HomeMy WebLinkAboutStantec WRRF Tertiary Filter VE and Revised Preliminary Design Task Order 11281.d PO 23-0199 Mayor Robert E. Simison
Wil I DIAN� City Counc Members
Joe Berton
John Overton
Public Works Luke Cavener
Brad Hoaglun
Department Jessica Perreault
Liz Strader
TO: Mayor Robert E. Simison
Members of the City Council
FROM: David Briggs, P.E., P.M.P.
DATE: January 11, 2023
SUBJECT: TASK ORDER#11281.1) FOR THE WRRF TERTIARY FILTRATION
UPGRADE —VE REVISED PRELIMINARY DESIGN WITH STANTEC
FOR A NOT TO EXCEED AMOUNT OF $268,809.00 PURSUANT TO
THE MASTER AGREEMENT APPROVED BY CITY COUNCIL
OCTOBER 01, 2020
REQUESTED COUNCIL DATE:
I. RECOMMENDED ACTION
A. Move to:
1. Approve Task Order#11281.D with Stantec for the WRRF Tertiary Filtration
Upgrade — VE Revised Preliminary Design, for a not-to exceed cost of
$268,809.00.
2. Authorize the Mayor to sign the agreement
II. DEPARTMENT CONTACT PERSONS
David Briggs, PE, PMP -PM 208-489-0347
Clint Dolsby PE, Assistant City Engineer 208-489-0341
Warren Stewart, City Engineer 208-489-0350
Laurelei McVey, Director of Public Works 208-985-1259
III. DESCRIPTION
A. Background
The WRRF Tertiary Filtration Facilities Project is designed to reduce the effluent
phosphorus loadings to Five Mile Creek through installation of a tertiary
Page 1 of'4
membrane system. The WRRF is currently in year six of a ten-year NPDES
compliance schedule to reduce these loadings. As part of a previous Task Order
(TO1), Stantec progressed the tertiary filtration concept presented in the City's
2018 Wastewater Resource Recovery Facility Plan (WRRF) and submitted a
Preliminary Engineering Report(PER)to the Idaho Department of Environmental
Quality (DEQ). After Task Order TO was complete, the City indicated that the
estimated capital cost of the project exceeded the budget amount that the City had
dedicated for the tertiary facilities. Stantec volunteered to identify value
engineering (VE) ideas that may reduce or defer capital costs, thus allowing the
City to stay within, or as close to, the City's budget as practical.
B. Proposed Project
This project will validate the VE recommendations and confirm the findings and
decisions with the City. Stantec will provide engineering services to make
modifications to the preliminary design and likely reduce or defer capital cost by
several million dollars. Stantec will then incorporate the changes and update and
re-baseline the overall cost opinion.
C. Consultant Selection
Stantec was selected for this project due to their expertise in the design and
analysis of wastewater treatment plants and their work on similar projects
consisting of the same tertiary filtration technology that we are looking to utilize.
IV. IMPACT
A. StrategicImpact:
This project meets our mission requirements to identify and prioritize work to
anticipate, plan and provide public services and facilities that support the needs
of our growing community, ensure modern, reliable facilities, while maintaining
financial stewardship and maintaining the ability to meet the changing permit
limit requirements.
B. Service/Delivery Impact:
Implementing tertiary filtration at the WRRF will support departmental objectives
to develop and employ strategies that comply with current and pending National
Pollutant Discharge Elimination System Permit(NPDES).
