## Modeling Protocol for Southwestern Electri c Power Company Flint Creek Plant Dry FGD Installation

Prepared for Southwestern Electric Power Company for submittal to Arkansas Department of Environmental Quality

Prepared by David J. Long, PE American Electric Power Service Corporation Environmental Services Division Air Quality Services Section

November 19, 2009

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 i Table of Contents

LIST OF TABLES ........................................................................... i LIST OF FIGURES ......................................................................... i INTRODUCTION ...........................................................................1 STACK PARAMETERS AND EMISSIONS .......................................... 1 MODELING DOMAIN AND RECEPTOR GRID .................................... 2 METEOROLOGIC DATA SELECTED ............................................... 3 MODELING APPROACH ................................................................4 MATERIALS TO BE SUBMITTED ................................................... 5 APPENDIX – BPIP INPUTS AND OUTPUTS ....................................... 7

List of Tables

Table 1. Flint Creek Plant Operating Input Data ......................................... 2 Table 2. Impact levels for use in determining if detailed modeling is required ...... 5

List of Figures

Figure 1. Flint Creek Modeling Domain ................................................... 3

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 1 

## INTRODUCTION

In order to comply with the requirements of the Federal and State Best Available Retrofit Technology (BART) Rules, Southwestern Elect ric Power Company has elected to install a Dry FGD system and new Low NO x 

### Burners with Overfire Air on its Flint Creek Plant. This document outlines the air quality modeling analyses to be conducted as part of the permitting process for this equipment to de monstrate that the installation of this equipment at Flint Creek Plant will not have an adverse impact on ambient air quality in the area surrounding the plant site.



## STACK PARAMETERS AND EMISSIONS

Emissions and stack data to be used in this modeling are shown in Table 1. The current design calls for reuse of the existing stack; th erefore the stack coordinates will not change between the existing and scrubbed cases. The existing full load exit velocity and temperature is based on the 2008 Part 75 Fl ow RATA performed on November 11, 2008. This was the only load tested during this RATA . The flow for the existing low load case is based on a temperature adjusted design fl ow from the low load FGD Case. The full and low load FGD Cases are based on desi gn information from the technology supplier available at the time of protocol developmen t. The mid load cases for both the existing and FGD cases are interpolated as being half way between the full a nd low load cases.

SO 2 

### emissions for the existing cases are ba sed on the NSPS limit of 1.2 lb/MMBtu and the presumptive BART SO 2 

### limit of 0.15 lb/MMBTU for the FGD cases. NO x 

### emissions are similarly developed using the NSPS limit of 0.7 lb/MMBtu for the existing cases and the presumptive BART NO x 

### limit of 0.23 lb/MMBtu for the control cases. CO is anticipated to increase as a result of th e installation of the new Low NOx Burners and Overfire Air from the current full load permit limit of 822.3 lb/hr or 0.13 lb/MMBtu to 0.15 lb/MMBtu or 948.6 lb/hr. It is not antici pated that the installation of the Dry FGD system will result in the change of emissions for any other permitted pollutant. The total particulate emissions, are based on a 0.123 lb/M MBtu emission rate which includes the primary particulate limit of 0.1 lb/MMBtu plus and allowance of 0.023 lb/MMBtu for condensible particulates, and lead which w ill be modeled based on a full load emission limit of 0.082 lb/hr for both cases. These values will then be scaled to develop the lower load emission estimates shown in Table 1.

Based on the use of the USEPA Building Profil e Input Program (BPIP) the existing stack height of 540 feet is slightly greater than the Good Engineering Practice (GEP) stack height calculated by BPIP of 513 feet, which will be used for the modeling. While it is not necessary to include building profile informa tion in this case of a stack height at or above GEP, the BPIP outputs are being incl uded in the modeling input files. The Appendix to this protocol contains the BP IP inputs and outputs for both the FGD and non FGD cases.

