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CalARP Seismic Assessment and Revalidating Guidelines

April 15, 2021 | 10:00 - 11:00 am CDT

Cal/ARP Seismic Assessment and Revalidating Guidelines

To reduce the risk of release of regulated substances as a result of earthquakes, the State of California requires facilities that contain large quantities of regulated substances to comply with the Accidental Release Prevention (CalARP) program by means of reoccurring seismic evaluation of the regulated substance containing facility. CalARP studies are typically revalidated at five-year intervals.

The 2019 CalARP guideline requires that the new seismic evaluation method be based on the current International Building Code and ASCE 7-10 standards. Current regulations have specific prescriptive minimum required content and a general format of the report for new and revalidating reports.

What We Cover

  • The updated CalARP seismic assessment and revalidating guidelines for facilities containing regulated substances.
  • New templates for the CalARP walk down review of vessels, equipment, piping and containment.
  • The ductility-based approach for structures supporting vessels or equipment.

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Todd W. Erickson, Director, Consulting, ABS Group

Todd W. Erickson has a BSCE from the University of Utah (1990) with an emphasis on structures and foundations and is a registered California structural and civil engineer. He has over 31 years of structural and civil engineering experience related to seismic assessment, evaluation, design and strengthening of new and existing facilities and structures in the US and around the world. His experience includes new and historic buildings, bridges, open-frame towers, base isolation systems, equipment supports, central utility plants, pipe racks and storage racks, and their foundations, as well as water treatment, transmission and storage structures and large tie-back earth-retaining structures. Acting as the SEOR, the AE-team manager or peer reviewer in his different roles, his experience includes numerous structures of important historic, technical and societal importance, resulting in his coauthoring several papers. A responding member of the LADWP post-earthquake response team during the 1994 Northridge Earthquake, he has also provided on-site post-earthquake response services during the 1999 Piraeus Earthquake, the 1999 Izmit Earthquake, the 2011 Christchurch Earthquake, the 2016 Ecuador Earthquake and others.

Tracy R. Rich, Project Manager, ABS Group

Tracy R. Rich graduated with a masters degree in structural engineering from the University of California, San Diego in 1998 and holds a professional structural engineering license. He has more than 23 years of engineering experience having performed structural calculations and analysis of various types of structures as well as risk studies and CalARP evaluations for both commercial and industrial facilities. He has design and analysis experience working with a variety of building materials including concrete, steel, masonry and wood as well as experience related to the performance and anchorage of equipment and utilities.

About ABS Group

ABS Group of Companies, Inc. (ABS Group) and its operating subsidiaries provide risk management solutions and certification services worldwide that help clients address the safety, integrity, quality and environmental efficiency of critical assets and operations. Headquartered in Spring, Texas, ABS Group operates with more than 1200 professionals across the globe, serving the marine and offshore, oil, gas and chemical, government, power and energy and industrial sectors. ABS Group is a subsidiary of ABS (, a leading marine and offshore classification society.

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