HomeMy WebLinkAbout03.d. Construction Contract with C. Overaa & Co. for $121,738,000 million for the Solids Handling Facility Improvements, Phase 1A, DP 7348; including additive alternates in the amount of $4,550,000 million for additional PE agreementsPage 1 of 21
Item 3.d.
CDr EENI RAL SAN BOARD OF •'
�J POSITION PAPER
CENTRAL CONTRA COSTA SANITARY DISTRICT �
� •
MEETING DATE: AUGUST 14, 2023
SUBJECT: REVIEW DRAFT POSITION PAPER TO AWARD A CONSTRUCTION
CONTRACT IN THE AMOUNT OF $121,738,000 MILLION TO C. OVERAA &
CO., THE LOWEST RESPONSIVE AND RESPONSIBLE BIDDER FOR THE
SOLIDS HANDLING FACILITY IMPROVEMENTS, PHASE 1A, DISTRICT
PROJECT 7348; INCLUDE AWARD OF ADDITIVE BID ITEMS TOTALING
$4,550,000 MILLION; AND AUTHORIZE THE GENERAL MANAGER TO
EXECUTE THE FOLLOWING:
1. ANEW PROFESSIONAL ENGINEERING SERVICES AGREEMENT
WITH CDM SMITH, INC. (CDM) FOR $3.6 MILLION FOR
ENGINEERING SERVICES DURING CONSTRUCTION (ESDC);
2. A$12.0 MILLION REVISION WITH MWH CONSTRUCTORS, INC.
(MWH) FOR CONSTRUCTION MANAGEMENT SERVICES;
3. A$3.4 MILLION REVISION WITHARCSINE ENGINEERING
(ARCSINE) FOR ELECTRICAL FIELD SERVICESAND ESDC;AND
4. UPDATE NEW EQUIPMENT CONTRACTS WITH ANDRITZ
SEPARATION TECHNOLOGIES, INC. FOR $3.1 MILLION, SCHWING
BIOSET, INC. FOR $3.0 MILLION, AND ENVIROCARE
INTERNATIONAL, INC. FOR $3.4 MILLION
SUBMITTED BY: INITIATING DEPARTMENT:
NATHAN HODGES, SENIOR ENGINEER ENGINEERING AND TECHNICAL SERVICES -
CAPITAL PROJECTS
REVIEWED BY: EDGAR J. LOPEZ, CAPITAL PROJECTS DIVISION MANAGER
GREG NORBY, DEPUTY GENERAL MANAGER
ROGER S. BAILEY, GENERAL MANAGER
ISSUE
On July 13, 2023, three sealed bids were received and opened for the construction of the Solids Handling
Facility Improvements, Phase 1 A, District Project 7348. The Board of Directors (Board) must consider
award of the contract or reject bids within 120 calendar days of the bid opening.
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Authorization is also required to execute or revise a professional engineering services agreement and
equipment contracts in the amount over $200,000.
BACKGROUND
Summary of Phase 1A Project Need and Scope:
The Solids Handling Facility Improvements, Phase 1A (Project) is the highest ranking and most critical
project in the Capital Improvement Program. The Project includes replacement and upgrading of key
assets needed to ensure operational reliability, safe working conditions, and regulatory compliance.
Central San's solids treatment and processing systems are in the Solids Conditioning Building (SCB). The
SCB houses the two large furnaces used to incinerate solids produced by the upstream treatment
processes, along with a range of related systems including air pollution controls, solids dewatering, the
cogeneration unit, and steam generation systems. The final product of incineration is ash that is disposed
of in an environmentally responsible manner as soil amendment. The existing furnaces have significant
remaining useful life. However, several of the related system for solids processes require replacement and
improvements. The scope of work and major project elements are as follows:
• More efficient wet scrubbers and related air pollution control equipment needed to reliably comply
with current and future air regulations for operating the furnaces, and to reduce or eliminate bypass
events.
• Replacement of the four existing centrifuges used for sludge dewatering and the four cake pumps
feeding the furnaces. These units have been in service for over 40 years, a reflection of the
exceptional maintenance, and are well beyond their normal useful service life. The new units will also
have improved energy performance or efficiency.
• SCB seismic upgrades to address existing deficiencies relative to current building standards. The
SCB is staffed 24 hours a day and contains a range of critical systems including the natural gas
cogeneration system, ash storage and handling, steam generation, and auxiliary boilers that provide
energy and backup reliability for the entire plant. Seismic improvements include retrofitting the SCB
exterior with concrete buttresses/pile foundations and interior steel bracing.
