ambient air quality Articles

  • 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 ...

  • 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.

  • 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

  • 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 ...

  • Air Quality Monitoring in the EU – What, Where, and How?

    Air quality is essential to all of us, and consequently, so is the monitoring of air quality. However, what should be monitored, and where, and how? There are many bids on that. Some ten years ago, The European Union established its directive 2008/50/EC “on ambient air quality and cleaner air for Europe”. It is aimed at protecting human health as well as vegetation, and ...


    By Opsis AB

  • 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

  • Study of vehicular emissions with reference to Pakistan's National Environmental Quality Standards: case study of District Swat, North of Pakistan

    This study was conducted during 2011–2012 with the objective to assess the ambient air quality in the surroundings of a newly constructed road in relation to Pakistan's Environmental Quality Standard (Pak–NEQS). The area was monitored twice, before and during the construction, to determine levels of sulphur dioxide, nitrous oxide, carbon monoxide, and PM10 (particulate matter). A ...


    By Inderscience Publishers

  • 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.

  • 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 ...

  • A Critical Evaluation of the South African Air Quality Offsets Guideline

    There is wide recognition in South Africa to the link between the quality of life and quality of the air we breathe. The Department of Environmental Affairs (DEA) attempts to improve air quality through two key regulatory tools; emission limits, which regulate the maximum concentration of certain pollutants permissible within certain, ‘listed’ industrial stacks or vents, and ambient ...


    By WKC Group

  • 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.

  • 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. ...

  • Experiences in the modelling of traffic policy measures for ambient air quality management in Lithuania

    This paper presents the application of the Integrated Transport Effect Modelling System (ITEMS) in the city of Kaunas, Lithuania, taking into consideration some factors such as existing vehicle fleet, traffic flows, and ambient air quality monitoring data. The objective of this study is to estimate the exhausts of CO, NOx, and SO2 released by motor vehicles in relation to predictive traffic ...


    By Inderscience Publishers

  • `Air Permitting for a New Coal-Fired Power Plant,` published in Power magazine, November

    Prevention Of Significant Deterioration (PSD) Construction of any new source, including a greenfield power plant, is subject to New Source Review (NSR). If the source is located in an attainment area, it will also trigger Prevention of Significant Deterioration (PSD) permitting, as required by the Clean Air Act (CAA) for major stationary sources of air pollution in attainment areas. A major ...


    By Trinity Consultants

  • Understanding ambient air quality instrument operating ranges

    In order to maximize the performance of an air quality monitoring station, careful selection of instrumentations is essential. One of the key issues is to have a good understanding of what pollutants need to be measured and at what concentrations. There are several different types of air quality monitoring, these include: Trace/Background Monitoring This is performed in areas where ...


    By Ecotech - ACOEM Group

  • Ambient Air Quality Analysis of Toxic Gases and Priority

    The EPA regional offices who continuously monitor ambient air quality have determined that combustion by-products and automobile exhaust make up the largest source of air pollution throughout the U.S., with more severe conditions existing overseas. Despite concerns about the conditions outdoors, air quality in the workplace and home environment receive even more attention. The EPA’s list of ...


    By Buck Scientific Inc

  • Real-World Vehicle Emissions: A Summary of the 14th Coordinating Research Council On-Road Vehicle Emissions Workshop

    The Coordinating Research Council held its 14th Vehicle Emissions Workshop in March 2004, where results of the most recent on-road vehicle emissions research were presented. We summarize ongoing work from researchers who are engaged in improving our understanding of the contribution of mobile sources to ambient air quality andemission inventories. Participants in the workshop discussed efforts to ...

  • A dynamite job? Cleaning up trinitrotoluene waste at the Apache powder superfund site.

    The clean up of trinitrotoluene (TNT) wastes and contaminated soils from an abandoned TNT salvage operation is underway at the Apache Powder Superfund Site in Cochise County. Clean-up operations involved an unexploded ordnance (UXO) survey, on-site pre-burn of high-grade materials, excavation, and off-site disposal. Approximately 5,400 lb of high-grade TNT wastes (averaging approximately 33 ...


    By Hargis + Associates Inc

  • Update and revision of Turkish air quality regulation

    The Air Quality Assurance Regulation (AQAR) was issued on October 1986. This regulation was basically a direct translation of the German TA-Luft of 1984. The main purpose of AQAR was to control the effect of industry, domestic heating and Traffic on ambient air quality which previously had not adequately been represented. Two new regulations, "Industry Related Air Pollution Control Regulation" ...


    By Inderscience Publishers

  • Ambient air quality levels in Tehran, Iran, from 1988 to 1993

    The objectives of this study were to describe trends in ambient air quality in Tehran between 1988 and 1993, to determine if these levels exceeded the World Health Organization (WHO) guidelines, and to discuss possible health effects related to exposure for these particular pollutants. Data were acquired from Iran's Environmental Protection Agency (IEPA) and the Ministry of Health (MH). These ...


    By Inderscience Publishers

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