## ONE-HOUR OZONE REDESIGNA TION REQUEST AN D MA INTENA NCE PLA N FOR THE MA RICOPA

COUNTY NONA

TTAINMENT A REA

MA RCH 2004

## ONE-HOUR OZONE REDESIGNA TION REQUEST AN D MA INTENA NCE PLA N FOR THE MA RICOPA

COUNTY NONA

TTAINMENT A REA

Pr ep ar ed by:

March 2004

Te ch ni ca l As si st an ce Pr ov id ed By:
Arizon a Department of Environ mental Quality Arizona Department of Transportation Maricopa County Environmental Services Department U.S. Environ mental Protectio n Agencyi

ON E- HO UR OZ ON E R ED ES IG NAT IO N R EQ UE ST AND MAI NT EN ANC E P LAN

FOR THE M AR ICOPA

COUNTY

NONA TTA INMENT AREA TABLE OF CONTENTS CHAPTER PAGE EXECUTIVE SUMMARY

.............. .............. ........... ES-1 ONE INTRODUC TION

.............. .............. ........ 1-1

NATIONAL AMBIENT AIR QUALIT Y STANDARD FOR OZONE

.............. .............. ........... 1-2 CHAR ACTERI STICS A ND HE ALTH EF FECTS OF OZONE

.............. .............. ............. 1-2 NONATTAINMENT AR EA

.............. .............. . 1-2 HISTORY

.............. .............. .............. 1-3 REQUIRED C OMPONENTS OFA REDESIGNA TION REQUEST

.............. .............. ............. 1-4 TWO REDESIGNA TION REQUE ST

.............. ............ 2-1 REQUIRED C OMPONENTS OFA REDESIGNA TION REQUEST

.............. .............. ............. 2-1 ATTAINMENT OF THE ONE-HOUR OZONE STA NDARD

.... 2-1 APPROVAL OF THE OZONE NONATTA INMENT SIP ELEMENT FOR

THE MARICOPA COUNTY A REA

...... 2-8 IMPROVEMENT IN AIR QUALITY DUE TO PERMANENT AND ENFORCEABLE EMISSION REDUCTIONS

........... 2-8 ATTAINMENT AND M AINTENANCE C ONTROL MEASURES

.............. .............. ............ 2-9 CLEAN AIR ACT SECTION 110 AND PART D REQU IREME NTS

.............. ............. 2-14ii

CHA PTER PAG E
THREE MAI NT EN ANC E P LAN

.............. .............. .... 3-1

MAINTENANCE PLAN CONTROL MEASURES

............ 3-1 EMISSION IN VENTORIES

.............. .............. . 3-7 MAINTENANCE DEMONSTRATION

.............. ...... 3-13 MOBILE SOURCE EMISSIONS BUDGETS FOR OZONE

... 3-13 MONITORING NETWORK/VERIFICATION OF CONTINUED ATTAINMENT

.............. ............ 3-16 CONTINGENCY PROVISIONS

.............. .......... 3-17 SUBSEQUENT MAINTENANCE PLAN REVISI ONS

........ 3-18iii

ON E- HO UR OZ ON E R ED ES IG NAT IO N R EQ UE ST AND MAI NT EN ANC E P LAN

FOR THE M AR ICOPA

COUNTY

NONA TTA INMENT AREA LIST OF TABLES
TABLE PAGE ES-1 1999 Base Case and 2015 Committed Mai ntenance Measure s

........ ES-4 ES-2 1999 Base Case and 2015 Committed Mai ntenance MeasureVOC Emissions in the One-Hour Ozone Nonattai nment Area

.............. ES-5 ES-3 1999 Base Case and 201 5 Committed Maintenan ce Measure NO x Emissions in the One-Hour Ozone Nonattai nment Area

.............. ES-6
2-1 200 0 Ozon e Mon itori ng Dat a Sum mary f or th e Mari copa Coun ty Nonattainment Are a

.............. .............. .............. 2- 3
2-2 200 1 Ozon e Mon itori ng Dat a Sum mary f or th e Mari copa Coun ty Nonattainment Are a

.............. .............. .............. . 2-4 2-3 2002 Ozone Moni toring Da ta Summary for th e Maricopa C ounty Nonattainment Are a

.............. .............. .............. . 2-5 3-1 Committed Maintenance and Conting ency Measur es in the One-H our Ozone Maintenance Plan.

.............. .............. ........... 3-3 3-2 Summary of 2015 Emis sion Reducti ons in the Nonat tainment Area From Committed M aintenance Measur es Used for Numer ic Credit

. ....... 3-6 3-3 Summary of NO x Emissions for t he July Epi sode in 1998 Base Case and 2015 W ith Committed Maintenan ce Measures.

.......... 3-9 3-4 Summary of VOC Emissions f or the July Episode in 1998 Base Case And 2015 With Committed Maintenance Measures

.............. .... 3-10 3-5 Summary of NO x Emissions for the August Episod e in 1999 Base Case, and 2006 and 20 15 W ith Committed Maintenan ce Measures.

..... 3-11 3-6 Summary of VOC Emissions f or the August Episode in 1999 Ba se Case, and 2006 and 20 15 W ith Committed Maintenan ce Measures.

..... 3-12 3-7 The 1998, 1999, 2006, and 2015 Maximum Simul ated One-Hour Ozone Concent rations for Both the July and August Epis odes

.......... 3-14iv

ON E- HO UR OZ ON E R ED ES IG NAT IO N R EQ UE ST AND MAI NT EN ANC E P LAN

FOR THE M AR ICOPA

COUNTY

NONA TTA INMENT AREA LIST OF FIG URES FIGURE PAG E ES-1 One-Hour Ozone Trends (1995-2 002)

.............. ............. ES-2 ES-2 2015 NO x Emission Reduc tions From Indi vidual M aintenance Measures in the One-Hour O zone Nonattai nment Area

.............. ES-7 ES-3 2015 VOC Emission Reduc tions From Indi vidual M aintenance Measures in the One-Hour O zone Nonattai nment Area

.............. ES-8
2-1 One-Hour Ozone Regional Monitoring Network

.............. ........ 2-6
2-2 One-Hour Ozone Trends (1995-2 002)

.............. .............. . 2-7 3-1 2015 NO x Emission Reduc tions From Indi vidual M aintenance Measures in the One-Hour O zone Nonattai nment Area

.............. . 3-4 3-2 2015 VOC Emissi on Reductions F rom Indivi dual Maintenance Measures in the One-Hour O zone Nonattai nment Area

.............. . . 3-5v

ONE-HOUR

OZONE RED ESIGNA TION REQUE ST A ND MA INTENA NCE PLA N FOR THE MA RICOPA

COUNTY

NONA TTA INMENT AREA
APPE NDICES
APPE NDIX A Exhibit I : 1999 Periodic Ozone Emission Inven tory for the Maricopa County ,

Arizona Nonattainment Ar ea. Maricop a County

Environmenta l Servi ces Department. Nov

ember 2001, Rev ised August 2002. Exhibit 2: Technical Support Document for Ozone Model ing in Supp ort of th e One-Hour

Ozone Redesignation Request and Maintenance Plan for the Maricopa C ounty Nonattai nment Area. Mar ch 2004.
APPE NDIX B Exhibit1: Resolution to Implement RACT for the One- Hour OzoneRedesignati on Request and Maintenance Plan for the Maricopa C ounty Nonattai nment Area. Mari copa County Board of Supervi sors. Dece mber 17, 2003. Exhibit 2: Neg ative Declarati on for Fiberg lass Boat Manu facturing . Letter fro m Maricopa Coun ty to A rizon a Dep artm ent o f En viron men tal Q uali ty. November 25, 2003.
APPE NDIX C Exhibit 1: Public Hear ing Proces s Documentation Exhibit 2: Certificati on of Adoption

## ONE-HOUR OZONE REDESIGNA TION REQUEST AN D MA INTENA NCE PLA N FOR THE MA RICOPA

COUNTY NONA

TTAINMENT A REA

EXECUTIVE SUMMA RYES-1

ONE-HOUR OZONE REDESIGNATION REQUEST A ND MA INTENANCE PLA N

FOR THE M AR ICOPA

COUNTY

NONA TTA INMENT AREA EXECUTIVE SUMMARY

The Marico pa Assoc iation of Governments (MAG) is reques ting that the U.S. Environmental Protection Ag ency (EPA) redesignate the Marico pa County nonat tainment area to attainment for theNational Ambi ent Air Quali ty Standards for one-hour oz one. No violatio ns of the one-hour oz one standard have occurred s ince 1996. With the submittal of this redesi gnation req uest and maintenance plan, the Maricopa County nonatta inment area has satisfie d all of the requir

ements for redesig nation to attainment for one-hour ozone. Under the 1990 Clean Ai r Act Amendments, t he Maricopa C ounty nonattai nment area was classified as Moderate for the one-hour oz one stand ard. B ecause attainment w as not achieved by November 19, 1996, the area was classified to Serious, effective Febru ary 13, 1998, with anew attainment date of November 19, 1999. The MAG 1993 Oz one Plan, addressing the Moderate Ar ea require ments, wassubmitted to the Environmental Protection Agency (EPA) in November 1993

. An Addendum to this Moderate Area plan was submitted to EPA in March 1994. EPA approved a nd promulgated a Revis ed Rate of Progr ess Federal Impl ementation Plan for the Maricopa County nonattainment are a, effect ive August 5, 1999. In February 2000, the State of Arizona requested an ozone attainment determination for t h e Marico pa County ar ea. A Serious Area Ozone State Implementation Plan (SIP) for Maricopa C ounty

was submitted to EPA in De cemb er 2000. On May 30, 2001, EPA publi shed a final attai nment determination for t he one-hour oz one standard. The Clean Air Act defines the followi ng criteria that must be met before a nonattainment area can be redes ignated to attainment:

• EPA

must fully approve the Serious Area Ozone SIP for M aricopa County submi tted to EPA in December 2000 an d any related SIP componen ts.

• EPA

must determine tha t the area has at tained the one-hour

ozone stan dard. Th is determination w

as made by EPA o n May 30, 200 1.

• EPA

must determine tha t the imp rovement in air quali ty is due to permanent and enforceable reduct ions in emissions.

• The State must meet all appl icable req uirements for State Implementation Pl ans (SIPs) and N onattainment Areas as defined in the C lean Air Act

. • EPA

must approve a maintenance plan for the area . The plan must demonst rate maint enance of the one-hour ozone stan dard for a period of a t least ten years following the redesig nation to attainment by EPA. Chapter Two of this document prov ides monitori ng data to suppor t the finding th at the oneh our ozone standar

d has been met in thenonattainment area since 1996. Figure E S- 1 show s the continuous downwar d trend in oz one concentrati ons occurri ng in the nonattainment

area. Chapter Two demonstrates that these improvements in air quality areES-2ES-3

attributable to permanent, enf orc eable red uctions in ozone precursor emissions. The second chapter also documents that other Clean A ir A ct requir

ements for SIPs and nonattainment areas have been met. Gene rally, the overal l approach take n in prepari ng the One-Hour Ozone Maintenance Plan is to demonstrate mai ntenance of the one-hour ozone standar

d in 2015 wi th the committed measures in the Rev ised MAG 1999 S erious Area C ar bon Mon oxide Plan and Carbon Monoxide Redesignati on Request and Maintenance Plan, since most of those measures also reduce ozone. Theref ore, the Ozone Main te nance Plan rel ies heavil y upon the Revi sed MAG Serious Area Carbon Monoxide Plan and its supp orting docu ments , including the commitments to i mplementcontrol measur es. The Ozone M aintenance Plan also relies upon the Final Se rious Area Ozone State Impl ementation Plan for M aricopa County and themodifie d Arizona Cl eaner B urnin g Gas olineProg ram. Ch apter Thr ee contains the O ne-Hour Oz one Maintenance Pl an for the nonattainment area. The Maintenance Pl an demonstrates that the area w ill contin ue to maintain the onehour ozone standar

d through 2015, a period of at leas t ten years following redesignat ion to attainment by EPA. Maintenance of thestandard throug h 2015 wil l be achieved despite growth in regio nal population, employment, and vehicle travel, due to more s tringent federal controls on ve hicles and fuels, and sta te and local committed m easures in this Maintenance Pl an. Table ES-1 identifies the mea sures for which numeric cred it was taken in validating the air quality models for

1998 and 1999. The seven committed m aintenance measu res for which numeric credit istaken in the M aintenance Plan ar e also identifie d in Table ES-1. Six of these maintenance measures were als o committed measures in the Rev ised MAG 1999 Ser ious Area Carbon Monoxide Plan and the 20 03 Carbon Monoxide Redesig natio n Request and Maintenance Plan. CARB Phase 2 gasol ine with 3.5 percent oxygenate in winter was also a committed measure in the Carbon Monox ide Pl ans. Th e summer time formulation of this fuel is a committed measure i n the Ozon e Maint enance Plan, as described in the Technical Support Document. Rule 348 isa new measur e adopted by Maricopa County to reduce volatile organiccompounds (VOC) emissions f rom aerospace manufacturing and r

ework oper

ations. Tables ES-2 and ES-3 compare VOC and nitrogen ox ides (NOx ), respecti vely, in the 1999 base case to emissi ons in 2015 with the committed mainte nance measures. The max imum one-hour ozo ne concentra tion modeled in 199 9 was 0.125 pa rts per mil lion (ppm). The maximum one-hour oz one concentrati on in 2015 is pr ojected to be 0.12 0 ppm, which demonstrates mainte nance of the standard. FiguresES-2 a nd ES- 3 ill ustra te the e mi ssion reductions at tributable to each of the maintenance measures in 2015. With th e committed measures , the Maintenance Plan projects that onroad mobil e sources w ill contr ibute 15.9 percen tof the VOC emissions in 2015 or 48.7 metric ton s per

day. Onro ad mobile sources also contr ibute 25.4 percen t of the NOx emissions in 2015 or 53.6 metric tons per day. These figures, 48. 7 metric tonsES-4 TABLE ES-1 1999 BA SE CA SE A ND 2015 COM MITTED M AIN TENA NCE MEA SURES

Base Case Measures Assumed in the 1999 Model Vali dation fo r the OneHour Ozon e Maintenan ce Plan Committed Maintenan ce Measures Used for Credit in the One-Hour Ozone Main tenance

Plan

1. Inspection/M aintenance (I/M ) idle test was required for all gasoli ne vehic les 1. CARB Phase 2 and Fede ral Phase II Reformulated Gasol ine wi th 7 psi from May throu gh September 2. I/M wai ver rates of 10% a ssumed for pre-19 81 mode l ye ar ve hicl es and 4%, for 1981 and new

er vehicl es 2. Coordi nate Tra ffic Sign al Sy stems

3. Oxygenate con tent and Rei d Vapor Pressure (RVP) were based on actual fuel pr opertie s from surveys 3. Tougher Enf orcement of Vehicle Registration an d Emission Test Compliance 4. Vehic les p artici patin g in I/M test - 88%; not-participati ng - 12% 4. One Time W aiver from Vehicle Emissions Test 5. Expansio n of Area A (S.B . 1427) 5. Develop Intelligent Transp ortation Syste ms 6. Phase d-in E missi on Test Cutpoi nts 7. MaricopaCounty R ule 348ES-5 TABLE ES-2 1999 BASE CA

SE AND 2015 COMMITTED MAINTENANCE MEA SURE VOC EMISSIONS IN THE ONE -HOUR OZ ONE NONA TTA INMENT AREA

Tuesday , Au gust 1999 Source Catego ry Metric Tons

per Day Percent

Point 15.3 4.3 Area 82.6 22.9 Biogenics 76.7 21.3 Nonroad Mobile 78.5 21.8 Onroad Mobile 106.9 29.7 Total 360.0* 100.0* August 1 999

Tuesday , Au gust 2015 Source Catego ry Metric Tons

per Day Percent

Point 20.2 6.6 Area 123.5 40.2 Biogenics 85.8 28.0 Nonroad Mobile 28.7 9.4 Onroad Mobile 48.7 15.9 Total 306.9* 100.0* August 2015 * No te th at th e su m of th e so urcecate gori es ma y not equ al t he to tal due to ro undi ng. Point Sources - Industrial, Manufacturing, and Electri cal Power Generation Fac ilities Area Sources - Residential W ood and Industria l Fu el Combustion, On-site Incineration , and

Open Burning Biogenics - Natural Veg etation Nonroad Mobil e - Utili ty, Lawn & Garden, Const ruction, Far m, and Recreati onal Equ ipment,

Aircraft and LocomotivesES-6 August 1999

August 2015 TABLE ES-3 1999 BASE CA

SE AND 2015 COMMITTED MAINTENANCE MEA SURE NOx EMISSIONS IN THE ONE -HOUR OZ ONE NONA TTA INMENT AREA Tuesday , Au gust 1999 Source Catego ry Metric Tons

per Day Percent

Point 16.5 6.4 Area 43.0 16.8 Biogenics 7.3 2.9 Nonroad Mobile 59.3 23.2 Onroad Mobile 129.8 50.7 Total 255.9* 100.0*

Tuesday , Au gust 2015 Source Catego ry Metric Tons

per Day Percent

Point 26.3 12.5 Area 67.4 32.0 Biogenics 6.2 2.9 Nonroad Mobile 57.2 27.1 Onroad Mobile 53.6 25.4 Total 210.7* 100.0*

* No te th at th e su m of th e so urcecate gori es ma y not equ al t he to tal due to ro undi ng. Point Sources - Industrial, Manufacturing, and Electri cal Power Generation Fac ilities Area Sources - Residential W ood and Industria l Fu el Combustion, On-site Incineration , and

Open Burning Biogenics - Natural Veg etation Nonroad Mobil e - Utili ty, Lawn & Garden, Const ruction, Far m, and Recreati onal Equ ipment,

