Federal Register / Vol. 75, No. 130 / Thursday, July 8, 2010 / Notices 39251 

1See ‘‘Certification Procedure for Light-Duty and 

Heavy-Duty Diesel Vehicles and Heavy-Duty Diesel 

Engines Using Selective Catalyst Reduction (SCR) 

Technologies’’ dated March 27, 2007 and the 

‘‘Revised Guidance for Certification of Heavy-Duty 

Diesel Engines Using Selective Catalyst Reduction 

(SCR) Technologies’’ dated December 30, 2009. 

2See 74 FR 57671 (November 9, 2009). 

for a Federal agency. This includes the 

time needed to review instructions; 

develop, acquire, install, and utilize 

technology and systems for the purposes 

of collecting, validating, and verifying 

information, processing and 

maintaining information, and disclosing 

and providing information; adjust the 

existing ways to comply with any 

previously applicable instructions and 

requirements which have subsequently 

changed; train personnel to be able to 

respond to a collection of information; 

search data sources; complete and 

review the collection of information; 

and transmit or otherwise disclose the 

information. 

Respondents/Affected Entities: These 

data and information are collected by 

State, local, and Tribal air quality 

management agencies. 

Estimated Number of Respondents: 

211. 

Frequency of Response: Annual. 

Estimated Total Annual Hour Burden: 

70. 

Estimated Total Annual Cost: $4,582 

in labor costs. 

Dated: July 1, 2010. 

John Moses, 

Director, Collection Strategies Division. 

[FR Doc. 2010–16694 Filed 7–7–10; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[FRL–9173–5] 

Control of Air Pollution From New 

Motor Vehicles: Announcement of 

Public Workshop for Heavy-Duty 

Diesel Engines Employing Selective 

Catalyst Reduction Technology 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Notice of Public Workshop and 

Opportunity for Comment. 

SUMMARY: A public workshop is being 

held to discuss the operation of heavyduty engines equipped with selective 

catalyst reduction (SCR). EPA will be 

reviewing its policies regarding the 

operation of SCR-equipped heavy-duty 

diesel engines without diesel exhaust 

fluid (DEF), with improper DEF, or 

when tampering (or some other defect in 

the SCR system) is detected. 

DATES: The workshop will be held on 

July 20, 2010 from 10 a.m. to 4 p.m. 

(PST) at the California Air Resources 

Board, Annex 4 Auditorium, 9528 

Telstar Avenue, El Monte, California 

91731, and will be conducted with the 

California Air Resources Board. Parties 

wishing to present information at the 

workshop are encouraged to notify Ms. 

Khesha Reed at the address noted 

below. 

Any party may also submit written 

comments either before or after the 

workshop. All comments are due by 

August 20, 2010. 

ADDRESSES: EPA will make available for 

public inspection materials submitted 

by any party at the public workshop and 

any other written comments submitted 

to the Agency. Materials relevant to this 

proceeding are contained in the Air and 

Radiation Docket and Information 

Center, maintained in Docket No. EPA– 

HQ–OAR–2010–0444. The docket is 

located at the Air Docket, Room 3334, 

1301 Constitution Avenue, NW., 

Washington, DC 20460, and may be 

viewed between 8 a.m., and 5:30 p.m., 

Monday through Friday. The telephone 

is (202) 566–1742. A reasonable fee may 

be charged by EPA for copying docket 

material. 

Additionally, an electronic version of 

the public docket is available through 

the Federal government’s electronic 

public docket and comment system. 

You may access EPA dockets at http:// 

www.regulations.gov. After opening the 

http://www.regulations.gov Web site, 

enter EPA–HQ–OAR–2010–0444 in 

‘‘Search Documents’’ to view documents 

in the record. Although a part of the 

official docket, the public docket does 

not include Confidential Business 

Information (CBI) or other information 

whose disclosure is restricted by statute. 

FOR FURTHER INFORMATION CONTACT: 

Khesha Reed, Compliance and 

Innovative Strategies Division (6405J), 

U.S. Environmental Protection Agency, 

1200 Pennsylvania Ave, NW., 

Washington, DC 20460. E-mail address: 

reed.khesha@epa.gov. 

SUPPLEMENTARY INFORMATION: 

I. Background: Several heavy duty 

diesel engine manufacturers have 

recently begun utilizing a NOX emission 

control technology called selective 

catalyst reduction (SCR) to meet EPA 

standards and other requirements. SCR 

is an established technology that has 

been shown to meet stringent emissions 

requirements while enabling fuel 

efficiency benefits. 

Currently certified heavy-duty 

engines utilizing SCR use a nitrogen 

containing reducing agent (aqueous 

urea) injected into the exhaust gas 

upstream of the catalyst. Other types of 

reducing agents may also be used by 

SCR technology. The reducing agent 

needs to be replenished periodically. 

