Appendix C - Floyd County PM2.5 Nonattainment Area 

Redesignation Request and Maintenance Plan 

 1 

Emissions Inventory Development for Floyd County

Emissions inventories for Floyd County were developed for attainment year 2007 and future years 

2017 and 2023. Direct PM2.5 emissions and PM2.5 precursor emissions (SO2 and NOx), as defined in the 

Clean Air Fine Particle Implementation Rule (72 FR 20586), were included in the inventories. The 

majority of the 2007 attainment year emissions inventory was prepared as part of SESARM’s contracted 

Southeastern Modeling, Analysis, and Planning (SEMAP) project. The majority of the projected 

emissions inventories were prepared by Georgia EPD. The attainment year and future year emissions 

were prepared for four source categories using different methods. The four source categories are: 

 Point sources (EGU and Non-EGU ) 

 Nonpoint sources (including fire) 

 Nonroad mobile sources (including marine, aircraft and railroad) 

 Onroad mobile sources 

1.0 Attainment Year Point Sources 

Emissions estimates for point sources in 2007 were obtained from SEMAP point source inventory 

v1.8. This inventory includes emissions estimates for 74 very large sources in 2007, 109 additional 

facilities in 2008, and 66 additional facilities in 2005, which were all submitted to EPA by the state of 

Georgia. This inventory also includes 19 facilities in CAMD database which were not included in the 

state submittal. For facilities with 2005 and 2008 emissions (but no 2007 emissions), 2007 emissions 

were estimated based on a linear interpolation between facility level 2005 and 2008 emissions on a 

pollutant-by-pollutant basis to calculate facility level 2007 emissions. For facilities with only 2008 data 

(no 2007 or 2005 data available), the SIC growth factors from the VISTAS Best&Final inventory were 

used to backcast 2008 reported emissions to 2007. For facilities with only 2005 data (no 2007 or 2008 

data available), the SIC growth factors from the VISTAS Best&Final inventory were used to project 2005 

reported emissions to 2007. After the above backcasting and projecting was performed, additional 

adjustments were made for facilities where only 2005 data were available and the facility did not operate 

in 2007 or operated for only part of 2007. Facilities that did not operate in 2007 were removed from the 

NIF files. For facilities that operated for part of 2007, the 2005 emissions were approximated for 2007 by 

multiply the 2005 emissions by a scaling factor of the number of days the facility operated in 2007 

divided 365 days of full year operation. Also, the end date in the NIF EM and PE tables were changed to 

reflect the actual date that the facility ceased operation. In addition, PM augmentation was performed to 

generate missing emissions estimates for filterable and primary PM2.5, filterable and primary PM10, and 

condensable PM. 

The SEMAP inventory went through review using EPA’s Basic Format and Content Checker tool 

(EPA 2004) which was used to verify the data was in the correct format, to check for referential integrity 

and duplicate record issues, and to check certain fields for proper valid codes and ranges. This inventory 

also went through several rounds of quality assurance (QA) reviews by State and local (S/L) agencies, as 

well as a review by SEMAP stakeholders. For more information regarding the SEMAP point inventory, 

please refer to Appendix C-1. 
Appendix C - Floyd County PM2.5 Nonattainment Area 

Redesignation Request and Maintenance Plan 

 2 

1.1 EGU Point Sources

Emissions estimates for EGU point sources in 2007 were obtained from SEMAP point source inventory 

v1.8. The only EGU point source in Floyd county is Plant Hammond (Units 1-4). Georgia Power 

provided updated PM and NH3 emissions data for all Georgia Power facilities. The revised PM emission 

values include condensable emissions which were previously missing from the inventory. 

Emissions in 2017 and 2023 were estimated using growth factors and control factors. Growth factors 

were calculated based on coal consumption records and forecasts for the Southeastern region in AEO2010. 

