# NEVADA REGIONAL HAZE STATE IMPLEMENTATION PLAN

A Plan f o r Impl ementi ng Section 308 (40 CFR § 51.308) of the Regional Haze Rule

State of Nevada Division of Environm ental Protection 901 South Stewart S t reet, Suite 4001 Carson City, Nevada 89701



# October 2009

## NOTE TO READERS

Nevada’s Regional Haz e State Im plem entation Plan (SIP) w a s develop e d f o r subm ittal to the U.S. Environm ental Pro t ection Agency under S ection 308 o f the Regional Haze Rule (40 CFR § 51.308) as a revision to the appli cable Nevada state im plem entati on plan. The SIP is based on data that existed as of Janua ry 5, 2009 with one exception. In response to public com m e nts, Nevada re-evaluated the Best Available Retrofit Technology em ission lim its for SO 2 at NV Energy’s Reid Gardner f acility. The lim its were lowered based on 2009 data. This docum e nt is the in itial s t ep in a sequ entia l plann i ng ef f

o rt working toward achievi ng the national goal of returning to natural visi bility conditions in m a nd atory Class I areas by 2064.

Nevada’s Regional Haze SIP and related docu ments can be found on the following website: http://ndep.nv.gov/baqp/planm odeling/rhaze.htm l . W e stern Regional Ai r Partnership (WRAP) reports and docum ents can be found on the following websites: http://w ww.wrapair.org/ or at the W R AP TSS website : http://v ista.cira

. colostate.ed u/tss /

.

Nevada has chosen to link to webs ite s on the in te rnet f o r m a ny ref e re nce s cited in th is SIP. W e have backed up these links by put ting electronic copies of ref e rence docum e nts on the Nevada Division of Environm ental Protectio n’s (NDEP) server. If any of the links in this docum ent do not work for you, you may contact the NDEP Bur eau of Air Quality Planning at 901 South Stewart Street, Suite 4001, Carson City, Ne vada 89701 or by telephone at 775-687-9349 for assis t ance.


## ACKNOWLEDGEMENTS

This document was written by the following staff of NDEP, Bureaus of Air Quality Planning and Air Pollutio n Control: Principal A u thors Frank Forsgren Brenda Harpring Valerie Kauffman Adele Malone, Supervisor

Contributing Staff Matth ew DeBurle

Paul W illia m s And other staff

Review ers Michael Elges, Chief, Bureau Air Q u ality Planning

Greg Re m e r, Chief, Bureau Air Pollution Control

The supporting technical inform ation in this pl an was assem b led with the assistance of the WRAP staff, m e m b er states and their consultant s, the W e stern Governor’s Association, and the Western States Air Resources Council. In addition, NV Energy, Southe rn California Edison and Nevada Cem e nt provided BART analyses for th eir sou r ces.

## EXECUTIVE S U MMARY

REGUL A T O RY HISTORY

In 1977, Congress am ended the Clean Air Act (C AA) establishing a national goal to protect visibility in Class I f e der a l ar eas -

- n a ti onal parks, forests and wilderness areas. The

am endm ents called for th e “preven tio n of a ny fut u re, and the rem e dying of any existing, im pair m e nt of visibility in m a ndatory class I Fed e ral area s which im pair m e nt results f r om

m a nmade air pollution.” (CAA § 169A) In 1979, the United States Environm ental Protection Agency (USEPA), in consultation w ith the S ecretary of Interior, prom ulgated a list of 156

m a ndatory Class I areas in which visibility was dete rm ined to be an im portant factor. In Nevada, only one area was designated: the Jarbidge W ilderness Area (Jarbidge W A ) in the northeast corner of the state.

On Dece m b er 2, 1980, USEPA promulgated regulations to address visibility im pairm e nt that is “reasonably attributable” to a single source or sm all group of sources. These regulations represented the first phase in addressing visibility im pair m e nt; action on regional haze was deferred. In 1990, the act was am ended to requ ir e that regional haze i ssues be addressed. Subsequently, USEPA a dopted phase II visib ility rules, o r th e Regional Haze Rule (RHR), thereby establishing a comprehens ive visibility protection progra m for Class I federa l a r eas.

The intent of the RHR is to im prove visibility ov er the next 55 years in all 156 m a nda tory Class I areas across the country. It requ ires each affected state to de velop and adopt an im plem entation plan that will im prove the haziest days and prot ect the clearest days at each m a ndatory Class I area in the state with a goal of returning to natural vi sibility conditions by the year 2064. Each plan m u st provide a com p rehensiv e analysis of natural and m a n-m a de sources of haze in each

m a ndatory Class I area in the state and contain st rategies to control anth ropogenic em issions that contribute to haze. The plan m u st also addre ss the transpo r t of haze acro ss state boun daries. This document is Nevada’s Regional Haze State Implementation Plan (R H SIP) and has been prepared to m eet the req u irem ents of the federa l RHR as codified in Title 40 of the Code of Federal Regulations (CF R ) Part 51 S ection 308.

REGIONAL HAZE S T ATE IMPLEMEN TATION PLAN REQUIREMENTS

The RHR covers a long period, broken into seve ral planning phases to ultim a tely m e e t the national visibility goal by the year 2064. The appro ach taken in preparing this RH SIP is to set the initial planning period (2008 through 2018) as the “foundational plan” for the subsequent planning periods. Though national visi bility goals are to be achiev ed by the year 2064, this plan

m eets the requirem e nts of i m proving visibility for the m o st impaired days and ensuring no degradation in visibility for the least im pair ed days for the period ending in 2018, the first planning period in the federal rule.

Nevada’s RH SIP has been prepared by the Ne vada Division of Environm ental Protection (NDEP) and contain s strategies and elem ents rela ted to each requirem e nt of the federal rule. The SIP is based on data that existed as of January 5, 2009 with one exception. In response to public

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 icomments, Nevada re-evaluated the Best Availa ble Retrofit Technology (B ART) e m ission lim its for SO 2 at NV Energy’s Reid Gardner facility. T h e lim its were lowered based on 2009 data.

The appendices at the end of this docum ent provide additiona l inform ation, including new Nevada Adm i nistrative Code (NAC) associated with this plan and evidence of public participation, along with public com m e nts and ND EP responses to those comments. Technical support docum ents and reference m a terial (techn ical analyses and repo rts) prepared by the Western Regional Air Partne rship (WRAP), the Regional Planning Organization (RP O ) designated b y USEPA to assis t western states in the develop m ent of regional haze p l ans, and other sources are linked in the text to the web site where they are publicly available.

