HomeMy WebLinkAbout05. Amend agreement with Stantec Consulting for design of Filter Plant and Clearwell Improvements, Phase 1A, DP 7361 Page 1 of 16
Item 5.
CENTRAL SAN BOARD OF DIRECTORS
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POSITION PAPER
MEETING DATE: OCTOBER 17, 2019
SUBJECT: AUTHORIZE THE GENERAL MANAGER TO AMEND AN EXISTING
PROFESSIONAL ENGINEERING SERVICES AGREEMENT WITH
STANTEC CONSULTING SERVICES, INC. TO INCREASE THE
AGREEMENT CEILING FROM $1,540,000 TO $3,078,000 FOR FINAL
DESIGN OF THE FILTER PLANTAND CLEARWELL IMPROVEMENTS —
PHASE 1A, DISTRICT PROJECT 7361
SUBMITTED BY: INITIATING DEPARTMENT:
CHATHURAABEYRATHNA, ASSOCIATE ENGINEERING AND TECHNICAL SERVICES-
ENGINEER CAPITAL PROJECTS
REVIEWED BY: CRAIG MIZUTANI, SENIOR ENGINEER
EDGAR J. LOPEZ, CAPITAL PROJECTS DIVISION MANAGER
JEAN-MARC PETIT, DIRECTOR OF ENGINEERING AND TECHNICAL
SERVICES
Roger S. Bailey
General Manager
ISSUE
Board of Directors' (Board) authorization is required for the General Manager to execute an amendment to
a professional engineering services agreement above ten percent or$200,000, whichever is greater.
BACKGROUND
Central San's recycled water facilities have provided a reliable supply of recycled water to Central San's
wastewater treatment plant (plant) since being commissioned in 1977. In the mid-1990s, Central San
modified these facilities to produce California Title 22 Water Quality Requirements for Recycled Water
(Title 22) and delivery to off-site customers in Zone 1, which was defined under an agreement with Contra
Costa Water District (CCWD).
October 17, 2019 Regular Board Meeting Agenda Packet- Page 25 of 82
Page 2 of 16
While Central San remains the largest customer of the Recycled Water Program, some of the recycled
water facilities are nearing the end of their useful lives, which is leading to reliability concerns and the need
to address the critical elements of the Filter Plant and Clearwell Improvements project to proceed at this
time.
Several recent failures, described below, have shaped and focused staff's recommendations for this first
phase of the project, entitled Phase 1 A. The east Clearwell cover experienced some failures in 2017. 1 n
2018, a high-voltage (12kV) electrical feeder from Substation 82 (Central San's main PG&E electrical
service)to Substation 40 at the Filter Plant failed at a splice box. I n early 2019, Substation 40
experienced another failure which triggered a cascading series of events that led to a 16-minute, plant-
wide power failure. The cover ripped in J my 2019, leading to the east cell decommissioning. Recycled
water storage is now accomplished in the west Clearwell, which was recently cleaned, commissioned with
a temporary cover, and placed in operation. These incidents reflect that, despite staff's good operation
and maintenance practices, the recycled water facilities are showing signs of significant deterioration,
which is starting to impact reliability.
Project History:A Phased Approach with Future Recycled Water Projects
On May 3, 2018, the Board authorized an agreement with Stantec Consulting Services, Inc. (Stantec)to
provide planning and preliminary design of the Filter Plant and Clearwell Improvements, District Project
7361. As part of this agreement, Stantec prepared several technical memoranda that reviewed the
condition of the filter plant, disinfection alternatives, hydraulics, seismic assessment, process and
automation, and alternative filtration technologies.
Staff and Stantec have taken a long-term approach on this project and have evaluated the possible
impacts of future projects, including the Concord Community Reuse Project and especially the Water
Exchange Project. When looking at possible solutions to resolve the aging infrastructure needs for the
recycled water facilities, the team evaluated Central San's immediate needs, which include the most
critical items that require replacement to restore reliability over the next five to ten years, and that would not
conflict with or potentially leave stranded assets when the Water Exchange Project is implemented. Staff
asked the question: If we knew today that a Water Exchange Project was proceeding, would our
recommendation be different?
With that thought in mind, staff developed a recommendation that divides the Filter Plant and Clearwell
Improvements into three phases, with the most operationally critical elements proceeding first.
