Document ID: EPA-R04-OAR-2015-0247-0007
Agency: epa
Document Type: Supporting & Related Material
Title: 
Posted Date: 2015-07-02T04:00Z

MISSISSIPPI
                      DEPARTMENT OF ENVIRONMENTAL QUALITY
OFFICE OF POLLUTION CONTROL
                                       
                                       
         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
                                       
1.57	Introduction: State Implementation Plan (SIP) Revision for Purposes of the Emissions Statement and Emissions Inventory for the Ozone Nonattainment Area of DeSoto County, Mississippi

1.58	Notification of Public Hearing for the SIP Revision

3.26	Legal Authority for the SIP Revision

5.24	Control Strategy for the SIP Revision

6.28	Control Regulations for the SIP Revision

14.1.23	Health Effects of the SIP Revision

14.3.23	Economic Effects of the SIP Revision

14.5.23	Social Effects of the SIP Revision

14.6.23	Air Quality Effects of the SIP Revision

Appendix U	Regulations for Ambient Air Quality Nonattainment Areas 
                  Mississippi Administrative Code, Part 2, Chapter 11

Appendix V	Emissions Inventory for DeSoto County, Mississippi

1.57	Introduction: State Implementation Plan (SIP) Revision for Purposes of the Emissions Statement and Emissions Inventory for the Ozone Nonattainment Area of DeSoto County, Mississippi.

      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.
        
1.58	Notification of Public Comment Period for the SIP Revision.

      Public participation for the above referenced SIP Revision was achieved by a 30-day public comment period and with a public hearing held on October 2, 2014 in the city of Jackson, Mississippi.  The comment period began on September 2, 2014 and ended on October 2, 2014.  The public notice was published consistent with procedures approved by EPA. 
      
      The notice of public comment period 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, and the draft SIP Revision was made available for public review in the main branches of the public libraries in Gulfport, Hernando, and Tupelo, Mississippi and at the Mississippi Department of Environmental Quality in Jackson, Mississippi and was also available on the Department's website http://www.deq.state.ms.us.  
      The public notice follows this page.
                MISSISSIPPI COMMISSION ON ENVIRONMENTAL QUALITY
                           NOTICE OF PUBLIC HEARING
                                       
                  PUBLIC NOTICE START DATE: SEPTEMBER 2, 2014
                    DEADLINE FOR COMMENTS: OCTOBER 2, 2014
                                       
PLEASE TAKE NOTE that the Mississippi Commission on Environmental Quality ("Commission") is considering adopting a State Implementation Plan Revision for Purposes of an Emissions Inventory for the Ozone Nonattainment Area of DeSoto County, Mississippi and  adopting new air pollution control regulations for areas in Mississippi designated as Nonattainment for Federal National Ambient Air Quality Standards (NAAQS).  The new proposed regulations will be entitled 11 Mississippi Administrative Code, Part 2, Chapter 11, "Regulations for Ambient Air Quality Nonattainment Areas" and will be applicable statewide. 

I.	Substance of the proposed action:

On July 22, 2012, the United States Environmental Protection Agency (EPA) designated a portion of DeSoto County, Mississippi to be included as a part of the Memphis, Tennessee  -  Mississippi  -  Arkansas (TN-MS-AR) Marginal Ozone Nonattainment Area.  Therefore, the Mississippi Department of Environmental Quality (MDEQ) is required by the Clean Air Act (CAA) to implement requirements for certain air emission sources in Nonattainment Areas to submit an Emissions Statement annually.  The Department is also required to submit an Emissions Inventory of sources in the nonattainment portion of DeSoto County, Mississippi.  Section 182(a)(3)(B) of the (CAA) requires that within two (2) years of enactment of the CAA Amendments of 1990, states submit to EPA a SIP submittal requiring sources in their marginal and above ozone nonattainment areas to submit annual emissions statements.  CAA section 182(a)(1) requires that marginal and above ozone nonattainment areas submit a base year emission inventory of ozone precursors for the nonattainment area two(2) years after designation.  

The Department is proposing to adopt a State Implementation Plan Revision (SIP Revision) which includes adoption of new air pollution control regulations specifically for the purposes of implementing federal requirements for areas designated as nonattainment for National Ambient Air Quality Standards (NAAQS).  The proposed new air pollution control regulations are entitled 11 Mississippi Administrative Code, Part 2, Chapter 11, "Regulations for Ambient Air Quality Nonattainment Areas".  The regulations will be applicable to sources in DeSoto County, Mississippi as well as any other areas in Mississippi that may be designated nonattainment for air quality in the future.  The proposed SIP Revision also includes the required emissions inventory for DeSoto County, Mississippi.

