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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

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WASHINGTON, D.C. 20460 

4L PRO1

OFFICE OF


AIR AND RADATON 

The Honorable Benjamin L. Cardin 

United States Senate 

Washington, D.C. 20510 

Dear Senator Cardin: 

Thank you for your letter of November 29, 2012 to President Obama, co-signed by 12 of your 

colleagues, urging the prompt proposal of "Tier 3" light-duty vehicle emissions and gasoline standards. 

The U.S. Environmental Protection Agency is developing the Tier 3 standards to respond to the critical 

need to improve air quality and to enable a harmonized national vehicle emissions control program. We 

agree that the Tier 3 standards would have many health and economic benefits. 

As mentioned in your letter, this Tier 3 rule would reduce motor vehicle emissions and help state and 

local areas attain and maintain the existing health-based air quality standards in a cost-effective and 

timely way. The reductions in ozone and particulate matter would avoid premature mortality and other 

health impacts, including respiratory symptoms in children and exacerbation of asthma. 

The Tier 3 standards would also create a comprehensive regulatory approach that provides certainty for 

both the auto and oil industries. Under a single harmonized national vehicle program, the Tier 3 

standards under consideration would provide for coordinated implementation with the California vehicle 

program and the EPA and Department of Transportation's recently finalized light-duty vehicle standards 

to reduce carbon pollution and improve fuel economy for model years 2017 through 2025. We recognize 

that the Tier 3 program is critical to addressing the impacts of motor vehicles on air quality and public 

health; therefore we intend to propose Tier 3 standards in the Spring of 2013 and finalize these standards 

by the end of 2013. 

Again, thank you for your letter. If you have further questions, please contact me or your staff may call 

Patricia Haman in EPA's Office of Congressional and Intergovernmental Relations at (202) 564-2806. 

Gina McCarthy 

Assistant Administrator 

Internet Address (URL) . bttp //wwwepa gov


Recycled/Recyclable Printed with Vegetable Oil Based Inks on l00% Postconsumer Process Chlorine Free Recycled Paper
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 


WASHINGTON, DC. 20460

OFFICE OF


AIR AND RADIATION 

The Honorable Kirsten E. Gillibrand 

United States Senate 

Washington, D.C. 20510 

Dear Senator Gillibrand: 

Thank you for your letter of November 29, 2012 to President Obama, co-signed by 12 of your 

colleagues, urging the prompt proposal of "Tier 3" light-duty vehicle emissions and gasoline standards. 

The U.S. Environmental Protection Agency is developing the Tier 3 standards to respond to the critical 

need to improve air quality and to enable a harmonized national vehicle emissions control program. We 

agree that the Tier 3 standards would have many health and economic benefits. 

As mentioned in your letter, this Tier 3 rule would reduce motor vehicle emissions and help state and 

local areas attain and maintain the existing health-based air quality standards in a cost-effective and 

timely way. The reductions in ozone and particulate matter would avoid premature mortality and other 

health impacts, including respiratory symptoms in children and exacerbation of asthma. 

The Tier 3 standards would also create a comprehensive regulatory approach that provides certainty for 

both the auto and oil industries. Under a single harmonized national vehicle program, the Tier 3 

standards under consideration would provide for coordinated implementation with the California vehicle 

program and the EPA and Department of Transportation!s recently finalized light-duty vehicle standards 

to reduce carbon pollution and improve fuel economy for model years 2017 through 2025. We recognize 

that the Tier 3 program is critical to addressing the impacts of motor vehicles on air quality and public 

health; therefore we intend to propose Tier 3 standards in the Spring of 2013 and finalize these standards 

by the end of 2013. 

Again, thank you for your letter. If you have further questions, please contact me or your staff may call 

Patricia Haman in EPA's Office of Congressional and Intergovernmental Relations at (202) 564-2806. 

Gina McCarthy 

Assistant Administrator 

Internet Address (URL) . http //wwwepa gov 


Recycled/Recyclable Printed with Vegetable Oil Based Inks on 1000/0 Postconsumer, Process Chlorrne Free Recycled Paper
S7.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 


WASHINGTON, DC. 20460 

'L 'iOt

OFFICL OF


AIR AND RADIATION 

The Honorable Patty Murray 

United States Senate 

Washington, D.C. 20510 

Dear Senator Murray: 

Thank you for your letter of November 29, 2012 to President Obama, co-signed by 12 of your 

colleagues, urging the prompt proposal of "Tier 3" light-duty vehicle emissions and gasoline standards. 

