Greenhouse Gas Emissions Standards and Fuel Efficiency Standards:

 
CONTENT

Federal Register: December 29, 2010 (Volume 75, Number 249)

Proposed Rules

Page 81952-81957

From the Federal Register Online via GPO Access [wais.access.gpo.gov]

DOCID:fr29de10-34

ENVIRONMENTAL PROTECTION AGENCY 40 CFR Parts 85, 86, 1036, 1037, 1065, 1066, and 1068

DEPARTMENT OF TRANSPORTATION

National Highway Traffic Safety Administration 49 CFR Parts 523, 534, and 535

EPA-HQ-OAR-2010-0162; FRL-9219-4; NHTSA 2010-0079

RIN 2060-AP61; RIN 2127-AK74

Greenhouse Gas Emissions Standards and Fuel Efficiency Standards for Medium- and Heavy-Duty Engines and Vehicles

AGENCIES: Environmental Protection Agency (EPA) and National Highway

Traffic Safety Administration (NHTSA), Department of Transportation

(DOT).

ACTION: Proposed rules; correction.

SUMMARY: NHTSA and EPA published in the Federal Register of November 30, 2010, proposed rules to establish a comprehensive Heavy-Duty

National Program that will increase fuel efficiency and reduce greenhouse gas emissions for on-road heavy-duty vehicles, responding to the President's directive on May 21, 2010, to take coordinated steps to produce a new generation of clean vehicles. That document inadvertently contained some incorrect fuel consumption values in NHTSA-specific tables in the preamble that resulted from using an incorrect conversion factor for determining CO2emissions to equivalent fuel consumption for gasoline fuel. That document also contained some rounding errors in NHTSA-specific tables in the preamble. This document corrects the rounding errors by adopting a uniform rounding approach for all fuel consumption equivalents for those NHTSA-specific tables and makes the appropriate corrections to the conversions.

FOR FURTHER INFORMATION CONTACT: Rebecca Yoon, Office of Chief Counsel,

National Highway Traffic Safety Administration, 1200 New Jersey Avenue,

SE., Washington, DC 20590. Telephone: (202) 366-2992.

SUPPLEMENTARY INFORMATION: NHTSA and EPA published in the Federal

Register of November 30, 2010, proposed rules to establish a comprehensive Heavy-Duty National Program that will increase fuel efficiency and reduce greenhouse gas emissions for on-road heavy-duty vehicles, responding to the President's directive on May 21, 2010, to take coordinated steps to produce a new generation of clean vehicles.

That document inadvertently contained some incorrect fuel consumption values in NHTSA-specific tables in the preamble that resulted from using an incorrect conversion factor for determining CO2 emissions to equivalent fuel consumption for gasoline fuel. The correct values that should have been used in the document are a factor of 1,018 grams of CO2per gallon of diesel for conversion of diesel fuel, and a factor of 8,887 grams of CO2per gallon of gasoline for gasoline.

That document also contained some rounding errors in NHTSA-specific tables in the preamble. This document corrects the rounding errors by adopting a uniform rounding approach for all fuel consumption equivalents and makes the

Page 81953

appropriate corrections to the conversions. These changes are made to several NHTSA-specific tables and in several places in the NHTSA- specific text of the preamble. The proposed regulatory text for both

NHTSA and EPA is not affected.

In FR Doc. 2010-28120, appearing on page 74152 in the Federal

Register of Tuesday, November 30, 2010, the following corrections are made: 1. On page 74176, correct Table II-1 and accompanying footnote 39 by revising them to read as follows:

Table II-1--Heavy-Duty Combination Tractor Emissions and Fuel Consumption Standards

Day cab

Sleeper cab

Class 7

Class 8

Class 8

2014 Model Year CO2 Grams per Ton-Mile

Low Roof........................................................

104

79

65

Mid Roof........................................................

104

79

70

High Roof.......................................................

118

87

73

2014-2016 Model Year Gallons of Fuel per 1,000 Ton-Mile \39\

Low Roof........................................................

10.2

7.8

6.4

Mid Roof........................................................

10.2

7.8

6.9

High Roof.......................................................

11.6

8.5

7.2

2017 Model Year CO2 Grams per Ton-Mile

Low Roof........................................................

103

78

64

Mid Roof........................................................

103

78

69

High Roof.......................................................

116

86

71

2017 Model Year Gallons of Fuel per 1,000 Ton-Mile

Low Roof........................................................

10.1

7.7

6.3

Mid Roof........................................................

10.1

7.7

6.8

High Roof.......................................................

11.4

8.4

7.0

2. On page 74194, correct Tables II-7 and II-8 by revising them to read as follows:

\39\ Manufacturers may voluntarily opt-in to the NHTSA fuel consumption program in 2014 or 2015. If a manufacturer opts-in, the program becomes mandatory. See Section I.B.5 for more information about NHTSA's voluntary opt-in program for MYs 2014 and 2015.

Table II-2--Coefficients for Proposed HD Pickup and Van Target Standards \74\

Model year

a

b

c

d

Diesel Vehicles: 2014....................................................