Aircraft and LocomotivesES-7ES-8ES-9

per day of VOCs and 53.6 metric tons per day of NOx, r epresent the conformi ty budgets for ozone precursor emissions in 2015. In add it ion, the Maintenance Pl an establishes interim conformity budg ets of 71.9 metric tons per day for VOCs and 104.8 metric tons per day for NOx

in 2006. The Clean Air Ac t also requires that a maintenance plan also contain contingency provi sions. The maintenance plan is not req uired to contai n fully adopted cont ingenc y measure s. Chapter Three identifie s three contingency measures that were also contingency measures in theRevised MAG 1999 Serio us Area Carbo n Mon oxide Pla n. These measures hav e already b een adopted and implemented in thenonattainment area. Earlyimplementation of cont ing ency measures is allowed by EPA. The contingency measures in this Maintenance Pl an are: Expans ion of Area A Boundar ies, Gross Polluter Option for I/M Prog ram Waivers, and Increas ed Waiver Repair Limit Options. Cha pter Three describes t he process and s ched ule to be followed i f monitoring data indicate additional measur

es are needed in the future.1-1 CHAPTER ONE INTRODUC TION The Maricopa As sociation of Governments (MAG ) is req uesting that th e U.S. Environmental Protection Ag ency (EPA) redesignate the Marico pa County nonat tainment area to attai nme nt for the one-hour ozone Nati onal Ambient Air Quality Standard. The area was desi gnated a nonattai nment area for oz one in 1978, but hasnot viola te d the standard since 1996. Theref ore, the area is now el igibl e fo r rede signa tion . Cha pter Two contains the formal redesi gnation request and supporting documentation. Chapter Three providesthe Maintenance Plan whic h demonstrates con tinued attainment of the one-hour ozone standar

d through the y

ear 2015. In 1978, the Governor

of Arizona des ignated the Maricopa As sociation of Governments as the lead air q uality pl anning agenc y for Maricopa C ounty. Toget her with the State, MAG is responsible for determining which el ements of the State Implemen tati on Plan wi ll be planned, implemented and enforced by State and l ocal governments in Arizona. In 1992, the Arizona L egislatur

e recertified MAG as the regional air qual ity planni ng agency. MAG coordinateswith the Arizona D epartment of Envi ronmental Qua l ity, Ari zona Depart ment of Transportation a nd the M aricopa County Environmental Services Department in developing the plans necessary to attain and m aintain the national stan dards. This redesignat ion request and Maintenance Plan have been reviewed and approved by the MAG Air Quality Technical Advisory Commit tee, the MAG M anagement Committee and the MAG Regi onal Council . The MAG Air Quality Technical Adv isor y Committ ee was established in 1995 wi th representati ves from State, county and l ocal governments, priv ate indu stry, en vir

onme ntal groups, and the public-at-large. The Air Qua lity Technical Advisory Committee makes recommendatio ns to the MAG Management Committ ee on air quality plans, projects, fundin g and other pertinent issues. The MAG Manage ment Committee i s compr ised of managers from each of the MAG member agenciesthat include t wenty-five citie s and towns, the Salt Riv er Pima-Mar icopa and Gila River Indian Communi ties, Mari copa County, and the Ar iz ona Department of Transportation. The MAG Manag ementCommittee makes r ecommendations to the MAG Regi onal Co uncil. The Regional Council is the MAG decision-making bod y and is composed of elected officia ls from the MAG member agencies

. MAG has also conducted a public hearing on this redesignation request and m aintenance plan in accordance with federal requirements. All pub li c comm ents and responses are provided in Appendix C.1-2

NATIONAL AMBIENT AIR QUALIT Y STANDARD FOR OZONE The federal one-hour ozone standar d is 0.12 parts

p er million (ppm). For the one-hour standard, a violati on occurs w hen the expected number of exceedance s of the standard thatare recorded at a m onitoring site during a calendar year and then averaged over a three year period is greater than one. Four exceedances measu red durin g a three year period at a singl e air monitor ing statio n equal one v iolation of the ozone standard. An exceedance is considered as a mon itored value of 0.125 ppm or greater. The last exceedance of the one-hour ozone standar d in the nonattain ment area was recorded in 19 96. There have been no exceedances of the one-hour ozone standard at any of the ozone monitors located in the nonattai nment area in 1997, 1998, 1999, 2000, 20 01, and 2002. There have been no viol ations of the one-hour ozone standar

d sinc e 1996. CHARACTERISTICS AND HEALTH EFFECTS OF OZONE Ozone is not directly emitted from a source, but is produced by the mixing of volatile organiccompounds and nitr ogen oxide s in the pres ence of heat and sunli ght. Mo st precursors to ozone, volatile organic compounds ,and nitr ogen oxide s are emitted from onroad and nonroad engines. Other sour ces of ozone precursors are industrial, manufacturi n g and electrical power generation facilities; dry cleaners, service stations, architectur

al coatings, and consumer and commercial solvent us e; and natural vegetation. Peakconcentrations typically occur in theurban area from May thr ough September w hen high tempe ratures a re conducive for forming oz one. Also, due to prevail ing afternoon winds, ozone and oz one precursor s are transpor

ted to the moun tainous areas e ast and north of the Maricopa County Nonattainm ent Area where e levated lev els of ozone may occur. Ozone ir ritates the lungs and repeated expos ure may caus e permanent lung damage. Symptoms of

ozone exposure may includ e wheezing, co ughing, an d pain whe n taking a deep breath. Children, persons w ith pre-ex isting respirator y conditi ons such as ast hma, and others who are active outdoors when ozone levels are high are mos t affected by the adverse health effects of ozone. Even low lev els of ozone may

cause agg ravated ast hma, reduced lung capaci ty, and make per sons more susceptible to res pirato ry ill nes ses like pneumonia and bronchitis. NONATTAINMENT AR EA The Mari copa County one-hour ozone nona ttainment area enco mpasses 1,946 square miles in central Arizona. The northern boundar y of the nonattain ment area is l ocated approximately six miles north of Carefree Highway and the southern boun dary, generally along Hunt H ighw

ay. Tothe east, the ar ea is bounded by the Pinal County Li ne and the Tonto National For

est; on the west, by Jac krabbi t Trail and Beardsley Canal. The area contains por

tion s of twen ty-two cities and towns, the Fort McDowell, Gila River and Salt River Pima-Mari copa Indian Communit ies, and some uni ncorporated ar eas of Maricopa1-3

Coun ty. According to the U.S. Cens us, the populati on of Maricopa C ounty in 2000 was 3.1 million. Most of these residents live and work within the nonattainment area boundaries. The nonattainment area is located i n the Salt River Valley at 1,100 feet above mean s ea level and is almost completely surrounded by mountains. The cl imate in the nonattainment area is arid contine ntal, wi th temperatures r anging from a mean of

52 degrees Fahrenheit in January

to 91 degrees , in July . The sun shines 86 percent of the time and the annual rainfall is about 7.44 i nches. In gen e ral, the pre vailing wind dir ection is from E/SE to W/SW , although the winds can shift in the afternoon to a more wes terly di rection. HISTORY In accordance w ith the Clean Air Act, an u rba n ized porti on of Maricopa C ounty wa s formally designated as a nonattainm ent area for ozone in 1978. Under the 1990 Clean Air Act Amendments, the nonattai nment area was classified as

Moderate for ozone. In order to meet the Moderate a r ea require ments, the MAG 1993Ozone Plan for the Maricop a County Area was submitted to the Env ironmental Pro tection Agen cy by November 15, 1993. An Adde ndum t o this Plan containing additional co ntrol measureswas submit ted to EPA in Mar

ch 1994. On April 13, 199 4, EPA issued a incompleteness find ing on the 199 3 Ozone Plan and Addend um because the plan failed to includ e, in fully adopted and enf orceable form, all of the measures r

elied upon in th e 15 perce nt de mon stra tion . Thi s act ion s tart ed a t wo year FIP clock under CAA Secti on 110 (c) for EP A to promulgate a 15 percent Rate of Progress Federal Implementation Plan. In November 1994 the m odeling attai nment demonstration for the 1993 Ozo ne Plan and Addendum w as submitted to E PA with a revisi on to the modeling attainment demonstr ation follow ing in Apr il 1995. The MAG 1993 Ozone Plan and Addendum, as well asthe attainment demonst ration, was found comple te by EPA on Ma y 12, 1995. Modeling contained in th e Revisi on to the Modeli ng Attainment D emonstration for th e MAG 1993 Ozone Plan for the Mar icopa County Area and Addendum conc luded that reduction s in NOx would increase ozone concent rations and therefore not contribute to attainment of the ozone standar

d. EPA finaliz ed approval of a NOx exemption petition for the Maricopa County Nonattainment Ar

ea on April 19, 1995. Section 182 o f the CAA allow s for an exemption whe n re duct ions of oxides of nitrogen ( NOx) w ould not contri bute to ozone attainment. On November

6, 1997, the nonattai nmentarea was reclassified to Serious due to f ailure to attain the oz one standard by November 15, 1996. The Serious Ar ea reclassi fication was eff ecti ve on February

13, 1998. Foll owing t he outcome of a lawsuit filed to r equire that EPA enforce the Federal Implementation Plan prov isions in S ection 110(c) , EPA promulgated a Federal Impl ementation Plan for the 1 5 Percent Rate of Progress requirement on May 27, 19 98.1-4

On December 14, 2000, the Serious Ar ea Ozone State Implementation Plan for Mari copa County wa s submitted to EPA by the Ar izona Depar tment of Environmental Quality

. I n accordance with Sec

tion 110, a compl eteness finding on the Serious A rea Ozone State Implementation Plan was deemed by operati on of law si nce a determinati on was not made by EPA w ithin six

months of receipt of the Plan. W hile this latest

SIP has not been approved under section 110(k), it is anticipated tha t EPA approval will occur before this request for redesig nation is submi tted. If not, approv al action on SIP elements of the Serious Ar

ea Ozone State Implementation Plan for Maricopa Coun ty and the re desi gnat ion re ques t may o ccur s imul tane ousl y. On May 30, 2001 , EPA determined t hat the serious ozone nonattainment areahad attained the one- hou r ozon e sta nda rd. T he at tain men t det ermi nati on was eff ecti ve June 29, 2001. EPA also determined thatthe serious area requirements for reasonable further progress, attain me nt determinat ions, and conti ngency meas ures for the one- hour standard w ould not apply as l ong as the ar ea continued to attain the standard. REQUIRED C OMPONENTS OFA REDESIGNA TION REQUEST Sections 107(d)(3)( D) and (E) of the Clea n Air Act define the criteri a that must be met before an area can be redesig nated to attainment. With the submittal of this redes ignation request and mai nten ance plan , the Maric opa Coun ty non atta inme nt ar ea m eets the f ive requi red c riter ia, su mma rized belo w: 1. Attainment ofthe Standard Chapter Two show

s that the area h as attained the nat ional one-hour ozone standar

d. Eff ecti ve June 29, 2001, EPA d etermined thatthe serious ozone nonattainment area had attained the one-ho ur ozone standard. 2. State Implementation Plan Approv al On December 14, 2000, the Arizona D epartment of Environmenta l Quality submitted the Serious Area Ozone State Implementation Plan for Mar i copa County to EPA. In accordance with Section 110, a completeness fi ndin g was de eme d by op erat ion o f law. EPA app roval of t he plan may be f orthcom ing. 3. Imp rove mentin Air Qual ity Due to Permanent and Enforceab le Emission Reductions Chapter Two discusses t he evidence t hat the improvement in air q uality l eading to attainment

and maintenance of the s tandards has been due to permanent and en forceable emissions reductions.1-5

4. Clean Air Act Section 110 an d Part D Req uirements Chapter Two discusses how requirements of Clean Air Act Section 11 0 (for SIPs) and Part D (for nona ttai nme nt ar eas) are sa tisf ied b y t h e Final Seri ous Area Oz one State Implementation Plan for Maricopa County and the One-Hour Maintenance Pl an provided in Chapter Three of thi s document. In addition, some of these req uirements are s atisfied by the Revis ed MAG 1999 Ser i ous Area Carb on Monoxide Plan and MAG C arbon Monoxide Redesignati on Request and Maintenance Pl an for the M aricopa County Nonattainment Area , which were submitted to EPA on April 18, 200 1 and June 16, 2003 resp ecti vely. Seve ral of t he car bon mono xideme asure s also redu ce ozo ne an d have therefore been incl uded in the Oz one Maintenance Pl an. 5. Maintenance Pl an Chapter Three contains t he Maintenance Pl an for the Mari copa County one-hour oz on e nonatta inme ntarea. The Maintenance Plan demonstr ates that the are a will continue to maintain the one-ho ur ozone st andard through 2015, a pe riod of at least ten years following redesignation to attainmen t by EPA. The Ma intenan ce Plan also contains contingency meas ures that have been implemented and describes the proces s and schedule that will be used to consider ad ditional measures, if ne eded. Contingency provisi ons will be triggered when the three-year average of the fourth highest daily maximum hourly measuremen t exceeds 0.120 ppm at any ozone mon itor.2-1 CHA PTER T

WO REDESIGNA

TION REQUE ST The Maricopa Associ at ion of Governments (MAG) r equests that t he U.S. Envi ronmental Protecti o n Agency ( EPA) redesig nate the Maricopa County nonat tainment area to attainment

for the one-hour ozone Nation al Ambient AirQuality Standard. The areawas design ated a one-hour oz one nonattainment areain 1978, but has not violated the standard since 1996. Therefore, the a rea is eli gible for r edesignation. REQUIRED C OMPONENTS OFA REDESIGNA TION REQUEST Th e EPA A dministrator may not redes ignate an are a to attainment, unl ess the follow ing requirements

of Section 107(d)(3)(E) of th e Clean Air Act (CAA) are met. T hese four requirements for redesignation are d iscussed in this chapter. 1. The Administrator determines that the area ha s attai ned the national am bient air quality standards. 2. The Administrator has fully ap prove d the applicabl e implementation pl an under Section 110(k). 3. The Administrator determines that the improvement in air q uality i s due to permanent and en forceable reductions in em issions. 4. The State has me t all applicable requirements under Sect ion 110 and Part D. A fifth require ment for redesig nation to attainment is that: 5. The EPA Administrator approve a main t enance plan for the ar ea that meets the provisi ons of Section 175A. Chapter Three contains the ma intenance plan that is being submit ted to EPA to fulfill this fifth and final requi rement. ATTAINMENT OF THE ONE-HOUR OZONE STA NDARD On May 30, 2001 , the Envir onmental Protecti on Agency deter m ined that the Maricopa serious ozone nonattainment area had attained the o ne-hour stan dard. The attainment determination w

as effective June 29, 2001. Attainment

of the one-hour ozone Nation al Ambient Air Quality Standard is demonstrated when three consecutive years of monitoring d ata for each site average n o more than one exceedance per year. The followin g infor mation demonstrates , as requi red by Sect ion 107(d)(3)( E) of the Clean Air Act, that the M ar icopa C ounty nonattai nment area has2-2

attained the one-hour ozone nationa l air quality standard. This is based on quality assured monitoring d ata representi ng all monitoring locations in the no nattainment area. Histo rical Persp ecti ve Areview of one-hour ozo ne monitoring data since 1994 r eveals that in 1994 throug h 1996, there were a total of

18 exceedance days, six in 1994, eleven in 1995, and one i n 1996. Data from the regio nal monitori ng networ k indicates that the Mari copa County nonattainment

area last ex

ceeded the one-hour

ozone standar

d in 1996. There w

ere no exceedances of thestandard at any site during the period 1997- 2002. The Maricopa C ounty

nonattainment area typicall y exper iences hot condi tions during the summer months between May and September with day time temperatur

es exceeding 90 degree s Fahrenheit. Although seas onal rainfall may occur duri ng this per iod, d ry conditions usually persist w ith clear skies making the region conducive to ozone formation. Wind speeds during the summer are frequentl y less t han five milesper hour. The differences in topograph y betwee n the mountainous ar eas and valley

floor create unev

en heating and cooling which influence air flow patterns. Th e wind patterns generally exhibit an easterly

direction i n the morning and shift to a westerly direction in t he aft ernoon. These wind patterns gen erally tend to dispers e precursor emissions to the east and north of the urban area. A detail ed descripti on of the climate con ditions and lo cal wind patterns is included in t he Final Seri ous Area Oz one State Implementati on P lan for Maricopa County on pag es 1-1 throug h 1-3. Ozone Monitoring Network The ambient

air monitori ng networ k for ozone i n the Marico pa County nonat tainment area consists of four National Ai r Monitori ng Stations ( NAMS), 14 State and Local Air Monitoring Stations (SLAMS), an d three Special Purpose Moni tors (SPM) operated by

the Maricop a County Environmental Services De partment and the Arizona Department of Env ironmental Qual ity. The ozone monitoring sitesar e ide ntified, along with summar y data from 2000 through 2002, in Tables 2-1 through 2-3 . Figur e 2-1 shows

the geogr

aphical dist ribution of the regional monitoring network. Monitoring Results and Attainment o f the Standard The monitoring data presented in Tab les 2-1 through 2-3verify that the Mari copa County nonattainment

area has been in attainment for the national one-hour ozone stand ard since 1997, as well as

for the most recen tthree-yea r period (2 000-2002), in accordance w ith the federal requirement

s of 40 CFR 50.9. Data recovery rates for most monitorswithin the monitoring network exceed the 75 percent complete ness requirements for the three-yea r period. In addition, al l state and federal quality assurance pr

ocedures hav e been followed. Figure 2-2 illus trates the dow nward tr end for monitors i n the nonattainment area wit h the fourth-highest one-hou r ozone concentrations.TABLE 2-1 2000 OZONE MO NITORING DA TA SUMMA RY FOR THE MA RICOPA

COUNTY

NONA TTA INMENT AREA 1-HOUR STANDARD: .12 PPM*

2-3 Site Max Value (PPM) 2 nd High

(PPM) 3 rd High

(PPM) 4 th High

(PPM) Blue Poin t, Use ry Pass & Bus h Hwy .108 .107 .101 .101 Central Phoenix, 1845 E. Roosevelt .094 .092 .091 .091 Emergency

