64$_{ }$ 87  EPA,  Guideline for Modeling Carbon Monoxide from Roadway Intersections ,  http://www.epa.gov/scram001/guidance/guide/coguide.pdf.  88  EPA,  Using MOVES in Project-Level Carbon Monoxide Analyses,  December 2010 [EPA-420-B-10-041],  http://www.epa.gov/oms/stateresources/transconf/policy/420b10041.pdf  89 EPA,  Transportation Conformity Guidance for Quantitative Hot-spot Analyses in PM$_{2.5 }$and PM$_{10 }$Non- attainment and Maintenance Areas,  November 2013 [EPA-420-B-13-053],  http://www.epa.gov/otaq/stateresources/transconf/policy/420b13053-sec.pdf.  This section provides a general overview of the process for conducting a quantitative CO and/or  PM hot-spot analysis. Differences between the two modeling methods (i.e., CO and PM) are  mentioned but further detailed in  Appendix D ,  Airport Dispersion Modeling , and documented in  the aforementioned EPA technical guidance documents.  This guidance describes how to complete quantitative hot -spot analyses for certain  highway and transit projects in PM$_{10 }$and PM$_{2.5 }$nonattainment and maintenance areas. In  addition, this guidance describes transportation conformity requirements for hot -spot  analyses, and provides technical guidance on estimating project emissions with EPA’s  MOVES model, California’s EMFAC model, and other methods.  PM (i.e., PM$_{10 }$and PM$_{2.5}$) hot-spot analyses are required for projects of local air quality concern,  which include certain highway and transit projects that involve significant levels of diesel  vehicle traffic and any other project identified in the PM SIP as a localized air quality  concern.  Presently, the principal guidance document for assessing PM hot-spot analysis issued by EPA (in  coordination with DOT) is the following:  This guidance supersedes the emission factor sections from the 1992 CO Guidelines to  reflect the use of the MOVES emissions model for project -level CO analyses.  In  particular, this guidance describes how to use the MOVES emissions model to estimate  CO emissions from transportation projects, including roadway intersections, highways,  transit projects, parking lots and intermodal terminals. This guidance can be applied when  using MOVES to complete any project-level quantitative CO analysis, including hot-spot  analyses for transportation conformity determinations, modeling project -level emissions  for SIP development, and completing analyses pursuant to NEPA.  This guidance provides the methodology for estimating the air quality impacts associated  with vehicular traffic at intersection(s) to determine if such impacts may exceed NAAQS for CO.  Aviation Emissions and Air Quality Handbook  • Guideline for Modeling Carbon Monoxide from Roadway Intersections 87  • Using MOVES in Project-Level Carbon Monoxide Analyses 88  • Transportation Conformity Guidance for Quantitative Hot -spot Analyses in PM 2.5  and  PM$_{10 }$Nonattainment and Maintenance Areas 89  7.2.3.  Roadway Dispersion Modeling Methods  PM Project-level Analyses 