May 12, 2011

Ms. Gwendolyn Keyes Fleming

Regional Administrator

U.S. Environmental Protection Agency

61 Forsyth Street, S.W.

Atlanta, Georgia 30303-3 104

Dear Ms. Fleming:

Re: Mississippi SIP Revision and amendments to state air regulations

Enclosed are rulemaking documents related to a State Implementation Plan (SIP) Revision and

amendments to state air pollution control regulations. We are transmitting, under separate cover,

additional copies to Dick Schutt of your agency.On April 28, 2011, the Mississippi Commission on Environmental Quality adopted a SIP Revision

and associated state air pollution control regulations to incorporate federal requirements for fine

particulate matter (PM2.5). The enclosed SIP Revision updates Mississippi’s incorporation by

reference in “Regulations for the Prevention of Significant Deterioration ofAir Quality”, APC-S-5 to

adopt regulatory changes as promulgated in 40 CFR Parts 51.166 and 52.21 in order to make the

state Prevention of Significant Deterioration of Air Quality (P SD) permitting program consistent

with federal requirements for PM2.5. Specifically, the amendments incorporate federal provisionsrelating to implementing the New Source Review (NSR) program for PM2.5 that was promulgated

by EPA on May 16, 2008, and the PM2.5 Increments, Significant Impact Levels (SILs) and

Significant Monitoring Concentration (SMC) promulgated on October 20, 2010.

We certify that this SIP revision and the regulation amendments have been completed in accordance

with the Mississippi Administrative Procedures Act and the Mississippi Pollution Control Law. We

further certify that a public hearing was held to receive comments regarding the SIP Revision.

We feel that this SIP revision submittal is complete. Therefore, we are requesting EPA approval of

these regulation changes into the federally approved Mississippi State Implementation Plan.

OFFICE OF POLLUTION CONTROL

POST OFFICE Box 2261 JACKSON, MIssISSIPPI 39225-2261 TEL: (601) 961-5171 • FAx: (601) 354-6612 • www.deq.state.ms.Ias

AN EQUAL OPPORTUNITY EMPLOYER
(601) 961-5242.

Very truly yours,

Executive Director

TDF/cjs

Enclosures

cc: Ms. Beverly Banister, EPA Region IV
MISSISSIPPI 

DEPARTMENT OF ENVIRONMENTAL QUALITY 

OFFICE OF POLLUTION CONTROL 

STATE IMPLEMENTATION PLAN (SIP) 

REVISION 

REGARDING REQUIREMENTS OF THE FEDERAL NATIONAL AMBIENT AIR 

QUALITY STANDARD FOR FINE PARTICULATE MATTER (PM2.5) AS IT 

PERTAINS TO 

PREVENTION OF SIGNIFICANT DETERIORATION OF AIR QUALITY 

INCLUDING AMENDMENTS TO 

“REGULATIONS FOR THE PREVENTION OF SIGNIFICANT DETERIORATION OF 

AIR QUALITY” APC-S-5 

ADOPTED APRIL 28, 2011
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

2

TABLE OF CONTENTS 

1.49 Introduction: State Implementation Plan (SIP) Revision Regarding Requirements of 

the Federal National Ambient Air Quality Standard for Fine Particulate Matter 

(PM2.5) As It Pertains to the Prevention of Significant Deterioration of Air Quality 

(PSD). 

1.50 Notification of Public Hearing for the Proposed SIP Revision 

3.22 Legal Authority for the SIP Revision 

5.20 Control Strategy for the SIP Revision 

6.24 Control Regulations for the SIP Revision 

14.1.19 Health Effects of the SIP Revision 

14.3.19 Economic Effects of the SIP Revision 

14.5.19 Social Effects of the SIP Revision 

14.6.19 Air Quality Effects of the SIP Revision 

Appendix C-22 Amendments to “Regulations for the Prevention of Significant Deterioration 

of Air Quality”, APC-S-5 

Appendix C-23 Technical demonstration of NOx Insignificance 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

3

1.49 Introduction: State Implementation Plan (SIP) Revision Regarding Requirements of the 

Federal National Ambient Air Quality Standard for Fine Particulate Matter (PM2.5) As It 

Pertains to the Prevention of Significant Deterioration of Air Quality (PSD).

The regulation amendments involve amendments to “Regulations for the Prevention of 

Significant Deterioration of Air Quality”, APC-S-5 to adopt, by reference, updated relevant 

portions of federal regulations as promulgated in 40 CFR Parts 51.166, 52.21, and 52.22 in 

order to make the state Prevention of Significant Deterioration of Air Quality permitting 

program consistent with the federal requirements. Specifically, the amendments incorporate 

federal provisions relating to implementing the New Source Review (NSR) program for fine 

particulate matter that was promulgated by EPA on May 16, 2008, and the PM2.5 Increments, 

Significant Impact Levels (SILs) and Significant Monitoring Concentration (SMC) 

promulgated on October 20, 2010. Amendments to APC-S-5 were adopted on April 28, 

2011, by the Mississippi Commission on Environmental Quality. The amendments will 

become state effective June 2, 2011 which is 30 days after final filing with the State of 

Mississippi Secretary of State which occurred May 3, 2011 

EPA’s 2008 NSR PM2.5 Implementation Rule (73 FR 28321) identifies nitrogen oxides 

(NOx) as a presumed precursor to PM2.5 in all attainment and unclassifiable areas, unless the 

State demonstrates to the Administrator's satisfaction or EPA demonstrates that emissions of 

NOx from sources in a specific area are not a significant contributor to that area's ambient 

PM2.5 concentrations. Appendix C-23 of the proposed SIP revision contains a technical 

demonstration which shows that NOx from sources in the state do not significantly 

contribute to PM2.5 ambient air concentrations in Mississippi. Mississippi is submitting this 

technical demonstration to U.S. EPA for approval as part of the PM2.5 5 NSR 

Implementation SIP package. Mississippi is adopting the PM2.5 provisions into APC-S-5 by 

reference. Depending upon the final action from US EPA, we will address NOx as a PM2.5

precursor as follows: 

1. Until such a time where EPA takes action on the demonstration or upon plan 

disapproval, NOx will be considered as a precursor for PM2.5 in Mississippi. 

2. Upon EPA approval of this demonstration, NOx will not be considered as a precursor 

for PM PM2.5 in Mississippi. 

There were no comments received at the public hearing held April 21, 2011. The US 

Environmental Agency submitted comments regarded the SIP provision. One comment 

requested that that Mississippi consider removing the grandfathering provisions for PM2.5 

from our adoption by reference, since EPA will very shortly repeal this provision. The 

Commission did include a provision in the approved regulation which excludes the 

grandfathering provision for PM2.5. EPA also commented that the technical demonstration 

for NOx insignificance as a precursor for PM2.5 was still under review and has not been 

approved. Since the technical demonstration has not been approved, NOx is considered a 

precursor for PM2.5 at this time. No other comments were received. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

4

1.50 Notification of Public Hearing for Proposed SIP Revision.

Public participation on the SIP Revision will be achieved by a public hearing scheduled for 

Thursday, April 21, 2011, at 2:30 p.m. in the Commission Hearing Room (Room 104A) of 

the Mississippi Department of Environmental Quality Office Building located at 515 E. 

Amite Street, Jackson, Mississippi 39201 in accordance with the information provided in the 

public notice and Mississippi Administrative Procedures Act. The notice for public hearing 

will be published consistent with procedures approved by EPA. 

The notice of public hearing was published on March 22, March 29, and April 5, 2011, in 

daily newspapers in the cities of Gulfport, Jackson, and Tupelo in the State of Mississippi. 

The notice of public hearing, the proposed SIP revision, and proposed amendments to state 

air pollution control regulations were made available for public review in the main branches 

of the public libraries in the above mentioned cities and at the Mississippi Department of 

Environmental Quality, 515 E. Amite St., Jackson, Mississippi, 39201 and also was available 

on the Department’s website http://www.deq.state.ms.us. The public notice was also mailed 

to persons on the air pollution control regulation mailing list. 

The notice of public hearing follows this page. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

5

MISSISSIPPI COMMISSION ON ENVIRONMENTAL QUALITY 

NOTICE OF PROPOSED RULEMAKING 

NOTICE OF PUBLIC HEARING 

PUBLIC NOTICE START DATE: MARCH 22, 2011 

 

PLEASE TAKE NOTE that the Mississippi Commission on Environmental Quality (“Commission”) 

is considering a Revision to the State Implementation Plan for Air Pollution Control (SIP Revision) 

and amendments to state air pollution control regulations. The proposed SIP Revision and 

regulation amendments will be applicable statewide. 

