with the recent revision by the U.S. Environmental Protection Agency (EPA) for the nation's Air Quality Standards, which were lowered from 1.5 to 0.15 ug of lead per cubiv meter of air. "With these stronger standards, a new generation of Americans is protected from harmful lead emissions, especially children," said EPA Administration ...

  • Will the Circle Be Unbroken: A History of the U.S. National Ambient Air Quality Standards

    ABSTRACT In celebration of the 100th anniversary of the Air & Waste Management Association, this review examines the history of air quality management (AQM) in the ...

  • AQMesh tracks pollution hot spots

    Location Wales (UK) Environment / location Rural, major roadside Installation Single AQMesh pod used in several locations Application Monitoring traffic emissions Objectives Having identified concerning levels of NO2 that breached ...


    By AQMesh

  • Expect Tighter Particulate Matter Standards

    Particulate matter (PM) is a hot button issue poised to raise business costs and litigation. The U.S. Environmental Protection Agency (EPA) was recently due to issue final PM standard revisions. EPA last year proposed stronger National Ambient Air Quality Standards (NAAQSs) for fine PM (2.5 micrometers or less in diameter (PM2.5)) and the 24-hour PM2.5 standard. However, EPA sought to keep annual ...


    By Bergeson & Campbell, P.C.

  • What is sustainable air quality?

    For 40 years or more, air quality policy has been based on the paradigm of the air quality standard as a uniform criterion of acceptable environmental degradation, built on the foundations of the precautionary principle. However, developments in health science have undermined some of the underlying assumptions of this paradigm whilst technological emission controls have been offset by growing ...


    By Inderscience Publishers

  • A practical guide to PM2.5

    By now you’ve likely heard about U.S. EPA’s final rules governing the implementation of the New Source Review (NSR) program for fine particulate matter (i.e., particulate matter with an aerodynamic diameter less than 2.5 microns, or PM2.5). ALL4 published two articles in 2008 addressing specific aspects of the PM2.5 NSR rule. ALL4 has since formally established a PM2.5 Team to ...


    By All4 Inc.

  • Legal Lookout: EPA Staff Urges Changes in PM Standards

    Earlier this year, EPA staff scientists urged agency management to revise the current particulate matter (PM) standards for fine particles and the inhalable portion of coarse particles, based on evidence that suggests to EPA scientists that more protection is needed than is provided under current air standards. Background The Clean Air Act (CAA) requires that EPA periodically review its ...


    By Bergeson & Campbell, P.C.

  • Plantwide Applicability Limits (PALs): A Legitimate Alternative to Major New Source Review Permitting

    Plantwide Applicability Limits: A Legitimate Alternative to Major New Source Review Permitting. There have been a number of recent developments regarding U.S. EPA"s interpretation of the major New Source Review (NSR) air permitting rules that are related to the NSR Reform provisions of December 2002.  When these new interpretations are considered in combination with the promulgation of ...


    By All4 Inc.

  • James V. Aidala Quoted In Inside EPA Article “Pruitt`s Science Plan Faces Host Of Legal Hurdles; Some Doubt Promulgation”

    On May 7, 2018, James V. Aidala, Senior Government Affairs Consultant with Bergeson & Campbell, P.C. (B&C®), was quoted by Inside EPA regarding U.S. Environmental Protection Agency (EPA) Administrator Scott Pruitt’s plan to require EPA to only use publicly available material to justify regulatory decisions. Others raise concerns over the document's introduction of a host of new ...


    By Bergeson & Campbell, P.C.

  • Integrated science assessment for oxides of nitrogen – health criteria

    Oxides of nitrogen is one of six principal (or “criteria”) pollutants for which EPA has established national ambient air quality standards (NAAQS). The Clean Air Act requires EPA to periodically review the scientific basis for these standards by preparing an Integrated Science Assessment (ISA), formerly called an Air Quality Criteria Document (AQCD). The ISA was prepared as part of the review of ...

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