Agreement - Wilson Engineers, LLC

Project Name: Water Reclamation Facility Improvements Phase 3 – Amendment No. 1
Page 1
Project No.: WW2206.201
Rev. 5/13/2024
AMENDMENT NO. 1 TO 
DESIGN SERVICES AGREEMENT
Water Reclamation Facility Improvements Phase 3
Project No. WW2401.201
Council Date: September 12, 2024
THIS AMENDMENT NO. 1 (“Amendment No. 1”) to the professional services agreement dated 
March 19, 2024, (the “Agreement”) is made by and between the City of Chandler, an Arizona 
municipal corporation, (“City”) and Wilson Engineers, LLC., an Arizona limited liability company, 
(“Consultant”), on this ______ day of ___________________, 2024, (“Effective Date” by Clerk). (City and 
Consultant may individually be referred to as “Party” and collectively referred to as “Parties”).
RECITALS
A.
The Parties entered into the Agreement for Design Services (“Services”) for the Water 
Reclamation Facility Improvements Phase 3 project.
B.
The Parties have determined that it is necessary and desirable for the Consultant to 
perform services for the City under the terms and conditions set forth in this Amendment No. 1
and the Agreement.
AGREEMENT
NOW, THEREFORE, in consideration of the premises and mutual promises contained in the 
Agreement and this Amendment No. 1, the Parties agree to amend and modify the Agreement 
as follows.
SECTION I – CONSULTANT’S SERVICES
The Consultant’s Services are modified as described in the Exhibit "A" attached to and made 
part of this amendment by reference.
Project No.: WW2401.201
Rev. 5/13/24

Project Name: Water Reclamation Facility Improvements Phase 3 – Amendment No. 1 
Page 2 
Project No.: WW2206.201 
Rev. 5/13/2024 
 
SECTION II – PERIOD OF SERVICE 
 
The Period of Service remains the same as described in the Agreement. 
 
SECTION III – PAYMENT OF COMPENSATION AND FEES 
 
The Fees are increased by $1,027,795.60 and will be payable in accordance with Exhibit "B" 
attached to and made part of this amendment by reference, for a revised total not to exceed 
$3,601,875.60. 
 
SECTION IV – CONFLICT AMONG DOCUMENTS 
 
The Agreement, this amendment, and any previous amendments constitute the complete 
agreement between the Parties concerning the subject matter of the Agreement and replace 
any prior oral or written communications between the Parties.  If a conflict or ambiguity arises 
between the Agreement and this amendment, the instrument in the following order prevails 
and controls: (1) this amendment; (2) any previous Amendments from most recent to oldest; 
and (3) the Agreement. 
 
 
 
 
 
SIGNATURE PAGE TO FOLLOW 
 
 
 
 
 
 
Project No.: WW2401.201
Rev. 5/13/24

Project Name: Water Reclamation Facility Improvements Phase 3 – Amendment No. 1 
Page 4 
Project No.: WW2206.201 
Rev. 5/13/2024 
 
Amendment No. 1 (cont.) 
Project No. WW2401.201 
 
 
These changes result in the following adjustments of Agreement amount and/or time: 
 
Amendment authorized by Owner name: Josef Kennis 
 
 
Date: 8/8/2024 
Consultant email:  srengaraj@wilson-engineers.com 
Original Agreement amount: 
$2,574,080 
Previous Amendment(s) total: 
$0 
Last Agreement amount approved by Council: 
$2,574,080 
This Amendment: 
$1,027,795.60 
This Amendment + previous Amendment(s) not approved by 
Council total: 
$1,027,795.60 
Revised Agreement total: 
$3,601,875,60 
Council Approval Required (yes indicates approval required) 
Yes 
No 
Amendment(s) total over $100,000: 
܈ 
܆ 
Amendment(s) total causes Agreement to exceed $100,000:  
܈ 
܆ 
Agreement Time 
Agreement time prior to this Amendment (including previous 
amendments): 
545 
Calendar Days 
Net change resulting from this Amendment: 
0 
Calendar Days 
Revised Agreement time (including this Amendment): 
545 
Calendar Days 
Council Approval (if applicable) 
Council Approval Date: September 12, 2024 
 
cc:  Project Manager, Consultant, Owner, File 
 
 
 
