ST41t)

UNITED

STATES ENVIRONMENTAL

PROTECTION

AGENCYREGIONIXPRO

75 Hawthorne

Street San Francisco,

CA 941O539O1OFFICEOFTHEREGIONALADMINISTRATOR March

29, 2011 Flonorable

Janice Brewer State

of Arizona 1700

West Washington Phoenix,

AZ 85007 Dear Governor

Brewer: I am writing

to provide

you

with guidance

for designating

areas

in Arizona

under

the recently

revised

primary

National

Ambient

Air Quality Standard (NAAQS)

for Sulfur Dioxide (S02).

We

are requesting

your recommendations

for designating

areas within

your

State

by June 3,2011.

On June

3, 2010,

the U.S. Environmental

Protection

Agency

(EPA) revised

the healthbased NAAQS

for

SO 2

by establishing

a new 1-hour standard

at

a level

of

75 parts

per billion (ppb).

This

new i-hour standard

will protect

public

health

by reducing

people’s

exposure

to high short-term

(5-minute

to 24-hour) concentrations

of SO 2 .

An area meets

the new standard when

the 3-year average

of the99th percentile

of 1-hour

daily maximum concentrations

does

not exceed

75 ppb. Section 107(d)(l)

of the Clean

Air

Act (CAA) describes

the process

EPA follows

for designating

areas

as meeting

or not meeting

a new

or revised NAAQS.

Within

one

year

of establishing

a new

or revised standard,

each governor

must recommend

a designation

of attainment, nonattainment

or unclassifiable,

with appropriate

boundaries,

for areas within

their jurisdiction.

Therefore,

we

ask

that your

State provide designation recommendations,

including appropriate

area boundaries,

for

all areas

by June

3, 2011,

with respect

to the 1-hour

SO 2 NAAQS.

The enclosed memorandum

provides

guidance

to state, territory

and local

air pollution control agencies

and tribes

on

the tirneline

and process

for designating

areas

under

the revised SO 2 standard.

We

plan

to aimounce

our intended designations

no later

than

120 days

prior

to promulgating

final designations.

Following

the announcement

of intended designations,

states, territories

and tribes

will have

the opportunity

to comment

on any modifications

EPA proposes to their recommendations.

