Contract - Plummer and Associates, Inc. - 7/24/2025 STATE OF TEXAS §
COUNTY OF WILLIAMSON §
SUPPLEMENTAL CONTRACT NO. 2
TO CONTRACT FOR ENGINEERING SERVICES
FIRM: PLUMMER AND ASSOCIATES,INC. ("Engineer")
ADDRESS: 8911 N. Capital of TX Hwy, Building 1, Suite 1250,Austin,TX 78759
PROJECT: BCRWWS East Wastewater Treatment Plant Expansion to 40MGD
This Supplemental Contract No. 2 to Contract for Engineering Services is made by and between
the City of Round Rock, Texas, hereinafter called the "City" and Plummer and Associates, Inc.,
hereinafter called the"Engineer."
WHEREAS, the City and Engineer executed a Contract for Engineering Services, hereinafter
called the "Contract," on the 2nd day of November, 2023 for the BCRWWS East Wastewater
Treatment Plant Expansion to 40 MGD Project in the amount of$6,072,849.00; and
WHEREAS,the City and Engineer executed Supplemental Contract No. 1 on November 7, 2024
to amend the scope of services and to increase the compensation by $1,256,618.00 to a total of
$7,329,467.00; and
WHEREAS,it has become necessary to amend the Contract to modify the provisions for the scope
of services and to increase the compensation by $567,307.00 for the 40 MGD Expansion
($338,513.00)and Rehabilitation($228,794.00) for a project total of$7,896,774.00;
NOW THEREFORE,premises considered, the City and the Engineer agree that said Contract is
amended as follows:
I.
Article 1, City Services and Exhibit A, City Services shall be amended as set forth in the attached
Addendum To Exhibit A.
II.
Article 2, Engineering Services and Exhibit B,Engineering Services shall be amended as set forth
in the attached Addendum to Exhibit B. Exhibit C, Work Schedule shall be amended as set forth
in the attached Addendum to Exhibit C.
Supplemental Contract Rev.06/16
0199.202334;4920-9339-8608 84275
-� A oas- Igo
III.
Article 4, Compensation and Exhibit D, Fee Schedule shall be amended by increasing by
$567,307.00 the maximum amount payable under the Contract for a total of$7,896,774.00, as
shown by the attached Addendum to Exhibit D.
IN WITNESS WHEREOF,the City and the Engineer have executed this Supplemental Contract
in duplicate.
[signature pages follow]
Supplemental Contract Rev.06/l6
0199.202334;4920-9339-8608 84275
2
PLUMMER AND ASSOCIATES, INC.
By:
ija
Malty o 2 T y`a-(,o, p 2CJ PA'-
h/2 G Jo Z S
Date
Supplemental Contract Rev.06/l 6
0199.202334;4920-9339-8608 84275
3
CITY OF ROUND ROCK APPROVED AS TO FORM:
By:
Craig Aai yor S ep a le L. Sandre, City Attorney
1/24/01)15
Date
Supplemental Contract Rev.06/16
0199.202334;4920-9339-8608 84275
4
Brushy Creek East Regional WWTP
40 MGD Expansion Detailed Design - Additional
' PLUMMER 0982-018-01
ADDENDUM TO EXHIBIT A
City Services
The City of Round Rock will furnish to the Engineer the following items/information:
• Attend kickoff meeting and progress meetings as needed.
• Designate a person to act as City's representative with respect to the services to be
performed or furnished by the Engineer. This representation will have authority to
transmit instructions, receive information, interpret, and define City's policies and
decisions with respect to engineering services.
• Provide all criteria and full information as to City's requirements for the project,
including objectives and constraints and furnish copies of all standards which City will
require to be included in the project.
• Assist Engineer by placing all available information pertinent to the Project, including
previous information and any other data relative to the Project at the ENGINEER's
disposal.
• Provide digital design files or any records available which would assist in the completion
of the project development.
• Timely review and comment on the draft report, drawings, and technical specifications.
Exhibit A
1 of 1
Brushy Creek East Regional WWTP
40 MGD Expansion Project
Additional Detailed Design Amendment
ADDENDUM TO EXHIBIT B.1
Engineering Services
Engineering Services to be provided for the Additional Detailed Design Amendment of the 40 MGD
Expansion project:
Background
The Brushy Creek East Regional Wastewater Treatment Plant(Plant) is owned by the Brushy Creek Regional
Wastewater System (BCRWWS), who are the Cities of Round Rock, Cedar Park, and Austin (Partners). The
City of Leander will become a part owner on completion of the current 10 MGD expansion project to the
Plant. The engineering team, led by Prime consultant Plummer Associates, consultants Freese & Nichols,
and K. Friese & Associates (Engineer) designed the most recent 10 MGD expansion, which is currently in
the construction phase.The current design project includes expanding the treatment capacity by a further
10 MGD, increasing the Plant's capacity from 30 MGD to 40 MGD .
SCOPE —Additional Detailed Design Services
Under the Expansion project, the additional detailed design services will be for the additional Dewatering
Equipment (BFP), Conveyers and Sludge Hoppers, Piping and Supports, Structural Modifications to the
Thickening Building Canopy and Foundation Modifications to the Hopper, Thickening Building Internal
modifications and Electrical additions (Switch Gear and BFP Addition).
