Progress Through: September 30, 2024
Quarterly Progress Report
San Mateo Clean
Water Program
for the
Wastewater
Treatment Plant
Projects
3rd Quarter Report July 1, 2024
to September 30, 2024
Submitted on: October 21, 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 infrastructure, provide capacity for wet weather flows, comply with regulatory requirements, enhance reliability, and produce a higher quality effluent that meets current and future permit requirements and Title 22 recycled water quality. Producing a higher quality effluent will enable the City to develop a water reuse Program.
GMP3 – Contract
Contractor Sundt
Award Date 9/21/2020
Construction NTP 9/22/2020
Duration (calendar days) 1584
Contracted Completion Date 1/23/2025
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 10/23/2025
Current Contracted Amount $407,751,364.23
Actual Expended $378,195,689.71
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.
July through September 20 24 P A G E 10
SAN MATEO CLEAN WATER PROGRAM
QUARTERLY REPORT
Q3 2024
Project Inside
Project Manager Leswin DCunha
Project Type Wastewater System
Phase Construction
GMP1 – Contract
Contractor Sundt
Award Date 5/6/2019
Construction NTP 6/4/2019
Duration (calendar days) 1124
Contracted Completion Date 7/1/2022
Total Original Contract Amount $33,098,178.00
Contingency Amount $1,725,000.00
Substantial Completion Date 2/1/2023
Current Contracted Amount $34,783,550.00
Actual Expended $31,630,697.00
GMP2 – Contract
Contractor Sundt
Award Date 5/4/2020
Construction NTP 5/5/2020
Duration (calendar days) 619
Contracted Completion Date 01/14/2022
Total Original Contract Amount $17,716,049.00
Contingency Amount $1,645,000.00
Acceptance Date 3/6//2024
Current Contracted Amount $17,963,767.00
Actual Expended $17,206,534.00
Engineering Design/ Services During Construction
• Interpretive Signage -:Contractor is in the process of procuring the signage. • ESDC: HDR continued review of submittals and RFIs 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 March 26,2025 to account for additional time to incorporate additional scope added for the back-up fuel system.
However, the City was informed by the contractor that the procurement of the electrical panels required for programming the SCADA have been impacted by the supply change issues as a result of the Covid pandemic, and the leak testing of the basins took longer than originally planned, the project end date is now projected to be October 2025. The Contractor and the City are working together to minimize the potential delays and reduce this potential completion date extension. The Contractor and the City are also discussing the responsibility of the Contractor in covering the increase in management costs as a result of this schedule change.
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 January 2025.
Continued to install Electrical (gear including cabinets, breakers, switches, conduit and wiring) and Mechanical Equipment (piping with structural supports, motors and pumps),53 (Bio- Actiflo), 55 (BNR) and 56 (MBR).
July through September 2024 P A G E 11
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QUARTERLY REPORT
Q3 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 O&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 (gear including cabinets, breakers, switches, conduit and wiring) and Mechanical Equipment (piping with structural supports, motors and pumps) in Areas 53 (Bio-Actiflo), 55 (BNR) and 56 (MBR).
Continue coordination with Building and Fire Department for Temporary Occupancy .for Admin. Building.
Work on final punch list items.
Continue coordination with Building and Fire Department for Temporary Occupancy .for Warehouse. 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
July through September 2024 P A G E 12
SAN MATEO CLEAN WATER PROGRAM
QUARTERLY REPORT
Q3 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 $532.71
Actual Cost to date $19.952
Estimate at Completion $572.24
Schedule Status
T he current forecast as of September 2024, shows project completion to be in October 2025.
July through September 2024 P A G E 13
SAN MATEO CLEAN WATER PROGRAM
QUARTERLY REPORT
Q3 2024
46T009 IAP Package II
Project Description:
Replace and repair aging infrastructure at the WWTP by adding screening, flexibility, and redundancy for WWTP solids processes. The project includes: (1) Mechanical bar screen and repair of concrete wall at the IJB; (2) Effluent PS #1 pumping and piping improvements; (3) replace two of the oldest pumps in PS #1; (4) Cake pumping system: add second cake pumping system; and (5) Second cake hopper system: add a second cake hopper, slide gate, access walkway, and platform.
Current Period Activities
Project/Construction Management
• Coordinated City negotiations with Contractor for time extension / delays.
Worked with Contractor on Cake pump issues.
Engineering Design/ Services During Construction
(Various)
• 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 one of the mitered pipes and added pipe supports, Analyzing if additional measures to resolve the pressure issue are needed.
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. Continue review of submittals and RFI.
Permitting
No activities this period.
