"Hot Spots" Inventory Guidelines
This page last reviewed February 20, 2014The AB 2588 Air Toxics "Hot Spots" Emission Inventory Criteria and Guidelines Regulation (Guidelines) provides direction and criteria to facilities on how to compile and submit air toxics emission data required by the "Hot Spots" Program. On November 16, 2006, ARB staff presented to the Board proposals for amending the Guidelines to incorporate diesel PM into the "Hot Spots" Program. The Board approved the proposed amendments to the Guidelines with modifications.
Current Regulations (approved by OAL on August 27, 2007)Regulation (CCR) (pdf - 42k)
Emission Inventory Criteria and Guidelines Report (Sections I-XI) (doc - 325k)
(pdf - 325k)
Appendix A (List of Substances) (Excel - 178k) (A-I pdf - 115k) (A-II pdf - 64k) (A-III pdf - 55k) (Notes pdf - 64k)
Appendix BI (Reporting Formats) (doc - 104k) (pdf - 104k)
Appendix BII (Reporting Forms) (doc - 1,913k) (pdf - 1,913k)
Appendix C (Facility Responsibilities) (doc - 195k) (pdf - 195k)
Appendix D (Source Testing) (doc - 91k) (pdf - 91k)
Appendix E (Requirements for Smaller Facilities) (doc - 75k) (pdf - 75k)
Appendix F (Screening HRAs) (doc - 57k) (pdf - 57k)
Appendix G (Documents Incorporated by Reference) (doc - 55k) (pdf - 55k)
The Guidelines are organized into sections which address related requirements. Sections are included on applicability, facility removal from the program, update categories, reporting requirements, and source testing requirements.
The appendices to the Guidelines are useful documents which may be downloaded separately from the Guidelines Report. Appendix A includes three lists of substances in the program: those for which emissions must be quantified; those for which production, use, or other processes must be reported; and those which need not be reported unless manufactured by the facility. Appendix B contains reporting formats and instructions. Appendix C is the Facility Guideline Index which specifies responsibilities for specific facility classes. Appendix D indicates source testing requirements. Appendix E specifies requirements for classes of facilities emitting less than 10 tons per year of criteria pollutants. Appendix F contains the criteria for inputs for risk assessment using screening air dispersion modeling. Appendix G is the list of documents which have been incorporated into the Guidelines by reference.
Frequently Asked Questions (FAQs) (doc) (pdf) (as of 9/07)
DRAFT - Screening Risk Assessment Tables for Diesel Engines
ARB's Emission Factor Certification Database
1989 Technical Guidance Document for EI Guidelines (PDF - 8MB!)
Addendum to TGD for wood fired boilers
More Information about Appendix A - List of Substances
for local air district staff only:
Clearinghouse of diesel engine emissions data