Contract - Carollo Engineers, Inc. - 5/22/2025 STATE OF TEXAS §
COUNTY OF WILLIAMSON §
SUPPLEMENTAL CONTRACT NO. 1
TO CONTRACT FOR ENGINEERING SERVICES
FIRM: CAROLLO ENGINEERS,INC. ("Engineer")
ADDRESS: 10900 Stonelake Boulevard,Building 2, Suite 126,Austin,TX 78759
PROJECT: Raw Water Treatment Improvements
This Supplemental Contract No. 1 to Contract for Engineering Services is made by and between
the City of Round Rock, Texas, hereinafter called the "City" and Carollo Engineers, Inc.,
hereinafter called the"Engineer."
WHEREAS, the City and Engineer executed a Contract for Engineering Services, hereinafter
called the"Contract,"on the 8th day of March,2024 for the Raw Water Treatment Improvements
Project in the amount of$85,432.00; 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$72,400.00 to a total of$157,832.00;
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.
III.
Article 4, Compensation and Exhibit D, Fee Schedule shall be amended by increasing by
$72,400.00 the maximum amount payable under the Contract for a total of$157,832.00,as shown
by the attached Addendum to Exhibit D.
IN WITNESS WHEREOF,the City and the Engineer have executed this Supplemental Contract
in duplicate.
Supplemental Contract Rev.06/16
0199.202407;4902-9200-4409 84275
i
CAROLLO ENGINEERS,INC.
By•
Ll/L � / zC-
Date
Supplemental Contract Rev.06/16
0199.202407;4902-9200-4409 84275
2
CITY OF ROUND ROCK APPROVED AS TO FORM:
By:
Craig Mor n, or Stephanie L. Sandre,City Attorney
2 Zav Z
Date
Supplemental Contract Rev.06/16
0199.202407;4902-9200-4409 84275
3
Addendum to Exhibit A
City Services
The City of Round Rock will furnish to the Engineer the following items/information:
• 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.
• City will participate in meetings and facilitate the sharing of information, provide guidance, and
respond to requests for information.
• City will provide relevant records,water quality data,and as-built drawings to the Consultant.
• City will provide timely review of deliverables in accordance with the project schedule. City will
provide review comments on deliverables in writing within two weeks of delivery.
• City will construct and operate the pilot demonstration system.
Addendum to Exhibit B
Engineering Services
CITY OF ROUND ROCK
ZEBRA MUSSELS EVALUATION AND WATER/WASTEWATER PFAS STUDY
ENGINEERING SERVICES
AMENDMENT NO. 1
MARCH 2025
SCOPE OF WORK
PROJECT DESCRIPTION
The City of Round Rock(Owner)is taking proactive steps to protect their raw water source from
invasive zebra mussels that have been detected in central Texas watersheds, but not yet at the
Owner's WTP intakes. Task 200 of the original Scope of Work produced a Technical
Memorandum(TM)for a Zebra Mussel Control Strategy at the Owner's Lake Georgetown Raw
Water Intake. The TM includes the background, conceptual designs, and comparison of three
(3)copper-based zebra mussel control alternatives—EarthTec QZ, copper ion generation, and
non-proprietary copper sulfate—with the existing sodium permanganate system. The
comparison of the three alternatives were completed based on an evaluation matrix that
included the following criteria:water quality impacts, effectiveness for zebra mussel control,
TCEQ and U.S. Army Corps permitting requirements, compatibility with the existing system,
operability, maintainability, and costs. Resulting from this evaluation, the Owner selected
EarthTec QZ as their zebra mussel control strategy and a pilot demonstration is planned to
validate the full-scale applicability of the alternative. Amendment No. 1 involves services
requested by the Owner for Carollo Engineers(Engineer)to support their EarthTec QZ pilot
demonstration and the permitting requirements associated with this pilot.
BASIC SERVICES TASKS
Engineer will provide permitting assistance for the Owner to proceed with the Pilot
Demonstration and provide technical support and analysis of the Pilot Demonstration results
and findings during and after the demonstration period.
The following tasks are included in this scope of services:
• Task 100— Project Management
• Task 200—Permitting Assistance
• Task 300—Pilot Support
ASSUMPTIONS
This scope and fee are based on the following assumptions:
• Engineer will provide technical assistance to the Owner on the pilot test approach, develop
the pilot test protocol, and pilot test report.
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• Owner will be responsible for procuring any required pilot test equipment and setting up the
pilot system in coordination with the vendor.
• Owner will be responsible for operating the pilot system. Engineer will provide a protocols for
pump drawdown tests, sampling, and field data collection with log sheets. Engineer will
meet with the Owner to advise on pilot start-up and operation, and meet during the pilot to
provide QA on pilot operations.
