(extracted from North Carolina's Air Quality Guidelines for Environmental Documents, August 2007)
A PM2.5 Hotspot analysis is required for projects in Catawba, Davidson and Guilford Counties (that meets the PM2.5 hotspot analysis criteria).
The PM2.5 and PM10 Hot-Spot Analysis in Project-Level Transportation Conformity Determinations for the New PM2.5 and Existing PM10 National Ambient Air Quality Standards; Final Rule (March 10, 2006) can be found on the EPA website at the following address: http://www.epa.gov/fedrgstr/EPA-AIR/2006/March/Day-10/a2178.htm
The Transportation Conformity Guidance for Qualitative Hot-spot Analyses in PM2.5 and PM10 Nonattainment and Maintenance Areas (March 2006) can be found on the FHWA website at the following address: http://www.fhwa.dot.gov/environment/air_quality/conformity/policy_and_guidance/tcgfinal.cfm
The PM Hotspot Final Rule and the Transportation Conformity Guidance for Qualitative Hotspot Analyses (website addresses provided above) are the key information documents that will aid in determining if a PM2.5 hotspot analysis will be required in the environmental documents for projects in the PM2.5 nonattainment areas.
A summary of the PM2.5 and PM10 Hot-Spot Analysis in Project-Level Transportation Conformity Determinations for the New PM2.5 and Existing PM10 National Ambient Air Quality Standards; Final Rule (March 10, 2006) is provided in Attachment 1.
A checklist to determine whether or not a project is of air quality concern for PM 2.5 hot spot requirements is provided in Attachment 2.
A checklist that highlights major process steps for projects that require a PM 2.5 qualitative hot spot analysis is provided in Attachment 3.
Summary of the PM2.5 and PM10 Hot-Spot Analysis in Project-Level Transportation Conformity Determinations for the New PM2.5 and Existing PM10 National Ambient Air Quality Standards; Final Rule (March 10, 2006)
Hot-Spot analyses are only required for projects of "air quality concern."
Projects of "air quality concern" are outlined in 40 CFR Sections 92.123(b)(1)(i)-(v). These Sections are listed below with their associated preamble discussion.
Section 93.123(b)(1)(i): New or expanded highway projects that have a significant number of or a significant increase in diesel vehicles;
Section 93.123(b)(1)(ii): Projects affecting intersections that are at Level-of- Service D, E, or F with a significant number of diesel vehicles, or those that will change to Level-of-Service D, E, or F because of increased traffic volumes from a significant number of diesel vehicles related to the project;
Similar highway projects that involve a significant increase in the number of diesel transit busses and diesel trucks.
Section 93.123(b)(1)(iii): New bus and rail terminals, and transfer points, that have a significant number of diesel vehicles congregating at a single location;
Section 93.123(b)(1)(iv): Expanded bus and rail terminals, and expanded transfer points, which significantly increase the number of diesel vehicles congregating at a single location; and
A new or expanded bus terminal that is serviced by non-diesel vehicles (e.g., compressed natural gas or hybrid electric vehicles);
Section 93.123(b)(1)(v): Projects in or affecting locations, areas, or categories of sites which are identified in the PM10 or PM2.5 applicable implementation plan or implementation plan submission, as appropriate, as sites of violation or possible violation.
The final rule requires a qualitative PM2.5 hot-spot analysis to be completed for project-level conformity determinations for projects of "air quality concern" completed in PM2.5 nonattainment areas on or after April 5, 2006, when PM2.5 conformity requirements apply. Quantitative analyses are not required for these projects at this time since EPA is not requiring quantitative PM2.5 hot-spot analyses under 40 CFR 93.123(b)(4) since quantitative hot-spot modeling techniques and associated EPA modeling guidance still do not exist. Qualitative PM2.5 hot-spot analyses should be completed according to joint EPA and DOT guidance.
Quantitative analyses will be required when modeling techniques and guidance are released by EPA through Federal Register notice.
Categorical hot-spot findings are an option for projects of "air quality concern."
This final rule provides for FHWA and FTA to make categorical hot-spot findings as appropriate for PM2.5 and PM10 hot-spot analyses for projects listed in 40 CFR 93.123(b)(1) of today's final rule.
The modeled scenarios used by DOT to make categorical hot-spot findings would be derived through consultation and participation by EPA.