Project No.: WW2401.201
Rev. 5/13/24

Project Name: Water Reclamation Facility Improvements Phase 3 – Amendment No. 1 
Page A-1 
Project No.: WW2206.201 
Rev 3/12/2024 
 
EXHIBIT A 
SCOPE OF WORK 
 
 
 
 
 
Project No.: WW2401.201
Rev. 5/13/24

WATER RECLAMATION FACILITIES 
PHASE 3 IMPROVEMENTS PROJECT  
SCOPE OF SERVICES 
CITY PROJECT NUMBER: WW 2401-201 
August 09, 2024 
 
 
The City of Chandler (CITY) selected Wilson Engineers (ENGINEER) to complete the Water 
Reclamation Facilities Improvements design at both the Airport and the Ocotillo WRFs to replace and 
rehabilitate existing processes. As part of the first phase of this project effort, the ENGINEER has 
completed the assessment of treatment facilities and identified the rehabilitation and replacement work 
needed for operational improvements and rehabilitation of existing infrastructure at both facilities. The 
original project scope included some already known rehabilitation and improvements items. However, as 
a result of the current assessment, additional items that were previously not identified or anticipated 
earlier would need to be included in the currently ongoing project. The following list briefly identifies the 
additional items. 
1. Process Air System upgrades at AWRF to replace all blowers and flow control valves with 
automatic control  
2. AWRF Administration Building modifications 
3. Vactor Truck Dump Station at AWRF 
4. 10,000 gallon fuel storage tank each at AWRF and OWRF 
The scope of services for this phase is identified in the following paragraphs. 
SCOPE OF SERVICES 
 
The ENGINEER will complete the following scope for Design Phase of the project. Subsequent phases of 
work, if any, such as construction-related services for the Project will be provided under separate 
contracts. 
TASK 1 - PROJECT MANAGEMENT 
The ENGINEER will perform various project management and monitoring activities throughout the 
project, as delineated in the following tasks and sub-tasks.  The ENGINEER shall prepare and submit 
regular monthly invoices and shall include a summary of the work completed for each billing cycle.  The 
ENGINEER shall prepare authorization for Use of Allowance and obtain CITY’s approval prior to 
beginning of any allowance work.

Prepare and distribute agenda and minutes for each meeting. Agenda will be submitted to the CITY at 
least two (2) days prior to the meeting. Minutes will be submitted to the CITY no more than five (5) days 
following each meeting. 
Project Meetings:  Conduct additional periodic project meetings with CITY representatives throughout 
the Project to keep the CITY informed of the project progress and obtain input and direction as required. 
The meeting objectives will include the presentation of alternative evaluations for CITY review and 
approval; results from data collection, and other outstanding project issues. The anticipated additional 
number of periodic meetings during this phase shall be six.  
 
Project Workshops: Conduct an additional coordination workshop with CITY and other project 
stakeholders as necessary to obtain input and feedback for the Airport WRF Administration Building 
modifications and dump station.  This workshop will facilitate interaction with CITY operations and 
maintenance (O&M) staff regarding the building layout and to identify current and future needs.  This 
workshop will assist the Project Architect to move forward with the detailed modifications to the 
building. 
TASK 200- PRELIMINARY DESIGN DEVELOPMENT 
Preliminary Design Report (PDR): The ENGINEER will provide summary description for 
improvements of processes or systems that have been added to the project. The ENGINEER shall advance 
the design concepts and provide preliminary design criteria, document the preliminary alternatives, 
schematics, layouts, and criteria developed and evaluated in previous tasks into an overall combined 
Preliminary Design Report for both facilities.  The PDR for the additional items shall include the 
following elements: 
x 
Compilation of the anticipated preliminary design criteria for the recommended improvements 
and supporting facilities, compiled from the preliminary criteria developed under previous tasks.  
x 
Preparation of a budgetary-level preliminary opinion of probable construction cost with project-
related administrative, general conditions, bonds, insurance and other indirect costs (including 
design and construction management related fees) will be included to determine a total project 
cost estimate. 
Preliminary Design Report will identify and finalize key design decisions to transition into detailed 
design.  The draft PDR with additional items will be submitted to CITY for review. Along with the PDR, 
30% design drawings will also be submitted for City’s review.  Upon receipt of comments, the 
ENGINEER will make appropriate revisions and submit a final PDR to the CITY.