Treatment Areas
0 General: Incorporate general information about the amendment elements listed below including
site location, project and future site plan, soil boring locations, general construction notes, pipe materials
and piping notes, abbreviations, instrumentation legend, process diagrams, treatment unit's summary,
schematics, and P&IDs, 3D site plans and other plant-wide information.
1900 Standard Details: Provide standard construction details for treatment facilities listed below.
Instrumentation: Provide instrumentation to support the new and modified treatment facilities listed
below. Existing instruments in areas of the plant not being modified will not be changed.
The existing Ignition system will have new screens added for operation and alarming of the new process
equipment, including modifications. Updated PLC control panels and design will be included.
100 Civil/Sitework and Yard Piping:
NO SCOPE REQUIRED
1300 Biosolids Handling: Conversion of"Thickening Building" into additional dewatering facility, replacing
GBTs with BFPs. Sludge will be conveyed to this building by new progressive cavity pumps at the sludge
Page 1 of 8
Brushy Creek East Regional WWTP
40 MGD Expansion Project
Additional Detailed Design Amendment
pumping station,dewatered sludge will be lifted by new conveyor belts to an elevated hopper,to match the
existing dewatering building for truck hauling offsite (composting or landfill). Additional NPW booster
pumps, polymer piping and pumps, containment pad and elevated structural walkways will be required.
Structural design to provide foundation (piers) and pad to support the elevated hopper, access stairs and
roof covering to shelter the units from the elements(to closely match existing hopper structure). Power and
controls design to incorporate the additional dewatering facility and ancillaries (equipment, water, sludge
conveyors, chemicals etc).The conceptual design is provided in the attached sketches and figures.
Tasks:
The scope of work is further defined in the following tasks including:
Task 1. Project Management
Task 2. Design
Task 3. Equipment Preselection (no additional scope required)
Task 4. Field Surveys (no additional scope required)
Task S. State and Local Approvals (no additional scope required)
Task 6. OPCC and Construction Schedule
Task 7. Quality Review
Task 8. Bidding Assistance (no additional scope required)
Task 9. Supplemental Services (no additional scope required)
Task 1. Project Management
The ENGINEER includes PM effort for this under the budget due to the extension of the design
project timeline and require additional coordination and oversight.
Task 2. Design
Design Task includes 30%, 60%-90% and 100% design subtasks. OPCC and Quality Review are
separate tasks.
2.1. 30%Design
30% design includes preliminary discipline design tasks. The focus of the 30% design set will be
finalization of process details,treatment unit sizing,equipment sizing, and controls concepts. The
purpose of this task is to use the data and guidelines developed in the Preliminary Engineering
Report, and further develop the approved design concepts,develop the PROJECT design to achieve
a true"design freeze" at the conclusion of 30%Design.The end products from this task will consist
of 30% Discipline Design Basis of Memoranda with a set of drawings which will provide sufficient
information for PARTNERS and agency review and design team coordination and review. Specific
work activities and deliverables from this task are as identified below.
2.1.1. Civil and Site Development
[No additional scope required]
2.1.2. Architectural
• Review existing design of dewatering building architectural elements for concepts.
2.1.3. HVAC
[No additional scope required]
Page 2 of 8
Brushy Creek East Regional WWTP
40 MGD Expansion Project
Additional Detailed Design Amendment
2.1.4. Process Mechanical
30% Design for process mechanical will consist of the following:
• Select equipment type and determine size/capacity/redundancy of treatment unit processes and
ancillary systems.
• Select process mechanical piping, sizes and materials.
• Review capacity of existing processes and equipment to remain in service. Assign capacity to existing
processes.
• Coordinate with l&C to prepare process flow diagrams and P&IDs.
• Update process flow diagrams for liquid treatment process and solids treatment process.
Develop process control narratives.
• Develop system curves for the following pumping/blower applications prior to equipment preselection:
• Sludge Pumps
2.1.5. Structural
30% Design work for structural will consist of the following activities.
• Coordinate with Geotechnical sub consultant, an amendment to the original Report shall be required to
confirm foundation assumptions for the new structural components associated with the elevated sludge
hopper.
• Develop initial structural demolition plans.
• Coordinate with architectural discipline on the selection of building concepts. Consult with lead process
mechanical engineer on building/structure layouts.
• Select design concepts and materials for handrails, stairs, and gratings
• Develop building foundation and structure concepts based on schematic building layouts.
• Review concepts and draft work products with and seek approval from quality control reviewer.
