David Branecky 

OGE Energy Corp. 	 PO Box 321 

Oklahoma City, Oklahoma 73101-0321 

405-553-3000 

www.oge.com 

RE: Best Available Retrofit Technology (BART) Waiver Application 

Oklahoma Gas and Electric Company 

Horseshoe Lake Generating Station Units 7 & 8 and 

Seminole Generating Station Units 1,2 & 3 

Dear Mr. Terrill: 

Pursuant to OAC 252:100-8-73, Oklahoma Gas and Electric Company (OG&E) is applying for 

a waiver from the requirement to install, operate and maintain BART. The enclosed modeling 

demonstrates that Horseshoe Lake Units 7 & 8 and Seminole Units 1, 2 & 3 do not cause or 

contribute to a significant impainnent of visibility in Class I areas within 300 kill of the 

sources. If you have any questions or comments, please contact Melody Martin at 553-3297 or 

me at 553-3690. 

Sincerely, 

.'.~ 

Manager Air Quality 

Enclosure 

Cc: Kimber Shoop 

Chuck Wehland 

IXOS id: 3811,3812 

November 30, 2006 

HAND DELIVERED 

Mr. Eddie Terrill 

Oklahoma Department ofEnvironmental Quality 

Air Quality Division 

P.O. Box 1677 

Oklahoma City, Oklahoma 73101-1677 

RECEIVED 


DEC'o.d 'Z006 


AIR QUALITY 

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I 
 CALPUFF BART MODELING REpORT • REFINED ANALYSIS 

OKLAHOMA GAS & ELECTRIC COMPANY I 


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 UEC'O.j 2006 
 HORSESHOE LAKE GENERATING STATION 

I I ,~,Ii~QUALITY 


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 RECEl\'ED

I DEC'O 17nn~ I 
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 .. _-_ .. - -~.:.. ,~-~.~~. ~,-.. ,..

AIR QUALITY ,I 


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Prepared by: 

Vern Choquette ill Principal Consultant 

Don Whitney, PE • Managing Consultant 

Eugene Chen, PE • Senior Consultant 

Jeremy Townley • Consultant 

TRINITY CONSULTANTS 


120 East Sheridan 


Suite 205 


Oklahoma City, OK 73104 


(405) 228-3292 


November 28, 2006 

Project 063701.0003 

n.. 1iitlrityA \JJnsu tants 

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I 
 TABLE OF CONTENTS 


I 1. EXECUTIVE SUMM"ARY..•...••••••••••••••.•.••.........................•..•.................•••••••••••...••• 1-1 


1.1 BACKGROUND....................................................................................................... 1-1 


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 1.2 OBJECTIVE ............................................................................................................ 1-1 


1.3 LOCATION OF SOURCES AND RELEVANT CLASS I AREAS ..................................... 1-2 


2. CALPUFF MODELING SySTEM.••••.••••••••••••••••••••••••••••••...••.••.•.......••..•.......•••••••• 2-1
 I 2.1 MODEL VERSIONS ................................................................................................. 2-1 


2.2 MODELING DOMAIN ............................................................................................. 2-2 


I 3. CALMET ............................................................................................................ 3-1 


3.1 GEOPHYSICAL DATA ............................................................................................. 3-1 


3.1.1 TERRAIN DATA ................................................................................................... 3-1
 I 3.1.2 LAND USE DATA ................................................................................................. 3-1 


3.2 METEOROLOGICAL DATA ..................................................................................... 3-2 


3.2.1 MESOSCALE MODEL DATA................................................................................. 3-2
 I 3.2.2 SURFACE DATA ................................................................................................... 3-2 


3.2.3 UPPER AIR DATA ................................................................................................ 3-3 


3.2.4 PRECIPITATION DATA ......................................................................................... 3-3 


I 3.3 CALMET PROCESSING CONTROL ........................................................................ 3-4 


4. CALPUFF........................................................................................................... 4-1 


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 4.1 BART-ELIGIBLE SOURCES ................................................................................... 4-1 


4.2 SOURCE EMISSIONS DATA .................................................................................... 4-1 


4.2.1 PMIOEMISSIONS..................................................................................................4-2 


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 4.2.2 STACK PARAMETERS ........................................................................................... 4-3 


4.3 RECEPTOR LOCATIONS .......................................................................................... 4-3 


4.4 BACKGROUND OZONE ....................... '" ................................................................ 4-4 


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 4.5 BACKGROUND AMMONIA ..................................................................................... 4-4 


4.6 CALPUFF MODEL CONTROL PARAMETERS ........................................................ 4-5 


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 5. CALPOST........................................................................................................... 5-1 


5.1 LIGHT EXTINCTION ALGORITHM ........................................................................... 5-1 


5.2 CALPOST PROCESSING METHOD ......................................................................... 5-1 


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 5.3 NATURAL BACKGROUND ..................................................;................................... 5-2 


5.4 EVALUATING BART-EXEMPTION ......................................................................... 5-2 


5.5 SUMMARY OF CALPOST CONTROL PARAMETERS ............................................... 5-2 


I 6. MODEL RESULTS ................................................................................................. 6-1 


APPENDIX A - EMISSION DATA I 
 APPENDIX B - DATA FILE LIST 

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LIST OF FIGURES 

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TABLE 2-1. CALPUFF MODELING SYSTEM VERSION NUMBERS ......................................................... 2-1 


TABLE 2-2. VERTICAL GRID STRUCTURE ........................................................................................... 2-3 


TABLE 3-1. SUMMARY OF CALMET INPUTS ..................................................................................... 3-5 


TABLE 4-1. CONSTRUCTION DATE SUMMARY ................................................................................... 4-1 


TABLE 4-2. ESTIMATED 24-HOUR AVERAGE EMISSION RATES ........................................................ .4-2 


TABLE 4-3. SPECIATED PMIO EMISSIONS .. ; ................................................................... , ..................... 4-2 


TABLE 4-4. POINT SOURCE STACK PARAMETERS .............................................................................. 4-3 


TABLE 4-5. SUMMARY OF CALPUFF INPUTS ................................................................................... .4-5 


TABLE 5-1. MONTHLY HUMIDITY FACTORS ...................................................................................... 5-1 


TABLE 5-2. DEFAULT AVERAGE ANNUAL NATURAL BACKGROUND LEVELS ................................... 5-2 


TABLE 5-3. SUMMARY OF CALPOST INPUTS ................................................................................... 5-2 


TABLE 6-1. VISIBLITY IMPACT MODEL RESULTS FROM CANEY CREEK 2001-03 .............................. 6-1 


TABLE 6-2. VISIBLITY IMPACT MODEL RESULTS FROM WICHITA MOUNTAINS 2001-03 .................. 6-2 


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I LIST OF TABLES 

I FIGURE 1-1. LOCATION OF HORSESHOE LAKE STATION AND NEARBY CLASS I AREAS ................... 1-1 


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 FIGURE 2-1. PROPOSED MODELING DOMAIN ..................................................................................... 2-2 


FIGURE 3-1. PLOT OF MODELING DOMAIN USGS TERRAIN DATA ................................................... 3-1 


I FIGURE 3-2. PLOT OF SURFACE STATIONS ......................................................................................... 3-3 


FIGURE 3-3. PLOT OF PRECIPITATION STATIONS ................................................................................ 3-4 


I FIGURE 4-1. CANEY CREEK WILDERNESS RECEPTOR LOCA TIONS .................................................... 4-3 


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 FIGURE 4-2. WICHITA MOUNTAlNS WILDERNESS RECEPTOR LOCA TIONS ......................................... 4-4 


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I 1. EXECUTIVE SUMMARY 

I 1.1 BACKGROUND 

I On July 1, 1999, the U.S. Environmental Protection Agency (EPA) published the final Regional Haze 

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Rule (RHR). The objective of the RHR is to improve visibility in 156 specific areas across the United 

States, known as Class I areas. The Clean Air Act defines Class I areas as certain national parks (over 

6,000 acres), wilderness areas (over 5,000 acres), national memorial parks (over 5,000 acres), and 

international parks that were in existence on August 7, 1977. 

I On July 6, 2005, the EPA published amendments to its 1999 RHR, often called the BART rule, which 

included guidance for making source-specific Best Available Retrofit Technology (BART) 

determinations. The BART rule defines BART-eligible sources as sources that meet the following 

I criteria: 

(1) Have potential emissions of at least 250 tons per year of a visibility-impairing pollutant, 

I (2) Were "in existence" between August 7, 1962 and August 7, 1977, and 

(3) Are listed as one ofthe 26 listed source categories in the guidance. 

I A BART-eligible source is not automatically subject to BART. Rather, BART-eligible sources are 

subject-to-BART ifthe sources are "reasonably anticipated to cause or contribute to visibility 

impairment in any federal mandatory Class I area." EPA has determined that sources are reasonably 

I anticipated to cause or contribute to visibility impairment if the visibility impacts from a source are 

greater than 0.5 deciviews (dv) when compared against a natural background. 

I Air quality modeling is the tool that is used to determine a source's visibility impacts. States have the 

authority to exempt certain BART-eligible sources from installing BART controls if the results of the 

dispersion modeling demonstrate that the source cannot reasonably be anticipated to cause or 

I contribute to visibility impairment in a Class I area. Further, states also have the authority to define 

the modeling procedures for conducting modeling related to making BART determinations. 

I To promote consistency between states in the development ofBART modeling protocols and to 

harmonize the approaches between adjacent RPOs, CENRAP developed BART Modeling Guidelines 

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(December 15,2005). The intent ofthe guidelines is to assist CENRAP states and source operators in 

the development of statewide and source-specific modeling protocols. 

1.2 OBJECTIVE 

I The objective of this document is to provide a report summarizing the model results and the modeling 

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methods and procedures that were followed by Trinity when conducting refined modeling for 

Oklahoma Gas & Electric's (OG&E) Horseshoe Lake Generating Station near Harrah, OK. 

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1.3 LOCATION OF SOURCES AND RELEVANT CLASS I AREAS 

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I OG&E's Horseshoe Lake station is located due north of Harrah, OK, and is a PSD major source of 

emissions. The facility is an electricity generating station and operates mUltiple natural-gas fired 

utility boilers. OG&E has identified the sources listed in Appendix A at the Horseshoe Lake station 

as sources that meet the three criteria for being BART-eligible sources. These sources include: 

I .. HL7, 2,379 MMBtu/hr Boiler, Babcock&Wilcox 

.. HL8, 3,960 MMBtulhr Boiler, Combustion Engineering 

I A detailed summary of BART-eligibility is included in Section 4.1. Figure 1-1 provides a plot of the 

location of the Horseshoe Lake station in relation to its neighboring Class I areas. 

I As required in CENRAP's BART Modeling Guidelines, Class I areas within 300 km ofthe plant 

were included in this screening analysis. The following Table contains the four surrounding Class I 

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areas and the distances they are from the Horseshoe Lake station. As seen below, the Wichita 

Mountains NWR and Caney Creek Wilderness fall within this radius. 

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Class I Area Name Distance from source (km) 

1 Caney Creek Wilderness 300 

Hercules-Glades Wilderness 398 

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Upper Buffalo Wilderness 337 


Wichita Mountains National Wildlife Refuge 157 


I 1.4 MODEL RESULTS 

Model results from the refined analysis are included in Section 6. The tables in Section 6 indicate 

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I that the 98th percentile visibility impairment values are below the 0.5 dv threshold described in 

CENRAP's BART Modeling Guidelines (December 15,2005). These results indicate that the 

Horseshoe Lake Station is eligible for a waiver from BART requirements. 

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FIGURE 1-1. LOCATION OF HORSESHOE LAKE STATION AND NEARBY CLASS I AREAS 

Note: Horseshoe Lake Station, Class I area, and domain boundary locations presented above are approximations for visual purposes and are not exact. 

