2004 Revisions to the Carbon Monoxide Maintenance Plan Categories Topics Air Quality Plans Programs California State Implementation Plans Type Information On July 22, 2004, CARB approved an update to the SIP that shows how the ten areas will maintain the standard through 2018, revises emission estimates, and establishes new on-road motor vehicle emission budgets for transportation conformity purposes.CARB DocumentsSubmittal Letter to U.S. EPA (November 8, 2004)Hearing Notice (June 18, 2004)2004 Plan UpdateResolution 04-20 (July 22, 2004)Motor Vehicle Emissions Inventory and Budget Documentation Carbon Monoxide Budget DerivationCarbon Monoxide Documentation and MethodsCarbon Monoxide Inventory Summary and TablesCarbon Monoxide EMFAC2002 Input Files Related Resources 2024 Transport State Implementation Plan Amendment 2023 Carbon Monoxide SIP Revision 2024 San Joaquin Valley PM2.5 Plan