Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division –...

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Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division – Air Quality Breakout Session: Transportation Conformity/Air Quality

Transcript of Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division –...

Page 1: Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division – Air Quality Breakout Session: Transportation Conformity/Air.

Recent Developments in Transportation Conformity

Beverly ChenauskyMultimodal Planning Division – Air Quality

Breakout Session: Transportation Conformity/Air Quality

Page 2: Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division – Air Quality Breakout Session: Transportation Conformity/Air.

• Overview of Transportation Conformity

• Recent Changes to Existing Requirements

• Overview of Guidance Documents

• Summary and Additional Resources

Overview

Page 3: Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division – Air Quality Breakout Session: Transportation Conformity/Air.

• Clean Air Act section 176(c)– Requires that federally supported transportation

projects in nonattainment and maintenance areas cannot:

• Cause or contribute to new air quality violations,• Worsen existing violations, or• Delay timely attainment of the NAAQS or interim

milestones(National Ambient Air Quality Standards)

• Transportation conformity rule (40 CFR Part 93)

Overview Transportation Conformity

Page 4: Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division – Air Quality Breakout Session: Transportation Conformity/Air.

Where Transportation Conformity Applies

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Transportation Budgets - Nonattainment Plan

Area

Point

Mobile

Other

This piece of pie becomes the “budget” for transportation plans. The RTP/TIP must

show if implemented emissions will not be greater than 35

tons.

35 Tons

32 Tons

25 Tons

8 Tons

Emissions Inventory in Anytown's Nonattainment Plan for Any pollutant

MVEB – Motor Vehicle Emissions BudgetSIP – State Implementation Plan

Page 6: Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division – Air Quality Breakout Session: Transportation Conformity/Air.

Clean Air Act Section 176 (40 CFR Part 93) Changes Jan 24, 2008

• Conformity redetermination

• Frequency of conformity determinations

• Time Horizons for Conformity

• Conformity Lapse

• Substitution of Transportation Control Measures (TCMs) Inclusion of criteria and procedures

SAFETEA-LU Conformity Rule Changes

Page 7: Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division – Air Quality Breakout Session: Transportation Conformity/Air.

• Describes how a state will meet the requirements of the Conformity Rule.

• At a minimum, the conformity SIP must include three requirements of the conformity rule:– Consultation procedures (40 CFR 93.105)– Written commitments to control measures (40 CFR

93.122(a)(4)(ii)) – Written commitments to mitigation measures (40 CFR

93.125(c))

Conformity - State Implementation Plan (SIP)

Page 8: Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division – Air Quality Breakout Session: Transportation Conformity/Air.

Summary of Conformity Rule Changes after SAFETEA-LU

§ 93.101   Definitions.§ 93.105 Consultation.§ 93.109 Criteria and procedures for determining conformity of

transportation plans, programs, and projects: General.§ 93.111 Criteria and procedures: Latest emissions model. **§ 93.116 Criteria and procedures: Localized CO, PM10, and PM2.5

violations (hot-spots).§ 93.118 Criteria and procedures: Motor vehicle emissions budget.§ 93.119 Criteria and procedures: Interim emissions in areas

without motor vehicle emissions budgets.§ 93.121 Requirements for adoption or approval of projects by other

recipients of funds designated under title 23 U.S.C. or the Federal Transit Laws

March 24, 2010 approved changesAugust 13, 2010 proposed changes** New Emissions Model

Page 9: Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division – Air Quality Breakout Session: Transportation Conformity/Air.

• Proposed Rule: Transportation Conformity Rule Restructuring Amendments - August 13, 2010 – Streamlines definitions to be applicable to all NAAQS – Restructures two sections of the conformity rule, 40 CFR

93.109 and 93.119– Expand clean data flexibility to all NAAQS where EPA has

clean data regulations or policies– Includes hot-spot conformity tests for PM10, PM2.5, CO– Would require consistency with budgets for budget years,

and each year that a regional emissions analysis is done– Would remove specific baseline years and change

definition for “baseline year” and future baseline years in proposed 93.119(e)

Recent Conformity Rule Changes

Page 10: Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division – Air Quality Breakout Session: Transportation Conformity/Air.

• Latest Emissions Models § 93.111 • EPA introduced MOtor Vehicle Emission Simulator (MOVES)

to replace Mobile6.2 prior emissions model released March 2, 2010 for regional conformity required March 2, 2012.– There may be a one year extension unknown at this time??– MOVES requires different sources of data that may not currently be

available, consultation on data assumptions is critical.

– Example: In MOBILE6.2, emission factors were expressed in grams per mile and related to VMT. In MOVES emissions are related to the population of vehicles in an area. Because vehicle population directly determines start and evaporative emission, users must

develop local data for this input.

Changes in How a Conformity Analysis is Done

Page 11: Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division – Air Quality Breakout Session: Transportation Conformity/Air.

• MOVES official use for quantitative CO, PM2.5, and PM10 hot-spot analyses released December 20, 2010 required by December 20, 2012.

– Prior PROJECT level analysis for PM did not require a quantitative analysis or modeling see EPA hot-spot analysis guidance for both CO

and PM10/2.5. • EPA also approved use of new emission factors for

transportation conformity. AP 42, Fifth Edition, Volume I Chapter 13.2.1 Reintrained Road Dust emissions for Paved Roads released February 4, 2011 required by February 4, 2013.– Significantly lowers emissions from older version– Unpaved roads Chapter 13.2.2 has not changed since 2006.

Changes in How a Conformity Analysis is Done

Page 12: Recent Developments in Transportation Conformity Beverly Chenausky Multimodal Planning Division – Air Quality Breakout Session: Transportation Conformity/Air.

Draft PM hot-spot guidance released for public comment May 26, 2010

What is a hot-spot analysis?• An estimation of likely future localized pollutant concentrations

and a comparison to the relevant NAAQS– Required for certain projects in PM2.5, PM10, and CO nonattainment

and maintenance areas.– The area substantially affected by the project (the “project area”)

• In general, a PM hot-spot analysis compares Air Quality concentrations with the proposed project (the build scenario) to Air Quality concentrations without the project (the no-build scenario)– In practice “quantitative” analysis is a complex process

Changes in How a Conformity Analysis is Done

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AP-42

CAL3QHCR or AERMOD

Monitoring + Modeling

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• Does current process meet all the requirements?– Learn the guidance documents and regulations

• Does current staff have necessary tools and resources to meet these requirements?– Training for internal staff or additional costs for

external help

• Where can data gaps be improved?– Regional vehicle classification or count programs

Things to Think About

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http://www.epa.gov/otaq/stateresources/transconf/index.htm

MVEB

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http://www.fhwa.dot.gov/environment/air_quality/conformity/

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???’s

Breakout Session: Transportation Conformity/Air Quality