1-1 Oklahoma Gas & Electric Co. Trinity Consultants 


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2. CALPUFF MODELING SYSTEM 

The main components of the CALPUFF modeling system are CALMET, CALPUFF, and CALPOST. 

CALMET is the meteorological model that generates hourly three-dimensional meteorological fields 

such as wind and temperature. CALPUFF simulates the non-steady state transport, dispersion, and 

chemical transformation of air pollutants emitted from a source in "puffs". CALPUFF calculates 

hourly concentrations ofvisibility affecting pollutants at each specified receptor in a modeling 

domain. CALPOST is the post-processor for CALPUFF that computes visibility impacts from a 

source based on the visibility affecting pollutant concentrations that were output by CALPUFF. 

2.1 MODEL VERSIONS 

Earth Tech, Inc. is the primary developer ofthe CALPUFF modeling system and all related programs. 

The versions of the CALPUFF·modeling system programs that Trinity used for OG&E's modeling 

are listed in Table 2-1. Table 2-1 also compares the program versions that Trinity used with the 

program versions recommended by CENRAP. Note that some of the program versions are not the 

same as the program versions recommended by CENRAP. Certain programs are being utilized in 

order to avoid data compatibility issues with previous versions of the CALPUFF system. Trinity used 

the following software version numbers listed below. Model selection was primarily driven by a 

desire to utilize the most recent release of CALMET. CALPUFF and CALPOST executable versions 

were then selected as appropriate for compatibility. 

TABLE 2-1. CALPUFF MODELING SYSTEM VERSION NUMBERS 

Program CENRAP Suggested 

Horsehoe Lake 

Refined Analysis 

Version Level Version Level Reason for Difference 

TERREL 3.311 030709 3.311 030709 

CTGCOMP 2.42 030709 2.22 030528 Version recommended is not 

available 

CTGPROC 2.42 030709 2.42 030709 

MAKEGEO 2.22 030709 2.22 030709 

CALMM5 2.4 050413 2.4 050413 

CALMET 5.53a 040716 6.211 060414 . Most recent release of 

TALMET 

CALPUFF 5.711a 040716 6.112 060412 Use version compatible with 

CALMET v6.211 

POSTUTIL 1.4 040818 1.4 040818 

CALPOST 5.51 

" 

030709 6.131 060410 Use version compatible with 

CALPUFF 6.112 

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2.2 MODELING DOMAIN 

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I Trinity utilized a modeling domain that extends at least 50 km in all directions beyond the Horseshoe 

Lake Station and each its surrounding Class I areas. Note that while Upper Buffalo and HerculesGlades are included in the domain, these Class I areas are more than 300 km from the Horseshoe 

Lake Station. The map projection for the modeling domain is Lambert Conformal Conic (LCC) and 

the coordinate system will be North American Datum 1927 (NAD27), which is an LCC projection. 

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 The meteorological grid spacing is 3 km. 


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The southwest comer of the modeling domain is Latitude 34.00oN, Longitude 100.5°W which was 


assigned as the 0, 0 reference point for the domain. The northeast comer of the modeling domain is 


approximately Latitude 37.25°N, Longitude 92°W. At a grid spacing of 3 km, the number of X grid 

cells is 256 and the number ofY grid cells will be 155. 

I Figure 2-1 provides a plot of the modeling domain with respect to the sources and Class I areas. 

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450 

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'c! 

: 8 250 

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E :€ 

: 8 200 

ai 

I ~15O 

100 

I 50 

o 

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FIGURE 2-1. PROPOSED MODELING DOMAIN 

'" : - - - - - - - - - - - - - - - - - - - - - - - - - - J~PI;_:O- - - -~- -: 

: He/cul':Glades I 

I '----J : 

: TUI~OK Fayatte~l£t~ :

I J QUPlle/_ uffalo

OG&E HOrle.hoe Lake Piont (1)- !If - -

Oklah oma CitLOK 

Norm~n_OK 

Wicllha MOluJtain~ - Ell 


Lawton_OK 


~---------------------------------------

-50 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 BOO 

Lambert Confo/mal Conic (X) (km) 

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For the purposes ofthis analysis, the CALMET and CAL PUFF domains are identical for each 

analysis and are singularly referred to herein as the "domain." 

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The horizontal domain is comprised of grid cells, each containing a central grid point at which 

meteorological and computational parameters are calculated at each time step. For this analysis, grid 

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spacing intervals of3 km were selected to resolve terrain features within the domain. Table 2-2 

summarizes the vertical grid structure selected for both analyses. The cell face height of each cell 

indicates its vertical extent. The vertical domain is also composed ofterrain-following grid cells, the 

number and size of which are chosen so as to constrain the boundary layer in which dispersion and 

chemical transformations take place. 

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TABLE 2-2. VERTICAL GRID STRUCTURE 

Cell Face Height 

Vertical Grid Cell (meters) 

1 20 

2 40 

3 80 

4 160 

5 320 

6 640 

7 1,200 

8 2,000 

9 3,000 

10 4,000 

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I 3. CALMET 

I 
 Trinity conducted a three-year CALMET analysis incorporating both mesoscale model and 


observation meteorological data to generate three years of CALMET outputs to be used as inputs to 


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CALPUFF. The CALMET model requires the input ofgeophysical data, meteorological data, and 


model parameter settings. The CALMET modeling procedures that Trinity is proposing to use 


generally follow the recommendations in CENRAP's protocol. It should be noted that Trinity used 


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surface and precipitation data but not upper air observations in this CALMET analysis. As a result, 


some ofCENRAP's recommendations may not apply. 


I 3.1 GEOPHYSICAL DATA 

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CALMET requires geophysical data to characterize the terrain and land use parameters that 

potentially affect dispersion. Terrain features affect flows and create turbulence in the atmosphere 

and are potentially subjected to higher concentrations of elevated puffs. Different land uses exhibit 

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variable characteristics such as surface roughness, albedo, Bowen ratio, and leaf-area index that also 

effect turbulence and dispersion. 

3.1.1 TERRAIN DATA 

I Trinity used terrain data obtained from the United States Geological Survey (USGS) in 1­

degree (1 :250,000 scale or approximately 90 meter resolution) digital format. A list ofthe 

USGS terrain files that were used is provided in Appendix B. A plot ofthe l~md elevation 

I for the modeling domain based on the referenced files is provided in Figure 3-1. 

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I Trinity input the USGS terrain data into the TERREL program to generate grid-cell 

elevation averages across the modeling domain. 

I 	 3.1.2 LAND USE DATA 

I 	 Trinity used USGS Composite Theme Grid (CTG) fonnat Land Use and Land Cover 

(LULC) data files at 1 :250,000 resolutions. Where 1 :250,000 land use data is not 

available, Trinity used USGS data at 1: 100,000 resolutions. A list of the USGS land use 

files that were used is provided in Appendix B. A plot ofLULC data over the modeling I domain is presented in Figure 3-2below. 

I 	 FIGURE 3-2. PLOT OF MODELING DOMAIN LULC DATA 

I 400 

I 90 

E 

~ 

E 300 

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c 

0 

() 

iG 

.E 

c 200 I 	 0

E 

() 

1:: 

Q) 

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E 

I'CI 

--' 

100 

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I Trinity input the LULC data into the CTGPROC program to generate land use for each grid 

cell across the modeling domain. Since the USGS CTG format LULC data files must be 

compressed prior to use in the CTGPROC utility processor, Trinity compressed the files I using the program CTGCOMP. 

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10 = Urban 

20 = Agricu ~ural Land 

30 = Rangeland 

40 =Forest Lan d 

50 = Water 

60 = Wetland 

70 = Barren Land 

80 = Tundra I 90 = Perennial Snow or Ice 
-------------------

FIGURE 3-1. PLOT OF MODELING DOMAIN USGS TERRAIN DATA 

j

.. 

0-1 34 

Mrurs (Above MSL) 

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3.2 METEOROLOGICAL DATA 

I CALMET was used to assimilate data for 2001,2002, and 2003 using mesoscale model output and 

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National Weather Service (NWS) surface station observations, upper air station observations, and 

precipitation station observations to develop the meteorological field. 

3.2.1 MESOSCALE MODEL DATA 

I Hourly mesoscale data was used to supplement the hourly surface, upper air, and 

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precipitation observation data. The mesoscale data was used to define the initial guess 

field for the CALMET simulations. Trinity used the following 5th generation mesoscale 

model meteorological data (or MM5 data): 

• 2001 MM5 data (12 kIn resolution), 

I • 2002 MM5 data (36 kIn resolution), and 

• 2003 MM5 data (36 kIn resolution) 

I 3.2.2 SURFACE DATA 

The use ofmUltiple stations for meteorological observations in CALMET/CALPUFF 

provides a substantial enhancement over the steady-state treatment of observations from a I single meteorological station. Parameters affecting turbulent dispersion that are observed 

hourly at surface stations include wind speed and direction, temperature, cloud cover and 

ceiling, relative humidity, and precipitation type. Surface data were extracted from among I the surface stations listed in Appendix B and are illustrated in Figure 3-3. These sources 

were selected from the available data inventory to optimize spatial coverage and 

representation of the domain. Raw observations from these stations were obtained from I the National Climatic Data Center (NCDC), quality assured and were merged using the 

SMERGE pre-processor to create a single assimilated data file of surface observations for 

each year analyzed. I 

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FIGURE 3-3. PLOT OF SURFACE STATIONS 

550 I KCNU 

KICWiI'S I 500 & & 

KPPF KSGF r - - - - - - - -Kii2a- - - - - - - - - - - - - -&- - - -KJL.N- - - - -&- - - - ­ --I

450 & KW..D KCFV & I 

KLBL 

• 

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~G KFLP

KHRO 

350 K~G KSLG 

KS\I\IO 

KGIlG KTUL 

KFYV I E 300 Upper_Buffalo

• ! 

KMKO 

'r:!: 

u 

OG&E Horseshoe LaJQ! Plant 0 

KOKI5TIK. - ­ KFSM

I ~ 250 KCSM & & 

§ KqJN KL~F 

KH8R KMLC KLI~I ~ 200 & I 

OJ KMWT

- I 

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'" .0 KHOT WiChitiUv10untainl KLi'W I !6 150 ...J KCDS CaneLCreek I I & KI1'R K~M 

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100 

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 KF39 KPRX 

50 KTXK 

KELD 

~ _______________K~O__ ~KI_____________________I 

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-50 

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Lambert Conformal Conic (Xl (kml 

3.2.3 UPPER AIR DATA I Upper air observations were not used in this CALMET analysis (i.e., NOOBS = 1). 

I 3.2.4 PRECIPITATION DATA 

I The effects of chemical transformations and deposition processes on ambient pollutant 

concentrations was considered in this analysis. Therefore, it is necessary to include 

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observations of precipitation in the CALMET analysis. The precipitation stations from 

which Trinity extracted data are listed in Appendix B. The locations of the precipitation 

stations with respect to the modeling domain are shown in Figure 3-4. These stations were 

selected from the available data inventory to optimize spatial coverage and representation 

I ofthe domain. Data from the stations was processed for use in CALMET using Version 

5.31, Level 030528 ofEPA's PMERGE program. 

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FIGURE 3-4. PLOT OF PRECIPITATION STATIONS 

, GARDEN 

iOLA1 UC , -------~-------~~~----- WICHlT 


SUE1ET 


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IRlvERS poNcA

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.. . . PUlIOBART LEHIGH DUNCAN I CHltOR C.aNEY 1 I 

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JOrlLIN 

SPRING 

SENECA 

, FORTS 

GU.aeR 

aomll,I, GR~ERS 

1 

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CLN<KS 

Boa,Ii'9M 

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fiNE a 

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Lambert Conformal Conic (Xl (km) 

3.3 CALMET PROCESSING CONTROL 

I Table 3-1 provides a listing of the CALMET parameters that Trinity used in OG&E's modeling 

analysis. In addition to the parameters that were used for OG&E's modeling, the table also lists 

CENRAP's recommended parameters for comparison. In cases where a parameter to be used is 

I different than what CENRAP recommended, a short explanation as to the difference is proved. Note 

that most of the differences from CENRAP's recommended parameters are due to the inclusion of 

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observation data into the modeling analysis, since CENRAP's parameters are based on a noobservation analysis. 