Deliverables:  Draft and Final Preliminary Design Report (6 copies each and electronic copy) 
Drainage Reports: The ENGINEER will prepare a Drainage Report and preliminary Grading and 
Drainage Plan to document the incidental site drainage changes for this scope of work around the dump 
station. The Drainage Report will be submitted to the CITY along with the Agency Review submittal. 
The report will be included as an addendum to the PDR. 
Deliverables:  Drainage Report (electronic copies) 
Develop Process Control Descriptions: The process air system improvements at AWRF requires 
updated or new process control descriptions. The ENGINEER will coordinate and develop process 
control descriptions prior to the 30% design and will include them in the PDR. Once the descriptions are 
reviewed by the City and finalized, they will be part of the Project Specifications.  
Deliverables:  Process Control Descriptions will be part of PDR at 30% and Project Specifications from 
60% onwards (electronic copies) 
3. DETAILED DESIGN DEVELOPMENT 
The ENGINEER will prepare detailed construction documents for the Project.  In the event the City 
determines to select a CMAR for the project, the documents will be used by the CMAR to prepare the 
construction cost model and corresponding GMP, project schedule, equipment and subcontractor 
procurement; as well as by the regulatory agencies to issues applicable permits for the construction and 
operation of the Project.  Alternatively, the detailed design documents can be used for procuring the 
contractor using the bid method. 
Preparation of construction drawings and technical specifications will be as follows: 
1. 
Drafting and CADD Standards:  The organization and preparation of construction drawings shall 
be in accordance with the City drafting guidelines. 
2. 
Technical Specifications:  Technical specifications shall be prepared using the City’s Standard 
Specifications Guide Documents, Divisions 1 through 17. 
The Engineer will prepare progress submittal packages when the design, drawings, and specifications are 
considered 30, 60, and 90 percent (%) complete as described in this scope of services.  Two (2) copies of 
the progress submittal packages will be included with each submittal for City review.  The level of detail 
on the drawings in each progress submittal should be as given below. 
30% Progress Submittal: These level of drawings are used to convey information about the Project’s 
overall appearance and configuration to the City and other Project stakeholders.  These drawings are not 
intended for construction.  The lists of drawings and specifications for each discipline shall be ready for

City review.  The 30% drawings shall include Civil, Structural/Architectural, Electrical and 
Instrumentation Drawings. 
Process and Instrumentation Devices (P&ID) should be developed to a degree which depicts the 
following: 
x 
General instrumentation and control philosophy. 
x 
Type of instrumentation. 
x 
All primary and secondary control devices. 
x 
Process area designation, drawing and equipment numbering system identified. 
Preliminary Process Control strategies should be complete.  Process control strategies shall be discussed 
and reviewed with the plant personnel at a project workshop prior to the 30% submittal.  The draft 
process control strategies shall be submitted to the City prior to the meeting to provide sufficient time for 
City staff review. No specification submittal will be required at this time.  The 30% Progress Submittal 
will be made along with the PDR discussed in Task 200 above. 
Deliverables: Half size drawings (6 copies and a pdf copy).  General instrumentation philosophy 
document and conceptual process overview schematic. 
60% Progress Submittal: The drawings and specifications for each discipline are coordinated and have 
progressed where the design intent is established and must show the work in sufficient detail that a 
contractor can recognize elements and requirements for construction.  All comments from the 30% 
submittal are satisfactorily addressed.  The set of drawings shall include a cover sheet and an index sheet, 
Civil, Architectural, Structural, Mechanical, Electrical and Instrumentation Drawings.  Draft 
Specifications for major equipment shall be included in the submittal. 
The ENGINEER shall finalize the process control narratives for the additional elements at the WRFs 
along with all other design items, prior to completion of the 60% detailed design documents and after a 
detailed review of the narratives with the City staff. 
Deliverables: Half size drawings (6 copies and a pdf copy). Draft specifications for major equipment for 
the project along with a list of equipment vendors for City’s review.  Process Control Descriptions for all 
processes that are included in the project including descriptions for any new processes that are added. 
90% Progress Submittal (Agency Review Set): Drawings and details in all disciplines should be 
complete for all the additional design elements along with the other design items.  Specifications should 
be essentially complete.  Design calculations in all disciplines shall be essentially complete and checked.  
Comments on design, drawings and specifications from previous reviews must have appropriate 
responses before the 90% progress submittal is submitted.  Comments from both the 30 and 60 percent