Page 3 of 8
Brushy Creek East Regional WWTP
40 MGD Expansion Project
Additional Detailed Design Amendment
2.1.6. Electrical
30% Design work for electrical will consist of the following.
• Prepare overall one-line diagram and individual one-line diagrams for each switchboard and motor
control center for proposed facilities.
• Determine quantity and locations of electrical distribution equipment, including motor control centers,
switchboards and panelboards.
• Coordinate with lead process mechanical engineers to size equipment motors.
• Prepare load calculations.
• Establish preferred voltages for power distribution and utilization equipment.
• Coordinate with other disciplines (architectural, process/mechanical) to resolve code compliance
issues specific to these disciplines.
2.1.7. Instrumentation and Control
30% Design work for the instrumentation and control will consist of the following activities.
• Document and develop the existing controls system architecture, include fiber optic routing, network
configuration,the location of PLCs, computers, etc.
• Document existing control system panel layout, including input/output terminal locations, panel door
mounted control stations and internally mounted field instruments.
• Document and develop existing PLC I/O listing
• Document and develop Process& Instrumentation Diagrams (P&IDs) of the existing processes that will
remain in service. For those modified processes the P&IDs will reflect the modifications, including new
instrumentation and equipment.
2.1.8. 30%Design Document Completion
• Prepare 30% Discipline Design Basis Memoranda (including drawings).
• Complete 30%OPCC—See Task 6.
• Complete 30% quality review—See Task 7.
2.1.9. 30%Design Review
CONSULTANT will conduct a virtual meeting with the PARTNERS's personnel to review the work
products from subtasks 2.1.1 through 2.1.9 as defined above.The workshop will be held at the Plant.
Final notes from the workshop and the work products as defined above will be assembled in the 30%
Design report and submitted to the PARTNERS.
Meetings:None
Deliverables: 30%Discipline Design Basis Memoranda including Drawings(electronic&J printed
Page 4 of 8
Brushy Creek East Regional WWTP
40 MGD Expansion Project
Additional Detailed Design Amendment
copies), Process Modelling Technical Memorandum
2.2. 60%-90%Design
Elements identified in the Treatment Areas on page 1 and 2 of this scope amendment will be
designed in line with the 60/90%design sub-tasks established in the original scope.
Meetings:60%-90%Design Review Workshop(Virtual]
Deliverables: Meeting materials and notes, and 60%-90%Design Drawings(electronic&five(5)
printed copies), and Specifications&DBMs(electronic).
2.3. 100%Design
Elements identified in the Treatment Areas on page 1 and 2 of this scope amendment will be
designed in line with the 100% design sub-tasks established in the original scope.
2.3.1. Final Contract Document Completion
CONSULTANT will modify the contract documents to reflect agreed upon final review comments
from the PARTNERS, applicable regulatory agencies and CONSULTANT's quality control review
team. The final documents will then be submitted to the PARTNERS.
• Prepare final construction drawings (using the same disciplines as shown in Task 2.3).
• Prepare final technical specifications.
2.3.2. Final Design Report Completion
The Design Report will be finalized based on updates made during the design process. Draft and
Final Design Reports will be submitted. As this is not part of the contract documents, it will be
submitted after conformed documents are submitted.
Meetings:N/A
Deliverables: 100%Signed and Sealed Design Drawings and Specifications(electronic&printed
copies)
Task 3. Equipment Preselection
[No additional scope required, existing budget will cover any preselection phase work.]
Task 4. Field Surveys
[No additional scope required]
Task 5. State and Local Approvals
[No additional scope required]
Task 6. OPCC and Construction Schedule
OPCC and Construction Schedule of the amendment scope will be added in line with the original scope.
Meetings:N/A
Deliverables:Equipment Preselection, 30%, 60%-90%, and 100%OPCC
Page 5 of 8
Brushy Creek East Regional WWTP
40 MGD Expansion Project
Additional Detailed Design Amendment
Task 7. Quality Review
Design for elements identified in the Treatment Areas on page 1 and 2 of this scope amendment will be
added to the quality review processes established in the original scope.
Meetings:Internal Quality Review meetings for 30%, 60%-90%Design
Deliverables:Quality Assurance Audit Log
Task 8. Bidding Assistance
[No additional scope required]
Task 9. Supplemental Services
[No additional scope required]
LIST OF ASSUMPTIONS
The following assumptions were used when developing the scope of service and estimating the
compensation to CONSULTANT. These assumptions are in addition to the scope and additional services set
forth in the scope of work:
1. All previous assumptions listed in prior scopes of work apply.
2. Concepts proposed were used to base the scope of work and associated fee on, these conceptual
understanding and layouts may change as detailed design progresses. If PARTNERS make additional
changes to the agreed design concept these may result in further design amendments.
3. Electrical and Instrumentation &Controls Systems:
3.1 The new instrumentation and control system will be based on the use of programmable logic
controllers. Monitoring of the plant status will be by The existing Ignition HMI system. New
screens will be added for the new process equipment. There will be several new PLC panels that
will receive programming during the construction phase. The existing Master Blower Control
Panel will require upgrades by Howden.