II.	Manner By Which the Public May Comment.

Copies of the proposed SIP Revision and proposed regulations may be obtained by calling Mr. Keith Head at 601-961-5577 or writing to Mississippi Department of Environmental Quality, Air Division, P.O. Box 2261, Jackson, Mississippi 39201.  For persons with internet access, the proposed SIP Revision and proposed regulations may be found on the Mississippi Department of Environmental Quality's website at http://www.deq.state.ms.us under Programs/Air Quality/New Information.  Also, the proposed SIP Revision and proposed regulations will be available for public review through October 2, 2014, in the main branch of the public library in Gulfport, Hernando, and Tupelo, Mississippi.  The proposed SIP Revision and proposed regulations may also be reviewed in the offices of the Mississippi Department of Environmental Quality, 515 E. Amite Street, Jackson, Mississippi.  Please contact Mr. Lorenzo Boddie at (601) 961-5171 to schedule an appointment. 

Members of the public may present verbal or written comments at the public hearing described below.  Also, written statements regarding the proposed SIP Revision and/or proposed regulations will be made part of the public hearing record if delivered by 5:00 p.m., October 2, 2014, to the attention of Ms. Maya Rao at the address shown above.

III.	Notice of Public Hearing.

A public hearing to receive comments regarding the proposed SIP Revision and proposed regulations will be held on October 2, 2014, at 10:30 a.m., in Room 104A at the offices of the Mississippi Department of Environmental Quality, 515 E. Amite St., Jackson, Mississippi 39201.

IV.	Additional Information.

For additional information, please contact Mr. Keith Head at 601-961-5577.
3.26	Legal Authority for the SIP Revision
            
      No legislative actions are needed concerning this SIP revision.  The State of Mississippi Air & Water Pollution Control Law, Section 49-17-1 to 49-17-43, Mississippi Code of 1972, gives the Commission on Environmental Quality the necessary legal authority to adopt and implement this SIP revision.  The State act (as of July 1, 2011) Mississippi Code Annotated, Sections 49-17-13(3) and 49-17-17(h) & (i) designates the Commission as the State air pollution control agency for all purposes of the federal pollution control legislation and programs and take all actions necessary thereto.  The state air pollution control law as of July 1, 2011, is included in Appendix A-9 of the Mississippi State Implementation Plan.

5.24	Control Strategy for the SIP Revision

      No control strategy is required for this SIP Revision.

6.28	Control Regulations for the SIP Revision

      New state air pollution control regulations will implement the Emissions Statement requirement for any areas designated as nonattainment for the National Air Quality Standard (NAAQS) 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.  The regulations were adopted by the Mississippi Commission on Environmental Quality on November 20, 2014 and became state effective on December 22, 2014.  The regulations are included in Appendix U of this SIP Revision.

14.1.23	Health Effects of the SIP Revision

            No adverse health effects are expected to be caused by this SIP revision. 

14.3.23	Economics Effects of the SIP Revision

            No adverse economic effects due to this SIP revision are foreseen.

14.5.23	Social Effects of the SIP Revision

            No adverse social effects are foreseen as a result of this SIP revision.  

14.6.23	Air Quality Effects of the SIP Revision

            This SIP revision will not have any adverse air quality effects.

                                       
                MISSISSIPPI DEPARTMENT OF ENVIRONMENTAL QUALITY
                          OFFICE OF POLLUTION CONTROL
                                       
                                       
                                       
            STATE IMPLEMENTATION PLAN REVISION FOR PURPOSES OF THE
                                       
              EMISSIONS STATEMENT AND EMISSIONS INVENTORY FOR THE
            OZONE NONATTAINMENT AREA OF DESOTO COUNTY, MISSISSIPPI
                                       
                                       
                                  APPENDIX U
            REGULATIONS FOR AMBIENT AIR QUALITY NONATTAINMENT AREAS
            11 Mississippi Administrative Code, Part 2, Chapter 11
                           Adopted November 20, 2014
                          EFFECTIVE DECEMBER 22, 2014
                MISSISSIPPI COMMISSION ON ENVIRONMENTAL QUALITY
                                       
                                       
            REGULATIONS FOR AMBIENT AIR QUALITY NONATTAINMENT AREAS
                                       
            11 Mississippi Administrative Code, Part 2, Chapter 11
                                       
                           Adopted November 20, 2014
                                       
                                       
                                       

Title 11:  Mississippi Department of Environmental Quality

Part 2:  Air Regulations

Part 2, Chapter 11:  Mississippi Commission on Environmental Quality, Regulations for Ambient Air Quality Nonattainment Areas (Adopted November 20, 2014)
                                       
                                       
                               TABLE OF CONTENTS

Rule 11.1 General	Page 1

Rule 11.2 Definitions	Page 1

Rule 11.3 Emissions Statement	Page 2

Title 11:  Mississippi Department of Environmental Quality

Part 2:  Air Regulations

Part 2, Chapter 11:  Mississippi Commission on Environmental Quality, Regulations for Ambient Air Quality Nonattainment Areas 

Rule 11.1 General.  The purpose of this regulation is to implement Section 182(a)(3)(B)  of the Federal Clean Air Act which sets requirements for areas designated as nonattainment for National Ambient Air Quality Standards.

