Tag: PM2.5 (Particulate Matter)

Control Strategies:
Serious Area PM2.5 SIP

Disclaimer The Serious PM2.5 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 PM2.5 Implementation Rule is very prescriptive about how these numbers must fit together to comprise …

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Public Participation:
Serious Area PM2.5 SIP

Jump to: Public Comment Period (November 1 – November 30, 2018) Public Comment Period (October 1-October 31, 2018) Public Comment Period (July 1 – August 15) Public Comment Period (May 16 – June 16) Menu Current Air Quality Rule and Plan Changes EPA recently reclassified two of Utah’s three PM2.5 Nonattainment areas from Moderate to …

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Technical Analysis:
Serious Area PM2.5 SIP

Jump to: Background Emissions Inventories Posted Inventories Modeling Disclaimer The Serious PM2.5 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 PM2.5 Implementation Rule is very prescriptive about …

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Air Quality Researchers Hunt for PM2.5 Precursors

Researchers from DEQ, EPA, the University of Utah, Utah State University, and BYU joined forces for the Wasatch Front Ammonia and Chloride Observations (WaFACO) study. The study is looking for sources of ammonia on the Wasatch Front—a precursor to PM2.5.

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Daily Wintertime PM2.5 Speciation at Hawthorne and Smithfield

For the primary purposes of better validating Utah DAQ’s photochemical modeling, UDAQ will do more frequent speciation of wintertime PM2.5 filters. EPA’s Chemical Speciation Network (CSN) requirements specify either one-in-three or one-in-six day speciation of PM2.5 at three Utah locations (Hawthorne, Bountiful, and Lindon).

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Welcome to Air Quality Research Roadmap (AiR2), 2018!

Air2 is an opportunity to discuss, network, and make progress toward scientific solutions to Utah’s unique air quality problems with others in the local research and regulatory spheres. UDAQ will soon establish a yearly grant available to the research community.

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Public Comments Regarding Revisions to Section IX, Control Measures for Area and Point Sources, Part H, Emission Limits

See Public Participation Serious Area PM2.5 State Implementation Plan (SIP) Development for more info. Public Comments Received Big West Oil, LLC. (202 KB) Chevron (737 KB) Compass Minerals (233 KB) Environmental Protection Agency (60 KB) Heal Utah, Western Resource Advocates, Sierra Club Utah Chapter (205.2 MB) Northrop Grumman (113 KB) Rio Tinto Kennecott (22.9 MB) Tesoro Refining & Marketing Company (15 …

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Winter Inversion Study

Relevant Documentation Carbon Dioxide Tracers: University of Utah (4MB) Upper Air Observations: Weber State University (3MB) Journal Article (Silcox Paper) Scope of Work Principal Investigator: Munkhbayar Baasandorj, University of Utah/UDAQ DAQ Contact: Chris Pennell Valleys along the Wasatch Mountains (Cache, Salt Lake and Utah) experience high levels of particulate matter (PM) in winter months and …

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Great Salt Lake Ambient Hydrochloric Acid Study

Relevant Documentation Scope of Work Final Report Principal Investigator: Randy Martin, USU DAQ Contact: Nancy Daher, Ph. D. Atmospheric chlorine is a strong oxidant and known to potentially initiate photochemistry via reactions with various common hydrocarbons. Kerry et al (2013) found that chlorine atoms significantly contribute to local Salt Lake City PM2.5 during elevated wintertime …

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Refreshed Air Quality App Ready For Release

By Jared Mendenhall In December 2017, when the Wasatch Front choked on a ten-day-long inversion that clogged the valleys with PM2.5 pollution, more than 50,000 Utah residents stayed on top of air-quality conditions by using the Utah Department of Environmental Quality’s (DEQ) mobile app: UtahAir. UtahAir delivers hourly air-quality data for two pollutants, PM2.5 and …

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DEQ Budget Priorities 2018: Putting Our Values into Action

By Scott Baird The 2018 Utah Legislature kicks off its 45-day session today, marking the start of an exciting and occasionally hectic time for all of us at the Utah Department of Environmental Quality (DEQ). Although we are neutral players in the legislative process, our directors and scientists are available 24/7 to answer questions, provide …

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