Agenda packet, closed session, second session — Visalia City Council, October 6, 2025 (part 2 of 6)

To accompany Proposal
WORKERS’ COMPENSATION INSURANCE CERTIFICATE

STATE OF CALIFORNIA )
) ss

CITY OF VISALIA )
I am aware of the provisions of Section 3700 of the Labor Code which requires every employer to be insured against liability for workers’ compensation or to undertake self-insurance in accordance with the provisions of that code, and I will comply with such provisions before commencing the performance of the work under this contract.

Company: _________________________________________
Business Address: _________________________________________ Signature: _________________________________________
Name of Signing Official:_________________________________________ Title of Signing Official: _________________________________________ Date: _________________________________________
Company Seal (if any):

Carollo Engineers, Inc.
1401 Fulton Street, Suite 802, Fresno, CA 93721
Associate Vice President
Reace Fisher
July 14, 2025
277
Visalia WRF Digester 9 Design
RFP NO. 24-25-07

Page 18 of 31 ends

To accompany Proposal

EQUAL EMPLOYMENT OPPORTUNITY COMPLIANCE CERTIFICATE
Equal Opportunity Clause
Unless exempted by rules, regulations or orders of the Secretary of Labor issued pursuant to Executive Orders 28925, 11114 or Section 204 of Executive Order 11246 of September 24, 1965, during the performance of each contract with the City of Visalia, the contractor agrees as follows:

1. The vendor will not discriminate against any employee or applicant for employment because of race, color, religion, gender, national origin or political affiliation. The contractor will take affirmative action to ensure that applicants are employed, and that employees are treated during employment, without regard to their race, color, religion, gender, national origin or political affiliation. Such action shall include, but not be limited to, the following: employment upgrading, demotion or transfer, recruitment or recruitment advertising, layoff or termination, rates of pay or other forms of compensation, and selection for training, including apprenticeship. The contractor agrees to post in conspicuous places, available to employees and applicants for employment, notices to be provided by the contracting officer setting forth the provisions of this nondiscrimination clause.

2. The vendor will, in all solicitations or advertisements for employees, placed by or on behalf of the contractor, state that all qualified applicants will receive consideration for employment without regard to race, color, religion, gender, national origin or political affiliation.

3. The vendor will send to each labor union or representative of workers with which he has a collective bargaining agreement or other contract or understanding, a notice to be provided by the agency contracting officer, advising the labor union or the workers’ representative of the contractors’ commitments under Section 202 of Executive order 11246 of September 24, 1965, and shall post copies of the notice in conspicuous places available to employees and applicants for employment.

4. The vendor will comply with all provisions of Executive Order 11246 of September 24, 1965, and the rules, regulations and relevancy orders of the Secretary of Labor.

Vendor will furnish all information and reports required by Executive Order 11246 of September 24, 1965, and by the rules, regulations and relevant orders of the Secretary of Labor, or pursuant thereto, and will permit access to his books, records and accounts by the contracting agency and the Secretary of Labor for purposes of investigation to ascertain compliance with such rules, regulations and orders.

5. In the event of the vendor’s non-compliance with the non-discrimination clauses of this subcontract or with any of such rules, regulations or orders, this subcontract may be canceled, terminated or suspended, in whole, or in part and the vendor may be declared ineligible for further government contracts in accordance with the procedures authorized in accordance with Executive Order 11246 of September 24, 1965, and such other sanctions may be imposed and remedies invoked as provided in Executive Order 11246 of September 24, 1965, or by rule, regulation or order of the Secretary of Labor, or otherwise provided by law.

6. The vendor will include the provisions of Paragraphs (1) through (7) in every subcontract or purchase order unless exempted by rules, regulations or orders of the Secretary of Labor issued pursuant to Section 204 of Executive Order 11246 of September 24, 1965, so that such provisions will be binding upon each Subcontractor or vendor. The contractor will take such action with respect to any subcontract or purchase order as the contracting agency may direct as a means of enforcing such provisions including sanctions for non-compliance. Provided, however, that in the event the contractor becomes involved in, or is threatened with litigation with a subcontractor or vendor as a result of such direction by the contracting agency, the contractor may request the United States to enter into such litigation to protect the interest of the United States.

Certification on Non-Segregated Facilities
The contractor hereby certifies that it does not or will not maintain segregated facilities not permit its employees to work at locations where facilities are segregated on the basis of race, color, religion, gender, national origin or political affiliation. ___________________________ _______________________________ __________ Name of Firm Authorized Signature Date
Carollo Engineers, Inc. July 14, 2025
278
Visalia WRF Digester 9 Design
RFP NO. 24-25-07

Page 19 of 31 ends

To accompany Proposal
The following disclosure and statement apply to the Bidder/Proposer/Contractor/Consultant/ Vendor/Supplier or Company:

1. submitting a bid or proposal in response to a solicitation by City of Visalia; or

2. as Awardee of a contract/purchase order which is subject to approval by the Visalia City Council.

OWNERSHIP DISCLOSURE
____________________________________________________________________________ Name of Bidder/Proposer/Contractor/Consultant/Vendor/Supplier or Company _________________________________________________________________________________________________________ Address
List the names of all principals, partners, and/or trustees. For corporations, provide names of officers, directors and all stockholders owning more than 10% equity interest in corporation:
___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________

CALIFORNIA LEVINE ACT STATEMENT
California Government Code Section 84308, also know as the “Levine Act,” can prohibit members of the Visalia City Council from participating in any action related to a contract if he or she receives any political contributions totaling more than $250 within the previous twelve (12) months, and for twelve (12) months following the date a final decision concerning the contract has been made, from the person or company awarded the contract. The Levine Act also requires disclosure of such contribution(s) by a party to be awarded a specific contract.

The following website contains a list of current Visalia City Council Members, https://www.visalia.city/government/city_council/default.asp. You are responsible for reviewing the names of Visalia City Council Members prior to making the following disclosure:

1. Have you or your company, or any agent on behalf of you or your company, made any political contributions of more than $250 to a Visalia City Council Member in the twelve (12) months preceding the date of the submission of your proposals or the anticipated date of any City Council action related to this contract? YES:_____ NO:_____. If yes, please identify the City Council Member(s) and date(s) of contribution in the space below:

Council Member(s) Name Date of Contribution(s)
Answering YES, does not preclude the City of Visalia from awarding a contract to your firm or from taking any subsequent action related to the contract. It does, however, preclude the identified Visalia City Council Member(s) from participating in any actions related to this contract.

NOTICE: The disclosure duty under state law continues for twelve (12) months after the award. If the above information regarding contributions changes during this time after the award, then the awardee is required to update this disclosure form.
____________________________________________________________________________ Print or Type Name of Bidder/Proposer/Contractor/Consultant/Supplier/Vendor/Company __________________________________________ _____________________________ Signature of Company Authorized Individual Print or Type Name of Authorized Individual X
Carollo Engineers, Inc.
1401 Fulton Street, Suite 802, Fresno, CA 93721
N/A
Reace Fisher
Carollo Engineers, Inc.
279
Visalia WRF Digester 9 Design
RFP NO. 24-25-07

Page 20 of 31 ends

To accompany Proposal

AMERICANS WITH DISABILITIES ACT COMPLIANCE CERTIFICATE
By submission of a bid, the BIDDER certifies it will comply with the Americans with Disabilities Act, 42 U.S.C., 12101 et. seq., and will maintain compliance throughout the life of this Contract. By commencing performance of the Contract work, the selected BIDDER certifies to the Americans with Disabilities Act compliance.

Company: ______________________________________________ Business Address: ______________________________________________ Signature: ______________________________________________ Name of Signing Official: ______________________________________________ Title of Signing Official: ______________________________________________ Date: _______________________________________
Company Seal (if any):

Carollo Engineers, Inc.
1401 Fulton Street, Suite 802, Fresno, CA 93721
Reace Fisher
Associate Vice President
July 14, 2025
280
Visalia WRF Digester 9 Design
RFP NO. 24-25-07

Page 21 of 31 ends

To accompany Proposal

STATE OF CALIFORNIA

DRUG-FREE WORKPLACE CERTIFICATION
STD.21 (REV.12-93)

CERTIFICATION
I, the official named below, hereby swear that I am duly authorized legally to bind the contractor or grant recipient to the certification described below. I am fully aware that this certification, executed on the date below, is made under penalty of perjury under the laws of the State of California.

CONTRACTOR/BIDDER FIRM NAME FEDERAL ID NUMBER
BY(Authorized Signature) DATE EXECUTED
PRINTED NAME TELEPHONE NUMBER (Include Area Code)
( )
TITLE
CONTRACTOR/BIDDER FIRM’S MAILING ADDRESS
The contractor or grant recipient named above hereby certifies compliance with Government Code Section 8355 in matters relating to providing a drug-free workplace. The above named contractor or grant recipient will:

1. Publish a statement notifying employees that unlawful manufacture, distribution, dispensation, possession, or use of a controlled substance is prohibited and specifying actions to be taken against employees for violations, as required by Government Code Section 8355(a).

2. Establish a Drug-Free Awareness Program as required by Government Code Section 8355(b), to inform employees about all of the following:
(a) The dangers of drug abuse in the workplace,
(b) The person’s or organization’s policy of maintaining a drug-free workplace, (c) Any available counseling, rehabilitation and employee assistance programs, and (d) Penalties that may be imposed upon employees for drug abuse violations.

3. Provide as required by Government Code Section 8355©, that every employee who works on the proposed contract or grant:
(a) Will receive a copy of the company’s drug-free workplace policy statement, and (b) Will agree to abide by the terms of the company’s statement as a condition of employment on the contract or grant.

4. At the election of the contractor or grantee, from and after the “Date Executed” and until ____________ (NOT TO EXCEED 36 MONTHS), the state will regard this certificate as valid for all contracts or grants entered into between the contractor or grantee and this state agency without requiring the contractor or grantee to provide a new and individual certificate for each contract or grant. If the contractor or grantee elects to fill in the blank date, than the terms and conditions of this certificate shall have the same force, meaning effect and enforceability as if a certificate were separately, specifically, and individually provided for each contract or grant between the contractor or grantee and this state agency.

Carollo Engineers,Inc. 86-0899222
Reace Fisher
Associate Vice President
July 14, 2025
559 696-4961
1401 Fulton Street, Suite 802, Fresno, CA 93721
September 2028
281
Visalia WRF Digester 9 Design
RFP NO. 24-25-07

Page 22 of 31 ends

To accompany Proposal

IRAN CONTRACTING ACT CERTIFICATION
(Public Contract Code Section 2200 et seq.)
As required by California Public Contract Code Section 2204, the Contractor certifies subject to penalty for perjury that the option checked below relating to the Contractor’s status in regard to the Iran Contracting Act of 2010 (Public Contract Code Section 2200 et seq.) is true and correct:
⃝ The Contractor is not:
(1) Identified on the current list of persons and entities engaged in investment activities in Iran prepared by the California Department of General Services in accordance with subdivision (b) of Public Contract Code Section 2203; or
(2) A financial institution that extends, for 45 days or more, credit in the amount of $20,000,000 or more to any other person or entity identified on the current list of persons and entities engaging in investment activities in Iran prepared by the California Department of General Services in accordance with subdivision (b) of Public Contract Code Section 2203, if that person or entity uses or will use the credit to provide goods or services in the energy sector in Iran.
⃝ The City has exempted the Contractor from the requirements of the Iran Contracting Act of 2010 after making a public finding that, absent the exemption, the City will be unable to obtain the goods and/or services to be provided pursuant to the Contract. ⃝ The amount of the Contract payable to the Contractor for the Project does not exceed $1,000,00 over the life of the contract (up to 5 years).

Signature:____________________________________ Printed Name:_________________________ Title:______________________________________ Agency Name:_____________________________ Date:____________________
Note: In accordance with Public Contract Code Section 2205, false certification of this form shall be reported to the California Attorney General and may result in civil penalties equal to the greater of $250,000 or twice the Contract amount, termination of the Contract and/or eligibility to bid on contracts for three years.

Reace Fisher
Associate Vice President Carollo Engineers, Inc.

July 14, 2025
x
282
B. Proposed Program
Approach
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CAROLLO / PROPOSAL / JULY 2025 2
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) B
Project Overview
The City’s goal for this project is clear: build a ninth digester and ancillary facilities to give you the capacity and redundancy you need to reliably digest solids and perform cleaning and maintenance on your existing facilities. This project offers the City not only the opportunity to add a new digester, but to also set up your digestion facility for further expansion and improvements in the future.

The schematic below illustrates some of our initial technical ideas about specific elements of the new digester design. These ideas, which focus on providing redundancy, flexibility, ease of O&M, and facilitating future expansion, are further described in the subsequent discussions.

The WRF is limited in its ability to reliably digest the solids load at the plant and lacks flexibility to perform the necessary cleaning and maintenance of existing digesters. Carollo's team will design a facility that provides muchneeded capacity and flexibility to serve the WRF into the future.

Carollo's team offers a
blend of plant familiarity
and process expertise
to effectively and
efficiently design the
right project for the City.

Proposed Program Approach
86VIS0725pf1-New-Digesters.ai
Set up the facility for future
expansion with flexible feed
options and space for growth.
1 Seamlessly integrate new
boiler into existing heat loop
for reliable digester heating.
4 Select mixing and heating systems
for variable level operation, flexible
feed configurations, and eective
performance.
2 Design digester with
features to mitigate
foaming and provide
ease of O&M.
3 Digester 1-2
Digester 8
Digester 9
Boiler 4
Sludge
Transfer
Pump
Station
Primary
Sludge
TWAS
Heat to digestion
Hot Water Loop
Digested
Sludge
Dewatering
Feed
Flexible level for
dewatering feed
Digester 3-7
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B. PROPOSED PROGRAM APPROACH

CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) CAROLLO / PROPOSAL / JULY 2025 3
\\IO-BD-1\BD-Data\Marketing\Pursuits\Client86(FNO)\Visalia\WRFDigester9Design\Prop0625\Indd\02-Proposed-Program-Approach A layout designed for future demands
The average annual influent flow to your facility is expected to almost double in the next 20 years. That’s why it’s critical for this design to consider digestion requirements beyond Digester 9 and to include thoughtful layout of the facility to allow for future growth. We will first confirm your flows and loads, redundancy and reliability criteria, future improvement plans, and issues that impact O&M and performance. As part of this process, we will also confirm the recommendations from Carollo’s 2024 Master Plan to allocate space for Digester 10 and a dedicated sludge storage/dewatering feed tank in the future that would allow all digesters to operate in parallel at their maximum side water depth. Based on your feedback, we will develop a site plan that best uses the open area to the west of Digester 8. This could include leaving space for a future Digester 11, as shown in the figure to the right, that could replace the capacity of some of your existing aging digesters if that is determined to be beneficial in the future.

In addition to laying out the site for future expansion, it’s also important to provide flexibility in digester feeding and withdrawal. Currently, Digesters 1-2 digest primary sludge while Digesters 3-7 digest primary sludge and TWAS. The partially digested sludge from Digesters 1-7 is then pumped to Digester 8 for final digestion and transfer to the dewatering system. However, this setup doesn’t provide flexibility to be able to take Digester 8 offline. As shown in the process schematic on the previous page, we recommend adding piping to directly feed primary sludge and TWAS to Digester 9 and piping to route digested sludge from Digester 9 to the Sludge Transfer Pump Station. This provides flexibility for either Digester 8 or 9 to operate as a sludge storage digester, providing redundancy to be able to take either digester offline for maintenance.

Our team is already familiar with your yard piping and will identify the preferred routing and tie-in locations for digester feed and sludge transfer piping and our digestion experts will develop a construction sequence that minimizes disruptions to plant operations. 1 Set up the facility for future expansion with
flexible feed options and space for growth
Digester
2 Digester1
Digester
4 Digester
7 Digester
5 Digester
6 Digester
9 Digester
11 (Future)
Digester
10 (Future)
Gas
Holder
Sludge
Storage
(Future)
Digester
8 Digester
3 Existing digestion
facilities
Existing gas
utilization facilities
Existing dewatering
facilities
Proposed digestion
facility expansion for
this project
Possible future
digestion facility
expansion
1 2
3 4
5 6
7 9
9 10
8 Digester
9 B
A
1 86VIS0725pf4-Future-Expansion-Aerial.ai
| Our site layout will consider digestion needs beyond Digester 9 so that you are setup for future expansion. In this figure we have shown a possible configuration with space allocated for future Digesters 10 and 11 and a dedicated sludge storage tank. 1 A
B
Digester 9 Equipment Area
Standpipe and sludge transfer pumps.

See discussion on subsequent pages.

Digester heating and mixing systems.

See discussion on subsequent pages.

Sludge Transfer Pump Station
Boiler 3
Boilers 1 and 2
Electrical and Boiler Building
Biogas Flare
Microturbine Facility
Gas Purification Facility
Dewatering Facilities
Administration Building
2 3
4 5
6 7
9 8
10 285
B. PROPOSED PROGRAM APPROACH
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Heating
The heating requirements for Digester 9 will vary
depending on whether it is fed primary sludge and
TWAS directly or if it is fed partially digested sludge from Digester 1-7 that has already been heated to
mesophilic temperatures. If direct feeding of Digester
9 is desired, we will consider both conditions when
sizing the heat exchanger and associated recirculation
systems to provide flexibility for either operation.

The existing digesters use spiral heat exchangers.

We will also evaluate tubular heat exchangers,
which are less susceptible to clogging. For either
technology we will design a secondary heat loop with
instrumentation to automatically maintain a setpoint
digester temperature while also limiting the hot water
temperature and the change in sludge temperature
across the exchanger to help mitigate sludge baking
onto the heat exchanger and vivianite formation.

Mixing
Proper mixing is key to digester health and
performance. Carollo has extensive experience
evaluating mixing technologies and will work with you
to select the right technology for Digester 9.

Digester 1-8 currently use Vaughan’s Rotamix system
with chopper pumps, floor mounted mixing nozzles,
and one wall mounted nozzle for foam mitigation
similar to the system that Carollo recently designed
for the City of Burlingame. There are several possible
enhancements that we could consider for Digester 9
if desired:
Pump with VFD: We worked with Oro Loma
Sanitary District to add VFDs to two of their mixing
pumps to allow them to optimize the mixing rate,
reduce foaming potential, and save energy cost.

Mixing rate control is especially critical for a variable level digester. Typically, pump mixing systems are
designed to turnover the digester every 3-4 hours.

Without a VFD, the turnover rate will increase as the
level in the tank decreases which can cause foaming
and unnecessary energy expense. A VFD allows you
to dial in the pump speed and maintain the target
turnover even as the volume in the tank varies.
Engineered piping and nozzle system: Rather
than specifying a vendor-packaged pump mixing
system like Rotamix, Carollo can also design a pump
mixing system like we recently did for variable level
digesters at Inland Empire Utilities Agency RP-1.

The design would include a chopper pump (with
or without a VFD) and strategically placed nozzles.

A key advantage of the engineered system is that
each leg of the system can be isolated with valves,
providing flexibility for mixing. Also, Carollo’s design maintains lower velocities at the nozzles than
vendor-designed systems, reducing the chances of
foaming events.

If interested, other technologies such as Ovivo’s low
energy LM mixers or Anaergia’s high solids impeller
mixers, both of which Carollo designed for the City
of South San Francisco, can also be evaluated to
determine which is optimal for you.
2 Select mixing and heating systems for variable
level operation and effective performance

TIT TIT

TIT TIT
86VIS0725pf7-Secondary-Heat-Loop.ai
Three-way valve
modulates amount of hot
water to the exchanger.

Temperature indicating transmitters
track hot water and sludge
temperature to provide information
to modulate the three-way valve.

Digester
Primary Heat Loop
| We will design a secondary heat loop system sized
for flexible digester feed and with provisions to
mitigate sludge baking onto the heat exchanger and
vivianite formation.
286
B. PROPOSED PROGRAM APPROACH
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Provide large access manways
and sampling ports
Simple features such as isolation provisions, gas
piping purge ports, sampling ports, and optimally
placed and sized access manways on the top and
side walls of the digesters can go a long way in the
operation and maintenance of a digester. We will
work with you to understand the features of your
existing digesters that you like and discuss areas for
improvements with the goal of providing a system
that can be easily operated and maintained.

Install redundant level
measurement to detect
foaming early
Our design will incorporate two types of level
instrumentation, a pressure sensor and a radar level
sensor, used in conjunction to detect foaming events
so that they can be addressed quickly. The pressure
sensor, which is mounted low on the side of the
tank, measures the pressure exerted by the water
column while the radar sensor, which is mounted on
the top of the tank, measures the surface level. As
shown in the diagram below, the two instruments will
provide a similar measurement when there is minimal
foaming. However, when foaming occurs, the pressure
instrument will have a lower reading because the
foam is less dense than the sludge. An alarm can
be provided to notify operations staff when the two
readings differ, allowing for process intervention.
3 Design digester with features to mitigate
foaming and provide ease of O&M
Sludge withdrawal
Our digester design will include features to maximize the usable digester volume such as a standpipe and cone
withdrawal. The standpipe, which would be designed
with multiple connection points to accommodate the
variable level, allows for filaments, foam, and scum
to be frequently removed from the surface of the
digester. The cone withdrawal allows for grit that would typically accumulate at the bottom of the cone to
also be frequently removed. We will include flexibility and access to be able to waste sludge to the newly
designed digester cleaning pond. Motorized valves on
the standpipe and the piping to the dewatering feed
pumps will allow for bottom and surface withdrawal to
occur at preprogrammed intervals.
86VIS0725pf6-Digester-Volume-Schematic.ai
Cone withdrawal
manages grit layer.

Surface
withdrawal
manages
floating layer.

M
M
M
M
M
86VIS0725pf8-Radar-Sensor.ai
Radar level sensor
Minimal
foaming
Pressure
sensor
Pressure
Radar
Level
Measurement
Time
Both levels
are similar
Radar level sensor
Extensive
foaming
Pressure
sensor
Pressure
Radar
Level
Measurement
Time
Pressure level is less
than radar level
287
B. PROPOSED PROGRAM APPROACH
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Our goal is to set up your new boiler facility such that it can be easily expanded as your plant influent continues to grow. For example, the capacity evaluation in Step A may indicate that the new facility should be designed
with space to accommodate future installation
of a second new boiler to address redundancy
requirements and possible decommissioning of aging
Boiler 3. As a potential cost saving option, we can also consider designing an outdoor boiler facility protected by a canopy as we recently did for IEUA RP-1.

C. Integrate into your heat loop
The new boiler will not only serve the new digester
but will integrate into the heat loop serving your entire digestion facility. First, we will confirm that the existing primary heat loop pumps have sufficient capacity
to meet the heating demands of the entire system.

Then, we will design a secondary heat loop, similar
to the secondary loops that you have for Boilers 1–3.

Our team includes Darrell Buhman who has extensive
experience expanding heating systems. We will work
with you to develop a construction sequence that
limits downtime of the existing heat loop, so that your existing digester heatings systems stay up and running.

D. Permit for digester gas
Currently you have limitations on operating your existing boilers with digester gas, in part because of permitting restrictions. That’s why we’ve included air permitting
expert, Courtney Mizutani, to navigate the SJVAPCD to
obtain the Authority to Construct for the digester, and receive approval for flexible operation of a new boiler.

Designing and permitting the new boiler for both natural gas and digester gas will save energy costs, reduce
emissions, and provide operational flexibility.

A. Right-size boiler
Boiler 3 is over 25 years old and has significant corrosion and piping defects. Additionally, Digester 9 will increase the sludge heating requirements. Therefore, a new
boiler is needed to maintain sufficient firm capacity for your facility. The first step to expanding your digester heating capacity is to select the right size boiler. We will accomplish this by comparing projected heat demands
with the capacity of existing Boilers 1-3 as we have in the figure below. We will also work with you to understand
your boiler redundancy requirements for both max
month and average conditions as well as consider
options for replacing the capacity of aging Boiler 3.

B. Select boiler type and location
We will consider firebox, Scotch Marine fire-tube, and
flexible watertube boilers and select the one that
best meets your requirements for cost, footprint, and
O&M preferences.
4 Seamlessly integrate new boiler into existing
heat loop for reliable digester heating
| We will estimate your current and future digester heat demands to right size your new boiler to provide the capacity and redundancy for reliable digester heating.
86VIS0725pf2-Reliable-Digester-Heating.ai
Evaluate existing
and future heating
requirements to
right-size your
boiler.

Select cost eective
boiler type and
location considering
future growth.

Design boiler to
seamlessly tie
into your existing
heat loop.

Permit boiler for
beneficial use of
digester gas.

0.0 2.0

4.0 6.0

8.0 10.0

12.0 14.0
2025 2030 2035 2040 2045
M
MBTU/hr
Year
Estimated Max
Heat Demand
D10 online
Redundant
Capacity
86VIS0725pf3-Boiler-Sizing-Graph.ai
TWAS
improvements
D9 and new
boiler online
Firm
Capacity
288
B. PROPOSED PROGRAM APPROACH
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Schedule
The schedule below was developed based on our current understanding of the level of effort required to deliver this project. Our team is ready to begin working on this project immediately and will work with you to meet your schedule requirements.

Schedule
2025 2026 2027 2029

TASK DESCRIPTION AUG SEP OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC JAN FEB APR

1.0 Project Management

1.1 Project Management and Meetings

2.0 Preliminary Design

2.1 Conduct Topographic Survey

2.2 Conduct Geotechnical Investigation

2.3 Preliminary Design Report

3.0 Detailed Design

3.1 Develop 50% Design

3.2 Develop 90% Design

3.3 Develop 100% Final Design Package

4.0 Permitting

4.1 CEQA Permitting

4.2 SJVAPCD Permitting

5.0 Construction Support Services

5.1 Bid Support

5.2 Engineering Services During Construction
86VIS0725ps-schedule.indd
LEGEND
Feb 2027 to April 2029
Task Workshop Progress Meeting Deliverable
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B. PROPOSED PROGRAM APPROACH
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Exceptions
Carollo has reviewed the RFP and the draft agreement
and requests the following changes which were
effectuated in the April 26, 2024 agreement with
the City of Visalia for the Near Term Solids Handling
Improvement Project.