• Phase 1 A: Electrical improvements, recycled water storage tanks, Clearwell pump renovation, and
rehabilitation of one of the four existing filters.
• Phase 1 B: Rehabilitation of the remaining three filters and Filter Building, other remaining electrical
improvements, upgrades to the Applied Water Pump Station and hydraulic improvements to bypass
the Forebays. This phase would also include the addition of a chlorine contact basin and would
complete the remainder of the renovations to meet the long-term needs of the Recycled Water
Program.
• Phase 2: Improvements to provide additional recycled water supply to CCW D so they can serve the
future Concord Community Reuse Project. (The Phase 2 project, and its associated costs, is not
currently included in the Ten-Year Capital Improvement Plan and budget.)
On May 2, 2019, the Board approved an amendment to the agreement with Stantec to complete the 30-
percent design for the Phase 1 A project.
Shortly thereafter, on June 21, 2019, Central San staff held a Technical Peer Review Treatment Train
October 17, 2019 Regular Board Meeting Agenda Packet- Page 26 of 82
Page 3 of 16
Workshop for the Water Exchange Project. The purpose of the workshop was to seek input from technical
experts in the consulting and academic communities on the most optimal treatment train that could
produce both Central San's current and future Title 22 recycled water supply, in addition to refinery-quality
recycled water, while considering Central San's future nutrient removal requirements. There were 32
people in attendance, including Central San staff, Dr. Glen Daigger(University of Michigan), Dr. David
Jenkins (Professor Emeritus, UC Berkeley), the lead technologists from twelve major wastewater
consulting firms, and representatives of our partner agencies (CCWD and Valley Water). The outcome of
the workshop was a number of proposed treatment alternatives.
Some of the proposed treatment alternatives included continuing to incorporate process elements of the
Filter Plant; possibly repurposing some of the structures (e.g. Forebays and Filter boxes); or completely
abandoning the Filter Plant and replacing it with membrane technology. However, under all these
alternatives, the need to store and distribute the recycled water to the end users (Central San and Zone 1)
remained unaltered. This review of the potential synergy between current and future recycled water related
projects further confirmed the decision to divide the project into phases and proceed with the Phase 1 A
project.
Phase IA Project
Staff recommends moving forward with Phase 1 A, which focuses primarily on providing reliable recycled
water storage and distribution to end users. The Phase 1 A project will serve the recycled water facilities
whether or not the future Water Exchange Project is implemented. Phase 1 A would address recycled
water supply reliability (e.g. storage and pumping) and address electrical safety and deficiency concerns.
n addition, it will include rehabilitating one of the four existing filters. This filter rehabilitation would have a
dual purpose: reliability of production (worst operating filter) and provide the filtration production capacity
needed to meet current demand using new filter media. Central San will benefit from the new filter for a
minimum of five to ten years before the Water Exchange Project is implemented. A more detailed scope
of work for Phase 1 A is provided in Attachment 1.
Business Case Evaluations (BCEs)
Central San performs comprehensive BCEs for every capital project, which includes, but is not limited to,
the following tasks:
• Evaluate specific project needs and drivers.
• Conduct an in-depth evaluation of existing asset condition assessment(s) and determination of
remaining life.
• Evaluate whether to keep the existing assets or replace with in-kind and/or new technology.
• Evaluate current and possible future regulatory drivers or related projects that would impact the
project solutions.
• Preliminary investigation as needed (geotechnical, permitting, environmental, etc.).
• Prepare alternative solutions, which consists of: prepare and estimate costs and related
expenditures; evaluate operations and maintenance impacts; compare pros and cons; and prepare
lifecycle cost analysis for each alternative.
• Prioritize scope or projects based on multiple factors. Sometimes, this may require phasing a
project over time or combining projects into one project.
• Conduct pilot testing of preferred technology when appropriate to validate design criteria and risk
(i.e. Filter pilot testing completed under Phase 1 A).
• Review and discuss with the Capital I mprovement Program Executive Review Committee
(Executive Team) and stakeholders.
October 17, 2019 Regular Board Meeting Agenda Packet- Page 27 of 82
Page 4 of 16
Since the last Board update, two BCEs were conducted. The BCEs include disinfection and recycled
water storage. Staff recommends postponing the chlorine contact basin and building two new steel
storage tanks. Details of these BCEs can be reviewed in Attachment 2. At the request of the Engineering
and Operations Committee, alternative RW S-6 was evaluated to determine if constructing the new storage
tanks with cast-in-place reinforced concrete with a common divider wall would be more cost effective than
the recommended alternative RWS-3: Provide two new storage tanks using above-ground steel. This
BCE alternative was evaluated by the design team and determined to be more expensive than the
recommended alternative.