0.0478

368

0.000470

3.61 2015....................................................

0.0474

366

0.000466

3.60 2016....................................................

0.0460

354

0.000452

3.48 2017....................................................

0.0445

343

0.000437

3.37 2018 and later..........................................

0.0416

320

0.000409

3.14

Gasoline Vehicles: 2014....................................................

0.0482

371

0.000542

4.17 2015....................................................

0.0479

369

0.000539

4.15 2016....................................................

0.0469

362

0.000528

4.07 2017....................................................

0.0460

354

0.000518

3.98 2018 and later..........................................

0.0440

339

0.000495

3.81

Table II-3--Coefficients Proposed for NHTSA's First Alternative and EPA's Alternative HD Pickup and Van Target

Standards

Model year

a

b

c

d

Diesel Vehicles: 2014 \a\................................................

0.0478

368

0.000470

3.61 2015 \a\................................................

0.0474

366

0.000466

3.60 2016-2018...............................................

0.0440

339

0.000432

3.33 2019 and later..........................................

0.0416

320

0.000409

3.14

Gasoline Vehicles: 2014 \a\................................................

0.0482

371

0.000542

4.17 2015 \a\................................................

0.0479

369

0.000539

4.15

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2016-2018...............................................

0.0456

352

0.000513

3.96 2019 and later..........................................

0.0440

339

0.000495

3.81

3. On page 74202, correct Table II-11 by revising it to read as follows:

\74\ The NHTSA proposal provides voluntary standards for model years 2014 and 2015. Target line functions for 2016-2018 are for the second NHTSA alternative described in Section II.C(d)(ii).

Table II-4--Proposed Vocational Diesel Engine Standards Over the Heavy-Duty FTP Cycle

Medium

Model year

Standard

Light heavy- heavy-duty Heavy heavy- duty diesel

diesel duty diesel

2014-2016................................. CO2 Standard (g/bhp-hr)......

600

600

567

Voluntary Fuel Consumption

5.89

5.89

5.57

Standard (gallon/100 bhp-hr). 2017 and Later............................ CO2 Standard (g/bhp-hr)......

576

576

555

Fuel Consumption (gallon/100

5.66

5.66

5.45 bhp-hr).

4. On page 74202, in the third column, correct the first sentence of the first complete paragraph by revising it to read as follows:

``The baseline 2010 model year CO2performance of these heavy-duty gasoline engines over the Heavy-duty FTP cycle is 660 g

CO2/bhp-hr (7.43 gal/100 bhp-hr) in 2010 based on non-GHG certification data provided to EPA by the manufacturers.'' 5. On page 74202, in the third column, correct the first sentence of the second complete paragraph by revising it to read as follows:

``NHTSA is proposing a 7.06 gallon/100 bhp-hr standard for fuel consumption while EPA is proposing a 627 g CO2/bhp-hr standard tested over the Heavy-duty FTP, effective in the 2016 model year.'' 6. On page 74220, correct Table III-2 by revising it to read as follows:

Table III-5--Class 7 and 8 Tractor Baseline CO2 Emissions and Fuel Consumption

Class 7

Class 8

Day cab

Day cab

Sleeper cab

Low/mid roof

High roof

Low/mid roof

High roof

Low roof

Mid roof

High roof

CO2 (grams CO2/ton-mile).........

111

130

84

96

76

81

89

Fuel Consumption (gal/1,000 ton-

10.9

12.8

8.3

9.4

7.5

8.0

8.6 mile)...........................

7. On page 74225, correct Table III-6 by revising it to read as follows:

Table III-6--Proposed 2014 and 2017 Model Year Tractor Reductions

Class 7

Class 8

Day cab

Day cab

Sleeper cab

Low/mid roof

High roof

Low/mid roof

High roof

Low roof

Mid roof

High roof

2014 Model Year

2014 MY Voluntary Fuel

10.2

11.6

7.8

8.5

6.4

6.9

7.2

Consumption Standard (gallon/ 1,000 ton-mile).................

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2014 MY CO2 Standard (grams CO2/

104

118

79

87

65

70

73 ton-mile).......................

Percent Reduction................

6%

9%

6%

9%

15%

14%

18%

2017 Model Year

2017 MY Fuel Consumption Standard

10.1

11.4

7.7

8.4

6.3

6.8

7.0

(gallon/1,000 ton-mile)......... 2017 MY CO2 Standard (grams CO2/

103

116

78

86

64

69

71 ton-mile).......................

Percent Reduction................

7%

11%

7%

10%

16%

15%

20%

8. On page 74244, correct Table III-12 by revising it to read as follows:

Table III-7--Baseline Vocational Vehicle Performance

Vocational vehicle

Light heavy-duty Medium heavy-duty Heavy heavy-duty

Fuel Consumption Baseline (gallon/1,000 ton-mile)......

37.5

22.3

11.3

CO2 Baseline (grams CO2/ton-mile)......................