A brief summ ary, organized acco rdin g to the regional haze p r ogram requirem e nts in 40 CFR 51.308, of how Nevada has fulfilled the requ irem ents of the R H R for the first p l ann i ng period and how Nevada intends to f u lf ill f u ture requ ire m ents f o llows.

Reasonable Progress Goals and Calculations of Baseline and Natural Visibility C o nditions

The RHR at 40 CFR 51.308(d)(1 ) requires the state, for each m a ndatory Class I area within th e state, to es ta blish r eason able prog res s goals th at will ach ieve the national goal of a return to natural visibility conditions by 2064. 40 CFR 51.308(d)(2) requires the state to calculate baseline, current and natural visib ility conditions, which in turn ar e used to calculate the uniform rate of progress (URP) per year necessary to achieve natural conditions by 2064. States are directed to s how graphically what w ould be th e URP for each m a ndatory Cl ass I area within th e state. To develop the U R P, or glidepath, states must determ ine base line visibility conditions for the period 2000 through 2004 and natural b ackground visibility conditions in 2064.

Visibility co nditions and the glid epath for the Jarbidge WA are presented in Chapter T w o. The baseline visibility condition for the period 2000 through 2004 for the 20 percent worst days is 12.07 deciviews (dv) and 2.56 dv for the 20 percent be st days. The natural background visibility condition at Jarbidge is estim at ed to be 7.87 dv for the 20 percent worst days and 1.14 dv for the 20 percent best days. The URP value for the pl anning period ending in 20 18 for Jarbidge W A is 11.09 dv.

Analysis of baseline period m onitoring data at Jarbidge W A s hows that organic m a tter carbon (OMC) and elem ental carbon (EC) extinction acc ount for more than 45 percent of the total
average ann u al reconstructed ex tin ction for the 20 percent worst days . Coarse and fine particle

m a ss (CM a nd SOIL) extinction account for an a ddition a l 30 percen t. Approxim a tely 20 percen t of the annual extinction budget results from the form ation of ammonium sulfate (sulfate) and ammonium nitr ate (nitra te) due to em issions of sulfur oxides (SO x ) and nitrogen oxides (NO x ) from predom inantly anthropogenic sources. Based on these findings, NDEP concludes that windblown dust and natural fire em issions contribute significantly to visibili ty im pairm e nt at the Jarbidge W A . The data suggest that visibility im provem e nt due to em issions reductions of SO x and NO x from anthropogenic sour ces m a y be overwhelm ed by em issions from natural sources, in particular seasonally variable OMC a nd CM, as well as EC and SOIL.

Visibility m odeling was used to determ ine the expected 2018 visibility im provem e nts resulting

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 iifrom existing federal and state air quality regu lations in effect by 2018. This m odeling included a lim ited ass e ssm ent of the im pacts of applying BART to BART-eligib le coal-f ired electr ic generating units to achieve the presum ptive lim its for sulfur dioxide (SO 2 ). The m o deling results are presented in Chapter Four. Modeling shows that as a result of regulatory requirem ents at the local, sta t e a nd f e deral le vels dur ing the planni ng period of this SIP, em ission reduc tio ns will result in greater visibility im prove ment than the URP value fo r the Jarbidge W A in 2018.

The dem ons tration of reasonable progress requires setting goals for the 20 percent worst and the 20 percent best days in each Class I area, ba sed on an evaluation of how BART and other regiona l haz e stra teg i es will r e duce em issions and im prove or prote c t v i sibility. Ch apter S i x of this plan describes the reasonable progress dem onstr ation in detail. Nevada has determined that im ple m entation of BART and the federal, state a nd local program s included in the 2018 visibility modeling represents reasonable progress in Nevada for the initial regional haze planning period. Nevada actu a lly ex ceeds URP requirem e nts for the Jarbidg e WA in 2018 and m eets its share of

em ission reduction obligations at out-of-state Class I areas. It is not necessary to consider additional em ission controls on non-BART Nevada s ources at this tim e. It is appropriate to evalua te add ition a l r e duc tions in the f u ture f o r later plann i ng periods in or der to sus t a i n a consistent glidepath toward the 2064 goal.

Long-term Strategy for Regional Haz e
The RHR at 40 CFR 51.308(d)(3) requi res the state to subm i t a long -term strategy that addresses regional haze visibility impairm ent at all m a nda tory Class I areas that m a y be im pacted by

em issions from the state. The strateg y m u st inclu d e enforceable em ission s lim itation s , com p liance schedules and other m easures as nece ssary to achieve the state’s reasonable progress goals. As part of the technical basis for the long-term strategy, the state must identify its baseline em issions inventory and all anthropogenic sources of visi bility im pairm e nt. This SIP covers long-term strategies for visibility im prove m e nt between baseline c onditions and visibility conditions projected for 2018.

Chapter Three describes Nevada ’s baseline and 2018 em issions inventories and analyzes the sources of visibility im pa irm e nt by source categor y. Total em issions for all visibility im pairing pollutants in 2018 are projected to be 1,336,811 tons. Of that total, 27 percent are from anthropogenic sources; 73 percent are from natura l sources. Em issions from natural sources are considered uncontrollable. Of the eight visibi lity im pairing pollutant s analyzed, anthropogenic sources are important contribu tors to three of the m : SO x , NO x, and NH 3 . SO x e m issio n s in Nevada come predom inantly from point and ar ea sources, 61 and 31 percen t, respectively. NO x em issions com e predominantly from point sour ces, approxim a tely 50 percent; m obile sources account for another 27 percent. NH 3 em issions com e predominantly from area sources, 59 percent, with another 23 percent from on-road mobile sources. Volatile organic compounds (VOC), prim ary organic aerosol (P OA), EC, PM fi ne and PM coarse em i ssions are dom i nated by natural source categories, and those sour ce categories are not controllable.

Chapter Four presents the results of visibili ty and source apportionm ent modeling, which show that the Jarbidge WA wi ll m eet the URP value for 2018. The m odeling results and technical analyses indicate that, although Nevada sources contribute to visibility im pairm e nt at the

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 iiiJarbidge W A and Class I areas located in adjace nt states, sources outside the State of Nevada have the g r eates t im pact on regional haze at Ja rb idge W A . Furtherm ore, regional weighted

em issions potential analyses show the signifi cant role of em issions from windblown dust, f ugitive dus t and natur a l f i re in visibi lity im pairment at the Ja r b idge W A

.