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TABLE 3-1. SUMMARY OF CALMET INPUTS 

CALMET Variable Description 

Value Included in 

CENRAP Protocol 

Value Trinity 

Will Use Notes 

NUSTA Number of upper air 

data sites 

0 0 Only surface and 

precipitation 

observations were 

used 

NOWSTA Number of overwater 

data sites 

0 0 

IBYR . Starting year 2001 Appropriate 

met year 

Years 2001, 2002, 

2003 

IBMO Starting month 1 Appropriate 

month 

Due to file size, 

analysis was 

completed by month 

IBHR Starting hour 1 1 

IBTZ Base time zone 6 6 , 

IRLG Length of run 6 Varies with 

month 

Due to file size, 

analysis was 

completed by month 

IRTYPE Run type (1 for 

CALPUFF) 

1 1 

LCALGRD Compute CALFRlD 

data fields (T = run 

CALGRlD) 

F F 

lTEST Stop run after SETUP 

to do input QA (2 

run) 

2 2 

PMAP Map projection LCC LCC 

RLATO Latitude (decimal 

degrees) of projection 

origin 

40N 33.25N Appropriate for 

domain 

RLONO Longitude (decimal 

degrees) of projection 

origin 

97W lOO.5W Appropriate for 

domain 

XLATl Latitude of 1st 

standard parallel 

33N 33N Appropriate for 

domain 

XLAT2 Latitude of 2nd 

standard parallel 

45N 40N Appropriate for 

domain 

DATUM Datum region for 

output coordinates 

WGS-G WGS-G Selected datum to 

match datum of 

land use data 

NX Number ofX grid 

cells in 

meteorological grid 

300 256 Appropriate for 

domain 

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CALMET Variable Description CENRAP Protocol Will Use Notes 

NY Number ofY grid 192 155 Appropriate for 

cells in domain 

meteorological grid 

DGRIDKM Grid spacing (lan) 6.0 

~ Refined grid 

spacing 

XORIGKM Ref. coordinate of -1008 0 Appropriate for 

SW comer of grid domain 

cell 

YORIGKM Ref. coordinate of 0.0 0 Appropriate for 

SW comer of grid domain 

cell 

NZ Number of vertical 10 10 

layers 

ZFACE Vertical cell face 0, 20, 40, 80, 160, 0, 20, 40, 80, 

heights (NZ + 1 320,640,1200,2000, 160, 320,640, 

values) 3000,4000 1200,2000, 

3000,4000 

LSAVE Save met. data fields T T 

in an unformatted 

file? 

IFORMO Type of unformatted 1 1 

output file (1 for 

CALPUFF) 

LPRINT Print met. fields F F 

IPRINF Print intervals 1 1 

IUVOUT(NZ) Specify layers ofu,v NZ*O NZ*O 

wind components to 

print 

IWOUT(NZ) Specify layers ofw NZ*O NZ*O 

wind component to 

print 

ITOUT(NZ) Specify layers of 3D NZ*O NZ*O 

temperature field to 

print 

LDB Print met data and F F 

variables 

NN1 First time step for 1 1 

debug data to be 

printed 

NN2 Last time step for 1 2 Generated debug 

debug data to be data for a total of 2 

printed time steps 

IOUTD Control variable for 0 o· 

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Value Included in 

CALMET Variable Description CENRAP Protocol 

writing test/debug 

wind fields 

NZPRN2 Number of levels 0 

starting at surface to 

print 

lPRO Print interpolated 0 

wind components 

lPRl Print terrain adjusted 0 

surface wind 

components 

IPR2 Print initial 0 

divergence fie 

IPR3 ::tfinal 0 

direction 

lPR4 Print final div 0 

fields 

lPR5 Print winds after 0 

kinematic effects 

IPR6 Print winds after 0 

Froude number 

adjustment 

IPR7 Print winds after 0 

slope flows are added 

lPR8 Print final wind 0 

components 

NOOBS No observation mode 2 

(2 = No surface, 

overwater, or upper 

air observations; use 

MM5 for surface, 

overwater, and upper 

air data) 

NSSTA Number of 0 

meteorological 

stations in 

SURF.DAT file t 

NPSTA Number of 0 

precipitation stations 

in PRECIP.DA T file 

ICLOUD Gridded cloud fields 3 

(0 = no, 3 = Gridded 

cloud cover from 

prognostic relative 

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Value Trinity 

Will Use 

1 

0 

0 

0 

0 

0 

0 

0 

0 

0 

1 

~ 

~ 

0;} 

L.O~ 

----- ( ~-~3, 

---

Notes 

Default 

Used surface and 

precipitation 

observations 

Number ofstations 

Number ofstations 

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Value Included in 

CENRAP Protocol 

Value Trinity 

Will Use Notes 

humidity) 

IFORMS Format ofsurface 

data (2 =formatted) 

2 2 

IFORMP Format of 

precipitation data (2 

= formatted) 

2 2 

IFORMC Format of cloud data 

(2 formatted) 

2 1 NtA - No cloud data 

used in model 

IWFCOD 

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Generate winds by 

diagnostic wind 

module? (l yes) 

1 1 

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IFRADJ Adjust winds using 

Froude number 

effects? (1 =yes) 

1 1 

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IKINE Adjust winds using 

kinematic effects? (0 

no) 

0 1 Computed 

kinematic effects in 

this analysis 

IOBR Use O'Brien 

procedure for vertical 

winds? (0 no) 

0 0 

ISLOPE Compute slope 

flows? (1 = yes) 

1 1 

/~ IEXTRP Extrapolate surface 

winds to upper layers 

(-1 no extrapolation 

and ignore layer 1 of 

upper air station data) 

-1 

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ICALM Extrapolate surface 

winds even if calm? 

(0 = no) 

0 0 

BIAS Layer dependent 

biases weighting aloft 

measurements 

0, 0, 0, 0, 0, 0, 0, 0, 0, 

° 

0, 0, 0, 0, 0, 0, 

0,0,0,0 

RMIN2 Minimum vertical 

extrapolation distance 

Distance (km) around 

an upper air site 

where vertical 

extrapolation is 

excluded (set to -1 if 

IEXTRP ±4) 

-1 -1 

IPROG U sing prognostic or 14 14 

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Value Included in 

CENRAP Protocol 

Value Trinity 

Will Use Notes 

MM-FDDA data? (14 

=Use winds from 

MM5.DAT as initial 

guess wind field) 

ISTEPPG Timestep (hours) of 

theMM5 data 

1 1 

~~ 

LVARY Use varying radius of 

influence to develop 

surface winds? 

T ~ T Y 

1"­ --­

)use FLAG default 

RMAXI Maximum radius of 

influence over land in 

surface layer (km) 

30 100 As included in 

IWAQM Phase 2 

case study 

RMAX2 Maximum radius of 

influence over land 

aloft (km) 

30 500 As included in 

IWAQM Phase 2 

case study 

RMAX3 Maximum radius of 

influence over water 

(km) 

50 36 Same as MM5 data 

spacing 

RMIN Minimum radius of 

influence used 

anywhere (km) 

0.1 0.1 

TERRAD Radius ofinfluence 

ofterrain features 

(km) 

12 12 

Rl Weighting offirst 

guess surface field 

(km) 

1 50 As included in 

IWAQM Phase 2 

case study 

R2 Weighting offirst 

guess aloft field (km) 

1 100 As included in 

IWAQM Phase 2 

case study 

RPROG MM5 windfield 

weighting parameter 

(km) 

0 0 

DIVLIM Maximum acceptable 

divergence 

5.E-6 5.E-6 

NITER Max number of 

passes in divergence 

minimization 

50 50 

NSMTH Number ofpasses 

through smoothing 

filter in each layer of 

CALMET(NZ 

values) 

2,4,4,4,4,4,4 2, 4, 4, 4, 4, 4, 

4,4,4,4 

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NITR2 

Description 

Max number of 

stations used in each 

layer for the 

interpolation ofdata 

to a grid point (NZ 

values) 

Value Included in 

CENRAP Protocol 

Value Trinity 

Will Use Notes 

5, 5, 5, 5, 5, 5, 5, 5, 5, 

5 

5, 5, 5, 5, 5, 5, 

5,5,5,5 

CRITFM Critical Froude 

number 

1.0 1.0 

ALPHA Kinematic effects 

parameter 

0.1 0.1 

FEXTR2 Scaling factor for 

extrapolating surface 

winds aloft 

NZ*O.O NZ*O.O 

NBAR Number ofterrain 

barriers 

0 0 

IDIOTPI Compute temperature 

from observations (0 

= true) 

0 0 

ISURFT Surface station to use 

for surface 

temperature (between 

1 and NSSTA) 

4 4 

IDIOPT2 Domain-averaged 

wind component 

switch 

0 0 

~ 

IUPT Station for lapse rates 

(between 1 and 

NUSTA) 

2 2 

ZUPT Depth through which 

lapse rate is 

calculated 

200 200 

IDIOPT3 Domain averaged 

wind component 

switch 

0 0 

IUPWND Upper air station for 

domain winds 

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ZUPWND Bottom and top of 

layer through which 

the domain scale 

winds are computed 

1.,1000. 1.,1000. 

IDIOPT4 Observed surface 

wind component 

switch 

0 0 

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Value Included in 

CENRAP Protocol 

Value Trinity 

Will Use Notes 

IDJOPT5 Observed aloft wind 

component switch 

0 0 

LLBREZE Use lake breeze 

module? 

F F 

NBOX Number oflake 

breeze regions 

0 0 

NLB r;umb~' of,totio", in 

e region 

0 0 

METBXID(NLB) Station IDs in the 

region 

0 0 

CONSTB Neutral stability 

mixing height 

coefficient 

1.41 1.41 

CONSTE Convective stability 

mixing height 

coefficient 

0.15 0.15 

CONSTN Stable stability 

mixing height 

coefficient 

2400 2400 

CONSTW Overwater mixing 

height coefficient 

0.16 0.16 

FCORIOL Absolute value of 

Coriolis parameter 

1.E-4 1.E-4 

IAVEZI Conduct spatial 

averaging? (1 = yes) 

1 1 

MNMDAV Max search radius in 

averaging process 

(number of grid cells) 

10 10 

HAFANG Half-angle of upwind 

looking cone for 

averaging (degrees) 

30 30 

ILEVZI Layers ofwind use in 

upwind averaging 

(between 1 and NZ) 

1 1 

DPTMIN Minimum potential 

temperature lapse rate 

in the stable layer 

above the current 

convective mixing 

height 

0.001 0.001 

DZZI Depth of layer above 

current convective 

mixing height 

200 200 

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CALMET Variable Description CENRAP Protocol 

through which lapse 

rate is computed (m) 

ZIMlN Minimum overland 50 

mixing height (m) 

ZIMAX Maximum overland 3000 

mixing height (m) 

ZIMlNW Minimum overwater 50 

mixing height (m) 

ZIMAXW Maximum overwater 3000 

missing height (m) 

ITPROG 3D temperature from 2 

observations or from 

MM5? 

