### Sources that are Potentially Major Sources for PSD This list is not an applicability determination for any

source. It is intended to be a list of sources that may potentially

be affected by

the federal NSR reform program. This list does not include new sources that have not yet begun operation. Sources that had low emissions during the screening years may not be included on this list.

Sources that are already allowed to use actual to projected actual test under WEPCO NOx PM 10 VOC SO2 CO

1 Intermountain Power Service Corporation Intermountain Generation Station X X X X X 2 PacifiCorp Hunter Power Plant X X X X X 3 PacifiCorp Huntington Power Plant X X ? X X 4 PacifiCorp Carbon Power Plant X X ? X X 5 PacifiCorp Gadsby Power Plant X X 6 Sunnyside Cogeneration Associates Sunnyside Cogeneration Facility X ? X X 7 PacifiCorp Currant Creek

NOx PM 10 VOC SO2 CO

8 Kennecott Utah Copper Corporation N Concentrator,Power Plt, Lab, Tailings Impoundmnt X X X 9 Tesoro W est Coast Salt Lake City Refinery X X X X 10 Kennecott Utah Copper Corporation Sm elter, Refinery X X X 11 Brigham Young University Main Cam pus X X 12 Payson City

Corporation Payson City Power X 13 Provo City

Power Power Plant X 14 Geneva Nitrogen Inc. Geneva Nitrogen Plant X 15 Silver Eagle Refining - W oods Cross Inc. Petroleum Products Refining X Sources in PM10 Nonattainment or Ozone Maintenance Area that are not initially affected by changes to PSD rule

### Sources that are Potentially Major Sources for PSD This list is not an applicability determination for any

source. It is intended to be a list of sources that may potentially

be affected by

the federal NSR reform program. This list does not include new sources that have not yet begun operation. Sources that had low emissions during the screening years may not be included on this list.

NOx PM 10 VOC SO2 CO Sources that have undergone PSD Review 1 Graymo nt W estern US Incorporated Cricket Mountain Plant X X X X 2 Ashgrove Cement Company Leam ington Cem ent Plant X X X 3 Nucor Steel Nucor Steel X X X X 4 ATK Thiokol Propulsion Promontory Plant X 5 Holcim (US) Inc Devil'S Slide Plant X X X X X 6 Great Salt Lake Minerals Corporation We st Desert Operation - Salt & Potash Plants X 7 Holly

Refining and Marketing Company Phillips Refinery X X X X X

Sources that have been regulated under minor source NSR, SIP, or other regulatory programs NOx PM 10 VOC SO2 CO

8 US Magnesium LLC Rowley Plant X X X 9 Questar Pipeline Company Kastler/Marushack Compressor Station X X 10 Chevron Products Co - SL Refinery Salt Lake Refinery X X X X X 11 EnCana Oil & Gas (USA) Incorporated Lisbon Natural Gas Processing Plant X X X 12 Flying J Incorporated Flying J Refinery (Big W est Oil Co.) X X X X 13 Chemical Lime Company Grantsville Plant X X X 14 St George City

Power Red Rock Power Generating Station X 15 Deseret Chemical Depot Deseret Chemical Depot (South Area) X 16 Vulcraft, Division of Nucor Corporation Steel Products Manufacturing X 17 Pacific States Cast Iron Pipe Company Pipe Casting Plant X X 18 We stinghouse Electric Company LLC Zirconium/Halfnium Production Plant X 19 University

of Utah University Of Utah Facilities X X 20 Interstate Brick Brick Manufacturing Plant X 21 Wa satch Integrated W aste Management Energy Recovery

Facility (Dcerf) XGrandfathered Sources (Most of the plant not covered by AO) NOx PM 10 VOC SO2 CO

22 Pacificorp Little Mountain Power Plant X 23 Canyon Gas Resources LLC San Arroyo Plant X 24 El Paso Field Operations Company Bluebell Gas Plant X 25 El Paso Field Operations Company Altam ont Main Gas Processing Plant X X 26 Canyon Gas Resources LLC We stwater Compressor Station X 27 Wh iting Oil and Gas Corporation Bridger Lake Plant X 28 El Paso Field Operations Company Altam ont South Compressor Station X 29 El Paso Field Operations Company Altam ont East Compressor Station X

8 Sources with emissions > 1000 tpy any pollutant 11 Sources with emissions <300 tpy any pollutantThis list is not an applicability determination for any

source. It is intended to be a list of sources that may potentially

be affected by

the federal NSR reform program. This list does not include new sources that have not yet begun operation. Sources that had low emissions during the screening years may not be included on this list.

