HomeMy WebLinkAboutItem 09 PPP Ops Committee 07-05-17 - P1-101SLUDGE DEWATERING AND ODOR CONTROL AT PLANT NO. 1
PROJECT P1-101
Operations Committee
July 5, 2017
Plant No. 1
PRIMARY
CLARIFIER
SECONDARY
CLARIFIER
DIGESTER
CAKE
STORAGE CAKE
LOADOUT
DISSOLVED AIR
FLOTATION
THICKENERS
BELT FILTER
PRESSES
PRIMARY CLARIFIER
THICKENING
CENTRIFUGE
SECONDARY
CLARIFIER
DIGESTER CAKE
STORAGE CAKE
LOADOUT
DEWATERNG
CENTRIFUGE
Before P1-100 & P1-101 Projects
After P1-100 & P1-101 Projects
•Construct new sludge thickening facilities
•Replace aging dewatering facilities
•Replace aging solids handling odor control
•Rehabilitate storage and truck loadout facility
Project Scope
•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.
Current Progress
New Site Facilities
New Pipe Rack and Wall
New Odor Control Facility
Work includes:
•Odor scrubbers
•Chemicals storage tanks
•Chemical feed pumps
Modifications to Truck Loading
New Thickening & Dewatering (T&D) Building
Centrifuges
T&D Basement
T&D Electrical Panels
Inside T&D Control Panels
Systems Requiring Commissioning
Total of 37 systems
•Fiber & PLCs System
•Electrical System
•Cake Silos 1 & 3
•Cake Silos 2 & 4
•Silo Foul Air Collection System
•Permanent /
Primary Truck
Load-Out
•Secondary Truck Load-Out Foul Air
Collection System
•Secondary Truck Load-Out
•Trickling Filter
Sludge Pump 1
•Trickling Filter
Sludge Pump 2•Trickling Filter
Sludge Valve
(Suction Side)
•Trickling Filter
Sludge Valve (Discharge Side)
•Sludge Feed System
(PS, WAS, SW, TFS)
•Blend Tanks
•Bulk Storage Polymer Systems
•Thickening -Mix, Age and Feed Polymer
Systems
•Dewatering -Mix, Age
and Feed Polymer
System•Caustic Soda Bulk
Storage & Feed System
•Sulfuric Acid Bulk
Storage & Feed System
•Thickening Centrifuge System
•Thickened Sludge
Transfer System
•Dewatering Centrifuge
System
•Sludge Cake Conveyance
System
•Centrate System
•Sludge Cake
Transfer System•Foul Air Collection
Systems
•Odor Control
System
•Bleach Facility Pumps A&D
•Bleach Facility
Pumps B&C
•Drainage and Slop Pump
Systems
•Industrial Water
Booster Pumps
System•Water Softener
System
•Bridge Crane
System
•Power Building 2 (Engine
Generator)
•HVAC System
•Security System
•Fire Alarm System
•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
Remaining Work
•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
Project Challenges
Major Additional Work Items
SUMMARY AMOUNT % CONTINGENCY
Change Orders to Date $1,500,000 1.2%
Open Changes, Contractor Requests &
Disputed Items $3,000,000 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%
•Non-compensable Delays:
•Potentially Compensable Delays:
Schedule Delays
Relocation of Gas Lines 139 days
Silos 1 and 3 piston pump programming delays 208 days
Additional Commissioning Time (Estimated)+/-250 days
Delay to Commissioning Silos 1 & 3 (Estimated)+/-100 days
Delay to Start of Commissioning at T&D (Estimated)+/-100 days
•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
system first
Mitigation Measures
•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%).
Recommended Action
Questions?