The SO2 control factor due to Flue Gas Desulfurization (FGD) was assumed to be 95% according to the 

VISTAS 2012 Projection Emissions Inventory. The NOx control factor due to Selective Catalytic 

Reduction (SCR) was assumed to be 82.5% according to the VISTAS 2012 Projection Emissions 

Inventory. The PM2.5 control factor due to FGD was assumed to be 50% according to Table 5.4-1 on 

page 5.4-24 of EPA document "Stationary Source Control Techniques Document for Fine Particulate 

Matter" (EC/R Incorporated, 1998). Table 1 contains control dates for Plant Hammond. Tables 2, 3, and 

4 contain a list of unit-specific SO2, NOx, and PM emissions for 2007, 2017, and 2023 and the associated 

growth and control factors for Plant Hammond. 

Table 1. EGU Control Dates for Plant Hammond (AIRS 11500003) 

POINTID NOx Control SO2 Control Other Controls 

Actual 

Operation 

Required 

Operation 

 rule (sss) 

Actual 

Operation 

Required 

Operation 

 rule (sss) 

SG01 NC NC 5/1/2008 12/31/08 Electrostatic precipitator (ESP) 

SG02 NC NC 5/1/2008 12/31/08 Electrostatic precipitator (ESP) 

SG03 NC NC 5/1/2008 12/31/08 Electrostatic precipitator (ESP) 

SG04 2002, 

5/1/2008* 

12/31/08 5/1/2008 12/31/08 Electrostatic precipitator (ESP) 

* Starting in 2002, SCR was operated during the ozone season. Year-round operation (required by rule (sss)) started 

May 1, 2008. 

NC = no control 

Table 2. SO2 emissions projection calculations for EGU point sources (tons) 

POINTID 2007 

(tons) 

2017 2023 

Growth 

Factor 

Control 

Factor 

Emissions Growth 

Factor 

Control 

Factor 

Emissions 

SG01 6028.200 1.013 95% 305.446 1.050 95% 316.338 

SG02 6047.400 1.013 95% 306.419 1.050 95% 317.346 

SG03 6147.900 1.013 95% 311.511 1.050 95% 322.620 

SG04 29585.300 1.013 95% 1499.073 1.050 95% 1552.530 

Table 3. NOx emissions projection calculations for EGU point sources (tons) 

POINTID 2007 

(tons) 

2017 2023 

Growth Factor Control Factor Emissions Growth Factor Control Factor Emissions 

SG01 1184.350 1.013 1200.209 1.050 1243.008 

SG02 1187.590 1.013 1203.493 1.050 1246.409 

SG03 1207.070 1.013 1223.234 1.050 1266.854 
Appendix C - Floyd County PM2.5 Nonattainment Area 

Redesignation Request and Maintenance Plan 

 3 

SG04 3979.070 1.013 82.5% * 1028.442 1.050 82.5%* 1065.115 

* In 2007, this unit’s SCR was operated during the ozone season only. The SCR will be operated year-round in 

2017 and 2023. Therefore, the fraction of NOx emissions during ozone season in 2007 was calculated using CEM 

data, and the SCR control factor for NOx projections was applied to non-ozone season emissions only. According to 

CEM data, the SCR was operated from April to September in 2007. 

Table 4. PM2.5 emissions projection calculations for EGU point sources (tons) 

POINTID 2007 

(tons) 

2017 2023 

Growth Factor Control Factor Emissions Growth Factor Control Factor Emissions 

SG01 99.560 1.013 50% 50.447 1.050 50% 52.246 

SG02 100.302 1.013 50% 50.823 1.050 50% 52.635 

SG03 101.673 1.013 50% 51.517 1.050 50% 53.354 

SG04 270.463 1.013 50% 137.042 1.050 50% 141.929 

1.2 Non‐EGU Point Sources

Emissions estimates for non-EGU point sources in 2007 were obtained from SEMAP point source 

inventory v1.8, as described in the section for base year point sources. Emissions in future years 2017 

and 2023 were estimated using SCC- and county-specific growth factors generated with the USEPA’s 