I. The proposed SIP Revision and amendments to state air pollution control regulations involve 

amendments to “Regulations for the Prevention of Significant Deterioration of Air Quality”, 

APC-S-5 to adopt, by reference, updated relevant portions of federal regulations as 

promulgated in 40 CFR Parts 51.166, 52.21, and 52.22 to make the state Prevention of 

Significant Deterioration of Air Quality permitting program consistent with the federal 

requirements. Specifically, the proposed amendments will incorporate federal provisions 

relating to implementing the New Source Review (NSR) program for fine particulate matter 

(PM2.5) that was promulgated by EPA on May 16, 2008 and the PM2.5 Increments, 

Significant Impact Levels (SILs) and Significant Monitoring Concentration (SMC) 

promulgated on October 20, 2010. 

 EPA’s 2008 NSR PM2.5 Implementation Rule (73 FR 28321) identifies nitrogen oxides 

(NOx) as a presumed precursor to PM2.5 in all attainment and unclassifiable areas, unless 

the State demonstrates to the Administrator's satisfaction or EPA demonstrates that 

emissions of NOx from sources in a specific area are not a significant contributor to that 

area's ambient PM2.5 concentrations. The draft SIP revision contains a technical 

demonstration which shows that NOx from sources in the state do not significantly 

contribute to PM2.5 ambient air concentrations in Mississippi. Mississippi proposes to 

submit this technical demonstration to U.S. EPA for approval as part of the PM2.5 NSR 

Implementation SIP package. Mississippi is proposing to adopt the PM2.5 provisions into 

APC-S-5 by reference. Depending upon the final action from US EPA, we are proposing to 

address NOx as a PM2.5 precursor as follows: 

1. Until such a time where EPA takes action on the demonstration or upon plan 

disapproval, NOx will be considered as a precursor for PM2.5 in Mississippi. 

2. Upon EPA approval of this demonstration, NOx will not be considered as a precursor 

for PM2.5 in Mississippi. 

Mississippi is specifically soliciting comments on the appropriateness of including or 

excluding NOx as a PM2.5 precursor for PSD purposes. 

II. Manner By Which the Public May Comment. 

Copies of the proposed amendments to the referenced regulations may be obtained by calling 

Ms. Maya Rao at 601-961-5242 or Mr. Connie Simmons at 601-961-5165 or writing to 

Mississippi Department of Environmental Quality, Air Division, P.O. Box 2261, Jackson, 

Mississippi 39201. For persons with internet access, a copy of the proposed SIP revision 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

6

and proposed amendments to the referenced regulations may be found on the Mississippi 

Department of Environmental Quality’s website at http://www.deq.state.ms.us. Also, copies 

of the proposed SIP Revision and proposed amendments to the referenced regulations will be 

available for public review through Thursday, April 21, 2011, in the main branch of public 

libraries in the cities of Gulfport, Jackson, and Tupelo in the State of Mississippi. The 

proposed SIP Revision and amendments to the referenced regulations may also be reviewed 

in the offices of the Mississippi Department of Environmental Quality, 515 E. Amite Street, 

Jackson, Mississippi. Please contact Ms. Edna Banks 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 proposed 

regulation amendments will be made part of the public hearing record if delivered by 5:00 

p.m., Thursday, April 21, 2011, to the attention of Ms. Maya Rao at the address shown 

above. 

III. Notice of Public Hearing. 

A public hearing to receive comments concerning the proposed SIP Revision and regulation 

amendments will be conducted. The hearing will be held on Thursday, April 21, 2011, at 

2:30 p.m. in the Commission Hearing Room (Room 104A) of the Mississippi Department of 

Environmental Quality Office Building located at 515 E. Amite Street, Jackson, Mississippi 

39201. 

IV. Additional Information. 

For additional information, please contact Ms. Maya Rao at 601-961-5242 or Mr. Connie 

Simmons at 601-961-5165. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

7

3.22 Legal Authority for the SIP Revision

No legislative actions were 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 proposed SIP revision. The State act (as of July 1, 2010) Mississippi Code 

Annotated, Section 49-17-13(3) 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. 

Public participation on the proposed SIP revision was achieved by a public hearing held on 

April 21, 2011. The public hearing was held at 2:30 p.m., Thursday, April 21, 2011, in the 

Commission Hearing Room (Room 104A) of the Mississippi Department of Environmental 

Quality Office Building located at 515 E. Amite Street, Jackson, Mississippi 39201. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

8

5.20 Control Strategy for the SIP Revision

This SIP revision includes amendments to air pollution control regulations which are control 

regulations and control strategies. Therefore, no additional control strategies are needed. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

9

6.24 Control Regulations for the SIP Revision

Amended state regulation APC-S-5 is included in Appendix C-22 of this SIP revision. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

10

14.1.19 Health Effects of the SIP Revision

No adverse health effects are expected to be caused by this SIP revision. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

11

14.3.19 Economics Effects of the SIP Revision

No adverse economic effects due to this SIP revision are foreseen. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

12

14.5.19 Social Effects of the SIP Revision

No adverse social effects are foreseen as a result of this SIP revision. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

13

14.6.19 Air Quality Effects of the SIP Revision

This SIP revision will not have any adverse air quality effects. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

14

MISSISSIPPI DEPARTMENT OF ENVIRONMENTAL QUALITY 

OFFICE OF POLLUTION CONTROL 

STATE IMPLEMENTATION PLAN REVISION 

APPENDIX C-22 

AMENDMENTS TO 

“REGULATIONS FOR THE PREVENTION OF SIGNIFICANT 

DETERIORATION OF AIR QUALITY” 

APC-S-5 

AMENDED APRIL 28, 2011
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

15

MISSISSIPPI COMMISSION ON ENVIRONMENTAL QUALITY

“REGULATIONS FOR THE PREVENTION OF SIGNIFICANT DETERIORATION OF AIR 

QUALITY” 

APC-S-5 

AMENDED APRIL 28, 2011 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

16

MISSISSIPPI COMMISSION ON ENVIRONMENTAL QUALITY 

REGULATIONS FOR THE PREVENTION OF SIGNIFICANT DETERIORATION 

OF AIR QUALITY 

APC-S-5 

Adopted June 28, 1990 

Amended April 25, 1991 

Amended December 9, 1993 

Amended August 22, 1996 

Amended July 28, 2005 

Amended August 23, 2007 

Amended October 28, 2010 

Amended April 28, 2011 

1. The purpose of this regulation is to implement a program for the prevention of significant 

deterioration of air quality as required by 40 CFR 51.166. This regulation supercedes and 

replaces the previous adoption by reference of 40 CFR 52.21 and 40 CFR 51.166. 

40 CFR 52.21 and 51.166 as used in this regulation refer to the federal regulations as 

amended and promulgated by March 22, 2011, except as provided in 2. below. CFR refers to 

the “Code of Federal Regulations”. 

2. Other than the subsections and phrases listed below and except for the changes set forth in 

Section 3. of this regulation, the provisions of 40 CFR 52.21 as amended and promulgated by 

March 22, 2011, are incorporated herein and adopted by reference by the Mississippi 

Commission on Environmental Quality as official regulations of the State of Mississippi and 

shall hereafter be enforceable as such. The following subsection and phrases of 40 CFR 

52.21 are excluded from this regulation: 

2.1 (a) [Plan disapproval], 

2.2 (q) [Public Participation], 

2.3 (s) [Environmental Impact Statement], 

2.4 (u) [Delegation of authority], 

2.5 (cc) [Routine maintenance, repair, and replacement], and 

2.6 The phrase “in circumstances where there is a reasonable possibility, within the 

meaning of paragraph (r)(6)(vi) of 40 CFR 52.21, that a project that is not a part of a 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

17

major modification may result in a significant emissions increase” in paragraph (r)(6) 

of (r) [Source obligation]. 

2.7 (i)(1)(xi) [Exemptions; PM2.5 in complete PSD applications received prior to July 

15, 2008]. 

3. The term “Administrator” as it appears in 40 CFR 52.21 shall mean the Mississippi 

Environmental Quality Permit Board, except that: 

3.1 In subparagraph (b)(3)(iii) [relating to “net emissions increase”], it shall mean either 

the Mississippi Environmental Quality Permit Board or the Administrator of the 

United States Environmental Protection Agency (USEPA). 

3.2 In the following subsections, it shall continue to mean the Administrator of the 

USEPA: 

a. (b)(17) [definition of “federally enforceable”]; 

b. paragraph b(37)(i); 

c. paragraph b(43); 

d. paragraph b(48)(ii)(c); 

e. paragraph b(50)(i); 

f. paragraph b(51); 

g. (g)(1)-(g)(6) [Redesignation]; 

h. (l)(2) [Air quality models]; 

i. (p)(2) [concerning Federal Land Manager]; 

j. (t) [Disputed permits or redesignations]. 