The U.S. Environmental Protection Agency is developing the Tier 3 standards to respond to the critical 

need to improve air quality and to enable a harmonized national vehicle emissions control program. We 

agree that the Tier 3 standards would have many health and economic benefits. 

As mentioned in your letter, this Tier 3 rule would reduce motor vehicle emissions and help state and 

local areas attain and maintain the existing health-based air quality standards in a cost-effective and 

timely way. The reductions in ozone and particulate matter would avoid premature mortality and other 

health impacts, including respiratory symptoms in children and exacerbation of asthma. 

The Tier 3 standards would also create a comprehensive regulatory approach that provides certainty for 

both the auto and oil industries. Under a single harmonized national vehicle program, the Tier 3 

standards under consideration would provide for coordinated implementation with the California vehicle 

program and the EPA and Department of Transportation's recently finalized light-duty vehicle standards 

to reduce carbon pollution and improve fuel economy for model years 2017 through 2025. We recognize 

that the Tier 3 program is critical to addressing the impacts of motor vehicles on air quality and public 

health; therefore we intend to propose Tier 3 standards in the Spring of 2013 and finalize these standards 

by the end of 2013. 

Again, thank you for your letter. If you have further questions, please contact me or your staff may call 

Patricia Haman in EPA's Office of Congressional and Intergovernmental Relations at (202) 564-2806. 

Gina McCarthy 

Assistant Administrator 

Internet Address (URL) http //www epagov


Recycled/Recyclable . Printed with Vegetable Oil Based Inks on 100% Postconsumer. Process Chlorine Free Recycled Paper
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-	

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 

WASHINGTON, D.C. 20460

OFFICE OF


AIR AND RADIATION 

The Honorable Richard J. Durbin 

United States Senate 

Washington, D.C. 20510 

Dear Senator Durbin: 

Thank you for your letter of November 29, 2012 to President Obama, co-signed by 12 of your 

colleagues, urging the prompt proposal of "Tier 3" light-duty vehicle emissions and gasoline standards. 

The U.S. Environmental Protection Agency is developing the Tier 3 standards to respond to the critical 

need to improve air quality and to enable a harmonized national vehicle emissions control program. We 

agree that the Tier 3 standards would have many health and economic benefits. 

As mentioned in your letter, this Tier 3 rule would reduce motor vehicle emissions and help state and 

local areas attain and maintain the existing health-based air quality standards in a cost-effective and 

timely way. The reductions in ozone and particulate matter would avoid premature mortality and other 

health impacts, including respiratory symptoms in children and exacerbation of asthma. 

The Tier 3 standards would also create a comprehensive regulatory approach that provides certainty for 

both the auto and oil industries. Under a single harmonized national vehicle program, the Tier 3 

standards under consideration would provide for coordinated implementation with the California vehicle 

program and the EPA and Department of Transportation's recently finalized light-duty vehicle standards 

to reduce carbon pollution and improve fuel economy for model years 2017 through 2025. We recognize 

that the Tier 3 program is critical to addressing the impacts of motor vehicles on air quality and public 

health; therefore we intend to propose Tier 3 standards in the Spring of 2013 and finalize these standards 

by the end of 2013. 

Again, thank you for your letter. If you have further questions, please contact me or your staff may call 

Patricia Haman in EPA's Office of Congressional and Intergovernmental Relations at (202) 564-2806. 

Gina McCarthy 

Assistant Administrator 

Internet Address (URL) . http //www epa gov


Recycled/Recyclable Pnnted with Vegetable Oil Based Inks on 1000/o PostconsLjmer, Process Chlorine Free Recycled Paper
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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 


WASHINGTON, DC. 20460

OEFCE OF


AIR AND RADIATON 

The Honorable Frank R. Lautenberg 

United States Senate 

Washington, D.C. 20510 

Dear Senator Lautenberg: 

Thank you for your letter of November 29, 2012 to President Obama, co-signed by 12 of your 

colleagues, urging the prompt proposal of "Tier 3" light-duty vehicle emissions and gasoline standards. 

The U.S. Environmental Protection Agency is developing the Tier 3 standards to respond to the critical 

need to improve air quality and to enable a harmonized national vehicle emissions control program. We 

agree that the Tier 3 standards would have many health and economic benefits. 