EPA intends

to complete designations

no later

than

June

3, 2012.PrinredonRecycledPaperEstablishingareadesignationsisakeystepintheprocessofprovidingthehealthprotectionintendedbytheCAA.Shouldyouhaveanyquestionsregardingthismatter,pleasedonothesitatetocontactmeorhaveyourstaffcallDeborahJordan,AirDivisionDirector,at(415)947-8715.Sincerely,JaredBlumenfeldEnclosurecc:HenryDarwin,Director,ADEQEricMassey,Director,AirQualityDivision,ADEQNancyWrona,PolicyAdvisor,ADEQs€oSr4?fUNITEDSTATESENVIRONMENTALPROTECTIONAGENCYREGIONIXpRCø75HawthorneStreetSanFrancisco,CA94105-3901OFFICEOFTHEREGIONALADMINISTRATORMarch29,2011HonorableJerryBrownStateofCaliforniaStateCapitalBuilding,Suite#1173Sacramento,CA95814DearGovernorBrown:IamwritingtoprovideyouwithguidancefordesignatingareasinCaliforniaundertherecentlyrevisedprimaryNationalAmbientAirQualityStandard(NAAQS)forSulfurDioxide(S02).WearerequestingyourrecommendationsfordesignatingareaswithinyourStatebyJune3,2011.OnJune3,2010,theU.S.EnvironmentalProtectionAgency(EPA)revisedthehealthbasedNAAQSforSO2byestablishinganewI-hourstandardatalevelof75partsperbillion(ppb).Thisnew1-hourstandardwillprotectpublichealthbyreducingpeople’sexposuretohighshort-term(5-minuteto24-hour)concentrationsofSO2.Anareameetsthenewstandardwhenthe3-yearaverageofthe99percentileof1-hourdailymaximumconcentrationsdoesnotexceed75ppb.Section107(d)(1)oftheCleanAirAct(CAA)describestheprocessEPAfollowsfordesignatingareasasmeetingornotmeetinganeworrevisedNAAQS.Withinoneyearofestablishinganeworrevisedstandard,eachgovernormustrecommendadesignationofattainment,nonattainmentorunclassifiable,withappropriateboundaries,forareaswithintheirjurisdiction.Therefore,weaskthatyourStateprovidedesignationrecommendations,includingappropriateareaboundaries,forallareasbyJune3,2011,withrespecttothe1-hourSO2NAAQS.Theenclosedmemorandumprovidesguidancetostate,territoryandlocalairpollutioncontrolagenciesandtribesonthetimelineandprocessfordesignatingareasundertherevisedSO2standard.Weplantoannounceourintendeddesignationsnolaterthan120dayspriortopromulgatingfinaldesignations.Followingtheannouncementofintendeddesignations,stales,territoriesandtribeswillhavetheopportunitytocommentonanymodificationsEPAproposestotheirrecommendations.EPAintendstocompletedesignationsnolaterthanJune3,2012.PrintedonRecycledPaperEstablishingareadesignationsisakeystepintheprocessofprovidingthehealthprotectionintendedbytheCAA.Shouldyouhaveanyquestionsregardingthismatter,pleasedonothesitatetocontactmeorhaveyourstaffcallDeborahJordan,AirDivisionDirector,at(415)947-8715.Sincerely,JaredBlumenfeldEnclosurecc:LindaS.Adams,ActingSecretary,CaliforniaEPAMaryNichols,Chairman,CARBJamesGoldstene,ExecutiveOfficer,CARBLynnTerry,DeputyExecutiveOfficer,CARBKennethKoyama,ExecutiveDirector,CAPCOA,OSr4UNITEDSTATESENVIRONMENTALPROTECTIONAGENCYREGIONIXPRO175HawthorneStreetSanFrancisco,CA94105.3901OFFICEOFTHEREGIONAL.ADMINISTRATORMarch29,2011HonorableNeilAbercrombieStateofHawaiiExecutiveChambers,StateCapitolHonolulu,HI96813DearGovernorAbercronibie:IamwritingtoprovideyouwithguidancefordesignatingareasinHawaiiundertherecentlyrevisedprimaryNationalAmbientAirQualityStandard(NAAQS)forSulfurDioxide(S02).WearerequestingyourrecommendationsfordesignatingareaswithinyourStatebyJune3,2011.OnJune3,2010,theU.S.EnvironmentalProtectionAgency(EPA)revisedthehealthbasedNAAQSforSO2byestablishinganew1-hourstandardatalevelof75partsperbillion(ppb).Thisnew1-hourstandardwillprotectpublichealthbyreducingpeople’sexposuretohighshort-term(5-minuteto24-hour)concentrationsofSO2.Anareameetsthenewstandardwhenthe3-yearaverageofthe99thpercentileof1-hourdailymaximumconcentrationsdoesnotexceed75ppb.Section107(d)(1)oftheCleanAirAct(CAA)describestheprocessEPAfollowsfordesignatingareasasmeetingornotmeetinganeworrevisedNAAQS.Withinoneyearofestablishinganeworrevisedstandard,eachgovernormustrecommendadesignationofattainment,nonattainmentorunclassifiable,withappropriateboundaries,forareaswithintheirjurisdiction.Therefore,weaskthatyourStateprovidedesignationrecommendations,includingappropriateareaboundaries,forallareasbyJune3,2011,withrespecttothe1-hourSO2NAAQS.Theenclosedmemorandumprovidesguidancetostate,territoryandlocalairpollutioncontrolagenciesandtribesonthetimelineandprocessfordesignatingareasundertherevisedSO2standard.Weplantoannounceourintendeddesignationsnolaterthan120dayspriortopromulgatingfinaldesignations.Followingtheannouncementofintendeddesignations,states,teritoriesandtribeswillhavetheopportunitytocommentonanymodificationsEPAproposestotheirrecommendations.EPAintendstocompletedesignationsnolaterthanJune3,2012.PrintedonRecycledPaperEstablishing

area designations

is

a key

step

in the process

of providing

the health protection

intended

by

the CAA.