4. Subsections 40 CFR 51.166(f) Exclusions from Increment Consumption (excluding the 

phrase “The plan may provide that”) and 40 CFR 51.166(q) “Public Participation” 

(excluding the phrase “The plan shall provide that.”) are incorporated herein and adopted by 

reference, except for the changes set forth below: 

4.1 The phrases “the plan provides that” and “it shall also provide that” are excluded 

from paragraph 40 CFR 51.166(f)(2), 

4.2 The term “Administrator” as it appears in subparagraphs (f)(l)(v),(f)(4),and(q)(2)(iv) 

shall continue to mean the Administrator of the USEPA, 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

18

4.3 The phrase “specified time period” in subparagraph (q)(1) shall mean thirty (30) 

days, 

4.4 The phrase “reviewing authority” shall mean Mississippi Department of 

Environmental Quality, and 

4.5 The words “one year” in subparagraph (q)(2) shall be replaced by the words “one 

hundred and fifty (150) days.” 

5. The Executive Director of the Mississippi Department of Environmental Quality shall 

transmit to the Administrator of the USEPA a copy of each permit application filed under 

this regulation and shall notify the Administrator of the USEPA of each significant action 

the Executive Director takes on the application. 

6. This regulation applies to any stationary source or modification to which 40 CFR 52.21 

applied as of the date of adoption of this regulation, but for which the Mississippi 

Environmental Quality Permit Board had not issued a permit pursuant to 40 CFR 52.21 

by that date. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

19

MISSISSIPPI DEPARTMENT OF ENVIRONMENTAL QUALITY 

OFFICE OF POLLUTION CONTROL 

STATE IMPLEMENTATION PLAN REVISION 

APPENDIX C-23 

TECHNICAL DEMONSTRATION OF 

NOX INSIGNIFICANCE 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

20

Insignificance of Nitrogen Oxides emissions to PM2.5 PSD analysis 

In the Implementation of the New Source Review (NSR) Program for Particulate Matter Less than 

2.5 Micrometers (PM2.5) published in the Federal Register on May 16, 2008, nitrogen oxides are 

presumed to be precursors to PM2.5 unless the State demonstrates to the Administrator’s satisfaction 

or EPA demonstrates that emissions of nitrogen oxides for sources in a specific area are not a 

significant contributor to that area’s ambient PM2.5 concentrations. Mississippi provides the 

information in following to demonstrate that NOx from the major sources in Mississippi is not a 

significant contributor to ambient PM2.5 concentrations and request a determination that NOx is not a 

significant contributor. 

The preamble to this rule recognizes that particulate nitrates, the species that NOx would contribute, 

varies across the country and would be much less in the southeast. The preambles states “Based on 

a review of speciated monitoring data analyses, it is apparent that nitrate concentrations vary 

significantly across the country. For example, in some southeastern locations, annual average 

nitrate levels are in the range of 6 to 8 percent of total PM2.5mass, whereas nitrate comprises 40 

percent or more of PM2.5 mass in certain California locations. Nitrate formation is favored by the 

availability of ammonia, low temperatures, and high relative humidity. It is also dependent upon the 

relative degree of nearby SO2 emissions because ammonia reacts preferentially with SO2 over 

NOx.” Mississippi submits conditions in the state are such that the formation of particulate nitrates 

is impaired and makes NOx insignificant in its contribution to PM2.5. Mississippi is among the most 

southern states in the nation with wintertime temperatures moderated by the Gulf of Mexico. The 

ambient concentrations of PM2.5 are typically lower in the winter when nitrates can be a greater 

component of PM2.5. Particulate species analysis, regional modeling studies and emission inventory 

data will be presented for this demonstration. 

Particulate Species Analysis 

Quarterly average speciated mass values from Jackson and Gulfport Speciated Trend Network 

monitors are illustrated in Figures 1-4. PM2.5 measurements are separated into several components: 

ammonium (NH4), nitrate (NO3), sulfate (SO4), organic carbon (OC), elemental carbon (EC), crustal, 

and other materials. The Jackson site was located in an inland urban area and the Gulfport site was 

located in a coastal urban area. At Jackson in 2005 and Gulfport in 2004, the total contribution of 

NO3 was 4% to the total annual average PM2.5. This was among the lowest components and lower 

than those cited in the preamble. In the winter, quarter 1, when nitrates make up a slightly greater 

contribution, the total PM2.5 mass is lower than the other quarters. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

21

Annual Mass Jackson 2005

Crustal

5%

EC

3%

OC

27%

SO4

32%

NO3

4%

NH4

8%

Other

21%

Crustal

EC

OC

SO4

NO3

NH4

Other

Figure 1 

Jackson Quarterly and Annual Average 2005 PM2.5 

DV

0

5

10

15

20

25

1 2 3 4 Annual

Quarter

PM2.5 Mass - ug/m3

Other

NH4

NO3

SO4

OC

EC

Crustal

Figure 2 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

22

Annual Mass Gulfport 2004

Crustal

4%

EC

5%

OC

31%

SO4

22%

NO3

4%

NH4

8%

Other

26%

Crustal

EC

OC

SO4

NO3

NH4

Other

Figure 3 

Gulfport Quarterly and Annual Average 2004 PM2.5 

DV

0

2

4

6

8

10

12

14

16

18

20

1 2 3 4 Annual

Quarter

PM2.5 Mass - ug/m3

Other

NH4

NO3

SO4

OC

EC

Crustal

Figure 4 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

23

Modeling Analysis 

Mississippi does not have any PM2.5non attainment areas and as such sensitivity and control strategy 

modeling has not been performed for any Mississippi sites. However, such modeling has been 

performed for neighboring states that demonstrates the impact of reducing NOx on PM2.5. As part of 

the Regional Haze analysis performed by the southeastern Regional Planning Organization 

(VISTAS), Georgia Tech performed emission sensitivities to examine the impact of emission 

reductions on PM2.5 concentration using CMAQv4.4_SOAmods on the VISTAS 12 km modeling 

domain. 

Figures 5-7 show the impact of 30% reductions for various pollutants, including NOx in the summer, 

winter and on an annual basis to the 2009 projected inventory for the Birmingham, Alabama area. 

Alabama is a neighboring state with similar meteorology to Mississippi. The sensitivities show that 

of the pollutants, NOx reductions have an impact of less than 0.2 microgams per cubic meter which 

is the least of any of the other pollutants. 

Figure 5 Sensitivity Analysis for 30% reduction of pollutants for Birmingham, AL (Summer) 

Birmingham, AL (010730023) Summer

-1.60

-1.40

-1.20

-1.00

-0.80

-0.60

-0.40

-0.20

0.00

0.20

SO2_EGU

SO2_nonEGU

NOx_Ground

NOx_Point

NH3

VOCs

PC_Ground

PC_Point

PC_Fires

ΔPM2.5 (

μg/m

3

)

Bio.

Antro.

BCs

MRPO

M-VU

CEN

VISTAS

WV

VA

TN

SC

NC

MS

KY

GA

FL

AL
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

24

Figure 6 Sensitivity Analysis for 30% reduction of pollutants for Birmingham, AL (Winter) 

Figure 7 Sensitivity Analysis for 30% reduction of pollutants for Birmingham, AL (Annual) 

Birmingham, AL (010730023) Annual

-1.00

-0.80

-0.60

-0.40

-0.20

0.00

0.20

SO2_EGU

SO2_nonEGU

NOx_Ground

NOx_Point

NH3

VOCs

PC_Ground

PC_Point

PC_Fires

ΔPM2.5 (

μg/m

3

)

Bio.

Antro.

BCs

MRPO

M-VU

CEN

VISTAS

WV

VA

TN

SC

NC

MS

KY

GA

FL

AL

Birmingham, AL (010730023) Winter

-1.60

-1.40

-1.20

-1.00

-0.80

-0.60

-0.40

-0.20

0.00

0.20

SO2_EGU

SO2_nonEGU

NOx_Ground

NOx_Point

NH3

VOCs

PC_Ground

PC_Point

PC_Fires

ΔPM2.5 (

μg/m3

)

Bio.

Antro.

BCs

MRPO

M-VU

CEN

VISTAS

WV

VA

TN

SC

NC

MS

KY

GA

FL

AL
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

25

Similar sensitivity analysis was performed for the Breton National Wildlife Refuge which is located 

near the Mississippi Gulf Coast. The analysis shows a near negligible reduction in PM2.5 as a result 

of NOx reductions during the summer and a disbenefit from NOx reduction in the wintertime. 

-6.00

-5.00

-4.00

-3.00

-2.00

-1.00

0.00

1.00

SO2_EGU

SO2_nonEGU

NOx_Ground

NOx_Point

NH3

VOCs

PC_Ground

PC_Point

PC_Fires

Δ

Bext (Mm -1)

Bio.

Antro.

BCs

MRPO

M-VU

CEN

VISTAS

WV

VA

TN

SC

NC

MS

KY

GA

FL

AL

Breton, LA (Nov-Dec)

30% reductions from 2009 emissions

Figure 8 Sensitivity Analysis for 30% reduction of pollutants for Breton (Winter) 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

26

Breton, LA (Jun-Jul)

30% reductions from 2009 emissions

-4.00

-3.50

-3.00

-2.50

-2.00

-1.50

-1.00

-0.50

0.00

0.50

SO2_EGU

SO2_nonEGU

NOx_Ground

NOx_Point

NH3

VOCs

PC_Ground

PC_Point

PC_Fires

Δ

Bext Mm ( -1)

Bio.