• Replacement of furnace and burner controls systems with modern and code compliant systems. The
existing controls for the furnaces and burners are deteriorated, obsolete and difficult to replace and
troubleshoot.
• Replacement of the furnace's burner control system, gas piping, blowers, center shaft drive, hearth
burners, and after -burners with new equipment are included.
• All the above scope items include electrical, instrumentation, and controls (EI&C) assets to function
with the new equipment and systems. E&I C related scope represents approximately 30-percent of
the construction cost of the Project and is a critical success factor for the schedule and overall
project success.
Solids Project Development History and Future Planning
The original Solids Handling Facilities Plan included the following phases:
Phase 1 developed under the 2017 Comprehensive Wastewater Master Plan consists of the
objectives identified under the Phase 1 A project and other scope elements such as a new ash
hauling facility, sludge blending improvements, furnace seismic isolators, control room modifications,
new electrical and control room, temporary dewatering facilities and sludge hauling, and a substantial
amount of electrical replacement. Phase 1 had an original completion date in 2025 and was intended
to improve the solids handling process reliably for a minimum of 20 years.
Phase 2 was the long-term plan for upgrading the solids handling systems, driven by capacity
concerns and air permit restrictions related to the furnaces. Future planning anticipated use of
August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 32 of 64
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anaerobic digesters and fluidized bed incinerators, like the solids treatment and energy recovery
model developed for the wastewater plant in Green Bay, Wisconsin.
The Solids Phase 1 project was a major undertaking by staff and other work was completed ahead of the
Project to facilitate the construction or address urgent concerns, such as:
• Pilot testing of the new air pollution control equipment.
• Demolition of the abandoned digester tank near the SCB.
• Construction of the emergency stairway for the SCB third -floor control room for safety egress.
• Construction of the Emergency Sludge Loading Facility modifications to reliably operate and load
sludge for extended durations.
• A new contractor entrance from I mhoff Drive and improved staging area.
Phase 1 was put out to bid in early 2021 and the Board rejected the three bids received due to the
unexpected high costs received and overall budget concerns. The low bid submitted was approximately
$180 million (M), and with all other project costs, resulted in a total estimated budget of $261.4 M. These
costs were nearly $70 M over Central San's planned budget at the time.
Central San decided to revisit the Solids Handling Facilities Plan and consider the alternative of moving
directly to Phase 2. Planning for Phase 2 was then initiated to evaluate alternative solids treatment
technologies and to determine if any of the Phase 1 elements should continue to be implemented. The
Phase 1 improvements were further refined into the following approximate groupings for planning
purposes:
Phase 1 A- focus on the highest priority needs for reliability of aging critical assets, safety, and air
regulatory compliance.
Phase 1 B- seismic upgrades to the SCB to ensure safety and reliability of operations under a
significant seismic event.
Phase 1 C- all other appurtenance systems that will eventually need reinvestment but are not deemed
as critical as Phase 1 A/B. Phase 1 C also needs to consider how to minimize stranded assets when
the transition to Phase 2 is eventually implemented.
I n general terms, Phase 1 A/B/C are anticipated to cover the next 15 to 20 years, during which time factors
related to solids disposal regulations, air quality requirements (including the fate of incinerated PFAS and
similar compounds), and the inter -play between the treatment plant's energy profile, incineration
processes, and plant -wide carbon emissions would be clarified. Phase 2 would then reflect improvements
beyond the 20-year horizon and the outcomes for these key risk and uncertainty factors.
Phase 1 A was developed through feedback from plant maintenance and operations, as well as regulatory
compliance and engineering. Through further evaluation and engineering design throughout most of 2021
and 2022, it was determined that the initial Phase 1 B seismic upgrades could be incorporated effectively
into Phase 1 A. It was also determined that anaerobic digestion as a treatment step ahead of incineration
was not recommended, helping narrow the range of Phase 2 alternatives.
Design changes from the 2021 Phase 1 to the 2023 Phase 1 A include the following:
• Drawings and specifications were deleted or modified to reflect the elimination of the scope items
not carried forward in Phase 1 A.
• The dewatering design incorporated scope reductions by reusing the existing polymer systems and
piping. The wet scrubber design was revised to eliminate drainage pumps and to seismically
separate the wet scrubber platform from the wet scrubber units and associated ductwork. The
furnace design was modified to reduce replacement of hearth burners and optimize blower sizing to
operate more efficiently.
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The building seismic improvements were redesigned to reduce the interior retrofit scope and added
two exterior seismic buttresses on the East and South sides of the SCB. The furnace seismic
improvements were deleted except for installing flexible gas piping and duct connections. This new
design will improve the ability to salvage the bellows used in the large metal ductwork during a major
seismic event. The previous design identified these bellows as sacrificial.