Exceptions:
XII, A:
» In the 4th line: Strike “or consequential damages.”
» In the 4th line, replace “errors or omissions” with
“recklessness or willful misconduct.”
XII, B:
» In the 2nd line, strike “or consequential damages.”
» Add to end of sentence: “In no event shall the
cost to defend charged to Consultant exceed
Consultant’s proportionate percentage of fault.”
Requested Additions:
XI, add new section D:
» “D. CITY-Provided Information and Services: The
CITY shall furnish the CONSULTANT available
studies, Reports and other data under the control
of the CITY and pertinent to the CONSULTANT's
services; obtain or authorize the CONSULTANT
to obtain or provide additional reports and data
as required; furnish to the CONSULTANT services
of others required for the performance of the
CONSULTANT's services hereunder upon request
by CONSULTANT and agreement by the CITY,
and the CONSULTANT shall be entitled to use
and rely upon all such information and services
provided by the CITY or others in performing the
CONSULTANT's services under this Agreement.”
XII, add new sections after “C”:
» “D. Notwithstanding any other provision of this
Agreement, and to the fullest extent permitted by
law, neither the CITY nor the CONSULTANT, their
respective officers, directors, partners, employees,
contractors or subconsultants shall be liable to
the other or shall make any claim for any remote
or speculative breach of contract damages that
the breaching party could not have reasonably
foreseen when entering into this Agreement.

To the extent this Agreement is considered a
"Construction Contract" as defined by California
Civil Code section 2783, CONSULTANT's duty to
indemnify CITY under this or any other provision of
the Agreement shall not apply when to do so would
be prohibited by California Civil Code section 2782.
» E. The CONSULTANT shall not be responsible
for warranties, guarantees, fitness for a particular
purpose, breach of fiduciary duty, loss of
anticipated profits or for economic, incidental
or consequential damages to the CITY or any
third party arising out of breach of contract,
termination, or for any other reason whatsoever.

Additionally, the CONSULTANT shall not be
responsible for acts and decisions of third parties,
including governmental agencies, other than
the CONSULTANT's subconsultants, that impact
project completion and/or success.”
Section XIV, add new sections A-C:
» “A. Standard of Care: The CONSULTANT shall
perform the services required hereunder in
accordance with the prevailing standard of care by
exercising the skill and ability ordinarily required
of consultants performing the same or similar
services, under the same or similar circumstances,
in the State of California.
» B. Estimates and Projections: The CONSULTANT
has no control over the cost of labor, materials,
equipment or services furnished by others, over
the incoming water and/or wastewater quality
and/or quantity, or over the way the CITY's plant
and/or associated processes are operated and/
or maintained. Data projections and estimates
are based on the CONSULTANT's opinion based
on experience and judgment. The CONSULTANT
cannot and does not guarantee that actual costs
and/or quantities realized will not vary from the
data projections and estimates prepared by
the CONSULTANT and the CONSULTANT will
not be liable to and/or indemnify the CITY and/
or any third party related to any inconsistencies
between the CONSULTANT's data projections
and estimates and actual costs and/or quantities
realized by the CITY and/or any third party in
the future.
» C. Third Parties: The services to be performed
by the CONSULTANT are intended solely for
the benefit of the CITY. No person or entity not
a signatory to this Agreement shall be entitled
to rely on the CONSULTANT's performance of
its services hereunder, and no right to assert a
claim against the CONSULTANT by assignment
of indemnity rights or otherwise shall accrue
to a third party as a result of this Agreement
or the performance of the CONSULTANT's
service hereunder.”
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Scope of Work

1.0 – PROJECT MANAGEMENT

1.1 – Project Management and Meetings
Carollo will provide project administration and
management necessary to perform the planning,
execution, monitoring, and reporting of the
project elements.

Carollo will lead monthly meetings with City staff and
key project team members to provide updates on
progress and address any issues or concerns.

Carollo will lead a kickoff meeting with the City and the project team to review the scope and schedule. The
project team will present and seek feedback on key
design elements.

Deliverables:
Monthly invoices and associated progress letter
reports, including budget and schedule updates.
Kickoff and monthly meeting agendas and minutes.

Assumptions:
The design phase of the project has a duration of
14 months.
The kickoff meeting will include travel for three key expert team members to attend in person and other
key project team members will attend remotely
as necessary.
Monthly progress meetings will be held remotely
and will be attended by the Project Manager,
Project Engineer, and other key team members,
as necessary.

2.0 – PRELIMINARY DESIGN

2.1 – Conduct Topographic Survey
Carollo will contract with a subconsultant to
provide surveying professional services. Surveying
subconsultant will develop a topographic map of the
proposed project site to serve as a base map for the
design and to determine elevations of the existing
surface and critical infrastructure. Ground control
surveys will be performed, and temporary benchmarks
will be established at the project site. Mapping will be performed based on a specified horizontal and vertical
datum. Carollo Senior Professionals will review the
surveying deliverable for accuracy and incorporation
into future design deliverables.

2.2 – Conduct Geotechnical Investigation
Carollo will contract with a subconsultant to provide
professional geotechnical services. Geotechnical
consultant will perform borings onsite within
the proposed project area and develop a draft
and final report to determine site conditions and
recommendations for the site grading and subgrade
requirements. Senior Professionals will review the
draft geotechnical report and provide feedback for
incorporation into a final geotechnical report.

2.3 – Preliminary Design Report
Carollo will develop a Preliminary Design Report (PDR)
to serve as the basis for developing the detailed design of the digester and ancillary facilities. The historical data analysis and future projections completed as part
of the 2024 Master Plan will be used as the basis for
sizing digestion facilities. The Digester 9 tank will be similar in size and configuration as Digester 8. The PDR will include the following elements:
Evaluation and recommendation of equipment.
» Digester 9 mixing system.
» Digester 9 sludge heating system.
» Boiler 4 type, capacity, and integration with
existing hot water loop.
» Digester 9 digested sludge transfer pumps.
» Digester 9 ferric chloride feed system.
» Digester 9 features, including cover type, gas
equipment, manway access, and coating system.
Recommend digester feed and dewatering feed
strategy for new Digester 9 and integration with
Digester 8.
Identify tie in locations for key utilities including primary sludge, thickened waste activated sludge,
digested sludge, hot water return and supply,
digester gas, ferric chloride, and electrical power.
Confirm MCC/boiler building type and
approximate layout.
Identify key project components and develop the
proposed layout.
30% construction cost estimate.

In addition, the PDR will include the following
30% drawings:
Design criteria and equipment sizing.
Process flow diagram.
Overall site layout.
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Preliminary equipment and building layouts.
Civil site plan and preliminary yard piping plans for major utilities.
Electrical one line diagram.
Process and instrumentation diagrams.

Construction cost estimates will be prepared based
on quantity takeoffs, estimating guides, equipment
manufacturers’ quotes, and construction cost
estimates of similar facilities. Contingencies for general estimating, general conditions, contractor overhead
and profit, escalation to the midpoint of construction, and annual cost escalation will be included in the
construction cost estimate. The 30% cost estimate is
anticipated to be a Class 4 estimate as defined by the
Association for the Advancement of Cost Engineering
International, which has an expected accuracy of
between -30% and +50%.

Deliverables:
Draft and Final Preliminary Design Report (pdf).
Comment response log.
30% construction cost estimate.

Assumptions:
Digester 9 will be similar in size and configuration
to the existing Digester 8, but will include piping
modifications to be directly fed primary sludge and
thickened waste activated sludge.
Digester 8 facilities, including feed and transfer
piping, sludge heating, and sludge mixing, will not
need to be modified.
Primary sludge and thickened waste activated
sludge pumping systems will not need to
be modified.
The existing ferric chloride storage and feed pump
system will not need to be modified.
The existing hot water piping will not need to be
rehabilitated.

3.0 – DETAILED DESIGN

3.1 – Develop 50% Design
Carollo will provide a 50 percent design submittal,
which will include the following information:
Design criteria.
Process flow diagram.
Site plan.
Paving and grading and yard piping plans.
Structural plans and sections for the digester, control building, and major equipment pads.
Mechanical plans and sections for major equipment.
Electrical one-line diagram and electrical
equipment elevations.
Electrical site plans.
Process and instrumentation diagrams.
Draft specifications for major mechanical equipment
and equipment control descriptions.

Carollo will perform an internal quality control check of the 50% design deliverable in parallel with the City’s
review of the submittal.

Carollo will prepare a construction cost estimate
based on the 50% design drawings. Construction
cost estimates will be prepared based on quantity
takeoffs, estimating guides, equipment manufacturers’
quotes, and construction cost estimates of similar
facilities. Contingencies for general estimating, general conditions, contractor overhead and profit, escalation
to the midpoint of construction, and annual cost
escalation will be included in the construction cost
estimate. The 50% cost estimate is anticipated to be a
Class 3 estimate as defined by the Association for the
Advancement of Cost Engineering International, which
has an expected accuracy between -20% and +30%.

Carollo will prepare for and lead a 50% design review
workshop to present progress on the design and
discuss any feedback from the City. The workshop
will include travel for three team members to attend in person and other key project team members will attend
remotely as necessary.

In addition, Carollo will provide a response to all City review comments and shall provide the City with any
potential construction cost increase estimates and gain City approval of additional costs prior to performing
design modifications on that comment.

Deliverables:
50% design drawings (three hard copies at halfsize, 11x17). 50% design specifications (one hard copy).
50% construction cost estimate.
50% design review workshop agenda and minutes.
Comment response log.

Assumptions:
The City will review 50% deliverable and provide
any feedback to be incorporated within three weeks
of submittal.
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) The project will follow CSI MF95 format utilizing
Divisions 01 through 17.
The project will follow Carollo’s CAD standards.

3.2 – Develop 90% Design
Carollo shall provide a 90% design submittal, which
shall be a complete set of contract documents.

Additionally, the 90% deliverable shall have
incorporated applicable internal and City review
comments from the 50% design review. The 90%
deliverable shall include all draft specifications required for the project. The City’s front-end specifications
will be reviewed by Carollo’s risk management team
to suggest changes to mitigate risk during bidding
and construction. The front-end specifications
will be supplemented as necessary with Carollo’s
specifications to provide a complete bidding
package. The project team will update the front-end
specifications with project specific information.

Carollo will perform an internal quality control check of the 90% design deliverable in parallel with the City’s
review of the submittal.

Carollo will prepare a construction cost estimate
based on the 90% design drawings. Construction
cost estimates shall be prepared based on quantity
takeoffs, estimating guides, equipment manufacturers’
quotes, and construction cost estimates of similar
facilities. Contingencies for general estimating,
general conditions, contractor overhead and profit,
escalation to midpoint of construction, and annual cost escalation shall be included in the construction cost
estimates. The 90% cost estimate is anticipated to be a Class 2 estimate as defined by the Association for the
Advancement of Cost Engineering International, which
has an expected accuracy between -15% and +20%.

Carollo will prepare for and lead a 90% design review
workshop to present progress on the design and
discuss any feedback from the City. The workshop
will include travel for three team members to attend in person and other key project team members will attend
remotely as necessary.

Deliverables:
90% design drawings (three hard copies at halfsize, 11x17). 90% design specifications (three hard copies).
90% construction cost estimate.
90% design review workshop agenda and minutes.
Comment response log.

Assumptions:
The City will review 90% deliverable and provide
any feedback to be incorporated within three weeks
of submittal.
The project will not need to be approved by the
City’s Building Safety Division.
The City will provide its front-end specifications to be incorporated into the deliverable one month prior
to the project team submitting the 90% deliverable.

3.3 – Develop 100% Final Design Package
Carollo shall provide 100% design drawings and
specifications suitable for bidding. The bid set
deliverable shall have incorporated applicable internal and City review comments from the 90% design review.

Carollo will perform an internal quality control check of the 100% design deliverable prior to submitting to the
City. The 100% design deliverable will be stamped and
digitally signed by professional engineers registered in the state of California.

If no major project elements are added after the 90%
design deliverable, the 90% construction cost estimate
will serve as the engineer’s estimate for the basis of
bidding. It will be discussed at the 90% design review
workshop if there are review comments that warrant a
change in the design and update to the construction
cost estimate.

Deliverables:
100% design drawings (pdf).
100% design specifications (pdf).

4.0 – PERMITTING
Carollo will assist the City in obtaining the necessary permit approvals from regulatory agencies to construct
the digester and ancillary facilities. Carollo will respond to comments and make necessary revisions to design
documents as required by the regulatory agencies.

The anticipated permitting requirements include CEQA
and San Joaquin Valley Air Pollution Control District
approvals.

4.1 – CEQA Permitting
The construction of a new digester and ancillary
facilities is a project that is anticipated to trigger
compliance with the California Environmental
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Quality Act (CEQA). It is anticipated that the project
will apply for a Categorical Exemption. Carollo will
hire a subconsultant to develop and submit the
necessary applications.

Deliverables:
Draft and Final Categorical Exemption
application (pdf).

Assumptions:
The City will pay for any filing or processing fees
required for approval.

4.2 – SJVAPCD Permitting
The San Joaquin Air Pollution Control District
(SJVAPCD) will need to issue an Authority to Construct
for the digester improvements. Additionally, the new
boiler will require completion of a supplemental form,
Boilers, Steam Generators, Dryers, and Process
Heaters. The boiler will be permitted to run on natural gas or digester gas to provide flexibility in future
operations. Carollo will hire a subconsultant to develop and submit the necessary applications. The Authority to Construct will have to be finalized during construction, because it requires input from the contractor to provide the make, model, and serial number for the specific
unit that is to be installed at the site. Carollo and the subconsultant will develop a schedule with milestones
to progress the permitting process, so as to not be
on the critical path for substantial completion of the
construction project.

Deliverables:
Draft and Final Authority to Construct application
and supplemental boiler form (pdf).

Assumptions:
The City will pay for any filing or processing fees
required for approval.
The new boiler will be less than 5.0 MMBTU/hr.
The new digester can tie in to the current digester
gas pipeline network without any additional
permitting requirements of the existing gas
handling equipment.
The new boiler can tie in to the current hot water
loop without any additional permitting requirements
of the existing boilers.

5.0 – CONSTRUCTION

SUPPORT SERVICES

5.1 – Bid Support
The Consultant will attend one pre-bid meeting for the
prospective bidders on the City’s behalf.

During the bid period, Consultant will respond to
questions from prospective bidders and provide
written response. Verbal or written questions requiring clarification of the contract documents will be resolved by issuing addenda.

Deliverables:
Response to bidder questions and updated drawings
and specifications, as necessary.
Conformed drawings incorporating changes by
addenda following bidding (three hard copies of halfsize (11x17) drawings and specifications).

Assumptions:
The scope of work covers support for a single
bid period.
The Consultant will respond to 60 bidders' questions
and update 20 drawings and 10 specifications.
The City will complete the following tasks:
» Manage printing, advertising, and sale of contract
documents during the bid period.
» Issue bid packages to prospective bidders and
maintain bid tabs.
» Answer procedural questions from
prospective bidders.
» Compile and distribute addenda to
prospective bidders.
» Open and tabulate bids.
» Issue Notice of Award and Notice to Proceed to
successful bidders.
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF)

5.2 – Engineering Services During Construction
Consultant’s scope of work to provide engineering
services during construction (ESDCs) includes the
following activities:
Project management.
Preparation of conformed drawings.
Attending bi-weekly construction progress meetings
including site visits and observation by design
engineers to support construction work (25 online
and 25 in-person).
Response to requests for information (RFIs)
(up to 200).
Provision of design clarifications as needed
(up to 10).
Submittal review (up to 400).
Assistance in review of change orders (up to 10).
Start-up and training assistance.
Update Operations and Maintenance manual for the
new process.
Preparation of record drawings.

Deliverables:
Monthly invoices and associated progress
letter reports.
RFI responses.
Design clarifications, as needed.
Submittal and resubmittal review responses.
Change order request review comments.
O&M manual (three bound hard copies).
Record drawings (one hard copy, full size 22x34).

Assumptions:
ESDC will last for the duration of construction, which will be 24-months.
The City will contract with another firm to provide
construction management of the project.
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C. Staff Qualifications and
Related Experience
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The Right Team for Visalia
We believe that project staffing is a critical factor
in project success. The Carollo team, shown in the
organization chart below, brings the right mix of plant knowledge and technical expertise needed to deliver
the City a successful design project for Digester 9
and ancillary facilities.

Our project manager, John Witter, is based in our
Fresno office and brings nine years of wastewater
treatment experience. He will be the main point of
contact and will be responsible for the performance
of our team, client coordination, and overall project
success. Project engineer Katherine Bezek will
work closely with John, leveraging her solids
handling design experience to lead the day-to-day
activities to confirm the City receives high-quality
deliverables that meet scope and schedule. Principalin-charge Reace Fisher brings more than 16 years of experience working on wastewater treatment
and infrastructure projects throughout the valley. In
addition, Reace has hands-on experience working
with your team. John and Reace are familiar with
the City, having worked on your Water Reclamation
Facility Solids Handling Improvements design project.

To enhance our team, we have included the following
subconsultants: Westwood Professional Services
(surveying), BSK Associates (geotechnical), HELIX
Environmental Planning, Inc. (permitting/CEQA), and
Mizutani Environmental (permitting/air district).

Our team's experience is highlighted on the following
pages. They are committed to this project and will
not be substituted without prior written approval from
the City. Resumes that include education, credentials,
and related experience are provided in the Appendix.

Principal-in-Charge
Reace Fisher
Project Manager
John Witter
Technical Advisors
Digestion Process
Rashi Gupta
Structural
James Doering Project Engineer
Katherine Bezek
Discipline Leads
Mechanical
Structural
Electrical
Instrumentation
Civil
Surveying
Geotechnical
Permitting/CEQA
Permitting/Air District
– Darrell Buhman
– Jitesh Nalagotla
– Erik Bahneman
– Daniel Robinson
– Ryan Hook
– Scott Roberts1
– Neva Popenoe2
– Lesley Owning3
– Courtney Mizutani
4 86VIS0725po1.ai
SUBCONSULTANT:

1. Westwood Professional Services

2. BSK Associates

3. HELIX Environmental Planning, Inc.

4. Mizutani Environmental
Staff Qualifications
and Related Experience
Staff Qualifications and Experience
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Proposed Key Team Members
Reace has more than 16 years of experience working with wastewater treatment facilities throughout the Central Valley. He specializes in condition assessment for aging facilities and integration of new improvement projects to help support ongoing treatment facility success. He is familiar with the City's facilities, practices, and team, having served as the project manager for your Water Reclamation Facility Master Plan Update and Solids Handling Improvements design project. As principal-in-charge, Reace will oversee all project aspects, maintaining clear communication lines between the design team and City staff to continue our successful relationship.

Reace Fisher, PE

PRINCIPAL-IN-CHARGE
John has nine years of experience in wastewater treatment planning, design, and engineering services during construction. He has experience coordinating teams of discipline design engineers and CAD staff on a variety of wastewater treatment plant improvement projects, including the Visalia Solids Handling Improvements, King City WWTP Upgrade, and City of Fresno Sidestream Treatment projects. He has also played key roles in biosolids master planning, analyzing digestion processes and developing implementation plans for year-round biosolids management. This work has included biosolids master plans for the City of Fresno, Sacramento Area Sewer District, and Ironhouse Sanitary District. John is familiar with your facilities and procedures, having worked on your Water Reclamation Facility UV Spot Check Bioassay and UV Operations Plan, and most recently serving as project engineer and assistant project manager for the City's Water Reclamation Facility Solids Handling Improvements Design project.

John Witter, PE

PROJECT MANAGER
Katherine has nine years of experience with a focus on solids system evaluation and design. She has led digester capacity evaluations, digester layout alternatives studies, digester mixing alternatives analyses, and designs of new and rehabilitated tanks, and will work alongside your staff to efficiently design a system that meets your expectations. Katherine’s recent digester experience includes projects for Inland Empire Utilities Agency, Oro Loma Sanitary District, Union Sanitary District, and the City of Burlingame. As project engineer, Katherine will support John, and manage the internal day-to-day activities of Carollo’s design team and subconsultants.

Katherine Bezek, PE

PROJECT ENGINEER
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Proposed Key Team Members
Rashi has 23 years of experience and is Carollo’s National Solids Treatment Practice Lead. She is a national expert in all things related to solids—from sludge thickening and dewatering to digestion and biosolids management— and is very knowledgeable about the latest industry trends and solutions.

Rashi will lead optimization efforts, guide technical analyses, lead peer reviews, and participate in key meetings to produce a thorough and efficient design. Rashi’s recent digester experience includes projects for South San Francisco, Burlingame, and Union Sanitary District.

Rashi Gupta, PE
TECHNICAL ADVISOR – DIGESTION PROCESS
James serves as Carollo’s Chief Structural Engineer and has 31 years of structural design experience, including structural analysis and design, seismic retrofit, rehabilitation, review, and assessment for a variety of structures, such as wastewater and water treatment facilities, pump stations, reservoirs, tanks, clarifiers, large pipe supports, retaining walls, and operations and maintenance facilities. He served a key role as the lead designer to successfully deliver the City of Tulare J Street, Alpine, and Cartmill water storage tanks. In addition, he has worked on numerous projects involving wastewater digesters, including those for San Luis Obispo Los Osos Water Reclamation Facility, the cities of Santa Maria and Santa Barbara, and the Eastern Municipal Water District.

James Doering, PE, SE
TECHNICAL ADVISOR – STRUCTURAL
Discipline Leads
Jitesh Nalagotla, PE

STRUCTURAL
Darrell has 21 years of experience managing projects and implementing plant process heating systems, standby generators, cogeneration and digester gas conditioning systems, and RNG projects for wastewater treatment facilities. He has recently completed work on multiple digester heating system projects, including projects for Metro Water Recovery in Colorado, County of Hawaii Hilo, the City of Oxnard, and Oro Loma Sanitary District.

Darrell Buhman, PE

MECHANICAL
Jitesh has 27 years of experience in structural design of water, wastewater, industrial, and commercial projects. He oversees the structural design and evaluation of water and wastewater treatment infrastructure. Jitesh has extensive experience in seismic design of large new structures, as well as seismic evaluation and retrofit of existing structures. He was the lead structural engineer for the recent Solids Handling Improvements Design project. 299
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Discipline Leads
Daniel Robinson, PE

INSTRUMENTATION
Erik has 17 years of experience in the design of electrical, instrumentation, and control systems for water and wastewater projects, including switchgear, motor controls, instrumentation, and SCADA systems. He has coordinated electrical work with civil, structural, and mechanical work during both the design and construction phases on several multi-discipline projects. Recent digester work includes projects for the cities of Burlingame and South San Francisco. In the past five years, he has been involved in digester-related projects worth over $50 million in construction costs. Erik was the lead electrical engineer for the recent Solids Handling Improvements Design project.

Erik Bahneman, PE

ELECTRICAL
Daniel brings 25 years of I&C experience in the water/wastewater industry, including 480VAC electrical distribution systems, variable frequency drives, reduced voltage soft starters, full-voltage motor control design, PLC and control panel design, and process instrumentation. His recent digester work includes the solids improvements for Clean Water Services in Oregon. Daniel was the lead instrumentation engineer for the recent Solids Handling Improvements Design project.

Ryan has 23 years of civil engineering experience. He has served as construction manager, lead inspector, design engineer, project engineer, and civil engineer. Ryan's expertise includes planning, analysis, design, and construction of wastewater treatment facilities, wastewater pump stations and pipelines, as well as preparation and review of plans and specifications.

Ryan was the lead civil engineer for the recent Solids Handling Improvements Design project.

Ryan Hook, PE
CIVIL
Subconsultants
Scott has more than 15 years of land surveying experience, including direct work with the Carollo team and surveying support for digester and sewer facility projects across Central California. Scott has a strong background in public infrastructure projects and is highly proficient in AutoCAD Civil 3D, Trimble GNSS & Robotic Total Stations, Trimble Business Center, Trimble RealWorks, and Terrestrial LiDAR. His responsibilities span project management, topographic and boundary surveys, utility locating, construction staking, elevation certification, laser scanning, legal descriptions, and GIS mapping.

Scott Roberts, PLS
Westwood Professional Services

SURVEYING
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Subconsultants
Neva has over 20 years of geotechnical engineering and materials testing experience. She manages geotechnical investigations, including developing the scope and budget, field classification of soils, sampling, design, and report preparation and review. Her design experience includes retaining walls, sound walls, roadway embankments, recycled water and surface water facilities, and pavement structural sections. She also performs field inspection and testing, data analysis, laboratory testing, and construction special inspections.

Neva Popenoe
BSK Associates

GEOTECHNICAL
Lesley is a principal planner with 13 years of experience in providing CEQA compliance. Lesley is skilled at developing CEQA compliance approaches that streamline the environmental review process for complex projects involving numerous agencies. She has prepared CEQA documentation for a wide range of project types including water/wastewater; institutional facilities; land development, transportation; parks and recreation; and renewable energy.

Lesley Owning
HELIX Environmental Planning, Inc.

PERMITTING/CEQA
Courtney has over 35 years of experience specializing in air permitting for municipal water reclamation facilities. Courtney has successfully permitted scores of new sources, as well as followed evolving air regulations at the local and state level as they relate to municipal facilities. She takes a collaborative approach to working with facility staff and the regulators, seeking to streamline the permit process wherever possible.

Courtney Mizutani, PE
Mizutani Environmental

PERMITTING/AIR DISTRICT
Subconsultants Help Meet all Project Requirements
Westwood
Professional Services
Established in 1972, Westwood
is a full service, multi-discipline
professional engineering firm. They
have developed land surveying
expertise, conducting thousands
of surveys each year. Westwood
has supported over 60 projects
in Tulare County, including work
directly for the City of Visalia. For
the City, they have successfully
contributed to key projects such as
Oak Street Improvements, Bridging
Horizons Inclusive Park, and
Riverway Sports Park.

BSK Associates
Founded in 1966, BSK
Associates offers geotechnical
and environmental consulting,
construction observation,
materials testing, special
inspections, and analytical
laboratory services. They
have offices and laboratories
throughout California; their
Fresno, Bakersfield, Livermore,
and Rancho Cordova
offices feature Caltrans and
AASHTO accredited soils and
materials laboratories.

HELIX Environmental
Planning, Inc.

Since 1991, HELIX has been
helping clients comply with
federal, state, and local
environmental laws and
regulations; investigate natural
and cultural resources; and
design and construct sustainable
projects. In-house services include
CEQA and NEPA compliance;
regulatory permitting; biological
studies, cultural resource studies,
landscape architecture, and air
quality/greenhouse gas and
noise studies.

Mizutani Environmental
Mizutani Environmental has
been providing air permitting
services to municipal clients
across California since 1995.

They work to support municipal
clients in all areas related to air
regulatory compliance and in all
stages of project development.