Antro.

BCs

MRPO

M-VU

CEN

VISTAS

WV

VA

TN

SC

NC

MS

KY

GA

FL

AL

Figure 9 Sensitivity Analysis for 30% reduction of pollutants for Birmingham, AL (Winter) 

Emission Inventories

Table 1 shows the emissions of Nitrogen Oxides, Sulfur Dioxide, and fine particulate matter from 

point, area and mobile sources for the 2005 Calendar Year. The 2005 emission inventory best 

coincides with the available speciation data. The inventory shows that the majority of NOx 

emissions are from mobile sources with point sources making up less than 40% of the emissions. 

Also note that NOx emissions are greater than SO2 or PM2.5. The relative quantity and availability of 

NOx emissions compared to the very small amount of nitrates in the PM2.5 speciation gives further 

indication that NOx emitted in Mississippi is not prone to nitrate formation. Addressing the NOx 

emissions from point sources in PSD PM2.5analysis would impact a small quantity of emissions 

compared to the whole and not have a significant impact on PM2.5ambient concentrations. 
APC-S-5, PSD PM2.5 Final SIP Revision 

May 13, 2011 

27

2005 PM 2.5Contribution Emissions Summary 

Point Area Mobile Total 

Pollutant Tons % Tons % Tons % Tons 

Nox 96,850 38% 13,082 5% 147,214 57% 257,145 

SO2 103,927 91% 4,241 4% 5,973 5% 114,141 

PM 2.5 15,248 14% 87,987 82% 4,017 4% 107,252 

Table 1 

Summary

The State of Mississippi has demonstrated that NOx emissions are an insignificant precursor for total 

annual PM2.5 using evidence from monitoring, modeling, and inventory data. At coastal urban and 

inland urban sites in 2004 and 2005, the total contribution of NO3 was 4% to the total annual 

average PM2.5. The modeling data from neighboring areas show that of the pollutants, NOx 

reductions have an impact of less than 0.2 micrograms per cubic meter which is the least of any of 

the other pollutants. The emission inventory data demonstrates that the relative quantity and 

availability of NOx emissions compared to the very small amount of nitrates in the PM2.5 speciation 

gives further indication that NOx emitted in Mississippi is not prone to nitrate formation. 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

MISSISSIPPI 

DEPARTMENT OF ENVIRONMENTAL QUALITY 

OFFICE OF POLLUTION CONTROL 

TECHNICAL SUPPORT 

DOCUMENT 

ATTENDANT TO THE 

SIP REVISION 

REGARDING REQUIREMENTS OF THE FEDERAL NATIONAL AIR QUALITY 

STANDARD FOR FINE PARTICULATE MATTER (PM2.5) AS IT PERTAINS TO 

PREVENTION OF SIGNIFICANT DETERIORATION OF AIR QUALITY 

INCLUDING AMENDMENTS TO 

“REGULATIONS FOR THE PREVENTION OF SIGNIFICANT DETERIORATION OF 

AIR QUALITY”, APC-S-5 

ADOPTED APRIL 28, 2011 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

2

TABLE OF CONTENTS

Discussion.............................................................................................................Page 4 

Purpose of the Revision. .......................................................................................Page 4 

Sources Affected by the Revision.........................................................................Page 4 

Pollutants Involved. ..............................................................................................Page 4 

Changes in Allowable Emissions. ........................................................................Page 5 

Location/Attainment Status. .................................................................................Page 5 

Part D SIP/Attainment Demonstration Impact. ....................................................Page 5 

Air Quality Impacts. .............................................................................................Page 5 

Modeling...............................................................................................................Page 5 

Compliance Methods to be Employed..................................................................Page 5 

Public Hearing. .....................................................................................................Page 5 

Response to Comments on Proposed SIP Revision..............................................Page 6 

Regulation Changes. .............................................................................................Page 6 

Final Adoption of SIP Revision and Amendments to APC-S-5...........................Page 6 

Administrative Procedures Requirements. ...........................................................Page 6 

ATTACHMENTS

Technical Demonstration of NOx Insignificance ......................................Attachment 1 

Proposed Regulations in EPA Format (Redline/Strikeout). ......................Attachment 2 

 Amendments to APC-S-5 

Proofs of Publication. ................................................................................Attachment 3 

 Notice of Public Hearing 

 Proofs of Publication 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

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3

Comment Letter(s).....................................................................................Attachment 4 

 EPA Comment Letter, April 21, 2011 

Final Adoption Evidence. ..........................................................................Attachment 5 

 Commission Order 

 Secretary of State Filing Form 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

4

DISCUSSION:

The proposed regulation amendments involve amendments to “Regulations for the Prevention of 

Significant Deterioration of Air Quality”, APC-S-5 to adopt, by reference, updated relevant portions 

of federal regulations as promulgated in 40 CFR Parts 51.166 and 52.21 in order to make the state 

Prevention of Significant Deterioration of Air Quality permitting program consistent with the federal 

requirements. Specifically, the amendments incorporate federal provisions relating to implementing 

the New Source Review (NSR) program for fine particulate matter that was promulgated by EPA on 

May 16, 2008, and the PM2.5 Increments, Significant Impact Levels (SILs) and Significant 

Monitoring Concentration (SMC) promulgated on October 20, 2010. 

EPA’s 2008 NSR PM2.5 Implementation Rule (73 FR 28321) identifies nitrogen oxides (NOx) as a 

presumed precursor to PM2.5 in all attainment and unclassifiable areas, unless the State demonstrates 

to the Administrator's satisfaction or EPA demonstrates that emissions of NOx from sources in a 

specific area are not a significant contributor to that area's ambient PM2.5 concentrations. Appendix 

23 of the SIP revision contains a technical demonstration which shows that NOx from sources in the 

state do not significantly contribute to PM2.5 ambient air concentrations in Mississippi. The 

demonstration is also included in Attachment 1 of the Technical Support Document. Mississippi is 

submitting this technical demonstration to U.S. EPA for approval as part of the PM2.5 5 NSR 

Implementation SIP package. Mississippi is adopting the PM2.5 provisions into APC-S-5 by 

reference. Depending upon the final action from US EPA, we will address NOx as a PM2.5 precursor 

as follows: 

1. Until such a time where EPA takes action on the demonstration or upon plan 

disapproval, NOx will be considered as a precursor for PM2.5 in Mississippi. 

2. Upon EPA approval of this demonstration, NOx will not be considered as a precursor 

for PM PM2.5 in Mississippi. 

PURPOSE OF THE REVISION:

The purpose of the SIP revision is to incorporate by reference the requirements of the 

Federal National Ambient Air Quality Standard (NAAQS) for Fine Particulate Matter 

(PM2.5) as it pertains to the Prevention of Significant Deterioration of Air Quality (PSD). 

SOURCES AFFECTED BY THE REVISION:

This SIP revision potentially affects all sources and practices subject to air pollution control 

regulations in Mississippi. 

POLLUTANTS INVOLVED:

The pollutants affected by this SIP Revision are all pollutants subject to regulation. 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

5

CHANGES IN ALLOWABLE EMISSIONS:

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

LOCATION/ATTAINMENT STATUS:

All areas of the state are designated attainment for all NAAQS. The proposed SIP Revision 

does not change any requirements for sources locating in or impacting non-attainment areas. 

PART D SIP/ATTAINMENT DEMONSTRATION IMPACT:

This is not applicable. 

AIR QUALITY IMPACTS:

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

MODELING:

No modeling is necessary for this SIP Revision. 

COMPLIANCE METHODS TO BE EMPLOYED:

Compliance with the amended regulations will be achieved by air emission permits. 

PUBLIC HEARING:

Public participation on the SIP Revision was achieved by a public hearing held on April 21, 

2011, at 2:30 p.m. in the Commission Hearing Room (Room 104A) of the Mississippi 

Department of Environmental Quality Office Building located at 515 E. Amite Street, 

Jackson, Mississippi 39201 in accordance with the information provided in the public notice 

and Mississippi Administrative Procedures Act. The notice for public hearing was published 

consistent with procedures approved by EPA. 

The notice of public hearing was published on March 22, March 29, and April 5, 2011, in 

daily newspapers in the cities of Gulfport, Jackson, and Tupelo in the State of Mississippi. 

The notice of public hearing, the proposed SIP revision, and proposed amendments to state 

air pollution control regulations was made available for public review in the main branches 

of the public libraries in the above mentioned cities and at the Mississippi Department of 

Environmental Quality, 515 E. Amite St., Jackson, Mississippi, 39201 and also was available 

on the Department’s website http://www.deq.state.ms.us. The public notice was also mailed 

to persons on the air pollution control regulation mailing list. 

