79370 Federal Register / Vol. 75, No. 243 / Monday, December 20, 2010 / Notices 

1EPA previously approved EMFAC2007 for 

quantitative CO hot-spot analyses in California. 

Regulatory Innovations subcommittee 

will meet on Tuesday, January 11, 2011 

from 8:30 a.m. to 12 p.m. The Permits, 

New Source Reviews and Toxics 

subcommittee will meet on Tuesday, 

January 11, 2011 from approximately 

12:45 p.m. to 5 p.m. The meetings will 

also be held at the Crown Plaza at 

National Airport, in Arlington, Virginia. 

The agenda for the CAAAC full 

committee meeting on January 12, 2011 

will be posted on the Clean Air Act 

Advisory Committee Web site at http:// 

www.epa.gov/oar/caaac/. 

Inspection of Committee Documents: 

The Committee agenda and any 

documents prepared for the meeting 

will be publicly available at the 

meeting. Thereafter, these documents, 

together with CAAAC meeting minutes, 

will be available by contacting the 

Office of Air and Radiation Docket and 

requesting information under docket 

OAR–2004–0075. The Docket office can 

be reached by e-mail at: a-and-rDocket@epa.gov or FAX: 202–566–9744. 

FOR FURTHER INFORMATION CONTACT: 

Concerning the CAAAC, please contact 

Pat Childers, Office of Air and 

Radiation, U.S. EPA (202) 564–1082, 

FAX (202) 564–1352 or by mail at U.S. 

EPA, Office of Air and Radiation (Mail 

code 6102 A), 1200 Pennsylvania 

Avenue, NW., Washington, DC 20004. 

For information on the Subcommittees, 

please contact the following 

individuals: (1) Permits/NSR/Toxics— 

Liz Naess, (919) 541–1892; (2) Economic 

Incentives and Regulatory Innovations— 

Carey Fitzmaurice, (202) 564–1667; and 

(3) Mobile Source Technical Review— 

Liz Etchells, (202) 564–1372. Additional 

Information on these meetings, CAAAC, 

and its Subcommittees can be found on 

the CAAAC Web site: http:// 

www.epa.gov/oar/caaac/. 

For information on access or services 

for individuals with disabilities, please 

contact Mr. Pat Childers at (202) 564– 

1082 or childers.pat@epa.gov. To 

request accommodation of a disability, 

please contact Mr. Childers, preferably 

at least 10 days prior to the meeting, to 

give EPA as much time as possible to 

process your request. 

Dated: December 14, 2010. 

Pat Childers, 

Designated Federal Official, Clean Air Act 

Advisory Committee, Office of Air and 

Radiation. 

[FR Doc. 2010–31919 Filed 12–17–10; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[FRL–9241–3] 

Official Release of the MOVES2010a 

and EMFAC2007 Motor Vehicle 

Emissions Models for Transportation 

Conformity Hot-Spot Analyses and 

Availability of Modeling Guidance 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Notice of Availability. 

SUMMARY: This Notice announces the 

availability of two new EPA guidance 

documents for: completing quantitative 

particulate matter (PM2.5 and PM10) hotspot analyses using EPA’s Motor 

Vehicle Emissions Simulator model 

(MOVES), California’s EMission FACtor 

model (EMFAC), and other models, and 

completing project-level carbon 

monoxide (CO) analyses using MOVES. 

These guidance documents will assist 

practitioners with implementing 

MOVES, EMFAC, air quality models, 

and applicable requirements. 

EPA is approving the latest version of 

the MOVES model (MOVES2010a) for 

official use for quantitative CO, PM2.5,

and PM10 hot-spot analyses outside of 

California. This notice also announces a 

two-year grace period before the 

MOVES2010a emissions model is 

required to be used in quantitative CO 

and PM hot-spot analyses for projectlevel conformity determinations outside 

California. 

EPA is also approving the latest 

version of the EMFAC model 

(EMFAC2007) for quantitative PM hotspot analyses for transportation 

conformity purposes within California.1

This notice announces a two-year grace 

period before EMFAC2007 is required to 

be used for quantitative PM hot-spot 

analyses for project-level conformity 

determinations in California. While EPA 

is approving the MOVES2010a and 

EMFAC2007 models today for projectlevel transportation conformity 

purposes, this notice is applicable to 

current and future versions of the 

MOVES and EMFAC models, unless 

EPA notes otherwise when approving 

the models for conformity purposes. 