They have a proven track record
for successfully permitting
new projects, and resolving air
regulatory concerns.
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Related Experience
Client – ProjectAlternatives AnalysisDigester Feed and PumpingDigester MixingDigester Heating/Boiler DesignDigester Design/Rehabilitation City of Burlingame, CA / Digester Improvements Project      Inland Empire Utilities Agency, CA / RP-1 Solids Thickening Project      City of South San Francisco / Digester Improvements Project      City of Visalia, CA / Digester 6, Digesters 1-4 Mixing Modifications      City of Fresno, CA / Organics Upgrades I, II, III and Digester Gas Storage and Cover Rehabilitation      Dublin San Ramon Services District, CA / Anaerobic Digester No. 4 and FOG Receiving Facility      Union Sanitary District, CA / Digester Nos. 2 and 3 Rehabilitations; Digester 8 Feasibility Study      City of Reno, NV / TMWRF Expansion Project     
Eastern Municipal Water District, CA / Moreno Valley APAD Expansion      Eastern Municipal Water District, CA / Perris Valley RWRF Plant 3 Facilities Expansion      Eastern Municipal Water District, CA / San Jacinto Valley RWRF Plant 2 Facilities Expansion      Eastern Municipal Water District, CA / Temecula Valley RWRF 12-, 16-, 18-mgd Expansions     

REPRESENTATIVE DIGESTER EXPERIENCE
Digester evaluations
or studies in
the past 10 years
175+
Municipal clients in
the past 10 years
65+
Digester
rehabilitations in
the past 10 years
155+
Digester diameters
size range
30’-125’

CAROLLO DIGESTERS BY THE NUMBERS
Firm Background and History
Carollo is a national, full-service environmental
engineering firm that has exclusively served the water
and wastewater industries for more than 92 years.

We remain responsive to the needs of our clients
as the industry leader in the planning, permitting,
design, construction, and operations of facilities and
infrastructure that reliably convey and treat water
across the U.S.

Carollo’s reputation is based upon client service and a continual commitment to quality. We currently maintain
50+ offices in North America with staff numbers
exceeding 1,600 employees, including more than 850
registered engineers. We recruit nationwide and hire
technical staff who have extensive background and
training specific to this field.

Digester Experience
Carollo has extensive experience with evaluation and
design of anaerobic digestion facilities and ancillary
systems. Our digester evaluations have included space
planning and capacity sizing analysis to optimize layout within existing and new treatment facilities.

Over the years, we have remained abreast of the
latest innovations, including technologies, heating
systems, piping configurations, and automation to help
clients improve digestion and to comply with current
regulations and design standards. The table below lists Carollo's relevant project experience that share similar scope elements as your design project for Digester 9 at the City’s Water Reclamation Facility. See the following pages for additional details on the bolded projects.
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Digester Improvements Project
Burlingame, California
The project included evaluating the condition of existing assets and rehabilitating and expanding the digestion system. Evaluation phase included flow and load projections, digester sizing, cover and mixing type investigation, and layout planning in a constrained site.

Carollo then designed the rehabilitation of two digesters, including cover retrofit, concrete and coating repairs, and mixing and heating system improvements. The design also included a new digester with a concrete cover, pump mixing system with surface foam suppression control, and new heat exchangers, sludge recirculation and transfer pumps, and heating loop housed in a new digester control building.

Carollo is currently assisting the City with securing funding through an SRF loan, and the project is anticipated to bid in Q4 of 2025.

Relevance to Visalia:
Provisions in design to allow new digester to be fed directly or as the second digester in series.
Digesters designed with pump mixing systems with foam suppression.

DESCRIPTION
Evaluation/condition assessment, design, funding
assistance

PLANT CAPACITY

4.4 mgd

NAME OF OWNER
City of Burlingame, CA

OWNER'S CONTACT
Mahesh Yedluri, Senior Civil Engineer
650-558-7230
[email protected]

FIRM'S INVOLVEMENT
Prime
Services: condition assessment, design,
funding assistance
PROPOSED COST VS. ACTUAL COST
Engineer’s Estimate: $23M
Low Bid: TBD

STATUS OF COMPLETION
95% Design: 2023
Final Design and Bid: 2025 (anticipated)
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF)

DESCRIPTION
Designed solids system expansion, detailed
construction sequencing, construction services

PLANT CAPACITY
60 mgd

NAME OF OWNER
Inland Empire Utilities Agency, CA

OWNER'S CONTACT
James Spears, Principal Engineer
909-993-1851
[email protected]

FIRM'S INVOLVEMENT
Prime
Services: design, construction services
PROPOSED COST VS. ACTUAL COST
Engineer’s Estimate: $161M
Low Bid: $148M

STATUS OF COMPLETION
Design Completed: 2024
Construction: Ongoing
RP-1 Liquid and Solids Capacity Recovery/
Solids Thickening
Ontario, California
Carollo designed a solids system expansion to increase capacity from 40 to 60 mgd. Carollo evaluated thickening improvements, six digester mixing technologies to provide the most cost-effective mixing that meets O&M needs, and heat exchanger types to provide the required capacity and address concerns about vivianite buildup.

Carollo also investigated digester heating system capacity and performed an alternatives analysis on three types of boilers and three site location options to determine a long-term plan for digester heating needs.

The project included three new acid-phase digesters, heating system retrofits to an existing methane digester, a new boiler, and a new thickening facility with options to co-thicken or separately thicken primary and secondary sludges in nine new rotary drum thickeners.

The project also included detailed construction sequencing and tie-ins to enable smooth process integration into the existing digester gas, digester feed, and digested sludge transfer systems. Decisions regarding the sequencing, system controls, and technologies were made in close collaboration with the Agency’s staff to see that O&M concerns were met and that all of the plant’s treatment processes would be uninterrupted during construction. Carollo is now providing construction services for the project.

Relevance to Visalia:
Design of new digesters and rehabilitation of existing digester. Digester heating system and boiler design, with integration into existing heat loop.
Digester mixing and heat exchanger evaluations and designs. Incorporation of O&M staff input into sequencing, design, and technology selections.
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) Water Quality Control Plant Wet Weather
and Digester Improvements
South San Francisco, California
Carollo’s digestion work on this project began with a structural condition assessment and preliminary design, and an evaluation of digester mixing, roof, and heating system options. The assessment showed that replacement of two existing digesters with new digesters was necessary while a third existing digester could be rehabilitated to meet seismic requirements.

The evaluation included capital and life-cycle cost analyses, noneconomic parameters important to the City, reference checks, and site visits. Our subsequent cost-based evaluations led the City to change their original design intent.

The final project included replacement of two existing digesters with one new high solids digester with Anaergia’s submersible mixers, and rehabilitation of a third existing digester to meet seismic requirements and improve system reliability. An Ovivo LM mixer was provided for the retrofitted digester. The digester heating system modifications included replacement of an existing, corroded boiler and retrofits to heating system piping and valves to create a true primary/secondary heat loop configuration and improve heating system control.

Relevance to Visalia:
Digester process evaluation, preliminary design, final design, and services during construction.
Digester mixing technology evaluation.
Expansion of existing digester heat loop including new boiler, hot water loop piping, and sludge heat exchangers.

DESCRIPTION
Condition assessment, preliminary and final
design, digester evaluation

PLANT CAPACITY
13 mgd

NAME OF OWNER
City of South San Francisco, CA

OWNER'S CONTACT
Brian Schumacker, Plant Superintendent
650-877-8555
[email protected]

FIRM'S INVOLVEMENT
Prime
Services: condition assessment,
evaluation, expansion
PROPOSED COST VS. ACTUAL COST
Engineer’s Estimate: $45M
Low Bid: $49M

STATUS OF COMPLETION
Completed 2023
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D. Proposed Fee Structure
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) DProposed Fee Structure
Carollo’s proposed fee structure is provided in a separate, sealed envelope, as requested in the RFP.
307
E. Conflict of Interest
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CITY OF VISALIA / PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY (WRF) EConflict of Interest
Carollo is familiar with applicable conflict of interest laws and requirements.

Neither our firm nor any of its employees involved on this project are aware of any conflict of interest that would preclude working on this project. Carollo, at all times, conducts its professional and business activities in a manner to prohibit conflict of interest on the part of the firm and its employees. We foresee no circumstances in which a conflict could arise.
309
Appendix
310
Addendum
Acknowledgment
311
Design Digester 9 RFP-24-25-07
Addendum #1 Page 1 of 2
City of Visalia Purchasing Division
707 W. Acequia Avenue
Visalia, CA 93291 (559)713-4334
[email protected]

CITY OF VISALIA, CA

REQUEST FOR PROPOSALS
RFP-24-25-07
PROFESSIONAL SERVICES TO DESIGN DIGESTER 9
ADDENDUM NO. 1
Issued: July 10, 2025
Submittals Due: Thursday, July 31, 2025, at 3:00pm
Addendum No. 1 is being issued to extend the deadline for submitting proposals in response to this RFP and provide responses to questions that have been received. This addendum must be signed and submitted with bid.

ITEM 1: EXTENSION OF DEADLINE FOR SUBMITTING PROPOSALS
The deadline for submitting proposals in response to this Request for Proposals has been extended.

Proposals are due no later than:

Thursday, July 31, 2025 at 3:00pm
ITEM 2: QUESTIONS/RESPONSES
Q. 1 Is there any flexibility on the design schedule? It will be very difficult to have all work completed by 6/1/26.

Response: The design completion date shall be changed to November 1, 2026.

Q. 2 In the RFP there is a document referenced and we would like to know if the city can provide that document, this document is the “TM 4 of Carollo’s Facility Plan” Response: Please see Attachment 1 of this Addendum.

Q.3 Can the deadline be extended for two weeks?
Response: See above
Q.4 Can the Digester 8 civil drawings be available for review:? Response: Please see Attachment 2a, 2b, and 2c of this Addendum 312
Design Digester 9 RFP-24-25-07
Addendum #1 Page 2 of 2
ITEM 3: PROPOSER CONFERENCE ATTENDANCE SHEETS
The sign-in sheets from the two mandatory proposer conferences have been included with this Addendum as Attachment 3
Attachments:

Attachment 1 - TM4 Plans
Attachment 2a - Digester 8 Plans
Attachment 2b - Digester 8 Yard Piping 1
Attachment 2c - Digester 8 Yard Piping 2
Attachment 3 - Mandatory Proposer Conference Sign-In Sheets END OF ADDENDUM NO. 1
/s/ Purchasing Division
(559) 713-4334
RESPONDENT to sign and submit with PROPOSAL
Firm: Date:

By:

Bidder’s Signature
Carollo Engineers, Inc. July 11, 2025
313
Resumes
314

EDUCATION
MS Environmental
Engineering, University of
Illinois, 2015
BS Civil Engineering,
University of Illinois, 2014

LICENSES
Civil Engineer, California

PROFESSIONAL

AFFILIATIONS
California Water
Environment Association,
Central San Joaquin
Section, Student and
Young Professionals
Chair
John R. Witter, PE
John Witter has nine years of experience and is a professional engineer who specializes in wastewater treatment plant planning, design, and engineering services during construction. His experience ranges from detailed analyses developing robust process solutions to managing design teams delivering detailed drawings and specifications for a variety of wastewater treatment and solids handling processes.

RELEVANT EXPERIENCE
> Project engineer for the City of
Visalia, California, Water Reclamation
Facility Solids Handling Improvements
Design. The project included completing
predesign and final design to address
solids handling capacity issues and
improve performance, while providing
better access for long-term
maintenance. This project will result in
increased capacity and performance of
solids handling processes, including
improved thickening performance
resulting in increased digester capacity,
increased dewatering capacity, increased
sludge drying capacity, and improved
maintenance flexibility for thickening
conveyance and digestion.
> Project manager for the City of
Fresno, California, North Fresno Water
Reclamation Facility (NFWRF)
Expansion Feasibility Study. The NFWRF
treats wastewater from a residential
development to recycled water quality
standards and discharges off-spec
effluent and waste sludge to the
Regional Wastewater Reclamation
Facility. John oversaw a team of
engineers to analyze historical data,
perform a condition assessment, and
evaluate alternative treatment
technologies to identify treatment plant
upgrades to expand capacity to satisfy
growth within the service area.
> Project engineer for Sacramento
Area Sewer District (SacSewer),
formerly Regional San, California,
Biosolids Management Plan. The
project included solids flows and loads
analysis, alternatives screening, and
financial and non-financial evaluation
for digestion, dewatering, and biosolids
recycling alternatives.
> Project engineer for the Ironhouse
Sanitary District, California, Biosolids
Master Plan. The project included
evaluating solids projections, regulatory
review, land application vulnerability
analysis, and biosolids technology and
management alternatives analysis.
> Design manager for the City of King
City, California, Wastewater Treatment
Plant Upgrade Project. The project
consists of designing an upgrade from
the 1.3-mgd pond treatment plant to a

1.7-mgd treatment facility that includes
a new headworks, grit removal,
oxidation ditches, secondary clarifiers,
return activated sludge/waste activated
sludge pump station, solids dewatering,
and equalization basin. The land
disposal system was updated to provide
new spray fields and percolation ponds.

A new access road to the site was also
required to allow 365 days/year access.

Carollo assisted with funding
applications, permitting, and design
services.
> Staff engineer for the City of Fresno,
California, RWRF Biosolids Master Plan.

The City has historically produced Class
B biosolids through mesophilic
anaerobic digestion and hauled
biosolids offsite to composting facilities
or land-application sites. The City was
interested in evaluating various solids
handling processes and biosolids enduse alternatives. John analyzed historical data to project solids flows and loads
then determined the capacity and
performance of current and future solids
handling processes. John evaluated
315
John R. Witter, PE
biosolids alternatives and presented
process overview, capital and O&M
costs, non-financial and sensitivity
analysis, and an implementation plan for
the recommended alternative to project
stakeholders.
> Staff engineer for the City of Visalia,
California, Water Reclamation Facility
UV Spot-Check Bioassay project. Set up
the dosing and injection testing system
on an 18-mgd capacity UV system. Took
samples at various testing conditions for
laboratory analysis to determine
matching UV system performance with
field conditions.
> Staff engineer for the City of Visalia,
California, UV Operations Plan.

Responsible for developing Title 22
reports and Notice of Intent under the
General Order for the use of disinfected
tertiary recycled water. Developed the
UV Operations Plan, which included
system overview, operational
configurations, dosing control strategy,
and alarm set points that were used as
the basis to test the system for
compliance.
> Project engineer for the City of
Fresno RWRF Waste Gas Flare Design
project. The City combusts digester gas
through an enclosed waste gas flare as
an emissions control measure. The San
Joaquin Valley Air Pollution Control
District adopted stricter nitrous oxide
(NOx) emissions for waste gas flares,
necessitating upgrades for the RWRF.

John was responsible for establishing
design criteria to size new infrastructure,
coordinate with flare vendors to ensure
installed technology met new
regulations, and managed the design
disciplines to implement a coordinated
design. John worked with the City
Planning and Development Department
to receive the necessary approvals and
permits to progress the project into
construction. He provided bidding and
construction support, responding to
addenda, and reviewing and
coordinating responses for RFIs and
submittals. He attends recurring
construction progress meetings to
ensure construction moves forward as
smoothly as possible in a timely manner.
> Design manager for the City of
Fresno, California, Regional
Wastewater Reclamation Facility
Deammonification Sidestream
Treatment Design. Developed a pilot
work plan and provided oversight and
coordination between the City and
Veolia for the successful operation of a
five month long ANITA™ Mox pilot. Led
the coordination of project team
members for the design of a 1.6 mgd
ANITA™ Mox sidestream treatment
facility. Conducted detailed design of
filtrate and wash water piping
modifications, sidestream equalization
basins, deammonification reactors,
chemical feed facility, and support
building. Evaluated struvite precipitation
potential and incorporated struvite
mitigation design features. Led value
engineering efforts to reduce the
estimated construction costs by over
30%. Coordinated with City and Veolia
staff to develop sole source justification
and pre-procurement documents for the
ANITA™ Mox package.
> Operator for the City of Delano,
California, Paradise Colony Fixed-Bed
(FXB) Biological Nitrate Treatment Pilot
Project. Responsible for mobilization
and demobilization, daily operations
and maintenance, and equipment and
process troubleshooting, sampling, and
data analysis. The project tested the
lower bound of operational limits of the
FXB system with intermittent, ondemand operation.
316

EDUCATION
BS Civil Engineering,
California State
University, Fresno, 2009

LICENSES
Civil Engineer, California

CERTIFICATION
Certificate, Pipeline
Assessment Certification
Program, NASSCO,
California, 2016

PROFESSIONAL

AFFILIATIONS
California Water
Environment Association,
Central San Joaquin
Section (Officer)
Reace P. Fisher, PE
Reace Fisher has over 16 years of experience in wastewater design, pump station design, wastewater collection system design, wastewater treatment facilities planning, recycled water master planning, and infrastructure master planning.

RELEVANT EXPERIENCE
> Project manager for the City of
Visalia, California, Water Reclamation
Facility Solids Handling Improvements
Design. The project included completing
predesign and final design to address
solids handling capacity issues and
improve performance, while providing
better access for long-term
maintenance. This project will result in
increased capacity and performance of
solids handling processes, including
improved thickening performance
resulting in increased digester capacity,
increased dewatering capacity, increased
sludge drying capacity, and improved
maintenance flexibility for thickening
conveyance and digestion.
> Engineer for the Sacramento
Regional County Sanitation District,
California, EchoWater Project Nitrifying
Sidestream Treatment Project. The
project involved design of a 4.26-mgd
nitrifying sequencing batch reactor
facility to treat supernatant from
anaerobically digested sludge. The
ammonia-laden effluent is used to
provide odor control for large
interceptors that feed the facility.
> Project manager for the City of
Visalia, California, WRF Facility Plan
and Master Plan Update. The project
included completing a facility plan to
address near-term facility improvements
required to maintain capacity and
condition of the plant. In addition,
process modeling was performed to
plan for future capital improvement
projects necessary to maintain growth in
the City and allow for additional
industrial users. This project resulted in
the discovery of critical solids handling
improvements that were causing
problems in the solids process.
> Project engineer for the City of
Modesto, California, West Trunk
Rehabilitation. Carollo evaluated the
best rehabilitation method for the City’s
54‑ to 60-inch West, 45‑inch Lakewood,
30-inch Santa Rosa, and 18-inch
Emerald trunk sewers, as well as the
60‑inch pressure Sutter outfall. All
sewers dealt with corrosion associated
with a hydrogen sulfide attack. The
project involves design of the selected
rehabilitation alternative for each sewer.

Project components include hydraulic
modeling to determine capacity impacts
of cured-in-place pipe (CIPP) vs
sliplining, CIPP lining of 15,730 feet of
18- to 60-inch trunk sewers, close
coordination with EJ Gallo to prevent
operational issues on Santa Rosa
Avenue, and development of unique
bypass pumping plans for in-plant
rehabilitation and rehab of pressure
facilities.
> Project engineer for Digester
Condition Assessment at the City of
Fresno, California, Fresno-Clovis
Regional Wastewater Reclamation
Facility. The project included planning,
design, and construction for two of
Fresno’s older digesters. Along with
structural support, digesters were
inspected externally and internally for
structural repairs and operational
improvements. Responsible for
preparation of rehab design drawings
and specifications, project management.
> Project engineer for design of a
dump station for collection system
cleaning trucks at the City of Fresno,
California, Fresno-Clovis Regional
317
Reace P. Fisher, PE
Wastewater Reclamation Facility.

Performed analysis on the existing site
and a problematic area that was deleted
in a pipeline project within the
wastewater treatment facility. Developed
a unique, improved design that solves
the problems of time consumption for
operators and harmful debris entering
the treatment system.
> Project engineer for design of
reclamation wells at the City of Fresno,
California, Fresno-Clovis Regional
Wastewater Reclamation Facility.

Worked with a consultant to perform
analysis on existing core samples, and
developed an improved well design to
eliminate infiltration to the groundwater
table. Worked with the contractor and
well specialist to confirm proper well
construction.
> Project engineer for design of
catwalk structures at the City of Fresno,
California, Fresno-Clovis Regional
Wastewater Reclamation Facility. The
project involved design of multiple
catwalk structures to resolve a safety
hazard around the power generation
facility. Performed a preliminary analysis,
investigated possible retrofit areas,
provided design of safety platforms to
solve existing problems, and assisted
with structural calculations to adapt the
existing structure.
> Project engineer for the 600-hp raw
sewage pump at the City of Fresno,
California, Fresno-Clovis Regional
Wastewater Reclamation Facility.

Responsible for project management
and technical services for interpretation
of plans and specifications for technical
plant support, planning and
coordination between the contractor
and wastewater staff, and analysis of
pump data from factory and site testing.
> Project engineer for Digester
Condition Assessment at the City of
Porterville, California. The project
included planning, inspections, design,
and construction for two of Porterville’s
four digesters. Along with structural
support, digesters were inspected
externally and internally for structural
repairs and operational improvements.

Both digesters had failed due to
overloaded gas system and issues with
the flare. This resulted in the floating
dome of the digesters to fail. Digesters
were blasted, cleaned, and rehabilitated
with an updated design for the dome
and gas capture system. Responsible for
preparation of rehab design drawings
and specifications, project management.
> Pump station design lead for the
City of Paso Robles, California,
Recycled Water Distribution System
Design. The project involved preliminary
design confirmation, final design, and
bidding services. The system included
approximately 49,000 feet of pipeline
ranging in diameter from 6 inches to 24
inches, 1-MG storage tank, and pump
station.
> Engineer for the Sacramento
Regional County Sanitation District,
California, EchoWater Project Flow
Equalization Project (FEQ). The $130
million FEQ will provide an additional
110 MG of storage capacity for the
facility. Additional features include
roller-compacted concrete lined basins,
spillways and interconnections
structures, 84-inch-diameter final
effluent distribution pipeline, underdrain
pump station, and basin wash-down
system. The wash-down system consists
of manual and automated water
cannons for efficient wash-down of the
over 60 acres of basin area. The pump
station includes four vertical turbine
pumps with a capacity of 8,000 gpm.
318

EDUCATION
MS Environmental
Engineering, University of
California, Berkeley, 2016
BS Chemical Engineering,
Massachusetts Institute
of Technology, 2012

LICENSES
Civil Engineer, California

PROFESSIONAL

AFFILIATIONS
California Water
Environment Association
Water Environment
Federation
- Member, Residuals
and Biosolids
Committee
- Member, Solids
Separation
Subcommittee
Katherine J. Bezek, PE
Katherine Bezek, a design engineer with Carollo Engineers, has nine9 years of experience in wastewater treatment projects across the entire implementation cycle - master planning, design, and engineering services during construction. Her primary area of focus is in biosolids management including evaluation and design of solids thickening and digestion facilities and their related support systems. Her experience includes:

RELEVANT EXPERIENCE
> Solids area design lead for the
Inland Empire Utilities Agency (IEUA),
California, RP-1 Liquids and Solids
Capacity Recovery/Solids Thickening
Project. The project included the
preliminary and final designs to recover
solids handling capacity to 61 mgd from
the current 42 mgd with three new acidphase digesters, a new thickening facility with 9 RDTs, and rehabilitation and/or
expansion of various existing unit
processes including DAFTs, the boiler
facility, and methane phase-digesters.

Preliminary design responsibilities
included leading the evaluation of
replacing existing digester mixing
systems, alternatives analysis for new
digester mixing and heating systems,
and projection of digester heating
requirements and boiler capacity. Final
design responsibilities included leading
the design of a new thickening facility,
new acid phase digesters, and existing
DAFT rehabilitation.
> Project engineer for Union Sanitary
District’s (USD), California, Primary
Digester No. 8 Feasibility Study. This
project evaluated the feasibility of
constructing a new Primary Digester No.
8 in the area currently occupied by
Primary Digesters No. 1 through 3 or in
the area adjacent to Primary Digester
No. 7. For each location alternative,
conceptual layout of the new digester
and planning level process flow
diagrams, existing facilities requiring
relocation, construction sequencing
steps, construction cost, and
implementation schedule were provided
to help to District evaluate their
advantages and considerations.

Responsibilities include process data
analysis, development of sequencing
plans and schedules, and alternatives
analysis.
> Project engineer for the City of
Burlingame, California, Digester
Equipment Building and Digester No. 2
Project Preliminary Design. The project
includes design of a new digester with
pump mixing, a new digester with pump
mixing, and a new digester equipment
building to house new sludge
recirculation and heating systems and a
new electrical room. Responsibilities
included leading the preliminary design
phase including equipment sizing, site
and building layout, and cost estimating.
> Project engineer for the Ora Loma
Sanitary District Digester Rehabilitation
Project. This ongoing project began
with an alternatives evaluation which
resulted in a two-phase design project.

The first phase, which is currently in
design, includes a new thickening facility
to improve sludge thickness and, thus,
digester capacity and a new dual
membrane gas storage system mounted
at grade. The second phase will include
a new digester and a redundant gas
storage system. Responsibilities have
included process data evaluation and
projections, alternatives analysis, cost
estimating, and design of new
thickening and gas storage facilities.
319
Katherine J. Bezek, PE
> Project engineer for the Union
Sanitary District, California, WAS
Thickener Replacement Project at the
Alvarado Wastewater Treatment Plant
in Union City, California. The project
includes evaluation of thickening
technologies, and preliminary and final
design for a retrofitted thickening
facility with new polymer, thickened
sludge conveyance, HVAC, electrical and
other ancillary systems. Responsibilities
include alternatives analysis and
facilitation of technology selection,
equipment sizing, building layout, and
cost estimating.
> Project engineer for the City of
Manteca, California, Sludge Thickener
& Dewatering Unit No. 3 Preliminary
Design. This project includes the design
of a new RDT co-thickening facility for
PS and WAS, conversion of existing
DAFT tanks to sludge blending tanks,
and addition of a third dewatering
centrifuge to an existing facility.

Responsibilities included leading the
preliminary design phase including
process data evaluation and projections,
thickening technology alternatives
analysis, site and building layout, and
cost estimating.
> Design engineer for the City of
Fargo, North Dakota, Final Design
Improvements Project Phase IIB. The
project involved final design of solids
treatment upgrades including a new
primary digester, a new thickening
facility, updates to the existing digester
facility, conversion of digester gas
flaring to recovery using compressed
natural gas, and conversion of an
existing tank to a centrate equalization
tank. Responsibilities included leading
the design of the new solids thickening
facility with three thickening centrifuges
and their ancillary systems.
> Design engineer for Treasure Island
Wastewater Treatment Plant and
Recycled Water Facility Project for the
San Francisco Public Utilities
Commission (SFPUC), California.

