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 June3,2011.

On June 3, 2010, the U.S. Environmental Protection Agency (EPA) revised the healthbased NAAQS for SO2by 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 SO2.An area meets the new standard

when the 3-year average of the 99th 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 ofestablishing 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 SO2

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

SO2standard. 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.

Prinred on Recycled Paper
Jared Blumenfeld

Enclosure

cc: Henry Darwin, Director, ADEQ

Eric Massey, Director, Air Quality Division, ADEQNancy Wrona, Policy Advisor, ADEQ
Honorable Jerry Brown

State of California

State Capital Building, Suite #1173Sacramento, CA 95814

Dear Governor Brown:

I am writing to provide you with guidance for designating areas in California 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 SO2by establishing a new I-hour standard at a level of 75 parts per billion

(ppb). This new 1-hour standard will protect public health by reducing people’s exposure to

high short-term (5-minute to 24-hour) concentrations of SO2.An area meets the new standard

when the 3-year average of the 99 percentile of 1-hour daily maximum concentrations does not

exceed 75 ppb.

Section 107(d)(1) 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 ofattainment, 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 SO2NAAQS.

The enclosed memorandum provides guidance to state, territory and local air pollution

control agencies and tribes on the timeline and process for designating areas under the revised

SO2standard. We plan to announce our intended designations no later than 120 days prior to

promulgating final designations. Following the announcement of intended designations, stales,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.

Printed on Recycled Paper
Jared Blumenfeld

Enclosure

cc: Linda S. Adams, Acting Secretary, California EPA

Mary Nichols, Chairman, CARB

James Goldstene, Executive Officer, CARBLynn Terry, Deputy Executive Officer, CARB

Kenneth Koyama, Executive Director, CAPCOA
Honorable Neil Abercrombie

State of HawaiiExecutive Chambers, State Capitol

Honolulu, HI 96813

Dear Governor Abercronibie:

I am writing to provide you with guidance for designating areas in Hawaii 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 June3,2011.

On June 3, 2010, the U.S. Environmental Protection Agency (EPA) revised the healthbased NAAQS for SO2by establishing a new 1-hour standard at a level of 75 parts per billion

(ppb). This new 1-hour standard will protect public health by reducing people’s exposure to

high short-term (5-minute to 24-hour) concentrations of SO2.An area meets the new standard

when the 3-year average of the 99th percentile of 1-hour daily maximum concentrations does notexceed 75 ppb.

Section 107(d)(1) 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 ofattainment, 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 SO2

NAAQS.

The enclosed memorandum provides guidance to state, territory and local air pollution

control agencies and tribes on the timeline and process for designating areas under the revised

SO2standard. We plan to announce our intended designations no later than 120 days prior to

promulgating final designations. Following the announcement of intended designations, states,

teritories 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.

Printed on Recycled Paper
Jared Blumenfeld

Enclosurecc: Gary Gill, Deputy Director, Hawaii DOH

Wilfred K. Nagamine, Manager, Clean Air Branch, Hawaii DOH
Honorable Brian Sandoval

State of Nevada

101 North Carson Street

Carson City, NV 89701

Dear Governor Sandoval:

I am writing to provide you with guidance for designating areas in Nevada 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 SO2by establishing a new 1-hour standard at a level of 75 parts per billion

(ppb). This new 1-hour standard will protect public health by reducing people’s exposure to

high short-term (5-minute to 24-hour) concentrations of SO2.An area meets the new standard

when the 3-year average of the 99th percentile of 1-hour daily maximum concentrations does not

exceed 75 ppb.

Section 107(d)(1) 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 ofestablishing a new or revised standard, each governor must recommend a designation of

attainment, nonattainment or unclassifiable, with appropriate boundaries, for areas within their

jurisdiction. rfherefore 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 SO2

NAAQS.

The enclosed memorandum provides guidance to state, territory and local air pollution

control agencies and tribes on the timeline and process for designating areas under the revised

SO2standard. We plan to announce our intended designations no later than 120 days prior topromulgating final designations. Following the announcement of intended designations, states,

territories and tribes will have the opportunity to comment on any modifications EPA proposesto their recommendations. EPA intends to complete designations no later than June 3, 2012.

