HomeMy WebLinkAbout18.a. Committee Minutes-Engineering & Operations 08-31-2022 Page 1 of 12
Item 18.a.
CENTRALSAN
jdf A- hom
CENTRAL CONTRA COSTA SANITARY DISTRICT
September 15, 2022
TO: HONORABLE BOARD OF DIRECTORS
FROM: KATIE YOUNG, SECRETARYOF THE DISTRICT
SUBJECT: AUGUST 31, 2022 - ENGINEERING & OPERATIONS COMMITTEE - CHAIR
LAURITZEN AND MEMBER HOCKETT
Attached are minutes of the above Committee meeting.
ATTACHMENTS:
1. Minutes of 08-31-22 meeting
2. (Handout) Presentation from meeting
September 15, 2022 Regular Board Meeting Agenda Packet- Page 86 of 104
Page 2 of 12
CENTRAL SAN
CENTRAL CONTRA COSTA SANITARY DISTRICT 5019 IMHOFF PLACE, MARTINEZ, CA 9A553-437
REGULAR MEETING OF THE BOARD oFDIRECTORWILLIAM
DAVID R. WILLIAMS
CENTRAL CONTRA COSTA Preen`
SANITARY DISTRICT BARBARA D.H°CKETT
President Pro Tem
ENGINEERING & OPERATIONS MARIAHN.LAURITZEN
COMMITTEE MICHAEL R.MCGHL
TAD J PILECKI
MINUTES PHONE: (925)228-9500
FAX.- (925)372-0192
Wednesday, August 31 , 2022 www.centralsan.org
11:00 a.m.
(All attendees participated via videoconference)
Committee:
Chair Mariah Lauritzen
Member Barbara Hockett
Guest:
Dolly Chen, HDR (joined during Item 4.a.; left after Item 4.b.)
Staff.-
Roger S. Bailey, General Manager (joined during Item 4.a.)
Katie Young, Secretary of the District
Philip Leiber, Director of Finance and Administration (joined during Item 4.a.)
Steve McDonald, Director of Operations
Danea Gemmell, Planning and Development Services Division Manager (joined during Item 4.a.)
Edgar Lopez, Capital Projects Division Manager
Sasha Mestetsky, Senior Engineer (left during Item 4.b.)
Keith Gellerman, Associate Engineer
Amelia Berumen, Assistant to the Secretary of the District
1. Notice
This meeting was conducted virtually in accordance with the provisions stipulated
in Assembly Bill 361 and adopted on August 4, 2022 by the Central San Board of
Directors. The agenda included instructions for options in which the public could
participate in the meeting.
2. Call Meeting to Order
Chair Lauritzen called the meeting to order at 11.00 a.m.
September 15, 2022 Regular Board Meeting Agenda Packet- Page 87 of 104
Page 3 of 12
Engineering & Operations Committee Minutes
August 31, 2022
Page 2
3. Public Comments
No public comments.
4. Agenda Items
a. Review draft Position Paper to (1) award a construction contract in the
amount of $27,606,000 to C. Overaa & Co., the lowest responsive and
responsible bidder, for the Pump Station Upgrades, Phase 2A, District
Project 8457; (2) authorize the General Manager to amend three existing
professional engineering services agreements to include construction
support with the following consultants in amounts not to exceed:
• Carollo Engineers, Inc. for $1.8 million, increasing the agreement to
$2 million;
• HDR, Inc. for $600,000, increasing the agreement to $790,000; and
• ArcSine Engineering, Inc. for $500,000, increasing the agreement to
$650,000; and
(3) find the Project is exempt from the California Environmental Quality Act
Mr. Gellerman presented the Committee with an informative overview of
the project information provided in the agenda materials.
Phase 2 of the Pump Station Upgrades project originally included all three
of the `pump station chain'in Martinez; however, after a thorough review
of the project drivers, a decision was made to split the project into two
separate bid packages for contractor interest. In addition to various pump
station improvements to the Fairview and Maltby Pump Station locations,
Phase 2A will also improve electrical safety and access components.
Additionally, the two pump stations in Phase 2A were designed to be `twin
stations'that will aid with maintenance reliability. Phase 28 will address
the Martinez Pump Station improvements separately.
In response to a question posed by Member Hockett, a discussion ensued
about sea level precautions and a technical overview of gravity system
flows. Staff shared that HDR conducted a study of future sea level rise
and floods, this study was used for the project design. It was explained
that the bottom of the Fairview Pump Station will be below sea level while
the top of the station will be significantly above sea level, the electrical
gear is situated even higher.