Source: Miss. Code Ann. §§ 49-2-9(1)(b), 49-17-17, 49-2-1, et seq. and 49-17-1, et seq.

Rule 11.2 Definitions.  The terms used in the regulations shall, unless the context otherwise requires, have the following meanings:

      A. "Commission" means the Mississippi Commission on Environmental Quality.
         
      B. "Department" means the Mississippi Department of Environmental Quality (Department).
         
      C. "NAAQS" means National Ambient Air Quality Standards promulgated by the U.S. Environmental Protection Agency.

      D. "Nonattainment area" means any area, designated by the U.S. Environmental Protection Agency, that does not meet (or that contributes to ambient air quality in a nearby area that does not meet) the national primary or secondary national ambient air quality standard(s).
         
      E. "Emissions Statement" means the annual emissions statement as required by Rule 11.3 of this regulation. 

Source: Miss. Code Ann. §§ 49-2-9(1)(b), 49-17-17, 49-2-1, et seq. and 49-17-1, et seq.
         
Rule 11.3 Emissions Statement.  

      A. The requirements of Rule 11.3.A-C of this regulation shall apply to all stationary sources of nitrogen oxides or volatile organic compounds which have the potential to emit more than 100 tons per calendar year of either pollutant and are located in area(s) designated by the U.S. Environmental Protection Agency as nonattainment for the 2008 ozone NAAQS.
         
      B. Owners and operators of stationary sources of nitrogen oxides or volatile organic compounds shall provide the Department with a statement, in such form as the Department may prescribe, for classes or categories of sources determined by the Department, showing the actual emissions of nitrogen oxides and volatile organic compounds from that source.

      C. The Emissions Statement shall be submitted to the Department by July 1 of every year and shall show the actual emissions of the previous calendar year.

Source: Miss. Code Ann. §§ 49-2-9(1)(b), 49-17-17, 49-2-1, et seq. and 49-17-1, et seq.  

                MISSISSIPPI DEPARTMENT OF ENVIRONMENTAL QUALITY
                          OFFICE OF POLLUTION CONTROL
                                       
                                       
                                       
            STATE IMPLEMENTATION PLAN REVISION FOR PURPOSES OF THE
                                       
              EMISSIONS STATEMENT AND EMISSIONS INVENTORY FOR THE
            OZONE NONATTAINMENT AREA OF DESOTO COUNTY, MISSISSIPPI
                                       
                                       
                                  APPENDIX V
           EMISSIONS INVENTORY FOR THE OZONE NONATTAINMENT AREA OF 
                           DESOTO COUNTY, MISSISSIPI
APPENDIX V
                                       
              Emissions Inventory for DeSoto County, Mississippi
                                 INTRODUCTION
The following contains emission summary tables for DeSoto County, MS, which is part of the Memphis Ozone Nonattainment Area.  The inventory data is for calendar year.  

BASELINE YEAR (2011) INVENTORIES
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.

Table 1: 2011 Average Summer Day Emissions for DeSoto County, MS
Sector
2011 Summer Day 
NOX Emissions (tons/day)
2011 Summer Day 
VOC Emissions (tons/day)
Point
  1.533
  0.817
Nonpoint 
(excluding Biogenic)
  1.267
  7.062
Nonroad Mobile
  2.054
  1.658
Onroad Mobile
  8.969
  5.178
TOTAL
13.847
14.734

Table 2: 2011 Average Summer Day Biogenic Emissions for DeSoto County, MS
Location
2011 Summer Day 
NOX Emissions (tons/day)
2011 Summer Day 
VOC Emissions (tons/day)
Total
0.574
25.280

2011 POINT SOURCE INVENTORY
The development of the point source inventory by the Department began with the collection of actual 2011 process data and emission estimates from all Title V stationary sources that are required to submit inventory data according to the Air Emissions Reporting Rule (AERR).  Each 2011 inventory received was reviewed by the Department's staff to ensure that correct procedures were followed and appropriate emission factors, such as stack testing or AP-42 emission factors, were used in developing the inventory.  The Department submitted the 2011 point data to the EPA as part of the 2011 NEI effort.  The EPA did make some amendments to the Department's data, but primarily to "gap fill" pollutants or sources not provided by agencies.

To estimate the average summer day emissions for industrial point sources, the MDEQ used monthly throughput percentages provided by the facilities.  The airport point source inventory was developed from data provided by the EPA.  It was assumed that these sources operated at a constant rate throughout all months of the year (8.333% activity for each month).  If each month of the year contributed 8.333% of the activity, the percent of activity for the 5 ozone season months would be 41.66%. Since there are 153 days in the 2011 ozone season, the 41.66% can be divided by 153 to get an estimate of activity for an average ozone season day.  This gives a result of 0.272% activity for each day.  The estimated ratio of 0.00272 was multiplied by the annual emissions to estimate the average summer day emissions.  The data was reviewed by the Department's staff and updated as necessary.

