California Accidental Release Prevention

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​The California Accidental Release Prevention (CalARP) program was implemented on January 1, 1997 and replaced the California Risk Management and Prevention Program (RMPP). The purpose of the CalARP program are to prevent accidental releases of substances that can cause serious harm to the public and the environment, to minimize the damage if releases do occur, and to satisfy community right-to-know laws. This is accomplished by requiring businesses that handle more than a threshold quantity of a regulated substance listed in the regulations to develop a Risk Management Plan (RMP). An RMP is a detailed engineering analysis of the potential accident factors present at a business and the mitigation measures that can be implemented to reduce this accident potential. The RMP contains:

  • Safety information
  • A hazard review
  • Operating procedures
  • Training requirements
  • Maintenance requirements
  • Compliance audits
  • Incident investigation procedures

The CalARP program is implemented at the local government level by Unified Program Agencies (UPAs). The CalARP program is designed so these agencies work directly with the regulated businesses. The UPAs determine the level of detail in the RMPs, review the RMPs, conduct facility inspections, and provide public access to most of the information. Confidential or trade secret information may be restricted. For public requests of information contact the UPAs directly.


Contact Information

Jack Harrah, Senior Emergency Services Coordinator
Hazardous Materials
Phone: (916) 845-8759 

​CalARP Documents



CalARP Program 4 Notice and Informative Digest Version 2016 Program 4 Notice and Informative Digest Version 2016.pdfCalARP Program 4 Notice and Informative Digest Version 2016HazMat - CalARP - Proposed Program 47/14/2016 5:07:47 PM
CalARP Program 4 Public Hearing August 2016 Final Program 4 Public Hearing August 2016 Final.pdfCalARP Program 4 Public Hearing August 2016 FinalHazMat - CalARP - Proposed Program 48/3/2016 8:49:29 PM
CalARP Proposed Regs 2016 Proposed Regs 2016.pdfCalARP Proposed Regs 20162016 Proposed Regulations - additional petroleum refinery requirements from Interagency Working Group on Refinery Safety - will form a new Article 6.5 Program 4. Comments to - SUBJECT LINE: "Cal ARP Comments."HazMat - CalARP - Proposed Program 47/14/2016 4:44:31 PM
ISOR 2016 2016.pdfISOR 2016Initial Statement of ReasonsHazMat - CalARP - Proposed Program 47/14/2016 5:09:06 PM
Notice of Extension of Written Comment Period CalOES CalARP Program 4 of Extension of Written Comment Period CalOES CalARP Program 4.pdfNotice of Extension of Written Comment Period CalOES CalARP Program 4HazMat - CalARP - Proposed Program 48/22/2016 10:36:04 PM
Refinery Rpt Feb 2014 Rpt Feb 2014.pdfRefinery Rpt Feb 2014Governor's Interagency Refinery Task Force ReportHazMat - CalARP - Proposed Program 47/14/2016 5:22:25 PM
Std 399 for Notice Filing Signed 2016 399 for Notice Filing Signed 2016.pdfStd 399 for Notice Filing Signed 2016HazMat - CalARP - Proposed Program 47/14/2016 6:06:41 PM
CalARP Frequently Asked Questions (FAQ) FAQ - Feb2014.pdfCalARP Frequently Asked Questions (FAQ)Frequently Asked Questions concerning the CalARP program - February 2014HazMat - CalARP4/13/2015 3:04:10 PM
CalARP Guidance Guidance Jan2005.pdfCalARP GuidanceCalARP Program Administering Agency Guidance - January 2005HazMat - CalARP4/13/2015 3:04:18 PM
CalARP Mixtures Frequently Asked Questions (FAQ) Mixtures FAQ - Jan2014.pdfCalARP Mixtures Frequently Asked Questions (FAQ)Frequently Asked Questions regarding CalARP Mixtures - January 2014HazMat - CalARP4/13/2015 3:04:24 PM
CalARP Refinery Emergency Response Program Draft Regulations 5-19-16 Refinery Emergency Response Program Draft Regulations 5-19-16.docxCalARP Refinery Emergency Response Program Draft Regulations 5-19-16HazMat - CalARP5/23/2016 3:11:02 PM
CalARP Regulations 2015 Regulations 01012015.pdfCalARP Regulations 2015Cal OES Text of Regulations regarding the California Accidental Release Prevention program. These regulations take effect January 1, 2015HazMat - CalARP4/13/2015 3:04:37 PM
CalARP Seismic Assessment Guidance LEPC I Approved 03 12 2014.pdfCalARP Seismic Assessment GuidanceCalARP Seismic Assessment Guidance prepared by the CalARP Program Seismic Guidance Committee (December 2013). Approved by Region I LEPC on March 12, 2014HazMat - CalARP4/13/2015 3:04:43 PM

​Laws and Regulations

Listed below are State and Federal Laws and Regulations that affect the CalARP program:

State Statute: Health and Safety Code Sections 25531 - 25543.3

State Regulation: Title 19, California Code of Regulations, Division 2, Chapter 4.5

Related Federal Program: Clean Air Act 112(r) and Title 40, Code of Federal Regulations, Part 68 


Listed below are useful links related to the CalARP program. Some of these links may point to an external website. Cal OES is not responsible for content found on these sites.

CalEPA California Environmental Reporting System (CERS)

U.S. Dept. of Homeland Security Chemical Facility Anti-Terrorism Standards (CFATS)

CalEPA Unified Program Agencies (UPA) Directory

CalEPA Unified Program

U.S. Chemical Safety Board



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