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 2 Table 1. Flint Creek Plant input data. Parameter Unit 1 6324 MMBtu Unit 1 4067 MMBtu Unit 1 1810 MMBtu Stack UTM Coordinates Northing/Easting 4013440 363080 4013440 363080 4013440 363080 UTM Zone/NAD Zone 15 NAD 83 Zone 15 NAD 83 Zone 15 NAD 83 Stack Height (meters) 156.37 156.37 156.37 Stack Diameter (meters) 6.1 6.1 6.1 Existing Case Stack Temperature (K) 412.9 408.2 405.4 Existing Case Stack Flow Rate (acfm) 1,943,587 1322082 697512 Existing Case Stack Exit Velocity (m/sec) 31.43 21.38 11.27 Scrubbed Case Stack Temperature (K) 352.8 351.7 350.5 Scrubbed Case Stack Flow Rate (acfm) 1,850,032 1,225,882 601,733 Scrubbed Case Stack Exit Velocity (m/sec) 29.92 19.82 9.73 Grade Elevation (meters) 353.6 353.6 353.6 Particulate (TSP and PM 10 ) lb/hr 778.4 406.7 181.0 Particulate (TSP and PM 10 ) g/sec 98.08 51.24 22.81 Lead lb/hr 0.082 0.053 0.023 Lead g/sec 0.010 0.007 0.003 SO 2 Existing – lb/hr 7588.8 4880.4 2172.0 SO 2 Existing - g/sec 956.17 614.92 273.67 SO 2 with FGD – lb/hr 948.6 610.1 271.5 SO 2 with FGD – g/sec 119.52 76.87 34.21 NO x Existing – lb/hr 4426.8 2846.9 1267.0 NO x Existing - g/sec 557.76 363.45 159.64 NO x with LNB/OFA – lb/hr 1454.52 935.41 416.3 NO x with LNB/OFA - g/sec 183.27 117.86 52.45 CO Existing – lb/hr 822.3 528.71 235.3 CO Existing - g/sec 103.61 66.62 29.65 CO with LNB/OFA – lb/hr 948.6 610.1 271.5 CO with LNB/OFA – g/sec 119.52 76.87 34.21



## MODELING DOMAIN A ND RECEPTOR GRID

The receptor grid has been developed using AERMAP version 09040. The overall receptor grid runs from a southwest co rner of 313000 easting by 3963400 northing in UTM Zone 15 to a northeast extent of 413000 easting by 4063400 northing. The overall grid contains an interior zone of 100 meter receptors extending from 358000 easting by 4008400 northing to 368100 easting by 4018500 for a total of 10,400 receptors. This is then surrounded by a 250 meter grid extending out approximately 10 additional kilometers with an extent of 348000 eas ting by 3998400 northing to 378250 easting by 4028650 northing generating 13203 receptors with a spacing of 250 meters. This is then surrounded by a coarse grid of 1 kilometer spacing which covers the balance of the domain, resulting in an additional 9240 receptors with a spacing of 1 kilometer. The total number of receptors being modeled is 32847. Figure 1 shows the configuration of this grid with the interior zone, in yellow, re presenting the 100 meter grid, the green zone representing the extent of the 250 meter recep tors, and the blue zone representing the 1

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 3 kilometer receptors. The plant is denoted by the red dot rou ghly in the center of the 100 meter receptor grid zone.

Figure 1. Receptor Grid for Flint Creek.

Note: Red dot in center gr id denotes stack location.



## METEOROLOGIC DATA SELECTED

The surface meteorologic data selected for this study was taken from the Automatic Surface Observation Station (ASOS) at the Northwest Arkansas Regional Airport near Bentonville, Arkansas. This data was se lected based on a review of the surface characteristics of the Flint Creek Plant site and the area surrounding the meteorologic instruments at the airport. Additional site s were reviewed, but not deemed sufficiently representative of the Flint Creek Plant site due to excess urbanization near the meteorologic monitoring stations. The addition al stations examined were at Ft. Smith, Arkansas; Tulsa, Oklahoma; and Springfield, Missouri.

