Contract - Plummer Associates, Inc. - 5/28/2026 STATE OF TEXAS §
COUNTY OF WILLIAMSON §
SUPPLEMENTAL CONTRACT NO. 2
TO CONTRACT FOR ENGINEERING SERVICES
FIRM: PLUMMER ASSOCIATES,INC. ("Engineer")
ADDRESS: 8911 N. Capital of TX Highway,Building 1, Suite 1350,Austin,TX 78759
PROJECT: BCRWWS East WWTP Expansion to 40 MGD
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 Associates, Inc.,
hereinafter called the"Engineer."
WHEREAS, the City and Engineer executed a Contract for Engineering Services, hereinafter
called the "Contract," on the 13th day of September, 2024 for the BCRWWS East WWTP
Expansion to 40 MGD Project in the amount of$35,100.00; and
WHEREAS,the City and Engineer executed Supplemental Contract No. 1 on January 2,2026 to
amend the scope of services and to increase the compensation by $61,480.00 to a total of
$96,580.00; 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 $124,980.00 to a total of$221,560.00;
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
0199.202433 84275
I
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III.
Article 4. Compensation and Exhibit D. Fee Schedule shall be amended by increasing by
$124,980.00 the maximum amount payable under the Contract for a total of$221,560.00,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.06/16
0199.202433 84275
2
PLUMMER ASSOCIATES,INC.
By:
Printed Name: Mary Portillo
Title: Principal in Charge
Date Signed: 5/4/2026
Supplemental Contract Rev.06/16
0199.202433 84275
3
CITY OF OUNP ROCK APPROVED AS TO FORM:
By: o,
Craig Ntorian,f
yor Stephanie L. Sandre,City Attorney
Date
Supplemental Contract Rev.06/16
0199.202433 84275
4
A`k PLUMMER
ADDENDUM TO EXHIBIT A
City Services
The City of Round Rock will furnish to the Engineer the following items/information:
• Attend kickoff meeting (1 for SSO Manual) and progress meetings (1/month).
• 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 criteria and full information as to City's requirements for the project,
including objectives and constraints and furnish copies of standards which City will
require to be included in the project.
• Assist Engineer by placing available information pertinent to the Project, including
previous information and other data relative to the Project at the Engineer's
disposal.
• Provide digital design files or records available which would assist in the completion
of the project development.
• Timely review, up to 10 business days, and comment on the draft deliverables.
Exhibit A
1of1
ADDENDUM TO EXHIBIT B
Engineering Services
Attached Behind This Page
Brushy Creek East Regional WWTP
TWDB Funding
Additional Support
Amendment 2 0982-025-01
EXHIBIT B
TWDB Funding Support Services
Support Services to be provided for the Additional TWDB Funding Support Amendment of the 40 MGD
Expansion project:
Background
The Brushy Creek East (BCE) Regional Wastewater Treatment Plant (Plant) is owned by the Brushy Creek
Regional Wastewater System (BCRWWS),who are the Cities of Round Rock,Cedar Park, Leander and Austin
(Partners).The engineering team, led by Prime consultant Plummer Associates,and sub consultants Freese
& Nichols and Lochner (Engineer) designed the most recent 10 MGD expansion, increasing the Plant's
capacity from 30 MGD to 40 MGD.
The City has been invited to apply for$60 million from the Clean Water State Revolving Fund (CWSRF) for
the BCE 40 MGD Expansion project. The City intends to pursue this funding and has expressed interest in
retaining Plummer's support for the funding application process till loan closing. Additionally,the City has
requested Plummer's services in updating their Sanitary Sewer Overflow (SSO) Manual.
SCOPE—Additional Detailed Design Services
The purpose of this scope of services is to provide additional services for:
1. FY 2027 PIF Submission
2. SSO Manual Updates
3. Additional Support for TWDB Loan Closing
Task 1:FY 2027 PIF Submission
To apply for additional funding from the TWDB for the BCE 40MGD Expansion project, Plummer will prepare
the FY 2027 TWDB loan application Project Information Form (PIF) for submission. This includes outlining
the Plant's current and future capacity, schedule and budget of the project, predicted environmental
impacts, and technical features.
Tasks:
The scope of work for Task 1 is further defined in the following sub-tasks, including:
A. PIF Preparation
B. Quality Management
A. PIF Preparation
Plummer will prepare the PIF for the City's online submission.
Deliverables:Final PIF prepared for online submission to TWDB
B. Quality Management
Plummer will conduct QA/QC reviews for PIF application.
