Summary of WRAP RMC BART Modeling for Utah 

Draft#6 

April 21, 2007 

More Information: http://pah.cert.ucr.edu/aqm/308/bart.shtml

This document summarizes the preliminary CALMET/CALPUFF BART modeling results 

performed by the WRAP RMC for Utah. The procedures used are outlined in the WRAP RMC 

BART Modeling Protocol that is available at: 

http://pah.cert.ucr.edu/aqm/308/bart/WRAP_RMC_BART_Protocol_Aug15_2006.pdf

The basic assumptions in the WRAP BART CALMET/CALPUFF modeling are as follows: 

• Use of three years of modeling of 2001, 2002 and 2003 (except Alaska where just one 

year, 2002, was used). 

• Visibility impacts due to emissions of SO2, NOx and primary PM emissions were 

calculated (even for Section 309 States): 

o Unless States provided speciated PM emissions, all PM emissions were modeled 

as PM2.5. 

• Visibility was calculated using the Original IMPROVE equation and Annual Average 

Natural Conditions. 

The tables that follow contain the following information for each Utah BART source unit and 

each Class I area that is within at least 300 km of the source: 

• The first row contains the source number, name and SO2 and NOx emissions that were 

provided by the State. 

• Each subsequent row has information on the visibility impacts at a Class I area, with the 

columns containing the following information for the indicated Class I area: 

1. The Class I area; 

2. The distance (km) between the source and the closest receptor in the Class I 

area (only Class I areas with at least one receptor 300 km or less are included 

in the tables); 

3. The 98th percentile (8th highest) visibility impacts in 2001; 

4. The 98th percentile (8th highest) visibility impacts in 2002; 

5. The 98th percentile (8th highest) visibility impacts in 2003; and 

6. The average of the 98th percentile across 2001, 2002 and 2003. 

Figure 1 below shows the locations of the Hunter (labeled 1) and Huntington (labeled 2) sources 

in Utah and Class I areas in the modeling domain. The Hunter Units 1 and 2 and Huntington 

Units 1 and 2 sources are modeled using current emissions (SRC01 through SRC04) and future 

controlled emission levels (SRC05 through SRC08). 
-1600 -1400 -1200 -1000 -800

-500

-400

-300

-200

-100

0

100

200

300

400

500

600

Hunter 1 & 2

brid

crmo

eane

fitz

fito

grte

jarb

mozi

noab

redr sawt

teto wash

yell

Huntington 3 & 4

arch

brca

cany

care

grca

laga

mabe

maza

meve

pefo

pimo

sape

syca

weel

wemi

zion

blca

Figure 1. Relationship between Utah potential BART-eligible sources and Class I areas. 

Hunter Units 1 and 2 and Huntington Units 1 and 2 modeled separate using uncontrolled 

(SRC01-SRC04) and controlled (SRC05-SRC8) emissions. 
Table 1. Hunter and Huntington Units 1 and 2 current and future controlled emission levels. Modeling was perf

stack parameters in current and future conditions. 

Current Plant Configurations

* = Calculated Based on Permit Limit

Actual Emissions * - 1 hour Values (lb/hr) for 2002-2003 24-hour Max. Emission DayPlant Unit SO2 NOX PM Hunter (SRC01) 1 1402 2309 83.25 Hunter (SRC02) 2 1427 1924 83.25 Huntington (SRC03) 1 1555 1887 166.9 Huntington (SRC04) 2 5537 1912 76.1 Current Plant Stack Parameters