DATES: EPA’s approval of the 

MOVES2010a and EMFAC2007 

emissions models is effective December 

20, 2010. Today’s approval also starts a 

two-year transportation conformity 

grace period that ends on December 20, 

2012, after which: 

• MOVES2010a (outside of 

California) is required to be used for 

new quantitative CO, PM10, and PM2.5

hot-spot analyses for transportation 

conformity purposes; and 

• EMFAC2007 (within California) is 

required to be used for new PM10 and 

PM2.5 hot-spot analyses for 

transportation conformity purposes. 

These models can also be used during 

the grace period, as described further in 

this notice. 

FOR FURTHER INFORMATION CONTACT: For 

questions regarding the official release 

of MOVES2010a for quantitative CO, 

PM2.5, and PM10 hot-spot analyses, 

contact Meg Patulski at 

patulski.meg@epa.gov, (734) 214–4842, 

Transportation and Regional Programs 

Division, Office of Transportation and 

Air Quality, EPA, 2000 Traverwood 

Road, Ann Arbor, MI 48105. For 

questions regarding the official release 

of EMFAC2007 for quantitative PM2.5

and PM10 hot-spot analyses in 

California, contact Karina O’Connor at 

oconnor.karina@epa.gov, (775) 833– 

1276, Air Planning Office (AIR–2), Air 

Division, EPA, Region 9, 75 Hawthorne 

Street, San Francisco, CA, 94105–3901. 

Technical questions about completing 

emissions and air quality modeling for 

CO and PM hot-spot analyses can also 

be sent to conformity-hotspot@epa.gov. 

SUPPLEMENTARY INFORMATION: 

The contents of this notice are as 

follows: 

I. Background 

II. Using MOVES at the Project Level 

III. Using EMFAC at the Project Level 

IV. Availability of Modeling Guidance 

I. Background 

A. What is transportation conformity? 

Transportation conformity is a Clean 

Air Act (CAA) requirement to ensure 

that Federally supported highway and 

transit activities are consistent with 

(‘‘conform to’’) the State air quality 

implementation plan (SIP). Conformity 

to a SIP means that a transportation 

activity will not cause or contribute to 

new air quality violations, worsen 

existing violations, or delay timely 

attainment of the national ambient air 

quality standards (NAAQS) or any 

interim milestone. EPA’s transportation 

conformity regulations (40 CFR Parts 

51.390 and 93) describe how Federally 

funded and approved highway and 

transit projects meet these statutory 

requirements. 

B. Hot-Spot Analyses 

A hot-spot analysis in the context of 

transportation conformity is defined at 

40 CFR 93.101 as an estimation of likely 

future localized pollutant 

concentrations and a comparison of 

those concentrations to the relevant 


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2For more information on qualitative PM hot-spot 

analyses, see EPA and FHWA’s joint 

‘‘Transportation Conformity Guidance for 

Qualitative Hot-spot Analyses in PM2.5 and PM10

Nonattainment and Maintenance Areas’’ (EPA–420– 

B–06–902, March 2006). 

3See EPA’s March 2006 final conformity rule for 

further information (71 FR 12498–12502). 

4See the EPA document: ‘‘EPA Releases 

MOVES2010a Mobile Source Emissions Model 

Update: Questions and Answers’’ (EPA–420–F–10– 

050, August 2010) at: http://www.epa.gov/otaq/ 

models/moves/index.htm#generalinfo. 

5EPA has said that it is not considering 

MOVES2010a a new emissions model for SIPs and 

regional conformity analyses under 40 CFR 93.111. 

The MOVES2010 grace period for regional 

conformity analyses (which began on March 2, 

2010) applies to the use of MOVES2010a as well. 

6Also see the March 2, 2010 Federal Register 

notice (75 FR 9413–9414). 

7EPA may provide minor, periodic updates to the 

MOVES model in order to improve its functionality 

and performance. 

NAAQS. A hot-spot analysis assesses 

the air quality impacts on a scale 

smaller than an entire nonattainment or 

maintenance area, including, for 

example, congested highways or transit 

terminals. Such an analysis of the area 

substantially affected by the project is a 

means of demonstrating that statutory 

requirements are met for the relevant 

NAAQS in the project area. When a hotspot analysis is required, it is included 

within a project-level conformity 

determination. 

