Loading...
HomeMy WebLinkAboutItem 9 PPP Ops Committee 07-05-17 - P1-101 Sludge Dewatering_Odor Control At opi -. - SLUDGE DEWATERING AND ODOR CONTROL AT PLANT NO. 1 PROJECT P1-101 a _ - Operations CommitteeZ- , ,.•► 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. I � MINN" - i M h r... New Odor Control Facility Work includes: Odor scrubbers Chemicals storage tanks Chemical L • pumps - UUU "' ll StIRWING �- I � aa9=a L� -:�• ' inter - - NEW IN JP t ,�t ♦ , A I M i Ail I 1 ► _ . � ` j�,�L 1 r► �� fail! ` ,r / r ale asfi 1 � €, a� ��� fit � - � u �. •;,` � ,.. i �� � .il s Y 1 3 c m2 1 LU �Arw 06 f ` ol m � E �IlIIm3s�� ®p a 4M a r t4 • JI�U u 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 '?.