HomeMy WebLinkAbout10.a. (Handout) Receive update on DAF Tank emergency declared on May 2, 2013(Yando1&)
Item 10.a
DAF Tank No. 1
Emergency Repair Update
Craig Mizutani, P.E.
Senior Engineer
June 6, 2013
Central Contra Costa Sanitary District
Work to Date
• April 19 - DAF Tank No. 1 failed
• April 24 - CCCSD Staff begins repair
- Remove Arms
- Cut off track
• April 26 - P.O. Issued to Case /Cotter for Arms
• May 2 - Board authorizes emergency repairs
• May 3 - Repair Work Begins
- Sandblasting (F.D. Thomas)
- Mobilization D.W. Nicholson
• May 29 -30 - Corrective work on coating
• June 8 - Tank scheduled to be ready for service
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New Baffle, Track and Coating
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Trial Fit - New Collector Arm
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Future Work
• Inspect DAF Tank Nos. 2 & 3 (structural and
equipment inspection)
• Investigate new coating systems
• Repair worn /corroded parts
• Sandblast and coat tanks 2 & 3 (and Tank
No. 1 arms)
• Replace original drive on DAF Tank No. 2.
(planned prior to failure)
Estimated Costs
• Currently Authorized = $200,000
• Estimated Contractor /Vendor Costs = $250,000
• Additional Costs: Structural steel and field
modifications to arms
• District Engineering/Inspection costs being
tracked as part of DP 7298, TP Piping
Renovations, Phase 7. Estimated at $45,000.
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Summary /Staff Recommendation
• DAF tank anticipated to be returned to service
June 8, 2013
• Revised Contractor /Vendor Costs = $250,000
• Continue emergency DAF tank repairs utilizing
Case /Cotter Inc., D.W. Nicholson Corp. and
District forces
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