Sections 93.116 and 93.123 of the 

conformity rule contain the 

requirements for when a CO, PM10, or 

PM2.5 hot-spot analysis is required for a 

project-level conformity determination. 

In CO nonattainment and maintenance 

areas, a hot-spot analysis is required for 

all Federal non-exempt projects, with 

quantitative hot-spot analyses being 

required for congested and high volume 

intersections and other projects (40 CFR 

93.123(a)(1)). 

The conformity rule requires a hotspot analysis for only a subset of all 

Federal non-exempt highway and transit 

projects in PM nonattainment and 

maintenance areas (40 CFR 

93.123(b)(1)), such as new or expanded 

highway or transit projects with 

significant increases in diesel traffic. 

However, unlike CO hot-spot analyses, 

to date only qualitative PM hot-spot 

analyses have been required.2 Section 

93.123(b) states that the requirement to 

conduct quantitative analyses for PM 

does not take effect until EPA releases 

modeling guidance on the subject and 

announces in the Federal Register that 

these requirements are in effect. 

Today’s notice announces the 

availability of such final modeling 

guidance: ‘‘Transportation Conformity 

Guidance for Quantitative Hot-Spot 

Analyses in PM2.5 and PM10

Nonattainment and Maintenance Areas’’ 

(EPA–420–B–10–040). This guidance 

describes conformity requirements for 

quantitative PM hot-spot analyses; 

provides technical guidance on 

estimating project emissions using 

EPA’s MOVES model, California’s 

EMFAC model, and other methods; 

outlines how to apply air quality 

dispersion models for quantitative PM 

hot-spot analyses; and includes other 

resources and examples to assist in 

conducting quantitative PM hot-spot 

modeling analyses. EPA has coordinated 

with the Department of Transportation 

(DOT) in developing this final guidance. 

In addition, EPA stated in the 

preamble to the March 10, 2006 final 

conformity rule that finalizing the 

MOVES emissions model was critical 

before quantitative PM hot-spot analyses 

could be required, due to the limitations 

of applying MOBILE6.2 for PM at the 

project level.3 With today’s notice 

approving MOVES2010a and 

EMFAC2007 for quantitative PM hotspot analyses (see Sections II and III) 

and the release of associated modeling 

guidance (see Section IV.A), the 

requirement to conduct quantitative PM 

hot-spot analyses as required by 40 CFR 

93.123(b)(4) is now in effect, subject to 

the conformity grace period for using 

new emissions models for such 

analyses. 

C. Latest Emissions Models and HotSpot Analyses 

CAA section 176(c)(1) states that 

‘‘* * * [t]he determination of 

conformity shall be based on the most 

recent estimates of emissions, and such 

estimates shall be determined from the 

most recent population, employment, 

travel, and congestion estimates. * * *’’ 

The transportation conformity rule (40 

CFR 93.111) requires that conformity 

analyses be based on the latest motor 

vehicle emissions model approved by 

EPA. 

The conformity rule states that EPA 

will consult with the DOT to establish 

a grace period following the 

specification of any new emissions 

model. The rule further provides for a 

grace period for new emissions models 

of between 3–24 months, to be 

established by notification in the 

Federal Register (40 CFR 93.111(b)). 

In consultation with DOT, EPA must 

consider various factors when 

establishing a grace period for 

conformity determinations, including 

the degree of change in emissions 

models and the effects of the new model 

on the transportation planning process 

(40 CFR 93.111(b)(2)). 

The conformity rule provides some 

flexibility for hot-spot analyses that are 

started before the end of a grace period. 

A conformity determination for a 

transportation project may be based on 

a previous model if the analysis was 

begun before or during the grace period, 

and if the final environmental document 

for the project is issued no more than 

three years after the issuance of the draft 

environmental document (40 CFR 

93.111(c)). 

