DEPARTMENT
Infrastructure Division
AGENDA NO.
6g
MEETING DATE
January 9, 2024
AGENDA ITEM
Public Utilities Commission
City and County of San Francisco
Calendar: Consent Calendar
Project Manager: Alisha Reinhardt
Approve Increase to Construction Duration Contingency for Contract No. WD-2871, Sunol Valley Water Treatment Plant and Chloramination Facility Aqua Ammonia Structural Repairs and Tank Replacement
Summary of Proposed
Commission Action:
Approve a 120 calendar day increase to the Contract duration contingency for Contract No. WD-2871, Sunol Valley Water Treatment Plant and Chloramination Facility Aqua Ammonia Structural Repairs and Tank Replacement with Cal State Constructors , for a new C ontract duration limit of up to 841 consecutive calendar days (approximately two years and four months), to allow for procurement of new valve actuators that include position indicators similar to existing valves, with no change to the C ontract amount.
Background: In 2018, Staff performed a s eismic assessment of the Sunol Valley Water Treatment Plant and Chlor amination Facility , which supports water distribution and delivery in the East Bay. As a result of the assessment, Staff determined that the aqua ammonia tank supports and appurtenant structural elements at the S unol Valley Water Treatment Plant and S unol Valley Chloramination Facility required repairs and replacement to ensure structural reliability and adherence to l evel of s
ervice goals associated with seismic
reliability and as required by Alameda County. Staff also determined that replacement of the existing aqua ammonia tanks was necessary to ensure that the San Francisco Public Utilities Commission ( SFPUC) continues to meet its water quality level of service goals.
On November 9, 2021, by Resolution No. 21 -0167, this Commission awarded WD-2871, Sunol Valley Water Treatment Plant and Chloramination Facility Aqua Ammonia Structural Repairs and Tank Replacement, to Cal State Constructors . The original C ontract amount was $1,769,014, and the original Contract duration was 547 consecutive calendar days.
On March 14, 2023, by Resolution No. 23- 0054, this Commission approved an increase to the existing C ontract cost contingency of $250,000 and an increase to the existing C ontract duration contingency of 120 calendar day s for hazardous waste clean up and disposal of the existing aqua ammonia tanks and to install additional davit arms and platform ladders for safe access as well as for delays associat ed with fabrication of new stainless steel aqua Agenda Title: WD-2871, Sunol Valley Water Treatment Plant and Chloramination Facility Aqua Ammonia Structural Repairs and Tank Replacement
Commission Meeting Date: January 9, 2024
ammonia tanks, for a total Contract amount of up to $ 2,195,915, and a total Contract duration of up to 721 consecutive calendar days.
Scope of Contract: The Contract work location is in Sunol, California at the Sunol Valley Water Treatment Plant and Chloramination Facility.
The Contract work consists of furnishing and installing:
• Aqua ammonia chemical storage tanks;
• Ultrasonic level sensors;
• Vacuum breaker valve assemblies;
• Electrically actuated ball valves;
• Ammonia gas detection and alarm system;
• City-furnished tuning fork density meter;
• Modifications to Alameda Siphon No. 1 aqua ammonia injection vault; and
• Overhead canopy structure upgrades.
Modifications to the
Contract:
Modification Nos. 1 - 3: The SFPUC modified the Contract within the approved contingenc ies for cost and duration , increasing the Contract amount by $286,989 and increasing the C ontract duration by 120 consecutive calendar days for a revised Contract amount of $2,056,003 and a revised Contract duration of 667 consecutive calendar days.
Recommended Increase to Contract Duration Contingency:
Staff recommends that the Commission approve an increase to the Contract duration contingency by 120 calendar days to procure new actuators for the valves that include position indicators similar to the existing valve actuators for a tot al Contract duration limit of up to 841 consecutive calendar days , with no change to the Contract amount.
