Progress Through: December 31, 2024
Quarterly Progress Report
San Mateo Clean
Water Program
for the
Wastewater
Treatment Plant
Projects
4th Quarter Report October 1, 2024
to December 31, 2024
Submitted on: January 21, 2025
CITY
CALIFORNIN
A LLLI
CLEANWATERPROGRAM
PROTECTING THE BAY FOR A SUSTAINABLE FUTURE
SAN MATEO CLEAN WATER PROGRAM QUARTERLY REPORT
Q4 2024
Active Wastewater Treatment Plant Projects
46T003 WWTP Nutrient Removal and Wet Weather Flow
Management Upgrade
Project Description:
The WWTP Upgrade and Expansion Project will replace aging Project Inside infrastructure, provide capacity for wet weather flows, comply with Project Manager regulatory requirements, enhance reliability, and produce a higher quality GMP1 - Contract GMP2 - Contract
Contractor Sundt Sundt
Award Date 5/6/2019 5/4/2020
Construction NTP 6/4/2019 552020
Duration (calendar days) 1124
Contracted Completion Date 7/1/2022 01/14/2022
Total Original Contract Amount $33,098,178.00 $17,716,049.00 Contingency Amount $1,725,000.00 $1,645,000.00
Substantial Completion Date 2/1/2023 3/6//2024
Current Contracted Amount $34,783,550.00 $17,963,767.00 Actual Expended $31,630,697.00 $17,206,534.00
GMP3 - Contract
Contractor Sundt
Award Date 9/21/2020
Construction NTP 9/22/2020
Duration (calendar days) 1704
Contracted Completion Date 5/23/2025
Total Original Contract Amount $379,880,747.00
Revised Contract Amount $383,790,833.00
Original Contingency Amount $13,900,000.00
Revised Contingency Amount $38,986,910.00
Forecast Completion Date 4/22/2026
Current Contracted Amount $411,681,871.00
Actual Expended $385,795,560.00
Current Period Activities
Project/Construction Management
• Coordinating the Special Inspections Services
• Providing Construction Inspection Services
• Reviewing and recommending approval of change orders
• Administering the Consultant and Subconsultants contracts • Assisting with the Startup and Commissioning training of Plant Staff • Monthly WWTP update meeting with Foster City management team.
October through December 2024 PAGE10
SAN MATEO CLEAN WATER PROGRAM QUARTERLY REPORT
Q4 2024
Engineering Design/ Services During Construction
• Interpretive Signage - Contractor is in the process of procuring the signage. • ESDC: HDR continued review of submittals and RFls on GMP 3; development of design change notices; onsite and remote support by Resident Engineer. HDR continuing the preparation of electronic Operations and Maintenance Manuals
Permitting:
Bay Area Air Quality Management District (BAAQMD)
A/C 30448 (Liquid Processes)
Because the A/C renewal request has been submitted, the City can continue construction/operation under the conditions of the existing permit until a new A/C permit is issued.
A/C 30449 (Generators)
Because construction is complete and source test data submitted, the City does not need to renew the A/C. The Source Test data was approved 10/26/23. The next step, issue the Permit to Operate (P/O). In the interim, the City can operate the generators under the conditions of the A/C permit.
Public Outreach
• PM/CM and the CWP Public Outreach Lead coordinated on regular project updates to the website, newsletter, social media, etc.
Construction
GMP1
• Project close out is almost completed.
GMP-2
• Project is closed out and accepted.
GMP-3
• The contracted completion date for GMP3 has been adjusted to May 22, 2025, to account However, the time was corporad addie cal actor ade procee ore retical panels required for programming the SCADA have been impacted by the supply change issues as a result of the Covid pandemic, leak testing of the basins took longer than originally planned, and the chemical piping system needs to be replaced to account for thermo- expansion and contraction. The project end date is now projected to be April 2026.
The Contractor and the City are working together to minimize the potential delays and reduce this potential completion date extension.
‹ Commissioning meetings were held to continue discussing start-up activities, including roles and responsibilities.