Responsibilities included the conceptual
design of new solids storage, thickening,
and truck loading facilities for this
greenfield plant. The conceptual design
documents have been used by a
design/build team for delivery for the
final constructed facility.
> Staff engineer for the Union
Sanitary District, California, Alvarado
Wastewater Treatment Plant Solids
System/Capacity Assessment. The
plant’s influent flows have been steadily
decreasing while influent TSS and BOD
mass loading rates have been
increasing. This project involved an
assessment of existing capacity and
ways to increase solids treatment
capacity, optimize solids processes,
achieve energy neutrality, and produce
Class A biosolids. An evaluation of
potential regulatory changes was also
included. Responsibilities included
development of a framework to assess
the feasibility of energy neutral plant
operations, hydraulic modeling for
alternatives assessments, and cost
estimating.
> Design engineer for the Primary
Digester No. 3 Rehabilitation Project
for the Union Sanitary District, Union
City, California. The project included the
evaluation and proceeding
recommendations for rehabilitation and
repair of an existing digester.

Responsibilities included assisting with
drawing and specification development
and engineering services during
construction.
320

EDUCATION
MS Environmental and
Water Resources
Engineering, University of
Texas, Austin, 2001
BS Civil and
Environmental
Engineering, University of
California, Davis, 1999

LICENSES
Civil Engineer, California
Professional Engineer,
Kentucky

PROFESSIONAL

AFFILIATIONS
California Water
Environment Association
(CWEA)
Santa Ana River Basin
Section of CWEA
(SARBS):

Past-President, Board
of Directors
Southern California
Alliance of Publicly
Owned Treatment Works
Water Environment
Federation
Incoming Vice-Chair,
Residuals and Biosolids
Committee
Past Chair, Solids
Separation SubCommittee
Member, Bioenergy
Sub-Committee
Rashi Gupta, PE
Rashi Gupta, a vice president and project manager with Carollo Engineers, has 23 years of experience in delivering sustainable solutions for biosolids management and wastewater treatment throughout her career. Rashi is Carollo’s Wastewater Practice Director, which allows her to remain current on leading wastewater technologies including changes within the biosolids management field.

Her responsibilities as project manager and process specialist on solids-related projects across the country have taken her from the initial planning phase through design to start-up after construction. She also leads applied research projects for solids processes to assess the best ways to integrate innovation into facilities. From this experience, Rashi has become a national expert in all things related to solids – from thickening and dewatering to digestion and subsequent practices to beneficially use biogas and biosolids.

RELEVANT EXPEIRENCE
> Process specialist for the City of
Burlingame, California, Digester
Equipment Building and Digester No. 2
Predesign Project. This project included
evaluation of replacing two existing
digesters with a new digester and a new
sludge storage tank. Sizing of the new
digester and sludge storage tank was
based on a review of the plant’s past 5
years of process data to estimate
effective volume needed to a design
capacity of 4 mgd. Various site layouts
were then developed to fit the new
digesters and an associated digester
equipment building around another
digester and gravity thickener. The
preliminary design includes a new 55-ft
diameter digester, rehabilitation of an
existing pump mixing systems for both
digesters, and a new digester equipment
building to house new sludge
recirculation and heating systems and a
new electrical room. Rashi is leading the
design effort.
> Project engineer for the
Improvements to Anaerobic Digesters
Nos. 1-3, Omnivore Cost Evaluation
study, and final design at the City of
South San Francisco, California, Water
Quality Control Plant. The original
project included the replacement of two
existing digesters with new digesters
and rehabilitation of a third existing
digester to meet seismic requirements
and improve system reliability. The
preliminary design phase of this project
included an evaluation of digester
mixing technologies, digester roof, and
heating system options as well as
finalization of the required rehabilitation
necessary for the single digester being
upgraded. Rashi conducted the
evaluation and developed the
subsequent report for the City. The final
project includes design for the
replacement of two existing digesters
with one new high solids ("Omnivore")
digester and rehabilitation of a third
existing digester to meet seismic
requirements and improve system
reliability. Replacement of existing
mixing system with a linear motion
mixer was provided for the retrofitted
digester. Modifications to the digester
heating and sludge transfer systems are
also included as part of overall system
improvements. She is responsible for the
final design of the Omnivore and
conventional digestion system at the
plant.
> Project manager for the City of
Oxnard, California, Evaluation of
Anaerobic Digester Nos. 1 and 3
Improvements project. This project
includes evaluation of 9 types of
321
Rashi Gupta, PE
AWARDS
Induction into Select
Society of Sanitary Sludge
Shovelers (5S) by the
California Water
Environment Association
Spotlight Volunteer
Award from the Santa
Ana River Basin Section
of CWEA
digester mixing alternatives, assessment
of digester heating needs and required
modifications, evaluation of different
heat exchangers, and development of
operational improvements to optimize
the digestion system.
> Subject matter expert/solids system
lead for the WIFIA-funded RP-1 Liquid
and Solids Capacity Recovery Project
for the Inland Empire Utilities Agency
in Chino, California. Her responsibilities
include oversight of the preliminary and
final design of the multi-phase digestion
system and new solids thickening
facilities that will provide solids
treatment capacity for the equivalent of
60-mgd influent flow to the plant.

Preliminary design included evaluation
of various digester mixing and heating
systems, and final design includes
incorporation of the new system
elements into the plant’s existing solids
processing systems. Project elements
include new acid-phased digesters,
rotary drum thickening for separate or
co-thickening of primary and waste
activated sludge, rehab of dissolved air
flotation thickeners for scum thickening,
rehabilitation of existing digesters, new
boilers and heating system
modifications, and acid digester gas
treatment for hydrogen sulfide removal.
> Project engineer for the San Jacinto
Regional Water Reclamation Facility
Title 22 Tertiary and Plant 2 Facilities
Expansion for the Eastern Municipal
Water District, California. The project
expanded plant capacity to 14-mgd
average annual flow through the
expansion of the digestion and solids
handling facilities as well as the
replacement of the existing headworks,
addition of a new liquid treatment train,
and expansion of the tertiary treatment
facilities. Her primary design
responsibilities included two new 80-ft
diameter digesters with Rotamix mixing
systems, chopper pump-based sludge
recirculation and heating systems,
heating and feed system modifications
for three existing digesters, a new
sludge storage tank, a boiler facility and
primary heating system for the
digesters, primary sludge and scum
pump stations, a digested sludge
transfer pump station, and a waste
activated sludge thickening facility with
rotary drum thickeners. As part of
preliminary design, she also analyzed
the modifications required for an
existing sludge pasteurization system to
meet Class A biosolids requirements.

Subject matter expert/solids system
lead for Phases 1 and 2 of the Hilo
WWTP Rehabilitation Project for
County of Hawaii. Her responsibilities
include preliminary and final design of
the solids processes for this wholesale
upgrade of the plant. Solids system
project elements include new
thickening, dewatering, cake storage
and truck loadings systems in a new
solids handling building; three new
digesters and control buildings with new
boilers, digester mixing and sludge
heating recirculation systems, sludge
transfer system, hot water pumps;
sludge blending; snail removal from
sludge streams; and digester gas
conditioning.
> Process engineer for Union Sanitary
District’s (USD) Primary Digester No. 8
Feasibility Study which evaluated the
feasibility of constructing a new Primary
Digester No. 8 in multiple areas of the
plant and evaluated repurposing
opportunities for Primary Digesters No.
1 through 3.
> Solids process engineer for the
Anaerobic Digester No. 4 and FOG
Receiving Facility Project for the Dublin
San Ramon Services District in Dublin,
California.
322

EDUCATION
MS Civil Engineering,
University of California,
Berkeley, 1994
BS Civil Engineering,
University of California,
Irvine, 1993

LICENSES
Structural Engineer,
California, Georgia,
Oregon
Civil Engineer, California
Professional Engineer,
Utah, Colorado,
Tennessee, South Dakota
Civil/Structural Engineer,
Washington

PROFESSIONAL

AFFILIATIONS
American Concrete
Institute
American Institute of
Steel Construction
James A. Doering, PE, SE
James Doering, a registered structural and civil engineer, is Carollo’s structural lead engineer in Southern California. He manages structural design and evaluations for large and small projects. He has 31 years of experience in structural analysis, design, seismic retrofit, rehabilitation, review, and assessment for a variety of structures, such as wastewater and water treatment facilities, pump stations, reservoirs, tanks, clarifiers, large pipe supports, retaining walls, operations and maintenance facilities, office buildings, parking structures, post tensioned concrete structures, retail shopping centers, and warehouses.

RELEVANT EXPERIENCE
> Lead structural engineer for the
County of San Luis Obispo Los Osos
Water Reclamation Facility. The project
included a new 3-mgd wastewater
treatment plant with headworks,
oxidation ditch, secondary clarifiers,
equalization pond, digester, solids
handling, blower building, electrical
building, and administrative/
maintenance facilities. Challenges at the
site included high seismicity and
expansive soils.
> Structural engineer for El Estero
Wastewater Treatment Plant Digester
Nos. 1 and 2 Rehabilitation for the City
of Santa Barbara, California. The project
included identification of cracks at the
interior of the digesters requiring
repairs/sealing and preparation of
associated details and repair procedures.

The interior concrete was also repaired
and coated with a polyurethane sprayon liner.
> Structural engineer for the Phase II
Wastewater Treatment Plant Expansion
for the City of Santa Maria, California.

Facility additions included a 145-foot
diameter primary clarifier, trickling filter,
anaerobic digester, digester control
building, sludge drying beds, and a bar
screen addition to the existing
headworks.
> Structural engineer for the Planning
Analysis for West Point Digestion
Capacity for King County, Washington.

The study involved a seismic resiliency
evaluation of (6) 100-ft diameter
prestressed concrete digesters and (2)
digester control buildings. The digesters
were evaluated per ACI 350 and AWWA
D110. The buildings were evaluated per
ASCE 41-17, Tier 1. A thermal analysis
was also conducted to evaluate
performance if the digesters were
converted from mesophilic to
thermophilic operation. Findings and
recommendations were summarized in a
report.
> Structural engineer for the Seismic
Resiliency Program and AK Warren
Seismic Evaluation for Los Angeles
County Sanitation Districts in Carson,
California. The scope of work included
the development of a seismic evaluation
program to be applied to the Districts’
facilities, including 72 structures at the
AK Warren WRF following ASCE 41 and
ACI 350 procedures. Structures
evaluated included process buildings,
basins, digesters, surge towers, and
solids storage facilities. The scope of
work also includes the development of
conceptual mitigation and risk scoring
to prioritize identified mitigation
projects.
> Structural engineer for the PS15-06
Seismic Evaluation of Plant 1 and 2
Facilities for Orange County Sanitation
District in Orange County, California.

The scope of work included evaluating
more than 60 structures following ASCE
41 and ACI 350 procedures. Structures
included single and multi-story process
323
James A. Doering, PE, SE
“Without a doubt
James Doering added
a tremendous value
to the Carollo team
and was absolutely a
contributing factor to
the overall success of
these critical projects
at the EWPCF.”
- James Kearns,
Capital Projects
Manager, Encina
Wastewater
Authority, referring to
the EWPCF Influent
Junction Structure
Rehab and Ocean
Outfall-Landfall
Inspection projects
and admin/service buildings, as well as,
digesters, aeration basins, surge towers,
and gas holders. Both ground shaking
and the response to ground
deformations due to liquefaction were
evaluated to identify vulnerabilities.

Conceptual structural and geotechnical
mitigation strategies were then
developed and prioritized to assist the
District with implementation into their
Master Plan.
> Structural engineer for the Veolia
Water West Operating Services/City of
Palm Springs, California, Wastewater
Treatment Plant Upgrade. The project
included a new 22 mgd capacity
headworks with Parshall flume and
influent pump station, two new 100-ft
diameter primary clarifiers with FRP
launders, a primary sludge pump
station, an elevated sludge degritting
facility, odor control, replacement of the
existing Digester No. 2 floating steel
dome with a new fixed steel dome, and
an electrical building.
> Structural engineer for the Moreno
Valley Regional Water Reclamation
Facility Preliminary Treatment and
Acid-Phase Anaerobic Digestion
project for the Eastern Municipal Water
District, California. Design included
headworks and influent pump station
modifications, grit basin, acid-phase
digester, methane-phase digester, boiler
facility (concrete masonry unit (CMU)
building), electrical buildings, and other
process-related structures and
modifications.
> Structural engineer for the J.B.

Latham Wastewater Treatment Plant
Digester No. 3 Upgrades for the South
Orange County Wastewater Authority,
California. The project included
rebuilding of the interior concrete
surface at the upper walls and bottom of
the roof slab with shotcrete and the
provision of a protective liner.
> Structural engineer for the final
design of the Southeast Water
Reclamation Plant Solids Handling
Improvements Project for the City of
Lubbock, Texas. The project included
replacement of existing belt press
facilities with new rotary drum
thickeners and centrifuges along with
replacement of existing fiberglassreinforced plastic (FRP) chemical storage tanks inside of an existing 21,000-
square-foot Concrete Masonry Unit
(CMU) building with precast concrete
double-tee roof framing.
> Structural engineer and value
engineer team member for the San
Jacinto Regional Water Reclamation
Facility, Title 22 Tertiary Upgrade and
Plant 2 Expansion for the Eastern
Municipal Water District, California.

The project included primary and
secondary clarifiers, aeration basins, a
blower building, a waste activated
sludge (WAS) thickening building with
four rotary drum thickeners supported
on elevated concrete piers, biofilters,
chlorine contact basins, digesters, filter
canopies, 10,000-square-foot operations
and administration building, electrical
buildings, flocculation basins, and other
process-related structures.
> Structural engineer for the City of
Tulare, California, J Street and Alpine
Vista Water Storage Tank
Improvements. The project involved
planning, preliminary and final design,
and engineering services during
construction of two 2-MG concrete
potable water storage tanks and two
wells. The storage tanks are designed to
supply the flow needed between the
peak day and peak hour demand to
mitigate low pressure issues.
324

EDUCATION
BS Mechanical
Engineering, Texas A&M
University, 2004

LICENSES
Professional Engineer,
Colorado, Nevada,
Oregon
Mechanical Engineer,
California, Idaho,
Massachusetts

PROFESSIONAL

AFFILIATIONS
Water Environment
Federation
Pacific Northwest Clean
Water Association (WEF
affiliate)
Darrell L. Buhman, PE
Darrell Buhman has 21 years of Mechanical engineering experience in a variety of technical and leadership roles. He has served as the lead design process mechanical engineer, technical advisor, and quality control reviewer for cogeneration and digester gas conditioning systems, plant process heating systems utilizing both combined heat and power systems and dual-fuel boilers, cooling towers, standby generators, process heat recovery, and gas handling projects including waste gas burners and gas compression. Darrell has also provided technical guidance in a variety of ways for biogas upgrading to renewable natural gas projects.

As a technical leader, Darrell has supervised and mentored junior and mid-level engineers in process mechanical energy work and provided quality control reviews and acted as technical advisor on a variety of energy design projects. As Carollo’s Mechanical Division lead, Darrell sets the direction of the discipline, develops talent, and oversees standards development.

RELEVANT EXPERIENCE
> Technical advisor for the City of
Burlingame, California, WWTF Digester
Improvements Project. This project
included preliminary design of a new
digester with pump mixing, a new sludge
storage tank, and a new digester
equipment building. Evaluation of the
existing heat loop and cogen system was
completed to size new heat exchangers
and sludge circulation pumps. Darrell was
the technical advisor and reviewer for the
digester gas handling system modeling
and heat loop system upgrades.
> Technical reviewer for the City of
Oxnard, California, heat reservoir
upgrades technical memorandum and
associated heat demand calculations.

The project calculated current and future
heat demands and then evaluated the
current digester heating system's ability
to meet the current and future heat
demands by utilizing the existing
cogeneration engines and sludge heat
exchangers. Duties included coordinating
with City staff, providing responses to the
City's comments, and integrating the
client's comments.
> Lead mechanical engineer for the
San Francisco Public Utilities
Commission (SFPUC) CS-235 Southeast
Plant biosolids digester facilities and
cooling tower area. Darrell provided
design drawings, process and
instrumentation drawings, and control
narratives for a new three-cell cooling
tower and associated water circulation
system designed to provide cooling water
to several new digester sludge heat
exchangers at the facility. The cooling
tower has a total capacity of 1,800 tons
and the cooling water system was
designed to circulate 2,500 gallons per
minute with constant-speed centrifugal
pumps in a duty/standby configuration.

The cooling towers cool sludge via the
heat exchangers that underwent a
thermal hydrolysis process to enhance
digestion.
> Peer technical reviewer for the
Central Contra Costa Sanitary District's
preliminary design of a biosolids
improvements project, California.

Darrell reviewed the cogeneration,
digester gas handling, and heating
predesign documents.
> Mechanical engineering technical
advisor and lead mechanical engineer
for the County of Hawaii's Hilo WWTP
Digestion, Solids Handling, and
Headworks Improvement Project, HI.

The portion of the project that Darrell
was involved in included the addition of
325
Darrell L. Buhman, PE
two new digesters and a digester control
building. Darrell oversaw the design of
the boilers, heat loop, sludge heat
exchangers, digester gas conveyance,
and waste gas burner systems.
> Lead mechanical engineer and
design manager for the City of
Meridian, Idaho, Digester 6 Expansion
Project. Darrell was the lead mechanical
engineer responsible for the design of
the biogas handling system and sludge
heating system for a new digester facility.
> Lead mechanical engineer for the
City of Loveland, Colorado, digester
and heating system upgrades. Darrell
designed the new plant heating system
using two new dual fuel boilers,
concentric tube heat exchangers for
sludge heating, and the waste gas burner
and gas handling system for this digester
addition.
> Technical advisor and quality
control reviewer for the St Joseph, MO
digester gas compression design. The
design included compression of digester
gas for use in the thermal dryer, as well
as a review of the gas mixing system
design. Darrell was the mechanical
technical advisor and QC reviewer for the
project.
> Lead mechanical engineer for Metro
Water Recovery's Cogeneration
Equipment Replacement Project,
Colorado. This project replaced the
existing digester gas-fueled turbine
cogeneration facility with a new biogas
upgrade system for pipeline injection and
a new hot water boiler facility. The
cogeneration system provided most of
the plant's process and building heat, so
four new high-temperature hot water
boilers (300 deg F design temperature)
were designed by Darrell to provide heat
to the biogas upgrade skid, digesters,
and building mechanical systems. Darrell
also designed a heat recovery from the
biogas upgrade system via industrial
water to water heat pumps, where the
waste heat is used to heat the digester
process.
> Lead mechanical engineer for the
Metropolitan Wastewater Management
Commission (MWMC) Water Pollution
Control Facility (WPCF), Oregon,
Digester Complex Expansion. Darrell
designed an entirely new digester gas
conveyance system and a new plant
heating system as part of the addition of
a fourth digester at the WPCF in Eugene.

The existing plant heating system, boiler,
and gas system was demolished and
replaced with an updated modern layout
and larger capacity systems. The new
digester utilized draft tube mixers with
jacket heat exchangers for sludge
heating.
> Lead mechanical engineer for the
City of Gresham, Oregon, Gas Handling
and Heat Loop Upgrades. Darrell
designed a new plant heating system that
accommodated both the current heating
demands at mesophilic digestion
temperatures and future heating
demands at thermophilic temperatures if
the plant updates its digestion
temperature in the future. Darrell was
responsible for the new waste gas burner
design and new digester gas handling
system.
> Mechanical engineer for the City of
Medford, Oregon, Regional Water and
Reclamation Facility Cogeneration and
Gas Conditioning Project. This project
included the demolition of an existing
340-kW cogeneration system and
replacement with a new 750 kW
cogeneration system, along with a new
digester gas conditioning system to
pressurize the digester gas and remove
hydrogen sulfide, moisture, and siloxanes.
326

EDUCATION
MS Civil Engineering,
University of Missouri,
Kansas City, 2012
BT Civil Engineering,
Indian Institute of
Technology, Bombay,
1998

LICENSES
Professional Engineer
(Civil), California

PROFESSIONAL

AFFILIATIONS
American Society of Civil
Engineers (ASCE)
Society of Protective
Coatings
Jitesh K.R. Nalagotla, PE
Jitesh Nalagotla, a senior engineer with Carollo, has 27 years of experience in structural design of water, wastewater, industrial and commercial projects. Since joining Carollo, he has overseen the structural design and evaluation of several water and wastewater projects. Jitesh has extensive experience in seismic design of large new structures, as well as seismic evaluation and retrofit of existing structures. Jitesh’s core strengths include problem solving and teamwork.

RELEVANT EXPERIENCE
> Structural engineer for the City of
Visalia, California, Water Reclamation
Facility Solids Handling Improvements
Design. The project included completing
predesign and final design to address
solids handling capacity issues and
improve performance, while providing
better access for long-term
maintenance. This project will result in
increased capacity and performance of
solids handling processes, including
improved thickening performance
resulting in increased digester capacity,
increased dewatering capacity, increased
sludge drying capacity, and improved
maintenance flexibility for thickening
conveyance and digestion.
> Structural engineer for the City of
Fresno, California, Regional Water
Reclamation Facility Sidestream
Treatment. The project involves piloting,
designing, and providing engineering
services during construction for an
ANITA™ Mox system. Responsible for
design of all structures, including
concrete basins, monorail systems,
concrete walkways and a single-story
equipment building.
> Structural engineer for the City of
Santa Rosa, California, Laguna
Treatment Plant Disinfection
Improvements. The project included
design of a 70-mgd UV system for that
will meet California Title 22 standards to
classify it as the largest low-pressure,
high-output UV system in the U.S. at the
time of construction. Responsible for
engineering services during construction
support, including responses to requests
for information, shop drawing review,
and preparation of design clarification
documents.
> Structural engineer for the Cities of
Reno and Sparks, Nevada, Truckee
Meadows Water Reclamation Facility
Disinfection and Filtration Process
Expansion. The primary goal of this
project is to evaluate and provide
recommendations for process
improvements and capacity expansion
for the tertiary filters and disinfection
facility. The new filtration system and UV
disinfection systems must be capable of
consistently producing effluent that
meets the current and future effluent
limitations, as well as Nevada Category
A or B reuse standards under both
normal and upset secondary effluent
conditions. Responsible for seismic
evaluation of existing structures,
including filter building, chlorine contact
tank, and chemical building, as well as
design of all new structures.
> Structural engineer for the City of
Hayward, California, Main Switchgear
(MSB) Electrical Distribution
Rehabilitation. The project involved
switchgear replacement inside the
existing cogeneration building, which
required retrofitting to cost-effectively
house the new switchgear. Responsible
for design of all retrofits.
> Structural engineer for the City of
Turlock, California, Regional Water
Quality Control Facility Chemical
System Upgrades. The project involved
converting the disinfection system from
chlorine gas to sodium hypochlorite and
rehabilitating the aluminum
327
Jitesh K.R. Nalagotla, PE
chlorohydrate and sodium bisulfite
systems. Responsible for design of all
structural rehabilitation and repairs.
> Structural engineer for the Marin
Municipal Water District, California,
Richmond-San Rafael Bridge
Emergency Water Intertie. Responsible
for engineering services during
construction support and design of all
structures, including a pile foundation
system for a welded steel water storage
tank.
> Structural engineer for the Truckee
Donner Public Utility District,
California, Water Storage Tank
Rehabilitation. The project included
seismic analysis and condition
assessment of 31 steel water storage
tanks ranging in capacity from 0.3 MG
to 1 MG, as well as design for
rehabilitation and seismic retrofit of 1
tank. Responsible for seismic evaluation
of all the 31 water storage tanks, repairs,
and rehabilitation of two water storage
tank including an elevated steel water
tank.
> Structural engineer for the Truckee
Donner Public Utility District,
California, Prosser Lakeview and Ski
Run Tanks Rehabilitation. The project
included an evaluation of Ski Run and
Prosser Lakeview tanks that identified all
areas of tank repair, rehabilitation, and
replacement; preparation of
recommendations regarding coating,
required modifications/updates, and
budget level cost estimates; and
preparation of a preliminary design
report with proposed alternatives and
bidding documents for tank
rehabilitation and repairs, including
coating for the options selected by the
District. Responsible for repairs and
rehabilitation of the water tanks.
> Structural engineer for the City of
Pleasanton PFAS Treatment and Wells
Rehabilitation. The project’s overall goal
was to rehabilitate Wells 5, 6, and 8 to
implement PFAS treatment and extend
their useful life as reliable, locally
controlled sources of water for the City.

Responsible for design of all structures.
> Structural engineer for the City of
Ukiah, California, Recycled Water
Project, which includes 17,510 feet of
12- and 16-inch PVC pipe, booster
pump station, and storage pond.

Preliminary design included
coordination with customers for
demands and turnout locations, utility
investigation, geotechnical investigation,
and topographic survey. Responsible for
design of all structures, including
rehabilitation of an existing earth basin
containing organic material with a
reinforced concrete liner, foundation
system, and embankment supported on
pile foundations for a railcar pedestrian
bridge.
> Structural engineer for the Santa
Cruz County Sanitation District,
California, Rodeo Gulch Pump Station
Capacity Analysis and Improvements.

The project involved a capacity
evaluation of the Rodeo Gulch Pump
Station, an alternatives analysis for
capacity upgrades, and final design of
the selected alternative. Responsible for
design of all structures.
> Structural engineer for the Alameda
County Flood Control and Water
Conservation District, California, Zone 7
Water Agency Chain of Lakes
Centralized PFAS Treatment Facility.

The project involved design of a
centralized PFAS treatment plant for
three groundwater wells. The centralized
treatment plant is a 7,100-gpm system
that consists of granular activated
carbon or ion exchange.
328

EDUCATION
BS Electrical and
Electronic Engineering,
California State
University, Sacramento,
2008

LICENSES
Electrical Engineer,
California

PROFESSIONAL

AFFILIATIONS
Institute of Electrical and
Electronic Engineers
Erik M. Bahneman, PE
Erik Bahneman has 17 years of experience in the design of electrical, instrumentation, and control systems for water and wastewater projects, including switchgear, motor controls, instrumentation, and supervisory control and data acquisition (SCADA) systems. His experience includes the coordination of electrical work with civil, structural, and mechanical work, during both the design and construction phases of a project.

RELEVANT EXPERIENCE
> Lead electrical engineer for the City
of Visalia, California, Water
Reclamation Facility Solids Handling
Improvements Design. The project
included completing predesign and final
design to address solids handling
capacity issues and improve
performance, while providing better
access for long-term maintenance. This
project will result in increased capacity
and performance of solids handling
processes, including improved
thickening performance resulting in
increased digester capacity, increased
dewatering capacity, increased sludge
drying capacity, and improved
maintenance flexibility for thickening
conveyance and digestion.
> Electrical engineer for the City of
Burlingame, California, Wastewater
Treatment Facility and Master Plan. Led
the electrical and instrumentation
evaluations for the plant’s two anaerobic
digesters, digested sludge storage tank,
digester equipment building, and gravity
thickener, and developed replacement
improvements for the plant’s main
switchgear and various solids handling
control panels.
> Electrical engineer for the West
County Wastewater, California,
Carriage Hills, D'Avila, La Honda, and
Tara Hills Lift Stations Upgrades.