TSD Attachment 3 contains a copy of the notice of public hearing and copies of proofs of 

publication of the notice of public hearing. 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

6

RESPONSE TO COMMENTS ON PROPOSED PLAN REVISION:

There were no comments received at the public hearing held April 21, 2011. The US 

Environmental Agency submitted comments regarded the SIP provision. One comment 

requested that that Mississippi consider removing the grandfathering provisions for PM2.5 

from our adoption by reference, since EPA will very shortly repeal this provision. The 

Commission did include a provision in the approved regulation which excludes the 

grandfathering provision for PM2.5. EPA also commented that the technical demonstration 

for NOx insignificance as a precursor for PM2.5 was still under review and has not been 

approved. Since the technical demonstration has not been approved, NOx is considered a 

precursor for PM2.5 at this time. No other comments were received. TSD Attachment 4 

contains a copy of EPA’s comment letter. 

REGULATION CHANGES:

See TSD Attachment 2. 

FINAL ADOPTION OF PLAN REVISION AND REGULATIONS:

TSD Attachment 5 contains evidence of final adoption of the SIP revision and amendments 

to APC-S-5. 

ADMINISTRATIVE PROCEDURES REQUIREMENTS:

The SIP Revision and amendments to regulations was completed in accordance with 

Mississippi's Administrative Procedures Law and the Mississippi Air and Water Pollution 

Control Law 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

7

ATTACHMENT 1 

TECHNICAL DEMONSTRATION OF 

NOX INSIGNIFICANCE 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

8

Insignificance of Nitrogen Oxides emissions to PM2.5 PSD analysis 

In the Implementation of the New Source Review (NSR) Program for Particulate Matter Less than 

2.5 Micrometers (PM2.5) published in the Federal Register on May 16, 2008, nitrogen oxides are 

presumed to be precursors to PM2.5 unless the State demonstrates to the Administrator’s satisfaction 

or EPA demonstrates that emissions of nitrogen oxides for sources in a specific area are not a 

significant contributor to that area’s ambient PM2.5 concentrations. Mississippi provides the 

information in following to demonstrate that NOx from the major sources in Mississippi is not a 

significant contributor to ambient PM2.5 concentrations and request a determination that NOx is not a 

significant contributor. 

The preamble to this rule recognizes that particulate nitrates, the species that NOx would contribute, 

varies across the country and would be much less in the southeast. The preambles states “Based on 

a review of speciated monitoring data analyses, it is apparent that nitrate concentrations vary 

significantly across the country. For example, in some southeastern locations, annual average 

nitrate levels are in the range of 6 to 8 percent of total PM2.5mass, whereas nitrate comprises 40 

percent or more of PM2.5 mass in certain California locations. Nitrate formation is favored by the 

availability of ammonia, low temperatures, and high relative humidity. It is also dependent upon the 

relative degree of nearby SO2 emissions because ammonia reacts preferentially with SO2 over 

NOx.” Mississippi submits conditions in the state are such that the formation of particulate nitrates 

is impaired and makes NOx insignificant in its contribution to PM2.5. Mississippi is among the most 

southern states in the nation with wintertime temperatures moderated by the Gulf of Mexico. The 

ambient concentrations of PM2.5 are typically lower in the winter when nitrates can be a greater 

component of PM2.5. Particulate species analysis, regional modeling studies and emission inventory 

data will be presented for this demonstration. 

Particulate Species Analysis 

Quarterly average speciated mass values from Jackson and Gulfport Speciated Trend Network 

monitors are illustrated in Figures 1-4. PM2.5 measurements are separated into several components: 

ammonium (NH4), nitrate (NO3), sulfate (SO4), organic carbon (OC), elemental carbon (EC), crustal, 

and other materials. The Jackson site was located in an inland urban area and the Gulfport site was 

located in a coastal urban area. At Jackson in 2005 and Gulfport in 2004, the total contribution of 

NO3 was 4% to the total annual average PM2.5. This was among the lowest components and lower 

than those cited in the preamble. In the winter, quarter 1, when nitrates make up a slightly greater 

contribution, the total PM2.5 mass is lower than the other quarters. 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

9

Annual Mass Jackson 2005

Crustal

5%

EC

3%

OC

27%

SO4

32%

NO3

4%

NH4

8%

Other

21%

Crustal

EC

OC

SO4

NO3

NH4

Other

Figure 1 

Jackson Quarterly and Annual Average 2005 PM2.5 

DV

0

5

10

15

20

25

1 2 3 4 Annual

Quarter

PM2.5 Mass - ug/m3

Other

NH4

NO3

SO4

OC

EC

Crustal

Figure 2 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

10

Annual Mass Gulfport 2004

Crustal

4%

EC

5%

OC

31%

SO4

22%

NO3

4%

NH4

8%

Other

26%

Crustal

EC

OC

SO4

NO3

NH4

Other

Figure 3 

Gulfport Quarterly and Annual Average 2004 PM2.5 

DV

0

2

4

6

8

10

12

14

16

18

20

1 2 3 4 Annual

Quarter

PM2.5 Mass - ug/m3

Other

NH4

NO3

SO4

OC

EC

Crustal

Figure 4 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

11

Modeling Analysis 

Mississippi does not have any PM2.5non attainment areas and as such sensitivity and control strategy 

modeling has not been performed for any Mississippi sites. However, such modeling has been 

performed for neighboring states that demonstrates the impact of reducing NOx on PM2.5. As part of 

the Regional Haze analysis performed by the southeastern Regional Planning Organization 

(VISTAS), Georgia Tech performed emission sensitivities to examine the impact of emission 

reductions on PM2.5 concentration using CMAQv4.4_SOAmods on the VISTAS 12 km modeling 

domain. 

Figures 5-7 show the impact of 30% reductions for various pollutants, including NOx in the summer, 

winter and on an annual basis to the 2009 projected inventory for the Birmingham, Alabama area. 

Alabama is a neighboring state with similar meteorology to Mississippi. The sensitivities show that 

of the pollutants, NOx reductions have an impact of less than 0.2 microgams per cubic meter which 

is the least of any of the other pollutants. 

Figure 5 Sensitivity Analysis for 30% reduction of pollutants for Birmingham, AL (Summer) 

Birmingham, AL (010730023) Summer

-1.60

-1.40

-1.20

-1.00

-0.80

-0.60

-0.40

-0.20

0.00

0.20

SO2_EGU

SO2_nonEGU

NOx_Ground

NOx_Point

NH3

VOCs

PC_Ground

PC_Point

PC_Fires

ΔPM2.5 (

μg/m

3

)

Bio.

Antro.

BCs

MRPO

M-VU

CEN

VISTAS

WV

VA

TN

SC

NC

MS

KY

GA

FL

AL
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

12

Figure 6 Sensitivity Analysis for 30% reduction of pollutants for Birmingham, AL (Winter) 

Figure 7 Sensitivity Analysis for 30% reduction of pollutants for Birmingham, AL (Annual) 

Birmingham, AL (010730023) Annual

-1.00

-0.80

-0.60

-0.40

-0.20

0.00

0.20

SO2_EGU

SO2_nonEGU

NOx_Ground

NOx_Point

NH3

VOCs

PC_Ground

PC_Point

PC_Fires

ΔPM2.5 (

μg/m

3

)

Bio.

Antro.

BCs

MRPO

M-VU

CEN

VISTAS

WV

VA

TN

SC

NC

MS

KY

GA

FL

AL

Birmingham, AL (010730023) Winter

-1.60

-1.40

-1.20

-1.00

-0.80

-0.60

-0.40

-0.20

0.00

0.20

SO2_EGU

SO2_nonEGU

NOx_Ground

NOx_Point

NH3

VOCs

PC_Ground

PC_Point

PC_Fires

ΔPM2.5 (

μg/m3

)

Bio.

Antro.

BCs

MRPO

M-VU

CEN

VISTAS

WV

VA

TN

SC

NC

MS

KY

GA

FL

AL
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

13

Similar sensitivity analysis was performed for the Breton National Wildlife Refuge which is located 

near the Mississippi Gulf Coast. The analysis shows a near negligible reduction in PM2.5 as a result 

of NOx reductions during the summer and a disbenefit from NOx reduction in the wintertime. 

-6.00

-5.00

-4.00

-3.00

-2.00

-1.00

0.00

1.00

SO2_EGU

SO2_nonEGU

NOx_Ground

NOx_Point

NH3

VOCs

PC_Ground

PC_Point

PC_Fires

Δ

Bext (Mm -1)

Bio.

Antro.