& Yard piping is complete except for final connection of the force mains to the Headworks schedule for June 2025.
• Continued to install Electrical ( conduit and wiring) and Mechanical Equipment (piping with structural supports) in Areas 51 (Headworks), and 55 (BNR.).
October through December 2024 PAGE11
SAN MATEO CLEAN WATER PROGRAM QUARTERLY REPORT
Q4 2024
• Admin Building and Warehouse are pending final approval from Building and Fire Departments and completion of the final punch list items.
• Continued improvements to the existing Sodium Hypochlorite Day and Bulk Storage Tanks, and pumping systems.
• Continued improvements to the existing Sodium Bisulfite Tanks and Pumping system. / Continued improvements to the existing Chlorine Contact Basins. • Parcel Map Recorded April 11, 2024
Next Period Activities
Project/Construction Management
• HDR's to continue to provide ESDC services including development of process 0&M manuals, process training, expanded discipline-specific Resident Engineer services, and related known scope reflected in the contingency budget.
Engineering Design/Services During Construction
• ESDC: HDR to continue to provide onsite resident engineering services.
Permitting
• Coordination with Building and Fire Departments for Temporary Occupancy for Admin Building and Warehouse
Public Outreach
• Provide project updates to the CWP Public Outreach Lead for monthly newsletter, website, and social media updates.
• Continue as-needed support in response to resident queries via the communication hotline.
Construction
GMP-1
• Close out project
GMP-2
• Completed.
GMP-3
• Continue to install Electrical (, conduit and wiring) and Mechanical Equipment (piping with structural supports,) in 55 (BNR)).
• Continue coordination with Building and Fire Department for Temporary Occupancy .for Admin. Building.
Work on final punch list items.
• Continue the improvements to the existing Sodium Hypochlorite and Sodium Bisulfite systems. • Continue improvements to the Chlorine Contact Basins
• Installation of Chemical piping in Area 70 (Chemical Area October through December 2024 PAGE12
SAN MATEO CLEAN WATER PROGRAM QUARTERLY REPORT
Q4 2024
Risks and Opportunities
• Cal Water's New Potable Water Main Extension: Completed • PG&E's New Primary Service: Completed
• Relocation of PG&E's Utilities from Detroit Drive: Completed Financial Status
Current update shows an overrun ($39.53M) of original budget.
Millions
Budget $532.71M
Actual Cost to date $527.89M
Estimate at Completion $577.36M
Schedule Status
• The current forecast as of November 2024, shows project completion to be in April 2026 October through December 2024 PAGE 13
SAN MATEO CLEAN WATER PROGRAM QUARTERLY REPORT
Q4 2024
46T009 |AP Package I|
Project Description:
Replace and repair aging infrastructure at the WWTP by adding Project Inside screening, flexibility, and redundancy for WWTP solids processes. The Project Manager Tyler Kirkendall project includes: (1) Mechanical bar screen and repair of concrete wall at Project Type Wastewater System the IJB; (2) Effluent PS #1 pumping and piping improvements; (3) replace Construction wo of the oldest pumps in PS #1; (4) Cake pumping system: add second Design Firr Stantec, HDR ake pumping system; and (5) Second cake hopper system: add a second cake hopper, slide gate, acces walkway, and platform.
IAP II - Contract
Current Period Activities Contractor Myers & Sons
Award Date 2/11/2019
Project/Construction Management Construction NTP 2/19/2019 • Coordinated City negotiations with Contractor for time Duration (calendar days) 848 extension / delays. Contracted Completion Date 6/14/2021 $6,340,000
Worked with Contractor on Cake pump issues. $1,144,000
Forecast Completion Date 4/16/2025
Engineering Design/ Services During Construction Current Contracted Amount $7,181,514 (Various) $7,166,014
• Stantec ESDC is ongoing through the remainder of its construction period.
Permitting
~ No activities this period.
Public Outreach
• No activities this period.