The Maltby Pump Station, situated near Pacheco Creek, is being built to
resist a flood and the top of the station will be ten feet above sea level.
A 2018 flood report determined that the Maltby Pump Station area could
become flooded with water during a large storm event, a significant issue
that would render the station useless with electrical gear damage. This
project will include a unique design for the construction of a flood wall and
September 15, 2022 Regular Board Meeting Agenda Packet- Page 88 of 104
Page 4 of 12
Engineering & Operations Committee Minutes
August 31, 2022
Page 3
gate. The flood gate will have a buoy system that will seal-off the pump
station for protection.
In response to Chair Lauritzen's inquiry of other flood gate technology in
the collection system, staff responded this project will be the first and the
first experience with the aforementioned flood wall.
Mr. Lopez stated the bids were lower than expected. Some higher costs
attributed to supply chain challenges, especially electrical gear, were
experienced on other projects and were anticipated. He commended the
extensive contractor outreach conducted by Mr. Gellerman for contractor
interest for this project.
Staff responded to other questions to the Committee's satisfaction.
Chair Lauritzen thanked staff for reviewing the project in depth to reduce
costs.
COMMITTEE ACTION: Recommended Board approval.
b.* Review draft Position Paper to authorize the General Manager to amend
four existing professional engineering services agreements under the
Solids Handling Facility Improvements, Phase 1A project for additional
design and bidding services with the following consultants in amounts not
to exceed:
• CDM Smith, Inc. for $550,000, increasing the agreement to
$1,400,000;
• GHD, Inc. for $200,000, increasing the agreement to $700,000;
• ArcSine Engineering, Inc. for $200,000, increasing the agreement to
$800,000; and
• HDR, Inc. for$200,000, increasing the agreement to $350,000
Mr. Lopez provided a presentation to the Committee to highlight the various
components of this request and a project status (attached).
In general, Mr. Lopez noted that various processing equipment have
exceeded industry standards for replacement, such as the cake pumps,
centrifuges, corrosion of the sludge blending tank cover, and incinerators -
an ongoing issue and challenge to obtain spare parts. Staff is looking to
improve the system's reliability, especially to continue operations and meet
regulatory needs for many years. The project will also include seismic
improvements to the Solids Conditioning Building. Mr. Lopez emphasized
these components need to keep operating, even if the District's solids
processing protocols change in the next 50 years.
Bid documents — as part of the redesign of the project, staff ran into items
that required additional design efforts that were not known at the time of
the original project bid last year. Updates included the wet scrubber system
September 15, 2022 Regular Board Meeting Agenda Packet- Page 89 of 104
Page 5 of 12
Engineering & Operations Committee Minutes
August 31, 2022
Page 4
for safety and reliability reasons, and other proactive measures for
regulatory components in the future. Additionally, a flooding concern
attributed to the wet scrubber system was reevaluated and reconciled.
Lastly, staff spent time engaging with prior bidders to evaluate what could
be improved, one outcome was an improvement to the project sequencing.
ArcSine created new designs for many scope items and was able to
salvage approximately 50% of the original design. Mr. Lopez anticipates
these various design improvements will save construction dollars later.
The Phase 1A project has been coordinated with the Phase 2 Solids
project, which is moving along. Some key items to note is it will take time
to implement any changes (i.e., permitting and building in today's
environment) as the existing systems need to remain in service but are
past their useful life. Phase 1A will improve items which need to be
replaced and coordinated for the next phase.
The recommended Board actions will get staff through the bid period, any
engineering services during construction amendments will be requested
later, as needed.
Member Hockett inquired where the scrubber water will enter the plant.
Mr. Lopez responded the scrubber water is directed to the aeration tanks
but may be directed to the Headworks as influent flow as needed. He
explained the scrubber water quality would not have any adverse impacts
to the system, which was validated through a pilot program.
COMMITTEE ACTION: Recommended Board approval.
5. Announcements
None.
6. Suggestions for Future Agenda Items
a. Receive list of upcoming agenda items and provide suggestions for any
other future agenda items
COMMITTEE ACTION: Received the list.
7. Future Scheduled Meetings
Wednesday, September 14, 2022 at 11:00 a.m.
Tuesday, October 11, 2022 at 11:00 a.m. (Special)
Wednesday, November 2, 2022 at 11:00 a.m.
8. Adjournment— at 11:51 a.m.
* Attachment
September 15, 2022 Regular Board Meeting Agenda Packet- Page 90 of 104
Page 6 of 12
Item 4.b.