Without the reducing agent, the 

efficiency of the SCR catalyst drops to 

zero and NOX emissions can potentially 

increase substantially. The efficiency of 

the SCR system can also be affected by 

the use of improper reducing agent or 

tampering with the SCR system. 

The need to replenish the reducing 

agent (hereafter called diesel exhaust 

fluid, or DEF, although the reducing 

agent need not be fluid) and the 

possibility that SCR technology could be 

rendered ineffective by operation on an 

empty DEF tank are addressed by EPA’s 

existing regulations regarding allowable 

and necessary maintenance and 

adjustable parameters. These regulations 

also apply in the case where inadequate 

DEF could be used or where the SCR 

system may be subject to tampering. 

Certified engine configurations include 

provisions and inducements designed to 

address these regulatory concerns. 

EPA has previously provided 

guidance to heavy-duty diesel engine 

manufacturers in March 2007 and 

December 2009 to facilitate 

manufacturer planning in advance of 

certification.1 In addition, in November 

2009 EPA published in the Federal 

Register the approval of specific 

maintenance intervals for DEF refills for 

certain manufacturers.2

II. Public Workshop: EPA is 

commencing a public process designed 

to provide a thorough review of EPA’s 

policies regarding the operation of SCRequipped heavy-duty diesel engines 

without DEF, with improper DEF, or 

when tampering (or some other defect in 

the SCR system) is detected for future 

2011 and later model year engines, in 

order to ensure, among other things, that 

SCR-equipped engines are designed to 

properly control emissions as required 

under applicable law and regulations. 

Although EPA has previously provided 

guidance to manufactures regarding the 

initial introduction and certification of 

SCR-equipped heavy-duty diesel 

engines, consistent with past practice 

we believe it is appropriate for EPA to 

review and reexamine its policies as 

technologies are introduced into the 

market place. As part of this process, 

EPA intends to review any information 

that has become available to determine 

whether its policies regarding SCRequipped engines should be revised. 

The scope of the review includes review 

of the ‘‘Revised Guidance for 

Certification of Heavy-Duty Diesel 

Engines Using Selective Catalyst 

Reduction (SCR) Technologies’’ dated 

December 30, 2009. As part of EPA’s 


srobinson on DSKHWCL6B1PROD with NOTICES
39252 Federal Register / Vol. 75, No. 130 / Thursday, July 8, 2010 / Notices 

review we will take into consideration 

the use of other reductants, in addition 

to current aqueous urea DEF, and will 

reexamine requisite infrastructure 

needs, any issues regarding the emission 

of unregulated pollutants, and any 

potential safety concerns. EPA is 

conducting the workshop with the 

California Air Resources Board in order 

that all relevant information be timely 

shared and considered by all affected 

parties; however, any final policies 

reached by EPA will be independently 

made and based upon applicable federal 

law and regulations. Any 

representations made by the California 

Air Resources Board regarding this 

matter are not binding upon EPA. 

Procedures for Public Participation: 

Submit your comments, identified by 

Docket ID No. EPA–HQ–OAR–2010– 

0444, by one of the following methods: 

• http://www.regulations.gov: Follow 

the on-line instructions for submitting 

comments. 

• E-mail: a-and-r-docket@epa.gov. 

• Fax: (202) 566–1741. 

• Mail: Air and Radiation Docket, 

Docket ID No. EPA–HQ–OAR–2010– 

0444, Environmental Protection Agency, 

Mailcode: 6102T, 1200 Pennsylvania 

Avenue, NW., Washington, DC 20460. 

Please include a total of two copies. 

• Hand Delivery: EPA Docket Center, 

Public Reading Room, EPA West 

Building, Room 3334, 1301 Constitution 

Avenue, NW., Washington, DC 20460. 

Such deliveries are only accepted 

during the Docket’s normal hours of 

operation, and special arrangements 

should be made for deliveries of boxed 

information. 

• Instructions: Direct your comments 

to Docket ID No. EPA–HQ–OAR–2010– 

0444. EPA’s policy is that all comments 

received will be included in the public 

docket without change and may be 

made available online at http:// 

www.regulations.gov, including any 

personal information provided, unless 

the comment includes information 

claimed to be Confidential Business 

Information (CBI) or other information 

whose disclosure is restricted by statute. 

Do not submit information that you 

consider to be CBI or otherwise 

protected through http:// 

www.regulations.gov or e-mail. The 

http://www.regulations.gov Web site is 

an ‘‘anonymous access’’ system, which 

means EPA will not know your identity 

or contact information unless you 

provide it in the body of your comment. 