The revised electrical and instrumentation design deleted the new electrical room, reused the
existing second floor electrical room, utilized other available areas, and improved the biddability and
constructability of the plans by including more details on the following:
• Emphasis on the construction sequencing; carefully showing the demolition of existing
equipment and creation of space for new electrical equipment while keeping the SCB and
solids processes operational.
o Definition and detail for the verification requirements on the existing electrical and control
systems. Reusing and modifying the existing motor control centers and sequenced transition of
the existing electrical loads.
• Electrical equipment for the furnace induced draft fans were relocated and additional space in
the existing first floor electrical room was committed for new electrical equipment.
• Consolidating and locating the Dissolved Air Flotation Tank electrical outside the SCB and
near the existing system.
• Instrumentation and controls scope was reduced to maximize reuse of existing assets and
wiring while upgrading components. The scope reduction required a substantial effort to ensure
communication between the new and existing systems is maintained while keeping the existing
systems operational.
• 162 electrical and instrumentation drawings were added with additional drawing modifications
completed, for a total of 423 electrical and instrumentation drawings.
Equipment contracts (centrifuges, cake pumps, and wet scrubbers) were changed from assignment
to the general contractor to be Central San supplied. Feedback received after the Phase 1 bid was
that assigning those contracts added significant risk and costs.
Phase 1 required an extensive shutdown of the solids processes and expensive hauling of sludge
for an 18-month duration. Phase 1 A was designed to keep the solids process operational except for
one limited 21-day shutdown. Staff will continue to evaluate options to eliminate the shutdown through
the construction project and with the help of the contractor.
General contractors and electrical subcontractors for Phase 1 A were not prequalified to create a
more open and competitive bid environment.
Phase 1 A is the largest single plant renovation project Central San has undertaken since it was expanded
in the 1970's. As with all large or critical projects, staff has updated the Board at various committee and
board meetings on the projects throughout the years. Since 2017, staff has received authorization from the
Board on many occasions for items leading to today. A summary of prior Board actions is included as a
reference in Attachment 2 — Historical Board Action Summary.
Phase 1A Construction Bidding Results and Influencing Factors:
The Project was advertised on April 26 and May 3, 2023. The original bid date of June 29, 2023 was
extended two weeks due to El &C complexity and bidder feedback. Four project addenda were issued.
Staff facilitated 18 site visits by 101 prospective bidders and answered 237 technical questions.
The Engineer's estimate for construction is $130,000,000 - $135,000,000 M. Three (3) bids ranging from
$121,738,000 to $141,600,000 M were received and publicly opened on July 13, 2023. A summary of
bids received is shown in Attachment 3. Capital Projects conducted a technical and commercial review of
the bids and determined that C. Overaa & Co. (Overaa) is the lowest responsive and responsible bidder
with a bid amount of $121,738,000 M.
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Two of the three bidders were under the Engineer's estimate. The bid for Overaa is approximately $10.8
M under or by (8.1-percent) while W.M. Lyles Co. is $9.2 M (6.9-percent). W.M. Lyles Co. had a slightly
different approach and was planning to self -perform items that Overaa is subcontracting, and their overall
bids were within $1.6 M (1.2-percent) apart and highly competitive, considering the work is valued at
$132.5 M. It should be noted that the third bidder, the highest bid, was only 6.9-percent over the estimate.
The bid pricing demonstrates the effectiveness of the rescoping and design effort by staff and the
consultant team. The management and focus on improving the electrical and instrumentation design
eliminated much of the uncertainty that factored into the Phase 1 bids. In addition, several electrical
subcontractors were engaged and participated in the bid process. Other factors that contributed to
favorable bids and a more competitive bid environment, especially considering the expected four-year
project duration, are the changing economic conditions: the softening of inflation pressures on materials,
stabilizing labor conditions, and a slowdown in public works bidding.
While improved market conditions are forecasted, staff will be monitoring delivery conditions, especially
for electrical equipment. Electrical equipment delivery times continue to lag behind other deliveries and
have recently impacted Central San projects in construction. The entire construction management team will
work within the confines of the contract documents to ensure the contractor and suppliers meet their
obligations and that changing conditions are planned and handled in a manner that minimizes impact to
Central San and is fair to all parties.
