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§ 2750.4. Alternative Release Scenario Analysis.

19 CA ADC § 2750.4Barclays Official California Code of Regulations

Barclays California Code of Regulations
Title 19. Public Safety
Division 2. California Governor's Office of Emergency Services
Chapter 4.5. California Accidental Release Prevention (CalARP) Program Detailed Analysis
Article 4. Hazard Assessment
19 CCR § 2750.4
§ 2750.4. Alternative Release Scenario Analysis.
Currentness
(a) The number of scenarios. The owner or operator shall identify and analyze at least one alternative release scenario for each regulated toxic substance held in a covered process(es) and at least one alternative release scenario to represent all flammable substances held in covered processes.
(b) Scenarios to consider.
(1) For each scenario required under section (a), the owner or operator shall select a scenario:
(A) That is more likely to occur than the worst-case release scenario under Section 2750.3;
(B) That will reach an endpoint offsite, unless no such scenario exists; and
(C) That will reach a public receptor, unless no such scenario exists.
(2) Release scenarios considered should include, but are not limited to, the following, where applicable:
(A) Transfer hose releases due to splits or sudden hose uncoupling;
(B) Process piping releases from failures at flanges, joints, welds, valves and valve seals, and drains or bleeds;
(C) Process vessel or pump releases due to cracks, seal failure, or drain, bleed, or plug failure;
(D) Vessel overfilling and spill, or over pressurization and venting through relief valves or rupture disks; and,
(E) Shipping container mishandling and breakage or puncturing leading to a spill.
(c) Parameters to be applied. The owner or operator shall use the parameters defined in Section 2750.2 to determine distance to the endpoints. The owner or operator may use either the methodology provided in the RMP Offsite Consequence Analysis Guidance or any commercially or publicly available air dispersion modeling techniques, provided the techniques account for the specified modeling conditions and are recognized by industry as applicable as part of current practices. Proprietary models that account for the modeling conditions may be used provided the owner or operator allows the UPA access to the model and describes model features and differences from publicly available models to local emergency planners upon request.
(d) Consideration of mitigation. Active and passive mitigation systems may be considered provided they are capable of withstanding the event that triggered the release and would still be functional.
(e) Factors in selecting scenarios. The owner or operator shall consider the following in selecting alternative release scenarios:
(1) The five-year accident history provided in Section 2750.9;
(2) Accidents/incidents or events in related industries available through trade magazines, industry associations and other publicly available sources; either digital or print, and
(3) Failure scenarios identified under Section 2755.2, 2760.2, or 2762.2.

Credits

Note: Authority cited: Section 8585, Government Code; and Sections 25531 and 25534.05, Health and Safety Code. Reference: Section 8585, Government Code; Section 25531, Health and Safety Code; and Section 68.28, Part 68, Title 40, Code of Federal Regulations.
History
1. New section filed 7-10-97 as an emergency; operative 7-10-97 (Register 97, No. 28). A Certificate of Compliance must be transmitted to OAL by 11-7-97 or emergency language will be repealed by operation of law on the following day.
2. New section refiled 10-31-97 as an emergency; operative 11-7-97 (Register 97, No. 44). A Certificate of Compliance must be transmitted to OAL by 3-9-98 or emergency language will be repealed by operation of law on the following day.
3. New section refiled 3-9-98 as an emergency; operative 3-9-98 (Register 98, No. 11). A Certificate of Compliance must be transmitted to OAL by 7-7-98 or emergency language will be repealed by operation of law on the following day.
4. New section refiled 7-7-98 as an emergency; operative 7-7-98 (Register 98, No. 28). A Certificate of Compliance must be transmitted to OAL by 11-4-98 or emergency language will be repealed by operation of law on the following day.
5. Certificate of Compliance as to 7-7-98 order, including repealer and new section, transmitted to OAL 10-7-98 and filed 11-16-98 (Register 98, No. 47).
6. Amendment of subsections (b)(1)(A)-(B), new subsection (b)(1)(C), amendment of subsection (e)(1), new subsection (e)(2) and subsection renumbering filed 10-8-2014; operative 1-1-2015 (Register 2014, No. 41).
7. Amendment of subsections (c) and (e)(3) and amendment of Note filed 8-3-2017; operative 10-1-2017 (Register 2017, No. 31).
This database is current through 9/22/23 Register 2023, No. 38.
Cal. Admin. Code tit. 19, § 2750.4, 19 CA ADC § 2750.4
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