A project-level conformity determination relying on the categorical finding and meeting all other requirements is still required.
Modeling used to support a categorical hot-spot finding must be based on appropriate motor vehicle emissions factor models, dispersion models, and EPA's future quantitative hot-spot modeling guidance. As a result, categorical hot-spot findings will not be made prior to EPA's announcement in the Federal Register that quantitative PM2.5 and PM10 hot-spot analyses are required (40 CFR 93.123(b)(4)).
Categorical hot-spot findings must be supported by credible modeling demonstrations showing that project categories will not cause or contribute to new or worsened violations of the air quality standards. Such modeling would need to be derived in consultation with EPA, and consistent with EPA's future PM2.5 and PM10 quantitative hot-spot modeling guidance.
Determination of Project Categorization for PM2.5 Hot-Spot Requirements
Project Name: (fill in information)
Project Number: (fill in project TIP number))
Location (non-attainment area-Guilford, Davidson, Catawba): (fill in information)
Document Type (CE, EA, EIS): (fill in information)
Project Status (PE, ROW, Construction): (fill in information)
FHWA Contact: (fill in information)
NCDOT Contact: (fill in information)
Project Description: (fill in information)
□ Is this project in a conforming Plan/TIP? (If yes fill in the information below):
This project is in the approved (fill in year) Transportation Improvement Program (TIP) and (fill in years) Regional Transportation Plan. The TIP number is (fill in TIP number).
□ Is the project on a new or expanded highway or expressway that serves a significant volume of diesel truck traffic, such as a facility with greater than 125,000 annual average daily traffic (AADT) and 8% or more of such AADT is diesel truck traffic? (fill in information)
□ Does the project construct new exit ramps or other highway facility improvements that connect a highway or expressway to a major freight, bus, or intermodal terminal? (fill in information)
□ Does the project expand an existing highway or other facility that affects a congested intersection (Operates at LOS D, E, or F) that has a significant increase in the number of diesel trucks? (fill in information)
Since (fill in project TIP number) was not found to be a project of air quality concern under 40 CFR 91.123(b)(1), a qualitative PM 2.5 hot-spot analysis is not required. The following statement will be added to the environmental document for the proposed project:
A qualitative PM 2.5 hot-spot analysis is not required for this project since it is not an air quality concern. The Clean Air Act and 40 CFR 93.116 requirements were met without a hot-spot analysis, since this project has been found not to be of air quality concern under 40 CFR 93.123(b)(1). This project meets the statutory transportation conformity requirements without a hotspot analysis.
PM 2.5 HOT SPOT ANALYSIS DOCUMENTATION
NCDOT TIP Number and Project Name: ___________________________________
Project Description: _______________________________________________________
PM2.5 non-attainment or maintenance area (county name): ______________________
STEP 1: AIR QUALITY CONCERN STATUS
Project Status (NEPA type) ____________________________________________________
Project Sponsor (State, Local, City, Other) ____________________________________________
Air Quality Concern
Project of Air Quality Concern. Select one from the list below
□ New or expanded highway projects with a significant number of, or increase in, diesel vehicles (125,000 AADT and 10,000 (8%) diesel truck traffic)
□ Project affecting intersections with a current or projected LOS D, E, or F and a significant number of diesel vehicles
□ New or expanded bus and rail terminals and transfer points that have significant number of diesel vehicles congregating at a single location
STEP 2: ANALYSIS AND DOCUMENTATION
Type of Analysis (review the Transportation Conformity Guidance for Qualitative Hotspot Analysis in PM2.5 and PM10 Nonattainment and Maintenance Areas dated March 2006 for more information)
Qualitative Select one or both
□ Comparison to another location with similar characteristics
Documentation To Be Included for the PM2.5 Hot-spot analysis
Meetings, Notices, Dates
Transportation Conformity (TC) Interagency Consultation (IC) meeting(s) __________ (attach minutes)
(EPA, NCDENR-DAQ, FHWA, FTA)
FHWA ________________ (date)
NCDENR-DAQ ________________ (date)
FTA ________________ (date)
EPA ________________ (Date)
(attach documentation showing review comments and resolution of those comments)
Public notice (should be consistent with NEPA project)__________________________________ (attach)
Public review & comment period (should be consistent with NEPA project) ____________________ (dates)
Public concerns addressed ___________________________________________
STEP 4: SIGNATURES