Economic Growth Analysis System version 5.0 (EGAS 5.0). Appendix C-7 contains a summary of the 

SCC-specific growth factors for Floyd County. Tables 5, 6, and 7 contain a list of specific non-EGU 

point sources in Floyd County and facility-specific SO2, NOx, and PM emissions for 2007, 2017, and 

2023. These emissions are not subject to additional controls in the future years 2017 and 2023. 

Table 5. SO2 emissions projection for non-EGU point sources (tons) 

PLANT ID FACILITY NAME 2007 2017 2023 

11500016 Temple-Inland - Rome Lumber Mill 0.000 0.000 0.000 

11500021 Temple-Inland (Rome Linerboard Mill) 3337.490 3535.286 3675.321 

11500077 Metal Container Corporation 0.071 0.079 0.086 

11500095 Packaging Products Corporation 0.014 0.016 0.017 

11500105 General Shale Brick, Inc. - Plant 40 129.011 160.740 181.929 

Table 6. NOx emissions projection for non-EGU point sources (tons) 

PLANT ID FACILITY NAME 2007 2017 2023 

11500016 Temple-Inland - Rome Lumber Mill 0.000 0.000 0.000 

11500021 Temple-Inland (Rome Linerboard Mill) 2591.150 2780.431 3025.787 

11500077 Metal Container Corporation 13.359 14.903 16.230 

11500095 Packaging Products Corporation 2.480 2.764 3.011 

11500105 General Shale Brick, Inc. - Plant 40 0.000 0.000 0.000 
Appendix C - Floyd County PM2.5 Nonattainment Area 

Redesignation Request and Maintenance Plan 

 4 

Table 7. PM2.5 emissions projection (tons) 

 

PLANT ID FACILITY NAME 2007 2017 2023 

11500016 Temple-Inland - Rome Lumber Mill 0.018 0.022 0.025 

11500021 Temple-Inland (Rome Linerboard Mill) 379.056 405.354 444.448 

11500077 Metal Container Corporation 1.349 1.569 1.754 

11500095 Packaging Products Corporation 0.200 0.223 0.243 

11500105 General Shale Brick, Inc. - Plant 40 0.000 0.000 0.000 

2.0 Nonpoint Sources 

Emissions from nonpoint sources in 2007 were obtained from the SEMAP nonpoint source inventory v1.1 

which was developed by Pechan. Pechan created a default 2007 nonpoint source inventory that includes 

all of the source categories covered by the 2008 nonpoint source NEI. For all source categories except 

industrial and commercial/institutional (ICI) fuel combustion, Pechan either directly incorporated 

emissions data from the 2008 nonpoint source NEI (when the NEI represented use of 2007 emissions 

activity data), or recalculated the NEI emission estimates to reflect 2007 activity levels (when the NEI 

reflected 2006 or 2008 activity levels) and/or to remove emissions associated with activity reflected in the 

point source inventory. For ICI fuel combustion, the 2008 nonpoint source NEI only developed 

emissions activity estimates, not emission estimates. Because of the potential importance of these source 

categories and the availability of methodological improvements, Pechan utilized an emissions estimation 

method for ICI fuel combustion incorporates a few refinements to the NEI method. These emissions were 

supplemented with carry-forward categories from 2005 GA CERR submission grown using EGAS. For 

more information regarding the SEMAP nonpoint inventory, please refer to Appendix C-2. 

Emissions in future years 2017 and 2023 were estimated using SCC- and county-specific growth 

factors generated with the USEPA’s Economic Growth Analysis System version 5.0 (EGAS 5.0). 

Appendix C-7 contains a summary of the SCC-specific growth factors for Floyd County. These 

emissions are not subject to additional controls in the future years 2017 and 2023. 

Emissions from fires in 2007 were obtained from SEMAP final “actual” fire emissions inventory. 

This inventory was developed using 2007 burned area data submitted by states, as well as updated fuel 

consumption and emissions factors (MACTEC, SEMAP document is not available yet). Emissions in 

future years 2017 and 2023 were assumed to be the same as attainment year 2007. 