If you send an e-mail comment directly 

to EPA without going through http:// 

www.regulations.gov, your e-mail 

address will be automatically captured 

and included as part of the comment 

that is placed in the public docket and 

made available on the Internet. If you 

submit an electronic comment, EPA 

recommends that you include your 

name and other contact information in 

the body of your comment and with any 

disk or CD–ROM you submit. If EPA 

cannot read your comment due to 

technical difficulties and cannot contact 

you for clarification, EPA may not be 

able to consider your comment. 

Electronic files should avoid the use of 

special characters, any form of 

encryption, and be free of any defects or 

viruses. For additional information 

about EPA’s public docket visit the EPA 

Docket Center homepage at http:// 

www.epa.gov/epahome/dockets.htm. 

Persons with comments containing 

proprietary information must 

distinguish such information from other 

comments to the greatest possible extent 

and label it as ‘‘Confidential Business 

Information’’ (CBI). If a person making 

comments wants EPA to base its 

decision in part on a submission labeled 

as CBI, then a non-confidential version 

of the document that summarizes the 

key data or information should be 

submitted for the public docket. To 

ensure that proprietary information is 

not inadvertently placed in the docket, 

submissions containing such 

information should be sent directly to 

the contact person listed above and not 

to the public docket. Information 

covered by a claim of confidentiality 

will be disclosed by EPA only to the 

extent allowed and by the procedures 

set forth in 40 CFR Part 2. If no claim 

of confidentiality accompanies the 

submission when EPA receives it, EPA 

will make it available to the public 

without further notice to the person 

making comments. 

Dated: July 1, 2010. 

Margo Tsirigotis Oge, 

Director, Office of Transportation and Air 

Quality. 

[FR Doc. 2010–16702 Filed 7–7–10; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[EPA–HQ–OAR–2007–0492; FRL–9171–8] 

Release of Final Documents Related to 

the Review of the National Ambient Air 

Quality Standards for Particulate 

Matter 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Notice of Availability. 

SUMMARY: The Office of Air Quality 

Planning and Standards (OAQPS) of 

EPA is announcing the availability of 

two final documents titled, Quantitative 

Health Risk Assessment for Particulate 

Matter and Particulate Matter UrbanFocused Visibility Assessment. These 

two documents describe the quantitative 

analyses that have been conducted as 

part of the review of the national 

ambient air quality standards (NAAQS) 

for particulate matter (PM). 

DATES: These documents will be 

available on or about June 30, 2010. 

ADDRESSES: The documents will be 

available primarily via the Internet at 

the following Web site: http:// 

www.epa.gov/ttn/naaqs/standards/pm/ 

s_pm_2007_risk.html. 

FOR FURTHER INFORMATION CONTACT: For 

questions related to the final document 

titled, Quantitative Health Risk 

Assessment for Particulate Matter, 

please contact Dr. Zachary Pekar, Office 

of Air Quality Planning and Standards 

(Mail code C504–06), U.S. 

Environmental Protection Agency, 

Research Triangle Park, NC 27711; email: pekar.zachary@epa.gov; 

telephone: 919–541–3704; fax: 919– 

541–0237. 

For questions related to the final 

document titled, Particulate Matter 

Urban-Focused Visibility Assessment, 

please contact Ms. Vicki Sandiford, 

Office of Air Quality Planning and 

Standards (Mail code C504–06), U.S. 

Environmental Protection Agency, 

Research Triangle Park, NC 27711; email: sandiford,vicki@epa.gov; 

telephone: 919–541–2629; fax: 919– 

541–0237. 

SUPPLEMENTARY INFORMATION: Under 

section 108(a) of the Clean Air Act 

(CAA), the Administrator identifies and 

lists certain pollutants which ‘‘cause or 

contribute to air pollution which may 

reasonably be anticipated to endanger 

public health or welfare.’’ The EPA then 

issues air quality criteria for these listed 

pollutants, which are commonly 

referred to as ‘‘criteria pollutants.’’ The 

air quality criteria are to ‘‘accurately 

reflect the latest scientific knowledge 

useful in indicating the kind and extent 

of all identifiable effects on public 

health or welfare which may be 

expected from the presence of [a] 

pollutant in the ambient air, in varying 

quantities.’’ Under section 109 of the 

CAA, EPA establishes primary (healthbased) and secondary (welfare-based) 

NAAQS for pollutants for which air 

quality criteria are issued. Section 

109(d) of the CAA requires periodic 

review and, if appropriate, revision of 

existing air quality criteria. The revised 

air quality criteria reflect advances in 

scientific knowledge on the effects of 

the pollutant on public health or 

welfare. The EPA is also required to 


srobinson on DSKHWCL6B1PROD with NOTICES