reviews by City staff, any constructability reviews, and review comments from regulatory agencies must 
have appropriate responses or actions. 
Deliverables: Half size drawings (6 copies and a pdf copy), 3 full-size copies to be submitted to agencies 
for review. 
Final (100%) Contract Documents: Drawings and specifications should be complete and accepted by 
the City.  All construction documents should be complete and ready for construction pricing of the work.   
Deliverables: Half size drawings (6 copies, 1 full size copy and pdf and AutoCAD files), 1 full-size copy. 
Maintenance of Plant Operations (MOPOs): The ENGINEER shall identify additional preliminary 
MOPO list that will identify areas of construction of additional facilities that interfaces with the existing 
facilities.  The additional preliminary MOPO list shall be added to the other MOPO list along with the 
30% Submittal and included in the preliminary design report.  The preliminary MOPO list shall be used 
as the basis for development of the MOPO activities during the detailed design phase. 
MOPO development shall occur during preparation of drawings and specifications and the ENGINEER’s 
will include the following: 
x 
Assist CMAR in developing additional draft MOPOs to be added to the current design elements 
list with input from City operation and maintenance staff. 
x 
Incorporate additional MOPO requirements into the drawings and specifications. 
x 
Participate in a site walk-through with CMAR and the City operation and maintenance staff.  
Assist the CMAR in determining the MOPO durations, constraints, and shared responsibilities for 
MOPOs. 
x 
Review MOPOs prepared by the CMAR, incorporate the MOPOs in the specifications. 
The MOPO list for City review will be included in the 60% and 90% Submittals.  The final MOPOs 
developed by the CMAR must have City approval and will be included in the construction documents 
with the final submittal. 
4. PERMITTING 
The ENGINEER will perform permitting coordination activities throughout the Design Phase, as 
delineated in the following tasks and sub-tasks. Specific permits, plans and reviews anticipated under this 
Project include: 
x 
City of Chandler- Building Permit (and Building Plan Review) 
x 
City of Chandler- Civil Plan Review 
x 
MCESD- Approval to Construct

x 
ADEQ Minor Amendment Application 
5. PROJECT DELIVERY METHOD ASSISTANCE 
The ENGINEER will assist the CITY with the CMAR project delivery method.  The scope of work for 
this task is identified below. 
CMAR Coordination:  In the event the City’s choses to use the Construction Manager at Risk project 
delivery method, the CM at Risk will be contracted to provide design phase services and then during 
construction will provide all services required of a general contractor.  The relationship between the CM 
at Risk and the Engineer is intended to be collaborative and proactive, both participating as advisors to the 
City during the design phase.  The City wants to incorporate a contractor’s perspective and input to the 
Project planning and design decisions and have the ability to select certain components of the Project for 
construction prior to full completion of design. 
Design Phase services by the CM at Risk may include: 
x 
Provide a conceptual and progressively more detailed cost model to confirm budgets and guide 
design decisions; 
x 
Provide detailed independent cost estimating and knowledge of market conditions; 
x 
Provide a construction management plan and schedule; 
x 
Provide alternate systems evaluation and constructability studies; 
x 
Provide long-lead procurement studies and possibly initiate procurement of long-lead items; 
x 
Provide procurement services for selection of subcontractors and suppliers; 
x 
Prepare the Guaranteed Maximum Price (GMP) for construction; 
The Engineer’s effort to coordinate with the CM at Risk will consist of: 
x 
Solicit CM at Risk input during design development as appropriate; 
x 
Provide information for cost estimating; 
x 
Provide assistance with long-lead procurement activities; 
x 
Evaluate alternative systems suggested by CM at Risk; 
x 
Respond to constructability review comments; 
x 
Attend subcontractor pre-selection meetings conduct by CM at Risk; 
x 
Assist and review during GMP development; 
x 
Perform GMP proposal review and prepare recommendation to City; 
x 
Assist City with review of the subcontractor/supplier bid and selection process.