Mgt., 2035 N . 52nd St. S .088 .085 .084 .083 Falcon Field, 4530 E. McKellips, .097 .093 .092 .090 Fountain Hil ls, 16426 E. Pal isades .117 .106 .101 .097 Glen dale , 600 0 W . Olive S .100 .094 .090 .089 Humboldt Mt., Top of Humboldt Mt. S .093 .093 .092 .091 # JLG Supersite, 4530 N. 17th Ave. .104 .090 .089 .085 Lake Pleasant, 4140 2 N. 17th Av e. S .097 .092 .091 .091 Maryvale, 6180 W. Encanto S .100 .096 .093 .092 Mesa, 370 S. Brooks .102 .090 .087 .083 Mount Ord, M azatzal Mountains .111 .109 .106 .105 North Phoenix , 601 E. Butler .107 .107 .098 .096 Palo Verde, 36248 W. Elliot Rd. .103 .091 .087 .085 Pinnacle Peak, 25000 N. Win dy Walk .117 .104 .100 .097 Rio Verde, 25608N. Forest Rd. S .117 .108 .107 .105 South Phoenix, 33 W . Tamarisk .102 .094 .093 .092 South Scottsdale, 2857 N. Mil ler .099 .097 .097 .096 # Tempe, Apache Blvd. & Colleg e Ave. .099 .094 .090 .090 # W est Chandler, 163 S Price S .083 .083 .082 .079 # West Chandler, Frye Rd. & Ellis S .100 .099 .091 .090 W est Phoenix, 3847 W . Earll .099 .098 .097 .092

* Due to mathematical round ing, values $ .125 ppm are necessary to exceed the standard. # Indicates < 75% data avai lable. S Seasonal monitor

operating fro m April 1 to N ovember 1.TABLE 2-2 2001 OZONE MO NITORING DA TA SUMMA RY FOR THE MA RICOPA

COUNTY

NONA TTA INMENT AREA 1-HOUR STANDARD: .12 PPM*

2-4 Site Max Value (PPM) 2 nd High

(PPM) 3 rd High

(PPM) 4 th High

(PPM) Blue Poin t, Use ry Pass & Bus h Hwy .111 .104 .093 .093 # Cave Cr

eek, 37109 N. Lava Lane S .112 .100 .096 .092 Central Phoenix, 1845 E. Roosevelt .091 .091 .090 .090 # Emergency

Mgt., 2035 N . 52nd St. S .073 .072 .072 .072 Falcon Field, 4530 E. McKellips, .111 .100 .097 .095 Fountain Hil ls, 16426 E. Pal isades .110 .106 .098 .097 Glen dale , 600 0 W . Olive S .116 .099 .098 .098 Humboldt Mt., Top of Humboldt Mt. S .098 .096 .096 .096 JLG Supersite, 4530 N. 17th Ave. .101 .095 .094 .093 # Lake Pleasant, 41402 N. 87th Ave. S .085 .083 .082 .080 Maryvale, 6180 W. Encanto S .097 .091 .089 .088 Mesa, 370 S. Brooks .093 .092 .088 .084 Mount Ord, M azatzal Mountains S .102 .089 .089 .089 North Phoenix , 601 E. Butler .110 .101 .098 .097 Palo Verde, 36248 W. Elliot Rd. S .085 .085 .083 .081 Pinnacle Peak, 25000 N. Win dy Walk .107 .103 .102 .100 Rio Verde, 25608N. Forest Rd. S .102 .100 .099 .096 South Phoenix, 33 W . Tamarisk .098 .094 .092 .086 South Scottsdale, 2857 N. Mil ler .102 .101 .094 .092 # Surprise, 1 8600 N. Reems .093 .088 .087 .083 Tempe, Apache Blvd . & Colleg e Ave. .099 .099 .096 .093 W est Chandler, Frye Rd. & Ellis S .105 .100 .096 .092 W est Phoenix, 3847 W . Earll .099 .094 .094 .089

* Due to mathematical round ing, values $ .125 ppm are necessary to exceed the standard. # Indicates < 75% data avai lable. S Seasonal monitor

operating fro m April 1 to N ovember 1.TABLE 2-3 2002 OZONE MO NITORING DA TA SUMMA RY FOR THE MA RICOPA

COUNTY

NONA TTA INMENT AREA 1-HOUR STANDARD: .12 PPM*

2-5 Site Max Value (PPM) 2 nd High

(PPM) 3 rd High

(PPM) 4 th High

(PPM) Blue Poin t, Use ry Pass & Bus h Hwy .110 .104 .102 .098 Cave Cr eek, 37109 N. Lava Lane S .102 .100 .099 .096 Central Phoenix, 1845 E. Roosevelt .123 .098 .089 .089 Falcon Field, 4530 E. McKellips, .113 .111 .101 .098 Fountain Hil ls, 16426 E. Pal isades .114 .107 .105 .101 Glen dale , 600 0 W . Olive S .101 .099 .097 .090 Humboldt Mt., Top of Humboldt Mt. S .124 .099 .098 .096 JLG Supersite, 4530 N. 17th Ave. .117 .110 .094 .088 Maryvale, 6180 W. Encanto S .119 .111 .108 .094 Mesa, 370 S. Brooks .097 .091 .083 .083 North Phoenix , 601 E. Butler .111 .104 .104 .100 Palo Verde, 36248 W. Elliot Rd. S .092 .090 .085 .085 Pinnacle Peak, 25000 N. Win dy Walk .115 .102 .101 .101 Rio Verde, 25608N. Forest Rd. S .101 .100 .099 .099 South Phoenix, 33 W . Tamarisk .104 .104 .091 .089 South Scottsdale, 2857 N. Mil ler .102 .094 .093 .092 Surpr ise, 1 8600 N. Reems .098 .091 .086 .086 Tempe, Apache Blvd . & Colleg e Ave. .100 .097 .096 .096 # Tonto National M onument, Maintenance Stat ion S .111 .107 .102 .097

W est Chandler, Frye Rd. & Ellis S .110 .101 .097 .096 W est Phoenix, 3847 W . Earll .123 .116 .097 .095

* Due to mathematical round ing, values $ .125 ppm are necessary to exceed the standard. # Indicates < 75% data avai lable. S Seasonal monitor

operating fro m April 1 to N ovember 1.
 !"#$"%"!%&'"%"!"%(#")*#%+#,"!-&#+( #%%#".%#$"%#/'%#$-"0#$)
"$1%#""$$($1#$.2$%%#+/#$(#%--"0#$1"#)$#'"1%--"0%-)%%(1#$*("%*"(.*%#%"#$.%(%-#1$(%-"02-72-8

Quality A

ssurance Prog ram One-hour

ozone data for the Mari c opa County ar ea has been coll ected and quali ty-assur ed in accordance with 40 C FR, Part 58, Appendix A, E PA’s “Quali ty Assurance H andbook for Air Pollution M easurement Sys tems, Volume II; Ambi ent Air Spe cif ic Methods” , the Maricopa Coun ty Ambient Air Monitoring Prog ram QA/QC Pro cedures, and the Arizona Department

of Environmental Quality (ADEQ) Quality Assurance Project Plan. The data are recorde d in t he EPA Aerometric Inf ormation Retrieval System (AIRS) and are also available for public review in air quality monitori ng r eports produced annually by the Maricopa County

Envi ronme ntal Services Department and the Arizona D epartment of Envir onm enta l Qua lity. APPROVAL OF THE OZONE NONATTAINMEN T SIP ELEMENT FOR THE MARICOPA COUNTY AR EA In accordance w ith the 1990 Cl ean Air Act Amend ments, the Mari copa County nonattainment

are a was ini tially classified as Moderate for oz one. In order to meet the Moderate area requi rements, the MAG 1993 Ozone Pl an was submi tted to the Environmental Protection Agency by November 15, 1993. An Adden dum to this Plan was submitted in March 19 94. On November 6, 1997, the nonattai nmentarea was reclassified to Serious due to failure to attai n the one-hour ozone standard by Novem ber 15, 1996. The Serious Area reclassification was effective on Febr uary 13, 1998. On December 14, 2000, the Ariz ona Department of Environmenta l Quality submitted the Final Serious Are a Ozone State I mplementation Plan for Maricopa C ounty to EPA. In accordance with Sectio n 110, a comple teness findin g o n the Final Serious Area Ozone State Implementation Pla n was deemed by operation of law since a determination w as not made by EPA w ithin six months of receipt of the Plan. W hile this latest

SIP has not been appr oved under Sec

tion 110(k), it is anti cipa t ed that EPA may approve the Final Serious Area Ozone Plan before this request for r

edesignation is submitted. If not, approval action on SI P elements of the Rev ised SeriousArea Ozone Plan and t he re desi gnat ion re ques t can occu r simu ltan eou sly. IMPROVEMENT IN AIR QUA LITY DUE TO PER MANENT AND ENFORCEAB L E EMISSION REDUCTIONS This section is intended to demon strate that the improved ai r quality in the Mari copa County nonattainment area has occurred as a resul t of per manent and enf orceable emissions reductions. The monitoring data clearly indicate that ozone conc entr atio ns ha ve declined steadilysince 1994. This continuous decl ine in emissi ons and concentra tions has occurred during a period w hen the area has ex perienced more than a 25 percent increa se in population, employme nt, and vehicle miles of travel. According to the EPA memorandum, Procedures for Proce ssing Requests to Redesignate Areas to Attainment, September 4, 1992, “The state must be able to reasonabl y attribu te2-9

the improvement i n air qual ity to emis sion reducti ons which a re perm anent and enforceable.” A s Figure 2-2 illustrates, there has been a cont inuous downward trend in ozone concentrations at all monitors in the nonattainmen t area. The fourth-h ighestozone levels decreased by 17 percent between 199 5 and 2002, at the sam e time populatio n , employment

and vehicle travel i n the nonattainment ar ea increased by

about 30 percent. Over time, several control measures have been imp le mented in the Maricop a County nonatta inme nt area wh ich have r esulted in the d ecline in ozone concentrati ons. For example, the Envir

onmental Protecti on Agency pub lished a final rule on May 27, 1998 determining that the Mari copa nonattainment ar ea has in place sufficient control measures to meet the 15 percent rate of progr

ess requi rement in the Cl ean Air Act. The F inal Ser ious Area Ozone State Implemen tation Plan submitted in December 2000 also incl ude d Reasonably Available Control Technolo gy (R ACT) requi rements for sources subject to RACT under the C lean Air Act

. In addition, the Revised MA G 1999 Serious Ar ea Carbon Monox ide Plan and MAG C arbon Monoxide Redesignati on Reque st a nd Maintenance Plan include measures which also reduce ozone . Many o f th ese m easu res h ave been included in this Ozone Maintenan ce Plan. The Maintenance Pl an described in the next chapter mode ls the year 2015. Table VI-2 in the One-Hour M aintenance Plan Tech nical Support Document summarizesthe emission reductionsattributable to control measu res in 2015. The next s ection descri bes the control measures for which numeric emission reduction credit was assume d in order to maintain the one-hour oz one standard thr ough 2015. ATTAINMENT AND M AINTENANCE C ONTROL MEASUR ES Gene rally, the overall approach taken in preparing the One- Hour OzoneMaintenance Pl an is to demonstrate mai ntenance of the one-hour oz one standard in 2 015 with thecommitted measures in the Rev ised MAG 1999 S erious Area C arbon Monoxi de P lan and Carbon Monoxide Redesignation Request and Maintenance Plan, since mos t of those measures also reduce ozone . Therefore, the O zone Mainte nance Plan rel ies heavil y upon the Rev ised MAG Serious Area Carbon Monoxide Plan and its sup porting documents, including the commitments toimplement control mea sures. The Ozone Maintenance Plan also relies upon the Final Ser ious Area Ozone Stat e Implement ation Plan for M aricopa County and themodified Ariz ona Cleaner Bur ning Gasoli ne Program. Detailed descriptio ns of the m easures a re contained i n Chapter Eig ht of the Revi sed Serious Area Carbon Monoxide Plan, (fifty-five mea sures) Chapters Two and Three of the Carbon Monox ide Maintenance Pl an, and Chapter Tw o of the Final Serious Area Ozone SIP for MaricopaCounty. The committed measures us ed for numeric emis sion reducti on credit in the Ozon e Maintenance Pl an for 2015 are desc ribed below . These m eas ures, which are permanent and en forceable, are ant icipated to be i n place throug h the maintenance year of

2015. Continued implementation of these measures, as well as the2-10

other measures in the aforem entio ned plans, will ensure c ontinuing r eductions in emi ssions through 2015 and beyond. 1. Summer

Fuel Reformulati on: California Phase 2 and Fede ral Phase II Reformulated Gasoline w ith 7 psi from M ay 1 throug h September 30 The Arizona L egislatur e pas sed H.B. 2307 in 1997 w hich contains requirements for the sale of gasoline from an d after May 1, 1999 in Area A, subject to an appr opriate waiver granted under Section 2 11 (c) (4) of the Clean Air

Act, that mee t s the follow ing fuel reformulation opt ions:

• California Pha se 2 Reformu lated Gasoline , including alternative formulations allowed by the pred ictive model, as adopted by the Calif ornia Air Resources Board pursuant to the California C ode of Regul ations, Title 1 3, Sections 2261 through 2262.7 and 2265, in effect on Januar y 1, 1997, that meets the ma ximum 7.0 psi summertime vapor pressure requireme nts in A.R. S

. Section 41-2083, Sub sections D and F.

• Gasoline that meets the standa rd s for Federal Phas e II Reformulated Gasoline, as provi ded in 40 CFR Section 80.41, paragraphs (a) through (h), in effect on January

1, 1997, that meets the max imum 7.0 ps i summe rtime vapor pressure requirement in A.R.S. Section 41 -2083 Subsect ions D and F. On February

10, 1998, the Env ironmental Pro tection Agenc y approved Arizona’ s cleaner burning gasoline ( CBG) prog ram into the S tate Implem entation Plan. The program was implemented in two s tages - from J une to September 1998, gasoline sold in the area had to meet the standardssimilar to Federal P hase I Reformulate d Gasoline or California’s Phase 2 Reformulated Gaso line. T h en, beginning May 1, 1999, all gas s old in the area had to mee t standards similar to Federal Pha se II or Cal ifornia’s Phas e 2 Reformulated Gasoline. Arizona’s CBG Program was included in the 1998 metropolitan Phoenix Ozone 15 Percent Rate of Progress Federal Implementa tion Plan as a committed contro l measure for emissions reduction credit. On July 6, 1999 , EPA finaliz ed a rule rev ising thefederal plan as it related to th e CBG P rogr am. On April 28, 2000, Senate Bill 1504 wassigned into law by the Governor

of Arizona. The law rev ised A.R.S. S ection 41-2124 by eliminating the maximum ox ygenate r

equirement for summertime gas oline in Maricopa Coun ty. Because of the cost and difficulty of blending ethanol in CBG and meeting the 7.0 psi Reid Vapor Pressur e standard, MTBE has been the primar

y oxy genate used in Arizona’ s summertime CBG

. On Sept emb er 29 , 200 3, th e Envi ronm enta l Prot ecti on Ag ency pu blished a notice proposing to approve r

evisionsto the Arizona Clean Burni ng Gasoline Program currently approved in the State Implementation Plan. The rev isions repl ace Ariz ona’s interi m CBG2-11

program with a permanent prog ram, amend the wintert ime CBG prog ram to limit the types of gasoline t hat may be suppl ied, and remove the minimum oxy gen requirem ent for summert ime gasoline. On January 26, 2004, the EPA Ad ministrator signed t he final approval notice for the r evisions to the Arizona Clean Burni ng Gasoline Program. The final notice was publi shed in the Feder al Regis ter on Marc h 4, 2004, effective on April 5, 2004. This measure is a committed measure in the State Implementati on Plan for ozone and a committed m aintena nce measure in t he Ozone Mai ntenance Plan. This measure accounts for a 1.8 percent

reduction in NO x emissions and 0.6 percent redu ction in VOCemissions in 2015. Additional info rmation on this measure can be found in the One -Ho ur Ozone Maintenance Pl an Technical Suppor t Document on pag e VI-6. 2. Phased-In Emiss ion Test Cutpoint s The Arizona Vehicle Inspection Maintenan ce Program w as established in 1976 to promote the clea n ope ratio n ofmoto r vehic les b y c ontroll ing vehicle ex haust emissions . The program is operated by the Arizon a Department of Env ironmental Qual ity and contains the provisi ons listed in S ection 182(c) (3) of the Clean Air Act for a n Enhanced Vehicle Inspection and M aintenance Prog ram. The Vehicle Emis sions Inspecti on Maintenance Pr ogram was sig nificantly enhanced and strengthened by the Arizona Legislature in 1993 (H.B. 2001). The Legislature established a biennial, tr

ansient loaded (I/M 240) emissions test for gasolinepowered vehicles model year 1981 or newer with a gross vehicle weight of up to 8,500 pounds, beginni ng January 1, 1995. In 1993, the A rizona Legislature passed H.B. 2001 which increased the rep air threshold limits for gasoline powered vehicles in order to be eligible for a waiver through the Vehicle Emissions Inspection Main tenance P rogram. The r epair limits were i ncreased in the following manner: 1967-1974 from $ 50 to $100; 1975-1980 from $200 to $300; and 1981 and newer from $300 to $450. The bill also incre ased the repair threshold li mits from $300 to $500 for diesel powered vehicles w ith tandem axl es or a gr oss vehic le weig htin excess of 26,000 pou nds. The Ari zona L egislatur e passed H.B. 223 7 in 1997 whi ch contained an appr opriation of $120,000 from the State Genera l Fund to the Arizona Depar tment of Environmental Quality to develop and implement an alternative test protocol to re duce the false failur e rates associated with the more string entpass-fail standards fo r the Vehicle Emissions Test ing Program (Section 19 of H.B. 223 7). In addition, the Arizona Departmen t of Environmental Quality was to implement Interim Test Cutpoints for t he Vehicle Emis sions Inspecti on Program unt il issues were resolved with the final test c utpoints for the I/ M 240 Pr ogram

. The Interim Cut points wer e selected to achieve thefollowing failure ratesin three vehicle clas s categori es (Light Duty Gasol ine Vehicles, Light Duty

Gasoline Truc ks 1, and Lig htDuty Gaso line Trucks 2: 50 percent for Model Years 1981- 85; 25 percent for 1986 to 1989 model years, and 10 percent for M odel Years 1990- 93).2-12

In August 2002, EPA proposed approv al of the Arizon a I/M Prog ram and signed th e final approval notice on Octob er 31, 2002. The final approval n otice was p ublished in th e Federal Register

on January 22, 2003. This measure is a committed att ainment measure in the Revis ed Serious Ar ea Carbon Monox ide Plan, a committed ma intenance measure in the Carbon Monoxide Maintenance Plan, an d a committed maint enance measure in the One-Hour