July through September 2024 Page 35
SAN MATEO CLEAN WATER PROGRAM
QUARTERLY REPORT
Q3 2024
Project Inside
Project Manager Tyler Kirkendall
Project Type Wastewater System
Phase Construction
Design Firm Stantec, HDR
IAP II – Contract
Contractor Myers & Sons
Award Date 2/11/2019
Construction NTP 2/19/2019
Duration (calendar days) 848
Contracted Completion Date 6/14/2021
Contract Amount $6,340,000
Contingency Amount $1,144,000
Forecast Completion Date 1/21/2025
Current Contracted Amount $7,167,599
Actual Expended $7,142,099
Public Outreach
No activities this period.
Construction
Immediate Action Projects, Package II (IAP II)
Analyze if additional measures such as a polymer ring is needed in order to resolve the pressure issue.
Risks and Opportunities
Sludge Cake Hopper No. 1 has not successfully completed start-up testing. Contractor working to identify issue affecting Cake Pump No. 1 and requested both design engineer and Vendor assistance in their troubleshooting of Cake Pump No. 1. Design Engineer provided new sludge cake measurement technology selection in DC 8, which was issued to the Contractor in September. City contracted with a third party to provide recommendations for fixing the Cake pump. The third party has recommended removal of welded pipe and installation of new piping. The contractor has replaced the miter welded pipe for one of the pumps and added pipe supports. Analysis is ongoing to determine if additional measures are needed. Delays to the project by sludge cake pumping system will result in significant delays to the project.
Financial Status
Current update shows an overrun ($5.73 M) of original budget.
Millions
Budget $13.02
Actual Cost to date $13.27
Estimate at
Completion
$18.68
Schedule Status
Project schedule temporary on hold while issues are being resolved. Anticipat es construction to be completed by April 14 , 2025
July through September 2024 P A G E 36
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QUARTERLY REPORT
Q3 2024
46T010 IAP Package III
Project Description:
Upgrade aging infrastructure and increase reliability for the effluent PS at the WWTP. Improvements include perform hydraulic analysis on the effluent PS and flow meters; replace MCCs P1, P2, P3, and P4 in the Main Structure Building; add variable-frequency drives (VFDs) and check 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 $17,711,486.
Project Management by Jacobs with assistance from the City Construction Management by Tanner Pacific
Engineering Design/ Services During Construction (HDR)
Review of Submittals and RFI’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 in the Solids Handling Building Started replacement of Digester 1 piping.
Completed structural repairs of concrete 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 piping.
Start connection to the Effluent Pump Station discharge piping Complete the installation of the HVAC units in the Solids Handling B7uilding Risks and Opportunities
Rescoping the project pushed out the completion date of the project.
July through September 2024 P A G E 39
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QUARTERLY REPORT
Q3 2024
Project Inside
Project Manager TBD
Project Type Wastewater System
Phase Engineering
Financial Status
The current update shows an overrun ($16.17 M) of the original budget. 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.
Budget
$2.47
million
Actual Cost to
date
$5.92
million
Estimate at
Completion
$18.64
million
Schedule Status
Current forecast shows final completion in May 2025.
July through September 2024 P A G E 40
SAN MATEO CLEAN WATER PROGRAM
QUARTERLY REPORT
Q3 2024
46T090 Annual Major Component WWTP
Project Description:
Maintain reliable plant operations to meet regulatory permit requirements and repair and replace critical WWTP
infrastructure. The operations and maintenance team maintain an active list of potential projects that are implemented as funds 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 late 2025.
Digester 1 Improvements - waiting for biosolids report to be completed. Centrifuge and Centrifuge Feed Pump Replacement - waiting for biosolids report to be completed. 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 December 2024, 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 will be awarded to Carollo in October 2024.
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 December 2024.
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.
July through September 2024 P A G E 43
SAN MATEO CLEAN WATER PROGRAM
QUARTERLY REPORT
Q3 2024
Project Inside
Project Manager Riva Mitra
Project Type Wastewater System
Phase Engineering
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 is on hold.
Financial Status
Project shows EAC over budget.by $4.23 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 $1.91
Estimate at Completion $13.15
Schedule Status
AMC 6 +23 was completed in November 2022.
AMC Digester 2 Mixer Repair/Replace, Awarded to SPX in September 2024; will take approximately 6 months Digester 2 will be offline until the repair is completed. AMC Digester Transfer Pump was awarded in November 2023 .Contractor has begun minor electrical work but VFDs will not arrive until December 2024. Scheduled to be co0mpleted in March 2025... All other AMC projects are in the design or predesign phase.
July through September 2024 P A G E 44
Completed Projects
Wastewater Treatment Plant Projects
Updated to latest values from EDEN (January 2020)
Name
Start Date
Finish
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- activated sludge Pump Values (IAP)
1/2/2015 11/25/2015 $426,918
469975: Solids: Immediate Projects: GT 1&2 (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 I 8/1/2018 8/28/19 $18,621,868
TOTAL $21,472,951
July through September 2024 P A G E 45
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QUARTERLY REPORT
Q3 2024