C. Fiscal Impact:
Project Costs:
r Fiscal Year 2022
-------------------------------------------------------------------------------------------------------------------------------------------= ----------------------
Tertiary Filtration �--------------------------------------------- ,
$797,946.00
Preliminary Design (TO1)
`--------------------------------------------------------------- ------
Page 2 of'4
-----------------------------------------------------------------------------T------------------------------------------------------------------------------------------------------------------------------------
Survey Work $15,000.00
----------------------------------------------------------------------------------------------------------------------------------------------------------- -------------
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------:
WRRF Membrane Pre- $218,105.001
I Procurement--(- -T02)
-------------------------------------------------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 1 $1,031,051.001
r-----------------------------------------------------------------------------T---------------------------------------------------------------r-----------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Fiscal Year 2023
----------------------------------------------------------------------------- ----------------------------------------------------------------------------------------------------------------------------------
WRRF Tertiary Filtration Total $268,809.00
Upgrade—VE Revised
Preliminary Design
-- - - - - -- - -- --------------------------------------------------------------------------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total Project Cost $1,299,860.00
r------------------------------------------------------------------------------r---------------------------------------------------------------I I-------------------------------------------------------------------1.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
r------------------------------------------------------------------------------r---------------------------------------------------------------I I-------------------------------------------------------------------1.
L-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Project Funding
F----------------------------------------------------------------------r--------------------------------------------------------------------------------------------------------------------------------------------
FY 2022 Tertiary Filter (3590/96154) $1,500,000 1
Expansion
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
FY 2023 Tertiary Filter (3590/96154) $3,000,000
Expansion
r----------------------------------------------------------------------r-----------------------------------------------------------------------r-------------------------------------------------------------------
-------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------
FY 2024 Tertiary Filter (3590/96154) $13,000,000
Expansion
r------------------------------(proposed)----------------------------------------r------------------------------- --------------------------------r-------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
FY 2025 Tertiary Filter (3590/96154) $14,000,000
Expansion (proposed)
r----------------------------------------------------------------------r-----------------------------------------------------------------------r-------------------------------------------------------------------
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
FY 2033 Tertiary Filter (3590/96154) $1,500,000
Expansion (proposed)
r----------------------------------------------------------------------r-----------------------------------------------------------------------r-------------------------------------------------------------------I
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
r----------------------------------------------------------------------r--------------------------------------------------------------------------------------------------------------------------------------------
Total Funding $33,000,000.00 1
L----------------------------------------------------------------------L---------------------------------
V. ALTERNATIVES
No alternatives to this project at this time.
V1. TIME CONSTRAINTS
Page 3 qf'4
Council's approval will allow this project to continue towards completing design and
construction of the tertiary filtration facilities and meet the NPDES compliance date
of June 30, 2027.
VII. LIST OF ATTACHMENTS
Approved for Council Agenda:
Page 4 of'4
TASK ORDER NO. 11281.D
Pursuant to the
MASTER AGREEMENT FOR PROFESSIONAL SERVICES
BETWEEN
CITY OF MERIDIAN (OWNER) AND
STANTEC CONSULTING SERVICES, INC. (ENGINEER)
This Task Order is made this 7t" day of February, 2023 and entered into by and between the
City of Meridian, a municipal corporation organized under the laws of the State of Idaho,
hereinafter referred to as "Owner", and accepted by STANTEC CONSULTING SERVICES,
INC., hereinafter referred to as "Engineer" pursuant to the mutual promises, covenant and
conditions contained in the Master Agreement (Category 2a) between the above-mentioned
parties dated October 1 , 2020. The Project Name for this Task Order is as follows:
WRRF TERTIARY FILTER VE VALIDATION &
REVISED PRELIMINARY DESIGN
PROJECT UNDERSTANDING
The Engineer's scope of services, time of completion and compensation shall be as set forth
herein. This Task Order details ongoing design efforts for the City of Meridian's (City's)
Wastewater Resource Recovery Facility (WRRF) Tertiary Filtration Facilities Project (Project).
This TO will validate the recommendations of value engineering (VE) efforts previously
conducted to reduce Project capital costs. Once VE recommendations have been confirmed
and evaluated in accordance with this Task Order, Stantec will revise the preliminary drawings,
Preliminary Engineering Report, and the cost estimate that were previously developed as part
of TO 11281 .