Ozone Maintenance Pl an. This measure i s estimated toprovide l ess than 0.1 percent increase in NO x emissionsand less th an a 0.1 percent r eduction in VOC emissions, i n 2015. Additional information on thi s measure can be found i n the Revi sed S erious Area Carbon M onoxide Plan on page 8-5, C arbon Monoxi de Maintenance Pl an TSD on page VII-1 0 , and the One-Hour Ozone Maintenance Plan Technical Support Document on page VI-11. 3. One-Time W aiver from Vehicle Emissions Test The Arizona L egislatur e passed S.B. 1002 in 1 996 which l imits the is suance of a wai ver for failure to comply with the emiss io n testing r equirements to one-time only beginning January 1, 1997 (A.R.S. 49-542 D). This mea sure is a committed attainm ent measure in the Revised Serious Are a Carbon Monox ide Plan, a commi tted maintenance mea sure in the Carbon Monox ide Maintena nce P lan, and a committed measure in the O ne-Hour Ozone Maintenance Plan. Thismeasure is es timated to prov ide a less than 0.1 percent red uction in NO X emissions and l ess than a 0.1 per cent reduction in VOC emiss ions, i n 2015. Additional information on thi s measure can be found i n the Revi sed Serious Ar ea Carbon Monoxide P lan on pa ge 8-10, Carbon M onoxide Mai ntenance Plan Techni cal Support Document on pageVII-11, and the O ne-Hour Oz one Maintenance Plan Technical Support Document on page VI-12. 4. Coord inate T raffic S ignal Systems The Arizona Legislatur e passed H.B. 2001 in 1993 w hich requi red that Mari copa County and the cities and towns i n the vehicl e emissions control area ( Maricopa C ounty nonattainment

area) synchronize traffic control signals on all roadways, within and across jurisdict ional boundaries, w hich have a traffic flow excee din g 15,000 motor vehicles per day. The synchroni zation of

existin g signal s, as wel l as the enhancement of coordi nation among signal systems th at are already synchroni zed, has been i dentified by many jurisdic tions through a number of progr ams. Enhancement effo rts r ange fr om lar ge scale pr

ogram s covering broad geog raphic areasto incremental additions of a few synchroni zed signals to the networ k. This includesboth indiv idual city projects and regional pr ograms, such as AZTech, also menti oned below. This measur

e is a commi tted attai nment measure in the Revised S erious Area C arbon Monoxide Plan, a committed maintenance measure in theCarbon Monoxide Maintenance Plan, and a committed ma intenance measure in the One-Hour Ozone Maintenance Plan. This measure is es timated to prov ide less than 0.1 percent reduction in NO x emissions and a 0.1 percent r

eduction in VOC

emissions, i n 2015. Additional information on this measure can be found in the Rev ised SeriousArea Carbon Monoxide P lan on page 8- 88, Carbon2-13

Monoxide Maintenance Plan TSD, on page VII-1 3, and the One-Hour Ozone Maintenan ce Plan Technical S upport Document on page VI-13. 5. Deve lop Intelli gent Tr anspor tation Systems Many local juris diction s have begu n plann ing and im pleme nting advanced techno logy based solutions to address complex traffic management i ssues on the re gional tr ansportation network. These technologies involve the application of electronics , telecommunications

and sensor technologies and are collectively referr ed to as Intellig ent Transportation Systems (ITS ). Akey component of the regional Intellig ent Transportati on Infra structure i s the Freeway Management

System (F MS) operated b y the Ari zona Depar tment of Transportation (ADOT). The FMS curr ently covers 42 miles of the freeway

system and pr

ovides ser

vices such as t raveler advisories and incident management. The other major regional IT S init iati ve is the AZTech pr oject. This pr

oject wasselected and funded by USDOT to serve as one of four ITS Model Deployment I nitiatives in the nation. Key elements of th e AZTech project are the inter

connection of 13 local traffic management centers and the instrumentation of eight “smar t” corri dors that cover nearly 150 miles of arterial streets

. This measure is a committed att ainment measure in th e Revise d Carbon M onoxide Seri ous Area Carbon Monoxide Plan, a committed maintenance mea sure in the Carbon Mo noxide Maintenance Plan, and a committed measu re in the One-Hour Ozone Maintenance Plan. This measure accounts fo r a less than 0.1 percent increase in NO x emissions and less than 0.1 percent

reduction in VOC emissio ns, in 2015. Addi tional informati on on this measure can be found in the Revised Serious Area Carbon Monox ide Plan on page 8-31, C arbon Monoxide Maintenance Pl an TSD on page VII -14, and One-H our Ozone Mai ntenance Plan Technical Support

Document on pageVI-14. 6. Tougher Enforcem ent of Vehicle Registration and Emissions Test Compliance The Motor Vehic le Divi sion (MVD ) of the Ariz ona Departm ent o f Transp ortati on (AD OT) has insti tuted a comprehensi ve vehi cle regi stration enforce ment program. Three key elements of the new program are a Regis t ration Enforcement Team, a Registr ation Enforcement

Track ing S yste m, a nd a New Resident Tracking Program. Through public participati on, consistent pol icy and pr ocedure application, and new tracking methods , MVD will enforce the Arizona registr ation laws

to ensure vehicles in q uestion are r eg istere d properly . This wi ll be an ongoi ng effort. Another phase of the Program is an init iati ve to coord inate ADOT efforts w ith other law enforcement

agencies to assist MVD pers onnel in enforcin g regis tration compli ance. Other initiatives include a system user agreement between MVD and th e City Courts to uti lize information in conj uncti on with registration compliance and discussions with U.S. W est (now known as Qwest) for obtaining information relating to new connect cust omers. The Arizona L egislatur e passed S.B. 1427 i n 1998 which requires school dist ricts and special districts in Area A to prohibit par king in empl oyee parki ng lots by employees w ho2-14

hav e n ot complied with emissions testing requirements. Cities, towns, and cou nties in Area A and Area B are currently subject to this provision (A.R.S. 49-552 ). In 1999, th e Arizona Le gislature passed H.B. 2254 which requires each vehicle that is owned by

the United States government and that is domiciled in this state for more than ninety consecutive days and eac h vehicle that is ow ned by a stateor political subdivi sion of this state to comply w ith A.R.S. 49- 542. Colle ctive ly, the provi sions in H. B. 22 54 that app ly to Tougher Enforcement of Vehicle Registr ation and Emi ssion s Test C omp lia nce include A.R.S. 49-557 an d 49-541.01 D. and E. This measure is a committed conting ency measure in the Rev ised Serious Are a Carbon Monoxide Plan, a committed maintenance measure in the C arbon Monoxide Maintenance Plan and a committed measur e in the One-H our

Ozone Mai ntenance Plan. This measure accounts for a 0.1 percent reduction in NO x emissions and a 0.1 percent reduction in VOC emissions in 2015. Additi onal information on this measure can be found in the Rev ised Serious Area Carbon M onoxide Plan on page 8-13, C arbon Monoxi de Maintenance Pl an Technical Support Document on page VII-1 5, and One-Hour Maintenance Pl an Technical Support Document on page VI-16. 7. Maricopa C ounty Rule 348: Aerospace M anufacturing and Rework Operations Maricopa County

adopted Rule 348 on A pril 4, 1999to impl eme nt reaso nably available control technology

(RACT) for aer

ospace manufacturing and rework operations. The rule was approved i nto the State Implementation Plan effective November 19, 1999 (see 64 FR 50759). The purpose of the ru le is to li mit the emissi ons of volatil e organic compound s from the manufacture and rework of aerospace vehicles and their components. Some of the vehicl es included in Rule 348 are airplanes, helicopters, missiles, rocke ts and space vehicles. The SIP approved measure is a R ACT measure in theFinal Seri ous Area Ozone Sta te Imp lement ation Plan for Mari copa County and a RACT and commit ted measure in the One-Hour

Ozone Mai ntenance Plan. Rule 348 has a control efficienc y of 3 percent and a rule effective ness of 80 percent for SCC codes 3139 9999, 39 99999 9, 40200701, 40100901, 40203001, 40299999, 40400213, and 40799999. This measure accounts for a less than 0.1 percent reduction in VOC emissions. There is no expected ef fect on NO x emissions. Additional information on this me asure can be found in the Final Serious Area Ozone SIP on page 2-4 and the One-Hour Ozone Mai ntenance Plan T echnical Support Document on page VI-17. CLEAN AIR AC T SECTIO N 110 A ND PAR T D REQ UIREM ENTS Before an area can be redesignated to at tainment, it must me et the require ments of Section 110 and Part D of the C lean Air Act

. The provisions of Section 110(a )(2) and Part D are requi red as part of the State Implementation Plan to bring the Mar icopa Cou nty nonattain men tarea into attai nment, and have been addressed in pl an submissions2-15

currentlyunder rev iew by EPA. EPA h as in dica ted t hat t hey exp ect t o app rove the Revis ed MAG 1999 Serious Ar

ea Carbon Monox ide Plan for the Maricopa County N onattainment Area in 2003, wh ich includes several of the same measures r elied upon for the One-Hour Ozone Maintenance Pl an. It is al so an tic ipated that EPA w ill approve the Carbon Monoxide Redesignation Request and Ma i ntenance Plan and theFinal Seri ous Area Ozone State Implementation Plan for Maricopa County in the near future. Upon appr

oval of the plans, EPA will have determined that all ap plicable pr ovisionsof Section 110 and Part D have been met

. The following section li sts the applicable requir ements of Section 110 and Part D and provid es references from the Revis ed Serious Ar ea Carbon Monox ide Plan, Carbo n Mon oxide Maint ena nce P lan, and F inal Serio us Are a Ozo ne Plan that address those requirements. Section 110(a) (2) addresses g eneral req uirements for State Implementati on Plans. The following discussion indicates how each of these requirements is addresse d in the Revis ed Serious Area Carbon M onoxide Plan and other plans a s app ropriat e. The numbers in parentheses indicate the s ubsection of the following narrative in which each of the Section 110 (a)(2 ) requ irem ents is add resse d bel ow. (A) Include enforceablemeasures and sc hedules necessar y to show

compliance. ( 1) 2. Monitor and compile data on ambient air qual ity. (2) 3. Provide a progr am to enfo rce measures in (A) and regulate stationary sources. (1),(4) (D) Prohibit sources from emit ting pollu tants that would contribute significan tly to nonattainment, i nt erfere wit h maintenance of the stan dard, or inter fere with Prevention of Significant D eterioration (PSD) or visibi lity i n other states. (3) 5. Provide assurances t hat there are adeq uate resources to implement the p lan, nothing in the SIP is

otherwis e prohibited by law, an d the St ate has responsi bility for ensuring adequate implementat ion. (1) 6. Stationary

source emiss ions monitori ng and report ing. (4) 7. Provide for emergency powers auth ority. ( 5) 8. Provide for the revis ions to the plan . (6) 9. Meet the applicable requir ements of Part D for n onattainment areas. (10) 10. Meet

the requirements of Section 121 (consultation). (9);Section 12 7 (public notification);( 7) and part C (PSD and v isibilit y). (3) ,(4) 11. Perform air q uality model ing. (8) 12. Permitting fees for major stati onary sour ces. (4) 13. Consultation and particip ation by local political subdivis ions affected by the SIP. (9) (1) Enforcement, Adequate Resou rces, and Res ponsibility for Adequate Implementation Sections 110(a)(2)(

A), (C) and (E) concerning plan enfor cement a nd implementation requirements

are addressed in Chapter Eig ht (page 8-1 46) and Chapter El even (pag e 11- 1) of the Revis ed Serious Ar ea Carbon Monox ide Plan. In or der t o com ply with these sections, a State law

was passe d in 1992 whi ch provid es an approach for a ssurances that2-16

State and local committed measureswill be adequately implemented (A.R .S. Section 49- 406 I. and J.). Regarding committed measures , A.R.S. Section 49-406 G. (passed by the Legislature in 1992) requires

that each agenc y which commits to implement any control measure contained in the State Impl ementation Plan must describe the commitment in a res olution. The resolution mus t be adopted by the appropriate governi ng body of the agency. State law also requi res th e ent ity to spec ify the following information in th e resolutions : (1) its authority for implementing the limitatio n or measure as prov ided in statute, ordinance, or rule; (2) a program for the enforcem ent of the limitation or measu re; and (3) the lev el of personnel and funding allocated to t he implementation of the measure. Chapter Eleven of

the Revis ed Serious Ar ea Carbon Monox ide Plan includes r esolutions from the MAG member ag encies and other implementi ng entities . The resoluti ons indicate specific commitments to impl ement various control str

ategies. Ge nerally, the authorities of cities and towns to im plem ent t he typ es of mea sure s tha t the y have committed to in their re spec tive resolutionsare provi ded under A.R.S. § 9-240 Power s of Common C ouncil

. The general auth orities of the County to implemen t the measures in the comm itments are provided under A.R.S. §11-251 and A.R.S . § 49-478. Copies of these l ocal and county government

auth oriti es ar e inc lude d in Ch apte r Eleve n of the Revis ed Serious Ar ea Carbon Monox ide Plan. If any pers on (includes State, County , local go vernments, r egional ag encies, and other entities) fails to implement a committ ed mea sure, the County would file an action in Superior Courtto have the C ourt order th at the measure be i mplemented. Likew ise, the Director of the Arizon a Department of Env ironmental Qual ity w ill backstop the County if it fails to imple ment a com mitted measure or if the County

fails to backs top the local governments

and r egional ag encies (see A ppendix C, Exhibit 2, Revised Serious Area Carbon Monoxide Plan). (2) Monitoring and Compiling of Data on Ambient Ai r Quality Section 110(a)(2)( B) establ ishes the req uirement to monitor , compile, and anal yze ambie nt air quality data. Appendix A, Exhibit 2 of the Revis ed 1999 Serious A rea Carbon M onoxide Pl an contains the 1992 Memorandum of Agr eement for Air Qual ity Planni ng. Thi s agreement

identifies Maricopa County and the Arizona Department of Env ironmental Quality as having the primaryroles for air quality monitoring, including special purpose air quality and meteorologi cal monitori ng for plan development. Chapter Four of the Revised Serious Are a Carbon Monox ide Plan (pag e 4-5) prov ides additional evidence that the monito ring require ments for the region are being me t through the efforts of th e Maricopa County Environmental Service s Depa rtme nt and the Arizona Department

of Environmenta l Quality . Arizo na Statutes 49-406. Nonattainment areaplan and 49-424. Duties

of Department

provide the regulatory basis for air quality monitoring in the State and any nonattain ment areas. Addi tional information on the current ambient air2-17

quality monitoring network ope rated in the M aricopa nonattainment area is detailed ea rlier in this chapter. (3) Provisi ons to Prohibi t Sources from Impac ting Air Quality in Other States Section 110(a)(2)( D) requi res that a SIP contain adequateprovisi ons prohibiti ng a ny source or other ty pe of emissions act ivity within the State from emitting any air pollutant in amounts which w ill contr i bute significantly to nonat tainment in, or interfere w ith maintenance by, any other S tate with respect to any such national primary or secondary ambientair quality standard; or interfere with measur es requir ed to be included in the applicable implementation pl an for any other State under Par

t C to prevent significant dete riora tion of a ir qua lity or to pro tect visibi lity. Visib ility, as defined in Par t C of the Clean Air

Act, is currently addr

essed through a Federal Implementation Plan for the State of Arizona. The lack of prox imity to another statemakes itunlikely

that ozone e missions ar e transported fro m the nonattainment ar ea to another state. 4. Preconstruct ion Review for All New

and Modi fi ed Stationary Sources; Stationa ry Source Emissi ons Monitori ng; and Permit ting Fees for

Major Stati onary Sources The requirement

s of Sections 110( a)(2)(C) , (F), and (L) co ncer ning p reco nstr ucti on re view, emissions monitoring, a n d permitting fees for stationary sources areaddressed by the State in Title 49. Artic le 2. State A ir Polluti on Control, and Article 3. County Ai r Pollution Control, of the Arizona Revised Statutes. Complian ce wit h thi s requir ement is the responsibil ity

of the Arizon a Department of Env ironmental Qual ity or ap plicable count y agen cy. Appendix A, Exhibit 2 of the Rev ise d Plan containsthe 1992 Memorandum of Agreement

for Air Quality Planning. This agreement ident ifies Maricopa County ashaving the lead role for stationa ry source emissions control. Followi ng adoption by t he State, Mari copa County adopted new sour ce review

regulati ons d esigned to prevent significant deterioratio n of air quali ty, pattern ed after the State regulations. The Mar ico pa County R egulations contain requi rements for obtaini ng installati on permits for new major s ources lo cated in nonattai nment, attainment, or unclassifiable areas. Both th e State and MaricopaCounty new source rev iew reg ulations are currentl y in effect. The Maricopa C ounty Air Pollution Con trol Regu lation s cont ain the regul ations that constitute the legal basis for control of air pollution so urces in Maricopa C ounty, Ari zona. They are adop ted to implement the policy set forth in Title 49 of the Arizona Revise d Statutes and to fu lfill the State ’s responsi bilities u nder the Federal Clean Air Act and its amendments to provi de a legally enforceable StateImplementation Pla n for the attainment and maintenance of the National Ambie nt Air Quality Standards. Applicable Maricopa C ounty Air Pollution Con trol Regu lations include; Rul e 240 - Permits for New Major Sources and Major Modifications to Existing Major Sources , Rule 241 -2-18

Permits for N ew Sou rces a nd Mo dif icat ions to Exi sting Major Sources, and R ule 245 - Continu ous Sou rce Emiss ion Monit oring. (5) Provide for Authority Comparable to tha t in Section 303 for Eme rgency Powers Section 110(a)(2)(G) addresses the authority for em ergency powers. Under Secti on 303 of the Clean Air

Act, u pon receipt of evidence that a pollution so urce or combi nation of sources (including mov ing s ources) is presenting an imminent and subs tantial endangerment

to public heal th or wel fare, or the environment, the EPA Administ rator may brin g s uit on behalf of the Uni ted States in theappropriate U nited States di strict cour t to immediately restrain any person causing or contributing to the alleg ed pollution tostop the emission of ai r po llutants caus ing or cont ributing to such pollut ion or to take such other action as may be nece ssary. I f it is no t practicable to assure prompt prote ction of public health or welfare or theenvi ronment by comm encement of such a civ il action, t he Administrator

may is sue s uch o rder s as m ay be n eces sary t o pr otect public h ealth or welfare or the environ ment. Emergency powers for the State of Ari zona are addr essed under