Plant Unit Stack Location (UTM) Stack Height (m) Stack Diameter (m) E

Hunter (SRC01) 1 497310/4335950 182.9 7.32 Hunter (SRC02) 2 497360/4335950 182.9 7.32 Huntington (SRC03) 1 493100/4358840 182.9 7.32 Huntington (SRC04) 2 493150/4358840 182.9 7.32 Future Configurations Calculated 1-hr Emissions in lb/hr - Using Maximum Boiler Capacity and Proposed Permitted Emissions Limits Changed emission rates to reflected "permitted" not "best expected" rates Huntington 2 emission rates are listed in the AO for the Huntington 2 pollution control projects Plant Unit SO2 NOX PM Hunter (SRC05) 1 199.8 432.9 24.975 Hunter (SRC06) 2 199.8 432.9 24.975 Huntington (SRC07) 1 203.90 441.79 70 Huntington (SRC08) 2 182.64 395.72 70 Permitted Rates (lb/mmBTU) 0.12 0.26 0.15 BACT Presumptive Rates 0.15 0.28 
UT SRC01 Current Hunter Unit #1: SO2 = 6,141 TPY; NOx = 10,113 TPY 

Annual Average Natural Conditions 

Class I Areas with at least 1 receptor within 300 km of source 

Minimum 

Distance 

98th percentile for 

each year 98th 

(km) 2001 2002 2003 

3 year 

AVG 

Capitol Reef National Park 75 1.55 2.63 2.20 2.13 

Canyonlands National Park 105 2.02 1.60 1.97 1.87 

Arches National Park 119 1.73 1.25 1.61 1.53 

Bryce Canyon National Park 187 0.64 0.69 0.32 0.55 

Zion National Park 258 0.67 0.50 0.20 0.46 

Grand Canyon National Park 273 0.57 0.77 0.43 0.59 

Black Canyon of the Gunnison Wilderness Area 281 0.67 0.60 0.55 0.60 

Mesa Verde National Park 300 0.64 0.52 0.44 0.53 

UT SRC02 Current Hunter Unit #2: SO2 = 6,250 TPY; NOx = 8,427 TPY 

Annual Average Natural Conditions 

Class I Areas with at least 1 receptor within 300 km of source 

Minimum 

Distance 

98th percentile for 

each year 98th 

(km) 2001 2002 2003 

3 year 

AVG 

Capitol Reef National Park 75 1.43 2.33 1.93 1.89 

Canyonlands National Park 105 1.68 1.42 1.77 1.62 

Arches National Park 119 1.51 1.17 1.42 1.36 

Bryce Canyon National Park 187 0.54 0.60 0.28 0.47 

Zion National Park 258 0.59 0.46 0.19 0.41 

Grand Canyon National Park 273 0.52 0.69 0.36 0.52 

Black Canyon of the Gunnison Wilderness Area 281 0.59 0.53 0.48 0.53 

Mesa Verde National Park 300 0.57 0.45 0.38 0.47 

UT SRC03 Current Huntington Unit #1: SO2 = 6,811 TPY; NOx = 8,265 TPY 

Annual Average Natural Conditions 

Class I Areas with at least 1 receptor within 300 km of source 

Minimum 

Distance 

98th percentile for 

each year 98th 

(km) 2001 2002 2003 

3 year 

AVG 

Capitol Reef National Park 74 1.43 2.40 1.93 1.92 

Canyonlands National Park 105 1.68 1.51 1.75 1.64 

Arches National Park 119 1.52 1.16 1.50 1.39 

Bryce Canyon National Park 186 0.53 0.62 0.29 0.48 

Zion National Park 257 0.61 0.49 0.20 0.43 

Grand Canyon National Park 272 0.54 0.72 0.39 0.55 

Black Canyon of the Gunnison Wilderness Area 282 0.60 0.56 0.51 0.56 

Mesa Verde National Park 300 0.58 0.46 0.41 0.48 
UT SRC04 current Huntington Unit #2: SO2 = 24,252 TPY; NOx = 8375 TPY 

