Regional Air District/Regional Councils of Government (COGs), Metropolitan Planning Organizations (MPOs), State departments of transportation (DOTs)
- Conducts modeling analysis; determines attainment target; possible paths
- Assembles emissions inventory; prepares forecasts; calculates future emissions reduction shortfall
- Develops initial control measure package
- Writes and revises draft plan
- Conducts local workshop/hearing process
- Adopts plan
State DOTs/State Air Agency
- Provide technical, policy, legal, and strategic advice to districts/COGs, MPOs
- Through interagency consultation process, comment on major policy issues and measures
- Review and approves final plan; submits to US EPA as SIP revision
US EPA
- Issues guidelines/requirements
- Assists in SIP preparation/adopt Federal control strategies
- Issues findings of failure to implement and failure to submit
- Approves/Disapproves SIP
There is two-way interaction between "Writes and revises draft plan" and "Through interagency consultation process, comment on major policy issues and measures" as well as between "Through interagency consultation process, comment on major policy issues and measures" and EPA's approval process.
Source: Adapted from California Air Resources Board. (Please note: many States do not have local or regional air districts or agencies. The State air agency will likely have a greater role in SIP preparation in these States.)