Construction
Immediate Action Projects, Package II (IAP II)
• Replaced the mitered pipes and added pipe supports
~ Replaced Sensors in Hopper.
Next Period Activities
Project/Construction Management
• Continued change management support.
Engineering Design and Engineering Services During Construction • Stantec ESDC is ongoing through the remainder of its construction period. • Aid in project Close out
Permitting
• No activities this period.
October through December 2024 Page 30
SAN MATEO CLEAN WATER PROGRAM QUARTERLY REPORT
Q4 2024
Public Outreach
• No activities this period.
Construction
Immediate Action Projects, Package II (IAP II)
Project is Substantially Complete.
Need to resolve outstanding change orders.
Risks and Opportunities
Project is Substantially complete. Need to resolve the potential Time Impact Analyst and associated costs.
Delays to the project by sludge cake pumping system resulted in significant delays to the project.
Financial Status
Current update shows an overrun ($5.72 M) of original budget.
Millions
Budget $13.02M
Actual Cost to date $13.44M
Estimate at
Completion $18.74M
Schedule Status
Project schedule temporary on hold while issues are being resolved. Anticipates construction to be completed by April 14, 2025
October through December 2024 P A GE E31
SAN MATEO CLEAN WATER PROGRAM QUARTERLY REPORT
Q4 2024
46T010 |AP Package III
Project Description:
Upgrade aging infrastructure and increase reliability for the effluent PS at Project Inside the WWTP. Improvements include perform hydraulic analysis on the Project Manager effluent PS and flow meters; replace MCCs P1, P2, P3, and P4 in the Wastewater System Main Structure Building; add variable-frequency drives (VFDs) and check Engineering valves on stormwater pumps; replace check valves (3) for dry weather pumps; replace MCCs/VFDs (4) and control panels (4) for dry weather pumps; and replace doors (3) and windows (10), repair roof, and add HVAC for the PS.
Current Period Activities
Project/Construction Management (Jacobs -Riva Mitra/Tanner Pacific) Project Bid opened on April 6, 2023
Project awarded to Mountain Cascade for $11,703,696
EAC revised to $17,797,113.
Project Management by Jacobs with assistance from the City Construction Management by Tanner Pacific
Engineering Design/ Services During Construction (HDR)
Review of Submittals and RFl's
Construction
Started construction of Site Waste Pump Station, Valve Vault and associated piping Started construction of the Effluent Pump Station expansion and associated piping Started replacements of the HVAC units and piping in the Solids Handling Building Started replacement of Digester 1 piping.
Completed structural repairs of concrete and installation of new windows in the Effluent Pump Station Building.
Completed Valve Replacement in the Effluent Pump Station Next Period Activities
Project/Construction Management (City/Tanner Pacific)
Construction Management by Tanner Pacific.
Engineering Design/ Services During Construction
• HDR to continue EDSC.
Construction
Continue construction of Site Waste Pump Station and Improvements to the Effluent Pump Station and associated piping
Complete replacement of Digester 1 and Digester 2 piping.
Start connection to the Effluent Pump Station discharge piping Complete the installation of the HVAC units in the Solids Handling Building Risks and Opportunities
Rescoping the project pushed out the completion date of the project.
October through December 2024 PAGE 34
SAN MATEO CLEAN WATER PROGRAM QUARTERLY REPORT
Q4 2024
Financial Status
contingencies are being used to offset this overrun. The current estimate is based on a defined scope of work. $2.47
Budget million
Actual Cost to $8.22
date million
Estimate at $17.80
Completion million
Schedule Status
Current forecast shows final completion in August 2025.
October through December 2024 PAGE 35
SAN MATEO CLEAN WATER PROGRAM QUARTERLY REPORT
Q4 2024
46T090 Annual Major Component WWTP
Project Description:
Maintain reliable plant operations to meet regulatory permit Project Inside requirements and repair and replace critical WWTP Project Manager Riva Mitra ntrastructure. The operations and maintenance team maintair Project Type Wastewater System in active list of potential projects that are implemented as fund: Phase Engineerina are available.
