This page last reviewed December 11, 2014
Air Quality Planning and Science Division
State Implementation Plan (SIP) related technical products are provided here.
SIP Guidance and Plans
- ARB's Draft Statewide Air Quality Plan
- SIP Attainment Demonstration Guidance from U.S. EPA
- San Joaquin Valley 2007 Ozone Plan
- Draft 2007 South Coast AQMD Air Quality Management Plan
- 8-Hour Ozone Attainment Plan for San Diego County
SIP Modeling and Planning Inventories (v1.06)
- Mobile Source Inventory
Documentation describing the mobile source inventory used for the 8-hour ozone SIPs is available here.
- Additional OFFROAD Documentation
- Goods Movement
- Ocean-Going Vessels
- Commercial Harbor Craft
- Cargo Handling Equipment
SIP Modeling Tools and Documentation
Comprehensive Air Quality Model with Extensions (CAMx)
The CAMx model from ENVIRON is being used for 8-hour ozone modeling in support of 8-hour ozone State Implementation Plans. The model source code and documentation for CAMx are available on ENVIRON's web site here.
Community Multi-Scale Air Quality Model (CMAQ)
U.S. EPA's CMAQ model is being used for PM2.5 modeling in support of the San Joaquin Valley's PM2.5 SIP. The model source code and documentation are available here.
Mesoscale Meteorological Model Version 5 (MM5)
MM5, developed by Penn State University and the National Center for Atmospheric Research, was used to develop meteorological modeling fields for 8-hour ozone and PM2.5 SIP development. The model and its documentation are available here.
- 8-Hour Ozone Modeling Protocol for Central California
- All 8-hour ozone SIP modeling for Central California is being performed using the Central California Ozone Study (CCOS) modeling domain. This domain includes all of the 8-hour ozone non-attainment areas in Central California. Click here for a map of the CCOS modeling domain.
- PM2.5 SIP modeling for the San Joaquin Valley is being conducted using the modeling domain shown here.
Central California (8-Hour Ozone)
- July 7-13, 1999
- July 27-August 2, 2000
During the summer of 2000, a large-scale field study was
carried out in Central California. The study collected intensive
monitoring data, both at the surface and aloft, in support of SIP
preparation for the non-attainment areas in the region. Air quality
and meteorological data for the July 27-August 2, 2000 episode were
collected during the study, and are available via the Central
California Air Quality Studies data access web page
Two multi-day ozone episodes are being simulated in support of the 8-hour ozone SIPs in Central California. The episodes include the following days:
8-Hour Ozone Carrying Capacity Diagrams
- 2012 (Baseline + Baseline Adjustments)
- 2018 (Baseline + Statewide Concepts)
- 2020 (Baseline + Statewide Concepts)
- 2023 (Baseline + Baseline Adjustments)
- Adjustments to Planning Inventories for Modeling
Sacramento Metro Non-Attainment Area
San Joaquin Valley