Table 3: 2011 Average Summer Day Point Source NOX Emissions for DeSoto County, MS
SOURCE
                                                           EMISSIONS (tons/day)

Davis Field
                                                                               
                                                                     0.00000870
Aircraft /General Aviation /Piston

                                                                     0.00000870
                                                                               
Delta Flying Service Inc
                                                                     0.00001345
Aircraft /General Aviation /Piston

                                                                     0.00001345
                                                                               
Double O Ranch
                                                                     0.00000870
Aircraft /General Aviation /Piston

                                                                     0.00000870
                                                                               
Eagles Ridge
                                                                     0.00000929
Aircraft /General Aviation /Piston

                                                                     0.00000929
                                                                               
Guardian Fiberglass  Inc
                                                                     0.00747945
Mineral Wool /Curing Oven
                                                                     0.00227397
Mineral Wool /Other Not Classified
                                                                     0.00446575
Misc Manuf / Indus Processes /Other Not Classified

                                                                     0.00073973
                                                                               
Hernando Village Airpark, Inc
                                                                     0.00027454
Aircraft /General Aviation /Piston
                                                                     0.00009369
Aircraft /General Aviation /Turbine

                                                                     0.00018084
                                                                               
J T Shannon Lumber Company
                                                                     0.03726027
Ext Comb /Industrial /Wood-fired Boiler (< 50,000 Lb Steam) **
                                                                     0.03665753
Pulp&Paper&Wood /Fugitive Emissions

                                                                     0.00060274
                                                                               
Olive Branch Airport
                                                                     0.00815270
Aircraft /Air Taxi /Piston
                                                                     0.00011311
Aircraft /Air Taxi /Turbine
                                                                     0.00198767
Aircraft /Commercial Aircraft /Total: All Types
                                                                     0.00003817
Aircraft /General Aviation /Piston
                                                                     0.00202440
Aircraft /General Aviation /Turbine
                                                                     0.00390753
Aircraft /Military Aircraft /Total

                                                                     0.00008181
                                                                               
Rexam Beverage Can Company Inc
                                                                     0.01471233
Ext Comb /Industrial /Natural Gas /< 10 Million Btu/hr
                                                                     0.00178082
Metal Can Coating /Interior Spray Coating
                                                                     0.00561644
Surface Coating Oven - General /Baked : 175F **
                                                                     0.00336986
Surface Coating Oven - General /Dried < 175F **

                                                                     0.00394521
                                                                               
Rite Hite Products
                                                                     0.00019178
Surface Coating Oven - General /General

                                                                     0.00019178
                                                                               
Texas Gas Transmission LLC, Lake Cormorant Compressor Station
                                                                     1.01731507
Ext Comb /Space Heater /Industrial /Natural Gas
                                                                     0.00000000
Int Comb /Industrial /Natural Gas /2-cycle Lean Burn
                                                                     0.21131507
Int Comb /Industrial /Natural Gas /4-cycle Rich Burn
                                                                     0.23728767
Int Comb /Industrial /Natural Gas /Reciprocating
                                                                     0.00054795
Int Comb /Industrial /Natural Gas /Turbine
                                                                     0.56690411
Petrol Indus /Process Heaters /Natural Gas-fired

                                                                     0.00126027
                                                                               
TVA Southaven Combined Cycle Plant
                                                                     0.44786904
Ext Comb /Electric Gen /Natural Gas /Boilers < 100 Million Btu/hr 
                                                                     0.00010959
Int Comb /Electric Gen /Distillate Oil (Diesel) /Reciprocating
                                                                     0.00010959
Int Comb /Electric Gen /Natural Gas /Reciprocating
                                                                     0.00136986
Int Comb /Electric Gen /Natural Gas /Turbine

                                                                     0.44628000
                                                                               
Vaiden Landing
                                                                     0.00000870
Aircraft /General Aviation /Piston

                                                                     0.00000870
                                                                               
Grand Total
                                                                     1.53330402

Table 4: 2011 Average Summer Day Point Source VOC Emissions for DeSoto County, MS
SOURCE
                                                           EMISSIONS (tons/day)

Davis Field
                                                                               
                                                                     0.00002013
Aircraft /General Aviation /Piston

                                                                     0.00002013
                                                                               
Delta Flying Service Inc
                                                                     0.00003113
Aircraft /General Aviation /Piston

                                                                     0.00003113
                                                                               
Double O Ranch
                                                                     0.00002013
Aircraft /General Aviation /Piston

                                                                     0.00002013
                                                                               
Eagles Ridge
                                                                     0.00002151
Aircraft /General Aviation /Piston

                                                                     0.00002151
                                                                               
Guardian Fiberglass  Inc
                                                                     0.08134247
Mineral Wool /Curing Oven
                                                                     0.00863014
Mineral Wool /Other Not Classified
                                                                     0.07268493
Misc Manuf / Indus Processes /Other Not Classified