The 2018 Particulate Matter Source Attribution Tracking m odeling de m onstrates that “Outside Dom a in,” or boundary conditions, em issions comprise alm o st 44 percent of the total sulfate at Jarbidge W A -- four tim e s greater than any other regional source. Nevada’s contribution is less than six percent. Sulfur oxide em issions from poi nt, area and natural fire sources each contribute approxim a tely one third to visibil ity impairm ent at Jarb idge W A . For nitra t e, Idaho is the larg est regional source contributor; abou t 30 percent. Nevada contribu tes approxim ately 13 percent. Point, m obile and area source em issions contribu te the m o st to nitrate, with a m u ch smaller portion from natural fire em issions.

Nevada evaluated its contribution to visibility im pairm e nt at Cl ass I areas in adjacent states: Arizona, California, Idaho, Oregon and Utah. Nevada calculated the visibili ty reductions needed at these Class I areas to achiev e the 2018 URP; the pe rcentage of the need ed reduction achieved; Nevada’s em issions reduction share; the contributi on of Nevada em issions to sulfate and nitrate extinction; the percentage change in Nevada ’s em issions from baseline to 2018; and the percentage change in Nevada’s weighted em ission potential f r om baseline to 2018. T h e percentage of Nevada’s state- wide em issions reductions exceed s the percentage of Nevada’s
contr i bution to visib i lity im pairm e nt at all im pact ed Class I areas. Theref ore, the s t ate m eets its share of em ission redu ction obligatio ns necessa ry for achievin g reasonab l e progress in each

m a ndatory Class I area it affects.

Nevada’s long-term strategy is presented in Ch ap ter Seven an d com p rises all of the “o n-theway” and “on the books” control program s and federa l, state and local rules discussed in Chapter Six together with additional control program s discussed in Chapter Seven and the BART requirem e nts found in Chapter F i ve. In develo ping this strategy, Nevada considered ongoing
contro l prog ram s , m easures to m itiga t e cons truc tion activ ities, source retirem e nt and replacem ent schedules, s m oke m a nagem e nt techniques for a g ri cu lture an d forestry an d enforceability of specific m easures as requ ired by 40 CFR 51.308(d)(3).

Nevada has num e rous existing em ission control program s to im prove and protect visibility in Class I areas. Generally, Nevada considers its New Source Review (NSR) and Prevention of Significant Deterioration (PSD) program s m eet the long-term strategy requirem e nts for preventing future visibility im pairm e nt from proposed m a jor stationary sources or m a jor modif i cation s to exis ting f acilities. N e vada’s continued im plem entation of NSR requirem e nts, with FLM in volvem e nt for Class I ar ea im pact re vi ew, will p r otect the lea s t im paired days f r om f u rther deg r adation and will assu re that no Clas s I are a s with a potential to be im pacted by Nevada em i ssions will experience degradation fro m a new source or a m a jor m odification of an existing sou r ce.
As noted above, for the planning period of this S I P, visibility m odeling shows that em ission reductions resulting from the im plem entation of regulatory requirem e nts at the local, state and f

e deral levels will prov id e grea ter v i s i bility im provem ent than the URP f o r the Jarb idge W A in

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 iv2018. Furtherm ore, Nevada is m eeting its share of e m ission reduction obligations at m a ndatory Class I areas that it affects in neighboring states. The RHR re quires an evaluation every five years of reasonable further progre ss. Nevada will evaluate r easonable further progress for the Jarbidge W A on this schedule and, if necessary, revise its lo ng-term strategy as app r opriate.

Monitoring Strategy, E m ission Inve ntory, Recordkeeping and Reporting

The RHR at 40 CFR 51.308(d)(4) requires the st ate to develop a m onitoring strategy for

m easuring, characterizin g and repor ting regional haze visibility im pair m e nt that is rep r esentative of all m a nda tory Class I areas within Nevada. This strategy must also coordinate with the monitoring strategy required in 40 CFR 51.305 for r easonably attributable vi sibility im pairm e nt, as well as provide for a variety of other requir em ents design ed to evalu a te reasonab l e p r ogress toward m eeting national visibility goals.

Nevada’s monitoring strategy is presented in Chap ter Eigh t. Visibility co nditions in m a ndatory Class I areas throughout the United S t ates are pr esently m easured by the Interagency Monitoring of Protected Visual Environm ents (IMPROVE ) monitoring network, wh ich is operated and

m a intained through a form al cooperative re lationship between USEPA and Federal Land Manager (FLM) agencies. Nevada’s regional haze m onitoring strategy relies on inform ation generated through the IMPROVE network for the Class I area at the Jarbidge WA. Nevada

comm its to continue using the IMP R OVE moni to ring data and to update Nevada’s em issions invento r y periodically, as required b y the RHR. The invento r y updates w ill b e used for state tracking of em ission changes and trends, to pr ovide input into the evaluation of whether reasonab l e p r ogress go als will con tin ue to be ach ieved at J a rbidge W A and f o r other r e gional analyses.

40 CFR 51.305 requires states to develop a stra tegy for m o nitoring reasonably attributable visibility im pairm e nt in its Class I areas. To sa tisf y this requ irem ent, Nevada is sub j ect to a f

e deral visib ility pro t ection plan (v isibility FIP). Nevada’s regiona l haze monitoring strategy will coo r din a te with Nev a da’s visib i lity FIP by c ontinuing to use the da ta colle cted by the IMPROVE program and will prom ote reason able progress to ward the na tional v i sib ility goal.

The RHR at 40 CFR 51.308(d)(4)(v) requires a stat ewide em ission inventory of pollutants that are reasonably anticipated to cause or contribute to visibility impairm ent in any m a nda tory Class I area. Several em ission invent ories were prepared by the Re gional Modeling Center for the WRAP as part of the regional ha ze effort. Chapters One and Three dis c u ss the developm ent of these inventories and the baseline and projected em issions for SO x (particulate and gaseous phases), SO 2 (gas phase only), NO x , VOC, POA, EC, PM fine , PM coarse and NH 3 in Nevada.

Nevada comm its to continue developing em ission inventory data to allo w for tracking em ission increases or decreases as relate d to regional haze as funding and resources allow. Inform ation collected will be m a de availab l e periodically, as required by the RHR.