Page 1 of 6
Brushy Creek East Regional WWTP
TWDB Funding
Additional Support
Amendment 2 0982-025-01
Schedule:
• Refer to Exhibit C for Timeline of Work.
Compensation:
• Refer to Exhibit D for Expected Hours and Fee.
Task 2:SSO Manual Updates
The City requested support services for updating their Sanitary Sewer Overflow (SSO) Manual dated 2022
for clarity of language, additional documentation, and compliance with current TCEQ standards. Plummer
will review current regulatory standards to verify the Manual is in compliance and will provide necessary
updates to the current Standard Operating Procedure (SOP) for operator use.
Tasks:
The scope of work for Task 2 is further defined in the following sub-tasks, including:
A. Project Management
B. Compliance Review
C. Quality Management
D. Updated Manual and SOP
A. Project Management
PM effort for this task includes communication and coordination, scope, schedule and budget
management, monthly invoicing, status reports and other activities associated with project
management.This task is expected to take up to 2 months to complete.
B. Compliance Review
Plummer will perform a compliance review of the City's current SSO Manual against TCEQ
requirements.
C. Quality Management
Plummer will conduct CW/QC reviews for materials to be submitted to the City.
D. Update Manual and SOP
Engineering effort for this task includes a SSO response procedure for both field and administrative
staff, investigation and documentation workflows, public notification procedures, and
recordkeeping practices, and other sections necessary to update the SSO Manual. Plummer will
update the City's Standard Operating Procedure (SOP)to accompany the updated Manual. During
the review meeting, Plummer will provide one training on the steps to report an SSO to TCEQ and
the use of the SOP.
Meetings: One virtual(1) Kick-off Meeting with the City, up to one (1) hour and one virtual(1)
Review Meeting with the City, up to two(2)hours.
Deliverables:Meeting notes, Draft SSO Manual and SOP, Final SSO Manual and SOP(2 hardcopy
and 1 softcopy).
Page 2 of 6
Brushy Creek East Regional WWTP
TWDB Funding
Additional Support
Amendment 2 0982-025-01
Schedule:
• Refer to Exhibit C for Timeline of Work.
Compensation:
0 Refer to Exhibit D for Expected Hours and Fee.
List of Assumptions:
1. Field investigations, hydraulic modeling,or site visits are not required.
2. Legal review is not included.
3. Work is limited to the wastewater collection system.
4. Revisions beyond stated review may require additional services.
5. GIS-based mapping is not included.
6. Integration with funding compliance requirements is not included.
7. On-call regulatory support is not included.
8. Submission to TCEQ as part of the SSO Initiative is voluntary and not required.
Page 3 of 6
Brushy Creek East Regional WWTP
TWDB Funding
Additional Support
Amendment 2 0982-025-01
Task 3:Additional Support for TWDB Loan Closing
The previous supplemental provides the City with TWDB funding support until a previously estimated TWDB
Loan Closing period of August 2026, with the assumption that the TWDB Loan Commitment Board meeting
will take place in April 2026.The additional support task will cover the continued funding support due to the
delays to the Board meeting date and additional time that TWDB will need to review the Engineering
Feasibility Report (EFR), Environmental Information Document (EID) and Plans and Specifications (P&S).
Plummer will provide ongoing TWDB funding support to the City through to the concurrence of Notice to
Proceed (NTP) by the TWDB. This includes coordinating with the City and TWDB to meet regulatory
standards and milestone dates, reviewing and responding to TWDB RFIs, and preparing key deliverables.
Tasks:
The scope of work for Task 3 is further defined in the following tasks, including:
A. Project Management
B. Quality Management
C. TWDB Coordination
D. City Coordination
E. Deliverable and Form Support
A. Project Management
Includes PM effort for this under the budget for communication and coordination, scope,schedule
and budget management, monthly invoicing, status reports and other activities associated with
project management.
B. Quality Management
Plummer will conduct CIA/QC reviews for materials to be submitted to the City and TWDB.
C. TWDB Coordination
Plummer will coordinate directly with TWDB staff, prepare for and attend TWDB meetings, and
track TWDB requirements, milestones, and schedules. Plummer will prepare and track responses
to TWDB RFIs.
Meetings:Up to Five(5)virtual Meeting with TWDB, up to an hour each.
Deliverables:Meeting notes, Responses to RFIs received from TWDB.
D. City Coordination
Plummer will conduct coordination meetings with City staff and provide guidance on TWDB
process, risks, and schedule.