IRAD Type of interpolation 1 

(l lIr) 

TRADKM Temperature 36 

interpolation radius 

of influence (km) 

NUMTS Max number of 5 

stations for 

temperature 

IAVET Spatially average 1 

temperature? (1 == 

yes) 

TGDEFB Temperature gradient -.0098 

below the mixing 

height over water 

(KIm) 

TGDEFA Temperature gradient -.0045 

above the mixing 

height over water 

(KIm) 

JWATl Beginning land use 55 

categories over water 

JWAT2 Ending land use 55 

categories for water 

NFLAGP Precipitation 2 

interpolation flag (2 

l/r2) 

SIGMAP Radius of influence 50 

Value Trinity 

Will Use 

50 

3000 

50 

I 3000 

1 

1 

36 

5 

1 

-0.0098 

-0.0045 

55 

55 

2 

50 

Notes 

Used surface 

observations and 

precipitation data 

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Value Included i: I Value Trinity 

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for precipitation 

interpolation (km) 

CUTP Minimum 

precipitation rate cut 

off(mmlhr) 

0.01 0.01 

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4. CALPUFF I 

I Trinity conducted a three-year CALPUFF analysis. The CALPUFF model requires the input of 

meteorological data output by CALMET, source emissions data, receptor data, ozone and ammonia 

data, and model parameter settings. 

I 4.1 BART-ELIGIBLE SOURCES 

I 
 As an electricity generating station, the Horseshoe Lake station is considered BART-eligible. In 


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order to determine what specific units constitute the "BART-eligible" source, the construction dates 


ofthe each of the plant's units must be examined. A summary of those units that were "in existence" 


between the IS-year BART window (August 7, 1962-August 7, 1977) is provided below. 


TABLE 4-1. CONSTRUCTION DATE SUMMARY 

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Unit No. Name Construction Date 

HL7 Babcock & Wilcox 1963 

HL8 Combustion Engineering 1968 

I 4.2 SOURCE EMISSIONS DATA 

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Trinity included emissions of S02, H2S04, NO,,, and PMlO in the model. For source-specific 

analyses, CENRAP has suggested several sources of emission data in the following priority:l 

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A Continuous Emission Monitoring (CEM) data, for period 2001-03 

A CEM data for 2002 

A Actual 2002 emission rates in state emission inventories 

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A Emission factors from AP-42 source profiles 

A Permit allowable emissions, or 

A Potential to emit 

I The modeled emissions are based on the highest hourly emission rate (based on a 24-hour calendar 

day average) that occurred from 2001 to 2003 and were obtained from collected CEM data. A 

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detailed summary of emission rates and source data is included in Appendix A. Table 4-2 provides a 

brief summary of these emission rates. 

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 TABLE 4-2. MAxIMUM EMISSION RATES (24-HOlJRAVERAGE) 


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Ibslhr 

PMlO 

Ibslhr 

S02 

Ibslhr 

H2SO4 

Ibslhr 

HL7 566.45 4.94 68.01 0.244 

HL8 1256.87 5.30 1.76 0.017 

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4.2.1 PM10 EMISSIONS 

I PMIO emis~ions are not directly entered into the model but are instead speciated out into its smaller 

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constituents. The PMIO emissions from the boilers are speciated according to the Federal Land 

Managers' ;guidance to include the following:2 

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• Coarse particulate matter (PMc, considered PM2.5-lo) 

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 • Firie particulate matter (PMF' considered PM<2.s) 


• Sulfates (S04) I 

• Secondary organic aerosols (SOA) 

• Elqmental carbon (EC) I 

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(25%) and fine (75%). A summary ofspeciated PMIO emissions is presented in Table 4-3. Full 

details ofP~lo speciation can be found in Appendix A. 

TABLE 4-3. SPECIATED PMlO EMISSIONS I i 

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PM (coarse) 

Ibslhr 

PM (fine) 

Ibslhr 

S04 

Ibslhr 

SOA 

Ibslhr 

EC 

Ibslhr 

; HL7 

! HL8 

1.236 

1.325 

3.707 

3.974 

-­

-­ -­

-­ -­

-­

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4.2.2 STACK PARAMETERS 

I Table 4-4 plovides a summary of source exhaust parameters. 

TABLE 4-4. POINT SOURCE STACK PARAMETERS I 


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unit I 

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East (X) 

(meters) 

UTM 

North (y) 

(meters) 

Exit 

Velocity 

(!Us) 

Stack 

Height 

(feet) 

Stack 

Diameter 

(feet) 

Exit 

Temperature 

(Fahrenheit) 

HL7 665,078 3,930,971 42.08 189 16 296 

HL8 ! 665,051 3,931,063 31.82 186 ' 22 268 

The base el'evation of each of the units is 328 meters (1,076 feet) above MSL based upon visual 

inspection 9f USGS topographic maps. I f 4.3 RECEPTOR LOCATIONS 

I The Nationll Park Service (NPS) has electronic files for each Class I area available on their website 

containing the locations and elevations of discrete Class I area receptors. As the only Class I areas I 

within 300 km of Horseshoe Lake, the receptor files for Caney Creek Wilderness and Wichita I I 

Mountains :Wildlife Refuge were downloaded from the NPS website, converted into the LCC NAD27 

projection, :and incorporated into the CALPUFF model. Receptor locations for these Class I areas are 

shown in Figures 4-1 to 4-2. I FIGURE 4-1. CANEY CREEK WILDERNESS RECEPTOR LOCATIONS 

I Caney Creek Wildemess 

60 Receptors 

USFS Boundary Source: 

FS National Coverage 61e: 