Best Achievable Retrofit Technology

The RHR at 40 CFR 51.308(e) requi res states to determ ine BART and compliance schedules for

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 veach BART-elig ible sou r ce in th e state that em its any air po llu tant that m a y reasonab l y be anticipated to cause or contribute to im pair m e nt of visibil ity in any m a ndatory Class I federal area. Section 169A(b) of the CAA defines BART -eligible sources as sources in 26 specific source categories, in operation with in a 15-year period prior to en actm ent of the 1977 PSD rules. States m u st determ ine BART according to five f actors set ou t in section 169A(g)(2) of the CAA. Em ission lim itations representing B A RT and sc hedules for com p liance with BART for each source subject to BART must be include d in the state’s long-term strategy.

Nevada’s RH SIP fulfills the requ irem ents of 40 CFR 51.308 (e)(1 ); Chapter Fiv e describes the BART determ ination in detail. The BART anal yses conducted by Nevada were based, in part,

on an assessm e nt of many of th e same factors (including the 4-fa ctor analysis) that m u st be addressed in establishing the re asonable progress goal. Four f acilities, comprising 10 units, are subject to B A RT: NV Energy’s generating stations at Tracy (units 1, 2 and 3), Ft. Churchill (units 1 and 2) and Reid Gardne r (units 1, 2 and 3); and Southern California Edison’s generating station at Mohave 1 (units 1 and 2). The control re quirem e nts imposed by Nevada’s BART determ inatio ns satisf y the reason able progress goal-related require m e nts for source review in the first planning period.

A substantial reduction in NO x , SO 2 and PM 10 em issions are anticipated upon installation of Nevada BART controls. Em issi ons reductions resulting from th e installation and operation of BART at these sources are estim a te d to be greater than 20,000 tpy for NO x , greater than 40,000 tpy for SO 2 and greater than 4,000 tpy for PM 10 . Nevada will not requ ire n on-BART sources to install and operate new em issions controls in the first planning period of the RHR.

Periodic Revisions and Report s; Adequacy Determination

The RHR at 40 CFR 51.308(f)-(h) requires RH SIP re vis i ons every ten years, repo rts describ i ng progress to wards the s t ate’s reason able progress goals every five years and a determ ination of the adequacy of the SIP along with the five year repo rts. In Chapter Nine, Nevada comm i t s to fulfill each of these requirem e nts and each of the elem ents th erein, as funding and resources allow.

State and Federal Land Manager Coordination

The RHR at 40 CFR 51.308(d)(1)(iv) and (d)(3)(i) requ ires states to coordinate with other states during the developm ent of reasonable progress goals and em ission m a nagem e nt strategies. Nevada has m e t these requirem e nts through particip ation in the W R AP and comm its to continue to coordinate via the WRAP or other m eans in Chapter Nine. In the W R AP process, Nevada participated in various forum s and workgroups to help develop a coordinated em issions inventory and analysis of the im pacts that sources have on regional haze in the west. Coordination and evaluation of m oni toring data and m odeling processes were also overseen by WRAP participants. Although not a for m al m e mber , Nevada has been an active participant in

1 On Ju n e 10, 20 09 , after th e cu toff d a te for i n corp oratin g new info rm atio n in to t h is SIP (Janu a ry 5

, 20 09 ), th e

ow ne rs of t h e M oha ve Ge ner a t i ng St at i o n a n n o unce d t h e d eci si on t o deco m m i ssi on t h e s t at i on an d rem ove t h e gene rating facility from the site. This ne w i n form ation is noted at releva nt places in the SIP, but t h e SIP has not been re vised to incorpor ate thi s inform ation.

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 vithe W R AP since its in ception, and in the forum s , workgroups and comm ittees that were for m ed to address many elem ents of the SIP.

40 CFR 51.308(i) further requires st ates to coordinate with F L Ms in developing the RH SIP. States m u st provide a contact to w hom FLMs can subm it recommendations on the im ple m entation of the RHR; provide FLMs an opport unity for consultation at least 60 days prior to holding any public hearing on th e SIP; provide a public record of how the state addressed any FLM comments; and provide pr ocedures for continuing consultation with FLMs on the im ple m entation of the state’s RH SIP.

Chapter Nine describes Nevada’s coordination and consultation w ith FL Ms for this SIP and our

comm it m e nt to continued coordination. Again, pa rticipation in the W R AP fulfills a significant portion of the consultation requirem e nts with FL Ms. This included an opportunity to discuss their asses s m ent of visibility im pair m e nt at th e Jarbidge W A and to provide recomm e ndations on reasonable progress goals and the developm ent and im ple m e n tation of visibility control strategies. A draft of Nevada’s RH SIP wa s provided to the FLMs with a 60-day comment period prior to the public heari ng on the SIP. FLM comm ent s and Nevada’s responses are found in Appendix C. Additio nal FLM co mments and other pub lic comments on the RH SIP subm itted during the public comment period are included in Appendix D, together with NDEP’s responses.

Nevada comm its to continued participation wi th the W R AP as long as it exists and to coordinating future plan revis i ons with other st ates in address i ng reg i onal haze. Invo lvem ent with the W R AP will contribute sign if icantly to N e vada’s inte r-state coord i nation f o r f u ture SIP revisions and progress reports.

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 viiNEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 viii

## CONTENTS

PREFACE

EXECUTI V E S U MMARY ..............

........................ ................. ................. ............. i

ACRONYMS, ABBREVIATI ONS AND TERMS

............. ..................... .............. x i

LIST OF TABLES ........

.................... ........................ ................. ................. ......... xiv

LIST OF FIGURES ................