• An amendment will be needed for the Engineer and its Subconsultant to prepare a 404
permit, if required by the USACE.
TASK 100 - PROJECT MANAGEMENT
Engineer will provide project management services to facilitate efficient project completion.
Engineer's efforts will include the following activities, and will be based on the assumptions
stated,where applicable.
Task 101 —Team Project Management
Engineer will provide project management services specific to the internal team for the purposes
of managing the team to complete the tasks described in this scope of work through the
duration of the contract.
Task 102—Prepare and Submit Project Status Resorts
Engineer will prepare and submit to the Owner, in electronic PDF format, a monthly project
status report, summarizing the work completed by Engineer during the previous month,
anticipated work for the following month, current budget and schedule status, and any project
issues requiring discussion or resolution. This task assumes a submission of a maximum of ten
(10) status reports during the duration of the project.
Task 103—Meetinas
Engineer will attend the following meetings with the Owner at different stages of the project.
Following each meeting, Engineer will prepare and distribute minutes documenting key
discussion and action items from the meeting.
• Kick-off Meeting: Engineer will attend a kick-off meeting at the onset of the project to
confirm the scope of work, review contractual responsibilities, confirm goals, and clarify
questions. Scope assumes one(1) in-person meeting with Owner,with attendance by
maximum of two(2) Engineer representatives.
• Pilot Start-Up Meeting: Engineer will meet with City operators to discuss pilot start-up
and operations. Scope assumes one (1) in-person meeting with attendance by
maximum of two(2) Engineer representatives.
• Mid-Pilot Check-In: Engineer will attend a check-in meeting in the middle of the Pilot
Demonstration to discuss project progress, and potential issues and resolution. Scope
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assumes one(1) in-person meeting with Owner, with attendance by maximum of two(2)
Engineer representatives.
• Post-Pilot Review Meeting: Engineer will attend a review meeting upon completion of
the Pilot Demonstration to discuss findings and Engineer's approach for the Pilot Test
Report. Scope assumes one(1) in-person meeting with Owner,with attendance by
maximum of two(2) Engineer representatives. Engineer will start drafting the Pilot Test
Report following the meeting.
Task 100 Deliverables:
• Monthly Status Reports and Invoices
• Meeting Minutes
TASK 200 - PERMITTING ASSISTANCE
Engineer will assist the Owner with coordination with the Texas Commission for Environmental
Quality(TCEQ), U.S. Army Corps of Engineers(USACE), and vendors to develop the Pilot Test
Protocol and obtain regulatory approval for a 1-year EarthTec Pilot Demonstration at the
Owner's Lake Georgetown Raw Water Intake. Additionally, the Engineer will coordinate with
USACE to obtain approval for use of a copper ion generation system for zebra mussel control at
the Lake Georgetown Raw Water Intake. Detailed activities are described in the following
subtasks based on the assumptions stated, where applicable.
Task 201 —Coordination with TCEQ
Engineer will perform the following activities to assist the Owner in obtaining TCEQ approval for
a 1-year EarthTec Pilot Demonstration.
• Engineer will coordinate and attend a preliminary virtual meeting with TCEQ and the
Owner to discuss the requirements for approval of the EarthTec Pilot Demonstration.
Scope assumes two (2) Engineer representatives preparing for and attending one (1)
meeting with TCEQ.
• Engineer will develop a draft and final Pilot Test Protocol. The protocol will include
technical details including dosing procedures, equipment installation locations,
operations plan, sampling plan, and anticipated impacts to the Owner's raw water
quality. Engineer will submit the draft protocol to the Owner for review. The final Pilot
Test Protocol will be submitted to TCEQ.
• Engineer will coordinate and attend a virtual follow-up meeting with TCEQ after the final
Pilot Test Protocol is submitted. The purpose of this meeting is to follow up with TCEQ
on the approval process and resolve potential questions TCEQ may have regarding the
Pilot Test Protocol. Scope assumes two(2) Engineer representatives preparing for and
attending one(1)follow-up meeting with TCEQ.
• The scope also assumes eight(8) hours in total for Engineer representatives to respond
to any comments and questions that TCEQ has on the Pilot Test Protocol, and perform
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work and communication required by TCEQ to obtain approval of the Pilot
Demonstration.
Task 201 Deliverables:
• Draft and final Pilot Test Protocol
• Meeting minutes
Task 202—Coordination with USACE
Engineer and its Subconsultant will perform the following activities to assist the Owner in
obtaining USACE approval for a 1-year Pilot Demonstration for EarthTec and copper ion
generation.