The City may request the CM at Risk to proceed with early construction of certain project features before 
full project design is complete and request a GMP for that portion of the work.  The Engineer will prepare 
the appropriate construction documents for such work.  This may include; 
x 
Early Procurement of Long-Lead Equipment Items (items that may be included consists of: 
blowers, iris valves, and electrical equipment) to be identified by the Project Team. 
x 
Balance of Work 
In addition to coordination with the CMAR, attend meetings with the third party cost consultant and 
provide them with the project submittals to facilitate their review of CMAR’s GMP.  The ENGINEER 
will attend up to a total of four meetings with the cost consultant for two separate GMP packages. 
NOTE: A parallel cost estimate will not be performed as the CITY intends to hire a third-party cost 
estimator for additional cost model and GMP validation. 
6. Other Direct Costs 
Geotechnical Investigation: The ENGINEER will perform a geotechnical investigation with assistance 
from sub-consultant, which will include the drilling and sampling of up to four (4) test borings to 
determine subsoil conditions and provide samples for laboratory testing. The ENGINEER will submit 
draft Geotechnical Investigation Report to the CITY for review.  The ENGINEER will further coordinate 
and consult with geotechnical sub-consultant to obtain geotechnical design data for construction any new 
facilities.  The geotechnical investigation is limited to the OWRF site (as no new structures are 
anticipated at the Airport WRF as part of this project). 
The CMAR shall review the Geotechnical Investigation Report and supporting data, and coordinate any 
additional investigations that they may determine to be necessary to be borne directly by the CMAR. 
Deliverables:  Draft and Final Geotechnical Investigation Report (electronic copies) 
Topographical Site Survey: The ENGINEER with assistance from a sub-consultant will perform a site 
topographical survey to document the current conditions and surface features of the area proposed for the 
dump station at AWRF, the fuel storage tanks at the AWRF and OWRF and incidental paving/grading. 
Site survey will be based on City of Chandler datum and will include existing spot elevations for use in 
developing new contours; location and establishment of perimeter property lines based on existing legal 
descriptions, available survey reviews, and existing and future right-of-ways; and identification of above-
ground structures, other identified facilities, and existing trees. Site survey will also include identification 
of staked geotechnical borings and horizontal grid development for design. 
Deliverables:  Draft Site Topographical Maps (electronic copies)

HVAC Services: The ENGINEER will provide HVAC engineering services including structural 
drawings and specifications as required to support the preliminary and detailed design services for 
proposed improvements. 
Deliverables: HVAC Drawings and Specifications (electronic copies) 
Architectural Services: The ARCHITECT will provide architectural services including architectural 
drawings and specifications as required to support the preliminary and detailed design services for 
Administration Building modifications at the AWRF. 
Additional Engineering Allowance: This allowance is included for any new scope of work that the City 
may desire to be added to the project. Use of this allowance requires prior approval from the City.  
 
END OF SCOPE OF WORK

Project Name: Water Reclamation Facility Improvements Phase 3 – Amendment No. 1 
Page B-1 
Project No.: WW2206.201 
Rev. 3/12/2024 
EXHIBIT B 
FEE SCHEDULE 
Project No.: WW2401.201
Rev. 5/13/24