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 4 Following the selection of the Bentonville site as the prefer red source of surface meteorologic data, data covering the peri od January 1, 2003 at 0000 UTC to January 31 2009 at 2300 UTC was obtained in archived 3502 format from National Climatological Data Center (NCDC). This dataset typically reported three data lines per hour for the Bentonville ASOS site. This data was then examined to determine its completeness. This examination revealed that the da ta from 2003 through 2005 and 2007 through 2008 was sufficiently complete to be used. However, the data for the year 2006 was rejected due to a gap in the data set from 050 0 UTC on March 13 to 1635 UTC on July 19. Therefore, the five years of meteorologi c data selected for the study are 2003, 2004, 2005, 2007, and 2008.

Upper Air data was obtained for the same years as the surface data from the NOAA/ERSL Radiosonde Database 1 

### for the Springfield, Missouri radiosonde site. This site was selected as being climatologically representative of the Flint Creek Plant site and is sufficiently complete to allow processing of the selected years of surface data.

The data was ultimately processed into m odel ready form using AERMET version 06341. The surface parameters used in the Stage 3 processing of AERMET were developed for the Bentonville surface site using the AERS URFACE preprocessor over a 1 kilometer radius divided into eight 45 degree sectors. Due to format issues with the NCDC archived 3502 data and the inability of AERM ET to accept this specific version of the 3502 format, an additional step was taken prior to the exercising of AERMOD. This step used a program developed by Russell Lee 2 

### and made freely available on his web site to convert the archived 3502 format data into SAMSON format da ta, select a single value to represent the hour in those hour s where more than one value exists, and to convert the alpha descriptors for cloud cover into numeri cal values that AERM ET can handle. This process was documented by Lee in a 2003 paper “Using the New ISHD Format Meteorological Data in the Lakes En vironmental RAMMET View and AERMET View” 3 

### . The data from this process was then input as the surface data for AERMET. The upper air data required no supplemental processing for use in the AERMET

processor.



## MODELING APPROACH

AERMOD version 09292 will be used for the modeling done under this protocol. Initial modeling will be performed on emissions from the main stack for all pollutants shown in Table 1 at full, mid, and low loads as indi cated in Table 1. The change in ambient concentration will then be evaluated agains t USEPA Significant Impact Levels (SIL), shown in Table 2, to determine if additional analyses will be required. For those pollutants that exceed the Prevention of Significant Deterioration (PSD) significance

1 http://raob.fsl.noaa.gov/Welcome.cgi

2 http://www.rflee.com/ 3 Lee, Russell F., Using the New ISHD Form at Meteorological Data in the Lakes Environmental RAMMET View and AERMET View, http://www.rflee.com/RFL_Pages/ISHD.pdf , 2003.

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 5 levels for this project (likely only CO), or that the facility initially analyzed for PSD increment consumption, the additional analys es will include both an evaluation of the National Ambient Air Quality Standard ( NAAQS) and PSD increment. For any non-PSD pollutant whose change in ambient concentra tion exceeds the (SIL), only an evaluation of the NAAQS will be performed. Should any of these additional analyses be required, ADEQ will be consulted to determine the appropriate sources and emission rates to include in the analysis.

Since lead does not have an SIL establishe d for modeling purposes, it will be evaluated for compliance with the 2008 ambient standard using the following technique. Three month rolling averages of peak monthly aver ages will be generated starting with March 2003 and continuing forward to the December 2005 three month average. Due to the missing data issue with 2006, three month av erages will be picked up again with the March 2007 value and continued through the December 2008 three month average. Should an average exceed the NAAQS, but come from different receptors, each involved receptor will be evaluated for the same three mo nth period to determine if the standard is achieved.

Further, in the event that an elevated concen tration of regulatory in terest is modeled in the 1 kilometer portion of the grid, the sp aces between the elevated receptor and the adjacent receptors will be filled with 100 mete r receptors to better define level of the elevated value and its spatial extent.

Should a full NAAQS analysis be require d for a monitored pollutant, background concentrations will be determined using the average of the two consecutive year highest high second high monitored values from a single monitor in the region that do not appear to be impacted by emissions from Flint Creek Plant from the period 2004 – 2008.

