UDAQ is currently developing the Northern Wasatch Front (NWF) Moderate State Implementation Plan (SIP) for the 2015 8-hour ozone National Ambient Air Quality Standard. The following tabs contain the technical support documentation (TSD) pertaining to the development of the SIP and associated administrative rules. These are draft documents and are subject to change. Contact Ryan …
Read MoreThe Moderate Ozone SIP Development is very much an iterative process. The technical foundation of any SIP involves numerous emissions inventories, air quality modeling assumptions, potential emission controls, and ever-fluctuating design values recorded throughout the air monitoring network. The Ozone Implementation Rule is very prescriptive about how these numbers must fit together to comprise an …
Read MoreOzone Overview What is Ozone? Ozone in the Uinta Basin Current Air Quality Ozone is a colorless gas comprised of three oxygen atoms. It is not emitted directly into the air as a gas but is formed through a chemical reaction between nitrogen oxides (NOx) and volatile organic compounds (VOCs) in the presence of sunlight. …
Read MoreOverview Read about the Utah SIP Overview Within two years after setting or revising NAAQS for criteria pollutants, the EPA must designate areas as meeting (attainment) or not meeting (nonattainment) the air-quality standard. The EPA’s final designations are based on the most recent three years of air-quality monitoring data, recommendations from the state, and additional …
Read MoreRACT Overview Under the Clean Air Act, all areas designated Moderate nonattainment for the 2015 8-hour ozone standard are required to implement RACT for all existing major sources of VOCs or NOx (100 tons per year of either pollutant) as well as all VOC sources subject to an EPA Control Technique Guideline (CTG). A RACT …
Read MoreRACM Overview Under the Clean Air Act, all areas designated Moderate nonattainment for the 2015 8-hour ozone standard are required to implement RACM for point, area, off-road, and on-road source categories. RACM applies only to those point sources not already addressed as part of a RACT analysis. RACM implementation is required to be as expeditiously …
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Executive Director’s Office