Should

you have

any questions

regarding

this matter,

please

do not hesitate

to contact

me

or have

your

staff

call Deborah

Jordan,

Air Division

Director,

at (415) 947-8715.

Sincerely, Jared Blumenfeld Enclosure cc: Gary

Gill, Deputy Director,

Hawaii

DOH Wilfred

K. Nagamine,

Manager,

Clean

Air Branch,

Hawaii

DOHSr41IUNITEDSTATESENVIRONMENTALPROTECTIONAGENCY_____REGIONIX75HawthorneStreetSanFrancisco,CA94105-3901OFFiCEOFTHEREGIONALADMINISTRATORMarch29,2011HonorableBrianSandovalStateofNevada101NorthCarsonStreetCarsonCity,NV89701DearGovernorSandoval:IamwritingtoprovideyouwithguidancefordesignatingareasinNevadaundertherecentlyrevisedprimaryNationalAmbientAirQualityStandard(NAAQS)forSulfurDioxide(S02).WearerequestingyourrecommendationsfordesignatingareaswithinyourStatebyJune3,2011.OnJune3,2010,theU.S.EnvironmentalProtectionAgency(EPA)revisedthehealthbasedNAAQSforSO2byestablishinganew1-hourstandardatalevelof75partsperbillion(ppb).Thisnew1-hourstandardwillprotectpublichealthbyreducingpeople’sexposuretohighshort-term(5-minuteto24-hour)concentrationsofSO2.Anareameetsthenewstandardwhenthe3-yearaverageofthe99thpercentileof1-hourdailymaximumconcentrationsdoesnotexceed75ppb.Section107(d)(1)oftheCleanAirAct(CAA)describestheprocessEPAfollowsfordesignatingareasasmeetingornotmeetinganeworrevisedNAAQS.Withinoneyearofestablishinganeworrevisedstandard,eachgovernormustrecommendadesignationofattainment,nonattainmentorunclassifiable,withappropriateboundaries,forareaswithintheirjurisdiction.rfhereforeweaskthatyourStateprovidedesignationrecommendations,includingappropriateareaboundaries,forallareasbyJune3,2011,withrespecttothe1-hourSO2NAAQS.Theenclosedmemorandumprovidesguidancetostate,territoryandlocalairpollutioncontrolagenciesandtribesonthetimelineandprocessfordesignatingareasundertherevisedSO2standard.Weplantoannounceourintendeddesignationsnolaterthan120dayspriortopromulgatingfinaldesignations.Followingtheannouncementofintendeddesignations,states,territoriesandtribeswillhavetheopportunitytocommentonanymodificationsEPAproposestotheirrecommendations.EPAintendstocompletedesignationsnolaterthanJune3,2012.PrintedonRecycledPaperEstablishing

area designations

is

a key

step

in the process

of providing

the health protection

intended

by

the CAA.

Should

you have

any questions

regarding

this matter,

please

do not hesitate

to contact

me

or have

your

staff

call Deborah

Jordan,

Air Division

Director,

at (415) 947-8715.