Table 2. SILs to be used to determine if detailed modeling is required. Parameter and Averaging Time Significant Impact Level ( μ g) SO2 – 3 Hour 25 SO2 – 24 Hour 5 SO2 – Annual 1 NOx - Annual 1 PM10 - 24 Hour 5 PM10 - Annual 1 CO – 1 Hour 2000 CO – 8 Hour 500



## MATERIALS TO BE SUMBITTED

Once the modeling is completed, a final repo rt will be prepared that describes the modeling exercise and results. Table(s) s howing the changes in ambient impacts due to the project will be included as well as the re sults of any additional analyses performed. All input and output files w ill be supplied on CD or DVD media as appropriate for the

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 6 amount of data being transferred. The final modeling report will also discuss in detail any deviations that were deemed necessa ry during the process of performing the modeling from the plans outlined in this protocol.

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 7 

## APPENDIX BPIP INPUTS AND RESULTS FOR THE EXISTING AND FGD CASES

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 8 EXISTING CASE INPUT FILE

'Flint Creek BPIPPRM Run - Existing Case' 'P' 'METERS' 1.0 'UTMY' 0.00 21 'CTRLRM' 1 353.54 4 24.38 -24.38 0.0 0.0 0.0 0.0 15.24 -24.38 15.24 'TURBRM' 1 353.54 4 30.18 0.0 0.0 24.38 0.0 24.38 78.03 0.0 78.03 'BKRBAY' 1 353.54 4 56.16 24.38 15.24 35.66 15.24 35.66 54.03 24.38 54.03 'TRPHSE' 1 353.54 4 60.65 24.38 54.03 35.66 54.03 35.66 70.56 24.38 70.56 'BLRHSE' 1 353.54 4 65.84 35.66 17.81 72.78 17.81 72.78 65.40 35.66 65.40 'ECNXITDC' 1 353.54 4 39.47 72.78 33.76 77.56 33.76 77.56 51.15 72.78 51.15 'PCPINDCT' 1 353.54 10 26.56 77.56 33.76 89.13 33.76 94.80 28.09 99.05 28.09 146.77 37.53 146.77 45.57 99.05 57.14 94.80 57.14 89.13 51.15 77.56 51.15

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 9 'PREC1A' 1 353.54 4 35.14 99.05 57.14 146.77 45.57 150.55 62.34 102.36 73.67 'PREC1B' 1 353.54 4 35.14 99.05 28.09 146.77 37.53 150.55 21.72 102.36 11.32 '1ADISDCT' 1 353.54 8 30.94 81.75 67.53 86.01 67.53 86.01 73.67 97.62 73.67 150.55 62.34 151.50 65.86 97.62 77.45 81.75 77.45 '1BDISDCT' 1 353.54 8 30.94 81.75 17.94 81.75 7.78 97.62 7.78 151.50 18.42 150.55 21.72 91.62 11.32 86.01 11.32 86.01 17.94 '1AAIRHTR' 1 353.54 4 30.94 72.78 53.83 86.01 53.83 86.01 67.53 72.78 67.53 '1BAIRHTR' 1 353.54 4 30.94 72.78 17.94 86.01 17.94 86.01 30.93 72.78 30.93 'DISCHDCT' 1 353.54 4 39.47 87.69 40.48 93.32 40.48 93.32 81.47 87.69 81.47 'ASHSILO' 1 353.54 8 31.70 149.85 41.32 151.98 37.77 155.05 36.36 158.79 37.77

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 10 160.48 41.32 158.79 45.57 155.05 47.46 151.98 45.57 'SERVBDG' 1 353.54 4 4.42 -2.81 101.51 63.94 101.51 63.94 121.29 -2.81 121.29 'WHSETOOL' 1 353.54 4 5.99 99.98 142.32 99.98 170.75 76.49 170.75 76.49 142.32 'CTRRSOOF' 1 353.54 4 5.11 130.50 162.75 130.50 171.03 106.39 171.03 106.39 162.75 'NAVCOWHS' 1 353.54 4 4.82 149.67 136.17 149.67 172.26 134.83 172.26 134.83 136.17 'RSOSHOP' 1 353.54 4 5.19 123.46 109.55 123.46 123.77 104.92 123.77 104.92 109.55 'OILHSE' 1 353.54 4 3.66 80.20 101.52 80.20 113.88 75.87 113.88 75.87 101.52 1 'Stack' 353.54 164.59 90.56 90.13

