air quality monitoring Articles

  • Trial setup of Wireless Indoor Air Quality (IAQ) Monitor in a Hong Kong office building.

    A recent trial setup of the Wireless IAQ Profile PPMonitor in a Hong Kong office building in order to test out the units against a typical hot and humid Hong Kong ...


    By PPM Technology

  • Marine Monitoring of Emissions of Air Pollutants

    Many of us who are not in the marine shipping business probably think of vessels as practical means of transportation, or, when it comes to cruising ships,  a place to spend your vacation. However, not all of us realize that large ships also are floating large power plants, with all aspects that come with power plants including potential contribution to air pollution. The ...


    By Opsis AB

  • Indoor air quality and mold case study

    Service(s) performed: Indoor air quality and mold management services Summary: EFI Global has provided indoor air quality and asbestos abatement services to numerous school districts and universities nationwide. At a public educational system with 7 campuses totaling over 5 million square feet, our environmental professionals performed comprehensive indoor ...


    By EFI Global, Inc.

  • Baseline data in air quality impact studies

    The main objective of this paper is to explain not only the importance of the baseline data in air quality studies but also the general procedures and steps involved in the baseline data collection. Special considerations on the instruments and measurements for a perfect baseline data collection are also emphasized in this paper. As an example, an adequate baseline data collection procedure which ...


    By Inderscience Publishers

  • 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 ...

  • Marine Monitoring of Emissions of Air Pollutants

    Many of us who are not in the marine shipping business probably think of vessels as practical means of transportation, or, when it comes to cruising ships, a place to spend your vacation. However, not all of us realize that large ships also are floating large power plants, with all aspects that come with power plants including potential contribution to air pollution. ...


    By Opsis AB

  • 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.

  • Confronting allegations of air quality non-compliance

    A facility with an air quality permit must comply with all the conditions of that permit and demonstrate its compliance on an on-going basis. Unfortunately, no matter how diligently the facility and corporate staff strives to assure continuous compliance, unexpected compliance challenges can occur. For example, new equipment fails the emissions guarantees provided by equipment vendors; new staff ...


    By Trinity Consultants

  • Multiple sensor fault detection and isolation of an air quality monitoring network using RBF-NLPCA model

    This paper presents a data-driven method based on non-linear principal component analysis to detect and isolate multiple sensor faults. The RBF-NLPCA model is obtained by combining a principal curve algorithm and two three-layer radial basis function (RBF) networks. The reconstruction approach for multiple sensors is proposed in the non-linear case and successfully applied for multiple sensor ...


    By Inderscience Publishers

  • Warehouse Optimization: Balancing Equipment Performance and Worker Safety Through Emissions Measurements and Air Quality Monitoring

    Successful warehouse functionality is dependent on both maximizing equipment performance and providing a safe and healthy environment for workers that encourages productivity. However, these two factors are often at odds with each other as warehouse equipment such as forklifts, burnishers and delivery trucks emit toxic gases that can have the potential to create poor indoor air quality which ...

  • 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 Pty Ltd

  • Criteria for the assessment of air quality levels in homogeneous areas

    A methodology is proposed for the appraisal of the data to confront with air quality limits. The methodology assesses air quality levels on the basis of mean values calculated as an average of all data collected in homogeneous areas, from monitoring stations located in sites not conditioned from local sources emissions. The resulting value represents the air quality of the area better than a ...


    By Inderscience Publishers

  • Top 5 Differences between Micro Pulse LiDAR and Ceilometer Technology

    If you are evaluating backscatter LiDAR sensors for measuring aerosols, cloud vertical structure, and planetary boundary layer (PBL) heights, what factors should you consider in your comparison? It really comes down to a choice between the traditional analog technology used in ceilometers and the more recent advanced technology found in Micro Pulse LiDAR (MPL) sensors. To select the best tool ...

  • 2 ambient air monitoring stations for Bangladesh

    Bangladesh is one of the most densely populated countries in the world and its urban areas suffer from air pollution of different levels and it is extremely high in the Dhaka city where the population is about 12 million in 300 km2 of surface area. It has been estimated that air pollution is causing about 15,000 premature deaths and several million cases of illness every year, in the Dhaka city ...


    By ENVEA

  • 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

  • Combined use of space–borne observations of NO2 and regional CTM model for air quality monitoring in Northern Italy

    In this paper SCIAMACHY observations of earth radiance are used to retrieve nitrogen dioxide (NO2) tropospheric column by DOAS spectrometric technique and radiative transfer modelling for AMF computation. These satellite column measurements are then merged with TCAM model simulations, to improve the model output at the ground level. The method used is a weighted rescaling of ...


    By Inderscience Publishers

  • Lisbon air quality forecast using statistical methods

    Ozone and particulate matter levels in Southern European countries are particularly high, exceeding the established limit values, and the information and alert thresholds (in the case of ozone). Therefore, it is relevant to develop a good prediction methodology for the concentrations of these pollutants. Statistical models based on Multiple Regression (MR) analysis and classification and ...


    By Inderscience Publishers

  • 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

  • Air quality interventions and spatial dynamics of air pollution in Delhi and its surroundings

    The paper examines the spatial distribution of air pollution in response to recent air quality regulations in Delhi, India. Air pollution was monitored at 113 sites spread across Delhi and its surrounding areas from July?December 2003. From the analysis of these data three important findings emerge. First, air pollution levels in Delhi and its surroundings were significantly higher than that ...


    By Inderscience Publishers

  • Designing and Implementing Perimeter Air Monitoring Programs

    Perimeter or fenceline ambient air quality and meteorological monitoring programs have become increasingly valuable at hazardous waste, landfill, dredging, ports, and MGP remediation sites. Air quality monitoring programs protect public health and reduce owner liability ...


    By AECOM

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