3.2 CONSULTANT will not perform the work of developing process control system software for
either the PLC or the PC interface as part of the design phase services.
4. PARTNERS PROVIDED SERVICES:
4.1 PARTNERS will provide to CONSULTANT all data in PARTNERS's possession relating to
CONSULTANT's services on the Project. CONSULTANT will reasonably rely upon the accuracy,
timeliness, and completeness of the information provided by the PARTNERS.
4.2 PARTNERS will make its facilities accessible to CONSULTANT for performance of its services and
will provide labor and safety equipment for such access. PARTNERS will perform, at no cost to
CONSULTANT, such tests of equipment, machinery, pipelines, and other components of
PARTNERS's facilities as may be required in connection with CONSULTANT's services.
4.3 PARTNERS will give prompt notice to CONSULTANT whenever PARTNERS observe or become
aware of development that affects the scope or timing of CONSULTANT's services, or of defect
in the work of CONSULTANT or the CONTRACTOR.
4.4 The PARTNERS shall examine information submitted by CONSULTANT and provide comments in
writing and provide decisions in a timely manner.
4.5 The PARTNERS shall furnish required information and approvals in a timely manner.
4.6 The PARTNERS shall cause all agreements with the CONTRACTOR to be consistent with
CONSULTANT's Agreement.
Page 6 of 8
Brushy Creek East Regional WWTP
40 MGD Expansion Project
Additional Detailed Design Amendment
List of Meetings and Deliverables
Task Meetings Deliverables
1.1 PMP and Kickoff • Project kickoff meeting/site visit • Baseline schedule
• Kickoff meeting materials and
a, notes
E
bo
1.2 Monthly • N/A • Progress Report in pdf format
c Monitoring
Co
Y 1.3 Subconsultant
• Internal Task Kickoff meetings,
• Management
• Internal design coordination • N/A
° meetings
a
1.4 Coordination • 2 coordination meetings • Meeting materials and notes
with Other Projects
1.5 Progress • Up to 4 progress/operations • Meeting materials and notes
Meetings meetings
• Meeting materials and notes
• 30% Discipline Design Basis
2.1 30% Design • 30% Design Review Workshop Memoranda including Drawings
(electronic)
o • Process Modelling TM
• Meeting materials and notes
• 60%-90% Design Review
ri 2.2 60%-90% Design Workshop • 60%-90% Design Drawings and
Specifications (electronic)
• 100%Signed and Sealed Design
2.3 100% Design • N/A Drawings and Specifications
(electronic)
c c
a o
a 3.1 Equipment . N/A • N/A
Preselection
u'
w v
rci a
-0 4.1 Topographic . N/A • N/A
a a) Survey
v an
4.2 Geotechnical • N/A • N/A
-oal To
c
> 5.1 State and Local
2 ° a Approvals • N/A • N/A
vi Q
• Equipment Preselection
• 30%OPCC
0 6.1 OPCC • N/A • 60%-90%OPCC
Lai
• 100%OPCC
Page 7 of 8
Brushy Creek East Regional WWTP
40 MGD Expansion Project
Additional Detailed Design Amendment
Y
In
Meetings Deliverables
• a, • Internal Quality Review meetings
N '5 7.1 Quality Review for 30%, 60% 90% Design • Quality Assurance Audit Log
to a)
c
—
• N/A • N/A
00
N
Q
Page 8 of 8
Brushy Creek East Regional WWTP
Rehab Project
Additional Detailed Design Amendment
ADDENDUM TO EXHIBIT B.2
Engineering Services
Engineering Services to be provided for the Additional Detailed Design Amendment of the Rehab project:
Background
The Brushy Creek East Regional Wastewater Treatment Plant(Plant)is owned by the Brushy Creek Regional
Wastewater System (BCRWWS), who are the Cities of Round Rock, Cedar Park, and Austin (Partners). The
City of Leander will become a part owner on completion of the current 10 MGD expansion project to the
Plant. The engineering team, led by Prime consultant Plummer Associates, consultants Freese & Nichols,
and K. Friese & Associates (Engineer) designed the most recent 10 MGD expansion, which is currently in
the construction phase. The current project includes rehabilitation of the existing infrastructure that was
constructed prior to the most recent expansion.
SCOPE —Additional Detailed Design Services
Under the Rehab project, the additional detailed design services will include, HVAC Mechanical rehabs to
the Thickening Building Components and addition of fans at the Dewatering Building, Structural
Modifications to UV 1 and UV 2 canopies adding a bridge crane. Electrical rehab for the UV Canopies and
HVAC, in addition to controls upgrades at Scum PS 1 &2, as well as more RAS Pumps at PS 2.