3.0 Nonroad Mobile Sources 

The nonroad sector is comprised of nonroad engines included in EPA’s NONROAD model, such as 

recreational marine and land-based vehicles, farm, construction and industrial machinery, and lawn and 

garden equipment. This sector also includes engines not modeled in NONROAD, specifically aircraft, 

commercial marine vessels, and locomotives. 

3.1 NONROAD Model Category

Emissions from NONROAD model source categories in 2007 were obtained from the SEMAP final 

nonroad mobile sources emissions inventory. These emissions were calculated using NMIM2008, which 

incorporates EPA’s latest NONROAD model (NONROAD2008) released in April 2009, and reflects all 
Appendix C - Floyd County PM2.5 Nonattainment Area 

Redesignation Request and Maintenance Plan 

 5 

of EPA’s final nonroad standards to date. The county/monthly gasoline profile assignments in the 

CountyYearMonth table and the gasoline fuel profiles in the Gasoline table of the 2007 NMIM countylevel database (NCD) was updated with data provided by the State of Georgia. For more information 

regarding the SEMAP nonroad inventory, please refer to Appendix C-2. 

Emissions in future years 2017 and 2023 were also calculated using NMIM2008, using the same 

meteorological inputs as for 2007. Defaults in NMIM 2008 were used for other inputs in future years. 

3.2 Marine, Aircraft, and Locomotives

Emissions from commercial marine vessels (CMV), aircraft, and locomotives in 2007 were obtained 

from SEMAP final nonroad mobile sources emissions inventory. For more information regarding the 

SEMAP marine, aircraft, and locomotives inventory, please refer to Appendix C-2 (Pechan, 2010). 

Growth and control factors that were used to develop future year emissions were provided by Pechan. 

For more information regarding the SEMAP marine, aircraft, and locomotives growth and control factors, 

please refer to Appendix C-5. 

2007 CMV emissions in the SEMAP inventory were based largely on EPA’s 2008 NEI, and then 

were adjusted to represent 2007. Growth factors for residual CMVs were developed using average annual 

growth rates in USEPA regulatory impact analysis (RIA) to support their category 3 engine rulemaking. 

Growth factors for diesel engine CMV emissions were based on fuel consumption forecasts published by 

EIA. Control factors were developed using information from USEPA’s RIA. There were no CMV 

emissions in Floyd County. 

2007 aircraft emissions in the SEMAP inventory were primarily based on EPA’s 2008 NEI, which 

were back-cast to 2007 using approach operations by airport and aircraft type compiled from the FAA’s 

Air Traffic Activity Data System (ATADS) (FAA, 2010). Growth factors for all aircraft engine and 

airport-related SCCs were based on landing and take-off operation (LTO) projections available from the 

Federal Aviation Administration’s Terminal Area Forecasts (TAF) (FAA, 2010). Growth rates for 

military aircraft were held constant at 2007 levels. No control factors have been applied to aircraft for 

criteria pollutant forecasts. Tables 8, 9, and 10 contain a list of specific aircraft sources in Floyd County 

and SCC-specific SO2, NOx, and PM emissions for 2007, 2017, and 2023 and the associated growth 

factors. 
Appendix C - Floyd County PM2.5 Nonattainment Area 

Redesignation Request and Maintenance Plan 

 6 

Table 8. SO2 emissions projection for Aircraft (tons) 

