Technical Support Documents
2025
Supporting Materials Demonstrating Enhanced Ozone Concentrations in the Chicago Ozone Nonattainment Area Resulting From Canadian Wildfire Influence in 2023
Prepared by Alpine Geophysics, LLC
August 2025
2024 Ozone and Annual PM2.5 Design Values
Prepared by Alpine Geophysics, LLC
July 2025
2021-2023 Annual PM2.5 Design Value Maps - Monitored / CBSA + Kriged Counties + Headroom Maps
Prepared by Alpine Geophysics
April 14, 22025
Supporting Materials for the State of Missouri's Petition for Reconsideration of EPA's November 5, 2024, “Finding of Failure to Attain and Reclassification of the Missouri Portion of the St. Louis
Nonattainment Area as Serious for the Air Quality National Ambient Air Quality Standards”
Prepared by Alpine Geophysics, LLC
July 21, 2025
Ohio’s Exceptional Events Demonstration for the Wildfire Smoke-Driven PM2.5 Episode on July 17, 2023, in the Toledo, OH Metropolitan Statistical Area
Prepared by The Ohio Environmental Protection Agency Division of Air Pollution Control
May 2025
Technical Basis for Comments: New Source Performance Standards for Stationary Combustion Turbines and Gas Turbines; Prepared for: American Public Power Association, Midwest Ozone Group, Power Generators Air Coalition; Prepared by J. Edward Cichanowicz, Saratoga, CA; Michael Hein, Hein Analytics, LLC, Whitefish, MT;
April 14, 2025.
Review of EPA’s Use of AQAT in the Federal Implementation Plan for the 2015 Ozone NAAQS Transport Final Rule
February 5 2025
Prepared by:
Alpine Geophysics, LLC