Sunnyvale Cleanwater
Program:
Secondary Treatment, Thickening and
Dewatering Bid Award
CITY COUNCIL MEETING
November 1, 2022
2City of Sunnyvale – City Council Meeting – November 2022 Project Drivers
3City of Sunnyvale – City Council Meeting – November 2022 Challenges with Existing Secondary
Treatment System
• Ability to meet future
Nitrogen limits.
• Aging Pond Infrastructure.
• Pond Solids Management.
• Deteriorating Pond
Levees.
4City of Sunnyvale – City Council Meeting – November 2022 Challenges with Existing Secondary Treatment
System
• Pond System becoming more
unreliable
• Permit Compliance -
TSS/Turbidity Limits
• Chemical Management -
Polymer Usage & Cost
• Recycled Water Production
5City of Sunnyvale – City Council Meeting – November 2022 Advantages of Conventional Activated Sludge System
• Removes more nutrients and
other material.
• Performance is reliable and
consistent year-round.
• Enables high-quality recycled
water production.
• Modular; more practical to
maintain.
• Can be expanded, upgraded,
and optimized later.
6City of Sunnyvale – City Council Meeting – November 2022 Primary
Tertiary
Solution: Split Flow
Secondary
7City of Sunnyvale – City Council Meeting – November 2022 Project Elements
8City of Sunnyvale – City Council Meeting – November 2022 • NTP1 Submittals, supplemental site investigation
• NTP2 Most construction
• NTP3 Thickening|Dewatering Building and
surrounding area
Project Schedule
2022 2023 2024 2025 2026 2027
NTP1
11/1/2022
NTP2
7/1/2023
NTP3
4/1/2024
Substantial
Completion
3/24/2027
4/23/2027
Final Completion
9City of Sunnyvale – City Council Meeting – November 2022 Bids Opened August 24, 2022
Bid Results
Three Bids Received:
Walsh Construction
Company ($277,872,751)
Kiewit Infrastructure
West Co. ($301,058,810)
Flatiron West
($358,852,015)
10City of Sunnyvale – City Council Meeting – November 2022 Recommended Award of Bid for Secondary Treatment,
Thickening and Dewatering Project
Bid Total $277,872,751
7% Contingency $ 19,451,093
Bid Award
11City of Sunnyvale – City Council Meeting – November 2022 Carollo Engineers
Engineering Services During Construction (ESDC)
Amendment
• Increase ESDC existing
contract by $6,889,452
• 10% contingency of
$688,945
12City of Sunnyvale – City Council Meeting – November 2022 Psomas
Construction Management (CM) Amendment
• Increase existing CM
contract by
$16,650,467
• 10% contingency of
$1,665,046
13City of Sunnyvale – City Council Meeting – November 2022 • Execute the Mobile Modular Lease Agreement for
payment of $368,583
Mobile Modular Lease Agreement
14City of Sunnyvale – City Council Meeting – November 2022 Program Environmental Impact Report
• Accept CEQA
addendum to
previously certified
Program Environmental
Impact Report
15City of Sunnyvale – City Council Meeting – November 2022 Funding Sources
• Low Interest Loans
Federal EPA Water Infrastructure Financing and
Innovation Act (WIFIA) - $220.6 M @ 1.56%
California Clean Water State Revolving Fund Loan
(CWSRF) - $301 M @ 1.6%
• Funded by Wastewater Rates
• Current rates projected at 3% to 4% per year
• Revised rates will be 2% to 6% per year higher for 3-6 years to address cost escalation
16City of Sunnyvale – City Council Meeting – November 2022 Budget Modification No. 5
• Project will spend over multiple years
• Budget Modification addresses total twenty-year
Budget
• Detailed allocation to be included in FY 2023/24
Recommended Budget
Current Increase Revised
Project 833210 -
Secondary Treatment
$274,259,178 $64,902,241 $339,161,419
831470 - Construction
Management
$35,566,001 $18,315,514 $53,881,515
17City of Sunnyvale – City Council Meeting – November 2022 • Award the Construction Contract to Walsh Construction Company • Approve a 7% Construction Contingency
• Amend Contract for Engineering Services During Construction (ESDC) with Carollo Engineers
• Approve a 10% ESDC Contingency
• Amend Contract for Construction Management (CM) with Psomas • Approve a 10% CM Contingency
• Accept the addendum to the previously certified Program Environmental Impact Report for the Sunnyvale Water Pollution Control Plant Master Plan • Execute the Mobile Modular Lease Agreement
• Approve Budget Modification
Staff Recommendation
QUESTIONS?
CITY COUNCIL MEETING
November 1, 2022