• • • 

~~~aUi:~~N'"uP Augu.t 22,2003 

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FIGURE 4-2. WIcmTA MOUNTAINS WILDERNESS RECEPTOR LOCATIONS 

I WicMa Mountains Wilderness within WicMa Mountains NWR 

59 Receptors 


fWS Wilderness Boundary Source: 


Reg«m 2GIS 

I 500 Gold Awe" SW 

PO Box13D6 

Albuquerque, NM 87103 

fWS NWR Boundary Source: 

IIttp:11_Jws,go vl1l 010lr2 gislb ou nda ry ,lItml 

September 16,2003 

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4.4 BACKGROUND OZONE I Background ozone concentrations are required in order to model the photochemical conversion of 

S02 and N01{ to sulfates (S04) and nitrates (N03). CALPUFF can use either a single background 

I value representative of an area or hourly ozone data from one or more ozone monitoring stations. 

CENRAP recommends either developing background ozone estimates from ambient monitors located 

within the particular domain being modeled or developing background ozone estimates from 

I CENRAP's most recent CMAQ or CAMx simulation for the 2002 base year. Trinity used a very 

conservative value of 40 ppb (as recommended in CENRAP protocol Appendix) in lieu of the 

CENRAP recommendation. 

I 4.5 BACKGROUND AMMONIA 

I Background ammonia concentrations are required to model the formation of ammonium sulfates and 

ammonium nitrates. CENRAP recommends developing background ammonia estimates from 

CENRAP's most recentCMAQ or CAMx simulation for the 2002 base year. Since CMAQ/CAMx

I modeled and observed monthly averaged ammonia concentrations exhibit wide spatial variability, 

CENRAP recommends obtaining separate monthly-averaged ammonia concentrations from CMAQ 

or CAMx for the CENRAP north, central and south modeling domains, respectively. These would 

I then be used as input to CALPUFF, Since the data from CENRAP's CMAQ and CAMx simulations 

is not readily available, Trinity used a conservative monthly background concentration of 3 ppb. This 

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background concentration is the value included in CENRAP's protocol as a default background value 

for the CENRAP region. 

4.6 CALPUFF MODEL CONTROL PARAMETERS I Table 4-5 provides a listing ofthe CALPUFF parameters that Trinity used in OG&E's modeling 

analysis. In addition to the parameters used for OG&E's modeling, the table also lists CENRAP's I recommended parameters for comparison. In cases where a parameter is different than what 

CENRAP recommended, a short explanation as to the difference is provided. 

I TABLE 4-5. SUMMARY OF CALPUFF INPUTS 

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Variable Description CENRAP Protocol Value Trinity Used 

METRUN All model periods 0 0 

in met files will be 

run 

mYR Starting year 2001 Appropriate met year 

mMO Starting month 1 1 

mDY Starting day 1 1 

mHR Starting hour 1 1 

XBTZ Base time zone (6 6 6 

= CST) 

IRLG Length of run 8760 8760 

NSPEC Number of 10 10 

MESOPUFFII 

\ ' chemical species 

N8E Number of 8 6 

chemical species 

to be emitted 

ITEST Program is 2 2 -' executed after 

8ETUPphase 

MRESTART Do not read or 0 0 

~ 

write a restart file 

. lyat 0 0 

, 

METFM CALMET binary 1 1 

file 

ALMET.MET 

AVET 60 60 

minutes 

PGTIME PG Averaging 60 60 

Notes 

Y 2001, 2002, 

2003 

802, 804, NOx, 

PMC,PMF 

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Variable . tion CENRAP Protocol 

mutes 

MGAUSS Gaussian 1 

distribution used 

in near field 

MCTADJ Partial plume path 3 

terrain adiustment 

MCTSG Sub-grid-scale 0 

complex terrain 

not modeled 

MSLUG Near-field puffs 0 

not modeled as 

elongated 

MTRANS Transitional plume 1 

rise modeled 

MTlP Stack tip 1 

downwash used 

MSHEAR (0, 1) Vertical 0 

wind shear (not 

modeled, 

modeled) 

MSPLIT Puffs are not split 0 

MCHEM MESOPUFFll 1 

chemical 

parameterization 

scheme 

MAQCHEM Aqueous phase 0 

transformation not 

modeled 

MWET Wet removal 1 

modeled 

MDRY Dry deposition 1 

modeled 

MDISP PG dispersion 3 

coefficients 

MTURBVW Use both cry and 3 

crw from 

PROFILE.DAT to 

compute cry and crz 

(n/a) 

MDISP2 PG dispersion 3 

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3 

0 

0 

1 

1 

0 

1 

1 

0 

1 

1 

3 

3 

3 

Value Trinity Used Notes 

Allowed for puff 

splitting due to 

significant sourcereceptor distances 

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CALPUFF 

Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

coefficients 

MROUGH PG cry and crz not 

adjusted for 

roughness 

0 0 

MPARTL No partial plume 

penetration of 

elevated inversion 

1 1 

MTINV Strength of 

temperature 

inversion 

computed from 

default gradients 

0 0 

MPDF PDF not used for 

dispersion under 

convective 

conditions 

0 0 

MSGTIBL Sub-grid TIBL 

module not used 

for shoreline 

0 0 

MBCON Boundary 

concentration 

conditions not 

modeled 

0 0 

MFOG Do not configure 

for FOG model 

output 

0 0 

MREG Technical options 

must conform to 

USEPALong 

Range Transport 

(LRT) guidance 

1 1 

CSPEC CENRAP OG&E Horseshoe Lake 

Output 

Group 

Species Modeled Emitted 

Dry 

Deposition 

Output 

Group 

Species Modeled Emitted 

Dry 

Deposition 

S02 1 1 1 S02 1 1 1 

S04 1 0 2 S04 1 1 2 

NOX 1 1 1 NOX 1 1 1 

HN03 1 0 1 HN03 1 0 1 

N03 1 0 2 N03 1 0 2 

NH3 1 1 1 NH3 1 0 1 

PMC 1 1 2 PMC 1 1 2 

PMF 1 1 2 PMF 1 1 2 

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Variable Description CENRAP Protocol 

EC 1 1 1 12 

SOA I 1 1 12 

PMAP Map projection UTM 

NX Number ofX grid 66 

cells in 

meteorological 

grid 

NY Number ofY grid 66 

cells in 

meteorological 

grid 

NZ Number of vertical 10 

layers in 

meteorological 

grid 

DGRIDKM Grid spacing (km) 6 

ZFACE Cell face heights 0,20,40,80, 160, 

in meteorological 320,640,1200,2000, 

grid (m) 3000,4000 

XORIGKM Reference X 5 

coordinate for SW 

corner of grid cell 

ofmeteorological 

I grid (lan) 

YORIGKM Reference Y 3327 

coordinate for SW 

corner of grid cell 

ofmeteorological 

grid (lan) 

IUTMZN UTMzoneof 12 

coordinates 

(NAD83) (use 

only if 

PMAP=UTM) 

IBCOMP X index oflower . 1 

left corner ofthe 

computational grid 

JBCOMP Y index of lower 1 

left corner ofthe 

computational 

grids 

IECOMP X index of upper 66 

right corner ofthe 

Value Trinity Used 

EC 1 

SOA I 

LCC 

256 

155 

10 

3.0 

0, 20, 40, 80, 160, 

320,640, 1200, 

2000,3000,4000 

0 

0 

14 

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1 

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Notes 

0 12 

0 12 

Based on refined grid 

parameters as 

specified in 

CALMETruns 

Based on refined grid 

parameters as 

specified in 

CALMETruns 

grid size 

Appropriate for 

domain (refined grid) 

Appropriate for 

domain (refined grid) 

N/A;LCC 

coordinates used 

Appropriate for 

domain (refined grid) 

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CALPUFF 

Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

computational grid 

JECOMP Y index of upper 

right corner ofthe 

computational grid 

66 155 Appropriate for 

domain (refined grid) 

LSAMP Sampling grid is 

not used 

F F 

mSAMP X index of lower 

left corner of 

sampling grid 

1 1 

mSAMP Y index of lower 

left corner of 

sampling grid 

1 1 

IESAMP X index of upper 

right corner of 

I sampling grid 

66 256 Appropriate for 

domain (refined grid) 

JESAMP Y index of upper 

right corner of 

sampling grid 

66 155 Appropriate for 

domain (refined grid) 

MESHDN Nesting factor of 

sampling grid 

1 1 

ICON Output file 

CONC.DAT 

containing 

concentrations is 

created 

1 1 

IDRY Output file 

DFLX.DAT 

containing dry 

fluxes is created 

1 1 

IWET Output file 

WFLX.DAT 

containing wet 

fluxes is created 

1 1 

IVIS Output file 

containing relative 

humidity data is 

created 

1 1 

LCOMPRS Perform data 

compression in 

output file 

T T 

IMFLX Do not calculate 

mass fluzes across 

specific 

0 0 

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Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

boundaries 

IMBAL Mass balances for 

each species not 

reported hourly 

0 0 

ICPRT Print concentration 

fields to output list 

file 

1 1 

IDPRT Do not print dry 

flux fields to 

output list file 

0 0 

IWPRT Do not print wet 

flux fields to 

output list file 

0 0 

ICFRQ Concentration 

fields are printed 

to output list file 

every hour 

1 1 

IDFRQ Dry flux fields are 

printed to output 

list file every 1 

hour 

1 1 

IWFRQ Wet flux fields are 

printed to output 

list file every 1 

hour 

1 1 

IPTRU Units for line 

printer output are 

in glm3 for 

concentration and 

glm2/s for 

deposition 

3 3 

!MESa Messages tracking 

the progress of run 

written to screen 

2 2 

LDEBUa Logical value for 

debug output 

F F 

IPFDEB First puff to track 1 1 

NPFDEB Number of puffs 

to track 

1 1 

NNl Meteorological 

period to start 

o~ut 

M 

1 1 

NN2 10 

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CALPUFF 

Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

period to end 

output 

NHILL Number ofterrain 

features 

0 0 

NCTREC Number ofspecial 

complex terrain 

receptors 

0 0 

MHILL Input terrain and 

receptor data for 

CTSG hills input 

in CTDM format 

2 2 

XHlLL2M Conversion factor 

for changing 

horizontal 

dimensions to 

meters 

1 1 

ZHlLL2M Conversion factor 

for changing 

vertical 

dimensions to 

meters 

1 1 

XCTDMKM X origin ofCTDM 

system relative to 

CALPUFF 

coordinate system 

(km) 

0 0 

YCTDMKM Y origin ofCIDM 

system relative to 

CALPUFF 

coordinate system 

(km) 

0 0 

S02 Diffusivity 0.1509 0.1509 

Alpha star 1000 1000 

Reactivity 8 8 

Mesophyll 

resistance 

0 0 

Henry's Law 

coefficient 

0.04 0.04 

NOX Diffusivity 0.1656 0.1656 

Alpha star 1 1 

Reactivity 8 8 

Mesophyll 

resistance 

5 5 

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Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

Heruy'sLaw 

coefficient 

3.5 3.5 

HN03 Diffusivity 0.1628 0.1628 

Alpha star 1 1 

Reactivity 18 18 

MesophyU 

resistance 

0 0 

Henry's Law 

coefficient 

8.e-8 8.e-8 

S04-2 Geomatric mass 

mean diameter of 

S04-2 (j.l.m) 

0.48 0.48 

N03­ Geometric mass 

mean diameter of 

N03- (I!m) 

0.48 0.48 

PMC Geometric mass 

mean diameter of 

PMC(f.l.m) 

6 6 

PMF Geometric mass 

mean diameter of 

PMF (11m) 

0.48 0.48 

EC Geometric mass 

mean diameter of 

EC (11m) 

0.48 0.48 

SOA Geometric mass 

mean diameter of 

SOA (Ilm) 

0.48 0.48 

RCUTR Reference cuticle 

resistance (s/cm) 

30 30 

RGR Reference ground 

resistance (s/cm) 

10 10 

REACTR Reference 

. ity 

8 8 

NINT Number of particle 

size intervals for 

effective particle 

deposition velocity 

9 9 

IYEG Vegetation in nonirregated areas is 

active and 

unstressed 

1 1 

S02 Scavenging 

coefficient for 

3.21E-05 3.21E-05 

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Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

liquid precipitation 

(S-I) 

Scavenging 

coefficient for 

frozen 

precipitation (S-I) 

0 0 

S04-2 Scavenging 

coefficient for 

liquid precipitation 

(S-I) 

1.OE-04 1.OE-04 