A.R.S. 49-465. Imminent and substantial e ndangerment, 49-462.07 Violation; inj unctive relief, and 49-465 Air Poll utio n Eme rgenc y. (6) Provide for

Plan Revi sions to Acco unt for Changes to t he NAAQS or When a Plan is Found Substantially Inadequate to Attain a Standard Section 110(a)(2)( H) requi res a plan revisi on to take account of revisi ons of such national primaryor secondary ambient air quality standard, or the availability of improved or more expeditious

methods of attaining such standard, and whenever the Administ rator finds that the plan is su bstantially inadequate to a ttain the national ambient air q uality s tandard. A.R.S. 49-404 State Implementation Plan and 49-406 Nonattainment Ar ea Plan prov isions provide for State, county , and local ag encies to revis e the SIP to account for cha nges to air quality standards or if

a plan is found to be inadequate. The applicable doc umentation for making plan revi sions can be found i n the Revi sed 1999 Serious Ar ea Caron Monox ide Plan, Ap pendix A, Exhibit 2, 1992 Mem orandu m of Agre ement for Air Qu ality Plan ning. (7) Meet the Appli cable Requi rements of Section 127 (Relating to Public Notification) Sec tion 110(a)(2)(J) requires a plan revision to meet the applicable require ments o f Section 127 relating to Public N otification. Public notification procedur es followed for

the Revised Serious Are a Carbon Monox ide Plan are doc umented in the sect ion, Pub lic Participati on in the Prepar ation of the MAG 1999 Serious AreaCarbon Monox ide Plan and MAG 1999 Serious Area PM-10 Plan, in Chap ter Ten (page 10-3).2-19

(8) Air Qualit

y Modeli ng Section 110( a)( 2)( K) p rov ides for t he pe rfor manc e of s uc h air qual ity modeli ng as the Administrator

may prescribe for

the purpose of predi cting the effect on ambient air q uality of any emissi ons of any air pollutant for

which theAdministrator has establis hed a national ambientair qual ity standar d, and the submiss ion, upon req uest, of data related to such air quality modeling to t he Administrato r. As docu mented in Cha pter 2 of the F inal Serio us Are a Ozon e SIP for M arico pa Co unty, t he MAG 1993 Oz one Plan for the Ma ricopa County Area was submitted to EPA on November

15, 1993, followed by an Addendum i n April 1994. The 1993 Ozone Plan w as designed to meet the Moder ate Area ozonerequirements. The Modeling Attainment Demonstration for the 1993 Plan was submitte d in November 1994, and in Apri l 1995, the revisi ons to the Modeling Attainment Demonst ration we re submitted. E PA determined the submissions to be complete on M ay 12, 1995. Eff ecti ve June 26, 1998, the Envir onmental Protecti on Agency then promulgated a Federal Implementation Plan whi ch demonstrated the 15 Percent Rate of Progress

goal would be met by April 1, 1999 (see 63 FR 28898, May 27, 1998). On July 6 , 1999, EPA finalized a rule to make minor changes to the FIP (see 64 FR 36243). On M ay30, 2001, EPA publi shed a final determi nation that the Phoen ix metropol itan Serious ozone nonattai nment area had attai ned t he one-ho ur ozone standard by the required Clean Air Act deadl ine of November 15, 1999. Based upon that determination, EPA also determined that the Clean Air Act’srequirements for reasonable further progress and attainment demonstr ations for

the one-hour standard are not applicable for so long as the Phoenix metr

opolitan area continues to attai n the one-hour ozone standard. In this One-Hour

Ozone Redes ignation R equest and Mai ntenance Plan, Ch apte r Thre e describesthe air qua lity mode ling f or the ma intenance demonstr ation. The air quality modeling is described in detail in theTechnical Suppor t Document (TSD)

Ozone Model ing in Support of the One-H our Ozone Redes ignation R equest and Mai ntenance Plan for the Maricopa County No nattainment Area. Chapter VI includes several key elements of the ozone model ing, including identi fication of f uture years, committed control me asures, future year emiss ion inventories, and maintenance demonstration. (9) Consultation a nd Participat ion by Local Political Subdivis ions Affected by th e SIP Evidence for consultati on and partici pation by l ocal politi cal subdiv isions affected by the SIP can be found in Chapter Ten, Public Participati on in the Rev ised MAG 1999 S erious Carbon Monoxide Plan (page 10-1). The decisi on-making structure of the Maricopa Association of Governments i ncludes twenty-fiv e cities and towns, the Sal t RiverPimaMaricopa and Gila Ri ver Indian Commu nities, Maricopa County and the Arizona Department of Transpor tation. Appendix A, Exhibi t 2 -1992 Memorandum of Ag reement for Air Quali ty Planning from the Revised MAG 1999 Serio us Area Car bon Monoxide Plan, and Chapte r One of this2-20

documentdetail the consultation and participat ion process for development of

the local air quality plans. (10) Meet the Appli cable Requi rements of Part D The requirement

for Nonattainment Plan Provisions are esta blished in Part D, Subpar t 1, Section 172(c), and i n Subpart 2, Sect ion 182

. Section 172 li sts general nonattainment plan provisi ons, and Subpart 2, Section 182 li sts additional provisi ons for ozone nonattainment

areas. In thos e instances w here an area is subject to both the general nonattainment

provisions in subpart 1 as well as one of the pollutant-sp ecific subparts , the g e neral provisions may be subsumed within, or superseded by, the mo re specific requirements

of Subpart 2. Subpart 1, Secti on 172(c), N onattainment Plan Pr ovisions 1. I mplementall reasonabl y avai lable control measures as ex peditiou sly as practicabl e The fifty-five control measures in Cha pter Eight of the Revised Serious Are a Carbon Monoxide Plan (page 8-5) have been implemented. M any of these measures reduce ozone as well as carbon monox ide and go w ell beyond r

eason ably av ai lable control measure s. T he effective implementation of the measures in the adopted plan was an important

element in achi eving at tainment before the r

equired date of December 31, 2000 for carbon monoxi de and November 15, 1999 for ozon e. Effective and ex peditious implementation of the co ntrol m easures resul ted in meeting the standard before t he attainment

date and will also ass ist in the continued maintenance of that standard . The Final Serious Area Ozone SIP also contains reason ably available control tech nologie s which reduce volatile organic compounds (Chapter 2 on pa ge 2-2 and Appendix A). In addition, the M aricopa County Environmenta l Servi ces Department r eviews the im plementation status of the various measures contained in th e air qual ity planson a n annual basis. In order to accurately monitor or tr ack plan implementation, the Mar icopa County Environmenta l Servi ces Department req uests that the i mplementing agencies and jurisdict ions complete an annual progress report form. The Env ironme ntal Servi ces Department

review s and summarizesthis informatio n, preparing an implementation s tatus report, and then presentsthe report to the MAG Air Quality Technical Adv isory C ommittee. The most recent p rogress rep ort at the time of the Revised 1999 Serious Ar ea Carbon Monoxide Plan was the MAG Air Q uali ty Plan 1996 Annual Progr ess Report ( July 1998) thatw as provid ed in Appendix B, Exhibi t 2 (see alsoChapter 8 Trac king Plan Implementation , page 8-146). 2. Plans shall require reasonable furthe r progress In Part D of the C lean A ir Act, Secti on 171 indicatesthat the term “ Reasonable Fur ther Progress” me ans such “annual increment al reductions in emissions of th e relevant air pollutant as are req uired by t his part or may reasonabl e be requir ed by the Admini strator2-21

for the purpose of

e nsuring attainment of the applicable national ambi ent air qual ity standard by the applicable date .” On May 30, 200 1, the E nvir

onme ntal Protection Ag ency publi shed a final Determination of Atta inment of the One-Hour Ozone Standar

d for the Phoenix

Metropolitan Area, eff ecti ve June 29, 2001. EPA indicated that because the ar ea has monitored attainment of the standard based on existi ng controls , additional meas ures or demonstr ations to show attainment

would not b e necessary . Also, EPA i ndicated that further emission redu ctions to meet the Reasonable Further Progress/Rate of Progress provisio ns of sections 172(c )(2) or 182(c)( 2)(B) for Ser ious Areas have already been fulfilled (see 6 6 FR 29233, May 30, 2001). In the May

10, 1995 EPA

memorandum regarding “Reasonable Further Progress, Attainment

Demonst ration and Relaxed Requirements for Ozone N onattainment Areas Meeting the Ozone National Ambient Air Quality Standa rds,” EPA indica tes that the requirements

relating to the attainment de monstration an d rea sonable further progress demonstration ar

e not requir

ed as long asthe area conti nues to meet the stan dard. H owever, in order to track the progress of the mainte nance plan, periodic e missio n inventori es will be prepared every three years in accordance w ith Section 182(a) (3) of the Clean Air Act. Maricopa County w ill coordi nate and compile the i nventory with in putand assistance from the Ariz ona Department of Environmental Quality, ArizonaDepartment of Transportation, and Maricopa Association of Governmen ts, as described in the 1992 Air Quality Memorandum of Agr

eement. Changes in the i nven tory will b e review ed and evaluated throu gh t he regional air qual ity planni ng process to determine if addi tional measures should be considered. 3. Plans shall incl ude a comprehensive, accurate, c urrent invento ryof actual emissions from all sources of the rel evantpollutant or pollutants in the area and periodic r

evisions The Clean Air Act requires a comprehensive, accurate, and curren t inventory of actual emissions from all sources. On April 1, 1993, the 1990 bas e year emission inventory for the Maricopa County ozone nonattainment areawas submit ted to EPA. Ful l approval of the inventory

became effective on June 26, 1998 (s ee 63 FR 28898, M ay 27, 1998). The 1996 base year (July t hrough September 1996) ozone i nventory was submitted as part of the Final Ser ious Area Ozone SIP, Appendix E. The 1999 Pe riodi c Ozo ne Emi ssions Inventory for the Maricopa County N onattainment Area is included in this One- Hour OzoneRedesignation Request and Maintenan ce Plan in Appe ndix A , Exhibit 1. The document incl udes a complete des cription of the s ources and methodology used to calculate ozone em issions. The 1999 inventory was submit

ted to EPA in Augu st 2002. The sources o f emis sions are gr ou ped into five maj or categor ies: area, nonr oad mobile, onroad mobile, bi ogenic, and poi nt. Collectiv ely these fiv

e sources cont ributed a total of 266 metric tons of NO x and 307 metric tons of volatil e organic compounds per day in 19992-22

(see Table III-7 on pag e III-34 in the Technical Sup port Document for t he One-Hour Ozone Redesignation Request and Maintena nce Plan). In addition, the One-Hour Ozone Redesignatio n Request and Maintenance Plan contains a descriptio n of the base year 1998 and 1999, the interim year 2006, and the maint enance ye ar 2015 ozone pre cursor emis sion inven tories for use in the Urban A irshed Mode l simulations(see Chapter Three of the One-Hour Ozone Maintenance Pl an and Section III of the Technica l Support Document f or the One-Hour Ozone Maintenance Plan ). The Maricopa C ounty

Environmental Services Department has com menced work on the 2002 periodic emissions i nventory . It is anti cipated that the inventor

y wi ll be completed by the second quar

ter of 2004. 4. The plan provisions shall id ent ify and quanti fy the emissi ons of any poll utant allowed from the c onstruction and operatio n of major new or modified stationary sources in t he area Chapter Th re e of the One-Hour Ozone Redesi gnation Req uest and Maintena nce Plan describesstationary source emiss ions, includ ing major new or modi fied sources. S ection III i n the Technical Su pport Document for the One-Hour O zone Redesi gnation R eques t and Maintenance Plan documents the impacts from major stationary sources. The1992 Memorandum of Agreement for Ai r Quality Planning found i n Appendix A, Exhibit 2, of the Re vised MAG 1999 Serious Area Carbon Monoxide Plan pro vides the distri bution o f responsibil ities for local air quality plannin g. The Maricopa County Env ironmental Ser vices Department

regulatesstationary

sources in Maricopa County thr ough the Mar icopa County Air Pollution C ontrol Reg ulations, inc luding Reg ulation II - Permit and Fees, and Rule 240 - Permit Req u irements for New Major Sour

ces and Major

Modificationsto Exist ing Major Sources. Section 172(c)(4) re quires an a rea, in d eve lopi ng i ts p lan for a ttai nment , to iden tify expected emissionsincrease s that wi ll result from new or modi fied major sources in a "zone to which economic devel opment should be ta r geted" accordi ng to Section 173(a)(1)( B). These prov isions effectively allow the State to provide a"g row th allowance" for sources i n such an area i n lieu of the offset requi rements under S e ction 173(a)(1)(

A). Since th is is an opti onal alternati ve to req uiring th e acquisit ion of offsets under Section 173(a)(1)(A), it is not a prerequis ite to redesi gnation. Moreover, once the area is red esignated attainment, these p rovisions will not apply s ince the Prevention of Significant D eterioration (PSD) re quirements of Par t C wil l become effective. 5. The plan provi sions shall require permits for the construct ion and operation of new or modified major stationary sources any

where in the nonattainment ar ea Gene rally, the requir

ements of the Part D New Sou rce Rev iew (N SR) permitti ng nonattainment

program w ill be repl aced by the Pr evention of Significant D eterioration (PSD) program once an area is redesignated to attainment. H owever , to ensure that the PSD program can become fu lly effective immediately upon redesignation, EPA will require2-23

an area to ma ke any

needed NSR cor rections to t heir Part CNSR prog rams prior to redesignati on. Maricopa County received SIP approval of its major and minor sou rce NSR program in 1988 (see 53 FR 30220, 53 FR30224, an d 53 FR 30238, Aug ust 10, 1988). Eff ecti ve November

2 2, 1993, EPA del egated Prevention of Signi ficant Deterior ation (PSD)

authority to Maricopa C ounty vi a a PSD Delega tion Agreement. On August 15, 1994, ADEQ submitted a SI P re vi sio n con tain ing por tion s of the State permitting program that are applicable to major sour ces, major sou rce modification s, and minor sou rces. Part of the SIP revision, under a separate cover, included applicable Maricopa County r ules, pertine nt to the NSR/PSD program. The amen dments to Maricopa County Rule s 100, 200, 210, 220, 2 40, and Appendix B were submi tted as a rev ision to the N SR/PSD prog ram. The submittal also reque sted approval of synthetic minor provisions under Section 1 12 (l) of the CAA. On September 1, 199 4, EPA deemed bot h the ADEQ a nd Maricopa C ounty SIP revisi on complete and each is cu rrently awaiting full approva l. To assure ad equate SIP revisi ons required by Section 110(a)(2)( E) of the CAA, the Director

of ADEQ is authorized under ARS §§ 49-402B to assert j urisdicti on over major NSR/PSD and minor NSR sources, excluding those located on Indian Reserv a tions. ADEQ received SIP approval of its NSR/PSD program effective May 3, 1983and delegatio n of PSD authority for PM-10 effective Marc h 12, 1999. The EPA guidance memorand um, Part D New Source Review (Part D N SR) Requi rements for Areas R eques ting Redesi gnation to Attainment, October 14, 1994, states t hat “nonattainment

areas may be redesignated to attainment no twi thstandi ng t he l ack of a fully-appr

oved Part D NSR

program, pr

ovided the pr

ogram is not rel ied upon for maintenance.” In addition, t he EPA guidanceindicates tha tPart D NSR rules do not n eed to be placed in the contingency portion of th e maintenance plan . It is important to notethat the One-Hour Ozone Maintenance Pl an for the Maricopa County nonat tainment area does not rely on credit for th e NSR prog ram to demonstrate maintenance. 6. Include enforc eable e missi on lim i tations and other contr ol measures, means , or techniques, as well as schedules and ti metable for compliance to provi de for attainment ofsuch standard Since attainment has been achieved, no additional measures are nee ded to provi de for attain me nt. T he need for additio nal measures to ensure tha t maintenance contin ues is addre ssed under the req uirements for maintenance plans. Ar eas should consi der the nee d for offsets under the Part C progr

am to ensure that new sources do not "cause or contribute" to an increas e in pollutant lev els that would take the area out of compl iance. 7. Plans shall meet the applicabl e requirement s of Section 110(a) (2) In the requests

for SIP redesignat ion, States must show that th eir plans s atisfy the requirements

under Section 110. These req uirements speci fy that the plans must contain enforceable emi ssio n limits, moni toring r equirements, procedures to prevent interstate pollution problem s, adequ ate resourcesto carry out the control programs, and other2-24

provisi ons related to the development a nd administrati on of effe ctive air pollution con trol programs. The Arizona Revised Statutes Title 49-40 1 through 470 contain the requir ements for

the State Air Pollut ion Control Program admini stered bythe Ariz ona Department of Environmental Quality. Also, th e Ar izona Rev ised Statutes Ti tle 49-471 thr ough 516 contain the re quire men ts fo r the Coun ty A ir P ollution Cont rol Progr am. The Maricopa County Environmental Services Department is the local ai r pollution control department for Maricopa County. I n addition, the State and local government commitments to implement specific air quality measures address the actual impl ementation and resources necessary for a wide variety of measur es. The Commitments d ocuments whi ch accompany t he Revised MAG 1999 Seri ous Area Carbon Monox ide Plan incl ude the State leg islation and local government commitments for measure implementati on. The Final Serious Area Ozone SIP for Maricopa Count y also includes the Reasonably Available Control Technology Rules designed to control VOC emissions. A list of Ma ricopa County Ozone Nonattainment Area Con trol Me asures is pr ovided in A ppendix A of the document. The Arizona S IP already includes the provisi ons required by Section 110(a)(2) an d Part D of the Clean Air