                                                                     0.00002740
                                                                               
Hernando Village Airpark, Inc
                                                                     0.00060204
Aircraft /General Aviation /Piston
                                                                     0.00021689
Aircraft /General Aviation /Turbine

                                                                     0.00038515
                                                                               
J T Shannon Lumber Company
                                                                     0.03947945
Ext Comb /Industrial /Wood-fired Boiler (< 50,000 Lb Steam) **
                                                                     0.00564384
Plywood Operations /Veneer Dryer: Steam Heated: Redry
                                                                     0.03260274
Pulp&Paper&Wood /Fugitive Emissions 
                                                                     0.00123288
Wood Furniture Surface Coating /Coating Operation

                                                                     0.00000000
                                                                               
Olive Branch Airport
                                                                     0.01645603
Aircraft /Air Taxi /Piston
                                                                     0.00012147
Aircraft /Air Taxi /Turbine
                                                                     0.00257863
Aircraft /Commercial Aircraft /Total: All Types
                                                                     0.00001267
Aircraft /General Aviation /Piston
                                                                     0.00468647
Aircraft /General Aviation /Turbine
                                                                     0.00832197
Aircraft /Military Aircraft /Total

                                                                     0.00073482
                                                                               
Rexam Beverage Can Company Inc
                                                                     0.52282192
Ext Comb /Industrial /Natural Gas /< 10 Million Btu/hr
                                                                     0.00010959
Metal Can Coating /Interior Spray Coating
                                                                     0.09671233
Metal Can Coating /Two-piece Can Coating Line
                                                                     0.02983562
Surface Coating Oven - General /Baked : 175F **
                                                                     0.23490411
Surface Coating Oven - General /Dried < 175F **

                                                                     0.16126027
                                                                               
Rite Hite Products
                                                                     0.06967123
Surface Coating /Misc Metal Parts /Coating Operation
                                                                     0.06967123
Surface Coating Oven - General /General

                                                                     0.00000000
                                                                               
Texas Gas Transmission LLC, Lake Cormorant Compressor Station
                                                                     0.05063014
Ext Comb /Space Heater /Industrial /Natural Gas
                                                                     0.00000000
Int Comb /Industrial /Natural Gas /2-cycle Lean Burn
                                                                     0.02775342
Int Comb /Industrial /Natural Gas /4-cycle Rich Burn
                                                                     0.00169863
Int Comb /Industrial /Natural Gas /Reciprocating
                                                                     0.00016438
Int Comb /Industrial /Natural Gas /Turbine
                                                                     0.01578082
Oil&Gas Field Stor&Workg Tanks /Fixed Roof Tank: Breathing Loss
                                                                     0.00117808
Oil&Gas Prod /Fugitive Emissions /Fugitive Emissions
                                                                     0.00397260
Petrol Indus /Process Heaters /Natural Gas-fired

                                                                     0.00008219
                                                                               
TVA Southaven Combined Cycle Plant
                                                                     0.03553040
Ext Comb /Electric Gen /Natural Gas /Boilers < 100 Million Btu/hr 
                                                                     0.00002740
Int Comb /Electric Gen /Distillate Oil (Diesel) /Reciprocating
                                                                     0.00000000
Int Comb /Electric Gen /Natural Gas /Reciprocating
                                                                     0.00024658
Int Comb /Electric Gen /Natural Gas /Turbine

                                                                     0.03525643
                                                                               
Vaiden Landing
                                                                     0.00002013
Aircraft /General Aviation /Piston

                                                                     0.00002013
                                                                               
Grand Total
                                                                     0.81664672
2011 NONPOINT EMISSION INVENTORY

Nonpoint sources include emissions estimates from sources that are either too small or too numerous to be considered point sources which are calculated and recorded on the county-level.  Major categories for nonpoint sources include: Solvent use such as small surface coating operations, light industrial/commercial sources such as commercial bakeries, product storage and transport distribution such as gasoline, stationary source fuel combustion such as residential fuel combustion, waste management such as landfills, agriculture such as feedlots and crop burning, and miscellaneous area sources such as unpaved roads. 

Emissions from nonpoint sources are calculated using established emissions factors provided by EPA.  Activity data adjustments are made to address some issues when estimating emissions.  These issues include coal data, nonroad mobile source consumption, non-fuel use, and point source adjustment.  These adjustments are made to prevent emissions from being double counted.  Average summer day emissions were calculated by summing the monthly emissions for the five summer months (May, June, July, August and September) and dividing the sum by the number of 2011 summer days (153 days).

