air quality consultancy Articles

  • Pulp & Paper Water Treatment - A look at optimizing water resource management

    Application Case Study (Pulp/Paper Operations) The pulp and paper industry has traditionally been a consumer of large amounts of fresh water and power. Recently, increased focus has been given to the optimized efficiency of paper mills and to the environmental sustainability footprint of the industry. Therefore, water resource management has become a more critical factor ...

  • Air quality in America

    Although most Americans tell pollsters they believe air pollution in the United States is getting worse, the reality is quite different. In 'Air Quality in America: A Dose of Reality on Air Pollution Levels, Trends, and Health Risks' (AEI Press, January 2008) environmental scientist Joel Schwartz and political scientist Steve Hayward demonstrate why air pollution has been dropping steadily for ...


    By Blue Sky Consulting Group

  • Indoor Air Quality Complaint Response

    Hygieneering’s Industrial Hygiene department recently responded to Indoor Air Quality concerns by occupants in a hospital following a localized fire within their building.  The response including conducting air sampling for potential contaminants associated with the fire and an evaluation of remediation efforts.  Recommendations were provided to change air flow patterns to better ...


    By Hygieneering, Inc.

  • 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.

  • An Automated Workflow for Meteorological and Air Quality Data

    An Automated Workflow for Meteorological and Air Quality Data All collected as hourly average data on a Campbell Scientific CR3000 8 years of data taken hourly and daily 4 stations in remote areas of the Dominican Republic  20 primary measured parameters Added Air Quality QA/QC ...


    By EarthSoft, Inc

  • Cumulative Air Quality Impact Assessments - A Case Study

    Introduction Deregulation across the country has resulted in the proposal of hundreds of new power plants within the last several years.  Each power plant, individually, is required to demonstrate conformance with state and federal air quality regulations.  However, there is still a great deal of public concern over the combined or cumulative impact that all of these proposed ...


    By Trinity Consultants

  • 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

  • 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.

  • Air quality issues drive vehicle alternatives

    Vehicle exhaust systems remain a major source of air pollution in cities, despite the progress being made to reduce emissions from new models. Energy World takes a look at efficiency improvements, and the alternative fuel alternatives to petrol and diesel. In early April, the south of Britain woke to a hazy blanket of smog. A few weeks earlier, Paris had choked and spluttered through its own ...


    By Energy Institute (EI)

  • Vapor intrusion and indoor air quality due diligence during property transactions

    Vapor intrusion (i.e. the migration of volatile chemicals from contaminated soil and/or ground water through the subsurface into overlying building structures) as a contributing indoor air has become a growing concern for property owners and prospective purchasers in recent years as it can cause significant indoor air quality problems. This is largely due to the increased focus on this issue by ...

  • World Bank chooses NILU as air quality adviser in Hanoi

    The World Bank (WB) has chosen The Norwegian Institute for Air Research (NILU) to evaluate plans for better air quality in Hanoi, Vietnam. NILU will thus work closely with the Vietnamese Department of Natural Resources and Environment (DONRE) to secure the highest standards in all the elements of DONRE´s ambitious plan for improving air quality in the Vietnamese capital.  NILU´s main tasks are ...

  • Canarina DISPER Software · air quality modeling system · algorithms 5

      Canarina DISPER Software · air quality modeling system   The mathematical model that the software uses provides options to model emissions from a wide range of sources that might be present at industrial areas and urban areas. The basis of the model is the straight-line, steady-state Gaussian plume ...

  • Canarina DISPER Software · air quality information system · algorithms 4

      Canarina DISPER Software · air quality information system   Symbol / Definition z= Receptor/terrain height above mean sea level (m) zd= Dry deposition reference height (m) zr= Receptor ...

  • Staff spotlight: atmospheric chemist addresses California air quality issues

    With over a decade of experience addressing West Coast air quality issues, Dr. Charles Lee, Managing Consultant in Trinity’s Irvine, California office, is a valuable resource on air quality, greenhouse gas (GHG), and risk related issues such as permitting requirements, air quality monitoring, source testing, auditing, GHG verifications, and health risk assessments. Dr. Lee is particularly ...


    By Trinity Consultants

  • Staff spotlight: atmospheric scientist tackles complex air quality issues

    George Schewe, a Certified Consulting Meteorologist and Qualified Environmental Professional, joined Trinity’s Covington, Kentucky office in 2008. A veteran of EPA with nearly three decades of consulting experience, George is well-versGeorge Schewe_photoed in air quality regulatory requirements and a master in complex air dispersion modeling analyses. Here is George’s take on his role ...


    By Trinity Consultants

  • Sensitivity of the AERMOD air quality model to the selection of land use parameters

    AERMOD is a new, advanced plume dispersion model that the U.S. Environmental Protection Agency (EPA) is expected to propose for regulatory use. It is intended to replace ISCST3 for most modeling applications. AERMOD is the result of an effort to incorporate scientific knowledge gained over the last three decades into regulatory plume models. AERMOD requires, as input, three site-specific land use ...


    By Trinity Consultants

  • Air Quality Permitting for a New Coal-Fired Power Plant: A Timeline

    The high price of natural gas and alternative fuels has made utility companies take a second look at coal as a cheap, plentiful fuel source. For a greenfield plant considering coal, the environmental considerations are significant but not insurmountable. This article discusses the air quality regulations and permitting requirements that must be addressed, from New Source Review to greenhouse gas ...


    By Trinity Consultants

  • Using ADMS models for Air Quality Assessment and Management in China

    Many cities and regions are undertaking studies of air quality in cities to determine both the current state of the environment and the effect of future economic and environmental strategies in order to manage local air quality. Often these studies are driven by legislation such as the European Union requirement to model agglomerations or the Chinese requirements to study air quality capacity and ...

  • New air quality rules challenge oil & natural gas industry

    EPA Administrator signed a suite of proposed new air regulations affecting both the Production/Processing and Transmission/Storage sectors of the oil and natural gas industry. The proposed rules mandate the use of emission controls as well as work practices through two different air regulatory programs – New Source Performance Standards (NSPS) and National Emissions Standards for Hazardous ...


    By Trinity Consultants

  • Monitoring Environmental Quality

    ' In order to determine the effectiveness of actions to improve environmental quality it is necessary to be able to measure relevant environmental parameters at a level of detail which is accurate enough to distinguish the anticipated changes. However, the establishment and maintenance of monitoring systems is time-consuming and expensive and therefore the scale of such systems needs to be kept ...


    By The World Bank

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