How can emission reductions from diesel retrofits be quantified for SIPs and conformity?
For states other than California, EPA recommends that the National Mobile Inventory Model (NMIM) be used for quantifying emission reductions from retrofits for SIP and conformity purposes. NMIM is a graphical user interface that contains the MOBILE6.2 and NONROAD2005 models and a database of county-level input information. Chapter 2 of the guidance provides details on how NMIM can be used for SIP and conformity purposes, including a summary of key inputs that are necessary (for example, information about the fleet such as vehicle miles traveled or hours of use) and issues that users may face when developing input data. Before using NMIM, state and local air quality and transportation agencies should work together with EPA and the U.S. Department of Transportation (DOT) to determine whether NMIM is appropriate given local conditions and modeling methods and to determine what modifications are needed to NMIM’s database. EPA also acknowledges that alternative methods are available and oth
Related Questions
- If I have already received funding for retrofits from another diesel vehicle retrofit program, can I still apply for funds from the Clean Buses for Kids Program?
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