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 11 EXISTING CASE OUTPUT

FLINT CREEK BPIPPRM RUN - EXISTING CASE

BPIP (DATED: 04274) DATE : 11/12/2009 TIME : 15:59:53 FLINT CREEK BPIPPRM RUN - EXISTING CASE

============================ BPIP PROCESSING INFORMATION:

============================

THE P FLAG HAS BEEN SET FOR PREPARING DOWNWASH RELATED DATA FOR A MODEL RUN UTILIZING THE PRIME ALGORITHM.

INPUTS ENTERED IN METERS WILL BE CONVERTED TO METERS USING A CONVERSION FACTOR OF 1.0000. OUTPUT WILL BE IN METERS.

THE UTMP VARIABLE IS SET TO UTMY. THE INPUT IS ASSUMED TO BE IN UTM COORDINATES. BPIP WILL MOVE THE UTM ORIGIN TO THE FIRST PAIR OF UTM COORDINATES READ. THE UTM COORDINATES OF THE NEW ORIGIN WILL BE SUBTRACTED FROM ALL THE OTHER UTM COORDINATES ENTERED TO FORM THIS NEW LOCAL COORDINATE SYSTEM.

PLANT NORTH IS SET TO 0.00 DEGREES WITH RESPECT TO TRUE NORTH.

FLINT CREEK BPIPPRM RUN - EXISTING CASE

PRELIMINARY* GEP STACK HEIGHT RESULTS TABLE (OUTPUT UNITS: METERS)

STACK-BUILDING PRELIMINARY* STACK STACK BASE ELEVATION GEP** GEP STACK NAME HEIGHT DIFFERENCES EQN1 HEIGHT VALUE

STACK 164.59 0.00 156.37 156.37

* RESULTS ARE BASED ON DETERMINANTS 1 & 2 ON PAGES 1 & 2 OF THE GEP TECHNICAL SUPPORT DOCUMENT. DETERMINANT 3 MAY BE INVESTIGATED FOR ADDITIONAL STACK HEIGHT CREDIT. FINAL VALUES RESULT AFTER DETERMINANT 3 HAS BEEN TAKEN INTO CONSIDERATION. ** RESULTS WERE DERIVED FROM EQUATION 1 ON PAGE 6 OF GEP TECHNICAL SUPPORT DOCUMENT. VALUES HAVE BEEN ADJUSTED FOR ANY STACK-BUILDING BASE ELEVATION DIFFERENCES.

NOTE: CRITERIA FOR DETERMINING STACK HEIGHTS FOR MODELING EMISSION LIMITATIONS FOR A SOURCE CAN BE FOUND IN TABLE 3.1 OF THE GEP TECHNICAL SUPPORT DOCUMENT.

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 12 BPIP (DATED: 04274) DATE : 11/12/2009 TIME : 15:59:53