Treatment Areas
Expansion and Rehab Project
0 General: Incorporate general information about the amendment elements listed below including
site location, project and future site plan, soil boring locations, general construction notes, pipe materials
and piping notes, abbreviations, instrumentation legend, process diagrams, treatment unit's summary,
schematics, and P&IDs, 3D site plans and other plant-wide information.
1900 Standard Details: Provide standard construction details for treatment facilities listed below.
Instrumentation: Provide instrumentation to support the new and modified treatment facilities listed
below. Existing instruments in areas of the plant not being modified will not be changed.
The existing Ignition system will have new screens added for operation and alarming of the new process
equipment, including modifications. Updated PLC control panels and design will be included.
100 Civil/Sitework and Yard Piping:
NO SCOPE REQUIRED
Page 1 of 9
Brushy Creek East Regional WWTP
Rehab Project
Additional Detailed Design Amendment
631 Scum PS 1 & 2: Additional design to add in new duplex pump control panel with PV600 level
controller. New radar level, new submersible pressure transducer and one (1) Hi-Hi float. Only Ethernet
cable needed from new panel back to RAS/WAS PLC panel. Current conduits for discrete signals can be used
for Ethernet cable. Less configuration effort to get the PV600 unit going in comparison to additional
programming in the Schneider RAS/WAS PLC.
650 RAS/WAS Pump Station 2: Review of existing RAS pump data/curves (not in original scope) and
creation of new system curves. Design for rehabilitation/replacement of two(2)additional RAS pumps sized
per new system curve recommendations, with appropriate total dynamic head conditions (these will match
closer to Train 1).
870 UV 1 Complex: Modified design to include a canopy at the UV 1"area"to provide shade for electrical
equipment and UV modules,which were showing signs of heat degradation during the field inspection.The
canopy design shall include a suitable load rated bridge crane which can be used for removing the UV bulbs
(modules)for regular cleaning and maintenance from the channels.
880 UV 2 Complex:Additional design of canopy extensions to cover existing equipment and UV channels.
Design effort concept will focus on keeping the remaining canopies in place and additional supports and
covers of a similar material, design and height where possible (see attached concept sketches).
Additional HVAC design will be provided to replace the function of the old odor control bio media filter beds
(1&2)fans. New exhaust fan design will be included for both biosolids handling buildings to provide enough
air flow (air volume changes) required per NFPA"Unclassified" workspace with units operational.
Tasks:
The scope of work is further defined in the following tasks including:
Task 1. Project Management
Task 2. Design
Task 3. Equipment Preselection (no additional scope required)
Task 4. Field Surveys(no additional scope required)
Task 5. State and Local Approvals(no additional scope required)
Task 6. OPCC and Construction Schedule
Task 7. Quality Review
Task 8. Bidding Assistance (no additional scope required)
Task 9. Supplemental Services (no additional scope required)
Task 1. Project Management
The ENGINEER includes PM effort for this under the budget due to the extension of the design
project timeline, and require additional coordination and oversight.
Task 2. Design
Design Task includes 30%, 60%-90% and 100% design subtasks. OPCC and Quality Review are
separate tasks.
2.1. 30%Design
[No additional scope required]
2.1.1. Civil and Site Development
[No additional scope required]
Page 2 of 9
Brushy Creek East Regional WWTP
Rehab Project
Additional Detailed Design Amendment
2.1.2. Architectural
[No additional scope required]
2.1.3. HVAC
30% Design for HVAC will consist of the following:
• Review HVAC criteria and code requirements;
• Develop calculation for initial process building/structures
• HVAC modifications required due to new equipment.
• Select type of ventilation system to be used in process buildings including hazardous material areas(inlet
air tempered with both inlet and outlet fans, simple exhaust fan system).
• Select type of air conditioning system to be used in personnel spaces(variable air volume system, zoned
constant air volume system).
• Coordinate with the architectural discipline to establish design R-values for exterior walls.
• Coordinate with Process Mechanical to determine overall odor control requirements for the PROJECT.
Confirm adequate air changes provided for equipment/occupied spaces and use of existing facilities.
• Review concepts and draft work products with and seek approval from quality control reviewer.
2.1.4. Process Mechanical
30% Design for process mechanical will consist of the following:
Develop process control narratives.
• Develop system curves for the following pumping/blower applications prior to equipment preselection:
• Return Activated Sludge Pumps
2.1.5. Structural
30% Design work for structural will consist of the following activities.
• Perform a structural evaluation of existing facilities that require retrofit/rehabilitation to identify areas
where the facilities may need additional reinforcement or modifications.
• Coordinate with architectural discipline on the selection of building concepts. Consult with lead process
mechanical engineer on building/structure layouts.
• Select design concepts and materials for canopies, handrails, stairs, and gratings,
Page 3 of 9
Brushy Creek East Regional WWTP
Rehab Project
Additional Detailed Design Amendment
• Develop building foundation and structure concepts based on schematic building layouts.
• Review concepts and draft work products with and seek approval from quality control reviewer.