II. Using MOVES at the Project Level 

A. What is MOVES? 

MOVES is EPA’s state-of-the-art, 

upgraded model for estimating 

emissions from cars, trucks, 

motorcycles, and buses. MOVES is 

based on an analysis of millions of 

emission test results and considerable 

advances in the Agency’s understanding 

of vehicle emissions. EPA released 

MOVES2010 in December 2009, and 

then released minor updates to the 

model in the MOVES2010a version in 

August 2010.4

On March 2, 2010, EPA approved the 

use of MOVES2010 in official SIP 

submissions to EPA and for certain 

transportation conformity analyses 

outside of California (75 FR 9411). The 

March 2010 approval also applies to the 

MOVES2010a version for SIPs and 

regional conformity analyses.5 However, 

until today, EPA has not approved any 

version of MOVES for project-level CO 

and PM analyses, since project-level 

MOVES guidance documents were not 

yet available.6

B. Using MOVES2010a for Quantitative 

CO, PM2.5 and PM10 Hot-Spot Analyses 

In today’s notice, EPA is approving 

MOVES2010a as EPA’s official motor 

vehicle emissions factor model for 

project-level CO and PM analyses 

outside of California. EPA is also 

establishing a two-year grace period for 

using MOVES2010a for quantitative CO 

and PM hot-spot analyses for projectlevel conformity determinations, as 

described further below. This 

conformity grace period begins today 

and ends December 20, 2012. Future 

updates to the MOVES2010a model will 

not start a new conformity grace period 

for quantitative CO and PM hot-spot 

analyses unless EPA notes otherwise.7

In deciding the length of the 

MOVES2010a conformity grace period, 

EPA consulted with DOT and 

considered the degree of change in the 

model and the scope of re-planning 

likely to be necessary for project 

development, pursuant to 40 CFR 

93.111(b). EPA understands that 


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8For example, Section 2.9 of the final 

quantitative PM hot-spot guidance describes the 

different roles and responsibilities for Federal, 

State, and local agencies for these analyses. 

9See Questions 10 and 13 in EPA’s ‘‘Policy 

Guidance on the Use of MOVES2010 for State 

Implementation Plan Development, and Other 

Purposes,’’ (EPA–420–B–09–046, December 2009) 

at: http://www.epa.gov/otaq/models/moves/ 

420b09046.pdf. Areas outside of California should 

refer to Section III on using EMFAC for PM hot-spot 

analyses. 

10Since previous emissions models have not been 

approved in the past for quantitative PM hot-spot 

analyses, a qualitative PM analysis is considered 

‘‘the previous version of the model’’ for the purposes 

of 40 CFR 93.111(c). 

11See EPA’s March 2006 final rule for further 

information (71 FR 12498–12502). 

numerous areas will be required to 

conduct quantitative hot-spot analyses 

using MOVES, and sufficient time must 

be allowed for State and local agencies 

to obtain the necessary training and 

otherwise prepare to use MOVES for 

these analyses. The following 

paragraphs elaborate further on the 

factors that were considered in 

establishing the maximum two-year 

conformity grace period for hot-spot 

analyses with MOVES. 

First, EPA considered the time it will 

take State and local transportation and 

air quality agencies to conduct and 

provide technical support for 

quantitative hot-spot analyses. As 

described in EPA’s new modeling 

guidance documents (see Section IV), 

there are several steps involved in a 

quantitative PM hot-spot analysis and 

for applying MOVES for CO hot-spot 

analyses, and a significant amount of 

instruction will be necessary for these 

agencies to understand the context for 

applying MOVES for these analyses. 

Second, State and local agencies will 

need to become familiar with the 

MOVES emissions model. Agencies 

need to understand how to configure 

and run MOVES at the project level for 

a variety of different types of projects. 

The MOVES generation of models is not 

merely an upgrade of the previous 

MOBILE model using more recent 

emissions data; it involves brand-new 

software, designed from the ground up 

to estimate emissions at a more detailed 

level. MOVES output will also need to 

be prepared for use in recommended air 

quality models. This will require many 

project sponsors to obtain training in the 

use of these air quality models, which 

are being applied for the first time for 

localized PM analyses of transportation 

projects. 

EPA will work with DOT to develop 

and provide training to address these 

concerns, including: 

• General and detailed overviews of 

the project-level guidance documents 

described in Section IV of this notice. 

• Technical training for applying 

MOVES at the project level consistent 

with the guidance documents being 

released today. 

• Technical training for using 

recommended air quality models in 

accordance with EPA’s guidance and 

regulations. 

All of these courses are anticipated to be 

provided in the form of webinars, other 

Web-based courses, conference 

seminars, or in-person training. Courses 

will be developed to address different 

levels of State and local expertise as 

well as different roles and 

responsibilities for agencies involved.8

EPA and DOT intend to maximize 

training opportunities given available 

resources and allow sufficient time so 

that State and local agencies become 

trained. Following training, additional 

time will also be needed to gain 

experience applying guidance and 

models for real-world situations. 