........................ ....................... ................... ............ xvi

CHAPTER ONE: OVERVIEW

1.1 Nevada’s Class I Area – Jarb idge W ilderness Area

............................................... 1-2 1.2 The W e stern Regional Air Partne rship (W RAP) and Nevada

.............................. 1-15 1.3 Technical Support Background

............................................................................. 1-16 1.4 References

............................................................................................................ 1-32



### CHAPTER TWO: BASELINE AND NATURAL VISIBILIT Y CONDITIONS AND UNI F ORM RATE OF P R OGRES S

2.1 Introduction

.............................................................................................................. 2 -2 2.2 Baseline Conditions for the Jarbidge W ilderness Area

........................................... 2-3 2.3 Natural Con d itions for the Jarbidg e W ilderness Area

............................................ 2-3 2.4 Unifor m Rate of Progres s Glidepat h to Natural C onditions in 2064

...................... 2-6 2.5 Haze Im pacting Particles – Baseline Period

........................................................... 2-7 2.6 References

............................................................................................................. 2-2 2



### CHAPTER THREE: SOURCES OF IMPAIRMENT I N NEVADA

3.1 Background

............................................................................................................. 3-2 3.2 Sources of Visibility Impairm e nt

............................................................................. 3-3 3.3 Developm ent of the 2002 And 2018 Em ission Inventories

.................................... 3-4 3.4 Point Source Em ission Inventory

............................................................................. 3-5 3.5 Fire Em ission Inventory

......................................................................................... 3-11 3.6 Area Source Em ission Inventory

........................................................................... 3-12 3.7 Overview of Em ission Inventory System – TSS

................................................... 3-12 3.8 Em issions in Nevada

............................................................................................. 3-13 3.9 Summ ary of 2018 Em ission Projections

............................................................... 3-40

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 ix

## CONTENTS - Co ntinue d

CHAPTER FOUR: VISIBILITY AND SOURCE APPORTIONMENT MODELING

4.1 Introduction

.............................................................................................................. 4 -2 4.2 Visibility Modeling Results for 2018

...................................................................... 4-5 4.3 Source Apportionm ent Modeling R e sults

............................................................... 4-9 4.4 Weighted Em issions Potential Analyses Results

................................................... 4-20 4.5 Visibility and Source Apporti onm ent Modeling S u mm ary

.................................. 4-30



### CHAPTER FIVE: BEST AVAIL ABLE RETROFIT TECHNOLOGY

5.1 Overview of the BART Process

............................................................................... 5-2 5.2 BART Eligible Sources In Nevada

.......................................................................... 5-2 5.3 Exem ption Modeling S e tup and Analysis

............................................................... 5-4 5.4 Summ ary of BART Exemp tion Modeling Results

................................................. 5-6 5.5 Summ ary of BART Control Analysis

..................................................................... 5-8 5.6 Visibility Im provem e nt Due to BART I m plem entation

........................................ 5-16



### CHAPTER SIX: REASONABLE PROGRESS FOR THE JARBIDGE WILDERNESS AREA

6.1 Introduction

............................................................................................................. 6 -2 6.2 Steps for Developing Reasonable Progress Goals ................................................... 6-3 6.3 Establishing Bas e line and Natural Visib ility Condition s

........................................ 6-3 6.4 Determ ining the Unifor m Rate of Progress

............................................................. 6-3 6.5 Identifying the Measures to Achieve the Uniform Rate of Progress ....................... 6-4 6.6 Establishing Reasonable Progress for Nevada

...................................................... 6-14 6.7 De monstration that the RP G for W o rst Da ys is Reasonable

................................. 6-16 6.8 Refe rences

........................................................................................................... ... 6-24



### CHAPTER SEVEN: LONG TE RM S T RATEGY FOR NEVADA

7.1 Long-Term Strategy Overview

............................................................................... 7-2 7.2 BART Controls

....................................................................................................... 7-3 7.3 Visibility Improvem e nt

........................................................................................... 7-4 7.4 Mitig ation o f Construction Im pacts

........................................................................ 7-5 7.5 Em issions L i m itations and Schedules of Com p liance

............................................ 7-6 7.6 Source Retirem e nt and Replacem ent Schedules

..................................................... 7-7 7.7 Sm oke Managem e nt Program

................................................................................. 7-7 7.8 Enforceability of Em ission Lim its

.......................................................................... 7-9 7.9 Long-Term Strategy

................................................................................................ 7-9

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 x

## CONTENTS - Co ntinue d

7.10 Reasonable Progress Assessm ent

......................................................................... 7-26



### CHAPTER EI GHT: MONITORING S T RATEGY

8.1 Introduction .............................................................................................................8 -2 8.2 Nevada’s Regional Haze Visibi lity Monitoring Strategy

...................................... 8-2 8.3 Coordination with §51.305 Monitoring Strategy Requirem e nt

............................... 8-3 8.4 Associated Regional Haze Monito ring Strategy Requirem e nts

............................. 8-3 8.5 Overview of Im prove Site at Jarbidge

.................................................................... 8-5 8.6 Comm it m e nt to Future Monitoring

........................................................................ 8-5



### CHAPTER NI NE: CO ORDINATION, FUTURE COMMITMENTS AND REQUIREMENTS

9.1 Plan Developm ent

................................................................................................... 9-2 9.2 Future Coordination and Cons ultation Comm it ments

............................................ 9-4 9.3 Comm it m e nt to Progress Reports

........................................................................... 9-5 9.4 Determ ination of Current Plan Adequacy

............................................................... 9-5 9.5 Comm it m e nt to Future S I P Revisions

.................................................................... 9-6



### APPENDIX A: Neva da BART Regulation

APPENDIX B: BA RT Determ ination Support Docum e nts

APPENDIX C: Federal Land Management Agency Comments and Nevada’s Response

APPENDIX D: Evidence of Public Par ticipation; Public Co mments and Nevada’s Responses

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 xi

## Acronyms, Abbreviations and Terms

Anthropogenic Caused or produced by hum a ns B A C T B e s t Availabl e Control Technology
B A R T B e s t Available Retrofit Technology
Base02 2002 actual baseline em issions
Base18 2018 base case em issions
CAA Clean Air Act
CAIR Clean Air In ters tate Rule
CAMD Clean Air M a rkets Div i s i on CAM x Com p rehensive Air Quality Mode l with Exten s io ns CENRAP Central Regional Air Planning Association
CFR Code of Federal Regulations
CIRA Cooperative Institute for Research in the Atm o sphere
C M C o a r s e m a t t e r CMAQ Community Multi-Sca le Air Quality model
C O C a r b o n m o n o x i d e COHA Causes of Haze Assessm ent
d v D e c i v i e w ; a m easure of light extinction
E C E l e m e n t a l c a r b o n EDMS Em issions Data Managem e nt System
EGAS Econom ic Growth Analysis System
EGU Electric generating unit
E I E m i s s i o n s I n v e n t o r y EIA Energy Inform ation Adm i nistration
FETS Fire Em issions Tracking System
FGR Flue gas recirculation
FIP Federal Im p l em entation Plan
FLM Federal Land Manager Glidepath The linear rate of im provem ent sufficient to atta in natural conditions by 2064
H I H a z e i n d e x IMPROVE Interagency Monitoring of Protected Visual Environm ents
IWG Im ple m entation W o rk Gr oup J A R B 1 I M P R O V E monitoring s ite at Jarbidge W ilderness Area
lb/MMBtu Pounds per m illion British therm a l units

