sulfur dioxide national ambient air quality standard Articles

  • 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.

  • 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

  • National Air Pollutant Emission Trends, 1900-1998

     Executive Summary What information is presented in this report? This report presents the United States (U.S.) Environmental Protection Agency’s (EPA) latest estimates of national emissions for criteria air pollutants: carbon monoxide (CO), nitrogen oxides (NOX ), volatile organic compounds (VOC), sulfur dioxide (SO2 ), particulate matter (PM) less than 10 ...

  • 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

  • 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.

  • `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

  • 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

  • Return of the clean air interstate rule—The court does CAIR

    In summer 2008, the U.S. Court of Appeals for the D.C. Circuit issued a dramatic decision to vacate the Clean Air Interstate Rule (CAIR) in its entirety (North Carolina v. EPA, No. 05-1244, D.C. Cir., July 11, 2008). Following a petition for rehearing, it seems the previous vacatur was just a temporary detour, as the Court reinstated CAIR on December 22, 2008. The reinstatement appears to turn ...


    By Trinity Consultants

  • Plantwide Applicability Limits (PALs): A Legitimate Alternative to Major New Source Review Permitting

    Plantwide Applicability Limits: A Legitimate Alternative to Major New Source Review Permitting. There have been a number of recent developments regarding U.S. EPA"s interpretation of the major New Source Review (NSR) air permitting rules that are related to the NSR Reform provisions of December 2002.  When these new interpretations are considered in combination with the promulgation of ...


    By All4 Inc.

  • Urgent CAIR needed

    On July 11, 2008, the US Court of Appeals for the District of Columbia Circuit vacated (overturned) the US Clean Air Interstate Rule (CAIR). Adopted in 2005, CAIR was a centerpiece of the US Environmental Protection Agency’s (EPA) strategy to reduce multiple pollutants from major stationary sources. CAIR was expected to reduce power plant emissions in 28 eastern states and the District of ...

  • 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.

  • 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.

  • SO2 NAAQS Implementation: The Great American Update

    Since the 1-hour sulfur dioxide (SO2) National Ambient Air Quality Standard (NAAQS) became effective in August 2010, ALL4 has been tracking it every step of the way.  Its implementation has proven to be chaotic at times and quiet at others.  As we are ramping up into our air regulatory reporting obligations for 2014, U.S. EPA’s implementation of the ...


    By All4 Inc.

  • PSD and the Dreaded Major Modification

    The implementation at the state level of the major New Source Review (NSR) rules that include both prevention of significant deterioration (PSD) and nonattainment new source review (NNSR) have evolved over  a long period of time.   During the last decade that evolution has been substantially impacted by the ...


    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

  • Geothermal Energy... Power from the Depths

    The Earth's crust is a bountiful source of energy—and fossil fuels are only part of the story. Heat or thermal energy is by far the more abundant resource. To put it in perspective, the thermal energy in the uppermost six miles of the Earth's crust amounts to 50,000 times the energy of all oil and gas resources in the world! The word 'geothermal' literally means 'Earth' plus 'heat.' ...

  • The shifting sands of GHG regulation

    So far this year, there have been significant developments on U.S. climate change policy, including movement toward mandatory reporting and regulation of greenhouse gas (GHG) emissions at the federal level via either a cap-and-trade program or possibly existing Clean Air Act mechanisms. While the specifics are still uncertain regarding how these regulatory developments and legislative actions ...


    By Trinity Consultants

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you