EPA also considered the need to 

collect and prepare data required to run 

MOVES at the project level. To take 

advantage of the full modeling 

capabilities of MOVES, those 

conducting hot-spot analyses will 

generally need to be collecting or 

generating data specific to individual 

projects, and some project-level data 

may not readily be available. Also, the 

data will need to be entered on the basis 

of individual ‘‘links’’ to capture vehicle 

activity occurring on a specific project. 

Finally, EPA considered the general 

time and monetary resource constraints 

in which State and local agencies 

currently operate. These agencies need 

to participate in EPA and DOT training 

and possibly provide training to other 

individuals in their offices. Many 

agencies will be implementing the 

transition to PM and CO hot-spot 

analyses with MOVES for projects in 

several nonattainment and maintenance 

areas, with each analysis involving 

multiple State and local agencies. 

C. Implementation of the Conformity 

Grace Period 

EPA has previously described how 

the conformity grace period for CO and 

PM hot-spot analyses will be 

implemented in the policy guidance for 

applying MOVES2010a for these 

purposes.9 For CO hot-spot analyses 

outside California that are started during 

the two-year grace period, project 

sponsors can choose to use either 

MOBILE6.2 or MOVES2010a. EPA 

encourages sponsors to use the 

interagency consultation process to 

determine which option may be most 

appropriate for a given situation. Any 

new quantitative CO hot-spot analyses 

for conformity purposes begun after the 

end of the grace period must use 

MOVES2010a. 

For PM hot-spot analyses, project 

sponsors can continue to conduct 

qualitative PM hot-spot analyses for 

analyses that are started during the 

grace period (40 CFR 93.111(c)).10

Quantitative PM hot-spot analyses can 

also be completed for conformity 

purposes during the grace period, if 

desired. However, any quantitative PM 

hot-spot analyses conducted during the 

grace period must use MOVES2010a, 

since MOBILE6.2 does not have the 

capabilities to produce viable results for 

project-level PM emissions analyses and 

is therefore not appropriate for this 

purpose.11 Any quantitative PM hotspot analysis for conformity purposes 

begun after the end of the grace period 

must use MOVES2010a. The 

interagency consultation process should 

be used if it is unclear if a previous 

analysis was begun before the end of the 

grace period. If you have questions 

about which model should be used in 

your conformity determination, you can 

also consult with your EPA Regional 

Office. 

D. Availability of MOVES2010a and 

Support Materials 

Copies of the official version of the 

MOVES2010a model, along with user 

guides and supporting documentation, 

are available on EPA’s MOVES Web site: 

http://www.epa.gov/otaq/models/ 

moves/index.htm. 

Guidance on how to apply the 

MOVES model for transportation 

conformity purposes can be found on 

EPA’s transportation conformity Web 

site at: http://www.epa.gov/otaq/ 

stateresources/transconf/policy.htm. 

EPA will continue to update this Web 

site as other MOVES support materials 

and guidance are developed. See 

Section IV for further information on the 

availability of new guidance about using 

MOVES to estimate project-level 

emissions. This guidance applies for 

MOVES2010a and future versions of the 

MOVES model unless EPA notes 

otherwise. 

Individuals who wish to receive EPA 

announcements related to the MOVES 

model can subscribe to the EPA– 

MOBILENEWS e-mail listserver. For 

more information about subscribing to 

the EPA–MOBILENEWS listserver, visit 

EPA’s Web site at http://www.epa.gov/ 

otaq/models/mobilelist.htm. 


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12See Section II.C of the January 2008 notice for 

further information (73 FR 3466). 

13See Question 15 in EPA’s ‘‘Policy Guidance on 

the Use of MOVES2010 for State Implementation 

Plan Development, and Other Purposes,’’ (EPA– 

420–B–09–046, December 2009) at: http:// 

www.epa.gov/otaq/models/moves/420b09046.pdf. 

14Since previous emissions models have not been 

approved in the past for quantitative PM hot-spot 

analyses, a qualitative PM analysis is considered 

‘‘the previous version of the model’’ for the purposes 

of 40 CFR 93.111(c). 

III. Using EMFAC at the Project Level 

A. What is EMFAC? 

The EMFAC model is a computer 

model developed by the California Air 

Resources Board (CARB) to estimate 

emission rates for on-road mobile 

sources operating in California for 

calendar years 1970 to 2040. The latest 

version of this model is EMFAC2007, 

and EPA approved this version of the 

model for SIP development in California 

and for most transportation conformity 

analyses (i.e., all regional emissions 

analyses and CO hot-spot analyses) on 

January 18, 2008 (73 FR 3464). 

