Hazardous Materials Business Plans (HMBP)

Hazardous Materials Business Plans (HMBP) exist in order to provide the public, emergency responding agencies, and local government agencies information regarding the potential for hazardous chemical situations in the community. HMBP aid in:

  • Chemical storage reporting
  • Emergency planning
  • Emergency release notification
  • Toxic chemical release inventory reporting

HMBP are part of the "Community Right-to-Know Act". For more information, please visit the California Office of Emergency Services (CalOES).

Threshold Quantities

A business is required to have an HMBP if its inventory exceeds any of these threshold quantities:

  • Solids - 500 pounds or more
  • Liquids - 55 gallons or more
  • Compressed Gasses - 200 cubic feet or more
  • Extremely Hazardous Substances - Applicable Federal threshold quantities for extremely hazardous substances are specified in 40 CFR Part 355, Appendix A or B
  • Radiological Materials - Quantities for which an emergency plan is required are specified in 10 CFR Parts 30, 40, and 70

Please use our California Environmental Reporting System (CERS) Guidance Document for Businesses (PDF) to assist you in submission of your HMBP.

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