Act. In approv ing the Revised MAG 1999 Serious Are a Carbon Monox ide Plan, Carbon Monoxide Redesignation Request and M aintenance Plan, and Final Seri ous Area Ozone SIP EPA

will be determining that the State hasmet the requi rements of Section 110(a) (2) and Part D of the Clean Ai r Act. 8. States may use eq uivalent techniqu es for m odelin g, emission inventories, pla nning procedures unless they are less effectiv

e t han the methods specified by the Administrator The provis ions of S ecti on 17 2(c)( 8) all ow the State to use eq uivalent techniques for model ing, inventorying, or other planning act ivi ties unless EPA determines th at the te chniques are less effectiv e. This allow

ance wil l continue to ap ply w ith respect to the requirements

of the maintenance plan. 9. Provide for specific contingency measures to be undertaken ifthe area fails to make reasonable further progress, or to attain the N AAQS by the app licable attai nment date The Section 172(c )(9) req uirements for cont ingency measu res are dir ected at ensuri ng reasonable further prog ress and attai nment by the appl icable date. These requirements no longer appl y when a n area has attai ned the standard and is eligibl e for

redesignat ion. In the D eter mina tion of A ttain ment of the One -Hour Ozone Standard for the Pho enix Metropolitan Area, effective June 29, 200 1, EPA also determined th at the Clean Air Act requirements

for contingenc

y measuresare not applicable to the area for so long as the Phoenix metropolitan area continu es to attain the one-hou r ozone st andard (see 66 FR 29230, May 30, 2001).2-25

Section 175 (A) for maintenance plans provides specific requirements fo r contingency measures that effectively supersede the r

equirementsof Section 172(c)(a) for the se areas. The One-Hour Ozone Redesignation Request and Ma intenance Plan includes contingency provisi ons and measures. The three contingency measures are: Area A Expansion, Gross Polluter O ption for I/M Program W aivers, and Increased W aiver Repair Limit Options. Em issions reduction credit for these con tingency measures was not taken in th e mainten a nce demonstration. The se contingency measures and othe r contingency provisi ons are described in Chapter Three of the One-Hour Ozone Redesignation Request and Main tenance Plan and Sec tion VI of the Technical Support Doc ument for the One

Hour Ozone Maintenance Pl an. Subpart 2, Section 182( b), Plan Sub missions and Requirements, Serious Area Requirements 1. Meet requi rements for Moder ate nonattainment ar

eas 1. Emissions Inventory The State is requi red to submit a comprehensive, accurate, and current emiss ion inventory of all sources as described in Section 182(a)(1). Th is requirement was also address e d earlier in paragraph 3 of the require ments for Subpart 1, Section 172(c )(3), Nonat tainment Plan Provisi ons. On May 27, 1998, the EPA approved t he 1990 base year emission inventory submitted in theMAG 1993 Oz one Plan for the Ma ricopa County Area. b. Periodic Emissions Inv entory, nolater

than every

three year

s until attai nment of the standard This requirement

was addressed earlier in this section under requirements for Section 172, Nonattainment

Plan Provisions. Appendix E of the Fin al Seri ous Area Oz one State Implementation Plan for Mari copa County contains the 1996 periodic emission inventory completed bythe Maricop a County Env ironmental Ser vices D epartment for three ozone precursors: volatil e organic compounds, carbon monox ide, and nitrog en oxides. In addition, the M aricop a County Env ironmental Ser vices D epartment has compl eted a periodic emis sion s inve ntor y for 1 999 , the late st vers ion o f whic h wa s submitted to EPA in August, 20 02. The 1999 Periodi c Ozone Emis sions Inventoryis included in Appendix A, Exhibit

1 of the One-Hour

Ozone Redes ignation R equest and Mai ntenance Plan.

c. Submission of the 15 Percent Rate ofProgress Plan for volatile organic compounds The State is req uired to submit a rev ision to the app licable impl ementation plan toprovide for volatil e organic compound emission redu ctions of 15 percent from baseline emissions and shal l provi de for

such specific

annual reducti ons in emissi ons of VOCs and NO x as necessary to attain the standard. In orde r to meet the Moderate are a req uirements, the MAG 1993 Ozone Plan for the Maricop a County

Area was submitted to EPA by November 15, 1993. An Addendum to this Plan which contained additional con trol measures w as2-26

submitted to EPA in Mar ch 1994. In accor

dance w ith Section 1 82(f), a NOx exemption petition was approved b y EPA for the Maricopa County N onattainment Area on April 19, 1995. The MA G 1993 O zone P lan and Addendu m, as well as an attainment demonstr ation was found complete by EPA on M ay 12, 1995. Eff ecti ve June 26, 1998, the E nvironmental Protection Agen cy promulg ated a Federal Implementation Plan whi ch demonstrated that the 15 Percent Rate of Progress(ROP) g oal would be met by

April 1, 1999(see 63 FR 28898, May 27, 1998). On Jul y 6, 1999, EPA finalized a rule to make minor changes to the FIP which did not alter the conclusion tha t the 15 Percent ROP requirement ha d been met (see 64 FR 36243 ). d. Reason ably Availab le Contro l Techn ology In accordance w ith Section 182 (a)(2)(A), t he state is r equired to s ubmit a revi sion that includes provisi ons to correc t requir ements in (or add req uirements to) the plan concer ning reasonably availabl e control tec hnology as required under Section 172(b) in effect bef ore the 1990 amendments to the Cle an Air Act. The source categ ories subjec t to the Reasonably Availabl e Control T echnology correctio ns may be found in Chapter 2 of the Final Serious A rea Ozone State Implemen tation Plan for Maricopa Coun ty. The source cate gorie s are summ arize d bel ow.

• Architectur

al Coatings. EPA approv ed Maricopa C ounty Rule 335 as a SIP r evi sion effective on Mar

ch 6, 1992.

• Surface Coating Ope rations. EPA approved Maricopa County Rule 336 a s a SIP revisi on effective on Nov ember 19, 1999.

• Solvent

Cleaning. EPA finaliz ed a limited appr oval and li mited disapprov al of revis ions to Maricopa County Rul e 331 as a SIP re vision effecti ve on May 16, 2003.

• Petrole um Solvent Dry Cleaning. EPA approved revisions to Maricopa County Ru l e 333 as a SIP rev ision effectiv e on March 11, 1998.

• Cutback and Emulsified Asphalt. EPA approved M aricopa County Rule 340 as a S IP revisi on effective on Mar ch 4, 1996.

• Storage of Organic Li quids at Bul k Plants. EPA approved Maricopa C ounty Rule 350 as a SIP rev ision effectiv e on October 5, 1 995.

• Loading Organic Liquids. EPA approved M aricopa County Rule 351 as a S IP revis ion effective October

5, 1995.

• Tran sfe r

o f Gasoline into S tationary Dispensing Tanks. EPA approv ed Maricopa County Rul e 353 as a SIP re vision effecti ve March 4, 1996.

• Gasoline Deliver

y Vessel Testing and Use. EPA ap proved Maricopa C ounty Rule 352 as a SIP rev ision effectiv e October 5, 1995.

• Graphic Arts. EPA app roved rev isions toMaricopa County Rule 337 as a SIP rev ision effective Marc h 11, 1998. Under Section 182(b)(2)(A), the state is t o imp lement reasonably availabl e control techno logyfor VOC sources in the area covered by a control tec hniques guideline documentissued by

EPA between t he Clean Air Act Amendment enactment date and the date of a ttainment. The source categories subject to this requireme nt may be found in2-27

Chapter 2 of the Final Seri ous Area Oz one State Implementati on Plan for Mari copa Coun ty. A negative declaration was submitted in March 2000 for two so urce categories which are not present

in the Mari copa County no nattai nment area, Ship Bui lding and Repair and Distil lation Operati ons Process. A copy of this declaration may be fou nd in Appendix B of the Serious A rea Ozone P lan. The source categories meet ing this requi reme nt ar e sum mari zed be low.

• Coating Wood Furniture and Fixt ures. EPA appr oved Mari copa County Rul e 342 as a SIP revi sion effective M arch 11, 1998.

• Aerospace Manufacturing and Rewor k Operations. EPA approv ed Maricopa C ounty Rule 348 as a SI P revisi on effective November 19, 1999. Under Section 182(b)(2)( B), t he state is to implement reasonabl y avai lable control techno logyfor VOC sources covered by any control techniques guideline before the Clean Air Act Amendment enactment date. There are no other source categories subject to this provisi on, other t han the source categories subject to the correctio n requirements in Section 182(A) of the Cl ean Air Act. A negative declaration was submitted by the state in April 1993 for these source cat egories. In addition, Section 182(b)(2)(C) requires the state to impleme nt reasonably available cont rol technology

for all other major stationar y sources

of VOCs that are located in t h e area. Any stati onary sour ce or grou p of sources that e mits or has th e potential to emit at least 50 tons of vola tile orga nic compounds meets the Clean Air Act definition of a “major source” and “major stationary s ou rce ”. The source categoriesmeeting this requirement are s umm arize d bel ow.

• Rubber

Sports B all Manuf acturin g. EPA approv ed revisi ons to Maricopa County Rule 334 as a SIP rev ision effectiv e on March 11, 1998.

• Metal Casti ng. EPA appro ved Maric opa Coun ty Rule 341 a s a SI P revis ion e ff ecti ve March 13, 1996.

• Commercial Bread Bakeri es. EPA approved Maric opa Coun ty Rule 343 e ff ecti ve May 16, 1997.

• Semiconductor

Manufacturing . EPA approved Maricopa C ounty Rul e 33 8 ef fec tive March 11, 1998.

• Vegetable Oil Extraction Process es. EPA approv ed Maricopa C ounty Rule 339 effective Marc h 11, 1998.

• Coating Wood Millwork. EPA approved M aric opa Coun ty Rule 346 e ff ecti ve March 11, 1998.

• Ferrous Sand Casting . EPA approved MaricopaCounty Rule 347 effective Aug ust 11, 2000.

• Vitamin Manufacturing . EPA approved MaricopaCounty Ru le 349 effective Au gust 7, 2001. To fulfill the CAA sections § 182(a)(2)(A) and (b)(2), Maricopa County propose s t o complete three outstand ing proce sses to implement RACT. The proces ses include completing rul e revisi ons to Rule 331 to address the M ay 16, 2003 li mited approval and limited disapprov al, development of new Rul e 358, and issuance of a Title V permi t to2-28

impose source-spec ific RACT for anoth er major sour ce. Marico pa County's proposed commitment

to complete these act ions as ex peditiously as practicable is in Ap pendix B, Exhibit1 of this One-H our Ozone Redesignation Request and M aintenance Plan. The proposed implemen tation schedule from that commitment f ollows: Implementation Schedul e: Revise Rule 331 Solve nt Clean ing: November-D ecember 2003 Conduct workshops and stakeholde r meetings. February- March 2004 Publish Not ice of P roposed Ru lemaking and conduct Oral Proc eeding. April-Ma y

2004 Boar d con sid erat ion and a cti on on Dra ftNotice of Final Rulema king. May-June 2004 Rule beco mes e ff ecti ve 30 days after Board action as the revis ions are admini strativ e. July 2004 Submit rule to EPA. New Rul e 358 Polyst

yrene Foam Op erations November-D ecember 2003 Publi sh Notice of Propos ed Rulemaking and c onduc t Oral Proc eeding. February-March 2004* Board consider ation and action on Draft Notice of Final Rulema king. March-Apr il 2004 Rule become s effective 30 day s after Board act ion as the revisi ons are administrative. Propose d implementation schedule req uires insta llation of controls w ithin 18 months of r ule adoption. April-June 2004 Submit rule to EPA. *Add two—thre e additional months if public commentsrequire a substantive revisi on to the proposed rule Source Specific RACT by Permit October-December 2003 Notification of availabil ity of draft Titl e V permi t published. Comment period closes December 5, 2003. 1. No public comment or exte nsion reques t:2-29

December 2003 Submit to EPA for 45- day rev iew and comment. February 2003 Address comments a nd finalize pe rmit. February- March 2004 Publish notice o f SIP re vision and hold pu blic hea ring. April 2004 Submit source-specific RACT provisions from permit to EPA. February- May 2004 Complete design and award contracts for emissi o n control sy

stem (ECS) January 2005 Complete installation of ECS March 2005 Complete perform ance testing on new ECS 2. Extension r

equest w ithout public comment adds 30 days to schedule i n 1.

3. Public comm ent wi thou t a req uest for p ubli c hea ring a dds 1 5 add itio nal d ays to 1 and 2. 4. Public Hearing request w ill add 90 addi tional days to sc hedule for 1 and 2. EPA may also find i t necessary to request an extension of their comment peri od. 5. EPA

objections w ill add another 90 days for D epartment respons e plus another 45 day EPA r

eview period to sched ule in 1. In the Final Serious Are a Ozo ne Plan another maj or source, a fiberglass boat manufacture r, was included in the County' s commitment to impose source-specific RACT standards in a Title V pe rmit. Se a Ray Boats , Inc. closed in December 2001 prior to issuance of its Title V permit. There are no other major s ources in thi s category present in Maricopa County that would trigger the requirement to impose RAC T. As requi red by the General Preambl e, a negative declaration for this source category

will be submitted to EPA with this plan (see Appendix B, Exhibit 2 of this One-H our Ozone Redesignation Request and Maintenance Plan ).

e. Gasoline Vapor Recovery Under Secti on 182 (b)(3), the State was required to submit a SIP revision to require all owners or operators of ga soline dispens ing systems to instal l and operate a s ystem for gasolin e v apor recovery of emissi ons from the fueling of motor vehic les applyi ng to facilitieswhich sell more than 10,000 gallons of g asoline per mont h (50,000 gal lons per month in the c ase of an indepen dent small business markete r of gasoline as defined in Section 324). On May 27, 1994, ADEQ s ubmitted to EPA Stag e II vapor recovery rules thatwere adopted by the Ari zona Depart ment of W eights and M easures on Aug ust 27, 1993. Full appr

oval for the progr

am was gr

anted by EPA effective January 3, 1995 (see2-30

59 FR54521, November 1, 1994). Subsequent leg islative action (HB 2001, 1997) req uired the Arizona Dep artmen t of Weights and Mea suresto adop t rul es to e nhance the pr ogram

. Since then, a quality

assurance and q uality control program has been implemented by the Department. f. Motor Vehicl e Emission Con trol Inspecti on and Maintenance Program The State Ve hicle Inspect ion MaintenanceProgram established in 1976is desig ned to promote the clean op eration of motor vehicles by controlling vehicle exhaust emissions. The program is

operated by

the Ariz ona Department of Env ironmental Qual ity and contains the provis ions listed in Section 182(a)(2)(B) of the Clean Air Act f or a Vehicle Inspec tion and Mai ntenance (I/M ) Pro gram. The Vehicle Emissions Inspection Maintena nce Program w as significantly enhanced and strengthened by the Arizona Legislature in 1993 (H.B. 2001) . The Legisl ature establi shed a biennial, tr

ansient loaded ( I/M 240) emis sions test for gasoline powered vehicles model year 1981 or newer wit h a gr oss vehic le weig ht of up to 8,500 pounds, beginning January 1, 1995. H.B. 2001 also increased the repair threshold limits for g asoline powered vehic les in order to be eligible for a waiver through the Vehicle Emiss ions I nspect ion Ma intena nce Pr ogram

. The repair li mits were in creased in the following manner: 1967-1974 from $ 50 to $100; 1975-1980 from $200 to $300; and 1981 and newer from $3 00 to $45 0. The bill also increased the repair t hres ho ld limits fr om $300 to $500 for dies el powered vehicleswith tandem axles or a gross vehicle weight in excess of 26,000 pounds. The Arizona Legisla ture passed S.B. 1002 i n 1996 which limits the i ssuance of a wai ver f or failure to compl y wi th the emission testing r equirements to one-time only beginni n g January 1, 1997 (A.R.S . 49-542 D.). This measure i s documented in the Re vised 1999 MAG Serious Area Carbon Monox ide Plan for the Maricopa C ounty Nonattai nment Area as “One-Time Waiver from Vehic le EmissionsTest,” on page 8-10; and in the Technical Support Document, beginning on page V-14. The Arizona L egislatur e passed H.B. 223 7 in 1997 which c ontains an appropriation of $120,000 from the State Genera l Fund to the Arizona Depar tment of Environmental Quality to develop and implement an alternativ e tes t protocol to reduce the false fail ure rates associated with the more stringent pass-fa il standards for theVehicle Emis sions Testing Program (Section 19 of H.B. 2237 ). This measure i s documented in the Revised S erious Area Carbon Monox ide Plan as “Phased-In Emi ssion Test Cutp oints,” beg inning on page 8-5; and in the Tec hnical Support Document, begi nning on pag e V-8. 2. Meet requi rements for Seri ous nonattainment ar eas g. Enhanced Monitor ing Followi ng the promulgat ion of EPA rules relating to enhanced monitoring for ozone, ox ides of nitrogen, and volatile or ganic compounds , Section 182(c )(1) req uires the State to2-31

impr ove monitoring for ambient concentr ations of ozone, oxides of nitrogen, and volatile organiccompounds and to impr ove monitori ng of emissionsof oxides of nitr ogen and volatile or ganic compou nds. To meet the req uirements in Se ction 182, EPA r evised 40 CFRPart 58 w hich callsfor the establis hment of a Photochemical Assessment Moni toring Stations (PAM S) network. The Final Ser ious Area Ozone State Implementation Plan for Maricopa County in dicates that the ADEQ is phasing in t he PAMS network consistent with 40 CFR Part 58 require ments and o ther releva nt EPA guidance. The PAMS ne twork mea sure s ozon e, NO x, and variou s VOCs , and surf ace a nd up per a ir me teor ology. h. Attain me nt Demonstr ation and Reasonabl e Further Pr ogress De monstration Under Section 182(c)(2), the State is to submit a SIP revi sion demonstrati ng that the Pl an will provide for

attainment of the one-h our ozone NAAQS by the applicabl e attainment date. The attainment de monst ratio n mu st be based on photoc hemical gr id modeling o r any other analy

tical method as determined by EPA. The seriou s area attainment date for the Maricopa C ounty area w as November 15, 1999. In addition, a SIPrevisi on is requi red from the State de monstratin g reasonable further progr ess that would result i n emission reductionsof ozone precur sors of at least

thr ee pe rcent of baselineemissions betw een 1996 and 1999 (9 Per

cent Rate of Prog ress Plan). In the D etermin ation of Attainm ent of the 1-Hour Ozone Stan dard for the Phoen ix Metropolitan Area, effecti v e June 29, 2001, EPA indicated that b ecause the area has monitored attainment of the standard based on existing controls, contingency measures and demonstrations t o sh ow attainment would not be necessary (see 66 FR 29230 May 30, 2001). EPA als o indicated that further emis sion reducti ons to meet the RF P/ROP provisi ons of sections 172(c) (2) or 182( c)(2)(B) for serious ar

eas have alr

eady been fulfilled. In the May 10, 1995 EPA memoran dum regarding “Reasonable Further Progress, Attainment