State 

Facility 

Identifier 

Facility Name SCC Description 2007 2017 2023 

 Growth 

Factor 

Emissions Growth 

Factor 

Emissions 

2GA8 SHANNON 

FLIGHT 

STRIP 

2275050011 General 

Aviation - 

Piston 0.011 0.881 0.010 0.904 0.010 

2GA8 SHANNON 

FLIGHT 

STRIP 

2275050012 General 

Aviation - 

Turbine 0.004 0.881 0.004 0.904 0.004 

53GA DAWSON 

FIELD 

2275050011 General 

Aviation - 

Piston 0.009 0.881 0.008 0.904 0.008 

53GA DAWSON 

FIELD 

2275050012 General 

Aviation - 

Turbine 0.003 0.881 0.003 0.904 0.003 

RMG RICHARD B 

RUSSELL 

2275001000 Military 

Aircraft 0.003 1.000 0.003 1.000 0.003 

RMG RICHARD B 

RUSSELL 

2275050011 General 

Aviation - 

Piston 0.070 0.881 0.062 0.904 0.064 

RMG RICHARD B 

RUSSELL 

2275050012 General 

Aviation - 

Turbine 0.027 0.881 0.024 0.904 0.025 

Table 9. NOx emissions projection for Aircraft (tons) 

State 

Facility 

Identifier 

Facility Name SCC Description 2007 2017 2023 

 Growth 

Factor 

Emissions Growth 

Factor 

Emissions 

2GA8 SHANNON 

FLIGHT 

STRIP 

2275050011 General 

Aviation - 

Piston 0.073 0.881 0.065 0.904 0.066 

2GA8 SHANNON 

FLIGHT 

STRIP 

2275050012 General 

Aviation - 

Turbine 0.029 0.881 0.025 0.904 0.026 

53GA DAWSON 

FIELD 

2275050011 General 

Aviation - 

Piston 0.056 0.881 0.050 0.904 0.051 

53GA DAWSON 

FIELD 

2275050012 General 

Aviation - 

Turbine 0.022 0.881 0.019 0.904 0.020 

RMG RICHARD B 

RUSSELL 

2275001000 Military 

Aircraft 0.029 1.000 0.029 1.000 0.029 

RMG RICHARD B 

RUSSELL 

2275050011 General 

Aviation - 

Piston 0.458 0.881 0.403 0.904 0.414 

RMG RICHARD B 

RUSSELL 

2275050012 General 

Aviation - 

Turbine 0.178 0.881 0.157 0.904 0.161 
Appendix C - Floyd County PM2.5 Nonattainment Area 

Redesignation Request and Maintenance Plan 

 7 

Table 10. PM2.5 emissions projection for Aircraft (tons) 

State 

Facility 

Identifier 

Facility Name SCC Description 2007 2017 2023 

 Growth 

Factor 

Emissions Growth 

Factor 

Emissions 

2GA8 SHANNON 

FLIGHT 

STRIP 

2275050011 General 

Aviation - 

Piston 0.184 0.881 0.162 0.904 0.167 

2GA8 SHANNON 

FLIGHT 

STRIP 

2275050012 General 

Aviation - 

Turbine 0.072 0.881 0.063 0.904 0.065 

53GA DAWSON 

FIELD 

2275050011 General 

Aviation - 

Piston 0.142 0.881 0.125 0.904 0.128 

53GA DAWSON 

FIELD 

2275050012 General 

Aviation - 

Turbine 0.055 0.881 0.049 0.904 0.050 

RMG RICHARD B 

RUSSELL 

2275001000 Military 

Aircraft 0.077 1.000 0.077 1.000 0.077 

RMG RICHARD B 

RUSSELL 

2275050011 General 

Aviation - 

Piston 1.150 0.881 1.014 0.904 1.040 

RMG RICHARD B 

RUSSELL 

2275050012 General 

Aviation - 

Turbine 0.447 0.881 0.394 0.904 0.404 

2007 locomotive emissions in the SEMAP inventory were obtained from the Eastern Regional 

Technical Advisory Committee for Class I and Class II/III line haul locomotives and railyards. Passenger 

and commuter rail line emissions were grown from EPA’s 2002 NEI to 2007. For Class I and Class II/III 

line haul and diesel switchyard operations, Pechan calculated growth factors based on freight rail sector 

fuel consumption forecasts. For passenger and commuter rail, growth factors were developed from 

national forecasts of intercity rail diesel consumption, and commuter rail diesel consumption. Control 

factors were based on US EPA’s locomotive engine RIA and associated emission factor guidance. Tables 

11, 12, and 13 contain a list of specific locomotive sources in Floyd County and SCC-specific SO2, NOx, 

and PM emissions for 2007, 2017, and 2023 and the associated growth and control factors. 