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 xiiL N B L o w NO X Burners
LTS Long term strategy
M A C T M a x i m u m Achievable Control T e c h n o l o g y Mm -1 Inverse m e ga m e ter; a meas ure of particle extinction
MM5 Meteoro l ogical Meso scale 5
MW M e g a w a t t
N A C N e v a d a Adm i n i s t r a t i v e C o d e NDEP Nevada Division of Environm ental Protection
N E I N a t i o n a l Em i s s i o n I n v e n t o r y NH 3 Ammonia
N M H C N o n

- M e t h a n e H y d r o c a r b o n s NOAA National Oceanic and A tmospheric Adm i nistration
NO 3 Ammonium nitrate or NH 4 NO 3 NO x Nitrogen oxides
NSR New source review
NTEC National T r ibal Environ m ental Council
O 3 Ozone
OMC Organic m a tter carbon
Plan02 2000 through 2004 typical baseline em issions
P M P a r t i c u l a t e m a t t e r PNG Pipeline natural gas
POA Prim ary organic aerosol

ppm Parts pe r m illion
PRP Prelim inary Reasonable Progress
PRP18 2018 Prelim inary Reasonable Progress Em issions
P S A T P a r t i c u l a t e Matter S ource Attribution Tracking
PSD Prevention of signi f i cant deter i ora tion
RHR Regional Haze Rule
RMC WRAP’s Regional Modeling Center
ROFA Rotating over fire air
R P G R e a s o n a b l e p r o g r e s s g o a l
RPO Regional Planning Organization
RRF Relative Response Factors
SCC Source Classification Code
S I P S t a t e im plem e n t a t i o n p l a n

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 xiiiSNCR Selective non-catalytic reduction
S O A S e c o n d a r y o r g a n i c a e r o s o l s S O I L F i n e s o i l
SO 2 Sulfur dioxide
SO 4 Ammonium Sulfate or (NH 4 ) 2 SO 4 SO x Sulfur oxides
TSS Technical Support System
TSSA Tagged Species Source Apportionment
URP Unifor m rate of progress
USEPA United States Environm ental Protection Agency
VOC Volatile organic com pound
W A W i l d e r n e s s A r e a WEP Weighted em issions potential
WESTAR Western States Air Resources Council
W G A W e s t e r n Gover nor’s Association
WRAP Western Regional Air Partnership

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 xiv

## List of T abl es

CHAP TER ONE Table 1-1 WRAP CAM x /PSAT Source Regions Table 1-2 WRAP CAM x /PSAT Em issions Source Groups

CHAP TER T W O Table 2-1 Unifor m Rate of Progress for the Jarbidge W ilderness Area Table 2-2 Monitored Contributions to Annua l Reconstructed Extinction by Species for Baseline Pe r i od

CHAPTER THREE Table 3-1 Summ ary of Pollutants, Source Categories, and Source Areas Table 3-2 Summ ary of Anthropogenic and Natural Em ission Sources in Nevada Table 3-3 Summ ary of SO 2 and NO x Em issions from Neva da Point Sources for the Baseline Period Table 3-4 Summ ary of SO x and NO x Em issions from Neva da Point Sources for 2018 Table 3-5 Proposed 2018 EGUs and Current Perm it Activity Table 3-6 Em issions Summ ary Table for Nevada for 2002 and 2018: Natural vs. Anthropogenic Sources Table 3-7 Nevada SO x Em issions by Source Category for 2002 and 2018 Table 3-8 Nevada NO x Em issions by Source Category for 2002 and 2018 Table 3-9 Nevada VOC Em issions by Source Category for 2002 and 2018 Table 3-10 Nevada POA Em issions by Source Category for 2002 and 2018 Table 3-11 Nevada EC Em issions by Source Category for 2002 and 2018 Table 3-12 Nevada PM Fine Em i ssions by Source Category for 2002 and 2018 Table 3-13 Nevada PM Coarse Em i ssions by Source Category for 2002 and 2018 Table 3-14 Nevada NH 3 Em issions by Source Category for 2002 and 2018 Table 3-15 Predom inant Sources for Pollutants: 2018

CHAP TER FOUR Table 4-1 Summ ary of Model-Predicted P r ogr ess toward 2018 Unifor m Rate of Progress Goal at JARB1 Table 4-2 Summ ary of Model Predicted P r ogr ess toward Species-Specif i c 2018 W o r s t Days URP at JARB1 Table 4-3 Nevada’s Sulfate Extinction Contri bution to Class I Areas Outside of Nevada Table 4-4 Nevada’s Nitrate Extinction Contribu tion to Class I Areas Outside of Nevada Table 4-5 Summ ary of 2018 Model Results for Jarbidge W ilderness Area Table 4-6 Change in Worst Days Modeled Co ncentr ation s of Sulf ate and Nitra t e

CHAP TER FIVE Table 5-1 BART-Eligible Sources in Nevada Table 5-2 BART Exemption Modeling Re sults – Sources Subject to BART Table 5-3 BART Modeling Results – BART Exem pt Sources

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 xvTable 5-4 Tracy BART Em issions Reductions in Tons per Year Table 5-5 Fort Church ill BART Em issi ons Reductions in Tons per Year Table 5-6 Reid Gardner BART Emissi ons Reductions in Tons per Year Table 5-7 Mohave BART Em issions Reductions in Tons per Year Table 5-8 Com p arison of Exe m ption Mode ling Em ission Rates, NV Energy Modeled Em ission Rates and BART Em ission Lim its Table 5-9 Tracy Pre-BART and Post-BART Control Mode led Visibility Results Table 5-10 Fort Church ill Pr e-BART and Post

- B ART Control Mode led Visibility R e sults Table 5-11 Reid Gardner Pre-BART and Post -B ART Control Modeled Visibility Results Table 5-12 Mohave Pre