Two additive bid items were included in the bid documents: replacing the sludge blending tank (SBT) roof
cover and replacing up to 20 furnace hearth burners. The Engineer's estimate for the cover is $2.0 M and
$600,000 for the burners. The additive bid prices ranged from $1.7 to $3.9 M and $600,000 to $825,000,
respectively. Staff recommends inclusion of both additive bid items. Although the cover is more than
anticipated, having the Phase 1 A contractor perform the work eliminates potential sequencing and staging
area conflicts compared to bidding separately. Included in the project scope is the replacement of all
burner controls and after -burners. Each furnace will be inspected and if any hearth burners are found
deteriorated, this additive item will allow for their replacement.
The bid documents included a supplemental bid item related to the furnace work. This item was included
with the base bid for determining the lowest monetary value for award and allows Central San the ability to
deduct furnace improvements and lower the costs for the item. The driver for the supplemental terms was
to ensure that the furnace work stays below the EPA's MACT 50 rule for furnace upgrades and new
technology. Based on the face value pricing provided by the bidders including Overaa, it appears that the
work is below the threshold that would not trigger additional air permitting requirements and additional
pollution control equipment. Staff will continue to monitor and evaluate the costs associated with MACT 50
during the construction project and work with the EPA and local air authority related to the furnace permits.
Significant equipment (cake pumps, centrifuges, and wet scrubbers) were pre -selected very early in the
project history. The original equipment contracts, executed in 2018, included an escalation clause in the
event equipment could not be accepted by the original delivery dates. Escalation is tied to a manufacturer
material cost price index, which has been highly volatile over the last 3 plus years due to covid-related
market and supply chain disruptions. The following are the cost changes for the equipment contracts
including change orders, escalation, and contingency:
• Centrifuges: $2,180,000 to $3,100,000 M.
• Cake Pumps: $2,123,000 to $3,000,000 M.
• Wet Scrubbers: $2,200,000 to $3,400,000 M.
Engineering and Construction Management Services:
Staff will administer and have overall control of the construction and oversee interaction with plant staff,
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consultants, and safety for Central San employees. MWH will be the construction manager (CM) providing
front-line and day -to day management with the contractor, including general and specialty inspection,
coordination of construction activities, startup and commissioning services, recommending payments,
schedule and cost review, file management, State Revolving Fund (SRF) compliance, and various other
support duties required to effectively manage the complexities of the Project. MWH was selected through
a formal public solicitation and the proposed project team has been updated to meet Central San's
expectations and support needs. The fee for CM services is approximately $12.0 M. MW H's current
agreement is valued at $1.1 M and including the proposed services will result in a new cost ceiling of $13.'
M. Central San will carry a 10-percent contingency for the MWH agreement and will include at a future
date, if necessary.
Staff contracted with several individual consultants for Phase 1A. HDR and Degenkolb Engineers were
retained from the original design effort. CDM, GHD and Aresine joined the Project when the Board
authorized their design agreements in November of 2021. CDM is responsible for the dewatering scope
of work and functioned as the lead consultant. While GHD is responsible for furnace and wet scrubbers
and Aresine for the overall E I &C scope of work.
Additionally, other specialty consultants assisted in the Phase 1 A design and will continue to support the
construction effort. These consultants consist of Stan Chilson, LLC (furnace expert), BSK Associates
(geotechnical), Ewing Construction Services (contracts) and HP Squared, Inc. (arc -flash and power
expert).
All these firms will provide ES DC. Staff is reorganizing the consultant team to bring HDR, GHD, and
Degenkolb Engineers as subconsultants under CDM. Staff will continue to directly contract with Aresine
and CD M, and will require Board authorization. The specialty consultants are working under staff authority
and have current as -needed services agreements within the Capital Program.
Hazardous materials consulting, testing, and related services are essential for a safe worksite and Project.
Existing building materials have lead paint or primers, asbestos, and a significant amount of concrete
demolition will take place inside the SCB and silica is of concern. Additionally, excavation for exterior
buttresses and installation of drilled piles are expected to encounter some level of contaminated soil and
groundwater. Staff will be soliciting for a consultant to provide hazardous material support for project
duration. The agreement for these services is expected to be $500,000 and Board approval will be
requested at a future time.
California Environmental Quality Act (CEQA):
At its December 6, 2018, meeting, the Central San Board of Directors independently found that this
Project is exempt from the CEQA under Central San CEQA Guidelines Section 15301, since it involves
minor alterations to existing public facilities involving no expansion of use, and CEQA Guidelines Section
15302, since it involves replacement of existing public facilities at the same location and with the same
purpose.
ALTERNATIVES/CONSIDERATIONS
The Board could consider the following alternatives or provide other direction:
Alternative 1: Reject Bids:
The Board may elect to reject all bids, this is not recommended as 1) The current scope has been
reduced as far as practical and the work is needed as soon as possible; and 2) Bid pricing received is
favorable and highly competitive.