Funding and Costs: Funding Source: Project No. 10036522, East Bay Field R&R / 10015061, SVWTP & East Bay Fields / 10032938, Sunol PAC Units / 10036524, SVWTP R&R / 10029996, Water Treatment
Original Contract Amount: $1,769,014
Original 10% Cost Contingency: $176,901
Approved Increase to Cost Contingency: $250,000
Requested Additional Cost Contingency: $0
Total Contract Cost Limit: $2,195,915
Schedule: Notice-to-Proceed Date: March 7, 2022
Original Contract Duration: 547 consecutive calendar days Original 10% Duration Contingency: 54 calendar days
Approved Increase to Duration Contingency: 120 calendar days Recommended Additional Duration Contingency: 120 calendar days Total Contract Duration Limit: 841 consecutive calendar days
Agenda Title: WD-2871, Sunol Valley Water Treatment Plant and Chloramination Facility Aqua Ammonia Structural Repairs and Tank Replacement
Commission Meeting Date: January 9, 2024
Environmental Review: This action does not constitute a “project” under California Environmental Quality Act Guidelines Section 15378(a) because there would be no physical change in the environment.
Local Business
Enterprise
Participation and Non-
Discrimination In
Contracting:
The Contract Monitoring Division established a 9% Local Business Enterprise (LBE) subcontracting requirement for this C ontract. The Contractor committed to 19.01% LBE participation with its bid submittal.
Agenda Title: WD-2871, Sunol Valley Water Treatment Plant and Chloramination Facility Aqua Ammonia Structural Repairs and Tank Replacement
Commission Meeting Date: January 9, 2024
PUBLIC UTILITIES COMMISSION
City and County of San Francisco
RESOLUTION NO.
WHEREAS, Following a seismic assessment, San Francisco Public Utilities Commission (SFPUC) staff determined that repairs and replacement of its Sunol Valley Water Treatment Plant and Chloramination Facility was necessary to support its water delivery system and water quality level of s ervice goals associated with seismic reliability and as required by Alameda County; and
WHEREAS, On November 9, 2021, by Resolution No. 21- 0167, the Commission awarded Contract No. WD-2871, Sunol Valley Water Treatment Plant and Chloramination Facility Aqua Ammonia Structural Repairs and Tank Replacement to Cal State Constructors; and WHEREAS, The original C ontract amount was for $1,769,014 and the original Contract duration was 547 consecutive calendar days; and
WHEREAS, March 7, 2022 was the construction Contract Notice-to-Proceed date; and WHEREAS, On, March 14, 2023, by Resolution No. 23-0054, the Commission approved an increase of $250,000 to the Contract cost contingency, for a total contract amount limit of up to $2,195,915, and an increase of 120 calendar days to the C ontract duration contingency, for a total Contract duration limit of up to 721 consecutive calendar days; and WHEREAS, Modification Nos. 1- 3 increased the Contract amount by $286,989 and the Contract duration by 120 consecutive calendar days, in accordance with Resolution No. 23-0054, for a revised Contract amount of $2,056,003 and a revised Contract duration of 667 consecutive calendar days; and
WHEREAS, Staff recommends a 120 calendar day increase to the Contract duration contingency for the procurement of new actuators that include position indicators similar to the existing valve actuators; and
WHEREAS, C ontract Monitoring Division established a Local Business Enterprise (LBE) subcontracting participation of 9% for this C ontract, and the C ontractor committed to
19.01% LBE participation with its bid submittal; and
WHEREAS, This action does not constitute a “project” under California Environmental Quality Act Guidelines Section 15378(a) because there would be no physical change in the environment; now, therefore, be it
RESOLVED, That this Commission hereby approves an increase of 120 calendar days to the existing C ontract duration contingency for Contract No. WD -2871, Sunol Valley Water Treatment Plant and Chloramination Facility Aqua Ammonia Structural Repairs and Tank Replacement, for a total Contract duration contingency limit of up to 29 4 calendar days and a new Contract duration up to 841 consecutive calendar days , with no change to the C ontract amount.
I hereby certify that the foregoing resolution was adopted by the Public Utilities Commission at its meeting of January 9, 2024.
Secretary, Public Utilities Commission