Sincerely, Jared Blumenfeld Enclosure cc: Colleen

Cripps, Administrator,

NDEP Greg Remer,

Bureau

Chief, Bureau

of Air Quality Planning,

NDEP Kevin

Dick, Director

for

the Division

of Air Quality Management,

WCHD Lewis Wallenmeyer,

Director, CCDAQEMS7qIUNITEDSTATESENVIRONMENTALPROTECTIONAGENCYREGIONIX(PRO1’75HawthorneStreetSanFrancisco,CA941053901OFFICEOFTHEREGIONALADMINISTRATORMarch29,2011HonorableTogiolaT.A.TulafonoTerritoryofAmericanSamoaA.P.LutaliExecutiveOfficeBuildingPagoPago,AmericanSamoa96799DearGovernorTulafono:IamwritingtoprovideyouwithguidancefordesignatingareasinAmericanSamoaundertherecentlyrevisedprimaryNationalAmbientAirQualityStandard(NAAQS)forSulfurDioxide(S02).WearerequestingyourrecommendationsfordesignatingareaswithinyourTerritorybyJune3,2011.OnJune3,2010,theU.S.EnvironmentalProtectionAgency(EPA)revisedthehealthbasedNAAQSforSO2byestablishinganew1-hourstandardatalevelof75partsperbillion(ppb).Thisnew1-hourstandardwillprotectpublichealthbyreducingpeople’sexposuretohighshort-term(5-minuteto24-hour)concentrationsofSO2.Anareameetsthenewstandardwhenthe3-yearaverageofthe99thpercentileof1-hourdailymaximumconcentrationsdoesnotexceed75ppb.Section107(d)(i)oftheCleanAirAct(CAA)describestheprocessEPAfollowsfordesignatingareasasmeetingornotmeetinganeworrevisedNAAQS.Withinoneyearofestablishinganeworrevisedstandard,eachgovernormustrecommendadesignationofattainment,nonattainmentorunclassifiable,withappropriateboundaries,forareaswithintheirjurisdiction.Therefore,weaskthatyourTerritoryprovidedesignationrecommendations,includingappropriateareaboundaries,forallareasbyJune3,2011,withrespecttothe1-hourSO2NAAQS.Theenclosedmemorandumprovidesguidancetostate,territoryandlocalairpollutioncontrolagenciesandtribesonthetirnelineandprocessfordesignatingareasundertherevisedSO2standard.Weplantoarmounceourintendeddesignationsnolaterthan120dayspriortopromulgatingfinaldesignations.Followingtheannouncementofintendeddesignations,states,territoriesandtribeswillhavetheopportunitytocommentonanymodificationsEPAproposestotheirrecommendations.EPAintendstocompletedesignationsnolaterthanJune3,2012.PrintedonRecycledPaperEstablishingareadesignationsisakeystepintheprocessofprovidingthehealthprotectionintendedbytheCAA.Shouldyouhaveanyquestionsregardingthismatter,pleasedonothesitatetocontactmeorhaveyourstaffcallDeborahJordan,AirDivisionDirector,at(415)947-8715.Sincerely,JaredBlumenfeldEnclosurecc:Dr.To’afaVaiaga’e,Director,AmericanSamoaEPAFaamaoAsalele,AssistantDirector,AmericanSamoaEPASTq1.IUNITEDSTATESENVIRONMENTALPROTECTIONAGENCYREGIONIXoi75HawthorneStreetSanFrancisco,CA94105-3901OFFICEOFTHEREGIONALADMINISTRATORMarch29,2011HonorableBenignoR.FitialCommonwealthoftheNorthernMarianaIslandsJuanA.SabianMemorialBuildingCapitolHillSaipan,MP96950DearGovernorFitial:IamwritingtoprovideyouwithguidancefordesignatingareasintheNorthernMarianaIslandsundertherecentlyrevisedprimaryNationalAmbientAirQualityStandard(NAAQS)forSulfurDioxide(S02).WearerequestingyourrecommendationsfordesignatingareaswithinyourTerritorybyJune3,2011.OnJune3,2010,theU.S.EnvironmentalProtectionAgency(EPA)revisedthehealthbasedNAAQSforSO2byestablishinganew1-hourstandardatalevelof75partsperbillion(ppb).Thisnew1-hourstandardwillprotectpublichealthbyreducingpeople’sexposuretohighshort-term(5-minuteto24-hour)concentrationsofSO2.Anareameetsthenewstandardwhenthe3-yearaverageofthe99thpercentileof1-hourdailymaximumconcentrationsdoesnotexceed75ppb.Section107(d)(i)oftheCleanAirAct(CAA)describestheprocessEPAfollowsfordesignatingareasasmeetingornotmeetinganeworrevisedNAAQS.Withinoneyearofestablishinganeworrevisedstandard,eachgovernormustrecommendadesignationofattainment,nonattainmentorunclassifiable,withappropriateboundaries,forareaswithintheirjurisdiction.Therefore,weaskthatyourTerritoryprovidedesignationrecommendations,includingappropriateareaboundaries,forallareasbyJune3,2011,withrespecttothe1-hourSO2NAAQS.Theenclosedmemorandumprovidesguidancetostate,territoryandlocalairpollutioncontrolagenciesandtribesonthetimelineandprocessfordesignatingareasundertherevisedSO2standard.Weplantoannounceourintendeddesignationsnolaterthan120dayspriortopromulgatingfinaldesignations.Followingtheannouncementofintendeddesignations,states,territoriesandtribeswillhavetheopportunitytocommentonanymodificationsEPAproposestotheirrecommendations.EPAintendstocompletedesignationsnolaterthanJune3,2012.PrintedonRecycledPaperEstablishing