Meetings:One(1) virtual Meeting per Month, up to an hour.
Deliverables:Meeting notes.
E. Deliverable and Form Support
Plummer will provide necessary updates to the EFR, P&S, TWDB review packages, and related
forms. The ENGINEER will assist in completing TWDB checklists required for submission as part of
the funding application and process.
Deliverables: Updates to EFR and P&S, submission of TWDB checklists.
Page 4 of 6
Brushy Creek East Regional WWTP
TWDB Funding
Additional Support
Amendment 2 0982-025-01
Schedule:
• Refer to Exhibit C for Timeline of Work.
Compensation:
• Refer to Exhibit D for Expected Hours and Fee.
List of Assumptions:
1. Project duration is based on the conservative schedule estimates and per TWDB's estimated review
period and scheduled Board meeting for this project.
2. Anticipated RFIs:
a. Up to 20 RFls.
3. Meeting frequency with the City:
a. 1 per month.
4. Scope does not include:
a. Detailed engineering design.
b. Construction phase.
5. Additional services may be required if:
a. TWDB requires significant re-submittals or additional studies.
b. Project scopes or funding program changes.
c. Environmental clearance becomes complex.
d. Additional funding applications are pursued.
Page 5 of 6
Brushy Creek East Regional WWTP
TWDB Funding
Additional Support
Amendment 2 0982-025-01
List of Meetings and Deliverables
Sub-Task Meetings Deliverables
1.1 PIF Preparation • N/A • Final PIF submission
LL C
M
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o E 1.2 Quality • Internal QC discussion • Reviewed PIF draft
Management
2.1 Project • Internal task kickoff meeting • Monthly reports with invoicing
N Management
v 2.2 Compliance • Internal discussions • N/A
0
CL Review
D
70 2.3 Quality • Internal QC discussions • Reviewed SSO Manual draft
� Management • Reviewed SOP,templates
m
2 2.4 Updated SSO • 1 kick-off meeting with the City • Updated SSO Manual
Ln
Manual and SOP • 1 review meeting with the City • Updated SOP
Ln • Reporting templates, if any
m
3.1 Project • N/A • Monthly reports with invoicing,
o Management invoices, schedule
3.2 Quality • Internal QC discussions • N/A
C Management
o 0 3.3 TWDB • Up to 5 meetings with TWDB • Meeting notes
a
CL v Coordination • Responses to RFIs received from
Ln m TWDB
0
c J 3.4 City Coordination • 1 meeting per month during the • Meeting notes
0
term of this agreement
Q3.5 Deliverable and • N/A • Updates to EFR and P&S
Form Support • TWDB checklists
Page 6 of 6
ADDENDUM TO EXHIBIT C
Work Schedule
Attached Behind This Page
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ADDENDUM TO EXHIBIT D
Fee Schedule
Attached Behind This Page
Exhibit D-Fee Schedule
City of Round Rock
Brushy Creek East Expansion to 40 MGD-TWDB Support_Amendment 2
Principal Proj Mgr Proj Engr clerical Total Labor Total Fee Percent of
(hrs) (hrs) (hrs) (hrs) Hours Fee(f) (S) Total Fee
1 FY 2027 PIF Submission 0 10 10 0 20 $ 4,900 $ 4,900 3.9°
2 SSO Manual Updates 12 50 80 8 150 f 36,420 f 36,420 29.2%
Project Management 10 8
Quality Management 12
Compliance Review 10 15
Update Manual and SOP 30 65
3 Additional Support for TWDB Loan Closing 20 150 150 20 340 $ 83,200 $ 83,200 66.8%
Project Management 40 20
Quality Management 20
TWDB Coordination 40 40
City Coordination 30 30
Deliverable and Form Support 40 80
TOTAL LABOR
Total Labor Hours 32 210 240 28 510 124,520
Labor Rates per Hour $360 $270 $220 $125
Total Amounts by Labor Category f 11,520 f 56,700 f 52,800 $ 3,500 $ 124,520 f 124,520
Labor Category Percent of Total Labor 9.3% 45.5% 42.4% 28% 100%
TOTAL EXPENSES(see breakdown below)
Total Subconsultants f -
Total Reimbursables $ 460
TOTAL $ 124,980
Notes:Billing rates may be adjusted by up to 4 percent annually(at the beginning of each calendar year)during the tens of this agreement
A multiplier of 1.15 will be applied to all direct expenses.
A technology charge will be billed at$5 per labor hour.