2.1.6. Electrical
30% Design work for electrical will consist of the following.
• Prepare overall one-line diagram and individual one-line diagrams for each switchboard and motor
control center for proposed facilities.
• Determine quantity and locations of electrical distribution equipment, including motor control centers,
switchboards and panelboards.
• Coordinate with lead process mechanical engineers to size equipment motors.
• Prepare load calculations.
• Establish preferred voltages for power distribution and utilization equipment.
• Coordinate with other disciplines (architectural, process/mechanical)to resolve code compliance
issues specific to these disciplines.
2.1.7. Instrumentation and Control
30% Design work for the instrumentation and control will consist of the following activities.
• Document and develop the existing controls system architecture, include fiber optic routing, network
configuration,the location of PLCs, computers, etc.
• Document existing control system panel layout, including input/output terminal locations, panel door
mounted control stations and internally mounted field instruments.
• Document and develop existing PLC I/O listing
• Document and develop Process& Instrumentation Diagrams (P&IDs) of the existing processes that will
remain in service. For those modified processes the P&IDs will reflect the modifications, including new
instrumentation and equipment.
Page 4 of 9
Brushy Creek East Regional WWTP
Rehab Project
Additional Detailed Design Amendment
2.1.8. 30%Design Document Completion
• Prepare 30% Discipline Design Basis Memoranda (including drawings).
• Complete 30%OPCC—See Task 6.
• Complete 30%quality review—See Task 7.
2.1.9. 30%Design Review
CONSULTANT will conduct a virtual meeting with the PARTNERS's personnel to review the work
products from subtasks 2.1.1 through 2.1.9 as defined above.The workshop will be held at the Plant.
Final notes from the workshop and the work products as defined above will be assembled in the 30%
Design report and submitted to the PARTNERS.
Meetings:30%Design Review Workshop
Deliverables: Meeting materials and notes and 30% Discipline Design Basis Memoranda
including Drawings(electronic&]printed copies), Process Modelling Technical Memorandum
2.2. 60%-90%Design
Elements identified in the Treatment Areas on page 1 and 2 of this scope amendment will be
designed in line with the 60/90% design sub-tasks established in the original scope.
Meetings:60%-90%Design Review Workshop[Virtual]
Deliverables: Meeting materials and notes, and 60%-90%Design Drawings(electronic&five[5]
printed copies), and Specifications&DBMs(electronic).
2.3. 100%Design
Elements identified in the Treatment Areas on page 1 and 2 of this scope amendment will be
designed in line with the 100%design sub-tasks established in the original scope.
2.3.1. Final Contract Document Completion
CONSULTANT will modify the contract documents to reflect agreed upon final review comments
from the PARTNERS, applicable regulatory agencies and CONSULTANT's quality control review
team. The final documents will then be submitted to the PARTNERS.
• Prepare final construction drawings (using the same disciplines as shown in Task 2.3).
• Prepare final technical specifications.
2.3.2. Final Design Report Completion
The Design Report will be finalized based on updates made during the design process. Draft and
Final Design Reports will be submitted. As this is not part of the contract documents, it will be
submitted after conformed documents are submitted.
Meetings:N/A
Deliverables: 100%Signed and Sealed Design Drawings and Specifications(electronic&printed
copies)
Page 5 of 9
Brushy Creek East Regional WWTP
Rehab Project
Additional Detailed Design Amendment
Task 3. Equipment Preselection
[No additional scope required, existing budget will cover any preselection phase work.]
Task 4. Field Surveys
[No additional scope required]
Task 5. State and Local Approvals
[No additional scope required]
Task 6. OPCC and Construction Schedule
OPCC and Construction Schedule of the amendment scope will be added in line with the original scope.
Meetings:N/A
Deliverables:30%, 60%-90%, and 100%OPCC
Task 7. Quality Review
Design for elements identified in the Treatment Areas on page 1 and 2 of this scope amendment will be
added to the quality review processes established in the original scope.
Meetings:Internal Quality Review meetings for 30%, 60%-90%Design
Deliverables:Quality Assurance Audit Log
Task 8. Bidding Assistance
[No additional scope required]
Task 9. Supplemental Services
[No additional scope required]
Page 6 of 9
Brushy Creek East Regional WWTP
Rehab Project
Additional Detailed Design Amendment
LIST OF ASSUMPTIONS
The following assumptions were used when developing the scope of service and estimating the
compensation to CONSULTANT. These assumptions are in addition to the scope and additional services set
forth in the scope of work:
1. All previous assumptions listed in prior scopes of work apply.
2. Concepts proposed were used to base the scope of work and associated fee on, these conceptual
understanding and layouts may change as detailed design progresses. If PARTNERS make additional
changes to the agreed design concept these may result in further design amendments.