Alternative 2: Adjust budget within Fiscal Year (FY) 2023-24
The FY 2023-24 adopted Budget includes a Phase 1 A total estimate of $195.5 M as shown on page 250.
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Page 7 of 21
As detailed in the financial section below, the estimated budget at award is $206.6 M. The Board could
direct staff to stay within the budgeted total which would require an adjustment in the contingency amount
and or deletion of the additive items or other adjustments. This is not recommended since the project is
complex and has a four-year duration and should have sufficient contingency for unknowns and for
potential changes. All items identified under the project are critical and needed to continue reliable
operations to process solids at the plant.
FINANCIAL IMPACTS
The total estimated project cost for Phase 1 A is $206,564,000 M which includes prebid expenditures with
Phase 1 and 1A, design, bidding, bid price, construction management, consultant costs, staff time, and
contingency as detailed in Attachment 4.
The additional $11 M funding needed does not impact the FY 2023-24 Budget, however, the future
treatment plant or other programs and its projects will need to be analyzed and may require adjustments to
stay within the rates projected in the overall Central San budget. Other factors, such as project savings or
lower project bids can lower or assist in funding Phase 1 A. With the next four years remaining, staff
anticipates narrowing or closing the forecasted budget gap.
A large portion of the project costs will be paid for by the SRF loan that was approved for $173.1 M.
COMMITTEE RECOMMENDATION
The Engineering and Operations Committee reviewed this subject at the meeting on August 14, 2023, and
recommended
RECOMMENDED BOARD ACTION
Staff recommends the following:
• Award a construction contract in the amount of $121,738,000 M to C. Overaa & Co., the lowest
responsive and responsible bidder for the Solids Handling Facility I mprovements, Phase 1 A, District
Project 7348;
• I nclude award of additive bid items totaling $4,550,000 M; and
• Authorize the General Manager to execute the following:
1. A new professional engineering services agreement with CDM Smith, I nc. for $3.6 M for engineering
services during construction;
2. A $12.0 M revision with MW H Constructors, I nc. for construction management services;
3. A $3.4 M revision with ArcSine Engineering for electrical field services and engineering services
during construction; and
4. Update new equipment contracts with Andritz Separation Technologies, I nc. for $3.1 M, Schwing
Bioset, I nc. for $3.0 M, and Envirocare I nternational, I nc. for $3.4 M
August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 37 of 64
Page 8 of 21
Strategic Plan Tie -In
GOAL ONE: Customer and Community
Strategy 1— Deliver high -quality customer service
GOAL TWO: Environmental Stewardship
Strategy 1 - Achieve compliance in all regulations, Strategy 4 - Identify and advance sustainability initiatives, including
reducing energy usage and emissions
GOAL FOUR: Governance and Fiscal Responsibility
Strategy 3 - Maintain financial stability and sustainability
GOAL FIVE: Safety and Security
Strategy 2 - Protect Personnel and assets from threats and emergencies
GOAL SIX: Infrastructure Reliability
Strategy 1 - Manage assets optimally, Strategy 2 - Execute long-term capital renewal and replacement program
GOAL SEVEN: Innovation and Agility
Strategy 1 - Leverage data analytics to become a more efficient utility
ATTACHMENTS:
1. Project Location Map
2. Historical Board Action Summary
3. Summary of Bids
4. Post-B id/P reconstruction Estimate
5. Presentation
August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 38 of 64
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Attachment 2
Historical Board Action Summary:
December 2016- Board approved combining separate projects into a single project,
predesign funding, and a $2 million (M) professional engineering services (PES)
agreement with Black & Veatch (B&V) for predesign services.
December 2016- Board approved wet scrubber piloting work and contracts.
April 2017- Board approved air emissions testing consulting agreement to support
wet scrubber piloting.
April 2018- Board approved amending the B&V PES agreement to include final
design services for an amount not to exceed $5.9M.
December 2018- Board approved resolution regarding funding eligibility for SRF
funding.
December 2018- Board authorized the pre -selection and contracting for dewatering
centrifuge equipment and cake pumping equipment. Additionally, the Board
authorized the sole source pre -selection and contracting for the wet scrubber
equipment.
June 2019- Board authorized a construction contract for the Emergency Sludge
Loadout Facility Upgrades, District Project 7348A, and amending the agreement
with B&V by $220,000.
December 2019- Board authorized a PES agreement with MWH Constructors, Inc.
(MWH) for an amount not to exceed $400,000 for constructability review and pre -
bid services.