For visual purposes, a decision flowchart (shown below) was developed to convey the work
being fed into, and the deliverables of this Task Order. Efforts preceding TO 11281 .D were
either completed or in progress as contracted as part of TO 11281 and TO 11281 .13.
TASK ORDER 11281.D—WRRF TERTIARY FILTER VE VALIDATION& REVISED PRELIMINARY DESIGN Page 1 of 7
Stantec Consulting Services, Inc.
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SCOPE OF WORK
Task 1 : VE Validation and Revised Preliminary Design
1.1 Project Management and Coordination
The project management and coordination task for this TO 11281 .D is generally assumed to
cover the duration of this TO only and will be merely a supplement to the ongoing TO 11281 .13
effort. This task will include:
1.1.1 Internal Team Coordination
Stantec will meet with design team leads on a bi-weekly basis to coordinate discipline
status, identify risks, and provide a forum for issues or questions that need to be
communicated or coordinated with the City or that need further attention within the
design team.
1.1.2 Progress Tracking and Reporting
Only minimal additional effort needed.
Assumptions-
• Additional progress reporting meetings and notes are not needed and are as scoped in
TO 11 281 .B.
• Change logs and other documentation requested by the City will be kept and
maintained on a Stantec Microsoft Teams SharePoint site. The SharePoint site will be
available for the City and Stantec staff and be used for shared and transfer documents.
TASK ORDER 11281.D—WRRF TERTIARY FILTER VE VALIDATION& REVISED PRELIMINARY DESIGN Page 2 of 7
Stantec Consulting Services, Inc.
1.2 Validation of Preferred VE Alternatives
The services to validate the City's preferred VE alternatives are as identified below.
1.2.1 Filtration Capacity Phasing Evaluation
A phasing analysis of future filtration capacity will be conducted and will examine
WRRF projected flows between 2023 and 2040. This activity is intended to determine
how much capacity can be deferred by the City as a cost savings measure. Stantec will
look at a range of flow scenarios. These scenarios will be bounded by flow projections
from the 2018 Facility Plan (lower flow boundary) and flow projections based on a
sustained annual growth in flow of 4.7 percent (upper flow boundary). The annual flow
growth rate of 4.7 percent is based on observed WRRF flow data between 2016 and
2021 .
Based on the projected flows, Stantec will assess required membrane system capacity.
Stantec will consider the design implications of constructing a membrane system that
does not meet 2040 design flow conditions, and the triggers for future membrane
system upgrade(s) that would be required to increase membrane system capacity in
later years. Stantec will look at these improvements both with and without equalization
to optimize system sizing on a cost basis for this current Project.
Finally, Stantec will look at permit risks that are related to membrane system capacity.
This risk analysis will be limited to the City's potential to exceed the NPDES
phosphorus limits. Inputs for determining risk will include the assumed annual rate of
WRRF flow growth, sizing of the membrane system, timing of future membrane
capacity expansion, and the sizing of the equalization tank to mitigate peak flow
events.
Outcomes and recommendations from the evaluation will be presented by Stantec to
the City at a workshop. At this workshop, Stantec will outline methodology, capacity
phasing model inputs, and the permit-related risks associated with the variability of
these inputs. It is assumed that the City will decide the annual growth rate for future
WRRF flow and confirm if equalization will be excluded or deferred from the initial
design. Stantec will document the decisions in meeting minutes with presentation
information included as attachments. The evaluation will be summarized in a draft
technical memorandum (TM), which Stantec will finalize after City review.
1.2.2 Reuse Pump Station Evaluation
During the VE effort, an alternative was proposed to repurpose the existing reuse
facilities (existing reuse tanks and pump station). Existing reuse tanks could be used for
equalization during peak flows, and the existing reuse pump station could be used to
convey secondary flows to the new tertiary filtration system and feed the equalization
tanks if and when constructed. This Task 1 .2.2 will include a condition assessment and
evaluation of the existing reuse pump station, with a feasibility analysis and retrofit cost
estimate and comparison to the existing pump station layout and cost should the retrofit
be deemed feasible. The evaluation effort for the existing reuse tanks is included as
Task 1 .2.3.
