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…

  • Public Participation:
    Serious Area PM2.5 SIP

    EPA reclassified two of Utah’s three PM2.5 Nonattainment areas from Moderate to Serious. The State must comply with additional requirements for its PM2.5 State Implementation Plan (SIPs) as a result of this reclassification. Under these new requirements, the State has reviewed its air-quality rules for area, point, and mobile sources and implemented Best Available Control…

  • Technical Analysis:
    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…

  • Revisions to Previously Proposed Section IX, Control Measures for Area and Point Sources, Part H, Emission Limits

    Read about Utah DEQ’s regulatory interests in Revisions to Previously Proposed Section IX, Control Measures for Area and Point Sources, Part H, Emission Limits.

  • UPA Major Stationary Source Precursor Demonstration

    Read about Utah DEQ’s regulatory interests in UPA Major Stationary Source Precursor Demonstration.

  • Section IX, Control Measures for Area and Point Sources, Part A.31, Fine Particulate Matter

    Read about Utah DEQ’s regulatory interests in Section IX, Control Measures for Area and Point Sources, Part A.31, Fine Particulate Matter.

  • 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).

  • 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

  • Winter Inversion Study

    Valleys along the Wasatch Mountains (Cache, Salt Lake and Utah) experience high levels of particulate matter (PM) in winter months and are currently designated as non-attainment area for particulate matter with diameters less than 2.5 micron (PM2.5). The chemical aspects of these pollution episodes are not well characterized. In order to fill in this gap…

  • Great Salt Lake Ambient Hydrochloric Acid Study

    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 episodes with ammonium chloride accounting for 10-15% of the PM2.5 mass. In order quantify the concentrations of local…

  • Tier 3 Standards Will Help Clean Utah Air

     By Glade Sowards There’s been a lot of buzz in Utah lately about Tier 3—shorthand for the Environmental Protection Agency’s (EPA’s) Tier 3 Vehicle Emission and Fuel Standards Program. When a geeky name like Tier 3 becomes a household word that’s used not only by us policy wonks but by Governor Herbert, mayors, legislators, radio…

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