However, EMFAC2007 was not 

approved for quantitative PM2.5 and 

PM10 hot-spot analyses at that time. 

As stated in the January 2008 notice, 

EPA believed that modeling guidance 

would be necessary before quantitative 

PM hot-spot analyses could be 

required.12 With the release of EPA’s 

PM hot-spot guidance, we can approve 

EMFAC2007 for quantitative PM hotspot analyses. 

B. Using EMFAC2007 for Quantitative 

PM2.5 and PM10 Hot-Spot Analyses 

Today’s notice approves EMFAC2007 

for project-level PM2.5 and PM10

analyses in California. This notice also 

establishes a two-year grace period for 

using EMFAC2007 for quantitative PM 

hot-spot analyses for project-level 

conformity determinations. This grace 

period begins today and ends December 

20, 2012. Future updates to the 

EMFAC2007 model will not start a new 

conformity grace period for quantitative 

PM hot-spot analyses unless EPA notes 

otherwise. 

EPA consulted with DOT on the 

appropriate length of the conformity 

grace period for EMFAC2007 and 

considered the start-up factors described 

in 40 CFR 93.111(b). EPA considered 

how many PM areas are affected by this 

transition to quantitative PM hot-spot 

analyses and that sufficient time must 

be allowed for State and local agencies 

for all areas subject to this new 

requirement to obtain the necessary 

training and planning to apply EMFAC 

in California. More details on the factors 

considered are included below, and 

many are similar to those discussed in 

Section II for establishing the MOVES 

grace period. 

EPA considered the time it will take 

State and local agencies in California to 

conduct and provide technical support 

for quantitative PM hot-spot analyses. 

These agencies will also need to become 

familiar with applying EMFAC2007 at 

the project level for PM, since the model 

is currently not applied in the ‘‘projectlevel mode’’ when developing 

inventories for PM SIPs or regional 

conformity analyses. These agencies 

will also need to learn how to prepare 

EMFAC outputs for recommended air 

quality models that are currently not 

used for transportation projects. 

As described in Section II.B, EPA is 

working with DOT to develop and 

provide new training courses on EPA’s 

quantitative PM hot-spot guidance, as 

well as technical training for air quality 

modeling. EPA and DOT will be 

working with California agencies on 

State and local agency training for using 

EMFAC for quantitative PM hot-spot 

analyses. Training opportunities will be 

based on available resources and 

consider budgetary and other 

constraints. 

In addition to training needs, EPA 

also considered the data collection and 

preparation for using EMFAC for 

quantitative PM hot-spot analyses. For 

example, project sponsors will need to 

obtain project-specific fleet data (as 

opposed to using EMFAC fleet data for 

regional inventories). EMFAC contains 

fleet data for each nonattainment and 

maintenance area in California which 

are used in the model as ‘‘defaults’’ for 

fleet characteristics used in SIPs and 

regional conformity analyses. However, 

these defaults will not be appropriate 

for use as-is in PM hot-spot analyses; 

project sponsors will need to make 

additional effort to obtain fleet 

information for the specific project area 

covered by the PM hot-spot analysis. 

Finally, as with the transition to using 

MOVES, EPA considered the time 

required for individuals to participate in 

future training courses, the time to learn 

to apply the guidance and models after 

training, and other constraints affecting 

California agencies. For example, State 

agencies will be charged with preparing 

and supporting quantitative PM hot-spot 

analyses for many projects across the 

State, which has eleven PM10 and seven 

PM2.5 metropolitan nonattainment and 

maintenance areas, as well as isolated 

rural PM areas. 

C. Implementation of the Conformity 

Grace Period 

EPA has previously described how 

the conformity grace period for PM hotspot analyses will be implemented.13

For PM hot-spot analyses, project 

sponsors can continue to conduct 

qualitative PM hot-spot analyses for 

analyses that are started during the 

grace period (40 CFR 93.111(c)).14

Quantitative PM hot-spot analyses can 

also be completed for conformity 

purposes during the grace period, if 

desired. However, any quantitative PM 

hot-spot analyses conducted for 

conformity purposes during the grace 

period, or begun after the end of the 

grace period, must use EMFAC2007. 