Scavenging 

coefficient for 

frozen 

precipitation (S·I) 

3.0E-05 3.0E-05 

HN03 Scavenging 

coefficient for 

liquid precipitation 

(S-I) 

6.0E-05 6.0E-05 

Scavenging 

coefficient for 

frozen 

precipitation (S·I) 

0 0 

N03­ Scavenging 

coefficient for 

liquid precipitation 

(S-I) 

l.OE-04 1.OE-04 

Scavenging 

coefficient for 

frozen 

precipitation (S-I) 

3.0E-05 3.0E-05 

NH3 Scavenging 

coefficient for 

liquid precipitation 

(S-I) 

8.0E-05 NA 

Scavenging 

coefficient for 

frozen 

precipitation (S-I) 

0 NA 

PMC Scavenging 

coefficient for 

liquid precipitation 

(S-I) 

1.OE-4 1.OE-4 

Scavenging 3.0E-05 3.0E-05 

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Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

coefficient for 

frozen 

precipitation (S·l) 

PMF Scavenging 

coefficient for 

liquid precipitation 

(S·l) 

1.OE-05 1.OE-05 

Scavenging 

coefficient for 

frozen 

precipitation (S·l) 

3.0E-05 3.0E-05 

EC Scavenging 

coefficient for 

liquid precipitation 

(S·l) 

1.0E-04 1.OE-04 

Scavenging 

coefficient for 

frozen 

precipitation (S·l) 

3.0E-05 3.0E-05 

OC Scavenging 

coefficient for 

liquid precipitation 

(S·l) 

1.OE-04 1.0E-04 

Scavenging 

coefficient for 

frozen 

precipitation (S·l) 

3.0E-05 3.0E-05 

MOZ Read ozone 

background 

concentrations 

from ozone.dat file 

(measured values) 

1 1 

BCK03 Background ozone 

concentration 

(ppb) 

12*40 12*40 

BCKNH3 Background 

ammonia 

concentration 

(ppb) 

12*3 12*3 

RNITEI Nighttime S02 

loss rate is %/hour 

0.2 0.2 

RNITE2 Nighttime NOX 

loss rate is %/hour 

2 2 

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CALPUFF 

Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

RNITE3 Nighttime HN03 

loss rate is %lhour 

2 2 

MH202 Background H202 

concentrations 

1 ° Need to choose 

°in 

order to use monthly 

background value 

BCKH202 Background 

monthly H202 

concentrations 

1 12*1 

BCKPMF Fine particulate 

concentration for 

SOA option 

(llg/m

3

) 

1 1 

OFRAC Organic fraction of 

fine particulate for 

SOA option 

.2 0.15,0.15,0.2,0.2,0.2, 

0.2,0.2,0.2,0.2,0.2, 

0.2,0.15 

Irrelevant, since 

MCHEM not equal to 

4 

VCNX VOCINOX ratio 

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50 50 

SYDEP Horizontal size of 

a puffin meters 

beyond which the 

time dependant 

dispersion 

equation ofHeffter 

is used 

550 550 

MHFTSZ Do not use Heffter 

formulas for sigma 

z 

° ° 

JSUP Stability class used 

to determine 

dispersion rates for 

puffs above 

boundary layer 

5 5 

CONK 1 Vertical dispersion 

constant for stable 

conditions 

0.01 0.01 

CONK2 Vertical dispersion 

constant for 

neutral/stable 

conditions 

0.1 0.1 

TBD Use ISC transition 

point for 

determining the 

transition point 

0.5 0.5 

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c;] Value Included in 

cription CENRAP Protocol 

between the 

Schulman-Scire to 

Huber-Snyder 

Building 

Downwash 

scheme 

IURBI Lower range of 10 

land use categories 

for which urban 

dispersion is 

assumed 

IURB2 Upper range of 19 

land use categories 

for which urban 

dispersion is 

assumed 

ILANDUIN Land use category * 

for modeling 

domain 

XLAIIN Leaf area index for * 

modeling domain 

ZOIN Roughness length * 

in meters for 

modeling domain 

ELEVIN Elevation above * sea level 

XLATIN North latitude of 

- station in degrees 

XLONIN South latitude of 

- station in degrees 

ANEMHT Anemometer 10 

height in meters 

ISIGMAV Sigma-v is read 1 

for lateral 

turbulence data 

IMIXCTDM Predicted mixing 0 

heights are used 

XMXLEN Maximum length 1 

of emitted slug in 

meteorological 

grid units 

XSAMLEN Maximum travel 10 

distance ofslug or 

Value Trinity Used 

10 

19 

* 

* 

* 

* --

10 

1 

0 

1 

10 

Notes 

, 

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CALPUFF 

Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

puffin 

meteorological 

grid units during 

one sampling unit 

MXNEW Maximum number 

of puffs or slugs 

released from one 

source during one 

time step 

60 60 

MXSAM Maximum number 

of sampling steps 

during one time 

step for a puff or 

slug 

60 60 

NCOUNT Number of 

iterations used 

when computing 

the transport wind 

for a sampling step 

that includes 

transitional plume 

rise 

2 2 

SYMIN Minimum sigma y 

in meters for a 

new puff or slug 

1 1 

SZMIN Minimum sigma z 

in meters for a 

new puff or slug 

1 1 

SVMIN Minimum lateral 

turbulence 

velocities (m/s) 

0.5 0.5 

SWMIN Minimum vertical 

turbulence 

velocities (m/s) 

0.20,0.12,0.08,0.06, 

0.03,0.016 

0.20,0.12,0.08, 

0.06,0.03,0.016 

WSCALM Minimum noncalm wind speeds 

(m/s) 

0.5 0.5 

XMAXZI Maximum mixing 

height (m) 

3000 3000 

XMINZI Minimum mixing 

height (m) 

20 20 

SL2PF Maxmium cry/puff 

length 

10 10 

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CALPUFF 

Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

PLXO Wind speed 

power-law 

exponents 

0.07,0.07,0.10,0.15, 

0.35,0.55 

0.07,0.07,0.10, 

0.15,0.35,0.55 

WSCAT Upper bounds of 

l,t 5 wind speed 

classes 

1.54,3.09,5.14,8.23, 

10.80 

1.54,3.09,5.14, 

8.23,10.80 

PGGO Potential temp 

gradients PG E & 

F (deglkm) 

0.020, 0.035 0.020, 0.035 

CDIV Divergence 

criterion for dw/dz 

(lIs) 

0.01 0.01 

PPC 

NsPiXI 

Plume path 

coefficients (only 

ifMCTADJ 3) 

0.5,0.5,0.5,0.5, 

0.35,0.35 

0.5, 0.5, 0.5, 0.5, 

0.35,0.35 

Number ofpuffs 

when split 

3 3 

IRESPLIT Hours when puff 

is eligible to split 

1900 Hour 17 Should be by hour of 

day -1900 is hour 17 

ZISPLIT Previous hours 

minimum mixing 

height, m 

100 100 

ROLDMAX Previous max 

mixing 

height/current 

height ratio, must 

be less than this 

value to allow puff 

to split 

0.25 0.25 

NSPLITH Number ofpuffs 

resulting from a 

split 

5 5 

SYSPLITH Minimum sigma-y 

of puff before it 

may split 

1.0 1.0 

SHSPLITH Minimum puff 

elongation rate 

from wind shear 

before puff may 

split 

2.0 2.0 

CNSPLITH Minimum species 

concentration 

before a pluff may 

1.0E-07 1.0E-07 

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CALPUFF 

Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

split 

EPSSLUG Criterion for 

SLUG sampling 

1.OE-04 1.OE-04 

EPSAREA Criterion for area 

source integration 

1.0E-06 1.OE-06 

DSRISE Trajectory step 

length for 

numerical site 

algorithm 

1.0 1.0 

NPTl Number ofpoint 

sources with 

constant stack 

parameters or 

variable emission 

rate scale factors 

Varies by scenario 2 Appropriate for 

OG&E 

!PTU Units for point 

source emission 

rates are gls 

1 3 Used different units 

(3 lb/hr) 

NSPTl Number of sourcespecies 

combinations with 

variable emissions 

scaling factors 

-

-

NPT2 Number of point 

sources with 

variable emission 

parameters 

provided in 

external file 

--

MISC Other point source 

inputs include 

stack height, stack 

diameter, exit 

temperature, exit 

velocity, 

downwash flag 

and emissions by 

species 

-

-

NARI Number of 

polygon area 

sources 

Varies by scenario 0 None modeled 

IARU Units for area 

source emission 

1 1 

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CALPUFF 

Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

rates are g/m2/s 

NSARI Number of source 

species 

combinations with 

variable emissions 

scaling factors 

--

NAR2 Number of 

buoyant polygon 

area sources with 

variable location 

and emission 

parameters 

-

-

NLN2 Number of 

buoyant line 

sources with 

variable location 

and emission 

parameters 

- 0 None modeled 

NLINES Number of 

buoyant line 

sources 

-

-

ILNU Units for line 

source emission 

rates in gls 

-

-

NSLNI Number of sourcespecies 

combinations with 

variable emissions 

scaling factors . 

-

-

MXNSEG Maximum number 

of segments used 

to model each line 

-

-

NLRISE Number of 

distance at which 

transitional rise is 

computed 

-

-

XL Average line 

source length (m) 

-

-

HBL Average height of 

line source height 

(m) 

-

-

WBL Average building 

width (m) 

-

-

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Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

WML Average line 

source width (m) 

- -

DXL Average 

separation 

between buildings 

(m) 

- -

FPRIMEL Average buoyancy 

parameter (m4/s3) 

- -

NVLl Number ofvolume 

sources 

- 0 None modeled 

IVLU Units for volume 

source emission 

rates in 

grams/second 

- - -

NSVLl Number of sourcespecies 

combinations with 

variable emissions 

scaling factors 

- -

IGRDVL Gridded volume 

source data is not 

used 

- -

VEFFHT Effective height of 

emissions (m) 

- -

VSIGYI Initial sigma-y 

value 

- -

VSIGZI Initial sigma-z 

value 

- -

NREC Number of nongridded receptors 5630 291 Receptor data 

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I 5. CALPOST 

I Trinity conducted a three-year CALPOST analysis to determine the change in light extinction caused 

by OG&E's BART-eligible sources when compared to a natural background. The CAL POST model 

requires the input of concentration data output by CAL PUFF . 

I 5.1 LIGHT EXTINCTION ALGORITHM 

I Trinity utilized EPA's currently approved algorithm for reconstructing light extinction (as opposed to 

the new equation for reconstructing light extinction recommended by the IMPROVE Steering 

Committee). The light extinction equation is provided below. 

I = 3*f(RH)*[(NH4)2S04] + 3*f(RH)*[NH4N03] + 4*[OC] + 1*[PMf b ] ext 

+ O.6*[PMc] + lO*[EC] + bRay

I The algorithm was used to calculate the daily light extinction attributable to the Horseshoe Lake 

Station's BART-eligible sources and light extinction attributable to a natural background. The I change in deciviews based on the source and background light extinctions was evaluated using the 

equation below. 

I 11 dv = 10 *In bext, backgroWld + bext. source 1 

[ bext, backgroWld 

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5.2· CALPOST PROCESSING METHOD 

I Trinity used CALPOST Method 6, which calculates hourly light extinction impacts for the source and 

background using monthly average relative humidity adjustment factors. Trinity used monthly Class 

I area-specific relative humidity adjustment factors based on the centroid of the Class I area as I included in Table A-3 of EPA's Guidance/or Estimating Natural Visibility Conditions Under the 

Regional Haze Program. The factors for the relevant Class I areas in the analysis are provided in 

Table 5-1. 

I TABLE 5-1. MONTHLY HUMIDITY FACTORS 

Class I Area Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 

Caney Creek 3.4 3.1 2.9 3.0 3.6 3.6 3.4 3.4 3.6 3.5 3.4 3.5 

Wichita Mountains 2.7 2.6 2.4 2.4 3.0 2.7 2.3 2.5 2.9 2.6 2.7 2.8 

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5.3 NATURAL BACKGROUND 

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I Trinity used default west natural background values for the Wichita Mountains and default east 

natural background values for Caney Creek. 3 The annual average concentrations are included in 

Table 2-1 ofEPA's Guidance/or Estimating Natural Visibility Conditions Under the Regional Haze 