August 2020- Board authorized the General Manager to submit an updated SRF
loan application for $173M and associated resolutions.
August 2020- Board authorized increasing the B&V PES agreement to a ceiling of
$9,654,636 and increasing the MWH PES agreement to a ceiling of $950,000.
February 2021- Staff presented a project update and announced advertisement of
project bidding. Additionally, the Board authorized the GM to amend the MWH PES
agreement to a ceiling of $1.1 M and amend the blanket agreement with ArcSine
Engineering to a ceiling of $975,000.
August 2021- Staff held an informational workshop to provide a project status
update and bid period activities, to consider proposed recommendation to award a
construction contract to Kiewit Infrastructure West, Co., to consider alternatives,
and held a questions and answers session.
September 2021- Board rejected all bids for the Phase 1 project.
October 2021- Board authorized staff to proceed with the execution of the SRF
Loan Agreement documents and adopted resolution approving the financing
agreement.
November 2021- Board authorized PES agreements with CDM Smith, Inc. in an
amount of $850,000; ArcSine Engineering in an amount of $600,000-1 and GHD, Inc.
in an amount of $500,000 to rebid a rescoped Phase 1A project.
August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 40 of 64
Page 11 of 21
May 2022- Board authorized amending an existing agreement with Degenkolb
Engineers, Inc., increasing the cost ceiling to $334,000.
September 2022- Board authorized amending existing agreements with CDM
Smith, Inc., increasing the cost ceiling to $1.4M; GHD, Inc., increasing the cost
ceiling to $700,000; ArcSine Engineering, increasing the cost ceiling to $800,000;
and HDR Engineering, Inc., increasing the cost ceiling $350,000.
February 2023- Board received the bid announcement and granted an exception to
Board Policy No. 037, Delegation of Authority to General Manager, to amend four
existing agreements, as may be needed, up to a combined total not to exceed
$750,000 for final design and bid phase activities.
August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 41 of 64
Page 12 of 21
ATTACHMENT 3
SOLIDS HANDLING FACILITY IMPROVEMENTS, PHASE 1A
DISTRICT PROJECT 7348
SUMMARY OF BIDS
PROJECT NO.: 7348 NO. OF ADDENDA: 4 DATE/TIME: JULY 13, 2023, 2:00 PM
PROJECT NAME: SOLIDS HANDLING FACILITY IMPROVEMENTS, PHASE 1A
PROJECT MANAGER: NATHAN HODGES
PROJECT LOCATION: 5019 IMHOFF PLACE, MARTINEZ, CALIFORNIA
ENGINEER'S EST.: $130,000,000 - $135,000,000
NO.
BIDDER
BID PRICE
1
C. Overaa & Co.
$121,738,000
Richmond, California
2
W.M. Lyles Co.
$123,329,000
Fresno, California
3
Kiewit Infrastructure West Co.
$141,600,000
Fairfield, California
BIDS OPENED BY: /s/Eileen Hansen
DATE: July 13, 2023
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ATTACHMENT 4
SOLIDS HANDLING FACILITY IMPROVEMENTS, PHASE 1A
DISTRICT PROJECT 7348
POST-BID/PRECONSTRUCTION ESTIMATE
No.
Item Description
Amounts
% Construction
Cost
1.
CONSTRUCTION
a. Construction Contract
$121,738,000
b. Additive Bid Item - Burner Replacement
$600,000
c. Additive Bid Item - Replacement of Tank Cover
$3,950,000
d. Project Contingency at 10%
$16,100,000
e. Permits (Air Testing included)
$1,000,000
f. Hazardous Compliance (Testing included)
$500,000
g. Equipment Contract - Centrifuges
$3,100,000
h. Equipment Contract - Cake Pumps
$3,000,000
i. Equipment Contract - Wet Scrubbers
$3,400,000
SUBTOTAL - CONSTRUCTION:
$153,388,000
100%
2.
CONSTRUCTION MANAGEMENT
a. District Forces
- Engineering staff (PM, RE, Safety, etc.)
$6,500,000
- Operations Support, including Maintenance
$3,500,000
b. Consultants
- MWH: Construction Management Services
$12,000,000
- Aresine (ESDC)
$3,400,000
- CDM (ESDC, includes HDR, GHD, Degenkolb)
$3,600,000
- As -needed Services (Furnace, Haz, Geotech, others)
$600,000
SUBTOTAL - CONSTRUCTION MANAGEMENT
$29,600,000
19.3%
3.
PREBID EXPENDITURES - Phase 1
a. Engineering (Staff, Consultants, Scrubber Pilot, etc.)
SUBTOTAL - PREBID EXPENDITURES Phase 1
$15,872,000
10.3%
4.
