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Home My WebLink About05.a. Receive update on Filter Plant and Clearwell Improvements, Phase 1A, District Project 7361 Page 1 of 9 Item 5.a. CENTRAL SAN May 12, 2020 TO: ENGINEERING AND OPERATIONS COMMITTEE FROM: CHATHURAABEYRATHNA, ASSOCIATE ENGINEER REVIEWED BY: CRAIG H. MIZUTANI, SENIOR ENGINEER EDGAR J. LOPEZ, CAPITAL PROJECTS DIVISION MANAGER JEAN-MARC PETIT, DIRECTOR OF ENGINEERING AND TECHNICAL SERVICES ROGER S. BAILEY GENERAL MANAGER SUBJECT: RECEIVE UPDATE ON FILTER PLANTAND CLEARWELL IMPROVEMENTS, PHASE 1A, DISTRICT PROJECT 7361 The Filter Plant and Clearwell Improvements, Phase 1A, District Project 7361 design and bid documents are being finalized and the construction contract is scheduled to bid in June 2020. This is a major project and represents over$30 million of future capital expenditures. Attached is a presentation on the current project status prior to the Board announcement on May 21, 2020. Strategic Plan Tie-In GOAL TWO: Strive to Meet Regulatory Requirements Strategy 1 - Strive to achieve 100%permit compliance in air, water, land, and other regulations, Strategy 3- Comply with all federal, state, and local regulations related to District administration GOAL THREE: Be a Fiscally Sound and Effective Water Sector Utility Strategy 2- Manage costs GOAL FOUR: Develop and retain a highly trained and innovative workforce Strategy 3- Meet or exceed industry safety standards GOAL FIVE:Maintain a Reliable Infrastructure Strategy 1 - Manage assets optimally throughout their lifecycle, Strategy 3- Protect District personnel and assets from threats and emergencies GOAL SIX: Embrace Technology, Innovation and Environmental Sustainability Strategy 1 -Augment the region's water supply, Strategy 3- Encourage the review and testing of technology to optimize and modernize business operations May 12, 2020 EOPS Regular Committee Meeting Agenda Packet- Page 29 of 55 Page 2 of 9 ATTACHMENTS: 1. Presentation May 12, 2020 EOPS Regular Committee Meeting Agenda Packet- Page 30 of 55 Page 3 of 9 FILTER PLANT AND CLEARWELL IMPROVEMENTS, PHASE 1A DISTRICT PROJECT 7361 PROJECT UPDATE - - Engineering and Operations Committee Meeting May 12, 2020 - Jean-Marc Petit, P.E. Director of Engineering and Technical Services Edgar Lopez, P.E. Capital Projects Division Manager KgrIff-RUITT M, INITIAL PROJECT OBJECTIVES • Improve performance and reliability of the Recycled Water Plant(RWP) o Filtration o Disinfection o Recycled Water(RW)storage and distribution (Utility Water(UW)and Zone 1) o Electrical Systems • Modernize automation and control of RWP o Migrate from batch operation to continuous operation o Facilitate unattended operation MUM• Position RWP to meet future RW Title 22 demands • Maximize asset value of existing facilities --�"�- o Rehabilitateaiiii o Repurpose • Minimize investment in infrastructure for future RWP expansion • Evaluate impact and possible integration of Concord Redevelopment and Water Exchange Projects � z CENTRALSAN 1 May 12, 2020 EOPS Regular Committee Meeting Agenda Packet- Page 31 of 55 Page 4 of 9 SUMMARY OF KEY FINDINGS AND RECOMMENDED IMPROVEMENTS it 1. Electrical Power Distribution & Motor Control Centers (MCC) 2. Structure 9000 and Forebays 3. Filters - 4. Clearwell - 5. Disinfection 6. Filter Building .ia 3 ProjectKey TA Clearwell: Mechanical, tructural and Failing Electrical Equipment,and East Cell Clearwell CWPS Pump Condition and Cover and Liners Sizing t Combined Storage and CIz Contact ! Filter Capacity and Basins Efficacy Condition w�, �� ' Pipeline and Pipe Electrical Power Supports Condition Distribution Voltage and Reliability Water Quality and Hydraulic Bottleneck Filter Building MARINE Condition and Code Upgrades r a - s Electrical Equipment,and AWPS Pump Condition and 11110 -a 2 May 12, 2020 EOPS Regular Committee Meeting Agenda Packet- Page 32 of 55 Page 5 of 9 RECOMMENDED PHASED IMPLEMENTATION • Split Phase 1 recommendations: o Phase 1A: Proceed with construction on elements of the project o Phase 1 B: Postpone improvement or rehabilitation of other elements that could be impacted if a Water Exchange Project was to proceed • Phase 2: Includes elements which would be triggered and coordinated with Concord Community Reuse Project Jim 5 aCENTRALSAN FILTER AND CLEARWELL PROJECTS F� 4L .. a .. � Carnal Lata Capp .r.,.,�a.....