Table 5: 2011 Average Summer Day Nonpoint Source NOX Emissions for DeSoto County, MS
SOURCE
EMISSIONS (tons/day)

Miscellaneous Area Sources
                                                                     0.04905490
Agriculture Production - Crops - as nonpoint
                                                                     0.04742749
Agricultural Field Burning - whole field set on fire
                                                                     0.04742749
Other Combustion
                                                                     0.00162741
Cremation
                                                                     0.00162741

Mobile Sources
                                                                     0.76162629
Marine Vessels, Commercial
                                                                     0.23370515
Diesel
                                                                     0.23370515
Railroad Equipment
                                                                     0.52792114
Diesel
                                                                     0.52792114

Stationary Source Fuel Combustion
                                                                     0.33409513
Commercial/Institutional
                                                                     0.12328876
Distillate Oil
                                                                     0.00772843
Kerosene
                                                                     0.00002964
Natural Gas
                                                                     0.11553069
Residual Oil
                                                                     0.00000000
Residential
                                                                     0.21080637
Distillate Oil
                                                                     0.00000211
Kerosene
                                                                     0.00021792
Liquified Petroleum Gas (LPG)
                                                                     0.03218718
Natural Gas
                                                                     0.17839916

                                                                               
Waste Disposal, Treatment, and Recovery
                                                                     0.12234563
Open Burning
                                                                     0.12234563
All Categories
                                                                     0.09576861
Residential

                                                                     0.02657702
                                                                               
Grand Total
                                                                     1.26712195

Table 6: 2011 Average Summer Day Nonpoint Source VOC Emissions for DeSoto County, MS
SOURCE 
EMISSIONS (tons/day)

Industrial Processes
                                                                     0.01682328
Food and Kindred Products: SIC 20
                                                                     0.01682328
Commercial Cooking - Charbroiling
                                                                     0.01370096
Commercial Cooking - Frying
                                                                     0.00312232
Oil and Gas Exploration and Production
                                                                     0.00000000

Miscellaneous Area Sources
                                                                     0.08674551
Agriculture Production - Crops - as nonpoint
                                                                     0.08673982
Agricultural Field Burning - whole field set on fire
                                                                     0.08673982
Other Combustion
                                                                     0.00000570
Cremation
                                                                     0.00000570

Mobile Sources
                                                                     0.03078418
Marine Vessels, Commercial
                                                                     0.00534635
Diesel
                                                                     0.00534635
Railroad Equipment
                                                                     0.02543783
Diesel
                                                                     0.02543783

Solvent Utilization
                                                                     3.67860931
Dry Cleaning
                                                                     0.00856252
All Processes
                                                                     0.00856252
Miscellaneous Non-industrial: Commercial
                                                                     0.41860053
Cutback Asphalt
                                                                     0.00594787
Emulsified Asphalt
                                                                     0.10812257
Pesticide Application: Agricultural
                                                                     0.30453010
Miscellaneous Non-industrial: Consumer and Commercial
                                                                     1.84052970
All Adhesives and Sealants
                                                                     0.12444850
All Automotive Aftermarket Products
                                                                     0.29693025
All Coatings and Related Products
                                                                     0.20741371
All FIFRA Related Products
                                                                     0.38862940
All Household Products
                                                                     0.39299596
All Personal Care Products
                                                                     0.41482877
Miscellaneous Products (Not Otherwise Covered)
                                                                     0.01528310
Surface Coating
                                                                     1.41091656
Architectural Coatings
                                                                     0.51089448
Auto Refinishing: SIC 7532
                                                                     0.09743783
Factory Finished Wood: SIC 2426 thru 242
                                                                     0.00982093
Industrial Maintenance Coatings
                                                                     0.13168020
Machinery and Equipment: SIC 35
                                                                     0.00967028
Metal Cans: SIC 341
                                                                     0.51953418
Miscellaneous Manufacturing
                                                                     0.01589212
Motor Vehicles: SIC 371
                                                                     0.04831651
Other Special Purpose Coatings
                                                                     0.01397313
Traffic Markings
                                                                     0.00047305
Wood Furniture: SIC 25
                                                                     0.05322385

Stationary Source Fuel Combustion
                                                                     0.01798586
Commercial/Institutional
                                                                     0.00635891
Distillate Oil
                                                                     0.00000421
Kerosene
                                                                     0.00000051
Natural Gas
                                                                     0.00635419
Residual Oil
                                                                     0.00000000
Residential
                                                                     0.01162695
Distillate Oil
                                                                     0.00000008
Kerosene
                                                                     0.00000847
Liquified Petroleum Gas (LPG)
                                                                     0.00118014
Natural Gas
                                                                     0.01043826

Storage and Transport
                                                                     2.96048240
Petroleum and Petroleum Product Storage
                                                                     2.90592752
Airports : Aviation Gasoline
                                                                     0.08309806
Bulk Plants: All Evaporative Losses
                                                                     0.01494301
Bulk Terminals: All Evaporative Losses
                                                                     0.07063269
Commercial Portable Gas Cans
                                                                     0.05656611
Diesel Service Stations
                                                                     0.01724552
Gasoline Service Stations
                                                                     2.08759070
Residential Portable Gas Cans
                                                                     0.57585142
Petroleum and Petroleum Product Transport
                                                                     0.05455489
Pipeline
                                                                     0.04772428
Truck
                                                                     0.00683060