Demonstration, and Related Req uiremen ts for Ozone Nonattai nment Areas Mee ting the Ozone Nat ional Ambient Ai r Quality Standards”, E PA believes that the requirem ents relating to the attainment de monstration and reason able further progress demonstration ar

e not requir

ed as long asthe area conti nues to meet the stan dard. i. Enhanced Vehicle Inspection and M aintenance Prog ram An enhanced vehi cle emissions inspection and maintenance program is operated in Ar ea Aof Maricopa and P inal Counties by the Ari zona Depart ment o f E nviro nme ntal Qual ity. The pro gram contain s the provi sions in Sect ion 182(c)( 3) of the Clean Ai r Act for an Enhanced Vehicle Inspection and Mainte nance Program. The State’s complete inspec tion and maintenance program is documented in the F inal Arizona State Implementation Plan Revisi on, Basic

and Enh anced V ehicl e Emi ssions Inspection/Maintenan ce Programs, Volumes 1 and 2, Air Qual ity Divis ion, Arizon a Dep artm ent o f En viron men tal Q uali ty, June 2001. EPA

proposed approval of the Ariz ona I/M prog ram in August 2002 and signed the final approv al notice on Oc tober 31, 2002. The final approval notice was published in the Federal R egister on January 22, 2003.2-32

j. Clean -Fuel Vehic le Pro grams Under Section 182( c)(4) , the stat e, exc ept t o the exten t tha t sub stit ute p rovisi ons h ave been approved by

EPA, wil l submit a SIP revisi on for each area described under part C of Title II to include such measures necess ary to ensure the eff ectiveness of the applicable provisi ons of the c lean-fuel v ehicl e prog ram, including all measures necessary to make the us e o f clean alternati ve fuels in c lean fuel vehi cles (as define d in part C of Title II) economic from the standpoint of vehicle ow ners. ADEQ s ubmitted a SIP rev ision to EPA on December 7, 1998 requesting that a portion of the emis sions reducti ons attributable to the Cleaner Bur ning Gasoli ne program be approved as a substitute pr

ovision for

the CleanFuel VehicleProgram r equirements. The SIP revi sion is aw aiting appr

oval from EPA. j. Transportation C ontrol Section 182(c)(5) re quire s the state to s ubmit a demonstrati on as to whet her current aggreg ate vehicle mileage, ag gregate vehicle emissi ons, congesti on levels, and other relevant parameters ar

e consistent w ith those used fo r the area’sattainment demonstration. Where such parameters exceed the level s projected i n the attainment dem onstration, the state w ill submit a SIP revi sion to incl ude transportati on contro l measures from Sect ion 1 08(f ) to re duce emis sion s leve ls con siste nt wi th the at tainment demonstration. EPA believes that the requirements relatin g to the attainment demonstration and reasonable furthe r progres s demonstration, including , transportati on control requirement

s, are not req uired as long as the area continues to meet the standar d. This EPA policy

is prov ided for in the M ay 10, 19 95 EPA memorandum regar ding “Reasonable Further Progress, Attainment Demonst ration, and Rel ated Requir ements for Ozone Nonattainment

Areas Meeting the Ozone National Ambient Air Quality Standa rds”. l. New Source Review Provisi ons The new source review (NSR) pr

ovisionsrequired under the Clean Air Act Sect ion 182(c)(6), (7), and (8)

may be found in Chapter 2 of the Final Seri ous Area Oz one State Implementation Plan for Mari copa County. These provi sions describe the applicabi lity of permit requirements under the Cl ean Ai r A ct for increased emissions of volatile organic compounds resulting from any physical change in, or change in the method of operation of a stationary

source. Ar izona Rev ised Statutes Se ction 49-402(A ) and (B)describes t he provisi ons for new source review and preventi on of significant deteriorati on (PSD) r

equired under the Clean Air Act for the state. A state implementati on plan revi sion for porti ons of the major

source permi tting and modifications, and minor sources was submit

ted to EPA on August 15, 1994. Maricopa County al so submitted Rul es 100, 200, 210, 220, 240, and Appen dixB as a revi sion to the NSR /PSD progr

am. These revi sions wer e found to be comple te by EPA o n Septe mber 1, 1994. E PA appr oval may be forthc oming. Conformity Requirements In addition to the above requiremen ts, the State Impleme ntation Plan must demonstrate that its prov isions are consistent with Sec

tion 176(c)(4) conformity requirements. These provisi ons ensure that federally fun ded or approved projects and act ions an d other regionallysignificant

projects c onform to the State Impl ementation Plan pr ior to the pr ojects or actions bei ng implemented.2-33

State rules for tr

ansportation co nformity were adopted on Apr il 12, 1 995, by the Ar izona Department

of E nviro nme ntal Qual ity, in response to requirements in Section 17 6(c)(4)(C) of the Clean Air Act as amended in 19 90. These rules b ecame effec tive upon their certification by the Arizon a Attorn ey Genera l on June 15, 199 5 and, a s requ ired by the federal conformity rule, weresubmitted to EPA as a revi sion to the State trans portation conformity SIP

. To date, a State tr

ansportation co nformity SIP has not received approval by EPA. Sec tion 51.390(b) of the federa l conform i ty rule s tates: “Foll owing E PA approval of the State conformity

provisi ons (or a por

tion thereof) in a r

evision to the applicabl e implementation plan, conformity determinations w ould be governed by the appro ved (or approved por

tion of the) State criteria and procedur es.” The federal transportation confo rmity rule therefore still g overns, asa transportat ion conformity SIP has not yet been approve d for this area. The State rule specifies that Metro politan Planning Organizations (i.e., MAG, for this region)must develop specific conformit y guidance and consultati on procedures an d processes. MAG has developed and adopted two conformity g uidance documents to meet State requirement

s. MAG developed the “Trans portation Conformi ty Guidance an d Procedures” document, whi ch was adopted initiall y on September 27, 1995 by the MAG Regiona l Coun cil. The document was rev ised by the MAG Regi onal Council on March 27, 1996. This guidance document addresses both the determination of “regional significance” status for individual transportation p rojects, and the pro cess by which regionall y sign ificant projec ts may be appr

oved. MAG also developed the “Conform ity Consult a tion Process es” document, w hich was adopt e d on February

28, 1996 by theMAG Regi onal Council . This guida nce document details the public and interagency consultation processes tobe used in the dev elopment of regional transportati on plans, prog rams, and projects w ithin the Maricopa County nonattainment

area. Adherence to the above rules, guidan ce, procedures, a nd processes ensure that the SIP provisions are consisten t with conformity requirements.3-1 CHA PTER THRE E MAI NT EN ANC E P LAN Section 107(d)(3)(E) of the Clean Air Act stipulates tha t for a nonattain men t area to be redesignated to at tain men t, En viron men tal P rote ctio n Age ncy (EP A) mu st fu lly app rove a maintenance plan which meets the requir

ements of the Clean Ai r Act Secti on 175A. The maintenance pla n is a Sta te Implementation Pl an (SIP) rev ision and must pr ovide for maintenance of the relevant National Ambie nt Air Quality Standards (NA AQS) in the area for at least ten y

ears after redes ignation by EPA. In determining the amount of lead time to allow , EPA indicated that 18 months, as granted in section 107(d) (3)(D) of the Clean Air Act, shoul d be assum ed for EPA to approve a redesignati on request. Due to uncertai nties regar ding the time that the area wil l be redesignated to attainment, the year 2015 w as modeled to assur

e thatthe one-hour

ozone NAAQS is maintained at least ten years past an o ff icial noti ce of redesigna tion to attainment by E PA. The EPA has establi shed the core el ements listed bel ow as neces sary for appr oval of maintenance plan s. 1. Descripti on of the control meas ures for the mainte nance period 2. Emission inventories for base and future years 3. Maintenance demonst ration 4. Mobile sour

ce emissions budget 5. Approved monitoring network 6. Verification of co ntinued attainment 7. Contingency

plan 8. Subsequent mainten ance plan rev isions MAINTENANCE PLAN CONTROL MEASURES Gene rally, the overall approach taken i n preparing the One-Hour Ozone Maintenance Pl an is to demonstrate maintenance of the one-hour oz one standard in 2 015 with thecommitted measures in the Rev ised MAG 1999 Se rious Area C arbon Monoxi de Plan and Carb on Monoxide Redesignati on Request and Maintenance Pl an, since most of those measures also reduce ozone . Therefore, the Ozone Maintenance Pl an relies heav ily up on the Revised MAG Serious Area Carbon Monoxide Plan and its s upporting documents, including the commitments to i mplementcontrol measur es. The OzoneMaintenance Pl an also relies upon the Final Serious Area Ozone State Imple mentation P lan for Maricopa County and themodified Ariz ona Cleaner Bur ning Gasoli ne Program. Descripti ons of the committed control measures in the mainte nance plan are organized in three groups bel ow. The first group of mea sures includes those for which numeric credit is assumed in the maintenance demonst ration. The combi ned emission reduction impact3-2

of t his class of measures, descr ibed as maintenancemeasures, is reflected in the 2015 modeling inventory

described in Section VI-3 of th e Technical Support Docum ent (TSD). The control measur

es that are incl uded in this anal ysis as maintenance measuresinclude Summer Fuel Reformulation: Calif ornia Phase 2 and Federal Pha se II Reformulated Gasoline with 7 psi f rom May 1 th rough September 30, Phased- In Emission Test Cutpoints, One-ti me Waiver fro m Vehic le Emi ssion s Te st, Coordinate Traffic Signal Sys tems, Devel op Intelligen tTransportation Systems, Toug her Enforcement of Vehic le Regis tr ation and Emission Test Complianc e, an d Maricopa C ounty Rule 348: Aerospace M anufacturing and Rework Operations. The mai ntenance measures ar e listed in Table 3-1. The s econd group of measur es includes t he committed measures that are part of the contingency

plan descri bed in Section V I-5 of TSD. For these measures, nocredit wa s taken in the maintenance de monstration. The imp act of these measures is not reflected in the 201 5 model ing i nventory in Sec tion V I-3 of TS D. Th e control m easures that are included in this anal ysis as contingency mea sures i nclude Expans ion of Area A Boundaries, Gross Poll uter Option for I /M Program W aivers, and Increased W aiver Repair Limit Options. Des criptionsof the contingency measures are sum marized in Section VI of TSD, with more detailed des criptions p rovided i n Appendix VI of TSD. The third group of measures includes a dditional measure s fo r which commitments were received, but numeric emis sion reducti on cred it was not taken. The impa cts of these measures are not readi ly quant ifiable. How ever, thesemeasures repr esent ad dition al legally-enforceable commitments to reduce emissions and improve airquality in the reg ion. Asummary of the committ ed maintenance an d co ntinge ncy measures is provided in Table 3-1 . Th e general appr oaches used to model the emission r eductions from the individual measures are s imilar to th ose used in the C arbon Monoxi de Maintenance Plan, althou gh exceptions

are necessar

y due to seas onal differenc e s. Figures 3-1 and 3-2 illustrates the emission r eduction impact of

the indiv idual maintenance measures in 2015 for NOx and VO C, res pecti vely. Table 3-2 quant ifies the emissi on reductions fr om the committ ed maintenance measures in metric tons per day. The base total emi ssions i n Table 3-2 were est imated by ass uming that none of themaintenance measures , including the Federal Offroad Vehi cle and Engi ne Standards, ar e implemented in 2015. The comparison of the base emissi ons with t h e maintenan ce measure package in 2015 is exhibited i n Table IV-3 of the Techni cal Support D ocument. Measures Used for Numeric Credit The seven maintenance mea sures a ssumed in modeling maintenance of the one-hou r ozone standard throug h 2015 are descr ibed in Chapter Two. Fig ures 3-1 and 3- 2 identifies the emission redu c tion cr edit for each of th e individual maintenance me asures. These measures are des cribed in detail in Secti on VI-2-1 of the Techni cal Support D ocument.3-3 TABLE 3-1 COMMITTE D MA INTENA NCE A ND CONTI NGENCY M EASU RES IN TH E O NE -H OU R O ZO NE MAI NT EN ANC E P LAN

MaintenanceMeasures Used for Nume ric

Credit Conting ency Measures

1. Summer Fuel Reform ulation: California Phase 2 and Federal Ph ase II Reformulated Gaso lin e w ith 7 ps i fro m Ma y 1 thro ugh September 30 1. Expansi on of Area A Bo undaries

2. Phase d-In Em issio n Test C utpoi nts 2. Gross Emitter Waiver Prov ision 3. One-time Waiver from Vehicle Emissions Test 3. Increased W aiver Repair Limit

4. Coordi nate Tra ffic Sign al Sy stems 5. Deve lop In telli gent Tran sporta tion S ystems 6. Tougher Enf orcement of Vehicle Registration an d emission Test Compliance 7. Maricop a County R ule 348: Ae rospace Manufacturing an d Rework Operati ons3-43-53-6 TABLE 3-2 SUMMA RY OF 2015 E MISSION RED UCTIONS IN NONA TTA INMENT AREA

FROM COMMITTE D MA INTENA NCE MEA SURES USED FOR NUME RIC CRED IT a

NOx VOC Base Total Emissions (metr ic tons/d ay) 232.7 b 413.9 b

Maintenance Measu re Emission Reductions (metric ton s/d ay) Percent

Reduction in Emissions Emission

Reductions (metric ton s/d ay) Percent

Reduction in Emissions

Summer Fuel Reformulation: California P hase 2 and Federal Pha se II Reformulated Gasol ine wi th 7 psi from May 1 th rough September 30 4.1 1.8% 1.9 0.6%

Phase d-In Em issio n Test C utpoi nts < 0.1 (increase) < 0.1%

(increase) 0.1 <0.1%

One-time W aiver from Vehicle Emissions Test 0.1 <0.1% 0.1 <0.1%

Coordi nate Traffic Sign al Sy stems 0.1 <0.1% 0.3 0.1% Develop Intelligent Transp ortation Syste ms < 0.1 (increase) < 0.1

(increase) 0.1 <0.1%
Tougher Enf orcement of Vehicle Registration an d Emission Test Compliance 0.2 0.1% 0.2 0.1%

MaricopaCounty R ule 348: Ae rospace Manufacturing an d Rework Operati ons N/A N/A 0.01 <0.1%

a -Individu al impact of measu res is not ad ditive. b -The total an thropo genic N Ox and VOC em issio ns are226.5 and 32 8.1 metr ic ton s/day , respe ctiv ely.3-7

Measures Inclu ded in th e Conting ency Plan Expansion of Area A Boundari es, Gross Pol lute r Optio n for I/M Prog ram Waivers, and Increased Waiver Repair Limit Options are contingency measures in bot h the Revi sed Serious Area Carbon M onoxide Plan and the Carbon Monoxide Maintenan ce Plan. These measures are des cribed in C hapter VI of the Oz one Maintenance Pl an TSD. These three conting ency measures have already been implemented in the nonattainment ar ea. Early i mplementation of conting ency measures is allow ed by EPA and hel ps to ensure that the standar d will be maint ained thro ugh 2015. The Cont ingency Provisi ons later in this Cha pter identify procedures th at w ill be foll owed to cons ider and implement additional cont ingency measures, as needed. The contingency

measures are des cribed in Se ction VI-2-2 of the Te chnical Support Document. Measures Which Improve Ai r Quality , But Were N ot Used f or Numeric Credit The third gr

oup represents measures that were not quantified for emission r eduction credi t, butare committed measures in both the atta inment and mainte nance plans. These nonquantified measures are described in detail in Sect ion VI-2-3 of the Tech nical Support Document. EMISSION IN VENTORIES This section sum marizes th e b ase year 1998and 1999, the interim year 2006, and the maintenance yea r 20 15 ozone e miss ion inv ento rie s fo r use in the Urban Air shed Model (UAM) simulations. The emissions i nventoriesinclude onroad mobile, nonroad mobi le, point, area, and biogenic sources. The 1998 inventor

y was developed for J uly 16-17 a nd the 1999 inventor y wasdeveloped for August 23-2 4. Both base year inventories reflected cont rol measures in place at that time. The future year

emission inventories inc lude projected emission redu ctions resul ting from committed contro l measures that were impl emented after 1998 and 1999. Section s III-1 and VI-3 of the Te chnical Support Document descr ibe the tech nical detail s of the emission inventories for 1998, 1999, 2006 and 2015. Demographic and Transportation Data Emissions for source ty pes other than onr oad mobile and biog enics wer e d eve loped for a base year and then projected to 2 006 and 2015 through t he application of appropriate growth factors. The gr ow th fa ctors were based on the 2015population proj ections approved by the MAG Regional Council in June 1997 and deve loped from the 19953-8

Special Census. The 2015 empl oyment factors b y SIC were extrapolated from projectio ns prepared by the Arizon a Department of Economi c Security (DES) in August 1997. On road mobile sou rce emission s were i ncreased by eight and twelve percent for 2006 and 2015, respectively. These increases w ere applied r

egardless of hour of the day or location in the modeling domain , because of an ex pected increas e in population and employment projectionsfor the County. The DES is in the process of developing new popula t ion projectionsfor the State and counties based on the 2000 Censu s. These projections were notavailabl e from DES when this plan was completed. However, prelimi nary data i ndicate thatthe new vehicle travel estimates w ill be about ei ght and twelve per cent higher, resp ecti vely, than previ ous 2006 and 2015 projectionsfor the ozone nonattai nment area. Summary

of the Em ission Inv

entories The 1998 and 1999 base cases, 2006 interim year , and 2015 maintenance year emiss ion inventori es for NOx and VOC are summar ized in Tabl es 3-3 throug h 3-6. In the 1998 and 1999 base cas es, the onroad mobi le emissions contribute 28 to 30 percent of VOC emissio ns an d 51 to 52 percent ofNOx emissions and represent the largest emissions source among all categorie s for both NOx and VOC speci es. With the implementation of the committed maintenan ce measures and s tricter F ederal controls on vehiclesand fuels, onroad mobi le NOx emi ssions decrease by 19.3 percent

between 1999 and 2006, and 58.7 per cent betw een 1999 and 2015. Onr oad mobile VOC emi ssions decrease by 32.7 percent between 1999 and 2006, and 54.4 percent between 1999 and 2015. Due to anticipated growt h in regi onal population, area sourcesbecome the largest source categoryfor NOx

and VOC emissi ons in 2015. Ar ea source NOx

emissions i ncrease by 25. 8 perc ent between 1999 and 2006, and 56.7 percent between 1999 and 2015. Area source VOC emissio ns increase b y 22. 8 perc ent between 1999 and 2006, and 49.5 percent between 1999 and 2015. As a result of

expected in creases in power plant emissi ons, point sour ce NOx emi ssions increase significant ly from the bas e years to2006 and 2015. Point source NOx emis sion increase by 48.5 percent between 1999 and 2006, an d 59.4 percent betw een 1999 and 2015. Point source VOC emissions inc rease by 13. 7 percent between 1999 and 2006, and 32.0 percent between 1999 and 2015. With the implementation of the Federal Off-Road Vehicle and Engine Standar

ds, nonroad mobil e NOx emis sions decreas e by about 14 per cent between 1999 and 2006, and about four p ercent between 1999 and 2015 . Nonroad mobile VOC emissions decrease by about 23 pe rce nt between 1999 and 2006, and about 63 percent between 1999 and 2015.3-9 TABLE 3-3 SUMMARY