• Engineer will coordinate and attend a virtual meeting with USACE and the Owner to
discuss the requirements for approval of dosing EarthTec and copper ion from copper
ion generation (should the Owner elect to implement this technology in the future)at the
Lake Georgetown intake, and for maintaining existing approval of dosing sodium
permanganate. Scope assumes three(3) hours each for two (2) Engineer
representatives preparing for and attending one(1) meeting with USACE.
• Engineer will obtain and provide the information required by USACE for the pilot. The
scope assumes the following information will be provided: chemical data sheets, details
on chemical storage and containment, dose, and equipment for copper ion generation if
used.
Task 202 Deliverables:
• Submittal to USACE
• Meeting minutes
203—Coordination with Vendor
Engineer will coordinate with the EarthTec and copper ion generator vendors for information
requested by TCEQ or USACE for regulatory approval, and for input on Pilot Test Protocol
development,when applicable.
Task 203 Deliverables:
• None
TASK 300 - PILOT SUPPORT
Task 301 —Site Visits
Engineer will conduct three(3) half-day site visits by one (1) Engineer representative to the Pilot
Demonstration location throughout the 1-year EarthTec QZ Pilot Demonstration. The purpose of
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the site visits is to routinely check the status of Pilot Demonstration and provide technical
support to the Owner about potential issues.
Task 301 Deliverables:
• Site Visit Notes
Task 30 —Draft and Final Pilot Test Report
Engineer will develop a draft and final Pilot Test Report after the Post-Pilot Review Meeting with
the Owner. The report will include consistency of EarthTec dosing, storage and feed system
operability and maintainability, and recommendations and lessons learned for full-scale
implementation. The draft Pilot Test Report will be submitted to the Owner for review and
comments. The Pilot Test Report will be finalized upon receipt of Owner's comments.
Task 302 Deliverables:
Draft and Final Pilot Test Report
Tack 303—Additional Technical Support(As-Needed)
Engineer will provide additional technical support during the Pilot Demonstration as requested
by the Owner. Scope assumes a maximum of twelve(12) hours of work can be performed, and
work to be performed must be approved by the Owner.
Task 303 Deliverables:
• None
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Addendum to Exhibit C
Work Schedule
Schedule
Immediately upon receipt of Notice to Proceed (NTP), Engineer is prepared to proceed with the
following schedule.
• Task 103 Meetings:
o Kick-off Meeting: within 2 weeks of NTP
o Pilot Start-Up Meeting: within 1 week prior of Pilot Demonstration startup
o Mid-Pilot Check-in Meeting: 6 months after Pilot Demonstration starts
o Post-Pilot Review Meeting: within 2 weeks of Pilot Demonstration completion
• Task 200 Permitting Assistance:
o 1 month after NTP
• Task 301 Site Visits:
o Throughout the 1-year Pilot Demonstration period
• Task 303 Draft and Final Testing Report
o 2 months after Pilot Demonstration completion
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Addendum to Exhibit D
Fee Schedule
Attached Behind This Page
Exhibit D-Fee Schedule
City of Round Rock-Zebra Mussels Evaluation and W/WW PFAS Study-AMENDMENT 1
Labor Hours and Costs
Principal in Technical
Charge Advisor/Interim Project Manager Staff Engineer Technical Editor Other Direct
Project Role PM Costs(Travel Subconsultant Task Total
Principal Senior Senior Document I Meals)
Labor Category Professional Professional Professional Staff Engineer Processing
aro ne usse ,
Project Team Member Hani Michel,PE PhD,PE Brenna Bates,PE Jerry Yan,PhD Katy Butler Labor Total
Task k Task Description Hours Dollars
$318 $280 $280 $140 $120
100 PROJECT MANAGEMENT _
Team Project Management_ 2 8 18 0 0 28 $7,916 $7,916
Prepare and Submit Project Status Reports 0 2 4 0 4 10 $2,160 $2,160
Meetings 4 8 8 12 0 32 $7,432 $400 $7,832
200 PerrnkUng Assistance ---
Coordination with TCEO 2 18 0 42 4 66 $12,036 $12,038
Coordination with USACE 2 4 0 16 0 _ 22 $3,996 $13,794 $17,790
Coordination with Vendor 0 2 4 12 0 18 $3,360 $3,360
300 Pilot Support
Site Visits 0 2 6 12 0 20 $3,920 $150 $4,070
Draft and Final Pilot Test Report 2 8 16 40 10 76 $14,156 $14,156
Additional Technical Support As-Needed 0 4 4 6 0 14 $3,080 $3,080
Totals 12 56 so 140 18 268 $06,068 $660 $13,784 $72,400