- BART and Post-B ART Control Mo deled Vis i bility Resu lts

CHAP TER SIX Table 6-1 Monitored Contributions to Av erage Annual Reconstructed E x tinction for Baseline Pe r i od Table 6-2 Nonattainm e nt Area Redesigna tion Status as of Septem ber 22, 2008 Table 6-3 Summ ary of Model Pr edicted P r ogress toward 2018 Un ifor m Rate of Progress at JARB1 Table 6-4 Large Natural Fires near the Jarbidge W ild erness Area 1999-2008

CHAP TER SEVEN Table 7-1 Additional Annual Em i ssions Reducti ons in Tons Resulting from I m plem entation of BART in Nevada Table 7-2 Summ ary of Nevada An thropogenic and Natural Em issions Table 7-3 Nevada’s E x tinction Cont ribution and Em issions by Species Table 7-4 Nevada Em i ssions S ource Contributions by Species Table 7-5 Summ ary of SO 2 and NO x Em issions from Neva da Point Sources for 2018 Table 7-6 Summ ary of Visibi lity Impairm e nt at Nearby Class I Areas and Nevada’s Em issions Reductions Table 7-7 Baseline and Projected SO 2 Inventories by State

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 xvi

## List of Fi gures

CHAP TER ONE Figure 1-1 Location Map Showing Mandatory Class 1 Areas in the W R AP Region Figure 1-2 Location Map of Nevada a nd Portions of Adjacent States Figure 1-3 Extent of Pleisto cene Lakes in th e Great Bas i n Figure 1-4 Location Map of Snake River Plain Figure 1-5 Jarbidge W ilder ness Area and Vicinity Figure 1-6 August 2008 Dust Event Near Mill City Nevada Figure 1-7 Source Area for Observed Dust Event Figure 1-8 August 2008 Convective Dust Event Near Mill City, Nevada Figure 1-9 Observed July 2008 Lake Tahoe Smoke Event Figure 1-10 Septem ber 2007 Regional Sm oke Eve n t Eastern Nevada Figure 1-11 Map of IMPROVE Monito ring Netw ork in the United States Figure 1-12 Light Extinction-Ha ze Index-Visual Range Scale

CHAP TER T W O Figure 2-1 Reference Vista of the Jarbidge W ilderness Area for Baseline Best Days Figure 2-2 Reference Vista of the Jarbidge W ilderness Are a f o r Baseline W o rst Days Figure 2-3 Reference Vista of the Jarbidge W ilderness Are a f o r Natural Conditions Best Days Figure 2-4 Reference Vista of the Jarbidge W ilderness Are a f o r Natural Conditions W o rst Days Figure 2-5 Unifor m Rate of Progress Glid epath for the Jarb idge W ildern e ss Area Figure 2-6 Annual Reconstructed E x tinction for W o rst Days of the Baseline Period Figure 2-7 Annual Reconstructed E x tinction by Species for Worst Days of Baseline Period Figure 2-8 Monthly Distribution of Worst Days of Baseline Period Figure 2-9 Daily Recon s truc ted Lig h t Extinc tio n f o r W o rst Days of Bas e line Period Figure 2-10 Annual Reconstructed E x tinc tion for Best Days of Baseline P e riod Figure 2-11 Annual Reconstructed E x tinction by Species for Best Days of Baseline P e riod Figure 2-12 Monthly Distribution of Best Days of Baseline P e riod Figure 2-13 Daily Reconstructed Light Extin ction for Best Days of Baseline Period Figure 2-14 Annual Reconstructed E x tinction fo r IMPROVE Sa m p le Days of Baseline Period Figure 2-15 Annual Reconstructed E x tinction by Species for IMPROVE Sam p le Days of Baseline Pe r i od Figure 2-16 Monthly Reconstr ucted Extinction for IMPROVE Sa m p le Days of Baseline Period Figure 2-17 Daily Reconstructed Extinction fo r IMPROVE Sam p le Days of Baseline Period Figure 2-18 Com p arison of Baseline Extinction for W o rst and Best Days of Baseline Period Figure 2-19 Annual IMP R OVE Reconstructed Ex tinction Trends for W o rst and Best Days Figure 2-20 Jarbidge W ilderness Area Sp eciated Extinction T r ends for Worst Days

CHAPTER THREE Figure 3-1 Percent Contribu tion by Source Category for SO x Figure 3-2 Percent Contribu tion by Source Category for NO x

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 xviiFigure 3-3 Percent Contributi on by Source Category for VOC Figure 3-4 Percent Contributi on by Source Category for POA Figure 3-5 Percent Contributi on by Source Category for EC Figure 3-6 Percent Contribution by Source Category for PM Fine Figure 3-7 Percent Contribution by Source Category for PM Coarse Figure 3-8 Percent Contribution by Source Category for Ammonia Figure 3-9 Nevada SO x Em ission Inventory – 2002 and 2018 Figure 3-10 Regional Maps of SO x Em issions for 2002 and 2018 Figure 3-11 Sulfur Oxide Em issi ons by County (Plan02d) and (PRP18a) Figure 3-12 Nevada NO X Em ission Inventory – 2002 and 2018 Figure 3-13 Regional Map of NO x Em issions for 2002 and 2018 Figure 3-14 Nitrogen Oxide Em issi ons by County (Plan02d) and (PRP18a) Figure 3-15 Nevada VOC Em ission Inventory – 2002 and 2018 Figure 3-16 Volatile Organic Carbon Em issions by County (Plan02d) and (PRP18a) Figure 3-17 Nevada POA Em ission Inventory – 2002 and 2018 Figure 3-18 Regional Maps of POA Em issions for 2002 and 2018 Figure 3-19 Prim ary Organic Aerosol Em issions by County (Plan02d) and (PRP18a) Figure 3-20 Nevada EC Em ission Inventory – 2002 and 2018 Figure 3-21 Regional Maps of EC Em issions for 2002 and 2018 Figure 3-22 Elem ental Carbon Em issions by County (Plan02d) and (PRP18a) Figure 3-23 Nevada Soil (PM Fine ) Em ission Inventory – 2002 and 2018 Figure 3-24 Regional Maps of PM Fine Em issions for 2002 and 2018 Figure 3-25 PM Fine Emissions by C ounty (Plan02d) and (P RP18a) Figure 3-26 Nevada Coarse Mass (P M Coarse) E m ission Inventory – 2002 and 2018 Figure 3-27 Regional Maps of PM Coarse Em issions for 2002 and 2018 Figure 3-28 PM Coarse Em issions by County (Plan02d) and (PRP18a) Figure 3-29 Nevada NH 3 Em ission Inventory – 2002 and 2018 Figure 3-30 Ammonia Em issions by County (Plan02d) and (PRP18a)