Waste Disposal, Treatment, and Recovery
                                                                     0.27017927
Open Burning
                                                                     0.26222945
All Categories
                                                                     0.22431280
Residential
                                                                     0.03791665
Wastewater Treatment
                                                                     0.00794982
Public Owned

                                                                     0.00794982
                                                                               
Grand Total
                                                                     7.06160981
2011 NONROAD MOBILE SOURCE EMISSIONS

Non-road sources are vehicles that normally operate off-road/off-highway and not on-road/on-highway.  Non-road emissions source category include: agricultural equipment, construction and mining equipment, lawn and garden equipment, off-road recreational equipment, and drilling rigs.  The nonroad mobile emissions are derived from the 2011 National Emissions Inventory (NEI).  

Aircraft engine emissions occurring during landing & takeoff operations and the ground support equipment & auxiliary power units (APU) associated with the aircraft are included in the point source category at individual airports.  In-flight aircraft emissions, locomotive emissions outside of the rail yards, and commercial marine vessel emissions (both underway and port emissions) are included in the Non-Point source category.  

The NEI Onroad and Nonroad source categories contain mobile sources which are estimated by EPA for the 2011 NEI by the MOVES2010b and NONROAD models, respectively.  NONROAD model was run within the National Mobile Inventory Model (NMIM).  Locomotives and commercial marine vessels are estimated for the 2011 NEI by the NONROAD model even though the emission sources are not included in the Non-road source category.  Average summer day emissions were calculated by summing the monthly emissions for the five summer months (May, June, July, August and September) and dividing the sum by the number of 2011 summer days (153 days).

Table 7: 2011 Average Summer Day Nonroad Mobile Source NOX Emissions for DeSoto County, MS
SOURCE 
EMISSIONS (tons/day)

Agricultural Equipment
                                                                     0.30226753
CNG
                                                                     0.00001974
LPG
                                                                     0.00000741
Off-highway Vehicle Diesel
                                                                     0.29943755
Off-highway Vehicle Gasoline, 2-Stroke
                                                                     0.00000835
Off-highway Vehicle Gasoline, 4-Stroke
                                                                     0.00279448

Commercial Equipment
                                                                     0.07627228
CNG
                                                                     0.00189779
LPG
                                                                     0.00678624
Off-highway Vehicle Diesel
                                                                     0.04515341
Off-highway Vehicle Gasoline, 2-Stroke
                                                                     0.00023142
Off-highway Vehicle Gasoline, 4-Stroke
                                                                     0.02220342

Construction and Mining Equipment
                                                                     1.19317638
CNG
                                                                     0.00001114
LPG
                                                                     0.00269760
Off-highway Vehicle Diesel
                                                                     1.18137270
Off-highway Vehicle Gasoline, 2-Stroke
                                                                     0.00066563
Off-highway Vehicle Gasoline, 4-Stroke
                                                                     0.00842932

Diesel
                                                                     0.03848557
Pleasure Craft
                                                                     0.03202211
Railroad Equipment
                                                                     0.00646346

Gasoline 2-Stroke
                                                                     0.04666039
Pleasure Craft
                                                                     0.04666039

Gasoline 4-Stroke
                                                                     0.03383171
Pleasure Craft
                                                                     0.03383171

Gasoline, 4-Stroke
                                                                     0.00010834
Railroad Equipment
                                                                     0.00010834

Industrial Equipment
                                                                     0.20962257
CNG
                                                                     0.00650724
LPG
                                                                     0.09332167
Off-highway Vehicle Diesel
                                                                     0.10574633
Off-highway Vehicle Gasoline, 2-Stroke
                                                                     0.00000190
Off-highway Vehicle Gasoline, 4-Stroke
                                                                     0.00404544

Lawn and Garden Equipment
                                                                     0.14839911
LPG
                                                                     0.00096174
Off-highway Vehicle Diesel
                                                                     0.04699066
Off-highway Vehicle Gasoline, 2-Stroke
                                                                     0.00623248
Off-highway Vehicle Gasoline, 4-Stroke
                                                                     0.09421423

Logging Equipment
                                                                     0.00091504
Off-highway Vehicle Diesel
                                                                     0.00086412
Off-highway Vehicle Gasoline, 2-Stroke
                                                                     0.00000950
Off-highway Vehicle Gasoline, 4-Stroke
                                                                     0.00004142

LPG
                                                                     0.00000989
Railroad Equipment
                                                                     0.00000989

Recreational Equipment
                                                                     0.00453567
Off-highway Vehicle Gasoline, 4-Stroke

                                                                     0.00453567
                                                                               
Grand Total
                                                                     2.05428448

Table 8: 2011 Average Summer Day Nonroad Mobile Source VOC Emissions for DeSoto County, MS
SOURCE 
EMISSIONS (tons/day)

