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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?