�.,=•.amu MASTER$RE PI„0.N 3 May 12, 2020 EOPS Regular Committee Meeting Agenda Packet- Page 33 of 55 Page 6 of 9 PHASE 1 A SCOPE FOR RECYCLED WATER PLANT FACILITIES IMPROVEMENTS • Add Utility Water Pump Replace Backwash Motors (480V) Recycled Water Storage: n Replace East Clearwell e with two new above ground storage tanks (steel or pre-stressed concrete) • Clearwell Overflow Structure Modifications -X Rehabilitation one Filter (#3)and Mechanical/ 'fes Instrumentations on others Upgrade Chemical Feed - Upgrade/Replace Electrical Gear __ •.kms� New Recycled Pump Station y =' Electrical Facility • Applied Water Pump Replace Substation 40-2400V Station(AWPS) Replace Variable Frequency Drives for AWPS r � CENTRAL SAN PHASE 1A MAJOR SCOPE ELEMENTS • Two new Recycled Water Storage Tanks (3-million gallon capacity each)—Steel or Pre-Stressed Concrete • Maintain West Clearwell • Clearwell Overflow Structure & Filter Effluent Lift Station • Electrical Building and Substation 48 (new Transformers) • Filter Plant • Chemical Feed System: Hypochlorite Feed System • Recycled Water Pump Station and Utility Water Pumps • Wet Weather Basin Levee (using excess soil material) LBidid Alternatives: • 1. Filter No. 3 Rehabilitation • 2.Applied Water Pump Station AW CENTRALSAN 4 May 12, 2020 EOPS Regular Committee Meeting Agenda Packet- Page 34 of 55 Page 7 of 9 OVERALL SITE PLAN ,—.. td ai F _ e ..-- L ®sbneac ra.iabe.d. qq ..a�.,....�..,..• �, - kik1 DYA6EHER4L P.,frE PL4N ikiul — 9 RECYCLED WATER STORAGE MODIFICATIONS f Out OF r Active Service _ West East Active Cl earwell Clearwell West Cleanvell • New Recycled Water Storage will be two 3-million gallon above ground reservoirs • Both welded steel (AWWA D100) and pre-stressed concrete (AWWA D110)will be allowed to submit a bid to AW WA:American Water Works Association,AW WA Standards describe minimum requirements for design,installation,performance,and manufacturin of products used in the drinkin water industr. 5 May 12, 2020 EOPS Regular Committee Meeting Agenda Packet- Page 35 of 55 Page 8 of 9 OVERALL PROJECT SCHEDULE Activity Board Actions Date Request for Proposals from Consultants January 16,2018 Issued Preliminary Design Awarded to Stantec E&O April 25,2018 Board May 3,2018 Alternative Analysis December 2018 Final Design Amendment with Stantec E&O April 16,2019 Board May 2,2019 Final Design Complete May 1,2020 Announcement to Board E&O May 12,2020 Project Ready for Bidding Board May 21,2020 Anticipated Bid Opening July 22,2020 6BoardrLAward August 20,2020 onstSchedule) October 1,2020 to December 31,2022 rojecJanuary 2023 ` 11 TOTAL PROJECT COST PHASE 1A) mw' FY 2020-21 ®®m Planning $1,130,000 $0 $0 $0 $1,130,000 Design $2,870,000 $0 $0 $0 $2,870,000 Construction $1,989,000 $9,000,000 $12,500,000 $11,100,000 $34,589,000 Total $5,989,000 $9,000,000 $12,500,000 $11,100,000 $38,589,000 • Engineer's Estimate is$31 Million (M) • Filter No. 3 Rehabilitation is an additive bid item estimated at$2.78 M • Applied Water Pump Station Renovation is an additive bid item at$0.7 M • Storage tanks material alternatives:AWWA D100 steel or D110 pre-stressed concrete, both allowed to bid • Using excess soil to raise Pacheco Sluice levee, instead of disposal tz -rCENTRALSAN 6 May 12, 2020 EOPS Regular Committee Meeting Agenda Packet- Page 36 of 55 Page 9 of 9 RECOMMENDED BOARD ACTIONS • None required. • Staff is planning to announce the project bidding at the Board meeting on May 21, 2020, which will also include an update of this critical project. 13 -tCENTRALSAN QUESTIONS 14 CENTRALSAN -- May 12, 2020 EOPS Regular Committee Meeting Agenda Packet- Page 37 of 55