Program and are provided in Table 5-2. 

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TABLE 5-2. DEFAULT AVERAGE ANNUAL NATURAL BACKGROUND LEVELS 

Component 

Average Annual 

Natural Background 

West (!lglm3 

) 

Average Annual 

Natural Background 

East (!lglm3 

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Ammonium Sulfate 0.12 0.23 

Ammonium Nitrate 0.10 0.10 

Organic Carbon Mass 0.47 1.40 

Elemental Carbon 0.02 0.02 

Soil 0.50 0.50 

Coarse Mass 3.0 3.0 

I 5.4 EVALUATING BART-EXEMPTION 

Trinity compared the high of the 2001 through 2003 daily ildv values output by CALPOST to a 

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I contribution threshold of 0.5 ildv. If the 98th percentile ildv values (the 7th highest value, 22nd highest 

over three years) output by CALPOST is less 0.5 ildv, then the source is exempt from BART 

requirements. If the highest ofthe ildv values output by CALPOST is greater than 0.5 ildv, then the 

source is considered subject to BART regulations and must start on a BART-determination process. 

I 5.5 SUMMARY OF CALPOST CONTROL PARAMETERS 

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Table 5-3 provides a listing of the CALPOST parameters that Trinity used in OG&E's modeling 

analysis. In addition to the parameters used for OG&E's modeling, the table also lists CENRAP's 

recommended parameters for comparison. In cases where a parameter to be used is different than 

what CENRAP recommended, a short explanation as to the difference is provided. 

I TABLE 5-3. SUMMARY OF CALPOST INpUTS 

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CALPOST 

Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

ISYR Starting year 2001 Appropriate met 

year 

Years 2001, 2002, 

2003 

ISMO Starting month I 1 

ISDY Starting day 1 1 

I 3 Based on comments received from EPA Region 7 to Trinity Consultants' Kansas City office, May 22, 2006. 

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CALP Value Included in 

Varia Description CENRAP Protocol 

ISHR Starting hour 0 

NPER Number of periods to 8760 

process 

NREP Process every hour of 1 

data? 1 = yes 

ASPEC Process species for VI SIB 

visibility 

ILAYER Layer/deposition code; 1 

1 for CALPUFF 

concentrations 

A Scaling factor, slope 0 

B Scaling factor, 0 

intercept 

LBACK Add hourly F 

background 

concentrations of 

fluxes? 

LG Process gridded F 

receptors? 

LD Process discrete T 

receptors? 

LCT Process complex F 

terrain receptors? 

LDRING Report receptor ring F 

results? 

NDRECP Select all discrete ·1 

receptors 

IBGRID X index ofLL comer ·1 

ofreceptor grid 

JBGRID Y index ofLL comer ·1 

of 

IEGRID Xi ·1 

ofre 

JEGRID Y index ofUR corner ·1 

ofreceptor grid 

NGONOFF Number ofgridded 0 

receptor rows 

NGXRECP Exclude specific 0 

gridded receptors, Yes 

=0 

Value Trini 

0 

8760 

1 

VI SIB 

1 

0 

0 

F 

F 

T 

F 

F 

Varies 

·1 

·1 

·1 

·1 

0 

0 

Notes 

All CALPUFF 

periods will be 

included 

As appropriate for 

Class I area being 

analyzed 

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CALPOST 

Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

RHMAX Maximum RH% used 

in particle growth 

curve 

95 95 

LVS04 Compute light 

extinction for sulfate? 

T T 

LVN03 Compute light 

extinction for nitrate? 

T T 

LVOC Compute light 

extinction for organic 

carbon? 

T T 

LVMPC Compute light 

extinction for coarse 

particles? 

T T 

LVMPF Compute light 

extinction for fine 

particles? 

T T 

LVEC Compute light 

extinction for 

elemental carbon? 

T T 

LVBK Include background in 

extinction calculation? 

T T 

SPECPMC Coarse particulate 

species 

PMC PMC 

SPECPMF Fine particulate 

species 

PMlO PMF Notation difference 

EEPMC Extinction efficiency 

for coarse particulates 

0.6 0.6 

EEPMF Extinction efficiency 

for fine particles? 

1.0 1.0 

EEPMCBCK Extinction efficiency 

for coarse part. 

Background 

0.6 0.6 

EES04 Extinction efficiency 

for ammonium sulfate 

3.0 3.0 

EEN03 Extinction efficiency 

for ammonium nitrate 

3.0 3.0 

EEOC Extinction efficiency 

for organic carbon 

4.0 4.0 

EESOIL Extinction efficiency 

for soil 

1.0 1.0 

EEEC Extinction efficiency 

for elemental carbon 

10.0 10.0 

I' 5-4 Oklahoma Gas & Electric Co. Trinity Consultants 

Refined BART Modeling Report (Horseshoe Lake) 063701.0003 

'I 

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CALPOST Value Included in 

Variable Description CENRAP Protocol Value Trinity Used Notes 

MVISBK Method 6 for 6 6 

background light 

extinction 

BEXTBTBK Background extinction 12 Not Used Not necessary since 

forMVISBK=1 MVISBK=6 

RHFRAC % ofparticles affected 10 Not Used Not necessary since 

byRH MVISBK=6 

RHFAC Extinction coefficients Depends on Class I For Caney Creek: As appropriate for 

for modeled and Area 3.4,3.1,2.9,3.0, Class I area 

background 3.6, 3.6, 3.4, 3.4, 

hygroscopic species 3.6, 3.5, 3.4, 3.5 

computed using EPA Wichita Mountains: 

(2003) monthly RH 2.7,2.6,2.4,2.4, 

adjustment factors 3.0, 2.7, 2.3, 2.5, 

2.9,2.6,2.7,2.8 

BKS04 d sulfate 0.23 0.23 Used for Caney 

coeff-east Creek 

BKN03 Background nitrate 0.10 0.10 Used for Caney 

extinction coeff - east Creek 

BKPMC Background sulfate 3.00 3.00 Used for Caney 

extinction coeff - east Creek 

BKSOC Background organic 1.40 1.40 Used for Caney 

carbon extinction Creek 

coeff- east 

BKSSOIL Background soil 0.50 0.50 Used for Caney 

extinction coeff - east Creek 

BKSEC Background elemental 0.02 0.02 Used for Caney 

carbon extinction Creek 

coeff- east 

BKS04 Background sulfate 0.12 0.12 Used for Wichita 

extinction coeff - west Mountains 

BKN03 kground nitrate 0.10 0.10 Used for Wichita 

nction coeff - west Mountains 

BKPMC Background sulfate 3.00 3.00 Used for Wichita 

extinction coeff - west Mountains 

BKSOC Background organic 0.47 0.47 Used for Wichita 

carbon extinction Mountains 

coeff-west 

BKSSOIL Background soil 0.50 0.50 Used for Wichita 

extinction coeff - west Mountains 

BKSEC Background elemental 0.02 0.02 Used for Wichita 

carbon extinction Mountains 

coeff-west 

5-5 Oklahoma Gas & Electric Co. Trinity Consultants 


Refined BART Modeling Report (Horseshoe Lake) 063701.0003 

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CALPOST 

Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

BEXTRAY Extinction due to 

Rayleigh scattering 

(l/Mm) 

10.0 10.0 

LDOC Print documentation 

image? 

F F 

IPTRU Print output units for 

concentrations and for 

deposition 

3 I Units preference 

LlHR Report 1 hr averaging 

times 

F F 

L3HR Report 3 hr averaging 

times 

F F 

L24HR Report 24 hr averaging 

times 

T T 

LRUNL Report run-length 

averaging times 

F F 

LT50 Top 50 table F F 

LTOPN Top Ntable F F 

NTOP Number ofTop-N 

values at each receptor 

4 4 

ITOP Ranks of Top-N 

values at each receptor 

1,2,3,4 1,2,3,4 

LEXCD Threshold 

exceedances counts 

F F 

TIIRESH1 Averaging time 

threshold for 1 hr 

averages 

-1 -1 

TIIRESH3 Averaging time 

threshold for 3 hr 

averages 

-1 -1 

TIIRESH24 Averaging time 

threshold for 24 hr 

averages 

-1 -1 

TIIRESHN Averaging time 

threshold for NA VGhr averages 

-1 -1 

NDAY Accumulation period, 

days 

0 0 

NCOUNT Number of 

exceedances allowed 

1 1 

LECHO Echo option F F 

LTIME Time series option F F 

LPLT Plot file option F F 

5-6 Oklahoma Gas & Electric Co. Trinity Consultants 

Refined BART Modeling Report (Horseshoe Lake) 063701.0003 

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CALPOST 

Variable Description 

Value Included in 

CENRAP Protocol Value Trinity Used Notes 

LGRD Use grid format 

instead of DATA 

format 

F F 

LDEBUG Output information for 

debugging? 

F F 

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 Oklahoma Gas & Electric Co. Trinity Consultants 

Refined BART Modeling Report (Horseshoe Lake) 063701.0003 

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I 6. MODEL RESULTS 

I A summary ofthe top 25 visibility-impairing days at each ofthe relevant Class I areas over the 

modeled 2001-03 period is summarized in Table 6-1 and 6-2 below. Shaded values indicate 

I 

visibility impacts that exceed the 0.5 L1dv threshold for contribution to visibility impairment. As seen 

in these tables, the 98th percentile values indicate that the Horseshoe Lake Station's contribution to 

visibility impairment is below the 0.5 dv threshold at each of the neighboring Class I areas. These 

results indicate that the Horseshoe Lake Station therefore qualifies for exemption from BART. 

I TABLE 6-1. VISIBLITY IMPACT MODEL RESULTS FROM CANEY CREEK 2001-03 

Background Extinction by Species (%) Year Day 

Visibility 

Impact (Adv) 

Rank Modeled 

S04 NOs OC EC PMC PMF 

Peak 24-hr Average 0.429 0.88 98.96 0 0 0.02 0.14 2001 ._.£B..L 

2 0.96 98.91 0 0 0.01 0,11 2001 4 

3 

0.326 

2003 .. 295__ 

4 

0.254 3.59 96.23 0 0 0.01 0.18 

2002 12 

5 

0.241 0.97 98.91 0 0 0.01 0.11

0.217 1.66 98.25 0 0 0 0.09 2002 58 

6 0.202 0.89 99 0 0 0.Q1 0.1 2001 ~.!!~-

I 7 0.197 0.79 99.09 0 0 0.01 0.11 2002 3§L 

8 0.194 2.05 97.83 0 0 0 0.12 2002 .......?~.? ..­

I 

2003 __35L 

10 

9 0.194 0.33 99.64 0 0 0 0.03 

0.138 1.16 98.67 0 0 0.01 0.16 2002 ....iL 

11 2002 360 

12 

0.133 1.89 98.03 0 0 0 0.08 

I 

2001 22 

13 

0.105 2.93 96.97 0 0 0.01 0.09

2.24 97.64 0 0 0.01 0.12 2001 24 _. 

14 

0.104 

0.101 0.97 98.92 0 0 0 0.11 2002 354

15 0.101 2.79 97.05 0 0 0 0.16 2003 .....liL 

I 16 0.09 1.77 98.14 0 0 0 0.08 2002 ..__Ell_

17 0.09 1.17 98.71 0 0 0 0.11 2003 ...!!l_.._ 

18 2003 153__ 

19 

0.089 7.39 92.42 0 0 0.01 0.18

2002 353 

20 

0.088 0.65 99.22 0 0 0.01 0.12 

0.088 2.59 97.27 0 0 0 0.13 2003 __~2!L 

21 0.086 1.61 98.26 0 0 0.01 0.13 2001 ~£.._. 

98th Percentile 2.02 97.91 0 0 0.01 0.06 2001 347 

23 

0.085 

0.085 1.1 98.78 0 0 0 0.12 2003 363 - . . --..... ~~- .

24 2.02 97.88 0 0 0 0.1 2000 14 

25 

0.085 

0.082 0.86 99.13 0 0 0 0.01 2003 348

I 6-1 Oklahoma Gas & Electric Co. Trinity Consultants 

Refined BART Modeling Report (Horseshoe Lake) 063701.0003 

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 TABLE 6-2. VISIBLITY IMPACT MODEL RESULTS FROM WICHITA MOUNTAINS 2001-03 


Rank Modeled Background Extinction by Species (%) Year Day 

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 Oklahoma Gas & Electric Co. Trinity Consultants 


Refined BART Modeling Report (Horseshoe Lake) 063701.0003 

I 
ApPENDIX A - EMISSION DATA 

Oklahoma Gas & Electric Company Trinity Consultants 


Refined BART Modeling Report 063701.0003 

- - - - - - -, .. - - - .. 

- -,- ..

'- - ­

Printed 10/30/2006 

Source Emissions' Emission Data 

Location UnitID Constr. DateZ Primary Fuel NOx TotalPM1o SO~ H2SO4 

Horseshoe Lake 7 1963 Natural Gas 

IbS/hr 

566.45 

lbs/hr 

4.94 

Ibs/hr 

68.01 

IbS/hr 

2.44E-OI 

Horseshoe Lake 8 1968 Natural Gas 1,308.41 5.30 1.75 1.71E-02 

I Source emissions as provided by OG&E CEMS data extending from 111/2002 to 12/3112005 

2 Construction dates as listed in respective facility TV permits. Source parameters listed as provided by OG&1 

Source Emissions 

Location UnitID 