(Handout)
August 31,2022
SOLIDS HANDLING FACILITY
IMPROVEMENTS, PHASE 1A
DISTRICT PROJECT 7348
STATUS UPDATE AND
RECOMMENDED ACTIONS
Engineering and Operations
Committee
Edgar J.Lopez,P.E.
i
Capital Projects Division Manager 1 J
Nathan Hodges,P.E.
Senior Engineer
1
Agenda
1 Background and Drivers
2. Design Status
3. Bid Schedule
4. Project Estimate and Budgets
5. Recommendations
September 15, 2022 Regular Board Meeting Agenda Packet- Page 91 of 104 1
Page 7 of 12
Background and Drivers
ftftw-
Mimi
1 2 3 4 5 6&7
Background o
Staff recommended to
reject all bids for Phase 1.
Total estimated project
cost of $261,373,000.
0 O O G 0 O
MODIFY MULTIPLE NEW ASH AIR POLLUTION CENTRIFUGE ELECTRICAL SOLIDS CONDITIONING
SLUDGE HEARTH HANDLING CONTROL DEWATERING SYSTEMS BUILDARETROIIT
BLENDING/ FURNACES AND LOADOUT (NEW WET SYSTEM
STORAGE (AND SEISMIC) SCRUBBERS)
-rs
September 15, 2022 Regular Board Meeting Agenda Packet- Page 92 of 104 2
Page 8 of 12
Drivers for Phase 1A (reduced scope)
61
.} ,
wadi
Project Drivers
End of Life Assets, Regulatory, Reliability & _--
Sustainability �-
r
New air pollution control equipment to meet air
regulations today and in the future
Cake pumps and centrifuge is beyond useful life
Sludge blending tank cover needs replacement
due to significant corrosion
Incineration burners beyond useful life and
replacement parts are extremely rare to get
Improvements needed to keep solids process
reliable for 15+years
Seismic improvements for safety and
sustainability of the Solids Conditioning Building
YI.
September 15, 2022 Regular Board Meeting Agenda Packet- Page 93 of 104 3
Page 9 of 12
Design Status
Design Status
Consulting team:
CDM Smith, Inc. (Lead, model, overall construction sequence and
mechanical systems)
GHD, Inc. (Incinerator and air pollution control equipment)
ArcSine Engineering (Electrical and lead controls designer)
HDR Engineering, Inc. (Structural and Architectural)
Degenkolb Engineers (Seismic Designer )
hkahow,
September 15, 2022 Regular Board Meeting Agenda Packet- Page 94 of 104 4
Page 10 of 12
Design Status
Preparing bid documents, technical specifications and drawings
Additional design required and recommended by staff, such as:
Modifications to the new wet scrubber system for reliability and
safety; and improved design for future modifications, if required
More focus on improving project for constructability, equipment
delays, realistic sequencing, and contract provisions
Improved electrical, controls, and instrumental plans, and
coordinated with all other disciplines
Important Note: Design Team coordinated scope with Phase 2
ums, MJ
Project for long term solids alternatives.
Bid Schedule
Final design completed in Bid Project
November 2022 » »
Bid Period December— March
2023
lulmit Final
Tentative bid opening April 2023 « SRF Loan Budget
Amount Amendment«
SRF Review then Award (within Finalized Package
120 days from bid opening)
September 15, 2022 Regular Board Meeting Agenda Packet- Page 95 of 104 5
Page 11 of 12
Project Estimate and Budgets
Overall design costs (Phase 1 and 1A) - $21,000,000 (SRF Reimbursed)
Construction Contract (Engr. Estimate) - $90,000,000
Seismic Improvements - $20,000,000
Project Contingency - $16,000,000
Construction Management - $22,000,000
Total Estimated Project Costs - $169,000,000
Fiscal Year 2022-23 Budget and CIP - $168,000,000
SRF Authorized Agreement to date - $173,100,000
Recommendations
alai
September 15, 2022 Regular Board Meeting Agenda Packet- Page 96 of 104 6
Page 12 of 12
Recommended Board Actions
Staff recommends the following:
Authorize the General Manager to amend four existing professional engineering
services agreements under the Solids Handling Facility Improvements, Phase 1A for
additional design and bidding services with the following consultants at a cost not to
exceed:
a. CDM Smith, Inc. for $550,000, increasing the agreement to $1,400,000;
b. GHD, Inc. for$200,000, increasing the agreement to $700,000;
C. ArcSine Engineering, Inc. for $200,000, increasing the agreement to
$800,000; and
d. HDR Engineering, Inc. for $200,000, increasing the agreement to $350,000.
1
QUESTIONS
l _
September 15, 2022 Regular Board Meeting Agenda Packet- Page 97 of 104 7