PREBID EXPENDITURES - Phase 1A
a. Engineering
- District Staff Time (Engr. And Operations)
$2,000,000
- CDM
$2,097,000
- Aresine
$1,100,000
- GHD
$893,000
- HDR
$500,000
- Degenkolb
$364,000
- Other Consultants (Ewing, Furnace, SCA, Others)
$550,000
- Equipment Selection Procurement (Stage 1)
$200,000
SUBTOTAL - PREBID EXPENDITURES Phase 1A
$7,704,000
5.0%
5.
TOTAL ESTIMATED PROJECT COST
1 $206,564,000
August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 43 of 64
Page 14 of 21
Attachment 5
August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 44 of 64
Page 15 of 21
Phase 1A Ready to Award
I
ai
O
COMPLETED
3 PROJECTS
SLUDGE TANK COVER MULTIPLE
BLENDING/ REPLACEMENT HEARTH
STORAGE FURNACES
M
O
O
O
6r
O
O
8r
redesign
AIR POLLUTION
CONTROL
ASH HANDLING
ANDLOADOUT
ELECTRICAL
NEW
ELECTRICAL
RENOVATION
CENTRIFUGE
DEWATERING
SCB SEISMIC
RETROFIT-
SCB SEISMIC
RETROFIT -
CONSTRUCTION
SYSTEM
SHEAR WALLS
BUTTRESSES
Background
Phase 1 bids rejected in September
2021. Total project estimated cost was
$261.4 million (M). Low bid was $180 M
and second low bid was $207 M.
New consultant team assembled:
CDM Smith, Inc.
Aresine Engineering (electrical)
HDR Engineering, Inc.
GHD, Inc.
Degenkolb Engineers (seismic)
Phase 1 scope modified to prioritize
most urgent needs and minimize
potential for stranded assets in event
that the long-term solids plan (Phase 2)
were to change.
August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 45 of 64 2
Page 16 of 21
Background - Redesign
Phase 1A includes Solids Phase 1B Seismic of the Solids
Conditioning Building to address vulnerabilities during a
major seismic event.
Significant electrical design effort to change approach to
renovation work focused on new equipment and systems
being replaced while building operations stay in service.
Phase 1 had an 18-month shutdown of furnaces and sludge
disposal, while Phase 1A includes a shutdown of under one
month.
Lessons learned from the previous bid included to help
bidders understand and to make easier to quantify the
scope.
Outreach for contractors, especially for electrical and
specialty work, to increase competition.
-r
Background - Long Term Plan
Phase I
',Phase 2
Digestion &
Incineration
2021-22
Phase 1A Phase I C
& IB 1311111� I
Phase 2
New Incineration
Building
August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 46 of 64 3
Page 17 of 21
Active Bidding Process
Advertised April 26 and May 3
Original bid date June 29, extended to July 13
4 Addenda issued
Staff conducted 18 site tours
237 questions submitted and answered
"In my 25 years in the water business, 1 have never gone through
a bid cycle with such an actively engaged client ...an engaged
client is the #1 variable influencing a successful project"
- Bidder
Successful Bid Results
Engineer's Estimate $130 M - $135 M
• C. Overaa & Co. $10.8 M or 8.1% under
Engineer's estimate
1.2% difference between lower bidders
Highest bid 6.9% over Engineer's estimate
Competitive bids
C. Overaa & Co. meets the bidding requirements
✓ Contractor and project manager
experience
✓ Financial review
✓ SRF and DBE review
✓ Lowest responsive and responsible bidder
8
-r
NO.
BIDDER
BID PRICE
1
C. Overaa & Co.
$121,738,000
Richmond, California
2
W.M. Lyles Co.
$123,329,000
Fresno, California
3
Kiewit Infrastructure West Co.
$141,600,000
Fairfield, California
g) CENTRALSAN
August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 47 of 64 4
Page 18 of 21
Additive and Supplemental
^" -
Bid Items
-
Additive bid items recommended:
�N
Replace sludge blending tank cover at $3,950,000�
Replace up to 20 furnace burners at $600,000
q.
y
Supplemental bid item for furnace work:
_
Allows staff to deduct furnace work to stay within EPA's_
~'
MACT 50 threshold
-
Bid pricing received lower than expected and should not
trigger new permitting requirements and additional
equipment
V'
Regulatory will continue to work with the construction,
team to monitor final costs.
�.
