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Serious Area PM2.5 SIP Public Participation
Read about Utah’s Serious Area PM2.5 SIP public participation where residents, businesses, and advocacy groups commented on the planning process. 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…
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Technical Analysis for Serious Area PM2.5 SIP
Technical Analysis for Serious Area PM2.5 is the scientific modeling and data analysis that support Utah’s serious area PM2.5 plans. 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…
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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.
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UPA Major Stationary Source Precursor Demonstration
Read about Utah DEQ’s regulatory interests in UPA Major Stationary Source Precursor Demonstration.
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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.
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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
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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…
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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…