Various improvements at each lift
station included upgrades to electrical
system including service modifications,
new standby generators, sequencing
evaluations, hazardous area evaluations,
ventilation, pump and variable
frequency drive replacement, new
electrical gear replacement, site security
communication system, and
instrumentation.
> Electrical engineer for the
Sacramento Area Sewer District,
California, Sailor Bar Pump Station
Rehabilitation. The project involved
replacement of a wet-pit/dry-pit
wastewater pump station with a new
submersible station. A configuration of
two separate wet wells and four pumps
was selected to increase redundancy in
an environmentally sensitive location.

Other challenges included liquefiable
soils, high turndown ratios between
average and peak flows, dual force
mains, transient surge protection,
location in the 100-year floodplain, and
construction sequencing to limit bypass
pumping requirements.
> Lead electrical engineer for the
Sacramento Regional County
Sanitation District, California,
EchoWater Project $400 million
Tertiary Treatment Facilities Project
(TTF). TTF will provide filtration and
disinfection of secondary effluent to a
level equivalent to Title 22 requirements
for tertiary disinfected recycled water for
unrestricted reuse. TTF includes a 330-
mgd filter influent pump station, 217
mgd of granular media filters, backwash
equalization and treatment, chemical
feed systems, covered disinfection
contact basin, three electrical
substations, and a new area control
center.
> Lead electrical engineer for the
West County Wastewater District,
329
Erik M. Bahneman, PE
California, Electrical Replacement.

Designed the replacement and
relocation of an existing 480V
switchgear lineup serving the majority of
the plant’s motor control centers.

Developed a detailed construction
sequencing plan designed to minimize
the disruption to plant operations, and
contributed to a plan for replacing the
majority of the plant’s motor control
centers.
> Electrical engineer for the City of
Modesto, California, Tertiary Treatment
Plant Phase II Biological Nutrient
Removal engineering services during
construction. The 12.6-mgd project
included a primary effluent pump
station, rotary drum fine screens, three
new nitrifying/denitrifying aeration
basins, turbo blowers, mixed liquor fine
screens, six membrane bioreactors, 80-
mgd return activated sludge pump
station, in-channel UV system, and
effluent and utility water pump station.
> SCADA engineer for the City of
Patterson, California, Wastewater
Treatment Plant. Developed a new
Inductive Automation SCADA
application to replace the existing
Wonderware graphics and incorporate
the older facility, which had no previous
networking. The pre-existing look and
feel were blended with the improved
features of Inductive Automation for a
seamless transition to a higher quality
product that displayed more
information in clearer fashion.
> Instrumentation engineer for the
Placer County Sewer Maintenance
District, California, Wastewater
Treatment Plant Upgrade and
Expansion. Designed instrumentation
upgrades for most of the plant facility,
including new facilities for biological
removal of nutrients and a new
ultraviolet disinfection system. Authored
specifications including complete,
detailed control strategies for plant
processes, and wrote addendums for
electrical specifications.
> Electrical engineer for three projects
completed for the City of Livermore,
California, Water Reclamation Plant
(WRP). These include the Aeration Tank
Modifications, Hypochlorite Mixer
Relocation, and Electrical Design
Guidelines that developed electrical
standards for use on design projects at
the WRP.
> Electrical and instrumentation
engineer for the City of Arcata,
California Arcata Wastewater
Treatment Plant Improvements Final
Design, Phase I. The project consisted of
the final design for replacement and
new treatment processes including
headworks, pond improvements,
wetlands improvements, pump stations,
a new oxidation ditch and secondary
clarifiers for nutrient removal, and a new
UV disinfections step.
> Engineer for the Clark Regional
Wastewater District, Washington,
Discovery Corridor Wastewater
Transmission System (DCWTS) Phase I
engineering services during
construction. The DCWTS was
constructed to convey flows from the
City of Ridgefield Wastewater Treatment
Facility (WWTF) to the Clark Regional
Salmon Creek WWTF. This included
upgrade of three pump stations and
construction of one new pump station,
seven miles of parallel 14- and 20-inchdiameter force mains, and 3,400 feet of 24-inch gravity sewer pipe. The 7.2-mgd
Pioneer Canyon Pump Station was
designed to accommodate multidirectional pumping via future force main.
330

EDUCATION
BS Mechanical
Engineering Technology,
California State
University, Sacramento,
2000

LICENSES
Electrical Engineer,
California
Daniel S. Robinson, PE
Daniel Robinson has 25 years of electrical and control systems experience in the water and wastewater industry. His experience includes supervising engineering teams, training new engineers, and developing engineering standards. Along with proficiency in AutoCAD Electric, Excel, Access, and SharePoint, Mr. Robinson’s engineering skills include 480VAC electrical distribution systems; variable frequency drives (VFDs), reduced voltage soft starter (RVSS), and full-voltage (FV) motor control design; programmable logic controller (PLC) and industrial control panel design; control system architecture; serial, Ethernet, and radio communication; process instrumentation requirements; water/wastewater treatment processes; project management; UL, NEC, NEMA, and NFPA 70E requirements; and relay and ladder logic.

RELEVANT PROJECTS
> Lead instrumentation engineer for
the City of Visalia, California, Water
Reclamation Facility Solids Handling
Improvements Design. The project
included completing predesign and final
design to address solids handling
capacity issues and improve
performance, while providing better
access for long-term maintenance. This
project will result in increased capacity
and performance of solids handling
processes, including improved
thickening performance resulting in
increased digester capacity, increased
dewatering capacity, increased sludge
drying capacity, and improved
maintenance flexibility for thickening
conveyance and digestion.
> Electrical and instrumentation
engineer for the Rock Creek Advanced
Wastewater Treatment Facility Digester
Improvements Final Design for Clean
Water Services, Oregon. Design for
modifications to the existing digesters at
the Rock Creek AWTF.
> Instrumentation and controls
engineer for the Sacramento Regional
County Sanitation District, California,
EchoWater Project Nitrifying
Sidestream Treatment Project (NST).

NST uses sequencing batch reactors to
treat high ammonia loads being
returned to the Sacramento Regional
Wastewater Treatment Plant from the
solids storage basins. The high nitrate
NST effluent will then be used for odor
control in the influent interceptor to
offset the cost of sodium hypochlorite.

The project includes influent and
effluent pumping, sequencing batch
reactors, effluent flow equalization, lime
feed for alkalinity control, aeration
blowers, and associated electrical and
instrumentation systems. NST must
interface with several other EchoWater
projects, including Site Preparation, Flow
Equalization, Disinfection Chemical
Storage, and Biological Nutrient
Removal/Primary Effluent Pump Station.
> Electrical/instrumentation engineer
for Clean Water Services, Oregon, Rock
Creek Advanced Wastewater Treatment
Facility Gravity Thickeners. The project
involved construction of four new
gravity thickeners in an operating plant
and included relocation of an existing
major 480V ductbank, addition of
sections to an existing MCC for new VFD
and FV motor controls, addition of a
new control panel with an Allen-Bradley
ControlLogix PLC, integration into the
existing plant SCADA, and
instrumentation for flow, level, pressure,
and temperature. The project also
included modifications to existing solids
processes and systems with complex
sequencing of installation and startup to
not interrupt treatment plant operation.
331
Daniel S. Robinson, PE
> Instrumentation and controls
engineer for the City of Roseville,
California, Dry Creek Wastewater
Treatment Plant MCC and Switchgear
Replacement Design-Build project. The
project includes replacement of five
motor control centers and one
switchgear at the City's Dry Creek
Wastewater Treatment Plant. Carollo is
providing design and engineering
services during construction to the lead
design-builder, Auburn Constructors.
> Instrumentation and controls
engineer (I&C) for the City of Roseville,
California, Pleasant Grove Wastewater
Treatment Plant UV Replacement. The
project included evaluation of UV
alternatives, CFD modeling, design,
engineering services during
construction, start up and
commissioning, and regulatory support
and permit modifications for Title 22
recycled water production and wet
weather discharge to surface water.

Responsible for assisting the lead I&C
engineer with the initial phase of the
I&C design, attending local meetings,
and site inspection.
> Electrical/instrumentation engineer
for the Tahoe-Truckee Sanitation
Agency, California, Sewer Master Plan
and Condition Assessment. The project
assessed the condition of the Water
Reclamation Plant with the goal of
developing a capital improvement plan
for the next 25 years.
> Electrical/instrumentation engineer
for design and engineering services
during construction for the City of San
Mateo, California, Wastewater
Treatment Plant Process Control
System Upgrade and Collection System
SCADA Integration. The project includes
replacement of most of the PLC control
panels in the plant with a modern AllenBradley ControlLogix PLC control system, replacement of the existing
SCADA system with a new SCADA
system that includes remote view nodes
located in all of the major process areas
of the plant, and installation of a new
fiber optic backbone communication
network extending the PLC network,
SCADA network, and business network
throughout the entire plant. The
installation of the new control system
will be done in phases with complex
sequencing to reduce facility downtime
and ongoing City and contractor
coordination.
> Managed the City of Reno, Nevada,
Reno/Stead Water Reclamation Facility
Expansion. The project consisted of a
headworks, oxidation ditch, aeration
basin, secondary clarifier, tertiary filters,
chlorine contact basin, and effluent
structure. The project included 15KV
main switchgear, 5KV switchgear with
ATS and power distribution, 480V power
distribution with SPD and power
monitors; MCCs with 18-pulse VFDs, 6-
pulse VFDs, and non-reversing starters
with electronic overload and smart relay
controls; control panels with Modicon
Quantum PLCs and Modicon HMI; MB+
fiber optic ring communications to a
new Wonderware SCADA system; field
instrumentation including flow, level,
pressure, dissolved oxygen, oxidation
reduction potential, and hazardous gas
monitoring; coordination of intrinsically
safe requirements; and power, control,
and communication interconnection
diagrams, testing, training, and final
documentation.
332

EDUCATION
MS Civil Engineering,
California State
University, Sacramento,
2006
BS Civil Engineering,
California State
University, Sacramento,
2002
AS General Science, Yuba
Community College, 1999

LICENSES
Civil Engineer, California,
Hawaii

CERTIFICATION
Project Management
Bootcamp, PSMJ
Resources, Inc.

PROFESSIONAL

AFFILIATIONS
American Public Works
Association
Ryan A. Hook, PE
Ryan Hook has 23 years of civil engineering work experience, including planning, design, and construction of wastewater treatment facilities, wastewater pump stations and pipelines, potable water pump stations and pipelines, structural design of buildings, and soil percolation testing for septic systems.

RELEVANT EXPERIENCE
> Lead civil engineer for the City of
Visalia, California, Water Reclamation
Facility Solids Handling Improvements
Design. The project included completing
predesign and final design to address
solids handling capacity issues and
improve performance, while providing
better access for long-term
maintenance. This project will result in
increased capacity and performance of
solids handling processes, including
improved thickening performance
resulting in increased digester capacity,
increased dewatering capacity, increased
sludge drying capacity, and improved
maintenance flexibility for thickening
conveyance and digestion.
> Civil engineer for the City of
Roseville, California, Pleasant Grove
Wastewater Treatment Plant Phase I
Expansion. Design included adding new
primary sedimentation basins, new
oxidation ditch, new secondary clarifier,
fine screens structure downstream of
the secondary clarifiers to remove fruit
labels, two new digesters with a digester
control building, and new thickening
building. Designed yard piping, paving,
and grading for the new improvements.
> Civil engineering discipline technical
advisor for the Sacramento Regional
County Sanitation District, California,
EchoWater Project Flow Equalization
Project (FEQ). The $130 million FEQ will
provide an additional 110 MG of storage
capacity for the Sacramento Regional
Wastewater Treatment Plant. Additional
features include roller-compacted
concrete lined basins, spillways and
interconnections structures, 84-inchdiameter final effluent distribution pipeline, underdrain pump station, and
basin washdown system.
> Lead civil engineer for the
Sacramento Regional County
Sanitation District, California,
EchoWater Project Nitrifying
Sidestream Treatment Project (NST).

The project includes influent and
effluent pumping, sequencing batch
reactors, effluent flow equalization, lime
feed for alkalinity control, aeration
blowers, and associated electrical and
instrumentation systems.
> Project manager for the West
County Wastewater, California,
Carriage Hills, D’Avila, La Honda, and
Tara Hills Lift Station Upgrades. Various
improvements at each lift station
included pump replacement, wet well
concrete rehabilitation, evaluation of
bypass capabilities, pump hoist systems,
new standby generators, electrical
system upgrades, ventilation, site
security communication system, and
instrumentation.
> Project manager for the Sacramento
Area Sewer District, California, Sailor
Bar Pump Station Replacement. The
project involved replacement of a wetpit/dry-pit wastewater pump station with a new submersible station. A
configuration of two separate wet wells
333
Ryan A. Hook, PE
and four pumps (two duty, two standby)
was selected to increase operational
redundancy in an environmentally
sensitive location. Other challenges
included liquefiable soils, high turndown
ratios between average and peak flows,
dual force mains, transient surge
protection, raising the site out of the
100-year floodplain, and construction
sequencing to limit bypass pumping
requirements.
> Design engineer for the Sacramento
Regional County Sanitation District,
California, EchoWater Project Return
Activated Sludge Pumping Project
(RAS). Assisted with development of
project sequencing for the $32 million
RAS, which replaces existing return
activated sludge pumps with new
pumps designed to deliver the higher
flow and head conditions required by
the new biological nutrient removal
(BNR) process. RAS will have a capacity
of more than 200 mgd and includes 48
pumps located at 24 secondary
sedimentation tanks. Preliminary design
included an in-depth implementation
plan to allow construction of
improvements while minimizing the
impact on the operation of the existing
plant, as well as a completion schedule
to allow timely commissioning of the
new BNR facility.
> Project manager for engineering
services during construction of the City
of Yuba City, California, Vactor Dump
Station. The City uses vactor trucks to
clean out each of its 17 wastewater lift
stations and the influent well at the
treatment facility. A temporary dumping
station was being used to allow vactor
trucks to empty their waste, which was
time consuming, and haulers had to
actively scrape screens to decant water.

The new vactor dump station allows
vactor trucks to directly dump their
waste onto grating that drains to a
manhole to return the screened water to
the headworks. The structure and
grating were designed to allow a front
loader to scrape the screenings off of
the grating.
> Project engineer for the El Dorado
Irrigation District, California, El Dorado
Hills Wastewater Treatment Plant
Phase III Expansion, which increased the
capacity of the treatment plant to 8.4
mgd. The project consisted of numerous
modifications and additions to the
existing treatment facility, including
adding two biological nutrient removal
basins and two aeration basins.

Responsible for the biological nutrient
removal and aeration basin designs.

Assigned tasks to subordinate engineers
and drafters and coordinated work with
other consultants and subconsultants.

During construction, answered requests
for information and fielded questions at
the jobsite to minimize impacts to the
construction schedule and budget.
> Design engineer and lead inspector
for the City of Roseville, California, Dry
Creek Wastewater Treatment Plant
Chlorine Conversion to UV Disinfection.

This project replaced a chlorine gas
disinfection system with ultraviolet
disinfection to disinfect the final effluent
prior to discharge into Dry Creek and
added on-site sodium hypochlorite
generation to disinfect recycled water.

Performed yard piping, paving, and
grading designs during the design
phase of the project. Duties during
construction included full-time
inspection, answering requests for
information, submittal review,
maintaining as-built contract
documents, and coordinating
inspections with other inspectors and
subconsultants.
334
Scott Roberts, PLS
Land Surveyor
Scott supports public improvement projects with professional surveying. He is skilled in AutoCAD Civil 3D, Trimble GNSS & Robotic TS, Trimble Business Center, Trimble RealWorks, and Terrestrial LiDAR. His responsibilities include project management, topographic/boundary surveying and mapping, underground utility locating, construction staking, elevation certificates, laser scanning, legal descriptions, and GIS.

PROJECT EXPERIENCE
BRIDGING HORIZONS INCLUSIVE PARK
Visalia, CA | Project Surveyor
Westwood is currently supporting the City of Visalia with the development of Bridging Horizons Inclusive Park. Funded by the Prop 68 program, this park project will improve the open space acreage to population ratio and provide local residents with additional access to both open space and recreational amenities. Bridging Horizons Inclusive Park’s purpose‐driven design concept ensures that no child, adult, or senior will be excluded from taking part in recreation and active living. Scott is serving as Project Surveyor for this project.

RIVERWAY SPORTS PARK PHASE VI
Visalia, CA | Project Surveyor
Westwood is delivering civil engineering, land surveying, and landscape architecture services for the design of Riverway Sports Park Phase VI. Funded by the 2018 Parks Bond Act Per Capita Grant, this project focuses on designing and constructing an off‐ leash dog park. Additionally, it involves converting a temporary overflow parking lot into a permanent facility. Key improvements include the design of the parking lot, exit road, landscaping, sidewalks, bike routes, and a roundabout.

DELTA DIABLO DIGESTER DRAIN BASIN REHABILITATION
Pittsburg, CA | Project Surveyor
Scott served as Project Surveyor for this Delta Diablo Water District capital improvement project in Pittsburg, CA and was responsible for project management and quality control. The project was to develop plans for the rehabilitation of an existing digester basin that has been severely deteriorated from years of use.

Westwood established survey control for surveying and construction, performed detailed topographic surveys of the basin and surrounding area, and dipped several gravity structures in the vicinity. The project involved several safety and coordination challenges as the facility has strict security and safety protocols. Westwood worked closely with facility operators so field crews could access the facility and obtain the necessary safety orientation and verify proper use of PPE.

CCID SUBSIDENCE MONITORING NETWORK
Merced and Madera Counties, CA | Technical Lead
Scott worked with a team of surveyors in the establishment and ongoing monitoring of a subsidence benchmark network for the Central California Irrigation District. The initial phases of the project involved siting, setting, and measuring a network of benchmarks along dozens of miles of irrigation canals. This data was adjusted and used to generate benchmark datasheets for each individual benchmark, including information such as the district’s mile post, standardized photos, descriptions, and recovery information. Scott was the technical lead on the benchmark data collection/organization and prepared the benchmark datasheets. Scott also performed quality control checks of digital level data, and performed field surveys to capture digital level and RTK‐GNSS observation data for the benchmarks both initially and during multiple subsequent monitoring cycles.

EDUCATION
BS, Geomatics Engineering, California Stat
University ‐ Fresno, 2011

LICENSE/

REGISTRATIONS
PLS CA No. 9235,
Remote Pilot, Small Unmanned Aircraft
System No. 4751061

YEARS OF EXPERIENCE
15 YEARS WITH FIRM
9 335
MEMORIAL PARK WASTEWATER TREATMENT AND INFRASTRUCTURE REPLACEMENT PROJECT San Mateo County, CA | Project Surveyor
Westwood provided land surveying services for this wastewater treatment and infrastructure replacement project. Scott served as Project Surveyor. Services included topographic surveying and mapping. Westwood performed a topographic survey and mapping of the sanitary sewer system and wastewater treatment plant.

ORCHARD RUN WATER TREATMENT PLANT IMPROVEMENT PROJECT
Scotts Valley, CA | Project Surveyor
Scott served as Project Surveyor and provided survey support services for the Orchard Run Water Treatment Plant Improvement Project in Scotts Valley, CA. Westwood provided surveying services including topographic and boundary surveys, mapping of underground utilities, and other survey work to support the design of utility and site improvements at the plant.

PUMP STATIONS 18 AND 20
Redwood City, CA | Project Surveyor
Westwood provided land surveying services for this sanitary sewer pump station improvement project in Redwood City, CA.

Scott served as Project Surveyor. Services included topographic mapping and record boundary surveys to support the design of sanitary sewer pump station improvements at Pump Station 18 and Pump Station 20.

RALSTON AVENUE SEWER IMPROVEMENT PROJECT
Belmont, CA | Project Surveyor
Westwood provided land surveying services for this sewer improvement project. Scott served as Project Surveyor. Services included performing topographic surveying and mapping for the project limits where improvement work is recommended, spanning a 10‐foot corridor centered on the existing sewer alignment with shots taken each 50’ for profile generation; providing street centerlines per monumentation (if existing) and record centerline adjustment; locating all surface facilities/utilities and USA marked utilities; providing the location, rim, invert, and pipe diameter of accessible storm drain inlets, storm drain manholes, and sanitary sewer manholes; and providing the location, rim, and top of nut elevations for water valves.

SEWER PUMP STATIONS 9, 42, AND 55
Turlock, CA | Project Manager
Westwood performed topographic field and office surveying to provide critical information for the design of pump station improvements at three locations in Turlock, CA. For Pump Station 9, Pump Station 42, and Pump Station 55, Westwood completed topographic surveys. Scott served as Project Manager.

SLUDGE LAYDOWN AREA
Turlock, CA | Project Manager
Westwood provided land surveying services to support the design of a paved laydown area for dried sludge in Turlock, CA.

Services included topographic surveying and mapping and construction staking. Scott served as Project Manager.

SOUTH AREA GROUP TRANSMISSION PIPELINE AND SEWER PUMP STATION Folsom, CA | Project Surveyor
Westwood provided land surveying services to support the design of a pipeline in Folsom, CA. Services included survey control, topographic surveying and mapping, utility surveys, infill topographic surveying and mapping, GIS right‐of‐way validation, and land description packages. Scott served as Project Surveyor.

TURLOCK REGIONAL WATER QUALITY CONTROL FACILITY
Turlock, CA | Project Manager
Westwood provided land surveying services for the design of an equalization basin overflow system at the Turlock Regional Water Quality Control Facility. Services included topographic surveying and mapping. Scott served as Project Manager. 336
Neva M. Popenoe, PE, GE – Fresno Branch Manager
Professional Background:

Ms. Popenoe has over 20 years of geotechnical engineering and materials testing experience within the City of Visalia and Tulare County. She has worked on a variety of projects including highways, railroad and river bridges; flexible and rigid pavements; residential, commercial, and industrial developments; schools and hospitals; pipelines; power facilities; solar installations; impoundments; landfills; and forensic studies. She is responsible for managing and conducting geotechnical investigations including developing the scope of work and budget, site reconnaissance, field classification of soils, sampling, design, and report preparation and review. She has performed geotechnical investigations for over 100 bridges in the State of California for Caltrans, local cities and counties. In addition to bridge foundations, her design experience on these projects includes retaining walls, sound walls, roadway embankments recycled water and surface water facilities, and pavement structural sections. She also performs field inspection and testing, data analysis, laboratory testing, and construction special inspections.

Relevant Experience:

Sludge Transfer Station Fresno WWTP, Fresno, CA ‐ Assisted in providing geotechnical recommendations for shoring recommendations for proposed sludge transfer station associated with WWTP improvements.

Tertiary Treatment and Disinfection Facility, Fresno, CA ‐ 9/2011 to 3/2012 ‐ Conducted a geotechnical investigation for a proposed Tertiary Treatment and Disinfection Facility, which is being developed at the Fresno Wastewater Treatment Plant. Recommendations included construction considerations, bearing, settlement, lateral earth pressures, resistance to lateral loads, information for pipe design, pavement, and slope stability.

Mendota Sewer, Mendota, CA ‐ Performed geotechnical field investigation for a 30‐ inch diameter gravity sewer extending approximately 2.9 miles to the Mendota wastewater treatment plant.

City of Fresno, North Avenue Trunk Replacement at BNSF and UPRR Lines, Fresno, CA – Ms. Popenoe served as geotechnical engineer‐of‐record and Project Manager.

The replacement and realigning of the existing sewer trunk to include a 66‐inch pipeline with a trenchless crossing of BNSF and UPRR railroad lines, Fresno Irrigation District (FID) Fresno Colony Canal No. 24, and Golden State Boulevard. The proposed crossing is approximately 16 feet below grade with 84‐inch casing, using trenchless technology for the installation.

Wellhead Treatment – Well 22, Ceres, CA ‐ Ms. Popenoe served as the senior engineer and project manager for the geotechnical investigation for the wellhead treatment improvement project. Design included mat foundations for GAC vessels and other equipment.

Qualifications
Registrations:

Geotechnical Engineer,
California, 3024
Civil Engineer,
California, 73818
Education:

BS, Civil Engineering,
California Polytechnic
State University,
San Luis Obispo, 2005
Experience:

BSK Associates
Fresno Branch
Manager, 2023 ‐
Present
Senior Engineer, 2017
to 2023
Fresno State
University
Civil Engineering
Adjunct Instructor,
2019 to 2023
Kleinfelder
Project Manager,
2005 to 2017
Professional
Affiliations:

ASCE Fresno Branch:

Past President
APWA Central
California:

Vice President
337
Neva M. Popenoe, PE, GE – Fresno Branch Manager
1,2,3‐Trichloropropane (TCP) Comprehensive Remediation Design/Build Project, Atwater, CA – Ms.

Popenoe served as the senior engineer for the geotechnical investigation for five wellhead treatment facilities. Design included mat foundations for GAC vessels and other equipment, retaining walls and ringwall foundation systemsfor backwash tanks. BSK served asthe geotechnical engineer and construction materials testing consultant for this design‐build project.

Wellhead Treatment for TCP, Turlock, Tulare and Kingsburg, CA – Ms. Popenoe served as the senior engineer for the geotechnical investigation for seven wellhead treatment facilities. Design included mat foundations for GAC vessels and other equipment, retaining walls and ringwall foundation systems for backwash tanks.

Pipeline, Soults Mutual Water Company, Tulare County, CA – Ms. Popenoe served as the geotechnical project engineer for the design and construction of the Pipeline System. The pipeline transports water from the existing city well and connects to the existing water main at City property. The pipeline consists of an 8‐ to 12‐inch diameter PVC and ductile‐iron pipe water transmission pipeline. The pipeline required trenchless excavations at the canal and at SR 137.

City of Fresno Recycled Water Project, Fresno, CA 2017‐2018 – Senior engineer for various phases of the pipeline design and construction. The project includes over 4 miles of recycled water mains throughout south Fresno, with several trenchless crossings.

City of Fresno Surface Water Project, Fresno, CA 2009‐2017 – Senior engineer for various phases of the pipeline design and construction. The project includes over 4 miles of surface water transmission lines throughout Fresno, with several trenchless crossings. Design includes soil cement fill recommendations to protect the pipe at the creek crossing from potential scour.