Printed on Recycled Paper
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, CCDAQEM
Honorable Togiola T. A. Tulafono

Territory of American Samoa

A.P. Lutali Executive Office Building

Pago Pago, American Samoa 96799Dear Governor Tulafono:

I am writing to provide you with guidance for designating areas in American Samoa

under the recently revised primary National Ambient Air Quality Standard (NAAQS) for Sulfur

Dioxide (S02). We are requesting your recommendations for designating areas within yourTerritory by June 3, 2011.

On June 3, 2010, the U.S. Environmental Protection Agency (EPA) revised the healthbased NAAQS for SO2by establishing a new 1-hour standard at a level of 75 parts per billion

(ppb). This new 1-hour standard will protect public health by reducing people’s exposure to

high short-term (5-minute to 24-hour) concentrations of SO2.An area meets the new standard

when the 3-year average of the 99th percentile of 1-hour daily maximum concentrations does not

exceed 75 ppb.

Section 107(d)(i) 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 ofestablishing 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 Territory provide designation recommendations,

including appropriate area boundaries, for all areas by June 3, 2011, with respect to the 1-hour

SO2 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

SO2standard. We plan to armounce 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.

Printed on Recycled Paper
Jared Blumenfeld

Enclosure

cc: Dr. To’afa Vaiaga’e, Director, American Samoa EPA

Faamao Asalele, Assistant Director, American Samoa EPA
Honorable Benigno R. Fitial

Commonwealth of the Northern Mariana Islands

Juan A. Sabian Memorial Building

Capitol Hill

Saipan, MP 96950

Dear Governor Fitial:

I am writing to provide you with guidance for designating areas in the Northern Mariana

Islands under the recently revised primary National Ambient Air Quality Standard (NAAQS) for

Sulfur Dioxide (S02). We are requesting your recommendations for designating areas withinyour Territory by June 3, 2011.

On June 3, 2010, the U.S. Environmental Protection Agency (EPA) revised the healthbased NAAQS for SO2by establishing a new 1-hour standard at a level of 75 parts per billion

(ppb). This new 1-hour standard will protect public health by reducing people’s exposure to

high short-term (5-minute to 24-hour) concentrations of SO2.An area meets the new standard

when the 3-year average of the 99th percentile of 1-hour daily maximum concentrations does not

exceed 75 ppb.

Section 107(d)(i) 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 ofestablishing 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 Territory provide designation recommendations,

including appropriate area boundaries, for all areas by June 3, 2011, with respect to the 1-hour

SO2 NAAQS.

The enclosed memorandum provides guidance to state, territory and local air pollution

control agencies and tribes on the timeline and process for designating areas under the revised

SO2standard. We plan to announce 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.

Printed on Recycled Paper
Jared Blumenfeld

Enclosure

cc: Frank Rabauliman, Director, CNMI Division of Environmental Quality
Honorable Eddie Baza Calvo

Territory of GuamRicardo J. Bordallo Governor’s Complex

Adelup, Guam 96910

Dear Governor Calvo:

I am writing to provide you with guidance for designating areas in Guam 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 Territory by

June 3,2011.

On June 3, 2010, the U.S. Environmental Protection Agency (EPA) revised the healthbased NAAQS for SO2by establishing a new 1-hour standard at a level of 75 parts per billion

(ppb). This new 1-hour standard will protect public health by reducing people’s exposure to

high short-term (5-minute to 24-hour) concentrations of SO2.An area meets the new standard

when the 3-year average of the 99th percentile of 1-hour daily maximum concentrations does notexceed 75 ppb.

Section 107(d)(1) 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 ofattainment, nonattainment or unclassifiable, with appropriate boundaries, for areas within their

jurisdiction. Therefore, we ask that your Territory provide designation recommendations,

including appropriate area boundaries, for all areas by June 3, 2011, with respect to the 1-hourSO2 NAAQS.

The enclosed memorandum provides guidance to state, territory and local air pollution

control agencies and tribes on the timeline and process for designating areas under the revised

SO2standard. We plan to announce 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.

Printed on Recycled Paper
Jared Blumenfeld

Enclosure

cc: Ivan Quinata, Acting Administrator, Guam EPA

Peter Cruz, Air Pollution Control Program Manager, Guam EPA

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