HomeMy WebLinkAbout08.a (Handout) re Seismic Improvements Program$.a. �andoaf)
Item 8.a
SEISMIC IMPROVEMENTS
PROGRAM
Presentation to Board of Directors
September 2, 2010
Seismic Study has Identified Deficiencies
in Critical District Facilities
Concord Fault Proximity to District Facilities
Preliminary Seismic Status
• Work completed (HHWCF, Standby Power
Facility, and new CSOD Building)
• Pre - design
■ Headquarters Office Building (HOB)
■ Pump & Blower Building (PBB)
■ Defer
• Plant Operations Building (except critical works)
• Solids Conditioning Building (pending regulations)
■ 4737 Warehouse (work with Real Estate
Committee)
Headquarters Office Building (HOB)
■ Deficiency
■ Does not meet Life Safety: 2007 CBC, ASCE 41,
FEMA 351
• Flexible building structure
• Steel moment frames with wood diaphragm
■ Impact
■ Over 100 employees present
■ Disruption to customer service activity
Pump & Blower Building (PBB)
■ Deficiency
■ Does not meet Life Safety: 2007 CBC, ASCE 41,
FEMA 351
• Excessive displacements
• Steel moment frames
■ Columns over- stressed
■ Impact
■ Treatment Process: Aeration Air SteamTurbines,
Electric Blower, Primary Effluent and Final Effluent
Pumps, and Service Air Compressors.
Recommendation
■ Recommended by the Capital Projects
Committee
■ Approve the authorizations to perform seismic
pre- design for
■ Headquarters Office Building (DP 8226)
■ Pump & Blower Building (DP 7291)
■ Will return to Board with findings and determine
next steps