FLINT CREEK BPIPPRM RUN - EXISTING CASE

BPIP OUTPUT IS IN METERS

SO BUILDHGT STACK 60.65 60.65 60.65 65.84 65.84 65.84 SO BUILDHGT STACK 65.84 60.65 60.65 56.16 39.47 39.47 SO BUILDHGT STACK 39.47 39.47 65.84 65.84 56.16 60.65 SO BUILDHGT STACK 60.65 60.65 60.65 65.84 65.84 65.84 SO BUILDHGT STACK 65.84 60.65 60.65 56.16 39.47 39.47 SO BUILDHGT STACK 39.47 39.47 65.84 65.84 56.16 60.65 SO BUILDWID STACK 56.82 63.52 68.29 59.03 60.32 59.77 SO BUILDWID STACK 57.42 60.35 52.75 57.80 40.44 83.96 SO BUILDWID STACK 85.83 85.09 55.94 51.16 56.37 48.40 SO BUILDWID STACK 56.82 63.52 68.29 59.03 60.32 59.77 SO BUILDWID STACK 57.42 60.35 52.75 57.80 40.44 83.96 SO BUILDWID STACK 85.83 85.09 55.94 51.16 56.37 48.40 SO BUILDLEN STACK 53.31 57.42 59.77 60.32 59.03 55.94 SO BUILDLEN STACK 51.16 49.64 48.40 56.82 19.31 62.40 SO BUILDLEN STACK 60.19 60.32 59.77 57.42 60.35 52.75 SO BUILDLEN STACK 53.31 57.42 59.77 60.32 59.03 55.94 SO BUILDLEN STACK 51.16 49.64 48.40 56.82 19.31 62.40 SO BUILDLEN STACK 60.19 60.32 59.77 57.42 60.35 52.75 SO XBADJ STACK -80.75 -86.74 -90.08 -90.69 -88.54 -83.70 SO XBADJ STACK -76.32 -71.44 -66.18 -61.78 0.26 -35.18 SO XBADJ STACK -26.16 -1 6.34 -6.03 4.46 7.78 19.57 SO XBADJ STACK 27.44 29.32 30.31 30.37 29.52 27.76 SO XBADJ STACK 25.17 21.80 17.78 4.95 -19.57 -27.22 SO XBADJ STACK -34.03 -43.97 -53.74 -61.88 -68.13 -72.32 SO YBADJ STACK 33.36 23.73 13.38 -3.35 -13.81 -23.85 SO YBADJ STACK -33.17 -37.96 -45.95 -56.34 -27.42 -48.10 SO YBADJ STACK -47.77 -46.00 -55.73 -50.74 -49.99 -41.98 SO YBADJ STACK -33.36 -23.73 -13.38 3.35 13.81 23.85 SO YBADJ STACK 33.17 37.96 45.95 56.34 27.42 48.10 SO YBADJ STACK 47.77 46.00 55.73 50.74 49.99 41.98

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 13 FGD CASE INPUT

'Flint Creek BPIPPRM Run - FGD Case' 'P' 'METERS' 1.0 'UTMY' 0.00 33 'CTRLRM' 1 353.54 4 24.38 -24.38 0.0 0.0 0.0 0.0 15.24 -24.38 15.24 'TURBRM' 1 353.54 4 30.18 0.0 0.0 24.38 0.0 24.38 78.03 0.0 78.03 'BKRBAY' 1 353.54 4 56.16 24.38 15.24 35.66 15.24 35.66 54.03 24.38 54.03 'TRPHSE' 1 353.54 4 60.65 24.38 54.03 35.66 54.03 35.66 70.56 24.38 70.56 'BLRHSE' 1 353.54 4 65.84 35.66 17.81 72.78 17.81 72.78 65.40 35.66 65.40 'ECNXITDC' 1 353.54 4 39.47 72.78 33.76 77.56 33.76 77.56 51.15 72.78 51.15 'PCPINDCT' 1 353.54 10 26.56 77.56 33.76 89.13 33.76 94.80 28.09 99.05 28.09 146.77 37.53 146.77 45.57 99.05 57.14 94.80 57.14 89.13 51.15 77.56 51.15

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 14 'PREC1A' 1 353.54 4 35.14 99.05 57.14 146.77 45.57 150.55 62.34 102.36 73.67 'PREC1B' 1 353.54 4 35.14 99.05 28.09 146.77 37.53 150.55 21.72 102.36 11.32 '1ADISDCT' 1 353.54 8 30.94 81.75 67.53 86.01 67.53 86.01 73.67 97.62 73.67 150.55 62.34 151.50 65.86 97.62 77.45 81.75 77.45 '1BDISDCT' 1 353.54 8 30.94 81.75 17.94 81.75 7.78 97.62 7.78 151.50 18.42 150.55 21.72 91.62 11.32 86.01 11.32 86.01 17.94 '1AAIRHTR' 1 353.54 4 30.94 72.78 53.83 86.01 53.83 86.01 67.53 72.78 67.53 '1BAIRHTR' 1 353.54 4 30.94 72.78 17.94 86.01 17.94 86.01 30.93 72.78 30.93 'DISCHDCT' 1 353.54 4 39.47 87.69 40.48 93.32 40.48 93.32 81.47 87.69 81.47 'ASHSILO' 1 353.54 8 31.70 149.85 41.32 151.98 37.77 155.05 36.36 158.79 37.77