Horseshoe Lake 7 


Horseshoe Lake 8 


Model Input Data 

SOl S04 NOx PM (coarset PM (fine)4 EC SOA. 

(Ib/hr) 

68.01 2A4E-Ol 566.45 1.24 3.71 

1.75 1.7 I E-02 1,308.41 1.32 3.97 • 

4 Condensible/filterable PM speciation were based on the following profiles: 

For Natural Gas, National Park Service guidance for NG-fired combnstion turbines. http://www2.nature.nps.gov/airlPermits/ect/ectGasFiredCT.cfin 

25% PM (coarse) 

75% PM 

Stack parameters (English) 1 

Location UnitID Heat Duty Exit Velocity Stack Height Stack Diameter Stack Temp. Base Elev.s 

(MMBtulhr) ft/sec feet feet Fahrenheit (feet) 

Horseshoe Lake 7 511 42.08 189 16 296 1,076 

Horseshoe Lake 8 3,960 31.82 186 22 268 1,076 

Stack parameters (Metric) 

Location Unit ID Heat Duty Exit Velocity Stack Height Stack Diameter Stack Temp Base Elev. 

(MMBtu/hr) (m/s) (m) (m) Kelvin (meters) 

Horseshoe Lake 7 511 12.83 57.62 4.73 420 328 

Horseshoe Lake 8 3,960 9.70 56.71 6.71 404 328 

5 Base elevations obtained from visual inspection ofUSGS topographic map: 

QGE BART Modeling Page 1 of 1 Trinity Consultants 


Seminole, Horseshoe Lake, Sooner, Muskogee Model Input 063701.0003 

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ApPENDIX B - DATA FILE LIST I 

I LIST OF SURFACE STATIONS 

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Location 

Winfield/Ark. City. KS 

Bartlesville. OK 

CoffeYVille MunicioaL KS 

_",_kld..__ El DoraQ..QLQ.,?odwi.!h.AJL....___".... 

------

FayettevillelDrake. AR 

Hobart. OK 

HarrisonIBoone Co.. AR 

".._II",,,,,,,,,,_,,,,,,_,, Little RockfAdart]s. AR 

Little Rock AFB. AR 

McAlester RegionaL OK 

"___,_,,,_Mena InternationaJ...MY..I)... AR 

Station No. 

724502 

723565 

723604 

724519 

13986 

723526 

722589 

93992 

723535 

722673 

22222 

13964 

93993 

13975 

93986 

723415 

13971 

3923 

99999 

11111 

13963 

723405 

11112 

93950 

723435 

13967 

13969 

745431 

33333 

...,__...1'l)6L._..., 

_---.1.6.7§L...___ 

__.J.,4,..1~L____,. 

___ ..-llJ..QL._ 

...-l1&.c,}__ 

,,,_,_,,,.._.~;>.333 ___ 

,__.....J.llOO",,_._ 

,..__33.217""_""",,, 

36)]1""..",..",_ 

"'_)5.333____ 

36,OQlL",.."..." 

___...1Q..30Q...",_,,_ 

...____ l?.Jl9..Q__ 

__ J.~L46L_, 

__",36,)33 

_____14,J§1...,_"'___ 

...._"""J]03L.. 

,..",_,_",..1.4.,733 

,___,..).,4.91 L_", 

35,650 

.._..1,4~QQ,____,,_ 

.,.....14,..~2L___ 

"",_,....1.6.733 _"'''''' 

___J.J31L..,..,,, 

..97,033 

-96.017 

-100,283 

..95.567 

-95.483 

-97,183 

..92,817 

..97,917 

-96.667 

-98,983 

-94.367 

,,94.167 

-99.767 

-99.050 

-93.083 

-93,117 

-97.267 

-97.433 

-94,500 

-98417 

-100.950 

-92.233 

,,92.150 

-95.367 

-95.783 

..94,217 

-97.600 

..97.450 

-98.550 

-97,100 

-95.517 

-95.450 

Refined BART Modeling Report 063701.0003 

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 -

!K§!£L__JiJoaT!} Soring. AR 77777 3Q)83 -94.483 

I !K~rL__W_ich.i!a Falls.. TX 13966 3J~~1._...__.. -98.517 

I 

IK$.W£L.._ ...-1ilHLwater.OK_______. I I I 13 ...J.§J~_Q..•____.. -97.083 

l!UBt:L", •..."•....tgrt Leonard Wood. MQ.___ 724457 __._.}).759___ -92.150 

723540 ___•__1?4I 7 ~-"'---. Tinker AFB. OK -97.383

~J1(l McKinnev. TX 722541 4.ill_3__ 

Tulsa Int. Airoort. OK 13968 36.200 -95.883 

~ Texarkana RegionaL TX 13977 33.45Q.___ -94.000 I ~ 

KYBT Bentonville. AR 88888 36)50 -94.217 

KWQ!'L-__._ Enid/Woodrinl!. OK 44444 _361~1___ -97.783 

I KADM Ardmore Municioal. OK 723555 34.300 -97.017 

I LIST OF PRECIPITATION STATIONS 

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Cooperative Latitude Longitude 

station ID Location/name State (deg.) (deg.) 

30130 ALUM FORK AR 34.480 -92.510 

30178 ANTOINE AR 34.020 -93.250 

~Q220 ARKADELPHIA 2 N AR 34.090 -93.030 

30458 BATESVILLE LIVESTOCK AR 35.500 -91.460 

30530 BEEBE AR 35.040 -91.540 

30616 BERRYVILLE 5 NW AR 36.260 -93.370 

30764 BLAKELY MOUNTAIN DAM AR 34.340 -93.120 

30798 BLUE MOUNTAIN DAM AR 35.070 -93.390 

30832 BOONEVILLE 3 SSE AR 35.060 -93550 

30842 BOTKINBURG 3 NE AR 35.430 -92.280 

30900 BRIGGSVILLE AR 34560 -93.300 

31020 BULL SHOALS DAM AR 36.220 -92.340 

31140 - CALIONL&D AR 33.180 -92.290 

31152 CAMDEN I AR 33.360 -92.490 

31457 CLARKSVILLE 6 NE AR 35.320 -93.240 

31582 COMPTON AR 36.050 -93.180 

31952 DE QUEEN DAM AR 34.060 -94.220 

32020 DIERKS DAM AR 34.090 -94.050 

32148 DUMAS AR 33.530 -91.290 

32300 EL DORADO GOODWIN FD AR 33.130 -92.490 

~2356 EUREKA SPRINGS 3 WNW AR 36.250 -93.470 

~2444 FAYETTEVILLE EXP STN AR 36.060 ·94.100 

32489 FERNDALE6E AR 34.460 -92.270 

32544 FOREMAN AR 33.430 -94.230 

32574 FORT SMITH MU OK AR 35.200 -94.220 

I Oklahoma Gas & Electric Company Trinity Consultants 

Refined BART Modeling Report 063701.0003 

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2794 GILBERT AR 35.590 -92.430 

I 2810 GILLHAM AR 34.120 -94.150 

~297g GREERS FERRY DAM AR 35.310 -92.000 

~3132 HARDY AR 36.170 -91.280 I ~3165 HARRISON FAA AP AR 36.160 -93.090 

I 

~3S44 HUNTSVILLE 1 SSW AR 36.040 -93.4S0 

~4185 LEWISVILLE AR 33.220 -93.340 

34248 NORTH LITILE ROCKlMUNICIPAL AR 34.500 -92.160 

I 

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34756 MENA AR 34.340 -94.160 

34839 MILLWOOD DAM AR 33.410 -93.590 

34988 MOUNT IDA 3 SE AR 34.320 -93.350 

~5110 NARROWS DAM AR 34.090 -93.430 

~5112 NASHVILLE AR 33.560 -93.510 

35200 NIMROD DAM AR 34.570 -93.100 

35228 NORFORK DAM AR 36.150 -92.150 

I 35320 NORTH LITTLE ROCKlMUNICIPAL AR 34.500 -92.160 

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35602 PARTHENON AR 35.570 -93.150 

35754 PINEBLUFF AR 34.140 -92.010 

35908 PRESCOTT AR 33.480 -93.230 

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36393 STPAUL AR 35.490 -93.460 

36920 STUTTGART 9 ESE AR 34.280 -91.250 

E488 WALDRON AR 34.540 -94.060 

I 

141427 CHANUTE M JOHNSON AP KS 37.400 -95.290 

141699 COLBY 1 SW KS 39.240 -101.040 

142164 DODGE CITY MU, KS KS 37.460 -99.580 

142432 ELKHART KS 37.000 -101.530 

I 142980 GARDEN CITY EXP STN KS 38.000 ­

143954 INDEPENDENCE KS 37.140 ­ 143984 lOLA 1 W KS 37.550 -95.260 

I 145175 MEDICINE LODGE KS 37.170 __.:~~l~Q._ 

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147922 SUBLETTE KS 37.290 -100.500 


148830 WICHITAKS. KS 37.390 -97260 


30789 BOLIVAR MO 37.370 -93.230 


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232302 DORA MO 36.470 -92.140 


23431S JOPLIN MUNICIPAL AP MO 37.090 -94.300 


234544 KIRKSVILLE MO 40.120 -92.340 


'34825 LEBANON2W MO 37.410 -92.420 


34919 LICKING 4 N MO 37.330 -91.530 


235027 LOCKWOOD MO 37.230 -93.570 

35307 MARSHFIELD MO 37.200 -92.550 

I 35594 MILLER 1 E MO 37.130 -93.500 ..._...... 

~36460 OZARK BEACH MO 36.400 -93080 

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1237435 ST JOSEPH ROSECRANS MO 39.470 -94.550 

I 1237506 SALEM MO 37.380 -91.320 -

1237656 SENECA MO 36.510 -94.360 

1237967 SPRING CITY MO 36.590 -94.320 I 1237976 SPRINGFIELDIMUN. MO. MO 37.140 -93.230 

I 

1238082 STOCKTON DAM MO 37.420 -93.460 

1238252 TABLE ROCK DAM MO 36.360 -93.180 

1238880 WEST PLAINS MO 36.450 -91.500 

I 

340179 ALTUS IRIG RES STN OK 34.350 -99.200 

340292 ARDMORE OK 34.100 -97.080 

~40548 BARTLESVILLE PHILLIP OK 36.450 -96.000 

~40670 BENGAL OK 34.510 -95.050 

I ~40908 BOISE CITY 2 E OK 36.440 -102.290 

341437 CANEY OK 34.140 -96.130 

341750 CHICKASHA EXP STN OK 35.030 -97.550 

I 342654 DUNCAN AIRPORT OK 34.290 -97.580 

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342849 ELK CITY OK 35.230 -99.240 

343407 GAGE AIRPORT OK 36.180 -99.460 

343497 GEARY OK 35.380 -98.190 

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343740 GREAT SALT PLAINS OK 36.450 -98.080 

344204 HOBART MUNICIPAL AP OK 34.350 -99.020 

~~ZL LAKE OVERHOLSER OK 35.290 -97.400

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345108 LEHIGH OK 34.280 -96.130 

345589 MARSHALL OK 36.090 -97.370 

345664 MCALESTER MUNI AP OK 34.530 -95.470 

346130 MUSKOGEE OK 35.460 -95.200 

I 346485 NOWATA OK 36.420 -95.380 

346616 OILTON 2 SE OK 36.040 -96.340 

346638 OKEMAH OK 35.260 -96.180 

I 346661 OKLAHOMA CITY, OK OK 35.230 -97.360 

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346944 PAWNEE5N OK 36.240 -96.490 

347201 PONCA CITY MUNI AP OK 36.440 -97.060 

347412 RANGE OK 36.330 -101.050 

I 

347660 RIVERSIDE 4 W OK 36.470 -100.250 

348101 SHATTUCK 1 N OK 36.170 -99.530 

348501 STILLWATER 2 W OK 36.070 -97.060 

~48992 TULSAfINTL OK. OK 36.120 -95.530 

349404 WAYNOKA OK 36.320 -98.530 

~49629 WICHITA MTN WL REF OK 34.440 -98.430 

ABILENE MUN, TX TX 32.250 -99.410 

410211 AMARILLOIINTL. TX TX 35.130 -101.420 I 411698 CHILDRESS MUNI AP TX 34.260 -100.170 

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 ~11773 CLARKSVILLE 1 W TX 33.370 


I ~11921 COMMERCE TX ,/\ 


,/\ ">/\/\ ~11956 CONROE TX 

I 412244 

~12242 

~".

DALLAS 

DALLAS-FORT 

LOVE 

WORTHIFORT. 

FIELD 

TX. TX 

TX 32.510 

32.540 ·97.010

~ 412404 DENTON2SE TX 33.120 -97.060 

413284 FORT WORTH MEACHAM F TX 32.490 ,

I 413285 FORT WORTH WSFO TX 32.500 -97.180 

I 

413370 FRISCO TX 33.090 -96.490 

413691 GRAPEVINE DAM TX 32.570 -97.030 

414098 HEREFORD TX 34.490 -102.240 

414375 HUNT !OW TX 30.030 ·99.310 

I 414517 JACKSBORO TX 33.140 -98.090 

1151 93 LEXINGTON TX 30.250 -97.010 

415411 LUBBOCKJLUBBOCK INTL TX. TX 33.390 -101.490,,_ 

I 15897 MIDLOTHIAN 2 TX 32.290 -97.000 

I 

15958 MINERAL WELLS MUN AP TX 32.470 ·98.040 

16108 MOUNT PLEASANT TX 33.100 -95.000 

16177 NACOGDOCHES TX 31.370 -94.390 

I 

..,16776 PAMPA 2 TX 35.340 -100.580 

17074 PLAINS TX 33.110 ·102.500 

18623 STEPHENVILLE 1 N TX 32.150 ·98.120 .,,~-,,---

I ~18743 SULPHUR SPRINGS TX 33.090 -95.380 

~18942 TEXARKANA TX 33.250 -94.050 

~19532 WEATHERFORD TX 32.450 ·97.460 

~19729 WICHITA FALLS/SHEPS AFB TX TX 33.590 -98.300 

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- - - - - - - - - - - - - - - - - .. ­

List of USGS Terrain Files (1-deg format) 

I 

37 

36 

35 

34 

33 

Dodge City-E Pratt-W Pratt-E Wichita-W Wichita-E Joplin-W Joplin-E SpringfieLd-W Springfield-E Rolla-W 

Perryton-E Woodward-W Woodward-E Enid-W Enid-E Tulsa-W TuLsa-E Harrison-W Harrison-E Poplar Bluff-W 

Plainview..E Clinton-W Clinlon-E Oklahoma City-W OkLahoma City-E Fort Smilh-W Fort Smith-E Russellville-W Russellville-E Memphis-W 

Amarillo-E Lawton-W Lawton-E Ardmore-W Ardmore-E Me Alester-W Me Alesler-E Little Rock-W Little Roek-E Helen.-W 

Lubboek-E Wichita F.II ... W Wichita Fails-E Sherman-W Sherman-E Texarkana-W Texarkan.-E EIDorado-W EI Dorado-E Greenwood-W 

101 100 99 98 97 96 95 94 93 92 
- - - - - - - - - - - - - - - - - - -

List of USGS Land Use Land Cover (LULC) Files (1 :250,000 km Format) 

38.5 

37.5 

36.5 

35.5 

Dodge City Pratt Wichita Joplin Springfield Rolla 

Penyton Woodward Enid Tulsa Harrison Poplar Bluff 

Plainview Clinton Oklahoma City Fort Smith 

Russellville, Conway, 

Flygap Mountain, 

Mountain View 

Memphis 

Amarillo Lawton Ardmore Mc Alester, Antlers, 

DeQueen, Mena Little Rock Helena 

Lubbock Wichita Falls Sherman Texarkana El Dorado Greenwood 

34.5.. 

102 100 98 96 94 92 
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I APPENDIX C - MODELING INPUT/OUTPUT FILES 

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