The interagency consultation process 

should be used if it is unclear if a 

previous analysis was begun before the 

end of the grace period. If you have 

questions, you can consult the EPA 

Region 9 person listed in For Further 

Information Contact, above. 

D. Availability of EMFAC and Support 

Materials 

Copies of the official version of the 

EMFAC2007 model are available on 

CARB’s Web site: http:// 

www.arb.ca.gov/msei/onroad/ 

latest_version.htm. This Web site also 

contains technical support 

documentation for the development of 

EMFAC2007 as well as other related 

documents. 

Policy guidance on how to apply the 

EMFAC model for transportation 

conformity purposes can be found on 

EPA’s transportation conformity Web 

site at: http://www.epa.gov/otaq/ 

stateresources/transconf/policy.htm. 

See Section IV.A for further information 

on the availability of new guidance 

which articulates how to estimate PM 

project-level emissions using EMFAC. 

This guidance applies for EMFAC2007 

and future versions of the EMFAC 

model unless EPA notes otherwise. 

IV. Availability of Modeling Guidance 

A. Guidance for Quantitative PM HotSpot Analyses 

Today’s notice also announces the 

availability of the final guidance 

document: ‘‘Transportation Conformity 

Guidance for Quantitative Hot-Spot 

Analyses in PM2.5 and PM10

Nonattainment and Maintenance Areas’’ 

(EPA–420–B–10–040). This guidance, a 

fact sheet, and other documentation are 

available online at the EPA Web site: 

http:/www.epa.gov/otaq/stateresources/ 

transconf/policy.htm. As described in 

Sections II and III, EPA and DOT will 

provide outreach and training for using 

this guidance. 

This guidance describes conformity 

requirements for quantitative PM hotspot analyses; provides technical 


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15EPA stated in the March 2006 final rule that the 

PM hot-spot modeling guidance would ‘‘consider 

how projects of air quality concern are predicted to 

impact air quality at existing and potential PM2.5

monitor locations which are appropriate to allow 

the comparison of predicted PM2.5 concentrations to 

the current PM2.5 standards, based on PM2.5 monitor 

siting requirements (40 CFR Part 58).’’ (71 FR 12471) 

guidance on estimating project 

emissions using EPA’s MOVES model, 

California’s EMFAC model, and other 

methods; and outlines how to apply air 

quality dispersion models for 

quantitative PM hot-spot analyses. The 

guidance also discusses how to 

calculate design values for comparison 

to each PM NAAQS, as well as how to 

determine which air quality modeling 

receptors may or may not be appropriate 

for PM hot-spot analyses.15 The 

guidance also describes how the 

interagency consultation process should 

be used to develop quantitative hot-spot 

analyses in PM nonattainment and 

maintenance areas. In addition, the 

guidance includes other resources and 

examples to assist in conducting 

quantitative PM hot-spot modeling 

analyses. However, the guidance does 

not change transportation conformity 

rule requirements for PM hot-spot 

analyses, such as what types of projects 

are subject to these analyses. EPA notes 

that this guidance helps implement 

existing CAA and transportation 

conformity requirements and is not a 

regulation. In addition, certain sections 

of this guidance may be applicable 

when completing air quality analyses 

for transportation projects for purposes 

other than transportation conformity. 

EPA has coordinated with the DOT in 

developing this final guidance. 

A draft of this guidance was made 

available for public comment on May 

26, 2010, with a closing date of July 19, 

2010 (75 FR 29537–29538). EPA 

received 15 sets of comments on the 

draft guidance and considered these 

comments when developing the final 

document. 

As discussed in Section I, the 

conformity rule requires EPA to release 

guidance on how to conduct 

quantitative PM hot-spot analyses prior 

to announcing that the requirement to 

conduct such analyses is in effect (40 

CFR 93.123(b)(4)). This regulatory 

requirement is met with today’s release 

of this final quantitative PM hot-spot 

modeling guidance, as described in this 

notice. The qualitative PM hot-spot 

requirements under 40 CFR 93.123(b)(2) 

will no longer apply in any PM2.5 and 

PM10 nonattainment and maintenance 

areas once the grace period is over and 

quantitative requirements are in effect. 

At that time, the 2006 EPA/FHWA 

qualitative PM hot-spot guidance will be 

superseded by EPA’s quantitative PM 

hot-spot guidance for these analyses. 