1999 Emissions Comment NOx PM 10 VOC SO2 CO

28,261 1,943 158 3,698 1,312 20,305 2,269 127 7,045 1,057 15,019 1,592 88 13,901 740 2,980 196 <50 4,388 63 200 <50 <50 <50 154 460 72 <50 1,059 95

- - -

1999 Emissions

Comment NOx PM 10 VOC SO2 CO

2,202 167 <50 2,818 115 534 89 246 1,107 71 216 281 <50 789 127 76 <50 <50 124 55 61 <50 57 <50 <50 15 <50 <50 <50 <50 76 <50 <50 <50 <50 100 <50 102 <50 <50This list is not an applicability determination for any

source. It is intended to be a list of sources that may potentially

be affected by

the federal NSR reform program. This list does not include new sources that have not yet begun operation. Sources that had low emissions during the screening years may not be included on this list. 1999 Emissions Year PSD Permit Issued Comment NOx PM 10 VOC SO2 CO

1979 (new source), 1996 1,203 256 220 275 436 1980 (new source), 1995, 1996, 2005 1,367 113 <50 <50 13,352 1982, 1994, 1997, 2001 Began operation in 1980 237 92 52 60 1,670 1988, 1995, 2002 (new units - test shuttle motors DAQE-AN0009086-02) 158 838 75 <50 110 1996, 2001, 2002 1,258 240 <50 276 1,539 1996, <50 253 <50 <50 <50 2005? (source also addressed in PM10 and ozone SIPs) 640 117 260 787 780

Comment NOx PM 10 VOC SO2 CO

MACT (Cl 2 , HCl), BACT 1124 713 384 <50 316 NSPS(Subparts GG, KKK, Kb), BACT 772 <50 51 <50 67 PM10 SIP, Ozone SIP 584 126 276 792 362 BACT, NSPS (Subparts Dc, LLL, KKK) 432 <50 74 1349 556 PM10 SIP, Ozone SIP 215 <50 413 442 209 BACT (a portion of the crushing and handling equipment is grandfathered) 124 86 <50 <50 82 BACT 119 <50 <50 <50 <50 BACT, NSPS (Subparts Dc, EEE) 74 <50 <50 <50 <50 BACT for major VOC emission sources <50 <50 441 <50 <50 PM10 SIP, CO SIP, BACT <50 <50 286 <50 1269 BACT <50 <50 <50 <50 2191 PM10 SIP, NSPS (Subpart Dc), BACT 107 <50 <50 <50 63 PM10 SIP, BACT <50 97 65 <50 88 BACT, State Plan for Desig. Fac. 292 <50 <50 51 <50Comment NOx PM 10 VOC SO2 CO

18 MW gas turbine/generator grandfathered 259 <50 <50 <50 63 3 compressor engines grandfathered 391 <50 <50 <50 57 6 compressor engines grandfathered 579 <50 55 <50 182 8 compressor engines grandfathered 403 <50 110 <50 339 2 of 3 compressors engines grandfathered 56 <50 <50 <50 282 5 of 8 compressor engines grandfathered 230 <50 <50 <50 228 3 compressor engines grandfathered 205 <50 <50 <50 79 4 compressor engines grandfathered 156 <50 64 <50 66

### Emission Changes that would occur in Utah due to the adoption of the NSR Reform Provisions for PSD

Scenario Would the change be a major modification under the current PSD rules? Would the change be a major modification under NSR Reform PSD rules? Would the change be reviewed under Utah's state NSR program? Modeling required by State modeling rule to determine impact on NAAQS? Net change in actual emissions due to adoption of NSR Reform A. New major source Yes Yes Yes Yes 0 B. Big project at an existing major source (production increase, big new unit, major change in process) Yes Yes Yes Yes 0

C. New unit added at a major source that emits 100 tons/yr NOx. The major source has had a series of emission increases and decreases over the last 5 years. The combination of emission increases and decreases equals + 39 tons/yr NOx. No No Yes - BACT required Yes 0

D. An existing major source has fluctuating emissions and is currently operating well below its permitted capacity. Most of the emissions come from one big emissions unit. No changes are made at the source, but market conditions im prove and so the source increases to full capacity resulting in a large increase in emissions. No No No No 0 D.1 Source in scenario D adds a new emergency generator that emits 10 tons/yr NOx. No No Yes - BACT required on new generator No 0 D.2 Source in scenario D makes a modification to improve efficiency by 30%, leading to a permitted emission increase of 10 tons/yr. Yes No Yes - BACT required No 0

D.3 Source in scenario D makes a modification that reduce permitted NOx emissions by 30%. Assume BACT would reduce NOx emissions by 50%. Yes No No No possible increase in emissions, more likely emissions will decrease because disincentive is no longer there D.4 Source in scenario D waits 2 years and then installs low NOx burners that reduce NOx emissions by 40% (800 tons/yr). Assume BACT would reduce NOx emissions by 50% (1000 tons/yr). No No No No 0E. New Synthetic Minor. A new source that has the capability

to emit 300 tons/yr NOx agrees to an enforceable production lim it so that the source's PTE is 249 tons/yr NOx. No No Yes - BACT required Yes 0 F. An existing minor source that has a PTE of 200 tons/yr NOx installs a new emission unit that has a PTE of 200 tons/yr NOx. No No Yes Yes 0