Recharge Fresno Project, Fresno, CA – Geotechnical Engineer for the City’s $500,000,000 project, which included new water infrastructure pipelines and water system facilities that captures, treats and delivers water to the City, including surface water from the Sierra Nevada Mountains. Ms. Popenoe partnered with the designers for the geotechnical investigations for the over 40 miles of pipeline, trenchless crossings, and a new surface water treatment facility.

Comanche Tank, Bakersfield, CA ‐ 11/2005 to 4/2007 ‐ Conducted a geotechnical investigation for a 2.3 million‐gallon prestressed concrete storage tank supported on ringwall footings. The water storage tank is about 127 feet in diameter and 26 feet in height and was partially buried.

Fargo Avenue Storage Tanks, Hanford, CA ‐ 2/2006 to 3/2006 ‐ Conducted a geotechnical investigation for two, one million‐gallon welded steel water storage tanks and a booster pump station. The storage tanks are expected to be about 80 feet in diameter and 28 feet in height and are anticipated to be supported on a ringwall foundation system.

Water Reservoirs/Pump Stations, Turlock, CA ‐ 1/2007 to 6/2007 ‐ Conducted a geotechnical investigation for a 1.2‐million gallon welded steel water storage tank and an approximately 2,500 square foot booster pump station.

Conduit F Pipeline, Bakersfield, CA ‐ 11/2006 to 12/2006 ‐ Conducted a geotechnical investigation for an approximately 3.5 mile pipeline. The pipe was expected to be an 18‐ to 36‐inch PVC and cement‐mortar coated steel.
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Owning Resume | 1

LESLEY OWNING
Principal Planner
Ms. Owning is a Principal Planner with 13 years of experience in the provision of California Environmental Quality Act (CEQA) and National Environmental Policy Act (NEPA) documentation for a variety of project types including water/wastewater; restoration; parks and recreation; transportation;
infrastructure improvement; renewable energy; and
residential, commercial, and mixed-use land development. Ms.

Owning develops CEQA review and strategy plans early in the project planning phase and prepares project site constraints analyses. She has managed many controversial projects by maintaining thorough administrative records for projects that are anticipated to face legal challenges, leading response to comments for projects that have generated hundreds of public comments, and providing public agency support through project appeal hearings. Ms. Owning stays abreast of recent CEQA case law and changes to the State CEQA Guidelines and requirements through on-going education and participation in professional environmental planning groups and conferences. Ms. Owning also provides environmental compliance support through overseeing the implementation of mitigation monitoring and reporting programs throughout project construction.

City of Manteca Wastewater Quality Control Facility Sidestream Treatment and Ultraviolet Rehabilitation (2025). Principal Planner for the senior technical review of a Categorical Exemption prepared for the City of Manteca Wastewater Quality Control Facility (WQCF) Sidestream Treatment and Ultraviolet Rehabilitation Project in the City of Manteca, San Joaquin County. Role included identification of the appropriate CEQA documentation necessary for implementation of the proposed project and conducting senior technical review of the draft Categorical Exemption and supporting documentation prepared in-house. The proposed project includes the construction of a new sidestream facility, ultraviolet (UV) disinfection facility, and electrical building at the City's existing WQCF and is exempt per Class 1, 3, and 32 exemptions. Work performed for Carollo Engineers with the City of Manteca as the lead agency.

City of Manteca Wastewater Quality Control Facility Sludge Thickener and Dewatering Unit No. 3 (2024). Principal Planner for the senior technical review of a Categorical Exemption prepared for the City of Manteca WQCF Sludge Thickener and Dewatering Unit No. 3 Project in the City of Manteca, San Joaquin County. Role included identification of the appropriate CEQA documentation necessary for implementation of the proposed project and conducting senior technical review of the draft Categorical Exemption and supporting documentation prepared in-house. The proposed project includes the construction of improvements to the waste activated sludge (WAS) thickening and sludge dewatering systems at the City's existing WQCF and is exempt per Class 1, 2, 3, and 32 exemptions. Work performed for Carollo Engineers with the City of Manteca as the lead agency.

EDUCATION
Bachelor of Science,
Environmental
Economics & Policy;
Minor-City and Regional
Planning, University of
California, Berkeley,
2013
Geographic Information
System Certified, San
Francisco State
University, 2015

PROFESSIONAL

AFFILIATIONS
Association of
Environmental
Professionals
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Owning Resume | 2
City of Arvin Wastewater Treatment Facility Land Application Areas (2024). Principal Planner for the senior technical review of a Categorical Exemption prepared for the City of Arvin Wastewater Treatment Facility (WWTF) Land Application Areas Project in the City of Arvin, Kern County. Role included identification of the appropriate CEQA documentation necessary for implementation of the proposed project and conducting senior technical review of the draft Categorical Exemption and supporting documentation prepared in-house. The proposed project includes the land application discharge of wastewater from the WWTF onto two City-owned parcels and one privately-owned parcel located in close proximity to the existing WWTF. Work performed for Carollo Engineers with the City of Arvin as the lead agency.

Delta Water Treatment Plant Groundwater Recharge Basin (2024 - 2025). Project Manager for the preparation of an IS/MND tiered from the Stockton Delta Water Supply Project Program EIR and technical studies for the expansion of the Delta Water Treatment Plant’s (DWTP) capacity and the construction of three groundwater recharge basins on 45 acres. The future capacity of the DWTP is anticipated to expand from 30 million gallons per day (MGD) to 60 MGD to supply the groundwater recharge basins. Work performed as a subconsultant to Nexgen with the City of Stockton Municipal Utilities Department as the lead agency.

South Kern and Old River Municipal Water Companies Consolidation (2024 - 2025). Principal Planner for senior technical review of a CEQA IS/MND for the consolidation of South Kern and Old River Mutual Water Companies (MWCs) into the City of Bakersfield Water System Project. Due to uranium contamination, the proposed project includes the abandonment of two wells and extension of the City of Bakersfield’s water system to consolidate both MWCs. Role included senior technical review of the project description, administrative and public review drafts of the CEQA IS/MND as well as the supporting biological resources, cultural resources, air quality, greenhouse gas (GHG) emissions, energy, and noise evaluations prepared in-house. Work is being performed for Carollo Engineers with the City of Bakersfield as the lead agency.

Yuba City Aquifer Storage and Recovery Well System (2023 - 2025). Principal Planner/Project Manager for the preparation of a CEQA IS/MND and supporting biological resources, cultural resources, air quality/GHG emissions, and noise technical studies for the Aquifer Storage and Recovery (ASR) Well Project in the City of Yuba City. The City proposes to construct an ASR system with a new injection well and associated infrastructure at the Water Treatment Plant site to capture water when it is abundant, such as during a rainy season or spring snowmelt, and store water in an underground aquifer to allow for the recovery of that water when needed.

Work performed as a subconsultant to Carollo Engineers with the City of Yuba City as the lead agency.

Angels Camp Sewer Line Collection System Improvement & Replacement (2019 - 2020). Project Manager for preparation of an IS/MND and supporting biological resources, cultural resources, air quality/GHG/odor, and noise/vibration technical studies for a sewer line replacement project. The City is replacing and upsizing approximately 6,012 linear feet of deteriorating sewer line to allow the City’s wastewater treatment plant to operate at full capacity, thereby preventing wastewater spills into Angels Creek. Oversaw the preparation of an aquatic resources delineation report and 1602 Streambed Alteration Agreement from CDFW as the project will remove an existing pipe crossing and introduce a new pipe crossing over a tributary to Angels Creek. Work performed for the City of Angels Camp.

Folsom Boulevard Sewer Project (2019). Senior Environmental Planner for the preparation of a project description and Notice of Exemption form for the Folsom Boulevard Sewer Project. The project consisted of the construction and operation of a new sewer line that runs parallel and adjacent to the City of Folsom’s Trunk Sewer. The project was categorically exempt from environmental review under CEQA per Sections 15301(b) – Existing Facilities and 15303(d) – New Construction or Conversion of Small Structures. Work performed as a subconsultant to Water Works Engineers with the City of Folsom as the CEQA Lead Agency. 340
Mizutani Environmental: 07/2025

COURTNEY NICHOLSON MIZUTANI, PE

MIZUTANI ENVIRONMENTAL

EDUCATION
M.S.

Environmental/Agricultural &
Biological Engineering
Cornell University
B.S. Chemical Engineering
University of California, Davis
MBA Marketing
St. Mary’s College

REGISTRATION
Professional Engineer,
California
#C51068

PROFESSIONAL

AFFILIATIONS
Water Environment
Federation
California Water
Environment Association
American Society of Civil
Engineers

EXPERIENCE
Ms. Mizutani has over 35 years of engineering experience. Her primary area of expertise is regulatory, with an emphasis on air permitting and regulatory evaluations for municipal facilities across California, including San Joaquin Valley Air Pollution Control District, in addition to experiences in numerous other California air districts. Her other regulatory experiences include projects involving US Fish and Wildlife Service (USFWS), California Department of Fish and Game (DFG), Bay Conservation and Development
Commission (BCDC), Caltrans, the California Office of Emergency Services (OES), and the Federal Emergency Management Agency (FEMA).

Current Projects:

Supporting consultant to Bay Area Clean Water Agencies (BACWA) AIR Committee since 2016. Responsibilities include tracking and communicating regulatory issues; meeting regularly with BACWA AIR Committee representatives; and coordinating communication between POTWs and regulators, particularly Bay Area Air District.

Resolving a Notice of Violation for a wastewater facility with an existing unpermitted boiler. Work includes preparation of a permit application and coordinating with the facility’s staff, Air District permit engineer, and Air District inspector to resolve the NOV.

Providing ongoing, as-needed air regulatory support to the Palo Alto Regional Water Quality Control Plant, Central Contra Costa Sanitary District, Dublin San Ramon Services District, and the Central Marin Sanitation Agency. Work has included regulatory and technical support for permitting, review and preparation of regulatory correspondence, assistance with regulatory compliance, and other services as requested.

Preparing BAAQMD permit applications for facilities at the Dublin San Ramon Services District including aerated grit chamber, primary clarifiers, anerobic digester, two new flares to replace existing candlestick flare, a new FOG receiving station, and biogas treatment system. Assisting with reconciling BAAQMD permit discrepancies with currently operating sources.
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Mizutani Environmental: 07/2025
Selected Past Projects:

Completed the initial Clean Air Act Title V operating permit applications for the Cities of Bakersfield, Tulare, and Visalia. Permit applications included emission estimates for all significant emission sources, review of applicable regional and federal regulations, and documentation integral to the application. Prepared renewal application for Tulare’s Wastewater Treatment Plant. Subsequently, successfully assisted City of Visalia and the City of Tulare WWTP in efforts to be removed as a Title V facility for VOC emissions. Work included potential to emit calculations for priority pollutants and close coordination with SJVAPCD staff to facilitate the process.

Prepared Bay Area Air District permit applications for facilities at the Dublin San Ramon Services District including aerated grit chamber, primary clarifiers, anerobic digester, new flare to replace existing candlestick flare, a new FOG receiving station, and biogas treatment system. Assisting with reconciling BAAQMD permit discrepancies with currently operating sources.

Obtained Bay Area Air District permit for the Wet Weather Improvements and Digester Replacement projects at the South San Francisco/San Bruno Water Quality Control Plant (WQCP). Project elements include demolition of two digesters, construction of a single replacement digester, rehabilitation of a third digester, replacement of the existing boiler with two new boilers, and construction of a new secondary clarifier.

Obtained Bay Area Air District Authority to Construct for the City of Millbrae Water Pollution Control Plant’s cogeneration system. Also prepared permit application for existing odor control systems at the WPCP headworks and pump station.

Obtained Bay Area Air District Authority to Construct for installation of a new dual fuel cogeneration engine at Central Marin Sanitation Agency (CMSA). Work included Best Available Control Technology cost/benefit evaluation to meet Air District requirements.

Prepared Bay Area Air District permit applications for the Primary Treatment Facility project at the Sunnyvale Water Pollution Control Plant (WPCP). Work included new preliminary and primary treatment processes, standby generator, boiler replacement, and associated support facilities.

Obtained Bay Area Air Quality Management District Authorities to Construct for facilities at the City of Petaluma’s Ellis Creek Water Recycling Facility, Central Marin Sanitary District, City of Burlingame Wastewater Treatment Facility, South San Francisco Water Quality Control Plant, Fairfield-Suisun Sewer District, Union Sanitary District, City of Antioch, City of Martinez, and Richmond Wastewater Treatment Plant.
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carollo.com
343
VISALIA DIGESTER 9 DESIGN SERVICES
ODCs Total
Principal-in-Charge Project Manager Project Engineer Technical Advisor Lead Professional Professional Staff Professional Senior Designer DesignerDocument Processor Surveyor Geotechnical CEQA Air District Permitting $316 $294 $320 $364 $281 $249 $242 $226 $195 $157 Westwood BSK Helix Mizutani Task 1 Project Management 24 96 64 8 8 8 8 16 232 $67,888 $500 $68,388

1.1 Project Management and Meetings 24 96 64 8 8 8 8 16 232 $67,888 $500 $68,388 Task 2 Preliminary Design 8 96 272 64 96 120 420 64 200 24 1364 $356,816 $29,590 $17,600 $2,000 $406,006

2.1 Conduct Topographic Survey 16 16 8 40 $12,072 $29,590 $41,662

2.2 Conduct Geotechnical Investigation 16 16 8 40 $12,072 $17,600 $29,672

2.3 Preliminary Design 8 64 240 64 80 120 420 64 200 24 1284 $332,672 $2,000 $334,672 Task 3 Detailed Design 40 344 1160 104 520 600 2180 660 1800 128 7536 $1,866,168 $1,872,168

3.1 Develop 50% Design 16 120 420 40 200 240 800 240 800 32 2908 $714,120 $2,000 $716,120

3.2 Develop 90% Design 16 160 500 40 240 240 1000 320 800 64 3380 $834,224 $2,000 $836,224

3.3 Develop 100% Final Design Package 8 64 240 24 80 120 380 100 200 32 1248 $317,824 $2,000 $319,824 Task 4 Permitting 12 24 12 16 64 $20,072 $6,193 $21,780 $500 $48,545

4.1 CEQA Permitting 4 8 4 8 24 $7,440 $6,193 $13,633

4.2 SJVAPCD Permitting 8 16 8 8 40 $12,632 $21,780 $500 $34,912 Task 5 Bid Support 2 16 32 4 24 8 8 8 40 8 150 $38,568 $500 $39,068

5.1 Bid Support 2 16 32 4 24 8 8 8 40 8 150 $38,568 $500 $39,068 Task 6 Engineering Services During Construction 40 80 1000 96 416 520 3024 24 280 40 5520 $1,435,592 $4,000 $1,439,592

6.1 Project Management 40 80 120 $36,160 $36,160

6.2 Submittal Review 800 200 160 2000 40 3200 $842,320 $842,320

6.3 Request for Information Review 80 80 240 800 1200 $301,440 $301,440

6.4 Progress Meetings and Site Visits 40 16 24 40 80 200 $54,688 $4,000 $58,688

6.5 Change Order Review 32 40 64 24 160 $43,224 $43,224

6.6 Start Up and Commissioning Support 24 80 16 120 $41,296 $41,296

6.7 Record Drawings 16 40 40 24 280 400 $86,064 $86,064

6.8 Operations and Maintenance Manual 8 16 16 80 120 $30,400 $30,400 TOTAL 114 644 2552 288 1080 1256 5640 756 2320 216 14866 $3,785,104 $29,590 $17,600 $6,193 $21,780 $13,500 $3,873,767 Task
Number Task Description
Other
Direct
Costs
Total Base
Fee
Tasks
Carollo
Hours
Carollo Labor
Costs
Carollo Labor Subconsultants
344
VISALIA WRF DIGESTER

SCOPE OF SERVICES

1.0 Project Management

1.1 Project Management and Meetings
Carollo will provide project administration and management necessary to perform planning, execution, monitoring, and reporting of the project elements.

Carollo will lead monthly meetings with City staff and key project team members to provide updates on progress and address any issues or concerns.

Carollo will lead a kickoff meeting with the City and project team to review the scope and schedule. Project team will present and seek feedback on key design elements.

Deliverables:
• Monthly invoices and associated progress letter reports, including budget and schedule updates. • Kickoff and monthly meeting agendas and minutes.

Assumptions:
• The design phase of the project has a duration of $% months. • Kickoff meeting will include travel for three key expert team members to attend in person and other key project team members will attend remotely as necessary. • Monthly progress meetings will be held remotely and will be attended by the Project Manager, Project Engineer, and other key team members as necessary.

2.0 Preliminary Design

2.1 Conduct Topographic Survey
Carollo will contract with a subconsultant to provide surveying professional services. Surveying subconsultant will develop a topographic map of the proposed project site to serve as a base map for the design and to determine elevations of the existing surface and critical infrastructure. Ground control surveys will be performed and temporary benchmarks will be established at the project site. Mapping will be performed based on a specified horizontal and vertical datum. Carollo Senior Professionals will review the surveying deliverable for accuracy and incorporation into future design deliverables.

2.2 Conduct Geotechnical Investigation
Carollo will contract with a subconsultant to provide geotechnical professional services. Geotechnical consultant will perform borings onsite within the proposed project area and develop a draft and final report to determine site conditions and recommendations for the site grading and subgrade requirements. Senior Professionals will review the draft geotechnical report and provide feedback for incorporation into a final geotechnical report.
345

2.3 Preliminary Design
Carollo will conduct preliminary design to serve as the basis for developing the detailed design of the digester and ancillary facilities. The historical data analysis and future projections completed as part of the +,+% Master Plan will be used as the basis for sizing digestion facilities. The Digester - tank will be similar in size and configuration as Digester .. The preliminary design will include the following elements:
• Recommendation of equipment
o Digester - mixing system
o Digester - sludge heating system
o Boiler % type, capacity, and integration with existing hot water loop o Digester - digested sludge transfer pumps
o Digester - ferric chloride feed system
o Digester - features including cover type, gas equipment, manway access, and coating system
• Recommend digester feed and dewatering feed strategy for new Digester - and integration with Digester .
• Identify tie in locations for key utilities including primary sludge, thickened waste activated sludge, digested sludge, hot water return and supply, digester gas, ferric chloride, and electrical power. • Confirm MCC/boiler building type and approximate layout • Identify key project components and develop proposed layout • 3,% construction cost estimate
The project team will hold a Carollo C.A.M.P workshop with the City to present options and recommendations for the equipment configurations identified above. During the workshop, the project team and the City will discuss and make decisions for incorporation into the detailed design. The decisions made during the workshop will be documented in meeting minutes.

In addition, the preliminary design will include the following 3,% drawings:
• Design criteria and equipment sizing
• Overall site layout
• Process and instrumentation diagrams
Construction cost estimates will be prepared based on quantity takeoffs, estimating guides, equipment manufacturers’ quotes, and construction cost estimates of similar facilities. Contingencies for general estimating, general conditions, contractor overhead and profit, escalation to midpoint of construction, and annual cost escalation will be included in the construction cost estimate. The 3,% cost estimate is anticipated to be a Class % estimate as defined by the Association for the Advancement of Cost Engineering International, which has an expected accuracy between -3,% and +9,%.

Deliverables:
• Preliminary design C.A.M.P workshop meeting minutes (pdf) • Comment response log
• 3,% drawings
• 3,% construction cost estimate
Assumptions:
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• Digester - will be similar in size and configuration to the existing Digester . but will include piping modifications to be directly fed primary sludge and thickened waste activated sludge. • Digester . facilities, including feed and transfer piping, sludge heating, and sludge mixing, will not need to be modified.
• Primary sludge and thickened waste activated sludge pumping systems will not need to be modified.
• The existing ferric chloride storage and feed pump system will not need to be modified. • The existing hot water piping will not need to be rehabilitated.

3.0 Detailed Design

3.1 Develop 50% Design
Carollo will provide a 9, percent design submittal, which will include the following information:
• Design criteria
• Process flow diagram
• Site plan
• Paving and grading and yard piping plans
• Structural plans and sections for the digester, control building, and major equipment pads • Mechanical plans and sections for major equipment
• Electrical one-line diagram and electrical equipment elevations • Electrical site plans
• Process and instrumentation diagrams,
• Draft specifications for major mechanical equipment and equipment control descriptions Carollo will perform an internal quality control check of the 9,% design deliverable in parallel with the City’s review of the submittal.

Carollo will prepare a construction cost estimate based on the 9,% design drawings. Construction cost estimates will be prepared based on quantity takeoffs, estimating guides, equipment manufacturers’ quotes, and construction cost estimates of similar facilities. Contingencies for general estimating, general conditions, contractor overhead and profit, escalation to midpoint of construction, and annual cost escalation will be included in the construction cost estimate. The 9,% cost estimate is anticipated to be a Class 3 estimate as defined by the Association for the Advancement of Cost Engineering International, which has an expected accuracy between -+,% and +3,%.

Carollo will prepare for and lead a 9,% design review workshop to present progress on the design and discuss any feedback from the City. The workshop will include travel for three team members to attend in person and other key project team members will attend remotely as necessary.

In addition, Carollo shall also provide a response to all City review comments and shall provide the City with any potential construction cost increase estimates and gain City approval of additional costs prior to performing design modifications on that comment.

Deliverables:
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• 9,% design drawings (three hard copies at half-size, $$x$<) • 9,% design specifications (one hard copy)
• 9,% construction cost estimate
• 9,% design review workshop agenda and minutes.
• Comment response log
Assumptions:
• City will review 9,% deliverable and provide any feedback to be incorporated within three weeks of submittal
• The project will follow CSI MF-9 format utilizing Divisions ,$ through $<. • The project will follow Carollo’s CAD standards.

3.2 Develop 90% Design
Carollo shall provide a -,% design submittal, which shall be a complete set of contract documents.

Additionally, the -,% deliverable shall have incorporated applicable internal and City review comments from the 9,% design review. The -,% deliverable shall include all draft specifications required for the project. The City’s front-end specifications (Request for Bidders document) will be used for this project. The City’s front-end specifications will be reviewed by Carollo’s risk management to suggest changes to mitigate risk during bidding and construction. The front-end specs will be supplemented as necessary with Carollo’s specifications to provide a complete bidding backage. The project team will update the front-end specifications with project specific information.

Carollo will perform an internal quality control check of the -,% design deliverable in parallel with the City’s review of the submittal.

Carollo shall prepare a construction cost estimate based on the -,% design drawings. Construction cost estimates shall be prepared based on quantity takeoffs, estimating guides, equipment manufacturers’ quotes, and construction cost estimates of similar facilities. Contingencies for general estimating, general conditions, contractor overhead and profit, escalation to midpoint of construction, and annual cost escalation shall be included in the construction cost estimates. The -,% cost estimate is anticipated to be a Class + estimate as defined by the Association for the Advancement of Cost Engineering International, which has an expected accuracy between -$9% and ++,%.

Carollo will prepare for and lead a -,% design review workshop to present progress on the design and discuss any feedback from the City. The workshop will include travel for three team members to attend in person and other key project team members will attend remotely as necessary.

Deliverables:
• -,% design drawings (three hard copies at half-size, $$x$<) • -,% design specifications (three hard copies)
• -,% construction cost estimate
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• -,% design review workshop agenda and minutes.
• Comment response log
Assumptions:
• City will review -,% deliverable and provide any feedback to be incorporated within three weeks of submittal
• The project will not need to be approved through the City’s Building Safety Division • The City will provide their front-end specifications to be incorporated into the deliverable one month prior to the project team submitting the -,% deliverable.

3.3 Develop 100% Final Design Package
Carollo shall provide $,,% design drawings and specifications, suitable for bidding. The bid set deliverable shall have incorporated applicable internal and City review comments from the -,% design review.

Carollo will perform an internal quality control check of the $,,% design deliverable prior to submitting to the City. The $,,% design deliverable will be stamped and digitally signed by professional engineers registered in the state of California.

If no major project elements are added after the -,% design deliverable, the -,% construction cost estimate will serve as the engineer’s estimate for the basis of bidding. It will be discussed at the -,% design review workshop if there are review comments that warrant a change in the design and update to the construction cost estimate.

Deliverables:
• $,,% design drawings (pdf)
• $,,% design specifications (pdf)

4.0 Permitting
Carollo will assist the City in obtaining the necessary permit approvals from regulatory agencies in order to construct the digester and ancillary facilities. Carollo will respond to comments and make necessary revisions to design documents as required by the regulatory agencies. The anticipated permitting requirements include CEQA and San Joaquin Valley Air Pollution Control District approvals.

4.1 CEQA Permitting
The construction of a new digester and ancillary facilities is a project that is anticipated to trigger compliance with the California Environmental Quality Act (CEQA). It is anticipated that the project will apply for a Categorical Exemption. Carollo will hire a subconsultant to develop and submit the necessary applications.

Deliverables:
• Draft and Final Categorical Exemption application (pdf) Assumptions:
• City will pay for any filing or processing fees required for approval 349

4.2 SJVAPCD Permitting
The San Joaquin Air Pollution Control District (SJVAPCD) will need to issue an Authority to Construct for the digester improvements. Additionally, the new boiler will require completion of a supplemental form, Boilers, Steam Generators, Dryers, and Process Heaters. The boiler will be permitted to run on natural gas or digester gas to provide flexibility in future operations. Carollo will hire a subconsultant to develop and submit the necessary applications. The Authority to Construct won’t be able to be completed until during construction, because it requires input from the contractor to provide the make, model, and serial number for the specific unit that is to be installed at the site. Carollo and the subconsultant will develop a schedule with milestones to progress the permitting process so as to not be on the critical path for substantial completion of the construction project.

Deliverables:
• Draft and Final Authority to Construct application and supplemental boiler form (pdf) Assumptions:
• City will pay for any filing or processing fees required for approval • The new boiler will be less than 9., MMBTU/hr
• The new digester can tie in to the current digester gas pipeline network without any additional permitting requirements of the existing gas handling equipment. • The new boiler can tie in to the current hot water loop without any additional permitting requirements of the existing boilers.

5.0 Bid Support

5.1 Bid Support
Consultant will attend one pre-bid meeting for the prospective bidders on the City’s behalf.

During the bid period, Consultant will respond to questions from prospective bidders and provide written response. Verbal or written questions requiring clarification of the contract documents will be resolved by issuing addenda.

Deliverables:
• Response to bidder questions and updated drawings and specifications as necessary. • Conformed drawings incorporating changes by addenda following bidding (three hard copies of half-size ($$x$<) drawings and specifications)
Assumptions:
• The scope of work covers support for a single bid period. • Consultant will respond to B, bidders questions and update +, drawings and $, specifications. • The City will complete the following tasks:
o Manage printing, advertisement, and sale of contract documents during the bid period. o Issue bid packages to prospective bidders and maintain bid tabs. o Answer procedural questions from prospective bidders. o Compile and distribute addenda to prospective bidders. 350
o Open and tabulate bids.
o Issue Notice of Award and Notice to Proceed to successful bidders.