Agricultural Equipment
                                                                     0.03405710
CNG
                                                                     0.00000034
LPG
                                                                     0.00000204
Off-highway Vehicle Diesel
                                                                     0.02764850
Off-highway Vehicle Gasoline, 2-Stroke
                                                                     0.00019627
Off-highway Vehicle Gasoline, 4-Stroke
                                                                     0.00620995

Commercial Equipment
                                                                     0.09490516
CNG
                                                                     0.00002230
LPG
                                                                     0.00147151
Off-highway Vehicle Diesel
                                                                     0.00601515
Off-highway Vehicle Gasoline, 2-Stroke
                                                                     0.00688193
Off-highway Vehicle Gasoline, 4-Stroke
                                                                     0.08051427

Construction and Mining Equipment
                                                                     0.17111009
CNG
                                                                     0.00000018
LPG
                                                                     0.00074012
Off-highway Vehicle Diesel
                                                                     0.12016380
Off-highway Vehicle Gasoline, 2-Stroke
                                                                     0.02740862
Off-highway Vehicle Gasoline, 4-Stroke
                                                                     0.02279737

Diesel
                                                                     0.00257838
Pleasure Craft
                                                                     0.00146368
Railroad Equipment
                                                                     0.00111470

Gasoline 2-Stroke
                                                                     0.60474498
Pleasure Craft
                                                                     0.60474498

Gasoline 4-Stroke
                                                                     0.04684050
Pleasure Craft
                                                                     0.04684050

Gasoline, 4-Stroke
                                                                     0.00032780
Railroad Equipment
                                                                     0.00032780

Industrial Equipment
                                                                     0.03961546
CNG
                                                                     0.00010618
LPG
                                                                     0.02574198
Off-highway Vehicle Diesel
                                                                     0.00903846
Off-highway Vehicle Gasoline, 2-Stroke
                                                                     0.00004860
Off-highway Vehicle Gasoline, 4-Stroke
                                                                     0.00468024

Lawn and Garden Equipment
                                                                     0.64853067
LPG
                                                                     0.00026127
Off-highway Vehicle Diesel
                                                                     0.00487374
Off-highway Vehicle Gasoline, 2-Stroke
                                                                     0.22118678
Off-highway Vehicle Gasoline, 4-Stroke
                                                                     0.42220888

Logging Equipment
                                                                     0.00065292
Off-highway Vehicle Diesel
                                                                     0.00006655
Off-highway Vehicle Gasoline, 2-Stroke
                                                                     0.00044958
Off-highway Vehicle Gasoline, 4-Stroke
                                                                     0.00013679

LPG
                                                                     0.00000276
Railroad Equipment
                                                                     0.00000276

Recreational Equipment
                                                                     0.01418106
Off-highway Vehicle Gasoline, 4-Stroke

                                                                     0.01418106
                                                                               
Grand Total
                                                                     1.65754687

2011 ONROAD MOBILE EMISSIONS

The following section contains onroad mobile inventory documentation for the portion of DeSoto County that is within Memphis Ozone Nonattainment Area.  The inventory data is for calendar year 2011.  The DeSoto County emissions inventory was developed by the Memphis Urban Area Metropolitan Planning Organization (MPO), with input from MDEQ and others, as part of the 2040 Desoto County Nonattainment Area Moves Air Quality Conformity Demonstration (March 2013).  To calculate the average summer day emissions, the MPO modeled weekday emissions in July.

Onroad mobile sources are sources of pollution caused by vehicles transporting goods or people on public roadways.  This includes passenger cars, motorcycles, minivans, sport-utility vehicles, light-duty trucks, heavy-duty trucks, and buses. The sectors include emissions from parking areas as well as emissions while the vehicles are moving.

Table 9: 2011 Average Summer Day Onroad Mobile Source Emissions for DeSoto County, MS

Source Type
                               Source Type Code
                                NOx (tons/day)
                                VOC (tons/day)
Motorcycle
                                      11
                                     0.010
                                     0.102
Passenger Car
                                      21
                                     3.677
                                     2.985
Passenger Truck
                                      31
                                     1.907
                                     1.451
Light Commercial Truck
                                      32
                                     0.540
                                     0.298
Intercity Bus
                                      41
                                     0.023
                                     0.001
Transit Bus
                                      42
                                     0.005
                                     0.000
School Bus
                                      43
                                     0.015
                                     0.003
Refuse Truck
                                      51
                                     0.027
                                     0.002
Single Unit Short-haul Truck
                                      52
                                     0.594
                                     0.146
Single Unit Long-haul Truck
                                      53
                                     0.073
                                     0.019
Motor Home
                                      54
                                     0.042
                                     0.022
Combination Short-haul Truck
                                      61
                                     0.754
                                     0.040
Combination Long-haul Truck
                                      62
                                     1.302
                                     0.109
Total
                                       
                                     8.969
                                     5.178