air quality permitting Articles

  • 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

  • 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

  • Seven Ways Your Facility Isn’t Meeting Effluent Regulations and How to Solve Them

    Whether you own, operate, or help manage a municipal or industrial facility that deals with wastewater, it’s important to understand how wastewater treatment can play a significant role in the overall health of your business, especially when it comes to meeting effluent regulations. This is an important part of the wastewater treatment process to consider, as ignoring it could earn your ...


    By SAMCO Technologies, Inc.

  • 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 ...


    By All4 Inc.

  • Not So Fast - Getting That Air Permit Won`t Be As Easy As You Think

    Most of the air regulations promulgated by U.S. EPA are developed and implemented to achieve compliance with the National Ambient Air Quality Standards (NAAQS).  The NAAQS represent ambient air concentration levels that are established by U.S. EPA to ensure that the general public and sensitive subgroups of the general public are not adversely affected by air pollution.  The various ...


    By All4 Inc.

  • ALL4 Air Quality Modeling Update

    As it’s been over a year since my last air quality modeling-related 4TR article, I thought it appropriate to provide a general status report on the air quality modeling updates that have occurred over the last year.  ...


    By All4 Inc.

  • New Air Permitting Requirements Finalized for Class I Areas

    Issued in December 2000, the Federal Land Managers' Air Quality Related Values Work Group (FLAG) Phase I report set new visibility requirements and adjusted air dispersion modeling values, presenting new challenges for facilities near Class I areas. The report resulted from an interagency work group comprised of U.S. Fish and Wildlife Service, National Parks Service, and United States Department ...

  • 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

  • Managing air quality during regulatory changes

    This paper discusses the regulatory and technical issues associated with the revisions to the US EPA Guideline on Air Quality Models. The proposed guideline includes the models AERMOD, CALPUFF, and ISC-PRIME, all of which contain significant technical improvements over prior models. Differences in modelling requirements are appearing as regulatory agencies and industries use technically superior ...


    By Inderscience Publishers

  • 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 ...


    By Trinity Consultants

  • New permitting requirements for sources in Indian country

    In a June 10, 2011 signed rule (published in the Federal Register (FR) on July 1, 2011) , EPA finalized a Federal Implementation Plan (FIP) for “Review of New Sources and Modifications in Indian Country.” The rules, originally proposed by EPA on August 21, 2006, establish a minor New Source Review (NSR) program (minor preconstruction permits) and a major nonattainment NSR program for ...


    By Trinity Consultants

  • Addressing New Source Permitting and Visibility Issues

    Within the past decade-- and especially in the past year-- several important developments have occurred, which affect new or proposed emission sources in virtually every region of the country. These developments include the availability of new, more accurate techniques for assessing air quality impacts, significant increases in the areas subject to assessments of pollutant impacts on Class I, ...


    By AECOM

  • `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

  • The tailoring of greenhouse gases to the clean air act – challenges for PSD and title v permitting ahead?

    In anticipation of the promulgation of Clean Air Act (CAA) regulations to control greenhouse gas (GHG) emissions, EPA published the proposed PSD and Title V GHG Tailoring Rule. The proposed GHG Tailoring Rule was published in the Federal Register on October 27, 2009 and has a 60-day public comment period; thus comments are due by December 28, 2009. The proposed GHG Tailoring Rule attempts to ...


    By Trinity Consultants

  • Evaluation of Gas Turbine Startup and Shutdown Emissions for New Source Permitting

    Utility deregulation and the increase in electrical demand have led to a surge in new gas turbine-based power projects. This paper examines the regulatory issues relating to startup/shutdown emissions, emissions profiles during gas turbine startups/shutdowns, annual emissions calculations, a methodology for evaluating the air quality impacts of startup emissions, and compliance with emission ...


    By Mostardi Platt Environmental

  • EPA Regulations Raise the Bar for Industrial Air Quality Testing

    Far-reaching environmental legislation continues to change the way Americans live, work, and run their businesses. For the past ...

  • 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 ...


    By All4 Inc.

  • New Source Permitting and Visibility: Strategies for Developers of New Emissions Sources

    Several recent developments have occurred which affect thousands of new or proposed emission sources in virtually every region of the country. These developments include the availability of new, more accurate techniques for assessing air quality impacts, and the increasing influence of Federal Land Managers (FLMs). Proposed facilities that are major emissions sources subject to Prevention of ...


    By AECOM

  • Canarina DISPER Software · air quality dispersion model · algorithms 3

      Canarina DISPER Software · air quality dispersion model   Symbol / Definition Ly= Initial plume length for Schulman-Scire downwash sources with enhanced lateral plume spread (m) Lb= Lesser of ...

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