CHAP TER FOUR Figure 4-1 CMAQ Model Performa nce for JARB1 2002 Worst Days Figure 4-2 Relative Error of CMAQ Model Pr ediction versus IMPROVE Data for JARB1 2002 W o rst Days Figure 4-3 CMAQ Model Performa nce for JARB1 2002 Best Days Figure 4-4 Relative Error of CMAQ Model Pr ediction versus IMPROVE Data for JARB1 2002 Best Days Figure 4-5 CMAQ Model Projectio ns in Haze Index for JARB1 2018 Worst Days Figure 4-6 CMAQ Model Projections in Extin ction by Species for JARB1 2018 W o rst Days Figure 4-7 CMAQ Model Projectio ns in Haze Index for JARB1 2018 Best Days Figure 4-8 Sulfate PSAT Source Region Bar Chart for W o rst Days 2002 and 2018 Figure 4-9 Sulfate PSAT Regional Pi e Chart for W o rst Days 2002 and 2018 Figure 4-10 Sulfate PSAT Source Region Bar Chart for Best Days 2002 and 2018 Figure 4-11 Sulfate PSAT Regional Pi e Chart for Best Days 2002 and 2018 Figure 4-12 Nitrate PSAT Source Region Bar Chart for W o rst Days 2002 and 2018 Figure 4-13 Nitrate PSAT Regional Pi e Chart for W o rst Days 2002 and 2018 Figure 4-14 Nitrate PSAT Source Region Bar Chart for Best Days 2002 and 2018

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 xviiiFigure 4-15 Nitrate PSAT Regional Pi e Chart for Best Days 2002 and 2018 Figure 4-16 Sulfate PSAT Source Region Bar Ch art for Best Days 2002 and 2018 at Sawtooth W ilderness Area Figure 4-17 Sulfate PSAT Source Region Bar Chart for W o rst Days 2018 at Zion National Park Figure 4-18 Nitrate PSAT Source Region Bar Ch art for Best Days 2002 and 2018 at Joshua Tree Nation a l Park Figure 4-19 Nitrate PSAT Source Region Bar Chart for W o rst Days 2002 and 2018 at Desolation W ilderness Area Figure 4-20 Monthly Organic Aerosol PSA T Ba r Chart for Worst Days 2002 and 2018 Figure 4-21 Monthly Organic Aerosol PSA T Ba r Chart for Best Days 2002 and 2018 Figure 4-22 Organic Aerosol PSAT Bar Chart for all Days 2002 and 2018 Figure 4-23 Regional N O x W E P for 2018 W o rst Days Figure 4-24 Sources and Areas of Potential Haze-Causing NO x Em issions for JARB1 2002 and 2018 Worst Days Figure 4-25 Regional S O 2 W E P for 2018 W o rst Days Figure 4-26 Sources and Areas of Potential Haze-Causing SO 2 Em issions for JARB1 2002 and 2018 Worst Days Figure 4-27 Regional Organic Ca rbon W E P for 2018 W o rst Days Figure 4-28 Sources and Areas of Potentia l Haze-Causing Organic Carbon Em issions for JARB1 2002 and 2018 Worst Days Figure 4-29 Regional Elem ental Carbon W E P for 2018 W o rs t Days Figure 4-30 Sources and Areas of Potential Haze-Causing Elem ental Carbon Em ission s for JARB1 2002 and 2018 Worst Days Figure 4-31 Regional Particulate Ma tter Fine WEP for 2018 Worst Days Figure 4-32 Sources and Areas of Potential H aze-Causing Particu l ate Matter Fine Em issions for JARB1 2002 and 2018 W o rst Days Figure 4-33 Regional Particulate Ma tter Coarse WEP for 2018 W o rst Days Figure 4-34 Sources and Areas of Potentia l Haze-Causing Particu l ate Matter Coarse Em issions for JARB1 2002 and 2018 W o rst Days Figure 4-35 Nevada SO 2 Plan02c and Base18b Em ission Inventory Comparison Figure 4-36 Nevada SO 2 Plan02d and PRP18a Em ission Inventory Comparison Figure 4-37 Nevada NO x Plan02c and Base18b Em ission Inventory Comparison Figure 4-38 Nevada NO x Plan02d and PRP18a Em ission Inventory Comparison

CHAP TER FIVE Figure 5-1 Location of Ne vada’s BART Sources Figure 5-2 Cum u lative Pre- a nd Post BART Em i ssions Calculated from WRAP Base line Figure 5-3 Cum u lative Pre-BART and Post-B ART Em issions Calculated from NDEP Baseline

CHAP TER SIX Figure 6-1 Unifor m Rate of Progress Glidepath Figure 6-2 CMAQ Model Projected Extinctio n by Species for JARB1 2018 W o rst Days Figure 6-3 Sulfate PSAT Source Region Bar Chart for W o rst Days 2002 and 2018 Figure 6-4 Nitrate PSAT Source Region Bar Chart for W o rst Days 2002 and 2018

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 xixFigure 6-5 CMAQ Model Projectio ns in Haze Index for JARB1 2018 Worst Days Figure 6-6 Species Tim e Series Extinction for P e riod of Record at the Jarbidge W ilderness Area Figure 6-7 2006 MODIS Fire Detecti ons in California and Nevada Figure 6-8 2007 MODIS Fire Detecti ons in California and Nevada Figure 6-9 2008 MODIS Fire Detecti ons in California and Nevada

CHAP TER SEVEN Figure 7-1 CMAQ 2018 W o rst Days Model Projections for JARB1 Using Base 18b Em issions Inventory Figure 7-2 CMAQ 2018 W o rst Days Model Projections for JARB1 Using RPR18a Em issions Inventory Figure 7-3 Weighted Em ission Potential An alysis for Hells Canyon W ilderness Area Figure 7-4 Weighted Em ission Potentia l Analysis for Sawtooth W ilderness Area Figure 7-5 Weighted Em ission Potential Analy s is f o r Desolation W ilder ness Area Figure 7-6 Weighted Em ission Potential Analysis for Hoover W ilderness Area Figure 7-7 Baseline and Projected SO x Em issions by State

NEVADA REGIONAL HAZE S T ATE IM PLEMENTATI ON PLAN, October 2009 xx