California Environmental Quality Act(CEQA):
At its May 2, 2019 meeting, the Board independently found that the agreement with this vendor (Stantec)
was exempt from CEQA under Central San's CEQA Guidelines Section 15262, since it allowed for
further planning and feasibility studies for possible future actions which Central San has not approved,
adopted, or funded, and the outcome of these tasks will not have a legally binding effect on later activities.
Central San will conduct an environmental evaluation of any capital project that is proposed in the future as
a result of the tasks authorized herein to determine the need for any additional CEQA documentation.
ALTERNATIVES/CONSIDERATIONS
Other alternatives are set forth below; however, are not recommended by staff.
Alternative 1: Split Phase 1 A into smaller projects and spread the construction over several fiscal years.
While this approach would result in a smaller initial design fee request, administering separate smaller
projects within the same work areas, possibly with overlapping schedules, would be more challenging in
terms of coordination between the designs and potentially multiple contractors, thereby increasing the
overall cost of the project. This alternative would result in higher costs due to the added overhead, cost of
bidding and administering separate projects, staff coordination, and costs for keeping the facility
operational during construction.
Alternative 2: Delay recommended project elements longer or minimize scope and wait to integrate the
solutions to the current problems with the Water Exchange Project. Under this alternative, staff would
proceed with a smaller scope project and postpone some of the needed work to the future, if possible. All
elements suggested as part of Phase 1 A are deemed critical for the reliable operation of the recycled
water facilities and required in the next five years, with electrical and storage needed sooner. The only
scope item that may be considered for postponing is rehabilitating one filter; however, staff is proposing to
list this work as a bid alternate and consider the rehabilitation after receiving the bid.
Alternative 3: Do nothing to the facilities. Under this alternative, staff would not amend Stantec's
agreement and the existing recycled water facilities would continue operating in its current condition.
Repair of facilities would be done upon failure. This alternative would prevent staff from implementing work
that will maintain a reliable recycled water supply to both Central San's plant and Zone 1 customers.
FINANCIAL IMPACTS
The total anticipated cost for final design for Phase 1A is $1,538,000, which includes design and bidding
services performed by Stantec. The current Stantec agreement is valued at$1,540,000 and if the final
design is included would result in an agreement valued up to $3,078,000, as shown in the table below.
Services Fees Board Approval
Original Agreement— Planning/Pilot Study $990,000 May 3, 2018
Amendment 1 — Phase 1 A Preliminary Design $550,000 May 2, 2019
Current Stantec Agreement $1,540,000
October 17, 2019 Regular Board Meeting Agenda Packet- Page 28 of 82
Page 5 of 16
Proposed Amendment— Phase 1A Final Design $1,538,000 Pending
Total Contract Value with Amendments $3,078,000
The total estimated cost of Phase 1 A is approximately$35.5 million, of which approximately$27 million is
construction costs, as detailed in Attachment 3. The total agreement value with amendments constitutes
about 11.4 percent of the estimated construction cost, which appears high. However, this includes planning
(which applies to all proposed project phases) and pilot testing costs. When compared to the design
costs, the actual percentage ranges between 8-10 percent. This project is complex as it involves multiple
facilities and includes the evaluation of many evolving options and the implication of future projects.
COMMITTEE RECOMMENDATION
The Engineering and Operations Committee reviewed this subject at the September 17, 2019 meeting
and recommended approval. The Committee also requested that one additional alternative for the new
storage tanks be evaluated. Information about this alternative was incorporated in the Position Paper.
RECOMMENDED BOARD ACTION
Authorize the General Manager to amend an existing professional engineering services agreement with
Stantec Consulting Services, Inc. to increase the agreement ceiling from $1,540,000 to $3,078,000 for
final design of the Filter Plant and Clearwell Improvements — Phase 1A, District Project 7361.