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 15 160.48 41.32 158.79 45.57 155.05 47.46 151.98 45.57 'SERVBDG' 1 353.54 4 4.42 -2.81 101.51 63.94 101.51 63.94 121.29 -2.81 121.29 'WHSETOOL' 1 353.54 4 5.99 99.98 142.32 99.98 170.75 76.49 170.75 76.49 142.32 'CTRRSOOF' 1 353.54 4 5.11 130.50 162.75 130.50 171.03 106.39 171.03 106.39 162.75 'NAVCOWHS' 1 353.54 4 4.82 149.67 136.17 149.67 172.26 134.83 172.26 134.83 136.17 'RSOSHOP' 1 353.54 4 5.19 123.46 109.55 123.46 123.77 104.92 123.77 104.92 109.55 'OILHSE' 1 353.54 4 3.66 80.20 101.52 80.20 113.88 75.87 113.88 75.87 101.52 'FGDINDCT' 1 353.54 7 35.66 102.57 -6.18 118.02 -6.18 103.80 0.62 93.32 11.74 93.32 43.27 87.69 43.27 87.69 9.89 'INLPLNM' 1 353.54 6 37.03 102.57 -6.18 118.02 -6.18 118.02 -18.54 130.27 -27.82 90.71 -27.82

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 16 102.57 -18.54 'FNGRDCTS' 1 353.54 4 38.86 90.71 -27.82 130.27 -27.82 130.27 -32.77 90.71 -32.77 'SDAINLT' 1 353.54 4 38.86 90.71 -32.77 130.27 -32.77 130.27 -36.48 90.71 -36.48 'SDAUNIT' 1 353.54 4 46.18 90.71 -36.48 130.27 -36.48 130.27 -52.55 90.71 -52.55 'SDAOUTLT' 1 353.54 7 22.86 116.05 -82.83 116.05 -69.24 65.36 -69.24 65.36 -72.95 69.69 -75.42 91.32 -75.42 104.30 -82.83 'BAGHOUSE' 1 353.54 4 30.40 123.46 -133.52 123.46 -82.83 96.88 -82.83 96.88 -133.52 'DISFANS' 1 353.54 15 6.25 80.82 -65.52 80.82 -32.14 76.49 -23.49 76.49 -15.45 93.18 4.94 87.69 9.89 70.93 -12.98 70.93 -23.49 65.36 -32.14 65.36 -65.52 69.07 -65.52 69.07 -32.14 73.40 -28.43 77.73 -32.14 77.73 -65.52 'SDAMECH' 1 353.54 4 28.04 125.32 -76.66 125.32 -71.71 116.05 -71.71

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 17 116.05 -76.66 'LIMEASHS' 1 353.54 8 31.70 161.59 41.32 163.66 37.77 166.79 36.36 170.53 37.77 172.22 41.32 170.53 45.57 166.79 47.46 163.66 45.57 'LAMBDG' 1 353.54 4 5.49 182.25 33.90 182.25 48.12 172.98 48.12 172.98 33.90 'SDASGBDG' 1 353.54 4 5.49 78.34 -121.16 78.34 -87.78 63.51 -87.78 63.51 -121.16 1 'Stack' 353.54 164.59 90.56 90.13

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 18 FGD CASE OUTPUT

Flint Creek BPIPPRM Run - FGD Case

BPIP (Dated: 04274) DATE : 11/13/2009 TIME : 10:14:51 Flint Creek BPIPPRM Run - FGD Case

============================ BPIP PROCESSING INFORMATION:

============================

The P flag has been set for preparing downwash related data for a model run utilizing the PRIME algorithm.

Inputs entered in METERS will be converted to meters using a conversion factor of 1.0000. Output will be in meters.