Table 11. SO2 emissions projection for Locomotives (tons) 

SCC Description 2007 2017 2023 

Growth 

Factor 

Control 

Factor 

Emissions Growth 

Factor 

Control 

Factor 

Emissions 

2285002006 Class I 5.998 1.02 95.80 0.256 1.08 95.87 0.266 

2285002010 Yard 0.427 1.02 95.80 0.018 1.08 95.87 0.019 

Table 12. NOx emissions projection for Locomotives (tons) 

SCC Description 2007 2017 2023 

Growth 

Factor 

Control 

Factor 

Emissions Growth 

Factor 

Control 

Factor 

Emissions 

2285002006 Class I 526.634 1.02 34.86 348.409 1.08 52.00 271.928 

2285002010 Yard 48.403 1.02 17.27 40.668 1.08 30.92 35.967 
Appendix C - Floyd County PM2.5 Nonattainment Area 

Redesignation Request and Maintenance Plan 

 8 

Table 13. PM2.5 emissions projection for Locomotives (tons) 

SCC Description 2007 2017 2023 

Growth 

Factor 

Control 

Factor 

Emissions Growth 

Factor 

Control 

Factor 

Emissions 

2285002006 Class I 18.442 1.02 53.97 8.621 1.08 69.84 5.983 

2285002010 Yard 1.474 1.02 30.77 1.037 1.08 43.08 0.903 

4.0 Onroad Mobile 

SO2, NOx and PM2.5 emissions from onroad mobile sources in 2007 and 2023 were developed by the 

Georgia Department of Transportation using MOVES2010a. MOVES was run at the county level for 

Floyd County in inventory mode for a July day in Year 2007 and 2023. Average 2007 annual daily 

meteorological inputs were used in both runs. Best available local data for MOVES inputs such as 

vehicle population, vehicle miles traveled (VMT) by source types, road type distribution, speed 

distributions, ramp fractions, hourly VMT fractions and age distribution were used. Please refer to 

Appendix C-3 for more detailed information. 

5.0 QA/QC 

Detailed QA/QC efforts for point and fire sources were documented in MACTEC’s 2009 Quality 

Assurance Project Plan (Appendix C-8), and QA/QC efforts for nonroad and area sources can be found in 

E.H. Pechan’s 2009 QAPP (Appendix C-9). Onroad mobile source emissions were provided by the 

Georgia Department of Transportation, and were reviewed by running MOVES independently at Georgia 

EPD. All MOVES input files have been carefully checked. 

References 

MACTEC, 2009. Quality Assurance Project Plan for Point Source, On-Road, and Fire Base Year, Future 

Year, and Control Strategy Emissions Inventories. 

MACTEC, 2011, Development of the Point Source Emission Inventory for 2007 in the SESARM Region 

(Version 1.8) 

EC/R Incorporated, 1998, Stationary Source Control Techniques Document for Fine Particulate Matter, 

obtained from http://www.epa.gov/ttncatc1/dir1/finepmtech.pdf , accessed on 1/19/2011. 

E.H. Pechan & Associates, Inc. 2009. Quality Assurance Project Plan for Non-Road and Area Source 

Base Year and Future Year Emissions Inventories. 

E.H. Pechan & Associates, Inc. 2010. Area and Nonroad 2007 Base Year Inventories Final Report. 

E.H. Pechan & Associates, Inc. 2011. Growth and Control Factor Development for Aircraft, Commercial 

Marine Vessels, and Locomotives 

EPA, 2010. U.S. Environmental Protection Agency, EGAS Version 5.0, available for download from 

http://www.epa.gov/ttnecas1/egas5.htm, accessed March 2010.