Strategic Plan Tie-In
GOAL ONE: Provide Exceptional Customer Service
Strategy 1 - Build external customer relationships and awareness
GOAL THREE: Be a Fiscally Sound and Effective Water Sector Utility
Strategy 2- Manage costs
GOAL FIVE:Maintain a Reliable Infrastructure
Strategy 1 - Manage assets optimally throughout their lifecycle
GOAL SIX: Embrace Technology, Innovation and Environmental Sustainability
Strategy 1 -Augment the region's water supply, Strategy 3- Encourage the review and testing of technology to optimize
and modernize business operations
ATTACHMENTS:
1. Phase 1A Scope of Work
2. Business Case Evaluations
3. Total Phase 1 A Cost Estimate
4. Presentation
October 17, 2019 Regular Board Meeting Agenda Packet- Page 29 of 82
Page 6 of 16
Attachment 1
Filter Plant and Clearwell Improvements - Phase 1A, District Project 7361
Scope of Work
Staff recommends the following scope of work for Phase 1A final design:
1. Electrical Replacement and Upgrades:
a. Electrical power distribution to the Electrical Substation 40 will be reconstructed
to remove 2400v equipment and replace with new medium voltage distribution,
step down transformers and 480v equipment.
b. Clearwell Pumping Station Electrical. New 480v electrical switchgears including
new motor control centers (MCC) and variable frequency drives (VFD) for the
Utility Pumps, Backwash Pumps and Recycled Water Pumps for Zone 1.
Equipment to be housed in a pre-engineered electrical building.
2. Recycled Water Storage Tanks Addition:
a. Two new three-million-gallon (MG) recycled above grade water storage tanks
will be constructed to replace the East Clearwell. The new tanks will be
conventional steel tanks with a protective coating inside and out, which is
standard practice for water storage structures.
b. Appurtenances will be added to facilitate operation in series or parallel to
provide chlorine contact time under different operating scenarios for high
recycled water demand in the summer and low demand in the winter.
c. The embankment for the East Clearwell will be partially removed to provide a
site area for the new storage tanks.
d. The West Clearwell will be maintained to facilitate recycled water delivery
during construction and to provide backup storage.
3. Filter Rehabilitation:
a. One filter of the existing four filters will be rehabilitated with new filter media
and underdrains to confirm that the filter can reliably operate at a filtration
capacity of 4.5 MGD/filter (million gallons per day/filter).
b. All filters will receive reliability work to replace aging instrumentation and
restore individual filter effluent turbidity measurement.
c. Shade structures will be added to the filters to control attached algae growth
and improve filter operation, which will reduce maintenance.
d. The chemical feed reliability work will replace aging instrumentation, piping and
valves on the hypochlorite system and update the feed pump motor control
center. The coagulant system will be modified to feed a new filter aid.
4. Clearwell Pump Station (CWPS) Improvements:
a. A new Utility Water pump will be added at the CWPS.
b. The shade structure will be rebuilt to improve reliability of the Utility and
Recycled Water delivery pumps.
c. Replace the three Backwash Pump motors, as needed.
October 17, 2019 Regular Board Meeting Agenda Packet- Page 30 of 82
Page 7 of 16
Attachment 2
Filter Plant and Clearwell Improvements - Phase 1A, District Project 7361
Business Case Evaluation (BCE) - Disinfection and Storage Alternatives
Disinfection Alternatives:
The viable BCE options that were examined for each disinfection alternative were:
• DIS-1: Reinforced concrete partitions to create chlorine contact basins (CCBs) within the
existing Clearwell (in each cell);
• DIS-2: Reinforced concrete CCBs within the existing Forebays;
• DIS-3: Stand-alone reinforced concrete CCBs (adjacent to the existing Clearwell); and
• DIS-4: New In-Vessel UV (Ultraviolet) Disinfection Facility.
The recommended alternative was DIS-3, stand-alone reinforced concrete CCBs that would be
located south of the existing Clearwell adjacent to the filter effluent (FE) overflow junction
structure. This alternative provides the most cost-effective long-term approach for disinfection.
Other benefits include better maintenance access for cleaning and storage capacity. While
alternative DIS-3 is the best approach, staff recommends postponing its implementation until
Phase 1 B of the project and continue using the FE pipe as a contact time contactor
supplemented by the recycled water storage to fulfill the Title 22 contact time requirements.