As mentioned in your letter, this Tier 3 rule would reduce motor vehicle emissions and help state and 

local areas attain and maintain the existing health-based air quality standards in a cost-effective and 

timely way. The reductions in ozone and particulate matter would avoid premature mortality and other 

health impacts, including respiratory symptoms in children and exacerbation of asthma. 

The Tier 3 standards would also create a comprehensive regulatory approach that provides certainty for 

both the auto and oil industries. Under a single harmonized national vehicle program, the Tier 3 

standards under consideration would provide for coordinated implementation with the California vehicle 

program and the EPA and Department of Transportation's recently finalized light-duty vehicle standards 

to reduce carbon pollution and improve fuel economy for model years 2017 through 2025. We recognize 

that the Tier 3 program is critical to addressing the impacts of motor vehicles on air quality and public 

health; therefore we intend to propose Tier 3 standards in the Spring of 2013 and finalize these standards 

by the end of 2013. 

Again, thank you for your letter. If you have further questions, please contact me or your staff may call 

Patricia Haman in EPA's Office of Congressional and Intergovernmental Relations at (202) 564-2806. 

Gina McCarthy 

Assistant Administrator 

Internet Address (URL) http //www epagov


Recycled/Recyclable . Prrnted with Vegetable Oil Based Inks on 100% Postconsumer, Process ChlorLne Free Recycled Paper
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( PRO1

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 


WASHINGTON, DC. 20460

OFFICE OF


AIR AND RADIATION 

The Honorable Jeff Merkley 

United States Senate 

Washington, D.C. 20510 

Dear Senator Merkley: 

Thank you for your letter of November 29, 2012 to President Obama, co-signed by 12 of your 

colleagues, urging the prompt proposal of "Tier 3" light-duty vehicle emissions and gasoline standards. 

The U.S. Environmental Protection Agency is developing the Tier 3 standards to respond to the critical 

need to improve air quality and to enable a harmonized national vehicle emissions control program. We 

agree that the Tier 3 standards would have many health and economic benefits. 

As mentioned in your letter, this Tier 3 rule would reduce motor vehicle emissions and help state and 

local areas attain and maintain the existing health-based air quality standards in a cost-effective and 

timely way. The reductions in ozone and particulate matter would avoid premature mortality and other 

health impacts, including respiratory symptoms in children and exacerbation of asthma. 

The Tier 3 standards would also create a comprehensive regulatory approach that provides certainty for 

both the auto and oil industries. Under a single harmonized national vehicle program, the Tier 3 

standards under consideration would provide for coordinated implementation with the California vehicle 

program and the EPA and Department of Transportation's recently finalized light-duty vehicle standards 

to reduce carbon pollution and improve fuel economy for model years 2017 through 2025. We recognize 

that the Tier 3 program is critical to addressing the impacts of motor vehicles on air quality and public 

health; therefore we intend to propose Tier 3 standards in the Spring of 2013 and finalize these standards 

by the end of 2013. 

Again, thank you for your letter. If you have further questions, please contact me or your staff may call 

Patricia Haman in EPA's Office of Congressional and Intergovernmental Relations at (202) 564-2806. 

Gina McCarthy 

Assistant Administrator 

Internet Address (URL) . http//wwepa gov


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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 


WASHINGTON, D.C. 20460

OFFICE OF


AIR AND RADIATION 

The Honorable Sheldon Whitehouse 

United States Senate 

Washington, D.C. 20510 

Dear Senator Whitehouse: 

Thank you for your letter of November 29, 2012 to President Obama, co-signed by 12 of your 

colleagues, urging the prompt proposal of "Tier 3" light-duty vehicle emissions and gasoline standards. 

The U.S. Environmental Protection Agency is developing the Tier 3 standards to respond to the critical 

need to improve air quality and to enable a harmonized national vehicle emissions control program. We 

agree that the Tier 3 standards would have many health and economic benefits. 

As mentioned in your letter, this Tier 3 rule would reduce motor vehicle emissions and help state and 

local areas attain and maintain the existing health-based air quality standards in a cost-effective and 

timely way. The reductions in ozone and particulate matter would avoid premature mortality and other 

health impacts, including respiratory symptoms in children and exacerbation of asthma. 

