HomeMy WebLinkAboutItem 5 PPP Operations Committee 3-1-17 - P1-100 Contingency Increase WE
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SLUDGE DIGESTER REHABILITATION AT PLANT NO. 1 PROJECT P1-100
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Plant No . 1 Digesters
Before P1 -100 & P1 -101 Projects
PRIMARY
CLARIFIER DIGESTER BELT FILTER
PRESSES CAKE CAKE
STORAGE LOADOUT
DISSOLVED AIR
SECONDARY FLOTATION
CLARIFIER THICKENERS
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After P1 -100 & P1 -101 Projects
PRIMARY THICKENING
CLARIFIER CENTRIFUGE DIGESTER
DEWATERNG CAKE CAKE
CENTRIFUGE STORAGE
LOADOUT
71-F17 - i ---00-N,
SECONDARY
CLARIFIER
Current Status
• Rehabilitation of all digesters is complete;
commissioning two remaining digesters.
• Potential unknowns are identified and mitigated
• Project is two months ahead of revised schedule
• Forecasted completion this summer
• Only remaining area of concern is safety risk of
the digester domes
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Digester RoofingTest Patches
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Test patches for different roofing systems to select
best system to implement at remaining 8 digesters
Current Diges-ter Roofing
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New cementitious-based roofing system
installed at remaining 8 digesters
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Recommended Action
• Mitigate potential slip hazards by installing now
• Match the roofing system on the other digesters
with consistent warranty
• Work can occur without shutdowns to digesters
• Pre-negotiated costs, work is well understood
• Work is planned to complete within the current
schedule
• Cost efficiencies over a separate project
Recommended Action
• Approve a contingency increase of $ 1,005,000
(3%) to the construction contract with JR Filanc
Construction Company for Sludge Digester
Rehabilitation at Plant No . 1, Project No. P1-100,
for a total contingency of $ 10,217,500 (30. 5%) .
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