area designations

is

a key

step

in the process

of providing

the health protection

intended

by

the CAA.

Should

you have

any questions

regarding

this matter,

please

do not hesitate

to contact

me

or have

your

staff

call Deborah

Jordan,

Air Division

Director,

at (415) 947-8715.

Sincerely, Jared Blumenfeld Enclosure cc: Frank Rabauliman,

Director,

CNMI Division

of Environmental

Quality.$,psq,UNITEDSTATESENVIRONMENTALPROTECTIONAGENCYREGIONIX1’75HawthorneStreetSanFrancisco,CA94105-3901OFFICEOFTHEMarch29,2011REGIONALADMINISTRATORHonorableEddieBazaCalvoTerritoryofGuamRicardoJ.BordalloGovernor’sComplexAdelup,Guam96910DearGovernorCalvo:IamwritingtoprovideyouwithguidancefordesignatingareasinGuamundertherecentlyrevisedprimaryNationalAmbientAirQualityStandard(NAAQS)forSulfurDioxide(S02).WearerequestingyourrecommendationsfordesignatingareaswithinyourTerritorybyJune3,2011.OnJune3,2010,theU.S.EnvironmentalProtectionAgency(EPA)revisedthehealthbasedNAAQSforSO2byestablishinganew1-hourstandardatalevelof75partsperbillion(ppb).Thisnew1-hourstandardwillprotectpublichealthbyreducingpeople’sexposuretohighshort-term(5-minuteto24-hour)concentrationsofSO2.Anareameetsthenewstandardwhenthe3-yearaverageofthe99thpercentileof1-hourdailymaximumconcentrationsdoesnotexceed75ppb.Section107(d)(1)oftheCleanAirAct(CAA)describestheprocessEPAfollowsfordesignatingareasasmeetingornotmeetinganeworrevisedNAAQS.Withinoneyearofestablishinganeworrevisedstandard,eachgovernormustrecommendadesignationofattainment,nonattainmentorunclassifiable,withappropriateboundaries,forareaswithintheirjurisdiction.Therefore,weaskthatyourTerritoryprovidedesignationrecommendations,includingappropriateareaboundaries,forallareasbyJune3,2011,withrespecttothe1-hourSO2NAAQS.Theenclosedmemorandumprovidesguidancetostate,territoryandlocalairpollutioncontrolagenciesandtribesonthetimelineandprocessfordesignatingareasundertherevisedSO2standard.Weplantoannounceourintendeddesignationsnolaterthan120dayspriortopromulgatingfinaldesignations.Followingtheannouncementofintendeddesignations,states,territoriesandtribeswillhavetheopportunitytocommentonanymodificationsEPAproposestotheirrecommendations.EPAintendstocompletedesignationsnolaterthanJune3,2012.PrintedonRecycledPapera Establishing

area designations

is

a key

step

in the process

of providing

the health protection

intended

by

the CAA.

Should

you have

any questions

regarding

this matter,

please

do not hesitate

to contact

me

or have

your

staff

call Deborah

Jordan,

Air Division

Director,

at (415) 947-8715.

Sincerely, Jared Blumenfeld Enclosure cc:

Ivan Quinata,

Acting Administrator,

Guam

EPA Peter

Cruz,

Air Pollution

Control Program

Manager,

Guam

EPA..,-2I.