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
Mississippi NAA SIP, Final

Adopted November 20, 2014

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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
Mississippi NAA SIP, Final

Adopted November 20, 2014

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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.

 
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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.
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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. 
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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.
Mississippi NAA SIP, Final

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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.
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5.24 Control Strategy for the SIP Revision

No control strategy is required for this SIP Revision.
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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.
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14.1.23 Health Effects of the SIP Revision

No adverse health effects are expected to be caused by this SIP revision. 
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14.3.23 Economics Effects of the SIP Revision

No adverse economic effects due to this SIP revision are foreseen.
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Adopted November 20, 2014

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14.5.23 Social Effects of the SIP Revision

No adverse social effects are foreseen as a result of this SIP revision. 
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14.6.23 Air Quality Effects of the SIP Revision

This SIP revision will not have any adverse air quality effects.
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Adopted November 20, 2014

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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 NAA SIP, Final

Adopted November 20, 2014

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MISSISSIPPI COMMISSION ON ENVIRONMENTAL QUALITY

REGULATIONS FOR AMBIENT AIR QUALITY NONATTAINMENT AREAS

11 Mississippi Administrative Code, Part 2, Chapter 11

Adopted November 20, 2014
Mississippi NAA SIP, Final

Adopted November 20, 2014

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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. 
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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 NAA SIP, Final

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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
Mississippi NAA SIP, Final

Adopted November 20, 2014

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Appendix V

Emissions Inventory for DeSoto County, Mississippi
Mississippi NAA SIP, Final

Adopted November 20, 2014

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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
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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
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**

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
Mississippi NAA SIP, Final

Adopted November 20, 2014

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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
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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
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Adopted November 20, 2014

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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
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Waste Disposal, Treatment, and Recovery 0.12234563

Open Burning 0.12234563

All Categories 0.09576861

Residential 0.02657702

Grand Total 1.26712195
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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
Mississippi NAA SIP, Final

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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
Mississippi NAA SIP, Final

Adopted November 20, 2014

29

2011 NONROAD MOBILE SOURCE EMISSIONS

Non-road sources are vehicles that normally operate off-road/off-highway and not on-road/onhighway. 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
Mississippi NAA SIP, Final

Adopted November 20, 2014

30

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
Mississippi NAA SIP, Final

Adopted November 20, 2014

31

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

0.64853067
Mississippi NAA SIP, Final

Adopted November 20, 2014

32

Lawn and Garden Equipment

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
Mississippi NAA SIP, Final

Adopted November 20, 2014

33

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