48,590.00
$          
Kick off Meeting
-
$                  
Project Meetings
27,760.00
$       
Project Workshops
20,830.00
$       
Project Schedule
-
$                  
97,740.00
$          
Preliminary Design Report
75,940.00
$       
Drainage Reports
7,770.00
$         
Develop Process Control Descriptions
14,030.00
$       
668,120.00
$        
30% Progress Submittal 
109,200.00
$     
60% Progress Submittal 
176,860.00
$     
90% Progress Submittal (Agency Review Set)
267,330.00
$     
Final (100%) Contract Documents
95,390.00
$       
MOPOs
19,340.00
$       
14,090.00
$          
City Permitting
3,670.00
$         
MCESD Permitting
4,830.00
$         
ADEQ APP Coordination
5,590.00
$         
ADWR Coordination
-
$                  
32,860.00
$          
Coordination with CMAR
32,860.00
$       
126,865.00
$        
Geotechnical Investigation
10,000.00
$       
Topographical Site Survey
2,500.00
$         
Architectural Services
54,065.00
$       
HVAC Services
30,300.00
$       
Reimbursable Expenses (Premit Fees, Printing etc)
Additional Engineering Allowance
30,000.00
$       
39,530.60
$          
TOTAL COST:
1,027,795.60
$     
City of Chandler
WRFs Phase 3 Improvements Project - Contract Amendment 01
EXHIBIT "B-1"
TASK DESCRIPTION
2. Preliminary Design Development
Cost Plus Reimbursible Per Task
3. Detailed Design Development
4. Permitting 
5. Project Delivery Method Assistance
7. Owner's Allowance
 SUBTOTAL 
1. Project Management
6. Other Direct Costs
City Project No.: WW2401.201

Principal
Sr. PM
Sr. PM (E/I, 
Str., 
Process)
Sr. Engr.
Project Engineer / Proj. 
Prof
Lead EI&C
CADD 
Technicians
Admin
Uday 
Gandhe
Sreeram R.
Jaco K.
Luis C.
Damien T. 
Tony L.
Jason G.
Chris Y.
Scott L.
Katie G.
Alex G.
Sean Z.
Vineet A.
Sydney A.
Muthu K.
Sai N.
Yago Freire
Channing A.
Minhee P.
Xavier G.
Elvin R.
Sai C.
Kam C., 
Chase M.
Amber A.
Erin B.
Calvin G.
Paulina D.
Mikayla R.
 $     265.00  $       245.00  $     225.00  $          190.00  $                             145.00  $        175.00  $           125.00  $         95.00 
8
16
28
76
104
8
32
14
286
Kickoff Meeting
0
Project Meetings
4
8
12
40
64
8
24
8
168
Project Workshops
4
8
16
36
40
0
8
6
118
Project Schedule
0
14
30
48
104
224
32
120
32
604
Preliminary Design Reports
12
24
36
80
160
32
100
24
468
Drainage Report
0
2
4
8
24
0
8
4
50
Develop Process Control Descriptions
2
4
8
16
40
0
12
4
86
36
160
288
680
1408
338
1178
156
4244
30% Progress Submittal
8
32
60
120
240
40
160
12
672
60% Progress Submittal
8
32
80
160
360
100
360
40
1140
90% Progress Submittal (Agency Review Set)
12
60
100
260
560
150
500
80
1722
Final (100%) Contract Documents
4
24
40
120
200
40
150
20
598
MOPOs
4
12
8
20
48
8
8
4
112
0
6
0
16
40
0
12
24
98
City of Chandler Coordination
2
0
4
8
0
4
8
26
MCESD Coordination
2
0
4
16
0
4
8
34
ADEQ APP Coordination
2
0
8
16
0
4
8
38
ADWR Coordination
0
4
16
24
40
80
8
12
4
188
Coordination with CMAR
4
16
24
40
80
8
12
4
188
0
0
0
0
0
0
0
0
0
62
228
388
916
1856
386
1354
230
5420
EXHIBIT "B-2"
1. Project Management
2. Preliminary Design Report
TOTAL HOURS  
PER TASK
< PROJECT ROLE
< NAME OF PERSON
 < HOURLY RATES 
Hours and Rates
City of Chandler
WRFs Phase 3 Improvements Project - Contract Amendment 01
City Project No.: WW 2401.201
6. Other Direct Costs
5. Project Delivery Method Assistance
TOTAL HOURS:
TASK DESCRIPTION
3. Detailed Design Development
4. Permitting
7. Owner's Allowance