3. Electrical and Instrumentation &Controls Systems:
3.1 The new instrumentation and control system will be based on the use of programmable logic
controllers. Monitoring of the plant status will be by The existing Ignition HMI system. New
screens will be added for the new process equipment. There will be several new PLC panels that
will receive programming during the construction phase. The existing Master Blower Control
Panel will require upgrades by Howden.
3.2 CONSULTANT will not perform the work of developing process control system software for
either the PLC or the PC interface as part of the design phase services.
4. PARTNERS PROVIDED SERVICES:
4.1 PARTNERS will provide to CONSULTANT all data in PARTNERS's possession relating to
CONSULTANT's services on the Project. CONSULTANT will reasonably rely upon the accuracy,
timeliness, and completeness of the information provided by the PARTNERS.
4.2 PARTNERS will make its facilities accessible to CONSULTANT for performance of its services and
will provide labor and safety equipment for such access. PARTNERS will perform, at no cost to
CONSULTANT, such tests of equipment, machinery, pipelines, and other components of
PARTNERS's facilities as may be required in connection with CONSULTANT's services.
4.3 PARTNERS will give prompt notice to CONSULTANT whenever PARTNERS observe or become
aware of development that affects the scope or timing of CONSULTANT's services, or of defect
in the work of CONSULTANT or the CONTRACTOR.
4.4 The PARTNERS shall examine information submitted by CONSULTANT and provide comments in
writing and provide decisions in a timely manner.
4.5 The PARTNERS shall furnish required information and approvals in a timely manner.
4.6 The PARTNERS shall cause all agreements with the CONTRACTOR to be consistent with
CONSULTANT's Agreement.
Page 7 of 9
Brushy Creek East Regional WWTP
Rehab Project
Additional Detailed Design Amendment
List of Meetings and Deliverables
Task Meetings Deliverables
1.1 PMP and Kickoff • Project kickoff meeting/site visit • Baseline schedule
• Kickoff meeting materials and
notes
bD
• 1.2 Monthlyra • N/A • Progress Report in pdf format
Monitoring
CD
1.3 Subconsultant
• Internal Task Kickoff meetings,
• Internal design coordination • N/A
•o Management s
meetin
a meetings
r; 1.4 Coordination • 2 coordination meetings • Meeting materials and notes
with Other Projects
1.5 Progress • Up to 4 progress/operations • Meeting materials and notes
Meetings meetings
• Meeting materials and notes
• 30% Discipline Design Basis
2.1 30% Design • 30% Design Review Workshop Memoranda including Drawings
(electronic)
oco • Process Modelling TM
a • Meeting materials and notes
• 60%-90% Design Review• 2.2 60%-90% Design Workshop • 60%-90% Design Drawings and
Specifications (electronic)
• 100%Signed and Sealed Design
2.3 100% Design • N/A Drawings and Specifications
(electronic)
c c
ai
a a 3.1 Equipment • N/A • N/A
5 a Preselection
CT
W
M
- 4.1 Topographic • N/A • N/A
' w Survey
u
v
4.2 Geotechnical • N/A • N/A
—
m To
o > 5.1 State and Local • N/A • N/A
. n Approvals
Lt c
ro Q
• Equipment Preselection
U
a • 30%OPCC
p 6.1 OPCC • N/A • 60%-90%OPCC
`D • 100%OPCC
Page 8 of 9
Brushy Creek East Regional WWTP
Rehab Project
Additional Detailed Design Amendment
H
Meetings Deliverables
v • Internal Quality Review meetings
7.1 Quality Review for 30%, 60% 90% Design • Quality Assurance Audit Log
cf
c �a
c
N • N/A • N/A
• k"
• a
Page 9 of 9
ADDENDUM TO EXHIBIT C
Work Schedule
Attached Behind This Page
i
ID Task (Task Name Du 1 Dec'25 j Jan'26 1Feb'26 Mar'26 i
1 AF
0 Mode 23 30 7 14121128 4 11 1 18 25 1 1 8 115122 1 1 8 115122 29
i 1 Detailed Design Phase 48 I
i
2 II4 Design 19 I
3 30% Design 69
4 Mechanical 40
5 Structural 40
6 10 EI&C 20
7 0: Internal Internal QC 9 i
- 8 2 Incorporate Comments 1C
9 le Workshop 1 i
10 Client review 9 t
.--
11 ! 60%-90% Design 62 1
12 oa Mechanical 4C
13 as114 Structural 4(
j 14 E El&C 3(
15 rfi n Internal QC 9
During 100%
16 w
4 Incorporate Comments 9 workshop
17 i' Workshop (with 100% 15
design)
18 ar
4 Client review 9
19 , 100%Design 64 1
20 ri or
4 Mechanical 31
21 El Structural 31
22 f El&C 31
23 ! Internal QC 9 IE
24 % Incorporate Comments 11
25 % Client Review 9
26 "4 Final Sealing& Compiling with 1! iNIIIMIONI
Complete Set
Task WINNI 4
Project: BCE 40 MGD Expansion Split „,,,,
Date:Wed 5/21/25 Milestone • -ogress
Summary
ADDENDUM TO EXHIBIT D
Fee Schedule
Attached Behind This Page
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City of Round Rock
Brushy Creek East Rehabilitation Additional Detailed Design
Principal 1 Sr.Eloc Eng.I Proj Mgr Proj Engr ER Technician Clerical Total Labor Sub consultant($) Total Fee Percent of
(hrs) I (his) Hirai i (hrs) (hrs) (lira) (hrs) Hours Fee(S) FNI (S) Total Fee
2 Detailed Design-Additional Items 0 14 6 60 70 64 0 258 $ 44,060 $ 184,734 $ 224,714
2.1 Project Management(No Addition.'Soaps) 0 8 $ 9.0%
22 Design Phase 0 0 6 90 72 64 0 240 8 34,230 $ 184,734 $ 223,Os4 67,6%
2.2.1 30%Design 0 4 0 12 18 14 0 48 $ 8,020 $ 46,184 $ 54,204
f Taskalgmt 0 $ -
2 Process Machan/cal 0 $ -
RAS-WAS PS 2 pump analysis i sheets 0 $ .