BCs

MRPO

M-VU

CEN

VISTAS

WV

VA

TN

SC

NC

MS

KY

GA

FL

AL

Breton, LA (Nov-Dec)

30% reductions from 2009 emissions

Figure 8 Sensitivity Analysis for 30% reduction of pollutants for Breton (Winter) 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

14

Breton, LA (Jun-Jul)

30% reductions from 2009 emissions

-4.00

-3.50

-3.00

-2.50

-2.00

-1.50

-1.00

-0.50

0.00

0.50

SO2_EGU

SO2_nonEGU

NOx_Ground

NOx_Point

NH3

VOCs

PC_Ground

PC_Point

PC_Fires

Δ

Bext Mm ( -1)

Bio.

Antro.

BCs

MRPO

M-VU

CEN

VISTAS

WV

VA

TN

SC

NC

MS

KY

GA

FL

AL

Figure 9 Sensitivity Analysis for 30% reduction of pollutants for Birmingham, AL (Winter) 

Emission Inventories

Table 1 shows the emissions of Nitrogen Oxides, Sulfur Dioxide, and fine particulate matter from 

point, area and mobile sources for the 2005 Calendar Year. The 2005 emission inventory best 

coincides with the available speciation data. The inventory shows that the majority of NOx 

emissions are from mobile sources with point sources making up less than 40% of the emissions. 

Also note that NOx emissions are greater than SO2 or PM2.5. The relative quantity and availability of 

NOx emissions compared to the very small amount of nitrates in the PM2.5 speciation gives further 

indication that NOx emitted in Mississippi is not prone to nitrate formation. Addressing the NOx 

emissions from point sources in PSD PM2.5analysis would impact a small quantity of emissions 

compared to the whole and not have a significant impact on PM2.5ambient concentrations. 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

15

2005 PM 2.5Contribution Emissions Summary 

Point Area Mobile Total 

Pollutant Tons % Tons % Tons % Tons 

Nox 96,850 38% 13,082 5% 147,214 57% 257,145 

SO2 103,927 91% 4,241 4% 5,973 5% 114,141 

PM 2.5 15,248 14% 87,987 82% 4,017 4% 107,252 

Table 1 

Summary

The State of Mississippi has demonstrated that NOx emissions are an insignificant precursor for total 

annual PM2.5 using evidence from monitoring, modeling, and inventory data. At coastal urban and 

inland urban sites in 2004 and 2005, the total contribution of NO3 was 4% to the total annual 

average PM2.5. The modeling data from neighboring areas show that of the pollutants, NOx 

reductions have an impact of less than 0.2 micrograms per cubic meter which is the least of any of 

the other pollutants. The emission inventory data demonstrates that the relative quantity and 

availability of NOx emissions compared to the very small amount of nitrates in the PM2.5 speciation 

gives further indication that NOx emitted in Mississippi is not prone to nitrate formation. 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

16

ATTACHMENT 2 

AMENDMENTS TO 

“REGULATIONS FOR THE PREVENTION OF SIGNIFICANT 

DETERIORATION OF AIR QUALITY” 

APC-S-5 

AMENDED APRIL 28, 2011
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

17

MISSISSIPPI COMMISSION ON ENVIRONMENTAL QUALITY

“REGULATIONS FOR THE PREVENTION OF SIGNIFICANT DETERIORATION OF AIR 

QUALITY” 

APC-S-5 

Amended April 28, 2011
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

18

MISSISSIPPI COMMISSION ON ENVIRONMENTAL QUALITY 

REGULATIONS FOR THE PREVENTION OF SIGNIFICANT DETERIORATION 

OF AIR QUALITY 

APC-S-5 

Adopted June 28, 1990 

Amended April 25, 1991 

Amended December 9, 1993 

Amended August 22, 1996 

Amended July 28, 2005 

Amended August 23, 2007 

Amended October 28, 2010 

Amended April 28, 2011

1. The purpose of this regulation is to implement a program for the prevention of significant 

deterioration of air quality as required by 40 CFR 51.166. This regulation supercedes and 

replaces the previous adoption by reference of 40 CFR 52.21 and 40 CFR 51.166. 

40 CFR 52.21 and 51.166 as used in this regulation refer to the federal regulations as 

amended and promulgated by September 13, 2010March 22, 2011, except as provided in 2. 

below. CFR refers to the “Code of Federal Regulations”. 

2. Other than the subsections and phrases listed below and except for the changes set forth in 

Section 3. of this regulation, the provisions of 40 CFR 52.21 as amended and promulgated by 

September 13, 2010March 22, 2011, are incorporated herein and adopted by reference by the 

Mississippi Commission on Environmental Quality as official regulations of the State of 

Mississippi and shall hereafter be enforceable as such. The following subsection and phrases 

of 40 CFR 52.21 are excluded from this regulation: 

2.1 (a) [Plan disapproval], 

2.2 (q) [Public Participation], 

2.3 (s) [Environmental Impact Statement], 

2.4 (u) [Delegation of authority], 

2.5 (cc) [Routine maintenance, repair, and replacement], and 

2.6 The phrase “in circumstances where there is a reasonable possibility, within the 

meaning of paragraph (r)(6)(vi) of 40 CFR 52.21, that a project that is not a part of a 

major modification may result in a significant emissions increase” in paragraph (r)(6) 

of (r) [Source obligation]. 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

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19

2.7 Certain amendments to 40 CFR 52.21 specified in 73 FR 28321-28350. The 

excluded provisions are as follows:

a. Revised paragraphs (b)(23)(i) and (b)(50)(i). In lieu of these paragraphs 

(b)(23)(i) and (b)(50)(i) of 40 CFR 52.21, as amended and promulgated by 

June 15, 2007, are incorporated and adopted by reference.

b. Addition of paragraphs (b)(50)(vi) and (i)(1)(xi)(i)(1)(xi) [Exemptions; 

PM2.5 in complete PSD applications received prior to July 15, 2008]. 

3. The term “Administrator” as it appears in 40 CFR 52.21 shall mean the Mississippi 

Environmental Quality Permit Board, except that: 

3.1 In subparagraph (b)(3)(iii) [relating to “net emissions increase”], it shall mean either 

the Mississippi Environmental Quality Permit Board or the Administrator of the 

United States Environmental Protection Agency (USEPA). 

3.2 In the following subsections, it shall continue to mean the Administrator of the 

USEPA: 

a. (b)(17) [definition of “federally enforceable”]; 

b. paragraph b(37)(i); 

c. paragraph b(43); 

d. paragraph b(48)(ii)(c); 

e. paragraph b(50)(i); 

f. paragraph b(51); 

g. (g)(1)-(g)(6) [Redesignation]; 

h. (l)(2) [Air quality models]; 

i. (p)(2) [concerning Federal Land Manager]; 

j. (t) [Disputed permits or redesignations]. 

4. Subsections 40 CFR 51.166(f) Exclusions from Increment Consumption (excluding the 

phrase “The plan may provide that”) and 40 CFR 51.166(q) “Public Participation” 

(excluding the phrase “The plan shall provide that.”) are incorporated herein and adopted by 

reference, except for the changes set forth below: 

4.1 The phrases “the plan provides that” and “it shall also provide that” are excluded 

from paragraph 40 CFR 51.166(f)(2), 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

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20

4.2 The term “Administrator” as it appears in subparagraphs (f)(l)(v),(f)(4),and(q)(2)(iv) 

shall continue to mean the Administrator of the USEPA, 

4.3 The phrase “specified time period” in subparagraph (q)(1) shall mean thirty (30) 

days, 

4.4 The phrase “reviewing authority” shall mean Mississippi Department of 

Environmental Quality, and 

4.5 The words “one year” in subparagraph (q)(2) shall be replaced by the words “one 

hundred and fifty (150) days.” 

5. The Executive Director of the Mississippi Department of Environmental Quality shall 

transmit to the Administrator of the USEPA a copy of each permit application filed under 

this regulation and shall notify the Administrator of the USEPA of each significant action 

the Executive Director takes on the application. 

6. This regulation applies to any stationary source or modification to which 40 CFR 52.21 

applied as of the date of adoption of this regulation, but for which the Mississippi 

Environmental Quality Permit Board had not issued a permit pursuant to 40 CFR 52.21 

by that date. 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

21

ATTACHMENT 3 

NOTICE OF PUBLIC HEARING 

PROOFS OF PUBLICATION
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

22

MISSISSIPPI COMMISSION ON ENVIRONMENTAL QUALITY 

NOTICE OF PROPOSED RULEMAKING 

NOTICE OF PUBLIC HEARING 

PUBLIC NOTICE START DATE: MARCH 22, 2011 

PLEASE TAKE NOTE that the Mississippi Commission on Environmental Quality (“Commission”) 

is considering a Revision to the State Implementation Plan for Air Pollution Control (SIP Revision) 

and amendments to state air pollution control regulations. The proposed SIP Revision and 

regulation amendments will be applicable statewide. 

