naaqs compliance Articles

  • More Stringent SO2 NAAQS Finalized by U.S. EPA

    U.S. EPA has announced the promulgation of a new 1-hour National Ambient Air Quality Standard (NAAQS) for sulfur dioxide (SO2). The new 1-hour NAAQS level is 75 parts per billion (ppb) measured as the three year average of the 99th percentile daily 1-hour maximum concentration. The new 1-hour NAAQS is a primary standard that replaces the existing annual and 24-hour SO2 NAAQS levels. The NAAQS ...


    By All4 Inc.

  • U.S. EPA Propses Revisions to Ozone NAAQS

    In May 2008, states, environmental groups, and industry groups filed petitions with the D.C. Circuit Court of Appeals (Court) for review of the 2008 ozone standards.  In March 2009, the Court granted a U.S. EPA request to stay the litigation so that the Obama administration could review the standards and determine whether they should be reconsidered. On September 16, 2009, U.S. EPA announced ...


    By All4 Inc.

  • Tightening the Screws - Lower NAAQS Mean Higher Costs

    ALL4’s Ambient Group continues to track and provide you with updates on the latest developments related to National Ambient Air Quality Standards (NAAQS). The NAAQS are the primary basis for the permitting of new stationary sources and modifications to stationary sources in the United States. A region’s compliance status with the NAAQS dictates how new major stationary sources and ...


    By All4 Inc.

  • A Review of 1-Hour NO2 NAAQS Air Quality Modeling

    During the development of this 4TR article, proposed revisions to Appendix W to 40 CFR Part 51 – Guideline on Air Quality Models (Guideline) were published in the Federal Register. As a result of revisions which propose to establish Tier 3 nitrogen dioxide (NO2) atmospheric chemical reaction screening techniques as default methods, ...


    By All4 Inc.

  • States propose attainment designations for the new 1-hour So2 NAAQS

    The U.S. EPA revised the primary National Ambient Air Quality Standard (NAAQS) for sulfur dioxide (SO2) on June 2, 2010 by implementing a new 1-hour standard of 75 parts per billion (ppb) (calculated as the three-year average of the 99th percentile of the annual distribution of daily maximum 1-hour average concentrations). Based on an evaluation of the risks posed by acute exposure to SO2, EPA ...


    By Trinity Consultants

  • 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

  • The Difficulties With Attaining Compliance With Environmental Regulations

    If you are an environmental compliance manager today with college age children you are probably encouraging them to become dentists or orthodontists, and not to follow in your footsteps as an environmental compliance manager.  Arguably one of the toughest positions today is being responsible for managing environmental compliance at an ...


    By All4 Inc.

  • Impacts of Ozone Nonattainment Designation and Strategies for Compliance

    In 1997, the U.S. Environmental Protection Agency (U.S. EPA) revised the National Ambient Air Quality Standards (NAAQS), to include an 8-hour ozone standard. The previous 1-hour ozone standard addressed the effects of exposure to short periods of high concentrations of ground-level ozone. The intent of the new standard is to address exposure to lower ozone levels over longer durations. With the ...


    By Trinity Consultants

  • `Impacts of Ozone Nonattainment Designation and Strategies for Compliance,` presented at the 2004 AWMA annual conference

    Abstract In 1997, the U.S. Environmental Protection Agency (U.S. EPA) revised the National Ambient Air Quality Standards (NAAQS), to include an 8-hour ozone standard. The previous 1-hour ozone standard addressed the effects of exposure to short periods of high concentrations of ground-level ozone. The intent of the new standard is to address exposure to lower ozone levels over longer ...


    By Trinity Consultants

  • 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.

  • 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.

  • 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.

  • 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 ...


    By Trinity Consultants

  • EPA establishes new 1-hour standard for sulfur dioxide

    On June 2, 2010, the U.S. EPA established a new 1-hour primary National Ambient Air Quality Standard (NAAQS) for sulfur dioxide (SO2). The new 1-hour standard was set at the level of 75 parts per billion (ppb) calculated as the three-year average of the 99th percentile of the annual distribution of daily maximum 1-hour average concentrations. With the establishment of the new 1-hour SO2 standard, ...


    By Trinity Consultants

  • `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

  • 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

  • `Strategy for Complying with Air Pollution Control Regulations in the Chemical Industry,` published in Environmental Protection, October 2001

    The Clean Air Act (CAA) was originally passed by the United States Congress in 1970 and subsequently revised in 1977 for the purpose of protecting human health and the environment. In 1990, then-President George Bush signed the Clean Air Act Amendments. The far-reaching impacts of the 1990 amendments added significantly to the regulatory challenges already faced by the chemical industry. The ...


    By Trinity Consultants

  • Regulatory Update for Electric Utilities in 2011

    A1.1 Air Quality Regulatory Challenges for Power Generators in 2011 John Kinsman, Senior Director Environment, Edison Electric Institute This presentation will address air quality legislative and regulatory challenges for electric power generators in 2011, focusing upon NAAQS, ...

  • An updated response to EEI’s timeline of environmental regulations

    This fact sheet updates the analysis done in our earlier response to EEI’s timeline of environmental regulations. EPA remains on track in issuing rules that provide a path to a cleaner power fleet. After years of delay, the U.S. Environmental ...

  • Strategy for Complying with Air Pollution Control Regulations in the Chemical Industry

    Untitled Document The Clean Air Act (CAA) was originally passed by the United States Congress in 1970 and subsequently revised in 1977 for the purpose of protecting human health ...


    By Trinity Consultants

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