UV•1 i 1 Canopy meth coorideaflon i structural _ _ 4 8 12 $ 1.900 $ 27.674
Scum PS 1 i 2 Level Control 0 $ -
3 Electrical&HVAC•Dewafering i Thickening 0 $ - $ 18.510
4 I&C 4 _ 4 $ 1,300
5 General Shwd/Std DeMIh 2 6 . 14 $ 2,090
6 Non-equipment development 2 6 $ 1.190
7 DBMDevektpmant 10 S 1.540
2.2.2 60%•90%Design 0 4 4 62 38 28 I 0 136 8 22,470 $ 92,387
I Task Mgmt ) 4 , 4 $ 800
2 Process Mechanical 0 $
RAS-WAS PS 2 punrp analysis&sheets 16 20 16 52 $ 8,000
UV-1 i l Canopy match coondnarion 6 structural 4 8 12 5 1.900 $ 55,348
-- Scum PS 1 6 2 Level Control -_ -0 I-1$ 1,400
3 EMcuical 4 HVAC•Dewatenng&Thickening 11111111111.MILl
0 $ - $ 37,019
4 liC J 18 i$ 3.400
5 General Shoots/Sid Details - 10 8 2 18 1$ 2.890
6 Non-oqulpment spec development 10 6 2 18 I$ 2.890
7 DBM Development - - 2 6 8 $ 1,190
2.2.4 100%Design _ 0 0 2 16 /6 21 0 56 $ 8.740 $ 48,184
1 Task Mgmt - 2 2 $ 400_.-
1 Process Mechanical 0 $
RAS-WAS PS 1 pump analysis i sheets 4 8 _-- _ - 20 $ i ti2,1
UV-1&1 Canopy mach coondnatlon i structural 4 12 $ 1.900 $ 27,674
Scum PS 16 1 Level Control 4 4 $ 700
3 Electrical 6 HVAC Dewatering 6 Thickening _ 0 5 - $ 18.510
4 MC 2 2 1$• 350
5 General Sheets/S1d(NNW 2 4 6 12 i$ 1.810
6 Non-equipment spec development 4 4 $ 56i1
7 DBM Development 0 '$ -
2.3 Equipment Pres&Nction(No additional Scope) 0 0 0 0 0 0 0 0 1$ • $ • 5,0%
2.4 Field Survey(No Addition/Scope) 0 0 0 0 0 0 0 0 $ • $ • $ • 0.0%
2.5 State and Local Approvals(No Additional Scope) 0 0 0 0 0 0 0 0 8 • $ • $ • 0.0%
2.6 OPCC and Conat Schedule 0 $ • $ • $ • 6.0%
2.7 Quality RevNw 6 0 6 18 S 4,830 $ • $ 4.630 2.1%
2.6 Bidding Assistance(No Additional Scopa) 0 0 0 0 0 0 0 0 $ • $ 0.0%
2.9 Supphmnenml Services(No Addition/Scope) 0 0 0 0 0 0 0 0 $ • $ • $ - 0,0%
TOTAL LABOR 1 1
Total Labor Hours 6 14 6 1 90 78 i 64 1 0 258
1 1 i
Labor Rates per Hour 4340 4325 5200 I $175 $140 1 5150 1 S110
I
Total Amounts by Labor Category $ 2,048 $ 4,550 $ 1,200 I 5 15,750 1E5 10,920 I $ 9,600 $ - $ 44,060 5 184.734 S 228,794
I Labor Category Percent of Total Labor 4.6% 10.3% 2.7% 35.7% ! 24.8% I 21.8% 1 0.0% 19% 81%
TOTAL EXPENSES Mee breakdown below(
Total Sobconsuitanta 5 104,734
Total Relmbursables $
TOTAL $ 225,794