G. An existing minor source that has a PTE of 200 tons/yr NOx installs a new emission unit that has a PTE of 300 tons/yr NOx Yes - the new unit would be subject to PSD review, but not the existing source Yes - the new unit would be subject to PSD review, but not the existing source Yes Yes 0

H. Source with a large amount of headroom. An existing, major source has an emission unit with a PTE of 400 tons/yr NOx. The source has been operating for the last 20 years with actual emissions of around 250 tons/yr because the source doesn't operate at full capacity 365 days/yr. The source wants to modifiy the existing unit to improve efficiency and increase production. The PTE of the modified project will increase to 420 tons/yr NOx. Projected future actual emissions are 270 tons/yr. Yes, unless the source agrees to an enforceable limitation that would reduce the PTE of the emissions unit to 289 tons/yr or less (a 39 tons/yr increase under the A to P test). No (source would probably need to lower their PTE to demonstrate that their future actual projection was reasonable - otherwise, why would they need so much headroom?) Yes - BACT required (UDAQ would likely tighten up the permit to remove excessive headroom) No 0

I. A source that is currently operating below capacity is gradually increasing production due to demand growth. The source makes a modification that decreases the PTE of the source by 20 tons/yr NOx. Yes No No No possible increase in emissions, more likely emissions will decrease because disincentive is no longer there

J. A W EPCO Source makes a change that would be a singificant increase under the actual to potential test, but not under the actual to future actual test. No (W EPCO sources are already using the actual to future actual test) No It would depend on the modification as described in the above examples 00

100 200 300 400 500 600 700

1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 

## Scenario D

Headroom Projected Actuals
Actual Emissions

### 0

100 200 300 400 500 600 700

1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 

### Scenario D2

Due to project
Headroom Projected Actuals
Actual Emissions 

### A to P test Increase = 535 tons/yr0

100 200 300 400 500 600 700

1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 

### Scenario D2

Due to project
Headroom Projected Actuals
Actual Emissions A to A test Increase of 10 tons/yr0

100 200 300 400 500 600 700

1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 

### Scenario D3

Due to project
Headroom Projected Actuals
Actual Emissions

A to P test Increase of 325 tons/yr0

100 200 300 400 500 600 700

1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 

### Scenario D3

Due to project
Headroom Projected Actuals
Actual Emissions A to A test Em ission decrease of 200 tons/yr0

100 200 300 400 500 600 700

1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 

### Scenario D4

Due to project
Headroom Projected Actuals
Actual Emissions A to P Test Em ission decrease of 175 tons/yr0

100 200 300 400 500 600 700

1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 

### Scenario I

Headroom
Demand Growth Projected Actuals
Actual Emissions A to P Test Em ission increase of 143 tons/yr0

100 200 300 400 500 600 700

1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 

### Scenario I

Headroom
Demand Growth Projected Actuals
Actual Emissions A to A test Em ission decrease of 20 tons/yrScenario Data

Year Actual

Em issions Permitted

PTE Projected

Actuals 1992 375 625 1993 390 625 1994 400 625 1995 600 625 1996 600 625 1997 500 625 1998 375 625 1999 300 625 2000 100 625 2001 100 625 2002 2003 2004 2005 2006 650

Scenario D

Year Actual

Em issions Headroom Projected Actuals 1992 375 250 1993 390 235 1994 400 225 1995 600 25 1996 600 25 1997 500 125 1998 375 250 1999 300 325 2000 100 525 2001 100 525 2002 25 600 2003 25 600 2004 2005 2006 2007 2008

Scenario D.2

Year Actual

Em issions Headroom Projected Actuals Due to

project 1992 375 250 1993 390 235 1994 400 225 1995 600 25 1996 600 25 0 100 200 300 400 500 600 700 

### Basic Chart1997 500 125

1998 375 250 1999 300 325 2000 100 525 2001 100 525 2002 25 600 10 2003 25 600 10 2004 2005 2006 600 10 2007 2008

Scenario D.3

Year Actual

Em issions Headroom Projected Actuals Due to

project 1992 375 250 1993 390 235 1994 400 225 1995 600 25 1996 600 25 1997 500 125 1998 375 250 1999 300 325 2000 100 525 2001 100 525 2002 25 400 2003 25 400 2004 2005 2006 25 400 2007 2008

Scenario D.4

Year Actual

Em issions Headroom Projected Actuals Due to

project 1992 375 250 1993 390 235 1994 400 225 1995 600 25 1996 600 25 1997 500 125 1998 375 250 1999 300 325 2000 100 525 2001 100 525 2002 600 25 2003 600 25 2004 25 4002005

2006 25 400 2007 2008

Scenario K

Year Actual

Em issions Headroom Projected Actuals Demand

Growth 1992 275 375 1993 300 350 1994 325 325 1995 350 300 1996 375 275 1997 400 250 1998 425 225 1999 450 200 2000 475 175 2001 500 150 2002 125 480 25 2003 100 480 50 2004 75 480 75 2005 50 480 100 2006 25 480 125 2007 2008Actual Emissions
Permitted PTE Projected Actuals