MISSISSIPPI
DEPARTMENT OF ENVIRONMENTAL QUALITY
                          OFFICE OF POLLUTION CONTROL
                                       
                                       
                               TECHNICAL SUPPORT
                                   DOCUMENT
                                       
                               ATTENDANT TO THE 
         STATE IMPLEMENTATION PLAN (SIP) REVISION FOR PURPOSES OF THE
                                       
              EMISSIONS STATEMENT AND EMISSIONS INVENTORY FOR THE
            OZONE NONATTAINMENT AREA OF DESOTO COUNTY, MISSISSIPPI
                                       
                                       
                           ADOPTED NOVEMBER 20, 2014
                                       
	TABLE OF CONTENTS

Discussion	Page 3

Purpose of the Revision.	Page 3

Sources Affected by the Revision.	Page 3

Pollutants Involved.	Page 4

Changes in Allowable Emissions.	Page 4

Location/Attainment Status.	Page 4

Part D SIP/Attainment Demonstration Impact.	Page 4

Air Quality Impacts.	Page 4

Modeling.	Page 4

Compliance Methods to be Employed.	Page 4

Public Comment Period.	Page 4

Response to Comments on Proposed SIP Revision.	Page 5

Regulation Changes.	Page 5

Final Adoption of SIP Revision.	Page 5


	ATTACHMENTS

Regulations in EPA format	Attachment 1
  11 Miss. Admin. Code, Part 2, Chapter 11

Proofs of Publication.	Attachment 2
  Notice of Public Comment Period
  Proofs of Publication

Final Adoption Evidence.	Attachment 3
  Commission Order
  Secretary of State Filing Form


DISCUSSION:

      The purpose of this State Implementation Plan (SIP) Revision is to implement Sections 182(a)(1) and 182(a)(3) of the Clean Air Act (CAA), as amended (42 United States Code (U.S.C.) 7401 et seq.), with respect to the requirements for an Emissions Statement and an Emissions Inventory for the Ozone Nonattainment Area of DeSoto County, Mississippi.  

PURPOSE OF THE REVISION:

      The purpose of this State Implementation Plan (SIP) Revision is to implement Sections 182(a)(1) and 182(a)(3) of the Clean Air Act (CAA), as amended (42 United States Code (U.S.C.) 7401 et seq.), with respect to the requirements for an Emissions Statement and an Emissions Inventory for the Ozone Nonattainment Area of DeSoto County, Mississippi.  
      
      Section 182(a)(3)(B) of the CAA requires Marginal and above areas to submit an emissions statement within 2 years of designation as nonattainment.  Specifically it provides that the emissions statement must: "...require that the owner or operator of each stationary source of oxides of nitrogen or volatile organic compounds provide the state with a statement, in such form as the Administrator may prescribe (or an equivalent alternative developed by the state), for classes or categories of sources, showing the actual emissions of oxides of nitrogen and volatile organic compounds from that source.  The first such statement shall be submitted within 3 years after the date of the enactment of the CAA Amendments of 1990. Subsequent statements shall be submitted at least every year thereafter."  Appendix U contains new state regulations which will implement the Emissions Statement requirement for any areas designated as nonattainment for the National Air Quality Standard for ground-level ozone.  The new regulations are 11 Mississippi Administrative Code, Part 2, Chapter 11, Regulations for Ambient Air Quality Nonattainment Areas.  The regulations are applicable to sources in DeSoto County, Mississippi as well as any other areas that might be designated nonattainment in the future.
      
      CAA section 182(a)(1) requires that Marginal and above ozone nonattainment areas submit a base year emissions inventory for the nonattainment area 2 years after designation as nonattainment.  The emissions are reported as tons/average summer day of pollutant.  In accordance with the requirements of EPA's Emissions Inventory Guidance for Implementation of Ozone and Particulate Matter National Ambient Air Quality Standards (NAAQS) and Regional Haze Regulations, November 2005, the only pollutants reported are Nitrogen Oxides (NOx) and Volatile Organic Compounds (VOC) and emissions are summed as tons/average summer day for the year 2011.  Appendix V contains the Emission Inventory for DeSoto County, Mississippi.

