HomeMy WebLinkAboutItem 9 PPP Ops Committee 07-05-17 - P1-101 Sludge Dewatering_Odor Control At
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SLUDGE DEWATERING AND ODOR CONTROL AT PLANT NO. 1
PROJECT P1-101
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Plant No . 1
Before P1 -100 & P1 -101 Projects
PRIMARY
CLARIFIER DIGESTER BELT FILTER
PRESSES CAKE CAKE
STORAGE LOADOUT
DISSOLVED AIR
SECONDARY FLOTATION
CLARIFIER THICKENERS
After P1 -100 & P1 -101 Projects
PRIMARY THICKENING /
CLARIFIER CENTRIFUGE DIGESTER
DEWATERNG CAKE
CAKE
CENTRIFUGE
STORAGE LOADOUT
SECONDARY
CLARIFIER
Project Scope
• Construct new sludge thickening facilities
• Replace aging dewatering facilities
• Replace aging solids handling odor control
• Rehabilitate storage and truck loadout facility
Current Progress
• New Facilities are 95% physically complete
• Building and mechanical installations are
complete
• Electrical terminations and testing ongoing.
• Rehabilitation and commissioning of two of the
four existing sludge storage silos is complete.
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New Odor Control Facility
Work includes:
Odor scrubbers
Chemicals storage tanks
Chemical
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TotalSystems Requiring Commissioning
of
• Fiber& PLCs Secondary Truck Thickening- Mix, Age Sludge Cake Drainage and
System Load-Out and Feed Polymer Conveyance Slop Pump
• Electrical System Trickling Filter Systems System Systems
• Cake Silos 1 & 3 Sludge Pump 1 Dewatering- Mix, Age Centrate System Industrial Water
• Cake Silos 2 &4 Trickling Filter and Feed Polymer Sludge Cake Booster Pumps
• Silo Foul Air Sludge Pump 2 System Transfer System System
Collection System Trickling Filter Caustic Soda Bulk Foul Air Collection Water Softener
• Permanent/ Sludge Valve Storage & Feed System Systems System
Primary Truck (Suction Side) Sulfuric Acid Bulk Odor Control Bridge Crane
Load-Out Trickling Filter Storage & Feed System System System
• Secondary Truck Sludge Valve Thickening Centrifuge Bleach Facility Power Building
Load-Out Foul Air (Discharge Side) System Pumps A&D 2 (Engine
Collection System Sludge Feed System Thickened Sludge Bleach Facility Generator)
(PS, WAS, SW,TFS) Transfer System Pumps B&C HVAC System
• Blend Tanks Dewatering Centrifuge Security System
• Bulk Storage System Fire Alarm
Polymer Systems System
Remaining Work
• Electrical terminations and programming
• Testing and commissioning
• Rehabilitation and commissioning of remaining
silos and truck loadout facility
• Demolition of existing sludge dewatering and
odor control facilities
Project Challenges
• Unknown Conditions (existing utility conflicts,
temporary facilities, existing facility conflicts,
existing instrumentation coordination, etc. )
• Design clarifications and omissions
• Cake Pump Change
• Functionality changes for ease of Operations
and Maintenance
Major Additional Work Items
AMOUNTSUMM -1" MV
ARY CONTINGENCY
1 7wmm ==a
Change Orders to Date $1,500,000 1.2%
Open Changes, Contractor Requests &
Disputed Items $3,0001000 2.3%
SUBTOTAL $4,500,000 3.5
Schedule Impacts & Delays (Estimate) $2,500,000 2.0%
Potential Future Changes (Forecast) $2,500,000 2.0%
TOTAL $9,500,000 7.5%
Schedule Delays
• Non-compensable Delays :
Relocation of Gas Lines 139 days
Silos 1 and 3 piston pump programming delays 208 days
Additional Commissioning Time (Estimated) +/- 250 days
• Potentially Compensable Delays :
Delay to Commissioning Silos 1 & 3 (Estimated) +/-100 days
Delay to Start of Commissioning at T&D (Estimated) +/- 100 days
Mitigation Measures
• Implemented a "Management Oversight
Committee"
• Implemented collaborative "Panel Task Force"
• Holding schedule workshops to prioritize
work, and to identify & mitigate delays
• Streamlining commissioning procedures
• Sequence commissioning of the dewatering
syste m f i rst
Recommended Action
• Approve a contingency increase of $5,718, 123
(4. 5%) to the construction contract with W. M .
Lyles Company for Sludge Dewatering and Odor
Control at Plant No . 1, Project No . P1- 101, for a
total contingency amount of $9,518, 123 (7.5%) .
Questions '?.