Annual Average Natural Conditions 

Class I Areas with at least 1 receptor within 300 km of source 

Minimum 

Distance 

98th percentile for 

each year 98th 

(km) 2001 2002 2003 

3 year 

AVG 

Capitol Reef National Park 74 1.98 2.85 2.47 2.43 

Canyonlands National Park 105 2.06 2.22 2.51 2.26 

Arches National Park 119 1.74 1.88 2.04 1.89 

Bryce Canyon National Park 186 0.98 1.14 0.60 0.91 

Zion National Park 257 1.01 0.83 0.51 0.78 

Grand Canyon National Park 272 0.94 1.27 0.76 0.99 

Black Canyon of the Gunnison Wilderness Area 282 1.26 1.12 1.03 1.14 

Mesa Verde National Park 300 1.12 0.81 0.81 0.91 

UT SRC05 Controlled Hunter Unit #1: SO2 = 875 TPY; NOx = 1896 TPY 

Annual Average Natural Conditions 

Class I Areas with at least 1 receptor within 300 km of source 

Minimum 

Distance 

98th percentile for 

each year 98th 

(km) 2001 2002 2003 

3 year 

AVG 

Capitol Reef National Park 75 0.01 0.02 0.02 0.02 

Canyonlands National Park 105 0.02 0.01 0.02 0.02 

Arches National Park 119 0.01 0.01 0.01 0.01 

Bryce Canyon National Park 187 0.01 0.01 0.00 0.00 

Zion National Park 258 0.01 0.00 0.00 0.00 

Grand Canyon National Park 273 0.00 0.01 0.00 0.00 

Black Canyon of the Gunnison Wilderness Area 281 0.01 0.00 0.00 0.00 

Mesa Verde National Park 300 0.01 0.00 0.00 0.00 

UT SRC06 Controlled Hunter Unit #2: SO2 = 875 TPY; NOx = 1896 TPY 

Annual Average Natural Conditions 

Class I Areas with at least 1 receptor within 300 km of source 

Minimum 

Distance 

98th percentile for 

each year 98th 

(km) 2001 2002 2003 

3 year 

AVG 

Capitol Reef National Park 75 0.01 0.02 0.02 0.02 

Canyonlands National Park 105 0.02 0.01 0.02 0.01 

Arches National Park 119 0.01 0.01 0.01 0.01 

Bryce Canyon National Park 187 0.01 0.01 0.00 0.00 

Zion National Park 258 0.01 0.00 0.00 0.00 

Grand Canyon National Park 273 0.00 0.01 0.00 0.00 

Black Canyon of the Gunnison Wilderness Area 281 0.01 0.00 0.00 0.00 

Mesa Verde National Park 300 0.01 0.00 0.00 0.00 
UT SRC07 Controlled Huntington Unit #1: SO2 = 893 TPY; NOx = 1935 TPY 

Annual Average Natural Conditions 

Class I Areas with at least 1 receptor within 300 km of source 

Minimum 

Distance 

98th percentile for 

each year 98th 

(km) 2001 2002 2003 

3 year 

AVG 

Capitol Reef National Park 74 0.01 0.02 0.02 0.02 

Canyonlands National Park 105 0.02 0.01 0.02 0.02 

Arches National Park 119 0.01 0.01 0.01 0.01 

Bryce Canyon National Park 186 0.01 0.01 0.00 0.00 

Zion National Park 257 0.01 0.00 0.00 0.00 

Grand Canyon National Park 272 0.00 0.01 0.00 0.00 

Black Canyon of the Gunnison Wilderness Area 282 0.01 0.01 0.00 0.01 

Mesa Verde National Park 300 0.01 0.00 0.00 0.00 

UT SRC08 Controlled Huntington Unit #2: SO2 = 800 TPY; NOx = 1,733 TPY 

Annual Average Natural Conditions 

Class I Areas with at least 1 receptor within 300 km of source 

Minimum 

Distance 

98th percentile for 

each year 98th 

(km) 2001 2002 2003 

3 year 

AVG 

Capitol Reef National Park 74 0.01 0.02 0.01 0.01 

Canyonlands National Park 105 0.01 0.01 0.01 0.01 

Arches National Park 119 0.01 0.01 0.01 0.01 

Bryce Canyon National Park 186 0.01 0.01 0.00 0.00 

Zion National Park 257 0.00 0.00 0.00 0.00 

Grand Canyon National Park 272 0.00 0.01 0.00 0.00 

Black Canyon of the Gunnison Wilderness Area 282 0.01 0.00 0.00 0.00 

Mesa Verde National Park 300 0.00 0.00 0.00 0.00