I.The proposed SIP Revision and amendments to state air pollution control regulations involve 

amendments to “Regulations for the Prevention of Significant Deterioration of Air Quality”, 

APC-S-5 to adopt, by reference, updated relevant portions of federal regulations as 

promulgated in 40 CFR Parts 51.166, 52.21, and 52.22 to make the state Prevention of 

Significant Deterioration of Air Quality permitting program consistent with the federal 

requirements. Specifically, the proposed amendments will incorporate federal provisions 

relating to implementing the New Source Review (NSR) program for fine particulate matter 

(PM2.5) that was promulgated by EPA on May 16, 2008 and the PM2.5 Increments, 

Significant Impact Levels (SILs) and Significant Monitoring Concentration (SMC) 

promulgated on October 20, 2010. 

EPA’s 2008 NSR PM2.5 Implementation Rule (73 FR 28321) identifies nitrogen oxides (NOx) as a 

presumed precursor to PM2.5 in all attainment and unclassifiable areas, unless the State 

demonstrates to the Administrator's satisfaction or EPA demonstrates that emissions of NOx 

from sources in a specific area are not a significant contributor to that area's ambient PM2.5 

concentrations. The draft SIP revision contains a technical demonstration which shows that 

NOx from sources in the state do not significantly contribute to PM2.5 ambient air 

concentrations in Mississippi. Mississippi proposes to submit this technical demonstration to 

U.S. EPA for approval as part of the PM2.5NSR Implementation SIP package. Mississippi 

is proposing to adopt the PM2.5 provisions into APC-S-5 by reference. Depending upon the 

final action from US EPA, we are proposing to address NOx as a PM2.5 precursor as 

follows: 

1. Until such a time where EPA takes action on the demonstration or upon plan 

disapproval, NOx will be considered as a precursor for PM2.5 in Mississippi. 

2. Upon EPA approval of this demonstration, NOx will not be considered as a precursor 

for PM2.5 in Mississippi. 

Mississippi is specifically soliciting comments on the appropriateness of including or 

excluding NOx as a PM2.5 precursor for PSD purposes. 

II. Manner By Which the Public May Comment. 

Copies of the proposed amendments to the referenced regulations may be obtained by calling 

Ms. Maya Rao at 601-961-5242 or Mr. Connie Simmons at 601-961-5165 or writing to 

Mississippi Department of Environmental Quality, Air Division, P.O. Box 2261, Jackson, 

Mississippi 39201. For persons with internet access, a copy of the proposed SIP revision 
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

23

and proposed amendments to the referenced regulations may be found on the Mississippi 

Department of Environmental Quality’s website at http://www.deq.state.ms.us. Also, copies 

of the proposed SIP Revision and proposed amendments to the referenced regulations will be 

available for public review through Thursday, April 21, 2011, in the main branch of public 

libraries in the cities of Gulfport, Jackson, and Tupelo in the State of Mississippi. The 

proposed SIP Revision and amendments to the referenced regulations may also be reviewed 

in the offices of the Mississippi Department of Environmental Quality, 515 E. Amite Street, 

Jackson, Mississippi. Please contact Ms. Edna Banks 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 proposed 

regulation amendments will be made part of the public hearing record if delivered by 5:00 

p.m., Thursday, April 21, 2011, to the attention of Ms. Maya Rao at the address shown 

above. 

III. Notice of Public Hearing. 

A public hearing to receive comments concerning the proposed SIP Revision and regulation 

amendments will be conducted. The hearing will be held on Thursday, April 21, 2011, at 

2:30 p.m. in the Commission Hearing Room (Room 104A) of the Mississippi Department of 

Environmental Quality Office Building located at 515 E. Amite Street, Jackson, Mississippi 

39201. 

IV. Additional Information. 

For additional information, please contact Ms. Maya Rao at 601-961-5242 or Mr. Connie 

Simmons at 601-961-5165. 
PROOF HERE

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‘—“-“-‘0210* “(0*00’

GLORIA WEAKLEY

an authorized clerk of THE CLARION-LEDGER, a

newspaper as defined and prescribed in Sections 13-3-31 and 13-3-32, of the Mississippi Code 0111972. as amended, who, being duly sworn, states that the notice, a true copy of which is hereto attached, appeared in the issues of said

newspaper as follows:

3/22/2011

3/2912011

4/5/2011

Size: 773 words / 2.00 col. x 110.00 linesPublished: 3 time(s)

Total: $26 .,$

e,,

Signed ,),, *\(.‘L’cl’”'e’

Authorized Clerk of

The Clarion-Ledger

SWORN to and subscribed before me on 4/5/2011.

Notary Public

RICK TYLER

Notary Public State of Mississippi at Large. Bonded thru Notary Public Underwriters

(SEAL)

Mi’

,pt?’ 4<

1 rlfl3’*ty I ‘tJI3l

CIII

(.0,11110*0 G*I,lnj ‘ 4UI* 21’, 211(4
Slson to the State Implemen tation Plan for Air Pollution

Control (SIP Retision). andamendments to state air pol

lution control regulations. Theproposed. SIP Revision and re9uItlon amendments will

be applicable statewide. I. The proposed SIP Revision.

and amendments to statepollution control regulations invoke amendments to

‘Regulations for the Preven tion of Sisntilcent Detedo

ration of Air.OusIity. APC-S-5 adb -Nferen

updated relevant portions of federal regulations as

promulgated In 40 CFR Parts.

51.186, 52.21, 52.22 to

make the state Prevehtlon of

SignIficant Deterioratioruof Air

Quality permitting program consistent with the fedpral

requirements. Specifictilly, the proposed amendrirents’ wfl incorporate federal pro visions’ -- relating’ to

implemeptingthe NewSource Review (NSA) proam for fine particulate matter (PM2.5) that Was

promulgated by EPA on May

16, 2008 and the PM2.5

Increments, Significant Im

pact Levels(StLs) and ignifl cbnt Monitoring Concen tration (SMC)promulgated on October 20,2010.

EPAs 2008 NSR PM2.5 Im

plemanlation Rule (73 FR28321) identifies nItrogen oxides (NOx) as a presumed

precursor to PM2.5 in all at tainment and assiflableareas, unless the Slatedemonstrates to the

Administrator’s satisfaction orEPA demonstrates thatemissions of NOx from

sources In a specific area are,nuts significant contributor to that area’s ambient PM2,5

concentrations. The draft SIP

revision contains ateclinical.

demonstration which showsthat NOx from sources in thestate do not Significantly con-. tribute to.PM2.5 ambient air’

conantrationsiRMlsalsslpp: Mississippi propodes to sub mit lhis technical demon

stration t&US. EPA for ap proval as part of the PM2.5 NSR Implementation SIP package. Mississippi is pro posing to adopt the PM2.5 provisions into APC-S-5 by reference. Depending upon the thai action from US EPA,

we am proptisingto address

NOxesaPJA2.Sprecursoras follows:

1. Until auth a time where

EPA takes action on the

demonstration or upon plan disapproval, NOs will be con sidered as a precursor for’ PM2.5 in Mississippi. 2. Upon EPAaxrovalolth’a demonstration, NOx will not

be considered as a precursor for PM2.5 in Mississippi. Mississippi is specifically soliciting comments on the

appfopnatuness of includinor exciuding NOx as a PM2,

precursor (or P50 purposes. II. Manner By Which tire Public May Comment.

Copies of the proposed amendments to the

referenced regulations may be obtained by calling Ms. MeyelRaoatflOl-961-5242or

Mr. Connie Simmons at

601-961-5165 or writing to Mlssissigpi Department of En vironmental Quality. Air Div ision, P.O. Box 61, Jack anippp9201.For

through Thursday, April 

, 2011 in the main branch of public libraries in the cities of Gulfport. Jackson, arid Tu pelo in the State of Mississip pi. The proposed SIP Revis ion and amendments to the referenced regulations may also be reviewed In the offices o(the Mississippi Department of Environmental,Quality4l5 E.AhlitflStreel.Jackson, Mis sissippi. Please contact Ms. Edna Banks at (601) 961-5171 .10 schedule en ap,. holntnlerit” Members of the public may present verbal or written comments at the public hear ing described below, Also, ‘wrrtten statements regarding the proposed SIP Revision and proposed regulation amendments, will be made. part of the public hearing re cordif delivered by &00 p.m., Thursday, AprIl 21, 2011.to the attention of Ms. Mays.Rao attire address shown above. itt. Notice of Public Hearing. A piiuflc hearing to receive comments concerning the proposed SIP RevisIon and regulation amendments Will be conducted. ‘The hearing will be held on Thursday, Aptrl 21, 2011, at230p.m. in the Commission Hearing Room (Room 104A)ofteMiesisslp- pi Department of Environ mental QualityOftics Building Iocatedat5l6EAmlteStreet, Jackson, Mississippi 39201. IV. Additional Information. For additional Information, please contact Ms. Maya Rao at 801-961-5242 or Mr. Con nb SImmons at 601-961-5185. ADV22,29.5,3TUE 1445293

who, being by me first duly sworn, did depose and say that she is

a

clerk of The Sun Herald , a newspaper published in the city

Gulfport , in Harrison County, Mississippi, and the publication

of the notice,

a copy of which is hereto attached, has been made

in said paper .3 times in the following numbers and on the

.Jollowing dates of such paper, viz:

Vol.