6.0 Engineering Services During Construction

6.1 Project Management
Carollo will provide project administration and management necessary to perform planning, execution, monitoring, and reporting of the project elements.

6.2 Submittal Review
Carollo will provide technical review of submittals and provide designation for approval or denial of project components. Submittals will be reviewed by the appropriate project and discipline engineers.

6.3 Request for Information Review
Carollo will provide technical review of requests for information and provide responses to resolve and provide direction to contractor’s questions during construction. RFIs will be reviewed by the appropriate project and discipline engineers.

6.4 Progress Meetings and Site Visits
Carollo will attend progress meetings remotely and on site led by the contractor and construction manager.

Carollo will engage in discussion, provide updates to outstanding submittals and RFIs, and work with the construction team to resolve issues.

6.5 Change Order Review and Design Changes
Carollo will support the construction manager in providing technical review to change orders requested by the contractor. Review may include providing justification to support approving or denying change orders based on field conditions and requirements in the contract documents. Carollo will also provide design changes as necessary to support modifications to the contract documents and provide direction to the contractor. Design changes may include issuing new drawings or specifications for incorporation into the project.

6.6 Start Up and Commissioning Support
Carollo will support the contractor’s commissioning coordinator by reviewing and providing feedback on startup and commissioning plans. Carollo will provide on site and remote support during critical commissioning phasing to ensure plant staff are receiving adequate training, equipment meets testing requirements, and digester meets performance standards.

6.7 Record Drawings
Carollo will provide final record drawings for documentation that revise the bid set drawings to include changes made during construction.
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6.8 Operations and Maintenance Manual
Carollo will incorporate approved submittals from the contractor into an O&M manual to document equipment information and processes added or modified as part of this project. The O&M manual serves as a guiding document for plant staff to provide a process overview and understanding, troubleshoot equipment and processes, and outline equipment maintenance requirements.

Deliverables:
• Monthly invoices and associated progress letter reports • RFI responses
• Design clarifications, as needed
• Submittal and resubmittal review responses
• Change order request review comments
• O&M manual (three bound hard copies)
• Record drawings (one hard copy, full size ++x3%)
Assumptions:
• Attending bi-weekly construction progress meetings including site visits and observation by design engineers to support construction work (+9 online and +9 in-person) • Response to requests for information (RFIs) (up to $9,) • Provision of design clarifications as needed (up to $,) • Submittal review (up to 3B, and $., resubmittals)
• Assistance in review of change orders (up to $,)
• ESDC will last for the duration of construction, which will be +%-months. • The City will contract with another firm to provide construction management of the project. 352
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CITY OF VISALIA, CA

REQUEST FOR PROPOSALS
RFP NO. 24-25-07
Professional Services to Design
Digester 9 at Visalia’s Water Reclamation Facility (WRF)

DESCRIPTION:

The City of Visalia is seeking bids from qualified engineering firms to design a new digester and associated pumps, piping, recirculation, and heating equipment at the Visalia Water Reclamation Facility (WRF).

MANDATORY PROPOSER CONFERENCE:

Mandatory conferences have been scheduled for this project. Interested proposers must attend at least one of the mandatory conferences to be considered an eligible proposer. These meetings will be held at the Visalia Water Reclamation Facility (7579 Ave. 288, Visalia, CA) as follows:

Tuesday, June 24, 2025 at 9:00am and
Thursday, June 26, 2025 at 9:00am.

SUBMITTAL DEADLINE:

One (1) unbound original, three (3) copies and one electronic copy on USB drive must be received no later than:
3:00pm on Thursday, July 17, 2025. Proposals received after the time and date stated above shall be returned unopened to the proposer.

SUBMITTAL INSTRUCTIONS:

Addressed to: Purchasing Division
707 W. Acequia Avenue, Visalia, CA 93291
From: Proposer’s Name & Mailing Address
Mark envelope: RFP No. 24-25-07
Design Services for Visalia’s Water Reclamation Facility Digester 9 Delivery of Proposals: When sending a proposal via Fed Ex, UPS, etc., it is the responsibility of the Proposer to ensure that submittal is received during open office hours. Office Hours are 7:30am – 5:00pm Monday through Thursday.

We are closed on Fridays and major holidays. Bids are not delivered or received when office is closed.

The City utilizes an outside service for delivery and sorting incoming mail, and therefore, mailing a bid/proposal via U.S. Mail is not recommended as there could be a delay in receiving by the deadline. Proposals must be received prior to the deadline. The City will not accept a postmark as evidence of delivery. 353
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INQUIRIES:

Questions/clarification of this bid document should be addressed to the Purchasing Division (559) 713-4334. To prevent miscommunications, the Purchasing Department prefers that all questions regarding the specifications or scope of services be submitted in writing via email to [email protected]. Questions may be asked at any time prior to, but no later than Thursday, July 3, 2025.
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CITY OF VISALIA, CALIFORNIA

REQUEST FOR PROPOSALS
RFP 24-25-07
SEALED PROPOSALS will be received by the Visalia Purchasing Division until 3:00pm. on Thursday, July 17, 2025, for Professional Services to Design Digester 9 at Visalia’s Water Reclamation Facility.

Mandatory proposal conferences have been scheduled for this project. Interested proposers must attend at least one of the mandatory conferences to be considered an eligible Proposer. These meetings will be held at the Visalia Water Reclamation Facility (7579 Ave. 288, Visalia, CA) as follows:

Tuesday, June 24, 2025 at 9:00am and
Thursday, June 26, 2025 at 9:00am.

Contract documents may be obtained by calling (559) 713-4334, emailing your request to [email protected] or may be downloaded from registered users of BidNetDirect. Instructions for registering with BidNetDirect can be found on our website at visaliapurchasing.org.

This is a public works design project which is subject to registration with the California Department of Industrial Relations, payment of State Prevailng wages, monitoring by the Labor Commissioner and other requirements as listed in the City’s Labor Compliance Manual. All Consultants and subconsultants listed in proposal or performing work on the project must have valid registration with the California Department of Industrial Relations (DIR). Any labor performed which has a designated prevailing wage rate including but not limited to: surveying, staking, testing, etc. must be paid at minimum, the State Prevailing Wage rate. Consultants will be responsible for uploading certified payrolls to the Labor Commissioner.

Consultant is to be licensed Engineer, in accordance with the California Business and Professions Code and is to possess current professional registration and be licensed to perform work in the State of California.

The City hereby affirmatively ensures that Minority Business Enterprises and Disadvantaged Business Enterprises (DBE) will be afforded full opportunity to submit proposals in response to this notice. Individuals and/or entities submitting bids/proposals to the City of Visalia will not be discriminated against on the basis of age, race, religion, creed, color, national origin, ancestry, physical or mental disability, medical condition, genetic information, marital status, gender, gender identity or expression, sexual orientation, or military and veteran status in any consideration leading to the award of contract.

The right is reserved by the City of Visalia to reject any or all proposals, to waive any irregularities or informalities not affected by law, to evaluate the proposals submitted and to award the contract according to the proposal which best serves the interests of said City.

Publication Dates: 6/13/25 & 6/18/25
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TABLE OF CONTENTS

TITLE PAGES
I. Definitions........................................................................................................................... 1 II. Introduction........................................................................................................................ 1 A. Information............................................................................................................ 1 B. Background............................................................................................................ 2 C. Purpose and Objective........................................................................................... 2 D. RFP/Agreement Schedule...................................................................................... 3 III. Scope of Services................................................................................................................ 3 A. Services of the Consultant..................................................................................... 3 B. City Responsibilities............................................................................................... 4 IV. Proposal Content and Format Requirements..................................................................... 4 A. General Information .............................................................................................. 4 B. Proposal Project Approach .................................................................................... 5 C. Staff Qualifications and Related Experience.......................................................... 5 D. Proposed Fee Structure and Schedules................................................................. 6 E. Conflict of Interest................................................................................................. 6 V. Consultant Selection Procedure ......................................................................................... 6 A. Criteria & Weight of Criteria.................................................................................. 7 B. Background Check ................................................................................................. 7 C. Award of Contract.................................................................................................. 7 VI. Examination of Contract Requirements & Acceptance of Proposal Content..................... 8 A. Withdrawal of Proposals ....................................................................................... 8 B. Rejection of Proposals........................................................................................... 8 C. Evaluation/Award of Contract............................................................................... 9 VII. Measurement & Payment.................................................................................................. 9 A. Billing & Payments................................................................................................. 9 VIII. General Conditions.......................................................................................................... 10 A. Important Notice ................................................................................................. 10 B. Legal Responsibilities........................................................................................... 10 C. Permits and Licenses ........................................................................................... 10 D. Insurance ............................................................................................................. 10 E. Assignment of Contract....................................................................................... 12 F. Documents/Data.................................................................................................. 12 G. Termination of Contract ...................................................................................... 12 H. Right To Require Performance ............................................................................ 14 I. Ethics in Public Contracting ................................................................................. 14 J. Independent Contractor...................................................................................... 14 K. Equal Employment Opportunity.......................................................................... 14 L. Venue................................................................................................................... 14 M. Proprietary Information....................................................................................... 14 N. Incurring Costs..................................................................................................... 15 O. Executive Order N-6-22, Russian Sanctions......................................................... 15 Attachments:

Non-Collusion Affidavit
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Workers Compensation Insurance Certificate
Equal Employment Opportunity Compliance Certificate
Disclosure Forms
Americans with Disabilities Act Compliance Certificate
Drug-Free Workplace Certificate
Iran Contracting Act Compliance
Sample Professional Services Agreement
City of Visalia Labor Compliance Manual (separately attached) 357
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I. DEFINITIONS
For the purposes of this RFP NO. 24-25-07, the following terms shall have the meanings indicated:

1. “City” means the City of Visalia

2. “City Council” means the Council of the City of Visalia

3. "Bidder", "Vendor", "Supplier", “Consultant”, “Contractor” and “Subrecipient” are used interchangeably throughout this invitation to mean the person, firm, or corporation or other entity submitting a Bid in response to the Request for Bid.

4. “Bid” and “Proposal” are used interchangeably to mean an individual’s or entity’s offer in response to this Request for Proposal.

5. “RFP” means Request for Proposal No. 24-25-07.

II. INTRODUCTION
A. Information
The City of Visalia is seeking bids from qualified engineering firms to design a new digester and associated pumps, piping, recirculation, and heating equipment at the Visalia Water Reclamation Facility, 7579 Ave. 288, Visalia, CA.

The project will involve the design of a fixed cover structure built from reinforced concrete, meeting the specifications detailed below.

Digester 9 will have the following specifications and requirements:
• Diameter: 116 feet
• Side Water Depth: 24.5 feet
• Sludge Digestion Depth: 17.5 feet
• Sludge Storage Depth: 7 feet
• Digester Cone Depth: 11 feet
• Operating Volume: 258,930 cubic feet (excluding cone depth) • Sludge Digestion Volume: 184,950 cubic feet
• Sludge Storage Volume: 73,980 cubic feet
• Total Tank Volume, each: 297,700 cubic feet
The design of Digester 9 and associated structures should match the design of Digester 8 at the Visalia Water Reclamation Facility, including associated pumps, valves, and heat exchangers. The location should match the proposed area outlined in TM 4 of Carollo’s Facility Plan.

Tuesday, June 24, 2025 at 9:00am and
Thursday, June 26, 2025 at 9:00am.

One (1) unbound original, three (3) copies and one (1) electronic copy on USB Drive must be received no later than 3:00pm on Thursday, July 17, 2025. Proposals received after that date and time will be returned unopened to the proposer.

This Request for Proposals is being issued by the City of Visalia Purchasing Department. Unless otherwise directed, all communications regarding this Request for Proposals should be directed to the Purchasing Division at (559) 713- 358
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4334. To prevent misinterpretations, the Purchasing Division would prefer that all questions regarding specifications or scope of services be sent by email to [email protected] Any revisions to the Request for Proposals will be issued and distributed as addenda. Proposers are specifically directed not to contact any other City personnel for meetings, conferences or technical discussions related to this Request for Proposal. Failure to adhere to this policy may be grounds for rejection of proposals.

B. Background
In 2018, the Visalia Water Reclamation Facility (WRF) underwent a substantial upgrade, enhancing its treatment and disinfection capacity to 22 million gallons per day (MGD). Water conservation efforts within the City and increased loadings have significantly impacted the factors used to calculate the WRF’s capacity. The maintenance and operations staff at the WRF began noticing the adverse effects of these increased loadings in the last few years.

Carollo Engineers was brought in under an emergency contract to perform a condition assessment and prepare a facility plan which would address the WRF’s near-term solids handling needs. Among the proposed projects, is the construction of a Digester 9, which matches the design specifications for Digester 8, as outlined in the Technical Specifications prepared by Parsons in 2013 for the 2018 Upgrade.

C. Purpose, Objective and Services to be Provided.

The City of Visalia is issuing this Request for Proposals to retain a qualified engineering firm to support the ongoing development of the Visalia Water Reclamation Facility (WRF) in response to increased solids loadings and changing operational demands. Since completing a major upgrade in 2018 that expanded the facility’s treatment and disinfection capacity to 22 million gallons per day (MGD), the City has observed performance impacts caused by increased influent loadings. To address near-term capacity and solids handling challenges, the City seeks to construct a new anaerobic digester (Digester 9) to supplement existing infrastructure.

The selected consultant will lead the design of Digester 9 and associated systems, ensuring consistency with existing infrastructure—particularly Digester 8—and compliance with relevant standards and specifications. This project is essential to maintaining reliable wastewater treatment operations and long-term service to the community.

Project Objectives
• Address current and anticipated solids handling demands at the Visalia WRF through the addition of a new anaerobic digester.
• Design Digester 9 in alignment with the specifications of Digester 8, ensuring seamless integration with existing systems.
• Improve the facility’s capacity, reliability, and operational efficiency to support continued community growth and water conservation efforts.
• Assist the City in maintaining regulatory compliance and minimizing operational disruptions due to overloading conditions.
• Ensure all project components are designed to be cost-effective, durable, and maintainable by City staff.

Services to be Provided
• Lead the full design process for Digester 9, including all structural, mechanical, electrical, and process components.
• Provide engineering analysis and design solutions consistent with previous facility improvements and Carollo Engineers’ Facility Plan.
• Support the City throughout the design process with regular meetings, workshops, and technical coordination.
• Assist in securing necessary regulatory approvals through permit support and design documentation. • Provide technical guidance during construction and commissioning to ensure successful implementation of the new digester and associated systems.
• Deliver training and operational documentation to support City staff in managing the new infrastructure. 359
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D. RFP/Agreement Schedule
Event Date of Event
RFP Available to the public...................................................................................................... 6/9/25 Mandatory Proposer Conferences at 7579 Ave. 288, Visalia, CA, 9:00am..........6/24/25 & 6/26/25 Questions Deadline ................................................................................................................. 7/3/25 RFP due at 3:00 pm at 707 W Acequia Ave. Visalia, CA 93291 .......................................... 7/17/25 Short list established and consultants notified....................................................................... 7/25/25 Interviews/Presentations with short-listed consultants (if needed)............................................... tbd Award of Contract @ City Council Meeting .................................................................................. tbd Contract Begins ............................................................................................................................ tbd Final date for all work to be completed .................................................................................... 6/1/26 Italicized items and dates are at the City’s option. The City reserves the right to award contract solely on the basis of proposal content.

III. SCOPE OF SERVICES
A. Services of the Consultant
The City of Visalia will require a consultant to perform the following tasks for the project.

1. Preliminary Design Phase:
o Conduct a detailed site assessment to confirm existing conditions and gather necessary data. o Develop a preliminary design for Digester 9, ensuring compliance with all relevant codes and standards.
o Prepare a preliminary cost estimate for the project.

2. Final Design Phase:
o Develop detailed design drawings and specifications for the digester and associated equipment, including:
▪ Construction of a new digester: Design a fixed cover structure built from reinforced concrete.
▪ Digester mixing system: Include a mixing pump and associated piping, valves, and appurtenances.
▪ Digester heating system: Incorporate a sludge recirculation pump, hot water pump, heat exchanger, and associated piping, valves, and appurtenances. ▪ Digester feed transfer pumps: Design and specify associated piping, valves, and appurtenances.
▪ Yard piping: Design for digester feed, digested sludge, hot water return/supply, and digester gas.
▪ New electrical and boiler building: Include a new boiler to expand the capacity of the main hot water loop and a new Motor Control Center (MCC) to power all equipment associated with this project.
o Ensure designs include all necessary connections to existing plant infrastructure. o Provide structural calculations and analysis to support the design. o Submit 50% and 90% plans and specifications for review and approval by the City of Visalia. o Prepare a final cost estimate for the project.

3. Permitting and Approvals:
o Assist the City of Visalia in obtaining all necessary permits and approvals from regulatory agencies. 360
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o Respond to comments and make necessary revisions to design documents as required by permitting agencies.

4. Construction Support Services:
o Provide construction administration services, including reviewing submittals, responding to requests for information (RFIs), and conducting periodic site visits to ensure compliance with design documents.
o Assist with the commissioning and startup of Digester 9 and associated equipment. o Provide training for City staff on the operation and maintenance of Digester 9.

5. Meetings and Workshops:
o Conduct monthly meetings with City staff to update on progress and address any issues or concerns. o Conduct Workshops at each design level (50%, 90%, and 100%). o Provide detailed progress reports at each meeting and workshop.

6. Deliverables
o Preliminary design report and cost estimate
o 50%, 90%, and final design drawings and specifications o Structural calculations and analysis
o Permit applications and documentation
o Construction support documentation, including submittal reviews and RFI responses o Commissioning and training documentation
o Monthly progress reports, including budget and schedule updates. Meeting agendas and minutes. (All provided in PDF format).

7. Schedule
The project is expected to be completed within 9 months. The contractor will be required to submit a detailed project schedule within 2 weeks of the contract award, outlining key milestones and deliverable dates.

B. City Responsibilities
• Compensate the consultant as provided in the contract agreement. • Provide a "City Representative" who will represent the City and who will work with the consultant in carrying out the provisions of the RFP. The Consultant shall communicate with the City representative who will provide the following services:
• Examine documents submitted to the City by the Consultant and timely render decisions pertaining thereto. • Give reasonably prompt consideration to all matters submitted by the Consultant for approval to the end that there will be no substantial delays in the Consultant's program of work.

IV. PROPOSAL CONTENT AND FORMAT REQUIREMENTS
The following are proposal requirements. Respondents are requested to organize their proposal into sections with tabs corresponding to the listed selection criteria as follows. You must answer the following questions in the same sequence as below. A screening committee will evaluate the completeness of the response to the RFP.

A. General Information
• Firm name, address, telephone number, fax number and email address. • Account Representative or other person to contact for clarification of any item contained in the proposal. Include telephone number, fax number and email address if different from above. 361
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• Specify type of organization (individual, partnership or corporation) and if applicable indicate whether you are:
a. Small Business.
b. Disadvantaged Business.
c. Minority and/or Women-Owned Business.
• Provide your Federal Tax ID Number and City of Visalia Business Tax Certificate Number. • Names of company’s owners / officers.
• Personnel of the Proposer’s Firm must be identified in the proposal with their background and the firm must give assurances of continuity of its personnel. A contact person needs to be identified. • Provide surety information for all sureties – General and Automobile Liability, E/O and Worker’s Compensation. • References and Referrals
• Completed and signed forms included with this RFP (pgs. 16-22) B. Proposed Program Approach
Summarize your approach and understanding of the program and any special considerations of which the City of Visalia should be aware. Indicate clearly, the levels of participation you will expect from City of Visalia staff in the fulfillment of the contract. The contents of this section shall be determined by the proposer but should demonstrate an understanding of the special characteristics of the project.

This section shall outline the proposed approach to the project. This approach or scope of work shall consist of:
• Phase
• Objective(s)
• Task(s) and brief description
• Work products
• Meeting(s)
• Completion date
Exceptions to the requirements of the RFP should be clearly delineated in this section.

While the City believes this RFP provides the necessary direction for the Consultant to provide a proposal to complete the services, the City understands that there may be additional items the Consultant may discover during the development of their proposal. The Consultant is encouraged to include/address any items that they feel the City has omitted in error or that should be included as part of the services to complete this project. All proposer’s may include a maximum of two (2) pages of information not included, nor requested in this RFP, if you feel it may be useful and applicable to this project.

The information in this section will aid the City in the refinement of the scope of work during contract negotiations.

C. Staff Qualifications and Related Experience

1. Staff Qualifications and Experience
This section should demonstrate the qualifications of all professional personnel to be assigned to this project by providing resumes/experience summaries describing their education, credentials, related experience and their proposed roles for this contract. Note: Consultant may not substitute any member of the project team without prior written approval of the City.

2. Related Experience
Include descriptive information concerning the experience of the firm. Include information about previous projects that might be comparable, including the size and type of projects and the scope of services provided. In addition, provide references for the three (3) most comparable projects for which your firm has provided, or currently is providing, similar services.
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List the projects in reverse chronological order and provide the following information for each project:

Indicate for each of these projects:
• Name of project
• Project location
• Brief description (type of construction, functional components, special design considerations) • Name of owner
• Name of owner's contact person and telephone number (contact person, who, at the time of RFP submittal, will be employed by the owner)
• Your firm's specific involvement (i.e., engineer, subconsultant, etc.) • Proposed cost vs. actual cost
• Status of completion
D. Proposed Fee Structure
The Proposed Fee Structure shall be provided under separate, sealed cover as a part of the RFP submittal with the “original, unbound” copy of respondent’s proposal and shall be included on the USB drive in a separate folder marked “fees”. Do not include fees in the three (3) copies of the proposal.

Provide proposed fees and cost information and recommend a budget plan for all services to be provided in the following format:
• Proposers should review the requirements of this RFP and address all services in this fee schedule that might reasonably be expected to support the project. Indicate how the City will be invoiced for services, i.e., unit or hourly costs. This information should be detailed and broken down by road segment and intersection including units of work or other applicable measure. Proposers should endeavor to provide a comprehensive, fee schedule, as the City will not include compensation in the contract for items not addressed. • Include a total cost to provide services, based on the consultant’s fee schedule and the scope of work as outlined in this RFP. This cost will be used as a basis for negotiations.

The fee proposal (submitted under separate, sealed cover) along with the proposed project approach, will be used as a basis for any contract negotiations. The actual scope of services and fees included in the contract may be negotiated and may vary to satisfy the City’s actual needs.

E. Conflict of Interest
• Disclose any financial, business or other relationship with the City or any member of the City staff that may have an impact on the outcome of the project.
• List current clients who may have a financial interest in the outcome of the project.

V. CONSULTANT SELECTION PROCEDURE
Selection of the successful proposal shall be generally based on the information provided by the Vendors in response to the Request for Proposals and any subsequent interviews that may be conducted. Consultant interviews will be held solely at the option and discretion of the City of Visalia. The process for selection shall occur in the following sequence:
• Review Proposals
• Establish a “short list” of three or more firms
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• Interview “short-listed” firms (at the option and discretion of the City) • Identify best qualified firm
• Determine which, if any, alternates will be selected, and negotiate a fee • Award contract
A project Selection Committee, as deemed necessary, will be formed to evaluate the proposals and to make recommendation to the Visalia City Council. This committee may consist of representatives of the user department, members of the community, members of the Council and may include a representative knowledgeable in water reclamation facility engineering planning and design. Composition and creation of this committee, should one be formed, is at the sole discretion of the City. Names of the Committee members, should one be formed, will not be released prior to the time for interviews.

The Committee will review the proposals for format to ensure conformance with the requirements of the RFP and may select finalists to interview with the Committee as a part of the Committee's evaluation process. The City does not guarantee that an interview will take place, thus reserving the right to select a contractor based solely on the information provided in the proposals received in response to the RFP. Should an interview take place, the key personnel responsible for fulfilling the requirements of the project shall be required to be present for the interview.

A. Criteria
The Committee will address the following criteria in evaluation of proposals in order to gauge the ability of a contractor to perform the contract as specified. The same general criteria will be used to judge both the proposal and the presentation, should the City choose to conduct interviews with short-listed firms.

Criteria Explanation Weight
Merit of Proposals Submittal /
Presentation
• Proposals submittal thoroughness 15
Knowledge and Expertise of
Personnel/Firm
• Capability of personnel
• Firm qualifications
• Adequacy of Staff to perform the work
• Firms’ expertise demonstrated by examples of
similarly completed plans.
25 Understanding of Project • Knowledge of project, requirements 20 Timeline • Ability to meet City schedule 20
Record of Past Performance • References
• Ability to work effectively with City staff, other
public agencies and related parties.
• Demonstrated ability to complete work tasks
within project timelines and budget.
• Any design recognition
20 Total Points Possible 100
Prior to the award of contract, the City must be assured that the proposer selected has all of the resources required to successfully perform under the contract. This includes, but is not limited to, personnel with the skills required, equipment/materials and financial resources sufficient to provide services called for under this contract. If, during the evaluation process, the City is unable to assure itself of the proposer’s ability to perform under the contract, if awarded, the City has the option of requesting from the proposer, any information that the City deems necessary to determine the proposer’s capabilities. If such information is required, the proposer will be notified and will be permitted seven (7) working days to submit the requested information. 364
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B. Background Check
The City reserves the right to conduct a background inquiry of each proposer which may include the collection of appropriate criminal history information, contractual and business associations and practices, employment histories and reputation in the business community. By submitting a proposal to the City, the proposer consents to such an inquiry and agrees to make available to the City such books and records as the City deems necessary to conduct the inquiry.

C. Award of Contract
The successful firm will be required to execute a contract with the City of Visalia. A Draft Agreement has been included in this RFP to alert proposer’s to the provisions generally found in City contracts. The Draft Agreement may be altered from the enclosed form at the discretion of the City and without notice to consultant prior to award of contract. The City does not guarantee that the Final Agreement will duplicate the enclosed Draft Agreement.

VI. EXAMINATION OF CONTRACT REQUIREMENTS AND ACCEPTANCE OF

PROPOSAL CONTENT
Before submitting a proposal, proposer’s must satisfy themselves by personal examination of the proposal requirements and other contract documents, and by any other means as they may believe necessary, as to the actual conditions, requirements, and difficulties under which the work must be performed and to verify any representations made by the City of Visalia, upon which the offeror will rely.

The submission of a proposal shall be considered conclusive evidence that the proposer has carefully investigated all conditions that affect, or may at some future date affect, the performance of services covered by this solicitation, and is satisfied as to the character, quality, and quantities of work to be performed and as to the requirements of the proposal. Submission of a proposal shall also be evidence that the proposer is familiar with directives that in any way affect prosecution of the work or persons engaged or employed in the work.