The UTMP variable is set to UTMY. The input is assumed to be in UTM coordinates. BPIP will move the UTM origin to the first pair of UTM coordinates read. The UTM coordinates of the new origin will be subtracted from all the other UTM coordinates entered to form this new local coordinate system.

Plant north is set to 0.00 degrees with respect to True North.

Flint Creek BPIPPRM Run - FGD Case

PRELIMINARY* GEP STACK HEIGHT RESULTS TABLE (Output Units: meters)

Stack-Building Preliminary* Stack Stack Base Elevation GEP** GEP Stack Name Height Di fferences EQN1 Height Value

Stack 164.59 0.00 156.37 156.37

* Results are based on Determinants 1 & 2 on pages 1 & 2 of the GEP Technical Support Document. Determinant 3 may be investigated for additional stack height credit. Final values result after Determinant 3 has been taken into consideration. ** Results were derived from Equation 1 on page 6 of GEP Technical Support Document. Values have been adjusted for any stack-building base elevation differences.

Note: Criteria for determining stack heights for modeling emission limitations for a source can be found in Table 3.1 of the GEP Technical Support Document.

### Flint Creek Dry FGD Installation M odeling Protocol November 19, 2009 19 BPIP (Dated: 04274) DATE : 11/13/2009 TIME : 10:14:51

Flint Creek BPIPPRM Run - FGD Case

BPIP output is in meters

SO BUILDHGT Stack 60.65 60.65 60.65 65.84 65.84 65.84 SO BUILDHGT Stack 65.84 60.65 60.65 56.16 39.47 39.47 SO BUILDHGT Stack 39.47 39.47 65.84 65.84 56.16 60.65 SO BUILDHGT Stack 60.65 60.65 60.65 65.84 65.84 65.84 SO BUILDHGT Stack 65.84 60.65 60.65 56.16 39.47 39.47 SO BUILDHGT Stack 39.47 39.47 65.84 65.84 56.16 60.65 SO BUILDWID Stack 56.82 63.52 68.29 59.03 60.32 59.77 SO BUILDWID Stack 57.42 60.35 52.75 57.80 40.44 83.96 SO BUILDWID Stack 85.83 85.09 55.94 51.16 56.37 48.40 SO BUILDWID Stack 56.82 63.52 68.29 59.03 60.32 59.77 SO BUILDWID Stack 57.42 60.35 52.75 57.80 40.44 83.96 SO BUILDWID Stack 85.83 85.09 55.94 51.16 56.37 48.40 SO BUILDLEN Stack 53.31 57.42 59.77 60.32 59.03 55.94 SO BUILDLEN Stack 51.16 49.64 48.40 56.82 19.31 62.40 SO BUILDLEN Stack 60.19 60.32 59.77 57.42 60.35 52.75 SO BUILDLEN Stack 53.31 57.42 59.77 60.32 59.03 55.94 SO BUILDLEN Stack 51.16 49.64 48.40 56.82 19.31 62.40 SO BUILDLEN Stack 60.19 60.32 59.77 57.42 60.35 52.75 SO XBADJ Stack -80.75 -86.74 -90.08 -90.69 -88.54 -83.70 SO XBADJ Stack -76.32 -71.44 -66.18 -61.78 0.26 -35.18 SO XBADJ Stack -26.16 -16.34 -6.03 4.46 7.78 19.57 SO XBADJ Stack 27.44 29.32 30.31 30.37 29.52 27.76 SO XBADJ Stack 25.17 21.80 17.78 4.95 -19.57 -27.22 SO XBADJ Stack -34.03 -43.97 -53.74 -61.88 -68.13 -72.32 SO YBADJ Stack 33.36 23.73 13.38 -3.35 -13.81 -23.85 SO YBADJ Stack -33.17 -37.96 -45.95 -56.34 -27.42 -48.10 SO YBADJ Stack -47.77 -46.00 -55.73 -50.74 -49.99 -41.98 SO YBADJ Stack -33.36 -23.73 -13.38 3.35 13.81 23.85 SO YBADJ Stack 33.17 37.96 45.95 56.34 27.42 48.10 SO YBADJ Stack 47.77 46.00 55.73 50.74 49.99 41.98