HomeMy WebLinkAboutItem No. 6 PPP P2-92 Sludge Dewatering and Odor Control P2 ■ � ,� Sludge Dewatering
and Odor Control
9 Fill MMMMMW� at Plant 2
Project No . P2 =92
Operations Committee
1 \� ■ 'n`.a' �� July 10, 2019
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Project S _ �=
Replacement
DIGESTERS
DEWATERING CAKE
CENTRIFUGE STORAGE CAKE LOADOUT
• Replace dewatering facilities that have reached
the end of their service life at Plant No. 2 with
more efficient technology
• Lower biosolids management costs by reducing
water content
• Construct new odor control and chemical feed
facilities for the new dewatering process
• Demolish the aging belt press building
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• Construction 95% complete
• Testing of centrifuges is
complete
• Demolition of existin
dewatering building Pas started
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• 2013 Hazardous Material Survey:
• Asbestos testing was limited
• Lead paint was in fair condition not requiring abatement
• 2019 Hazardous Material Survey:
• Identified over 700 gaskets as asbestos containing material
• Lead paint is now in poor condition requiring abatement
• Abatement will use the remaining project contingency
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ContractStatus
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Potential
, Contingency Requirement'
1
Groundwater dewatering risk (45 feet drawdown required)
Unidentified subgrade structures
Unidentified utilities passing through demolition area
Construction interface with adjacent facilities
. .
Original Construction Contract $49,850,000
Authorized Contingency $2,492,500 5%
Additional Contingency Requested $498,500 1%
Total Contingency with this request $2,991,000 6%
Recommended Acti
711"�%-'
• Approve a contingency increase of $498 , 500 ( 1 %)
to the construction contract with Shimmick
Construction Company, Inc. for Sludge
Dewatering and Odor Control at Plant 2 , Project
No . P2-92 , for a total contingency of $2 , 991 , 000
Questions '?.
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