Vol. cai

Vol. ia’

Vol.

Vol.

Vol.

Vol.

No., j’1 dated

a day of J-ôJ ,20 II

No., ii1 dated day ofkii , 20(1

No., &4 dated day of___________ ,20 1(

No.,

dated

day of___________ ,20_____

No.,

dated

day of___________ ,20_____

No.,

dated

day of___________ ,20_____

No.,

dated

day of___________ ,20_____

Affiant further states on oath that said newspaper has been

established and published continuously in said country for

a period

of more than twelve months next prior to the first publication of said

notice.

11 h.I(1

Clerk

Sworn to and subscribed before me this

4 day of

Ai- .A.D.,20I

ryPubI
Voj.L) NOTICE OF PROPOSED No3&’’ Date 

h9 20/I 

RULEMAKING

NOTICE OF

PUBLIC HEARING

Vo1./_.No.

5 Date AI

2 20/I PUBLIC NOTICE START DATE: MARCH 22,2021

PLEASE TAKE NOTE that VoL

No. 

Date_________________ the Mississippi Commis sion on rnvlronmental

Quality rCommisidon) is

Vol. consloennQ a Revision to - No,_______ Date

— 20_ the State implementation Plan for Air Pollution Con

trol (SIP Revision) and 

Vol._ No.______ amendments to state air 

pollution control reuia dons. The proposed SIP 

20 Revision and regulation amendments will be appli cable statewide.

Witness my ha,d and seal this day I. The proposed SIP Revi sion and amendments to

state air pollution control

of____________ 20// regulations Involve 

amendments to 9tegula- dons for the Prevention of IN4a

p Significant Deterioration -w-9 of Air Quality APC-S-5 to adopt, by reference, updated relevant portions

My Commission of federal regulations as Promuloated In 40 CFR

Parts 51.166 52.21, and 52.22 to malts the state

Prevention of Significant Deterioration of Air Quality permitting proaram con sistent with te federal

requirements. Spedfical iy, the proposed amend ments will Incorporate fed eral provisions relation to Implementing the flew Source Review (NSR) pro

gram for fine particulate matter (PM2.5) that was romuloated by EPA on 15, 2008 and the

PMLS Increments Sidnifi

cant Impact Level (SII.s) and Significant Monltorinp Concentration (SMC)

Prornukgated on October 20, 20

‘EPA’S 2008 NSR PM2.5

Implementation Rule (73 FR 28321) ldentliies nitro

gen oxides (NOx) as a presumed orecursor to I’M2.5 in all attainment

and unclassifiable areas, unless the State demon

strates to ti-ia Administrator’s satisfaction or EPA

demonstrates that emis

sions of NOx from sources

in a specific area are not a slgnlf.c.ant contributor to that area’s ambient P142.5

concentrations. The draft

SIP revision contains a

technical demonstration

which shows that NOx

from sources In the state do not sIgnificantly con tribute to PM2.5 ambient air concentrations in Mis

sissippi. Mississippi proposes to submit thIs tech nical demonstration toU.S. EPA for approval as part of the PM2.5 NSRimplementation SIP pack

age. Mississippi Is propos ing to adopt the PM25 provisions into APC-S-5 by PRINTERS reference. Depending

upon the final actIon from

To

&

? words at__LL’CCIItS per wo 

US EPA, we are proposino 

to address NOx as a PM2i precursor as follows:

1. Until such a time To Proof of Publication_________________________ where EPA takes action

on the demonstration orupon plan disapproval TotaL.... NOx will be considereti

as a precursor for PM2.5

I Mind.

appropriateness 

Ipg or excluding NOX as a P142.5 precursor for P50

purposes.II. Manner By Which the

Public May Comment.Copies of the proposed amendments to the referbe

of

Environmental Quality

OffIce Bsilldlnq located at

515 E. Amite Street, Jackson, Mississippi 39201.

IV. Additional Information.

For additional Information,

please contact Ms. MayaReD at 601-961-5242 or

Mr. Connie Simmons at 601-961-5165.

March 22, 29. - AprIl 5, 2011.
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

24

ATTACHMENT 4 

COMMENT LETTER(S) 
Mrs. Maya Rao, Director

Air Division

Office of Pollution ControlMississippi Department of Environmental Quality

P.O. Box 2261

Jackson, Mississippi 39225-2261Dear Mrs. Rao:

The Region 4 Office of the Environmental Protection Agency (EPA) received the

Mississippi Department of Environmental Quality, Air Pollution Control’s March 22, 2011,

prehearing State Implementation Plan (SIP) revision proposing changes to Mississippi’s

regulations at APC-S-5 — Regulationsfor the Prevention ofSignificant Deterioration ofAir

Quality. Specifically, the SIP revision incorporates by reference federal Prevention of

Significant Deterioration (PSD) regulations at 40 Code of Federal Regulations (CFR) 52.21 and

5 1.166 as of March 22, 2011, to include the New Source Review Fine Particulate (PM25)

Implementation Rule (75 FR 28321) and the PM25 Increments, Significant Impact Levels andSignificant Monitoring Concentration Rule (75 FR 64864). We have completed our preliminary

review and offer comments below regarding the nitrogen oxide (NOx) insignificancedemonstration and the PM2.5grandfathering for your review and consideration.

EPA Region 4 continues to review the approvability of Mississippi’s PM2.5NOx

insignificance demonstration for PSD purposes and is consulting with the Office of Air Quality

Planning and Standards. We will provide a final determination upon conclusion of our review.

In addition, on February 11, 2010 (75 FR 6827) EPA proposed to repeal the PM2.5

grandfathering provisions and end the utilization of the PM10surrogate policy. The proposalstates that “IfEP..4 adopts a final rule to repeal the grandjtheringprovisions, any PSD permit

applications covered by the grandfatheringprovisions that have not yet been approved andissued afinal and e,fjective PSD permit will not be able to rely on the PM, 0Surrogate Policy to

satisfy the PM2.5requirements. T’(See 75 FR at 6833). We recommend that Mississippi exclude

the PM10 grandfathering provision at 40 CFR 52.2 l(b)(50)(i)(l)(xi), as amended in the PM25

Implementation Rule, from the incorporation by reference of 40 CFR 52.21 at APC-S-5.

Internet Address (URL) . http//www.epa.gov

Recycledlflecyclable • Pñnleci with Vegetable Oil Based Inks on Recycled Paper (MInimum 30% Postconsumer)
Air Plarming Branch
APC-S-5, PSD PM2.5 Final SIP Revision TSD 

May 13, 2011 

25

ATTACHMENT 5 

EVIDENCE OF ADOPTION OF SIP REVISION AND 

AMENDMENTS TO APC-S-5 
Control of Air Pollution

T

ORDER NO. 

‘‘

ORDER

Came before the Mississippi Commission on Environmental Quality (“Commission”) on

April 28, 2011, the recommendation of the Staff of the Mississippi Department of Environmental

Quality (“MDEQ”) that the Commission adopt proposed amendments to Commission Regulation

APC-S-5, entitled “Regulations for the Prevention of Significant Deterioration ofAir Quality”, alongwith concurrent amendments to the APC-S-5 section ofthe Mississippi State Implementation Plan

(“SIP”) for Control of Air Pollution. The Commission finds as follows:

1. The public record file in this matter reflects that public notices were published as

required by state law; that a public notice and comment period of at least thirty days

was allowed; and that Staff conducted a public hearing regarding the proposedregulations, in accordance with Miss. Code Ann. 49-17-25 (Rev. 2003), and as

required in part by the Mississippi Administrative Procedures Law, Miss. Code Ann.

§ 25-43-1.101, etseq. (Rev. 2010).

2. One written comment was received regarding the proposed amendments to the

regulations. The transcript of the public hearing and the written comment wereconsidered by the Commission prior to the adoption ofthese amendments.

1
Code Ann. § 49-17-41 (Rev. 2003), an interested party files a sworn petition with the

Commission within 30 days from the date of this Order requesting an evidentiary

hearing before the Commission or its hearing officer. If an evidentiary hearing is

requested and held, the Commission shall finalize its decision in this matter by

issuing a subsequent Order after full consideration ofthe matters raised during the

evidentiary hearing.

4. Ifno petition for evidentiary hearing is filed, these regulations shall become effective

30 days after filing with the Secretary of State, as provided in Miss. Code Ann. § 25-

43-3.113 (Rev. 2010). If a petition for evidentiary hearing is filed, the final adoption

and effective date, if any, ofthe regulations shall be established by the final Order of

the Commission in this matter, to be issued subsequent to the evidentiary hearing.

SO ORDERED, this the 2 day of , 2011.

FOR: Mississippi Commission on Environmental Quality

BY:

Director

Mississippi Department of Environmental Quality

2