air quality analyzer Articles
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Advantages & Disadvantages of Ozone Transfer Standards
Calibrating ambient air monitors is vital for getting pollution monitoring right. Ambient air monitors can provide critical data about the health of our immediate atmosphere and what needs to change to improve air quality. Ozone transfer standards are a vital part of that process, ensuring air quality analyzers are calibrated and working effectively. To understand more about them, this post will ...
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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 ...
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`Understanding and Adapting to New Dispersion Models,` published in the Oregon Insider, December 2001
The U.S. Environmental Protection Agency (EPA) has proposed revisions to its air dispersion modeling guidance1 ("Guideline on Air Quality Models", or simply "Guideline"), found in 40 CFR 51 Appendix W.2 These revisions, once finalized, will create significant changes in the way that air quality analyses are performed in the US, and perhaps the most significant changes since (he Guideline was ...
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Understanding and Adapting to New Dispersion Models
The U.S. Environmental Protection Agency (EPA) has proposed revisions to its air dispersion modeling guidance1 (“Guideline on Air Quality Models”, or simply “Guideline”), found in 40 CFR 51 Appendix W.2 These revisions, once finalized, will create significant changes in the way that air quality analyses are performed in the US, and perhaps the most significant changes since the Guideline was ...
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PM2.5 Air Quality Modeling Updates
There has been much activity over the past six (6) months that will impact how air quality modeling analyses will be conducted for Prevention of Significant Deterioration (PSD) permit applications with respect to particulate matter less than 2.5 microns (PM2.5). As the resident air quality modeling expert at ALL4, I thought it was a good time to walk through each of these changes and discuss the ...
By All4 Inc.
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Reducing of Operating Cost through Ventilation on Demand - Case study
In the past few months, we have been working intensively on a project to reduce operating and energy costs, in which we were able to achieve significant optimisations. Below you will find our case study on this project. The Mobiliar Arena is a sports hall in Gümligen (Bern), Switzerland, and was completed in August 2018. The arena has a tribune for sporting and public events with a total of ...
By qlair
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New Nitrogen Dioxide Ambient Air Quality Standard Could Pose Challenges
In the more than 200 air quality modeling analyses that ALL4 meteorologists have conducted, demonstrating compliance with the annual nitrogen dioxide (NO2) National Ambient Air Quality Standard (NAAQS) of 53 parts per billion (ppbv) has rarely been an issue. The relative ease for demonstrating compliance with the annual NO2 NAAQS is due to two (2) factors. First, the NAAQS for NO2 is an annual ...
By All4 Inc.
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EPA Reviews National Ambient Air Quality Standards for Ozone, and Other Recent CAA Developments
EPA Reviews National Ambient Air Quality Standards For Ozone: On December 17, 2014, the U.S. Environmental Protection Agency (EPA) issued a proposed rule revising the air quality criteria for ozone (O3) and related photochemical oxidants and National Ambient Air Quality Standards (NAAQS) for O3. 79 Fed. Reg. 75234. EPA proposed to revise the primary standard to a level within the range of 0.065 ...
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New NO2 air standards prove technically challenging
On February 9, 2010, the U. S. Environmental Protection Agency (EPA) established a new National Ambient Air Quality Standard (NAAQS) for nitrogen dioxide (NO2). The new NO2 NAAQS is a one-hour standard set at 100 parts per billion (ppb), which is approximately 188 micrograms per cubic meter (μg/m3). Effective on April 12, 2010, the new one-hour standard is intended to protect against peak ...
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EPA shifts PM2.5 PSD permitting policies
On August 12, 2009, EPA created a significant stir in the regulated community when it issued an order that signals a significant shift in how the agency intends particulate matter with a diameter less than 2.5 micrometers (PM2.5) emissions to be regulated under the Prevention of Significant Deterioration (PSD) program. The order specifically applied to petitions filed by environmental groups ...
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Air quality assessment in the EU: room for improvement?
Different modelling approaches are used to design and assess air quality plans across Europe. This study assessed the strengths and weaknesses of these different approaches. The researchers conclude that a large variety of models is in use, without a preferred or standard model having emerged yet. They identify integrating local-scale and large-scale models and verifying models with measurements ...
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An ambient air quality monitoring network for Buenos Aires city
This paper proposes an objective methodology for designing a multi-pollutant urban air-quality monitoring network to detect concentrations greater than reference concentration levels (CL). The network design includes both air quality simulation and an objective analysis based on monitoring tasks. The proposed methodology is applied to the city of Buenos Aires. Pollutants of concern are nitrogen ...
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Dispersion modeling— New downwash calculations change the playing field
For many people, the terms “stack height” and “dispersion model” do not ring a bell. Others grapple with these terms as they can be challenging factors in the process of obtaining an air construction permit. Have you ever constructed a stack at a specific height due to EPA guidelines and regulations surrounding Good Engineering Practice (GEP) as it relates to air ...
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Air Quality Monitoring – BTEX Analyses
Benzene is a hydrocarbon that appears as a volatile liquid, capable of evaporating rapidly at room temperature; it is colourless and easily flammable and is the progenitor of a family of organic compounds defined as aromatic, due to the characteristic odour. Benzene is a natural component of oil (1-5% by volume) and its refining derivatives. PROBLEM: BTEX analysis gives a great indication of ...
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Particle reduction plans in Europe - Implementation of the first Daughter Directive on Ambient Air Quality in Europe
Untitled Document IMPLEMENTATION OF THE FIRST DAUGHTER DIRECTIVE ON AMBIENT AIR QUALITY IN EUROPE INTRODUCTION AND EXECUTIVE SUMMARY This publication analyses the quality of national implementation of the first Air Quality Daughter Directive (1999/30/EC). The report is based on information from 15 NGOs (members of the EEB’s Clean Air Working Group), who provided ...
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