The Tier 3 standards would also create a comprehensive regulatory approach that provides certainty for 

both the auto and oil industries. Under a single harmonized national vehicle program, the Tier 3 

standards under consideration would provide for coordinated implementation with the California vehicle 

program and the EPA and Department of Transportation's recently finalized light-duty vehicle standards 

to reduce carbon pollution and improve fuel economy for model years 2017 through 2025. We recognize 

that the Tier 3 program is critical to addressing the impacts of motor vehicles on air quality and public 

health; therefore we intend to propose Tier 3 standards in the Spring of 2013 and finalize these standards 

by the end of 2013. 

Again, thank you for your letter. If you have further questions, please contact me or your staff may call 

Patricia Haman in EPA's Office of Congressional and Intergovernmental Relations at (202) 564-2806. 

Gina McCarthy 

Assistant Administrator 

Internet Address (URL) http//wwwepa gov


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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 


WASHINGTON, DC. 20460

OFFICE OF


AIR AND RADIATION 

The Honorable Robert Menendez 

United States Senate 

Washington, D.C. 20510 

Dear Senator Menendez: 

Thank you for your letter of November 29, 2012 to President Obama, co-signed by 12 of your 

colleagues, urging the prompt proposal of "Tier 3" light-duty vehicle emissions and gasoline standards. 

The U.S. Environmental Protection Agency is developing the Tier 3 standards to respond to the critical 

need to improve air quality and to enable a harmonized national vehicle emissions control program. We 

agree that the Tier 3 standards would have many health and economic benefits. 

As mentioned in your letter, this Tier 3 rule would reduce motor vehicle emissions and help state and 

local areas attain and maintain the existing health-based air quality standards in a cost-effective and 

timely way. The reductions in ozone and particulate matter would avoid premature mortality and other 

health impacts, including respiratory symptoms in children and exacerbation of asthma. 

The Tier 3 standards would also create a comprehensive regulatory approach that provides certainty for 

both the auto and oil industries. Under a single harmonized national vehicle program, the Tier 3 

standards under consideration would provide for coordinated implementation with the California vehicle 

program and the EPA and Department of Transportation's recently finalized light-duty vehicle standards 

to reduce carbon pollution and improve fuel economy for model years 2017 through 2025. We recognize 

that the Tier 3 program is critical to addressing the impacts of motor vehicles on air quality and public 

health; therefore we intend to propose Tier 3 standards in the Spring of 2013 and finalize these standards 

by the end of 2013. 

Again, thank you for your letter. If you have further questions, please contact me or your staff may call 

Patricia Haman in EPA's Office of Congressional and Intergovernmental Relations at (202) 564-2806. 

Gina McCarthy 

Assistant Administrator 

Internet Address (URL) http//wwwepa gov


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UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 


WASHINGTON, D.C. 20460

OPFICL OF


AIR AND RADIATON 

The Honorable Charles E. Schumer 

United States Senate 

Washington, D.C. 20510 

Dear Senator Schumer: 

Thank you for your letter of November 29, 2012 to President Obama, co-signed by 12 of your 

colleagues, urging the prompt proposal of "Tier 3" light-duty vehicle emissions and gasoline standards. 

The U.S. Environmental Protection Agency is developing the Tier 3 standards to respond to the critical 

need to improve air quality and to enable a harmonized national vehicle emissions control program. We 

agree that the Tier 3 standards would have many health and economic benefits. 

As mentioned in your letter, this Tier 3 rule would reduce motor vehicle emissions and help state and 

local areas attain and maintain the existing health-based air quality standards in a cost-effective and 

timely way. The reductions in ozone and particulate matter would avoid premature mortality and other 

health impacts, including respiratory symptoms in children and exacerbation of asthma. 

The Tier 3 standards would also create a comprehensive regulatory approach that provides certainty for 

both the auto and oil industries. Under a single harmonized national vehicle program, the Tier 3 

standards under consideration would provide for coordinated implementation with the California vehicle 

program and the EPA and Department of Transportation's recently finalized light-duty vehicle standards 

to reduce carbon pollution and improve fuel economy for model years 2017 through 2025. We recognize 

that the Tier 3 program is critical to addressing the impacts of motor vehicles on air quality and public 

health; therefore we intend to propose Tier 3 standards in the Spring of 2013 and finalize these standards 

by the end of 2013. 