TASK ORDER 11281.D—WRRF TERTIARY FILTER VE VALIDATION& REVISED PRELIMINARY DESIGN Page 3 of 7
Stantec Consulting Services, Inc.
The pump station condition assessment will include review of record drawings, interview
of operators, site inspections/observations of existing structures, and review of existing
equipment to determine general remaining useful life expectations. It is assumed that
the review of existing structures will take a maximum of one-half day with two Stantec
staff conducting the onsite evaluation. The condition assessment will not include an
invasive structural inspection.
If the existing reuse pump station retrofit is deemed infeasible or is not lower in capital
costs in comparison to a new pump station, Stantec will evaluate and prepare cost
estimates for up to two siting locations for the new pump station. The siting locations will
either be adjacent to the new Tertiary Filtration Membrane Building (Membrane
Building) or adjacent to future equalization tanks.
Stantec will also prepare life cycle considerations for the City to reference when making
these decisions for either new or repurposed pump station selection. The evaluation will
be summarized in a draft TM along with a review meeting prior to TM finalization;
decisions from the review meeting will be documented in the meeting notes. It is
assumed that this meeting will be combined with the Task 1.2.3 review meeting.
1.2.3 Reuse Tank Equalization Evaluation
The preliminary design documents delivered to the City in Fall 2022 include a below-
grade concrete equalization tank located under the new Membrane Building. The
purpose of the equalization tank is to shave peak secondary effluent flows to the tertiary
filtration system, thereby reducing required membrane capacity. The City has decided to
decouple the equalization tank from the new Membrane Building and potentially defer
any equalization to a future project. If the reuse pump station evaluation (Task 1.2.2)
determines the reuse pump station will not be retrofitted, it is assumed that the existing
reuse steel tanks will not be used for equalization and new tanks will be needed in the
future. This task will then focus on siting new tanks. If the existing reuse pump station
can be repurposed to feed the new membrane tertiary filtration system, this evaluation
will consider either repurposing the existing 500,000-gallon reuse storage tanks or
providing greenfield above-grade storage tanks for equalization. As part of any
consideration to use the reuse storage tanks, Stantec will conduct site work to observe
tank conditions. It is assumed that Stantec's site assessment will include visual
observations of the tank's exterior and interior components only, and the condition
assessment will require two Stantec staff. It is also assumed that the City will fully drain
the tanks to allow Stantec staff to perform inspection activities. For the remainder of the
evaluation, Stantec will combine field data with the following: City-provided record
drawings, other historical tank operation and maintenance records, and City staff
interview information about the tanks. If more data or investigation activities are required
to determine tank integrity, this will be completed under a separate future contract.
For all scenarios, Stantec will evaluate the financial costs and benefits of providing
equalization as part of this Project or deferring to a later (future) project. Alternatives will
be evaluated in terms of both Class 5 capital cost along with general life cycle cost
expectations. Stantec will couple the cost analysis efforts with an evaluation of the
technical advantages and disadvantages of each option. Stantec will also consider
TASK ORDER 11281.D—WRRF TERTIARY FILTER VE VALIDATION& REVISED PRELIMINARY DESIGN Page 4 of 7
Stantec Consulting Services, Inc.
varying capacities and build upon the recommendations presented in the capacity
phasing evaluation (Task 1 .2.1). A recommendation for the preferred equalization
alternative will be provided to the City and summarized in a draft TM. A review meeting
will be held as part of the decision-making process and held prior to TM finalization. It is
assumed that this meeting will be combined with the Task 1 .2.2 review meeting.