Recycled Water Storage Alternatives:
Since Phase 1A's main focus includes the provisions for safe, reliable storage of recycled water,
another technical memorandum further analyzed various storage options. Staff prepared and
developed BCEs on six alternatives:
• RWS-1: Repair or replacement of existing Clearwell liner and cover;
• RWS-2: Re-purpose the existing Forebays to be used as a Clearwell;
• RWS-3: Provide two new storage tanks using above-ground steel;
• RWS-4: Provide two new storage tanks using above-ground prestressed concrete;
• RWS-5: Status Quo, a do-nothing alternative; and
• RWS-6: Provide new storage using two concrete storage tanks with common wall
construction.
The recommendation is alternative RWS-3, to construct two new three-million-gallon above-
ground steel storage tanks instead of replacing the liner and covers on the Clearwell. These
tanks will be located inside the east cell of the Clearwell and connected to the final effluent
overflow junction structure. Benefits of this alternative include better maintenance accessibility,
the Clearwell structure will not be classified as an off-stream dam under the jurisdiction of the
State Division of Safety of Dams, and it is the most cost-effective compared to the other
alternatives. The tank location was based on the geotechnical site evaluation that revealed hard
rock formation under the existing Clearwell structure, which is surrounded by Bay mud.
October 17, 2019 Regular Board Meeting Agenda Packet- Page 31 of 82
Page 8 of 16
Attachment 3
Filter Plant and Clearwell Improvements - Phase 1A, District Project 7361
Estimated Capital Costs of Recommended Items
Total Construction Total Project
Cost Cost
Project Component
Electrical System Upgrades $7,500,000 $9,900,000
Clearwell Pump Station Renovation $1,700,000 $2,400,000
New Above Grade Steel Water Storage Tanks $15,200,000 $19,600,000
Filter Renovation (Filter No.1) $2,000,000 $2,700,000
Chemical Conditioning System Rehabilitation $600,000 $900,000
Total Capital Costs $27,000,000 $35,500,000
October 17, 2019 Regular Board Meeting Agenda Packet- Page 32 of 82
Item 5. (Updated Presentation)
Attachment 4
r.
FILTER PLANT AND CLEARWELL
IMPROVEMENTS - PHASE 1A
DISTRICT PROJECT (DP) 7361
�! Board Meeting
October 17, 2019
Jean-Marc Petit, P.E.
Director of Engineering and Technical Services
DP 7361 : FILTER PLANT AND CLEARWELL
IMPROVEMENTS PROJECT PROGRESSION TIMELINE
Business Case
East Cell Evaluations and
Board Authorized Requesting
Clearwell Cover 30%Design
Agreement with Completed Board to
Failure Stantec for Planning Authorize
of Filter Plant and Amendment for
Clearwell Project Final Design
2017 2018 DP 7361 2019 Phase 1A
Board Authorized Stantec Board
Recycled Water Submitted Authorized
Clearwell Repairs Planning Amendment for
Contingency Level Design Preliminary
Project Report Design
` 2
1
Key Filter and Clearwell
Clearrvell:
MechProject Issues and Phasing:
anical,
Structural,and Failing
Electrical Equipment;and East Cell Cleanvell
Clearwell Pump Station Cover and Liners
Pump Condition and Sizing
Combined Storag
t: and CIz Contact
Filter Capacity an � Basins Effcacy
Condition
Electrical Power
Distribution Voltage Supports Condition
and Reliability
t
Filter Building Hydraulic Bottleneck
Condition and Code _ into Forebays
Upgrades .' •
tom• � $'�
ir �w
Electrical Equipment;and ZL `* I• Phase
Applied Water Pump Station 'F - (j
Pump Condition and Sizing
Phase 1B '
--
PROPOSED PHASE 1 A SCOPE FOR
RECYCLED WATER (REW) PLANT FACILITI.-
Upgrade/Replace Electrical Gear
• New Clearwell Pump Station
(CWPS)Electrical Facility
• Replace Switchgear 43 to 480V
Add 1 Utility Water Pump
R •
ReW Storage
Two new Above Grade ;
Steel Storage Tanks i
rM
• Rehab 1 Filter col _ f
/
• Upgrade Chemical Feed
It - Upgrade/Replace Electrical Gear
• New CW Electrical Facility
• Modify Substation 40-2400V '
4
CENTRAL SAN
2
WHY NOW?