SOURCES AFFECTED BY THE REVISION:
                                          
      This SIP revision potentially affects all sources and practices subject to air pollution control regulations in Mississippi.

POLLUTANTS INVOLVED:

      The pollutants affected by this SIP Revision are all pollutants for which the U.S. Environmental Agency has promulgated a National Ambient Air Quality Standard (NAAQS).  

CHANGES IN ALLOWABLE EMISSIONS:

      This SIP Revision does not include any provisions for emission limitation changes.  

LOCATION/ATTAINMENT STATUS:

      The northern portion of DeSoto County, Mississippi has been classified as Marginal Non-attainment for the 2008 National Ambient Air Quality Standard (NAAQS) for Ozone.  All other areas of the state are designated attainment for all NAAQS.  

PART D SIP/ATTAINMENT DEMONSTRATION IMPACT:

      This SIP Revision conforms with the requirements of Section 182(a)(3)(B) and Section 182(a)(1) of the Federal Clean Air Act.

AIR QUALITY IMPACTS:

      This SIP Revision will have no adverse impact on air quality.

MODELING:

      No modeling is necessary for this SIP Revision.

COMPLIANCE METHODS TO BE EMPLOYED:

      No compliance methodology is applicable to this SIP Revison.

PUBLIC HEARING:

      Public participation on the SIP Revision was achieved by a public hearing held on October 2, 2014, at 10:30 a.m. in the Commission Hearing Room (Room 104A) of the Mississippi Department of Environmental Quality Office Building located at 515 E. Amite Street, Jackson, Mississippi 39201 in accordance with the information provided in the public notice and Mississippi Administrative Procedures Act.  The notice for public hearing was published consistent with procedures approved by EPA. 
      
      The notice of public hearing was published on September 2, September 9, and September 16, 2014, in daily newspapers in the cities of Gulfport, Hernando, Jackson, and Tupelo in the State of Mississippi.  The notice of public hearing, the proposed SIP revision, and proposed amendments to state air pollution control regulations were made available for public review in the main branches of the public libraries in Gulfport, Hernando, and Tupelo and at the Mississippi Department of Environmental Quality, 515 E. Amite St., Jackson, Mississippi, 39201 and was also available on the Department's website http://www.deq.state.ms.us.  The public notice was also mailed to persons on the air pollution control regulation mailing list.
      
      TSD Attachment 2 contains a copy of the notice of public hearing and copies of proofs of publication of the notice of public hearing.

RESPONSE TO COMMENTS ON PLAN REVISION:

      No comments regarding the SIP Revision other than from EPA were received during the public comment period.  Changes suggested by EPA were incorporated into the SIP Revision.  Attachment 3 contains the EPA comment letter.

REGULATION CHANGES:

      Appendix U of the SIP Revision contains new state regulations which will implement the Emissions Statement requirement for any areas designated as nonattainment for the National Air Quality Standard for ground-level ozone.  The new regulations are 11 Mississippi Administrative Code, Part 2, Chapter 11, Regulations for Ambient Air Quality Nonattainment Areas.  The regulations are applicable to sources in DeSoto County, Mississippi as well as any other areas that might be designated nonattainment in the future. See TSD Attachment 1.  

FINAL ADOPTION OF PLAN REVISION:

      TSD Attachment 4 contains evidence of final adoption of the SIP revision.  


ATTACHMENT 1

REGULATIONS IN EPA FORMATATTACHMENT 2

                           NOTICE OF PUBLIC HEARING
                             PROOFS OF PUBLICATION
ATTACHMENT 3
                                       
EPA COMMENT LETTER
                                 ATTACHMENT 4
                                       
             EVIDENCE OF ADOPTION OF SIP REVISION AND REGULATIONS