1.2.4 Coagulant Storage Relocation Evaluation
Stantec will evaluate the option to repurpose the existing Tertiary Filter Building No. 4
for coagulant storage in lieu of Chem. Building No. 3. This evaluation will consider
retrofit potential, chemical system space requirements, construction staging, chemical
code requirements, demolition, and future operations and maintenance along with a
Class 5 cost estimate for comparison to two other alternatives (expansion of the existing
Dewatering Facility or construction of a new Chemical Building No. 3) as presented in
the design drawings in the existing preliminary design. The evaluation will be
summarized in a draft TM. Prior to TM finalization, Stantec will hold a review meeting
with the City where the City will select the preferred alternative for chemical coagulant
storage. It is assumed that the review will be part of the pump station and equalization
review meeting.
1.2.5 Validation of Other VE Recommendations
The VE analysis identified other recommendations that will reduce capital costs for the
Project. The following revisions will be confirmed and incorporated into the final design:
• Transformer Relocation
• Use of Pre-engineered Metal Buildings (PEMBs); for this confirmation, Stantec
will validate cost by acquiring PEMB cost estimates from qualified vendors.
The confirmation of these cost savings alternatives will be summarized in a draft TM. A
review meeting will be held as part of the decision making and prior to TM finalization. It
is assumed that the review will be part of the pump station and equalization review
meeting.
1.3 Revised Preliminary Design
Stantec will take the City's decisions from the VE validation effort and update the preliminary
design drawings to a level that is sufficient for an updated submittal to Idaho Department of
Environmental Quality (DEQ) and so that the OPCC can be revised. The assumed changes to
the design include:
• Eliminate concrete equalization tank below the Membrane Building with considerations
for future equalization connection (retrofitted reuse tanks or new above-grade tanks); it
is assumed that equalization will be deferred and not included in this Project.
• Update the design of the Membrane Feed Pump Station (dimensions of wet well,
number of pumps, etc.). For design effort, it is assumed that the Membrane Feed
Pump Station will be a part of the Membrane Building as shown in the preliminary
design documents.
TASK ORDER 11281.D—WRRF TERTIARY FILTER VE VALIDATION& REVISED PRELIMINARY DESIGN Page 5 of 7
Stantec Consulting Services, Inc.
• Reduce thickness of the Membrane Building concrete floor from the elimination of the
subsurface equalization tank.
• Revise Membrane Building to be a pre-engineered metal building.
• Resize the Membrane Building to adjust for below grade piping, electrical conduit
routing, and other building adjustments associated with VE efforts and outcomes of
this Task Order.
• Eliminate Chemical Building No. 3.
• Retrofit the Tertiary Filter No. 4 building for coagulant storage (including demolition of
existing AquaDiamond cloth media filters and addition of chemical storage and feed
system).
Revised Preliminary Design Assumptions:
• All drawings impacted by the revised preliminary design will be updated.
• Draft revised drawings will be prepared and submitted to the City for review.
• A meeting will be held with the City to review the revised drawings prior to moving
forward with final design drawings.
1.4 Update OPCC
Stantec will take the updated preliminary design drawings and revise the Class 3 Opinion of
Probable Construction Cost (OPCC) that was developed as part of the Preliminary Design
effort. This update to the OPCC will be based on the revised drawings developed during Task
1 .3.
1.5 Update PER and DEQ Coordination
Upon completion and confirmation of the VE alternatives and associated design changes,
Stantec will meet with the DEQ to determine procedures for amending the Preliminary
Engineer Report (PER) that was developed by Engineer previously and has been previously
approved by DEQ. It is assumed that this PER revision is not a comprehensive revision, but
rather a standalone amendment to the original PER. The amendment will identify what design
criteria have changed and how these changes impact the phasing of the tertiary filter
improvements. The amendment will be submitted with revised preliminary drawings to confirm
continued DEQ approval.
ASSUMPTIONS
• Project management tasks will generally be covered through TO 11281 .13 services with
only minor PM effort needed as part of TO 11281 .D.
• This work will be performed in parallel to the tertiary filter pre-purchase effort
• These efforts will precede Final Design.