No proposer shall at any time after submission of a proposal make any claim or assertion that there was any misunderstanding or lack of information regarding the nature or amount of work necessary for satisfactory performance under the contract. If the proposer receives an award as a result of this Request for Proposals, failure to have made such investigations and examinations will in no way relieve the proposer from its obligations to comply in every detail with all provisions and requirements of the contract documents, nor will a plea of ignorance of such conditions and requirements be accepted as a basis for claim whatsoever by the proposer for additional compensation. Any errors, omissions, or discrepancies found in the specifications or other contract documents shall be called to the attention of the City and clarified prior to the submission of proposals.

Should the proposer feel there has been a supplemental or oral modification, it shall be his responsibility to verify said modification in writing prior to submission of the proposal.

The contents of the proposal of the successful proposer shall become contractual obligations if procurement action ensues. Failure to accept these obligations in a contractual agreement shall result in cancellation of award.

A. Withdrawal of Proposals
Any proposal may be withdrawn at any time prior to the time fixed in the public notice for the receipt of proposals, only by written request for the withdrawal of the proposal filed with the Purchasing Division. The request shall be executed by the proposer or his duly authorized representative. The withdrawal of a proposal does not prejudice the right of the proposer to file a new proposal. No proposal may be withdrawn after the time fixed in the public notice for the receipt of proposals.

B. Rejection of Proposals
The City of Visalia reserves the right to reject any or all proposals; to waive any requirements, both the City's and those proposed by the vendor; to waive any irregularities or informalities in any proposal or the RFP process when it 365
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is in the best interest of the City to do so; to negotiate for the modification of any proposal with mutual consent of the proposer; to re-advertise for proposals, if desired; to sit and act as sole judge of the merit and qualifications of the service offered and; to evaluate in its absolute discretion, the proposal of each vendor, so as to select the vendor which best serves the requirements of the City, thus insuring that the best interest of the City will be served.

Proposer’s past performance and the City's assurance that each proposer will provide service as proposal, will be taken into consideration when proposals are being evaluated.

The City may make such investigation as it deems necessary to determine the ability of a proposer to furnish the required services, and the proposer will furnish to the City all such information and data for this purpose as the City may request. The City reserves the right to reject any proposal if the evidence submitted by, or investigation of, such proposer fails to satisfy the City that such proposer is properly qualified to carry out the obligations of a contract and to deliver the services contemplated herein or; the proposal of any proposer who has previously failed to perform properly, or complete on time, contracts of a similar nature. Any material misrepresentation or material falsification of information provided to the City in the proposer’s proposal submission, or at any point in the proposal evaluation process, including any interview conducted, is grounds for rejection of the proposal. In the event that the misrepresentation or falsification is not discovered until after any agreement is awarded, the agreement may be terminated at that time. A determination as to whether a misrepresentation or falsification of the proposal submission is material shall be made solely in the exercise of the City’s sound discretion. The City expressly reserves the right to reject the proposal of any proposer who is in default on the payment of taxes, licenses or other moneys due to the City of Visalia.

C. Evaluation/Award of Contract
Evaluation and selection of proposals will be based on the information called for in this RFP. Brochures or other promotional presentations beyond that sufficient to submit a complete and effective proposal are not desired.

Elaborate artwork, expensive paper or binders, and expensive visuals are not necessary.

Proposals will be evaluated by a Selection Committee. The City reserves the right to make the selection of a proposer based on any or all factors of value, whether quantitatively identifiable or not, including, but not limited to, the anticipated initiative and ability of the proposer to perform the services set forth herein.

The award, if made, will be made within ninety (90) days from proposal closing date. Proposer agrees and so stipulates in submitting this proposal, as though stated therein, and in any subsequent award of contract that:

1. Contract, should it be awarded, shall be interpreted, construed, and given effect in all respects according to the laws of the State of California.

2. Should proposer be awarded contract, proposer shall not assign contract, or any part thereof, or any moneys due or to become due thereunder, without prior consent of the City.

3. Proposer shall indemnify and hold harmless the City, its officers, officials, employees, and agents from and against all claims, damages, losses, and expenses caused in whole or in part by any negligent act or omission of the proposer, its consultants, subcontractor, anyone directly or indirectly employed by any of them, or anyone for whose acts any of them may be liable, except where caused by the active negligence, sole negligence, or willful misconduct by the City.

4. Proposer shall hold the City harmless from liability of any nature or kind, including cost and expenses for infringement or use of any copyrighted composition, secret process, patented or unpatented invention, article or appliance furnished or used in connection with the contract.

5. Proposer shall hold the City harmless from liability of any nature or kind, including cost and expenses for infringement or use of any copyrighted composition, secret process, patented or unpatented invention, article or appliance furnished or used in connection with the contract.

6. Proposer warrants that no gratuities, in the form of gifts, entertainment, or otherwise, were offered or given by the proposer, to any officer or employee of the City with a view toward securing the contract or securing 366
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favorable treatment with respect to any determination concerning the performance of the contract. For breach or violation of this warranty, the City shall have the right to terminate the contract, either in whole or in part. The rights and remedies of the City provided in this clause shall not be exclusive, and are in addition to any other rights and remedies provided by law or under the contract.

VII. MEASUREMENT AND PAYMENT
A. Billing and Payments
Vendor is fully responsible for assuring that all services arising from the agreement are billed the correct and applicable contract rate. The vendor is required to establish and maintain a process to monitor its billing practices and will refund all over-charges that may occur.

In connection with any cash discount offered, time will be computed from the date of complete delivery of the service as specified, or from the date correct invoices are received, if that date is later than the date of delivery. For the purposes of earning the discount, payment is deemed to be made on the date of the mailing of the City check.

VIII. GENERAL CONDITIONS
A. Important Notice
The City of Visalia will not be responsible for oral interpretations given by any City employee, representative, or others. Proposer’s are cautioned that any statements made that materially change any portion of the proposal documents shall not be relied upon unless subsequently ratified by a formal written amendment to the proposal document. The issuance of a written addendum is the only official method whereby interpretation, clarification, or additional information can be given. If any addenda are issued to this Request for Proposals, the City will attempt to notify all prospective vendors who have secured same. However, it will be the responsibility of each vendor, prior to submitting their proposal, to contact the Purchasing Division, located at 707 W. Acequia, Visalia, CA 93291, (559) 713-4334 to determine if addendums were issued and to make such addendum a part of the proposal.

B. Legal Responsibilities
All proposals must be submitted, filed, made, and executed in accordance with State of California and Federal laws relating to proposals for contracts of this nature whether the same or expressly referred to herein or not. By submitting a proposal, Consultant certifies that he or she will comply with all Federal laws and requirements, including but not limited to Equal Employment Opportunity, Disadvantaged Business Enterprise, Labor Protection and other laws and regulations.

C. Permits and Licenses

1. Business License Certificate
Possession of a City of Visalia Business Tax Certificate is not required to submit a proposal in response to this invitation or if your business is located outside of city limits. However, Contractor shall be required to possess, at his/her own expense, a valid and current City of Visalia Business Tax Certificate, prior to commencing work if located inside city limits. Fee is based on gross receipts for all business transactions in the City of Visalia. For additional information, contact the City of Visalia at (559) 713-4326.

2. Professional License
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Consultant is to be licensed in accordance with the California Business and Professions Code and is to possess current professional registration and be licensed to perform work in the State of California.

3. Permits
Consultant shall be required to obtain and maintain at his/her own expense, any and all permits, licenses and certifications issued by any federal, state or local governmental agency, pertaining to, and necessary for providing the services required in this Request for Proposals.

D. Insurance
Indemnification and Insurance
As respects acts, errors, or omissions in the performance of services, VENDOR agrees to indemnify and hold harmless CITY, its elected and appointed officers, employees, and CITY designated volunteers from and against any and all claims, demands, losses, defense costs, liability or consequential damages arising directly out of Vendor’s negligent acts, errors or omissions in the performance of his/her services under the terms of this Agreement; except to the extent those arise out of the negligence of CITY.

CITY agrees to indemnify and hold harmless VENDOR, its officers, employees, and designated volunteers from and against any and all losses, defense costs, liability or consequential damages to the extent arising out of CITY’S negligent acts, errors or omissions in the performance of this Agreement.

As respects all acts or omissions which do not arise directly out of the performance of services, including but not limited to those acts or omissions normally covered by general and automobile liability insurance, VENDOR agrees to indemnify, defend (at CITY’s option), and hold harmless CITY, its elected and appointed officers, agents, employees, representatives, and volunteers from and against any and all claims, demands, defense costs, liability, or consequential damages of any kind or nature arising out of or in connection with Vendor’s (or Vendor’s subcontractors, if any) performance or failure to perform, under the terms of this Agreement; except to the extent those which arise out of the negligence of CITY.

Without limiting CITY’s right to indemnification, it is agreed that VENDOR shall secure prior to commencing any activities under this Agreement, and maintain during the term of this Agreement, insurance coverage as follows:
• Workers’ Compensation insurance as required by California statutes. • Commercial general liability insurance with a combined single limit of not less that One Million Dollars ($1,000,000) per occurrence. Such insurance shall include coverage for Premises and Operations, Contractural Liability, Personal Injury Liability, Products and Completed Operations Liability, Broad Form Property Damage (if applicable), Independent Contractor’s Liability (if applicable). • Professional liability insurance coverage, in an amount not less than One Million Dollars ($1,000,000). • Comprehensive Automobile Liability coverage with a combined single limit of not less that One Million Dollars ($1,000,000) per occurrence. Such insurance shall include coverage for owned, hired, and non-owned automobiles and shall be provided by a business automobile policy.

Each insurance policy required by this Agreement shall contain the following clause:
“This insurance shall not be canceled, limited in scope or coverage, or non-renewed until after thirty (30) days prior written notice has been given to the City of Visalia, Purchasing Division, 707 W. Acequia, Visalia, CA 93291, with the exception of cancellation for non-payment of premium, in which case ten (10) days notice shall be given” In addition, the Commercial general liability policy required by this Agreement shall contain the following clauses:
“It is agreed that any insurance maintained by the City of Visalia shall apply in excess of and not contribute with insurance provided by this policy.”
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“The City of Visalia, its officers, agents, employees, representatives and volunteers are added as additional insured as respects operations and activities of, or on behalf of the named insured, performed under contract with the City of Visalia.”
The successful bidder shall maintain the insurance for the life of the contract. Endorsements are to be received and approved by the City before work commences. Should Consultant cease to have insurance as required during any time, all work by Consultant pursuant to this agreement shall cease until insurance acceptable to the City is provided.

In addition to any other remedies CITY may have if CONSULTANT fails to provide or maintain any insurance policies or policy endorsements to the extent and within the time herein required, CITY may, at its sole option:

1. Obtain such insurance and deduct and retain the amount of the premiums for such insurance from any sums due under the Agreement; or

2. Order CONSULTANT to stop work under this Agreement and/or withhold any payment(s) which become due to CONSULTANT hereunder until CONSULTANT demonstrates compliance with the requirements hereof; or

3. Terminate this Agreement.

E. Assignment of Contract
No assignment by the vendor of the contract or any part hereof, or of funds to be received there under, will be binding upon the City unless such assignment had prior written approval and consent of the City. In the event the City gives such consent, the terms and conditions of the agreement shall apply to, and bind the party or parties to whom such work is assigned, sublet or transferred.

F. Documents/Data
A. Ownership of Documents: All original papers and documents, produced as a result of this Agreement, shall become the property of the CITY. In addition, CITY shall be provided with access and use of any other papers and documents consistent with the purpose and scope of services covered by this Agreement. Any additional copies, not otherwise provided for herein, shall be the responsibility of the CITY.

Documents, including drawings and specifications, prepared by CONSULTANT pursuant to this Agreement, are not intended or represented to be suitable for reuse by CITY or others on extensions of the PROJECT or on any other project. Any use of the completed documents for other projects and any use of incomplete documents without the specific written authorization from CONSULTANT will be at CITY’s sole risk and without liability to CONSULTANT. Further, any and all liability arising out of changes made to CONSULTANT’s deliverables under this Agreement by CITY or persons other than CONSULTANT is waived as against CONSULTANT, and the CITY assumes full responsibility for such changes unless the CITY has given CONSULTANT prior notice and has received from CONSULTANT written consent for such changes.

B. Publication: No report, information, or other data given or prepared or assembled by the CONSULTANT pursuant to this Agreement, shall be made available to any individual or organization by the CONSULTANT without the prior written approval of the CITY. Notwithstanding the foregoing, however, the CONSULTANT shall not be required to protect or hold in confidence and confidential information which (1) is or becomes available to the public with the prior written consent of the CITY; (2) must be disclosed to comply with law; or (3) must be disclosed in connection with any legal proceedings.
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C. Copyrights: The CONSULTANT shall be free to copyright material developed under this Agreement with the provision that the CITY be given a nonexclusive and irrevocable license to reproduce, publish or otherwise use, and to authorize others to use the material for government or public purposes.

G. Termination of Contract
The nature of this services contract requires that the City and the consultant must work closely as a mutually supporting team without conflict. Also, the City needs to be able to terminate this agreement at any time the City may feel this working relationship has been impaired or should the City no longer have complete confidence and satisfaction in the quality and performance of services by the proposer. Therefore:

The right to terminate this Agreement, with or without cause, may be exercised without prejudice to any other right or remedy to which the terminating party may be entitled at law or under this Agreement.

A. Termination By Either Party Without Cause: The CITY or CONSULTANT may terminate this Agreement at any time by giving written notice to the other of such termination and specifying the effective date thereof, at least thirty (30) days before the effective date of such termination. Should the contract be terminated for convenience, the proposer shall be paid for all authorized services provided, including reasonable charges for de-mobilization. However, the proposer shall not be paid any anticipated profit or fees for services not provided.

B. Termination of Agreement for Cause: The CITY may by written notice to the CONSULTANT specifying the effective date thereof, at least fifteen (15) days before the effective date of such termination, terminate the whole or any part of this Agreement in any of the following circumstances:

1. If the proposer shall fail to provide services or perform satisfactorily the work required by the terms and conditions of the contract, or materially breaches any of its obligations under this agreement the City may terminate the contract, in whole or in part.

2. Any assignment, subletting or transfer of the interest of the Consultant, either in whole or in part, without the written consent of the City shall be cause for the City to immediately terminate the agreement for default.

3. Notwithstanding any other provisions of this agreement, this agreement may be terminated by the City upon a single violation of this agreement.

C. Post-Termination:

1. In the event the CITY terminates this Agreement with or without cause, the CITY may procure, upon such terms and such manner as it may determine appropriate, services similar to those terminated.

2. Except with respect to defaults of subconsultants, the CONSULTANT shall not be liable for any excess costs if the failure to perform this Agreement arises out of causes beyond the control and without the fault or negligence of the CONSULTANT. Such causes include, but are not limited to, acts of God or of the public enemy, floods, epidemics, quarantine restrictions, strikes, and unusually severe weather; but in the event the failure to perform is caused by the default of a subconsultant, the CONSULTANT shall not be liable for failure to perform, unless the services to be furnished by the subconsultant were obtainable from other 370
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sources in sufficient time and within budgeted resources to permit the CONSULTANT to meet the required delivery schedule or other performance requirements.

3. Should the Agreement be terminated with or without cause, the CONSULTANT shall provide the CITY with all finished and unfinished documents, data, studies, services, drawings, maps, models, photographs, reports, etc., prepared by the CONSULTANT pursuant to this Agreement.

4. Upon termination, with or without cause, CONSULTANT will be compensated for the services satisfactorily completed to the date of termination according to compensation provisions contained herein. In no event, shall the total compensation paid CONSULTANT exceed the total compensation agreed to herein.

5. If, after notice of termination of this Agreement, as provided for in this article, it is determined for any reason that the CONSULTANT was not in default under the provisions of this article, then the rights and obligations of the parties shall be the same as if the Agreement was terminated without cause.

6. Termination of this Agreement shall not terminate any obligation to indemnify, to maintain and make available any records pertaining to the Agreement, to cooperate with any audit, to be subject to offset, or to make any reports of pre-termination activities.

H. Right to Require Performance
The failure of the City at any time to require performance by the proposer of any provisions hereof shall in no way affect the right of the City thereafter to enforce the same. Nor shall waiver by the City of any breach of any provision hereof be taken or held to be waiver of any succeeding breach of such provision or as a waiver of any provision itself.

I. Ethics in Public Contracting
Each proposer, by submitting a proposal, certifies that it is not a party to any collusive action or any action that may be in violation of the Sherman Antitrust Act by submitting a proposal, the proposer certifies that its proposal was made without fraud; that it has not offered or received any kickbacks or inducements from any other proposer in connection with the request for proposal; and that it has not conferred on any public employee, public member or public official having responsibility for this procurement transaction, any payment, loan, subscription, advance, deposit of money, services, or anything of more than nominal value. The proposer further certifies that no relationship exists between itself and the City or another person or organization that interferes with fair competition or constitutes a conflict of interest with respect to a contract with the City of Visalia.

Prior to the award of any contract, the potential Consultant may be required to certify in writing to the Purchasing Division that no relationship exists between the proposer and any City employee, officer, official or agent that interferes with fair competition or is a conflict of interest with respect to a contract with the City of Visalia.

More than one proposal from an individual, firm, partnership, corporation or association under the same or different names may be rejected. Reasonable grounds for believing that a proposer has interest in more than one proposal for the work solicited may result in rejection of all proposals in which the proposer is believed to have an interest.

J. Independent Contractor
In the performance of the services herein provided for, the Consultant shall be, and is, an independent contractor and is not an agent or employee of the CITY. The Consultant has and shall retain the right to exercise full control and supervision of all persons assisting the Consultant in the performance of said services hereunder. The Consultant shall be solely responsible for all matters relating to the payment of its employees including compliance with social security and income tax withholding and all other regulations governing such matters. 371
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K. Equal Employment Opportunity
During the performance of the contract, proposer agrees to the following:

1. Proposer shall comply with all the requirements, when applicable, of the California Fair Employment Practice Commission and provisions of, when applicable, all Federal, State of California, County of Tulare and City of Visalia laws and ordinances related to employment practices.

2. Proposer shall not discriminate against any employee or applicant for employment on the basis of race, religion, color, gender, age, handicap, national origin or ancestry, except when such a condition is a bona fide occupational qualification reasonably necessary for the normal operations of the proposer. The proposer agrees to post in conspicuous places, visible to the employees and applicants for employment, notices setting forth the provisions of this nondiscrimination clause.

3. Proposer, in all solicitations or advertisements for employees, placed by, or on behalf of the proposer, shall state that proposer is an Equal Opportunity Employer.

L. Venue
Any contract resulting from this solicitation shall be governed by, and construed in accordance with, the laws of the State of California. Venue for any litigation arising out of the contract will be vested in Tulare County, California.

M. Proprietary Information
The proposals received shall become the property of the City of Visalia and are subject to public disclosure. Proposal prices and information submitted by proposer’s will be made available to proposer’s after City Council has approved award of contract. Proposers are to indicate any restrictions on the use of data contained in their responses. Those parts of a proposal which are defined by the proposer as business or trade secrets, as that term is defined in California Government Code, Section 6254.7, and are reasonably marked as “Trade Secrets”, “Confidential” or “Proprietary” shall only be disclosed to the public if such disclosure is required or permitted under the California Public Records Act or otherwise by law. Proposer’s who indiscriminately and without justification identify most, or all, of their proposal as exempt from disclosure may be deemed non-responsive.

N. Incurring Costs
The City of Visalia is not liable for any cost incurred by proposers in responding to this Request for Proposals.

O. Executive Order N-6-22 – Russia Sanctions
On March 4, 2022, Governor Gavin Newsom issued Executive Order N-6-22 (the EO) regarding Economic Sanctions against Russia and Russian entities and individuals. “Economic Sanctions” refers to sanctions imposed by the U.S. government in response to Russia’s actions in Ukraine, as well as any sanctions imposed under state law. By submitting a bid or proposal, Contractor represents that it is not a target of Economic Sanctions. Should the State determine Contractor is a target of Economic Sanctions or is conducting prohibited transactions with sanctioned individuals or entities, that shall be grounds for rejection of the Contractor’s bid/proposal any time prior to contract execution, or, if determined after contract execution, shall be grounds for termination by the State. 372
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To accompany Proposal

NON-COLLUSION AFFIDAVIT
TO: THE CITY OF VISALIA
The undersigned, in submitting a proposal for performing the following work by contract, being duly sworn, deposes and says:

That he/she has not, either directly or indirectly, entered into any agreement, participate in any collusion, or otherwise taken any action in restraint of free competition in connection with such contract.

Work to be Done:

RFP No. 24-25-07 Design Digester 9 at Visalia’s Water Reclamation Facility Proposer’s Name: ______________________________________________________ Signature of Proposer: ___________________________________________________ Title: _________________________________________________________________ Business Address: ______________________________________________________ Place of Residence: _____________________________________________________ State of California
County of ________________________
On this __________ day of _______________before me, ___________________________________________, a Notary Public, personally appeared ____________________________________________,who proved to me on the basis of satisfactory evidence to be the person(s) whose name(s) is/are subscribed to the within instrument and acknowledged to me that he/she/they executed the same in his/her/their authorized capacity(ies), and that by his/her/their signature(s) on the instrument the person(s), or the entity upon behalf of which the person(s) acted, executed the instrument.

I certify under PENALTY OF PERJURY under the laws of the State of California that the foregoing paragraph is true and correct
WITNESS my hand and official seal.

Signature __________________________________ (Seal)
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To accompany Proposal
WORKERS’ COMPENSATION INSURANCE CERTIFICATE

STATE OF CALIFORNIA )
) ss

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To accompany Proposal

4. The vendor will comply with all provisions of Executive Order 11246 of September 24, 1965, and the rules, regulations and relevancy orders of the Secretary of Labor.

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To accompany Proposal
The following disclosure and statement apply to the Bidder/Proposer/Contractor/Consultant/ Vendor/Supplier or Company:

1. submitting a bid or proposal in response to a solicitation by City of Visalia; or

2. as Awardee of a contract/purchase order which is subject to approval by the Visalia City Council.

List the names of all principals, partners, and/or trustees. For corporations, provide names of officers, directors and all stockholders owning more than 10% equity interest in corporation:
___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________________ ___________________________________________________________________________________

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To accompany Proposal

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To accompany Proposal

STATE OF CALIFORNIA

DRUG-FREE WORKPLACE CERTIFICATION
STD.21 (REV.12-93)

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To accompany Proposal

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AGREEMENT FOR PROFESSIONAL SERVICES TO DESIGN
DIGESTER 9 AT VISALIA’S WATER RECLAMATION FACILITY
This Agreement, entered into this ________ day of ________________, 20____, by and between the City of Visalia, hereinafter referred to as the “CITY”, and ____________________________ hereinafter referred to as the “CONSULTANT”.

W I T N E S S E T H
WHEREAS, the CITY is authorized and empowered to employ consultants and specialists in the performance of its duties and functions; and
WHEREAS, the CITY has the desire to secure certain technical and professional services to assist in the preparation and completion of the items of work described as “Scope of Work” in Exhibit “A”, and hereinafter referred to as the “PROJECT”; and
WHEREAS, the CONSULTANT represents it is licensed, qualified and willing to provide such services pursuant to terms and conditions of this Agreement.

NOW, THEREFORE, CITY and CONSULTANT agree as follows:

I. SERVICES TO BE PERFORMED BY THE CONSULTANT
A. Authorized Scope of Work: The CONSULTANT agrees to perform all work necessary to complete in a manner satisfactory to the CITY those tasks described in Exhibit “A” - Scope of Work, for the cost identified in Exhibit “B” - Project Fee.

B. Additional Services: Incidental work related to the PROJECT and not provided for in Exhibit “A” may be needed during the performance of this Agreement. The CONSULTANT agrees to provide any and all additional services at the rates identified in attached Exhibit “C” - Schedule of Fees for Professional Services. Such additional services shall not be performed by CONSULTANT without the written consent of CITY.

II. TIME OF PERFORMANCE
The CONSULTANT shall commence performance of this Agreement within ten (10) days of Consultant’s Notice to Proceed following City Council approval of this Agreement and shall complete the work within the timeframes outlined in Exhibit “A”, unless otherwise extended in writing by CITY, in its sole discretion.

If the CONSULTANT fails to complete the PROJECT within the time specified, plus any extensions of time which may be granted, the CITY shall determine the percent of each work item completed and shall pay the CONSULTANT on that basis.

CONSULTANT shall not be responsible for delays which are due to causes beyond the CONSULTANT’s reasonable control. In the case of any such delay, the time of completion shall be extended accordingly in a writing signed by both parties.

III. COMPENSATION
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A. Total Compensation: For services performed pursuant to this Agreement, the CITY agrees to pay and the CONSULTANT agrees to accept, as payment in full, a sum not to exceed _______________________________________ dollars ($ ). This amount shall constitute complete compensation, including document production and out-of-pocket expenses for all services for the work and PROJECT identified in Exhibits “A” and “B”.

B. Payment of Compensation: The CONSULTANT shall be compensated according to the progress payment schedule set forth in Exhibit “D” upon completion of percentage of each noted phase. The CONSULTANT shall be paid no later than thirty (30) days following submission of a written, verified billing to the CITY. Said billing shall include the percentage of each task completed to date and since the date of the preceding billing, if any.

IV. AUTHORIZED REPRESENTATIVE
B. CITY: The _____________________ shall represent the CITY in all matters pertaining to the services to be rendered under this Agreement, except where approval of the City Council of the City of Visalia is specifically required.

C. CONSULTANT: ______________ shall represent and act as principle for CONSULTANT in all matters pertaining to the services to be rendered by it under this Agreement.

V. TERMINATION
The right to terminate this Agreement, with or without cause, may be exercised without prejudice to any other right or remedy to which the terminating party may be entitled at law or under this Agreement.

1. If the CONSULTANT fails to perform the services called for by this Agreement within time(s) specified herein or any extension thereof; or

2. If the CONSULTANT fails to make progress under this Agreement as to endanger performance of this Agreement in accordance with its terms, and does not correct such failure within a period of ten (10) days (or longer period as the CITY may authorize in writing) after receipt of notice from the CITY specifying such failure.

C. Post-Termination:

1. In the event the CITY terminates this Agreement with or without cause, the CITY may procure, upon such terms and such manner as it may determine appropriate, services similar to those terminated.

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Visalia City CouncilOctober 6, 2025

Visalia City Council
October 6, 2025