Again, thank you for your letter. If you have further questions, please contact me or your staff may call 

Patricia Haman in EPA's Office of Congressional and Intergovernmental Relations at (202) 564-2806. 

Gina McCarthy 

Assistant Administrator 

Internet Address (URL) http //www epagov


Recycled/Recyclable Printed with Vegetable Oil Based Inks on 1000/o Postconsumer, Process Chlorine Free Recycled Paper
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 


WASHINGTON, DC. 20460

OFFICE OF


AIR AND RADIATION 

The Honorable Richard Blumenthal 

United States Senate 

Washington, D.C. 20510 

Dear Senator Blumenthal: 

Thank you for your letter of November 29, 2012 to President Obama, co-signed by 12 of your 

colleagues, urging the prompt proposal of "Tier 3" light-duty vehicle emissions and gasoline standards. 

The U.S. Environmental Protection Agency is developing the Tier 3 standards to respond to the critical 

need to improve air quality and to enable a harmonized national vehicle emissions control program. We 

agree that the Tier 3 standards would have many health and economic benefits. 

As mentioned in your letter, this Tier 3 rule would reduce motor vehicle emissions and help state and 

local areas attain and maintain the existing health-based air quality standards in a cost-effective and 

timely way. The reductions in ozone and particulate matter would avoid premature mortality and other 

health impacts, including respiratory symptoms in children and exacerbation of asthma. 

The Tier 3 standards would also create a comprehensive regulatory approach that provides certainty for 

both the auto and oil industries. Under a single harmonized national vehicle program, the Tier 3 

standards under consideration would provide for coordinated implementation with the California vehicle 

program and the EPA and Department of Transportation's recently finalized light-duty vehicle standards 

to reduce carbon pollution and improve fuel economy for model years 2017 through 2025. We recognize 

that the Tier 3 program is critical to addressing the impacts of motor vehicles on air quality and public 

health; therefore we intend to propose Tier 3 standards in the Spring of 2013 and finalize these standards 

by the end of 2013. 

Again, thank you for your letter. If you have further questions, please contact me or your staff may call 

Patricia Haman in EPA's Office of Congressional and Intergovernmental Relations at (202) 564-2806. 

Gina McCarthy 

Assistant Administrator 

Internet Address (URL) . http //www epa gov


Recycled/Recyclabie . Printed with Vegetable Oil Based Inks on 1000/o Postconsumer, Process Chlorine Free Recycled Paper
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY 


WASHINGTON, D.C. 20460

OFFICE OF


AIR AND RADIATION 

The Honorable Sherrod Brown 

United States Senate 

Washington, D.C. 20510 

Dear Senator Brown: 

Thank you for your letter of November 29, 2012 to President Obama, co-signed by 12 of your 

colleagues, urging the prompt proposal of "Tier 3" light-duty vehicle emissions and gasoline standards. 

The U.S. Environmental Protection Agency is developing the Tier 3 standards to respond to the critical 

need to improve air quality and to enable a harmonized national vehicle emissions control program. We 

agree that the Tier 3 standards would have many health and economic benefits. 

As mentioned in your letter, this Tier 3 rule would reduce motor vehicle emissions and help state and 

local areas attain and maintain the existing health-based air quality standards in a cost-effective and 

timely way. The reductions in ozone and particulate matter would avoid premature mortality and other 

health impacts, including respiratory symptoms in children and exacerbation of asthma. 

The Tier 3 standards would also create a comprehensive regulatory approach that provides certainty for 

both the auto and oil industries. Under a single harmonized national vehicle program, the Tier 3 

standards under consideration would provide for coordinated implementation with the California vehicle 

program and the EPA and Department of Transportation's recently finalized light-duty vehicle standards 

to reduce carbon pollution and improve fuel economy for model years 2017 through 2025. We recognize 

that the Tier 3 program is critical to addressing the impacts of motor vehicles on air quality and public 

health; therefore we intend to propose Tier 3 standards in the Spring of 2013 and finalize these standards 

by the end of 2013. 

Again, thank you for your letter. If you have further questions, please contact me or your staff may call 

Patricia Haman in EPA's Office of Congressional and Intergovernmental Relations at (202) 564-2806. 

Gina McCarthy 

Assistant Administrator 

Internet Address (URL) . http//wwwepa gov 


Recycled/Recyclable Printed with Vegetable Oil Based Inks on 100% Postconsumer, Process Chlorine Free Recycled Paper