Meet Commitment for ReW Service
Electrical Safety and Reliability (arc flash protection)
We are a recycled water purveyor and provider (must
maintain a level of service to plant utility water and Zone 1
customers)
Reliability of producing recycled water (electrical, recycled
water storage, chemical feed, and filter production)
Phase 1A improvements are required now independently
from the implementation of the Water Exchange Project
and Concord Community Reuse Project
MANY CUSTOMERS RELY ON A
RELIABLE REW SUPPLY
Reliance on ReW by Users
Utility Water for the Treatment Plant
Zone 1 Customers
Maltby Pump Station = �-
Auto Truck Fill Station '=
Residential Fill Stations I
CENTRAL SAN
-w 4
3
ELECTRICAL POWER DISTRIBUTION CONCERNS
• Transformers are on the road to failure
based on oil analysis
• Improve arc flash safety for critical gears
to reduce safety risk to electricians -
• Recent failures in 12kV feeder and
Substation 40 -2400V bus bar highlight
concerns
• Medium voltage (2400V) power is
obsolete, inefficient, and unnecessary
for the motor sizes needed for current
and future demands
On January 16,2019,Substation 40 located at the
Filter Plant experienced a failure which triggered a
cascading series of events that led to a 16-minute,
plant-wide power failure.
�1 7
REW STORAGE/DELIVERY DEFICIENCIES
East Clearwell cell is out of
commission due to liner and cover
failure
• West Clearwell cell is now in
service with a floating cover a--� t -�
system in as a temporary solution
Currently, no redundant storage is -�
available to prevent ReW
interruption
East Clearwell cell cover triggered
some tears and cover failures in ;, t
December 2017. —
On July 7,2019,the East Clearwell cell cover ripped,
leading to its failure. This revealed excessive wear on
both the cover and liner in the East Clearwell cell.
4
NEW WEST CLEARWELL CELL TEMPORARY
COVER COMMISSIONED ON AUGUST 9, 2019
Sand bags are being used to
hold the existing liner in place.
BUSINESS CASE EVALUATION
FOR REW STORAGE
• RWS-1: Repairs or upgrades to the existing
Clearwell
• RWS-2: Repurpose the existing Forebays to be
used as a ---
WS-3:Provide new storage using two abov -
und steel tanks
• RWS-4: Provide new storage using two above-
ground prestressed concre{e storage tanks
• RWS-5:Status Quo, Do Nothing Alternative—
Operate West Clearwell cell with temporary
cover
• RWS-6:Provide new storage using two concrete
storage tanks with common wall -
• RWS-7: Provide one new 6 MG cast in place
concrete storage tank
RWS=Recycled Water Storage ` ?4
5
FILTER DEFICIENCIES
Proceed with rehabilitation of one
of the four filter under Phase 1A
• High solids loading produces short-filter
runs requiring frequent backwashes
and limits production capacity
• Filter production capacity is limited �.
• Filter media and underdrains need
rehabilitation
• Filter underdrain is outdated and
subject to upsets of the gravel layer,
which must be rebuilt to correct
• Balance between filter production, net
filtration, and energy cost
• Filter effluent piping and control valves
are undersized
11
TOTAL PROJECT COST - PHASE 1A
Total Total
Project Component Construction Cost Project Cost
Electrical System Upgrades $7,500,000 $9,900,000
Clearwell Pump Station Renovation
$1,700,000 $2,400,000
New Steel Storage Tanks $15,200,000 $19,600,000
Filter • $2,000,000 $2,700,000
Chemical Conditioning System Rehabilitation $600,000 $900,000
• $27,000,000 $35,500,000
12
6
PROJECT ALTERNATIVES/CONSIDERATIONS
The Board could consider several alternatives for the Filter Plant
and Clearwell Improvements Project— Phase 1A, as follows:
Alternative 1: Further split Phase 1A project into three smaller
projects and spread their construction over several fiscal years
Alternative 2: Proceed with Sub-Project: Construct upgrades to
Clearwell Pump Station and electrical distribution systems,
including conversion from 2400V to 480V; postpone storage and
filter rehabilitation
Alternative 3: Status Quo - Do Nothing Alternative
These alternatives are not recommended.
13
CENTRAL SAN
RECOMMENDED BOARD ACTIONS
Staff recommends the following:
Authorize the General Manager to amend an existing
professional services agreement with Stantec
Consulting Services, Inc. to increase the agreement
ceiling from $1,540,000 to $3,078,000 for final design of
the Filter Plant and Clearwell Improvements - Phase 1A,
District Project 7361
CENTRALSAN
7
QUESTIONS
15
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