OF NOX EMISSIONS FOR JULY EPISODE IN 1998 BASE CA SE AND 2015 WITH COM MITTED M AIN TENA NCE MEA SURES Friday, Ju ly 17, 19 98 Friday, Ju ly 2015 2015-1998 Di fference Source Catego ry Metric Tons

per Day Metric Tons per Day Percent

Point 18.5 23.6 27.6 Area 33.2 53.6 61.4 Nonroad Mobile 57.4 55.8 -2.8 Onroad Mobile 126.2 51.6 -59.1 Biogenics 7.9 6.7 -15.2 Total 243.2 191.3 -21.33-10 TABLE 3-4 SUMMARY

OF VOC EMISSIONS FOR JULY EPISODE IN 1998 BASE CA SE AND 2015 WITH COM MITTED M AIN TENA NCE MEA SURES Friday, Ju ly 17, 19 98 Friday, Ju ly 2015 2015-1998 Di fference Source Catego ry Metric Tons

per Day Metric Tons per Day Percent

Point 15.6 21.0 34.6 Area 91.9 152.1 65.5 Nonroad Mobile 76.2 27.9 -63.4 Onroad Mobile 103.5 46.3 -55.3 Biogenics 85.5 93.7 9.6 Total 372.7 341.0 -8.53-11 TABLE 3-5 SUMMA RY OF NOX EMISSIONS F OR A UGUST EPISOD E IN 1999 BA SE CA SE, AN D 2006 A ND 2015 WITH COMMITTE D MA INTENA NCE MEA SURES Tuesday , August 24, 1999 Tuesday ,

August 2006 Tuesday ,

August 2015 2006-1999

Difference 2015-1999

Difference Source Categor y Metric Tons

per Day Metric Tons

per Day Metric Tons

per Day Percent Percent

Point 16.5 24.5 26.3 48.5 59.4 Area 43.0 54.1 67.4 25.8 56.7 Nonroad Mobile 59.3 50.9 57.2 -14.2 -3.5

Onroad Mobile 129.8 104.8 53.6 -19.3 -58.7 Biogenics 7.3 7.1 6.2 -2.7 -15.1 Total 255.9 241.4 210.7 -5.7 -17.73-12 TABLE 3-6 SUMMA RY OF VOCEMISSIONS F OR A UGUST EPISOD E IN 1999 BA SE CA SE, AN D 2006 A ND 2015 WITH COMMITTE D MA INTENA NCE MEA SURES Tuesday , August 24, 1999 Tuesday ,

August 2006 Tuesday ,

August 2015 2006-1999

Difference 2015-1999

Difference Source Categor y Metric Tons

per Day Metric Tons

per Day Metric Tons

per Day % %

Point 15.3 17.4 20.2 13.7 32.0 Area 82.6 101.4 123.5 22.8 49.5 Nonroad Mobile 78.5 61.0 28.7 -22.3 -63.4

Onroad Mobile 106.9 71.9 48.7 -32.7 -54.4 Biogenics 76.7 77.2 85.8 0.7 11.9 Total 360.0 328.9 306.9 -8.6 -14.83-13

Next to the forest vegetation ty pes, the “Res idential” l and u se ca tego ry has the highest emission f actors for biog enic VOC emis sions. On the other hand, the “Agricult ure” land use type is the biggest contributor to biogenic NOx emissions. Since it i s anticipated that residential area wil l continue to i ncrease and ag riculture area is ex pected to decli ne over time, biogenic V OC emissionsincrease by about 0.7 percent between 1999 and 2006, and a bout12 percent between 1999 an d 2015, while biogenic NOx emissions decr ease b y about3 percent between 1999 and 2006, and about 15 percent between 1999 and 2015. With implementation of th e committed maintenance measures, total NOx emis sions decrease by 5.7 percent between 1999 and 2006 and 17.7 percent between 1999 and 2015. Total VOC emis sions decreas e by 8.6 percent between 1999 and 2006 and 14 .8 percent between 1999 and 2015. MAINTENANCE DEMONSTRATION To demonstrate maintenance of the one-hour ozone NAAQS, the results from t he urban airshed modeling analyses should not show predic t ed one-hour max imum ozone concentrationsequival entto or gre ater than 0.125 ppm anywhere in the modeling domain for the episode modeled . The maintenance demonstration fo llows the deterministic procedure pres cribed in theEPA Guideline. UA M A nalys is The purpose of fut ure year simulations is to illustrate the eff ects of pro jected e mission changes on si mulated air q uality for given episodes. Comparison of th e base and future yea r emission total s, as show n in Tables 3-3 through 3-6, indicates tha t total NO x emissions for 2015 are 21 per cent and 18 percent

lower t han the 1998 and 1999 emissions estimates, respectively. Total VOC emissio ns for 2015 are 9 percent and 15 percent lower than the 1998 and 1999 emis sions estimates, respectively. The BaseCase Input Preparation, Quality Assurance and Diagnostic Analyses, and Perfo rmance Evaluation for the UAM runs a re documented in Se ctions III, VI, a nd V, respecti vely, of the Ozone Maintenance Pl an Technical Suppor t Document. UAM R esults The 1998, 1999, 2006, and 2015 maximum simul ated ozone one- hour concentrat ions and the grid cel ls wher

e the maximum ozone concentrati ons occurred are provided i n Table 3-7. As shown, the si mul ated one-hour ozone concentrati ons for both July and August episodes are b elow 125 ppb every

where in the modeling domai n for both 2006 and 2015. Therefore, the modeling results showed maintenance of the NAAQS for ozone in 2006 and 2015 for the Ma ricopa County nonattainment area. MOBILE SOURCE EMISSIONS BUDGETS FOR OZONE In accordance with the 1990 Clean Air Act Am endments, conf ormity requirements are intended to ensu re that t ranspo rtation activities do not re sult in ai r qu alit y degradation. Section 176 of the Amendments req uires that tr ansportation pl ans, progr ams, and projects conform to applicableair qual ity plansbefore the transpor ta tion action is ap prove d by a Metropolitan Planning Or ganizati on (MPO). The designated MPO for the Maricopa County area is MAG

.3-14 TABLE 3-7 THE 1998, 1999, 2006 AN D 2015 MA

XIMUM SIM ULA

TED ONE-H OUR OZONE CONCENTR

AT IONS FOR B OTH THE JU LY A ND A UGUST EPISOD ES

Modeled Episode Regional Maximum S imulated One-hour Conce ntration (ppb) Location July 199 8 119 (41,30) August 1999 125 (53,28) August 2006 124 (52,30) July 201 5 116 (45,35) August 2015 120 (51,30)3-15

Section 176(c) of CAAA providesthe framework for ensuring thatFederal actions conform to air qual ity plansunder Section 1 10. Conformity to an implementati on plan means that proposed activit ies must not (1) cause or contri bute to any new violati on of any standard in any area, (2) increase the frequency or severity of any existing violation of any standard in any area, or

(3) delay

timely attainment of any stan dard or any required interim emiss ion reductions or

other milesto nes in any a rea. EPA transpo rtation confo rmity regula tions es tablish criteria in volving c ompar ison of projected transportation plan emission s with the motor vehicle emissions assumed in applicable air qual ity plans . The regulat ions define th e term “mo tor vehic le emissions budget” as meaning “the portio n of the to tal allowable emissionsdefined in a rev ision of the applicable implementa tion plan (or in an implementa tio n p lan revi sion whi ch was endor sed by the Governor or his or her designee) for a certain date for the purpose o f mee ting r easonable furth er progress milestones or attainment or maintenance demonstrations, for any cri teria pollutant or its pre cursors, allocated by the applicable implementation pla n to highway and trans it vehic les.” The tran spor tati on co nfo rmit y budget for Volatile Or ganic Compounds

(VOCs) w

as established in the EPA appr oved and promul gated Rev ised Rate of P rogress Federal Implementation Plan (FIP), effective August 5, 199 9. This FIP established a mot or vehicle emissions budget for VOCs of 87.1 metric tons f or an avera ge summer (ozone) season day. T his budget will be used in MAG transportation conf ormity analyses until t h e Maintenance Plan is approved or the maintenance budget is found to be adequate. At that time, new trans portation conformi ty budgets for VOC and NOx

will be established for 2006 and 2015 for use in s ubsequent conformi ty analy ses. Onroad mobile source emissions for 2 006 and 2015 wer e developed by

MAG using the EPA-approve d MOBIL E6 model and Hig hway Per formance Monitori ng System (HPMS) reconcili ation meth odo logy. Documentation of the HPMS reconciliation methodology and an EPA approval letter are contained in Appendix III -iv of TSD. After the new motor vehicle emissions budget s are ap proved by EPA for conformity purposes, MAG will apply MOBILE6 and the HPMS reconciliation procedure to estimate onroad mob il e sourc e emissions for all confo rmity horizon years. The projections of the primary episode (a T uesday in August) in this Ma intenance Plan indicate that total NOx emissions in 2006 and 201 5 would be 241.4 and 210.7 metric tons per day, respectively, with the committed maintenance m easures. The onroad mobile source contribution for NOx is 104.8 metric to ns per day in 2006 a nd 53.6 metric tons per day in 2015 (from Table 3-5). Table 3- 6 shows that total VOC emi ssions in 2006 and 2015 would be 328.9 and 306.9 metr ic tons per d ay , respectively, w ith the committed maintenance measures, w hich inc ludes an onroad mobile source con tribution for VOCs of 71.9 metric tons per day in 2006 and 48.7 metr ic tons per day in 2015. The total onroad mobile source emiss ions of 53.6 metric ton s per day for NOx and 48. 7 metric tonsper day for VOCs repre sent the conformity budgets for ozone prec ursors in 2015. Since 2006 was also modeled, the Maintenance Plan establ ishes inter im conformity budgets of 104. 8 metric tons per day

for NOx and 71.9 metric ton s per day for VOCs in 2006. The 2006 and3-16

2015 emission inv

entories used to establish th e mobile source emissions budgets are documented in Appendix VI of the Technical Support Document. After EPA finds the mainten ance budgets to be adequate or ap proves theMaintena nce Plan, MAG wi ll apply

the provi sions of the EPA tr ansportation co nformity reg ulations (August 15, 1997), 40 CFR Part 93 Section 93.118( b). This Mai ntenance Plan establishes motor vehicle emis sions budget s for the maintenance year of 2015 and th e interim year of 2006. In accordance w ith 40 CFR Par t 93 Section 93.118 (b), MAG w ill use the new interim 2006 mobile sourceVOC and NOx emissionsbudgets for the conformity horizon years of 2006 through 2014 and the new 201 5 mobile source ozone precu rsor emissi ons budgets for conformi ty horizon years after 2014. MONITORING NETW ORK / VERIFICATION OF CONTINUED ATTAI NMENT Air quali ty monitori ng data in M aricopa County confirm that the at

tainment date of November

15, 1999, was

met, since no v iolation of the one- hour ozone standard has occurred at any monitor since 1996. As

a result, on May 30, 2001, EPA publish ed a final rulemaking notice determining that the Ph oenixmetropolitan serious ozone nonattainment area has attained theone-hour ozone air quality standard by the Clean Air Act deadline of November 15, 1999. Once the Maricopa County Nonattain ment Area has been red esignated to a ttainment stat us by EPA, the Arizona D epartment of Envi ronmental Quali ty (ADEQ ) and the Mar icop a County Environmental S ervi ces Department ( MCESD) w ill contin ue to operate an appropriate air quality monitoring network of National Air

Monitoring Stations (NAMS) a nd State and Local Air Monitoring Stations (SLAMS) monitors in accordance with 40 CFR Part 58 to verify

the continued attainment of the ozone standard. If measured mobile source parameters (e.g., vehicle miles traveled, congestion, fleet mix, etc.) change sig nifican tly over time, ADEQ and MCES D will perform the appropr iate studiesto determine whether additional and/or re-sited monitors are necessary. Annual review of the NAMS/SLAMS air quality surveillance system will be conducted in accord a nce with 4 0 CFR 58.20( d) to determine whether th e system cont inues to meet the moni tor ing o bjectives presented in Appendix D of 40 CFR Part 58. In order to track the progress of the Maintenance Plan, periodic emission inventories will also be prepared every threeyears i n accordance w ith Section 187( a)(5) of the Clean Air Act. Maricopa County will coordinate and compile th e inventory with input and assistance from the Arizona Depart ment of Environmental Quality, Arizona D epartment of Transportation, and Maricopa A ssociation of Governments, as described in the 1992 Air Quality Memoran dum of Agreeme nt. Chan ge s in the inventory will be review

ed and evaluated through the regional air quality planning process to determine if ad dit iona l measures should be considered. The final 1999 Period ic Ozone Emi ssions Inventory was prepared by the Maricopa County Environmental Service s Department i n August 2002 and is provi ded in t he Appendices. W orkhas begun on the 2002 periodic o zone emissi ons inventor y and the Maricopa County3-17

Environmental Service s Department ex pects to completethe inventor y by thesecond quarter of 2004. CONTINGENCY PROVISIONS Section 175A(d) of the Clean Air Act requires that mainte nance plans contain cont ingency provisions. EPA guidance on the requi red content of the co ntingency plan is prov ided in the September 4, 1992 EPA memorandum . This memo indicates th at the contingency plan is not requir

ed to contain full y adopted conti ngency meas ures. However, the plan should contain clearly

identified conti ngency meas ures to be adopted, a schedule and procedure f or adop tion and i mple men tati on, a nd a s peci fic t ime l imit for a ctio n by t he State. I n addition, specific indicators should be identified w hich wil l be used to deter mine when the contingency measures need to be implemented. The Maintenance Plan addresse s each of these requir

ements for an approvable conting ency plan. Consistent

with the August 1 3, 1 993 EPA guidance mem orandum titled, “Early Implementation of Contingency Measure s fo r Ozone and C arbon Monoxi de (CO) Nonattainment

Areas,” the contingency plan descri bed in th e mainte nance plan is comprised of committed control measures that ar e expe cte d to b e imp leme nted early. Earlyimplementation of contingency measures in a maintenance plan has been approved by EPA in the redesignation of the Sa ltLake City Carbon Monox ide Nonattainment Area to attainment (see page 321 6 of the January 21, 1999 Federal Register)

. In that action, EPA noted that both cont ingency measures in the Salt Lake Cit y Conting ency Plan had already been partially

implemented. The three conting ency measures in the Maintenance Plan are Area A Expansion , Gross Polluter O ption for I/M Program W aivers, and Increased W aiver Repair Limit Options. Emissions reduction cr edit for these cont ingency measures was not ta ken i n the maintenance demonstra tion. Adesc rip tion of t hese in dividual measures is pr ovided in S ection VI of the Techni cal Support Document. Earl y implementati on of these c o ntingency measures prov ides additional confidence that the o ne-hour ozon e standard will be maintained thro ugh 2015. The success of an ai r quality program is

measured by t he concentratio ns recorded at t he monitors. EPA regulati ons (see 40 CF R 50.9 and Appendix H to 40 CFR

50) define an exceedance of the one-hour oz one standard as a daily max imum hourly average o zone measurement

greater than 0 .12 ppm. Value s from 0.121 ppm to 0.124 p pm are rounded down to 0.12 ppm and thus, an exceeda nce is a daily maximum hourly average that is equal to or greater tha n 0.125 ppm. A viola tion of the NAAQS for one-hour ozone occurs w hen the expected number of exceedance s per calendar year at any

ozone monitor ing site, aver

aged over

the past three calendar year s, is gr eater than 1.0. In order to ensur

e that viol ations of the one-hour ozone standard do not occur in the future, ambientair qual ity monitor ing data w ill be examined to determine if additional contingency measures are needed

. Contingenc y prov isions w ill be triggered when the fourth highest3-18

dailymaximum hourly measurement over the past three years exceeds 0.120 ppm at any ozone monitor. If this occurs, addi tional measureswill be considered, which may include the strengtheni ng of exist ing conting ency measures . This trig ger is mor e stringent

than the standard and w ill ser

ve to pr eve nt th e occ urr

enceof f uture violatio ns. When activated, additional control measur es would be considered on t he following schedule: ( A) verificati on of the monitori ng data to be co mpleted three months after activat ion of the tr igger; (B) applicable measure to be conside red for adoption six months a fter dat e established in A above; and (C) resultant committed me asure to be implement ed within six to twelve months, depending upon the time needed to put the measure i n place. SUBSEQUENT MAINTENANCE PLAN REVISI ONS Itis requi red that a maintenan ce plan rev ision be submit ted to the EPA eig ht years after the original redesignat ion request /maintenance p lan i s approved. The purpose of this rev ision is to prov ide for maintenance of theozone NAAQS for an additional te n years following the first ten-year peri od. As the designate d Regional Air Quality Planning Agency f or the Maricop a County ar ea, the Maricopa Associati on of Governments int ends t o prepare a revis ed maintenance plan e ight y ears after redes ignation to attainment, as required b y the Clea n Air Act and the Enviro nmental Protecti on Agency.