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HGB: Latest Ozone Planning Activities

Latest events and activities related to the Houston-Galveston-Brazoria (HGB) area’s compliance with the National Ambient Air Quality Standards (NAAQS) for ground-level ozone.

Last updated: 10/1/2014

New August 26, 2011 One-Hour Ozone Exceptional Event Technical Support Document Submitted to EPA

On September 30, 2014 the TCEQ submitted a technical support document to the U.S. EPA Region 6 office in Dallas, Texas. This document supports the commission’s conclusion that large wildfires in the Northwestern and Southeastern United States caused an exceedance of the one-hour ozone NAAQS on August 26, 2011 at the Houston East (CAMS 1) monitoring site. Emissions from numerous fires in these two regions transported to the Houston area and caused an exceedance of the one-hour ozone NAAQS that would not otherwise have occurred.

Under current federal rules, the U.S. EPA will now evaluate the submittal and decide whether to concur or not. If the U.S. EPA concurs with Texas’ conclusions then ozone measurements made at the Houston East monitoring site on August 26, 2011 will not be compared to the ozone NAAQS for determinations of compliance or noncompliance with ozone NAAQS.

 

Redesignation Substitute (RS) Report for the HGB One-Hour Ozone Nonattainment Area

On July 22, 2014, the TCEQ submitted the RS Report for the HGB One-Hour Ozone Standard Nonattainment Area to the United States Environmental Protection Agency (EPA). This report fulfills the EPA’s redesignation substitute requirements in its Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation Plan Requirements; Proposed Rule (78 FR 34178) to lift anti-backsliding obligations for the revoked one-hour ozone NAAQS by ensuring that specific redesignation requirements are met for the HGB area under the revoked standard. According to EPA’s proposed 2008 ozone standard SIP requirements rule, this report is based on certain Federal Clean Air Act (FCAA) redesignation criteria and includes: monitoring data showing attainment of the revoked one-hour ozone NAAQS; a showing that attainment was due to permanent and enforceable emissions reductions; and a demonstration that the area can maintain the standard through 2026 via emissions inventory trends and future emission projections.

 

Emissions Inventory (EI) SIP Revision for the 2008 Eight-Hour Ozone Standard for the HGB and Dallas-Fort Worth (DFW) Areas

On July 2, 2014, the commission adopted the EI SIP revision for the 2008 Eight-Hour Ozone Standard (Non-Rule Project No. 2013-016-SIP-NR). This SIP revision satisfies the FCAA, §172 and §182 requirements for the HGB and DFW nonattainment areas under the 2008 eight-hour ozone standard. The SIP revision includes 2011 emissions inventories for ozone precursors (volatile organic compounds and nitrogen oxides) from point, area, on-road mobile, non-road mobile, and biogenic emissions source categories as the base year emissions inventories for the HGB and DFW areas.

For additional information, please visit the Air Pollution from Ozone Web page.

HGB 1997 Eight-Hour Ozone Standard Nonattainment Area MVEB Update SIP Revision

On April 23, 2013, the commission adopted the HGB 1997 Eight-Hour Ozone Standard Nonattainment Area Motor Vehicle Emissions Budgets (MVEB) Update State Implementation Plan (SIP) Revision. This SIP revision updates the March 2010 HGB attainment demonstration and reasonable further progress (RFP) SIP revisions for the 1997 eight-hour ozone standard by replacing the on-road mobile source emissions inventories for nitrogen oxides (NOX) and volatile organic compounds (VOC) based on the EPA's MOBILE model with those based on the EPA’s Motor Vehicle Emission Simulator (MOVES) model. The 2008, 2011, 2014, 2017, and 2018 NOX and VOC MVEBs and the contingency analyses are also updated using the MOVES-based emissions inventories. Updated on-road inventories and emissions analysis based on the EPA’s August 30, 2012 vehicle miles traveled offset guidance and a modified version of the MOVES model, MOVES2010bROP, demonstrate compliance with Federal Clean Air Act requirements for transportation control measures in severe nonattainment areas. A review of emissions inventory data, photochemical modeling, and the quantitative and qualitative corroborative analyses used as weight of evidence in this SIP revision supports the March 2010 HGB attainment demonstration. This SIP revision meets the primary obligation of the mid-course review commitment in the March 2010 HGB attainment demonstration by demonstrating that the outstanding 3% contingency requirement is fulfilled.

HGB RACT Analysis Update SIP Revision Adopted December 7, 2011

On December 7, 2011, the commission adopted the HGB Reasonably Available Control Technology (RACT) Analysis Update SIP Revision for the 1997 Eight-Hour Ozone Standard to include Control Techniques Guidelines (CTG) documents that were not addressed in the March 2010 HGB Attainment Demonstration SIP revision for the 1997 Eight-Hour Ozone Standard. This SIP revision also incorporated CTG-related rulemaking for the HGB area (Project No. 2012-028-SIP-NR)

HGB Attainment Demonstration and Reasonable Further Progress SIP Revisions Adopted March 10, 2010

On March 10, 2010, the commission adopted two revisions to the Texas SIP for the HGB nonattainment area for the 1997 eight-hour ozone standard: the HGB Attainment Demonstration SIP Revision for the 1997 Eight-Hour Ozone Standard and the HGB Reasonable Further Progress SIP Revision for the 1997 Eight-Hour Ozone Standard. The commission also adopted associated rule projects revising 30 Texas Administrative Code, Chapters 101 and 115, which address cap integrity in the Mass Emissions Cap and Trade (MECT) program, a cap reduction and allowance reallocation for the Highly Reactive Volatile Organic Compounds (HRVOC) Emissions Cap and Trade (HECT) program, and an update to CTGs for VOC used in offset printing. (Project Nos. 2009-017-SIP-NR/2009-018-SIP-NR)

For more information on the SIP revisions for the 1997 eight-hour ozone standard HGB severe nonattainment area, including downloadable Portable Document Format (PDF) documents, please visit the SIP Revisions: Houston-Galveston-Brazoria, March 10, 2010, December 7, 2011, and April 23, 2013 Web page.