Current Period Activities
Project/Construction Management (Jacobs- Riva Mitra/ Tanner Pacific) • Jacobs to manage the Project Management with assistance from the City staff AMC project
• Update WWTP Biosolids and Energy Management Plan - Selected Brown and Caldwell plan to award November 2024. Study to be completed early 2026.
• Digester 1 Improvements - waiting for biosolids report to be completed. • Centrifuge and Centrifuge Feed Pump Replacement - preparing a request for proposal for the design of this project.
• Solids Handling Systems I&C Improvements - waiting for biosolids report to be completed. • Digester Transfer Pump Project - Awarded contractor currently procuring equipment. VFD's will arrive in February 2025, Project completion March 2025.
~ 3 Water Pumping Improvements - design ongoing anticipated start of construction summer 2025. • DAFT Corrosion Improvements - Study to evaluate alternatives to repairing DAFT was awarded to Carollo in November 2024. Study to be completed in March 2025.
• Digest 2 Mixer Repair/Replacement - SPX was awarded the repair of the mixer in September 2024. Mixer will take approximately 6 months to repair
Permitting (Various)
None
Construction
Digester Transfer Pump Project was awarded in November 2023. The contractor is currently procuring equipment. Minor electrical work has started/ VFDs are scheduled to arrive in February 2025.
Next Period Activities
Project/Construction Management (City/ Tanner Pacific)
• Continue CM on the Digester Transfer Pump Project
Engineering Design/ Services During Construction
• Design Consultants providing EDSC for the Digester Transfer Pump project. • Monthly WWTP update meeting with Foster City management team. for the AMC projects.
October through December 2024 PAGE 38
Permitting
• None
Construction
• Continue the Construction on the Digester Transfer Pump project with the procurement of the VFDs Risks and Opportunities
AMC 36 Centrifuge Conveyor Replacement will be part of the Centrifuge replacement project. Request for proposal for the design of this project is currently being prepared.
Financial Status
Project shows EAC over budget.by $4.72 million The original budget was an estimate to be used as a place holder that was set prior to having any knowledge of the project scope of work. The overall program carried a large contingency to compensate for this unknown and a portion of those contingencies are being used to offset this overrun. The current estimate is based on a defined scope of work.
Millions
Budget $8.92
Actual Cost to date $2.13
Estimate at Completion $13.64
Schedule Status
• AMC 6 +23 was completed in November 2022.
MC Digester 2 Mixer Repair/Replace, Awarded to SPX in September 2024; will take approximately 6 to onths Digester 2 will be offline until the repair is completec • AMC Digester Transfer Pump was awarded in November 2023. Contractor has begun minor electrical work but VFDs will not arrive until February 2025. Scheduled to be completed in March 2025... • All other AMC projects are in the design or predesign phase.
October through December 2024 PAGE 39
SAN MATEO CLEAN WATER PROGRAM QUARTERLY REPORT
Q4 2024
Completed Projects
Wastewater Treatment Plant Projects
Updated to latest values from EDEN (January 2020)
Finish
Name Start Date Date Actual Cost
469948: SCADA Immediate Projects: Phase 2 (IAP) 1/2/2015 11/25/2015 $1,524,717 469962: Short-Term MCC Replacement Project (IAP) 1/2/2015 11/25/2015 $49,628 469973: Secondary System: Immediate Projects: SCs 1-4 and return- 1/2/2015 11/25/2015 $426,918 activated sludge Pump Values (IAP)
469975: Solids: Immediate Projects: GT 182 (IAP) 1/2/2015 11/25/2015 $372,358 469976: Immediate Projects: Boiler Replacement 1/2/2015 4/29/2016 $475,296 469978: Solids Building: Immediate. Projects: Centrifuge Hoist Project (IAP) 1/2/2015 11/25/2015 $2,410 46T002 IAP Package | 8/1/2018 8/28/19 $18,621,868
TOTAL $21,472,951
October through December 2024 PAGE 40