382

227

115

9. On page 74245, correct Table III-14 by revising it to read as follows:

Table III-8--Proposed Vocational Vehicle Standards and Percent Reductions

Vocational vehicle

Light heavy-duty Medium heavy-duty Heavy heavy-duty

2016 MY Fuel Consumption Standard (gallon/1,000 ton-

35.2

20.8

10.7 mile)................................................. 2017 MY Fuel Consumption Standard (gallon/1,000 ton-

33.8

20.0

10.5 mile)................................................. 2014 MY CO2 Standard (grams CO2/ton-mile)..............

358

212

109 2017 MY CO2 Standard (grams CO2/ton-mile)..............

344

204

107

Percent Reduction from 2010 baseline in 2014 MY........

6%

7%

5%

Percent Reduction from 2010 baseline in 2017 MY........

10%

10%

7%

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10. On page 74245, in the third column, correct the second sentence of the third paragraph by revising it to read as follows: ``The agencies are projecting a 100% application rate of this technology package to the heavy-duty gasoline engines, which results in a

CO2standard of 627 g/bhp-hr and a fuel consumption standard of 7.06 gallon/100 bhp-hr.'' 11. On page 74440, correct Table 1 by revising it to read as follows:

Table 1--Equation Coefficients for Vehicle Configuration Target

Standards

Model year

c

d

Alternative 1--Fixed Target Standards

Compression-Ignition Vehicle Coefficients for Model Years 2016 and Later

2016 through 2018.............................

0.000432

3.33 2019 and later................................

0.000409

3.14

Spark-Ignition Vehicle Coefficients for Model Years 2016 and Later

2016 through 2018.............................

0.000513

3.96 2019 and later................................

0.000495

3.81

Alternative 2--Phased-in Target Standards Compression-Ignition Vehicle

Coefficients for Model Years 2016 and Later

2016..........................................

0.000452

3.48 2017..........................................

0.000437

3.37 2018 and later................................

0.000409

3.14

Spark-Ignition Vehicle Coefficients for Model Years 2016 and Later

2016..........................................

0.000528

4.07 2017..........................................

0.000518

3.98 2018 and later................................

0.000495

3.81

12. On page 74442, correct Table 2 by revising it to read as follows:

Table 2--Voluntary Compliance Equation Coefficients for Vehicle Fuel

Consumption Standards

Model year

c

d

Compression-Ignition Vehicle Coefficients for Voluntary Compliance in

Model Years 2013 Through 2015

2013 and 14...................................

0.000470

3.61 2015..........................................

0.000466

3.60

Spark-Ignition Vehicle Coefficients for Voluntary Compliance in Model

Years 2013 Through 2015

2013 and 14...................................

0.000542

4.17 2015..........................................

0.000539

4.15

13. On page 74444, correct Table 4 by revising it to read as follows:

Table 4--Truck Tractor Fuel Consumption Standards

Day cab

Sleeper cab

Regulatory subcategories

--------------------------------------

Class 7

Class 8

Class 8

Fuel Consumption Standards (gallons per 1000 ton-miles) Effective for

Model Years 2017 and Later

Low Roof.........................

10.1

7.7

6.3

Mid Roof.........................

10.1

7.7

6.8

High Roof........................

11.4

8.4

7.0

Fuel Consumption Standards (gallons per 1000 ton-miles) Effective for

Model Years 2013 to 2016

Low Roof.........................

10.2

7.8

6.4

Mid Roof.........................

10.2

7.8

6.9

High Roof........................

11.6

8.5

7.2

14. On page 74445, correct Table 5 by revising it to read as follows:

Table 5--Heavy-Duty Engine Standards

Fuel Consumption Standards (gallons per 100 bhp-hr)

Regulatory subcategory

Light heavy-duty

Medium heavy-duty compression-ignition compression-

engine ignition engine.

Heavy heavy-duty compression-ignition Spark-ignition.... engine

engines...........

Truck Application............... Vocational........ Vocational........ Tractor........... Vocational........ Tractor........... All.

Effective Model Years...........

2017 and later

2016 and later.

Fuel Consumption Standard....... 5.66.............. 5.66.............. 4.78.............. 5.45.............. 4.52.............. 7.06.

Fuel Consumption Standards for Voluntary Compliance (gallons per 100 bhp-hr)

Regulatory subcategory

Light heavy-duty

Medium heavy-duty diesel engine diesel engine.

Heavy heavy-duty diesel engine

Spark-ignition.... engine............

Truck Application............... Vocational........ Vocational........ Tractor........... Vocational........ Tractor........... All.

Effective Model Years...........

2013 through 2016

2013 through 2015.

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Voluntary Fuel Consumption

5.89.............. 5.89.............. 4.93.............. 5.57.............. 4.67.............. 7.06.

Standard.

Issued: December 20, 2010.

Joseph S. Carra,

Acting Associate Administrator for Rulemaking, National Highway Traffic

Safety Administration, Department of Transportation.

Issued: December 20, 2010.

Margo Tsirigotis Oge,

Director, Office of Transportation Air Quality, Environmental

Protection Agency.

FR Doc. 2010-32726 Filed 12-28-10; 8:45 am

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