• Flow projections by others from past planning efforts will be used for this evaluation;
Stantec will not validate these projections. The tertiary filtration sizing, capacity
TASK ORDER 11281.D—WRRF TERTIARY FILTER VE VALIDATION& REVISED PRELIMINARY DESIGN Page 6 of 7
Stantec Consulting Services, Inc.
analysis, and the anticipated dates where projected flows necessitate future expansion
are best estimates only. Stantec will base evaluation efforts on provided data, the 2018
Facility Plan, and future flow estimates. The City will make the ultimate decision on
filtration expansion phasing and the level of risk the City is willing to accept to achieve
short-term capital cost reductions.
• The evaluation efforts of this Task Order will address deferrals and design changes
from Engineers previous work that may reduce WRRF capacity. The validity of these
evaluations relies heavily on construction scheduling and City growth rates. This is an
element of risk for items that are largely outside the control of both the City and
Engineer.
• Engineer and the City will prepare and negotiate the Final Design task order prior to the
revised preliminary design (Task 1 .3) being complete to keep the design progressing.
This will allow for Final Design to be complete to allow contractor bidding in late 2023.
TIME OF COMPLETION and COMPENSATION SCHEDULE
COMPENSATION AND COMPLETION SCHEDULE
Task Description Due Date (estimated) Compensation
1.1 Project Management and • May 9, 2023
Coordination $10,017
1.2 Validation of Preferred VE ■ May 9, 2023
Alternatives $108,107
1.3 Revised Preliminary Design ■ April 25, 2023 $127,486
1.4 Update OPCC • May 9, 2023 $13,523
1.5 Update PER and DEQ Coordination ■ March 14, 2023 $9,676
TASK ORDER TOTAL: $268,809.00
The Not-To-Exceed amount to complete all services listed above for this Task Order is Two
Hundred Sixty-Eight Thousand, Eight Hundred Nine Dollars ($268,809). No compensation will
be paid over the Not-to-Exceed amount without prior written approval by the Owner in the form
of a Change Order. No travel or expenses will be reimbursed through this agreement. All
costs must be incorporated in the individual tasks within the Compensation and Completion
Schedule above.
CITY OF MERIDIAN STANTEC CONSULTING SERVICES, INC.
Nick Smith Digitally signed by Nick Smith
BY: On File BY: Date:2023.01.1910:21:08-0700'
KEITH WATTS, Purchasing Manager NICK SMITH, P.E., Principal Project Manager
Dated: 2-7-2023 Dated: 1/19/2023
Approved by Council: 2-7-2023 City Project Manager:
David Briggs
TASK ORDER 11281.D—WRRF TERTIARY FILTER VE VALIDATION& REVISED PRELIMINARY DESIGN Page 7 of 7
Stantec Consulting Services, Inc.
(:�4`WEDIANI."_*�Nio)
Purchase Order 2/7/2023 23-0199
Attention: David Briggs
CITY OF MERIDIAN Billing Attn: Finance
33 Ave
33 EAST BROADWAY AVE. Meridian,
IDa
Address: 83642
MERIDIAN,ID 83642
(208) 888-4433
Shipping 33 E Broadway Ave.
Vendor Address: Address: Ste. 200
Meridian, ID 83642
STANTEC CONSULTING SERVICES INC.
13980 COLLECTIONS CENTER DRIVE
CHICAGO, IL 60693 Shipping Method: Contractor
FOB: Destination Pre-Paid
Description Unit Quantity Unit Price Total
23-0199 TO 11281.d WRRF Tertiary Filter VE & Prelim. Design Dollar 268809.00 1.00 268,809.00
Purchase Order Total: $268,809.00
Purchasing
Manager:
Special Instructions
Task Order 10281.d WRRF Tertiary Filter VE & Revised Preliminary Design approved by Council 2/7/2023. Not-To-Exceed
$268,809 60-3590-96154-11281.d Ticket#87112