Equipment Contracts
Centrifuges — Andritz Separation $2,180,000 $3,100,000 Electrical, instrumentation, and
Technologies, Inc. controls (EI&C) revisions
Cake Pumps —Schwing Bioset, Inc. $2,123,000 $3,000,000 EI&C revisions
Air Pollution Control — Envirocare $2,200,000 $3,400,000 Redesign scrubber for easier
International, Inc. installation, EI&C revisions
Contract updated for Central San -supplied equipment
Costs updated per design changes, vendor engineering, and escalation indices
Approval to fabricate will be done soon after award
August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 48 of 64 5
Page 19 of 21
Construction Support
Large, complex project over 4 years
with varying levels of activity
Staff (Engineering and Operations) = $10.0 M
Consultants:
Construction Management, MWH Constructors, Inc. - $12.0 M
ESDC, CDM Smith, Inc. - $3.6 M (Includes HDR Engineering, Inc., Degenkolb
Engineers and GHD, Inc.)
ESDC and Electrical Field Services, Aresine Engineering - $3.4 M
Hazardous Waste Support, TBD - $500,000
Others As -needed Services - $600,000
ESDC = Engineering Services During Construction
Total Estimated
Project Budget
4 /
�(� + an11111=l ir4r,.u;K,-V1
.I4.L1�1111!l�1�I ! P JIRJIM 'I
State Revolving Fund of
$173.1 M ($13.1 Received)
S
[EMRRS COi+iRn COSTS SAwTnAT g51RILi
N.
Item Description
Amount¢
% Conslruction
Cost
1.
CONSTRUCTION
a. Canmruelian Contract
$121 738.000
b. Additive Ed Item - Humgr R9Plaggmget
$600,000
c. Additive Bid Item . Replacement.1Tank Cover
63,950,000
d. Project Contingency M 10%
$18,100,000
e. Permits (Air Testing included)
Sic coo
I. Hazamous Compliance (Testing inLludedj
s500,000
U. Equipmen[Contrecl-Cenlnfuges
$3,100,000
h, Equipment Centracl - Cake PUMPS
53,000,000
i. Equipment Conned - Wet Scrubbers
S3,400,000
SUBTOTAL -CONSTRUCTION.
$153.388.000
100%
2.
CONSTRUCTION MANAGEMENT
a. ❑ietu Fortes
• Engineering stab {PM. RE. Safety. etc.}
$6,500,000
- Operations Suppon, Including Memtenance
$3,500,000,
b. Consultants
-MWH-Construction Management 3—ices
$12000,000
- A(ESDC(
53,400.000
-CDM (ESDC, includes HDR. GHD, Degenkolb)
$3'600,000
As -needed 8—ices Pi mace, Paz. Geotech, others)$600,000
SUBTOTAL - CONSTRUCTION MANAGEMENT
$29.600000
193%
S.
PREBID EXPENDITURES -Phase 1
a. Engineering (Staff, Consultants. Scrubber Pi , ale.)
SUBTOTAL- PREBIDEXPENDITURES Phase l
$15.872.000
103%
4.
PREBID EXPENDITURES -Phase 1A
e. Engineering
-District Stelf Tme(Engr. And Operations}
$2,000,000
- CDM
$2 p97,000
-A-u-
$1,100,000
- GHD
$893 000
- HDR
1500,000
- Degenkolb
$364,000
-Other CensIl(E-11, Fumace, SCA, Others)
$550,000
- Equipment Selection P—mmeet (Stage l)
209 000
EUSTOTAL- PREBID EXPENDITURE E Phase lA
7704.000
1
5.OWo
S.
TOTAL ESTIMATED PROJECT COST
.06,564.000
August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 49 of 64 6
Page 20 of 21
Project Schedule
Phase IA
Project Award Early Mobilization
-• •NovDec,
1 1 1
1 123 AP 20231
Phase I A
NTP—Admin and
Construction
Investigations
Recommended Board Action
Award a construction contract in the amount of
$121,738,000 to C. Overaa & Co., the lowest responsive
and responsible bidder for the Solids Handling Facility
Improvements, Phase 1A, District Project 7348;
Include award of additive bid items totaling $4,550,000;
and
Authorize the General Manager to execute the following:
A new professional engineering services agreement
with CDM Smith, Inc. for $3.6 million for ESDC;
A $12.0 million revision with MWH Constructors,
Inc. for construction management services;
A $3.4 million revision with Aresine Engineering for
electrical field services and ESDC; and
Update new equipment contracts with Andritz
Separation Technologies, Inc. for $3.1 million,
Schwing Bioset, Inc. for $3.0 million, and Envirocare
International, Inc. for $3.4 million
if
F,
J
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August 14, 2023 EOPS Regular Committee Meeting Agenda Packet - Page 51 of 64