B. Guidance for Using MOVES in 

Project-Level CO Analyses 

EPA is also releasing today the final 

guidance document: ‘‘Using MOVES in 

Project-Level Carbon Monoxide 

Analyses’’ (EPA–420–B–10–041). The 

purpose of this guidance is to describe 

how to use MOVES to estimate CO 

emissions from highway and transit 

projects in States other than California. 

This guidance is available online at the 

EPA Web site: http://www.epa.gov/otaq/ 

stateresources/transconf/policy.htm. 

EPA coordinated with DOT in 

developing this guidance. 

This guidance can be applied when 

using MOVES to complete any 

quantitative CO project-level analysis, 

including: CO hot-spot analyses for 

transportation conformity 

determinations, localized SIP modeling, 

and CO project-level analyses 

completed pursuant to the National 

Environmental Policy Act. EPA and 

DOT will provide outreach and training 

for using this guidance. 

Dated: December 14, 2010. 

Margo Tsirigotis Oge, 

Director, Office of Transportation and Air 

Quality. 

[FR Doc. 2010–31909 Filed 12–17–10; 8:45 am] 

BILLING CODE 6560–50–P 

ENVIRONMENTAL PROTECTION 

AGENCY 

[FRL–9241–2] 

Notice of a Regional Project Waiver of 

Section 1605 (Buy American) of the 

American Recovery and Reinvestment 

Act of 2009 (ARRA) to the Woodlake 

Tax District in Woodbury, CT 

AGENCY: Environmental Protection 

Agency (EPA). 

ACTION: Notice. 

SUMMARY: The EPA is hereby granting a 

waiver of the Buy American 

requirements of ARRA Section 1605 

under the authority of Section 

1605(b)(2) [manufactured goods are not 

produced in the United States in 

sufficient and reasonably available 

quantities and of a satisfactory quality] 

to the Woodlake Tax District (‘‘District’’) 

in Woodbury, Connecticut for the 

purchase of a submersible well pump as 

part of the construction of a new 

bedrock well field and raw water 

transmission line. This is a project 

specific waiver and only applies to the 

use of the specified product for the 

ARRA project being proposed. Any 

other ARRA recipient that wishes to use 

the same product must apply for a 

separate waiver based on project 

specific circumstances. Based upon 

information submitted by the District 

and its consulting engineer, it has been 

determined that there are currently no 

domestically manufactured submersible 

well pumps available to meet its 

proposed project specifications. The 

Regional Administrator is making this 

determination based on the review and 

recommendations of the Municipal 

Assistance Unit. The Assistant 

Administrator of the Office of 

Administration and Resources 

Management has concurred on this 

decision to make an exception to 

Section 1605 of ARRA. This action 

permits the purchase of a 3 inch 

diameter submersible well pump by the 

District, as specified in its October 19, 

2010 request. 

DATES: Effective Date: December 10, 

2010. 

FOR FURTHER INFORMATION CONTACT: 

Katie Connors, Environmental Engineer, 

(617) 918–1658, or David Chin, 

Environmental Engineer, (617) 918– 

1764, Municipal Assistance Unit (CMU), 

Office of Ecosystem Protection (OEP), 

U.S. EPA, 5 Post Office Square, Suite 

100, Boston, MA 02109–3912. 

SUPPLEMENTARY INFORMATION: In 

accordance with ARRA Section 1605(c), 

the EPA hereby provides notice that it 

is granting a project waiver of the 

requirements of Section 1605(a) of 

Public Law 111–5, Buy American 

requirements, to the District for the 

purchase of a non-domestically 

manufactured 3 inch diameter 

submersible well pump to meet the 

District’s specifications as part of the 

construction of a new bedrock well field 

and raw water transmission line. 

Section 1605 of the ARRA requires 

that none of the appropriated funds may 

be used for the construction, alteration, 

maintenance, or repair of a public 

building or a public works project 

unless all of the iron, steel, and 

manufactured goods used in the project 

is produced in the United States, or 

unless a waiver is provided to the 

recipient by the head of the appropriate 

agency, here the EPA. A waiver may be 

provided if EPA determines that (1) 

applying these requirements would be 

inconsistent with the public interest; (2) 

iron, steel, and the relevant 

manufactured goods are not produced in 

the United States in sufficient and 

reasonably available quantities and of a 

satisfactory quality; or (3) inclusion of 

iron, steel, and the relevant 

manufactured goods produced in the 

United States will increase the cost of 


jlentini on DSKJ8SOYB1PROD with NOTICES