Project Information

Bid Title

Diving Services for Water Tank and Fish Screen Maintenance and Assessment

Issuing Agency

City of Antioch

Location

California

Published Date

Dec 17, 2025

Closing Date

Jan 21, 2026

Government Level

State & Local

Status

Closed

Ref. #

P.W. 733

Original Source

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Bid Documents

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Project Description

Bid Number:	P.W. 733
Bid Title:	Diving Services for Water Tank and Fish Screen Maintenance and Assessment
Category:	Public Works RFQs
Status:	Open
Bid Recipient:	[email protected]

Description: The City of Antioch seeks to retain the services of a qualified contractor to provide inspection, cleaning, and condition assessment of potable water storage facilities and submerged infrastructure. The City operates ten (10) potable water storage tanks located throughout the City, two (2) clearwells, and submerged fish screens at the City’s river intake pump station. The fish screens are approximately 48 inches wide and 16 feet long. A map identifying the locations of these facilities is included in this RFQ as “Attachment D”. Publication Date/Time: 12/17/2025 12:00 AM Closing Date/Time: 1/21/2026 2:00 PM Contact Person: Marcus Woodland, Water Treatment Plant Superintendent [email protected] Related Documents: RFQ P.W. 733 Diving Services for Water Tank and Fish Screen Maintenance and Assessment

Attachment Preview

REQUEST FOR QUALIFICATIONS

FOR

DIVING SERVICES FOR WATER TANK AND FISH

SCREEN MAINTENANCE AND ASSESSMENT

PROJECT NO. P.W. 733

Qualification Due Date: January 21, 2026

Public Works Department

Water Treatment Plant Division

1201 W 4th St

Antioch, CA 94509-5007

(925) 779-6950

Page 1 of 6

INTRODUCTION

The City of Antioch seeks to retain the services of a qualified contractor to provide inspection,

cleaning, and condition assessment of potable water storage facilities and submerged

infrastructure. The City operates ten (10) potable water storage tanks located throughout the City,

two (2) clearwells, and submerged fish screens at the City’s river intake pump station. The fish

screens are approximately 48 inches wide and 16 feet long. A map identifying the locations of these

facilities is included in this RFQ as “Attachment D”.

The deadline for submission of qualifications for this work is January 21, 2026, at 2:00 p.m.

SCOPE OF WORK

The contractor shall furnish all labor, materials, equipment, consumables, and related services

required to conduct inspection, cleaning, mobilization, safety procedures, video documentation,

reporting, and on-call support for the City of Antioch’s potable water tanks and fish screens.

Required project tasks include the following:

• The contractor shall provide services under both scheduled maintenance and on-call

arrangements.

• For all on-call service requests, the contractor shall respond within one (1) week of

notification.

• The anticipated annual budget for this work is fifty-thousand dollars ($50,000.00);

however, contractors shall submit their own fee schedules for evaluation.

• Mobilize to the site and set up the dive trailer and equipment.

• After access is developed and Lockout/Tagout (LOTO) is confirmed, dive contractor

shall set up the dive system.

• Divers shall inspect and clear material from the intake screens and/or bottoms of

tanks.

• All equipment shall be maintained to industry standards and OSHA requirements.

• Perform underwater inspection by diver with simultaneous video recording, including

voice narration and a display of sufficient size to allow for real-time viewing.

• Provide a video recording system capable of capturing color still images onsite and

using methods for indexing, sorting, and detailing specific portions of the video.

• Demobilize personnel and equipment from the site.

• Perform site clean-up and demobilization, including removal of all

temporary facilities, construction materials, debris, and waste from the

project site.

• Submit the following documents:

o Final Dive Video

o Final Dive Report

SCHEDULE OF SERVICES

Service Location

Water Storage Tanks

River Pump Station

Routine Inspections

Every three (3) years

Annually (once per year)

Page 2 of 6

As-Needed Inspections

Per City request

Per City request

TANK ASSESSMENTS

The goal is to complete potable water tank assessments to determine sound maintenance

strategies and plans for maintaining the structures. Surveys of both the internal and external

surfaces of the potable water tanks shall be completed. Underwater surveys will be performed while

the potable water tanks are full of water using special underwater techniques and American Water

Works Association (AWWA) C652 sanitary procedures for potable water tanks.

The focus of the inspections will be to evaluate the current condition of the interior and exterior

coating systems and the level of corrosion on the tanks. The evaluation will include visual

observations, dry film thickness (DFT) measurements, adhesion testing, and potentially corrosion

pit depth and/or ultrasonic (UT) testing, if applicable.

During the evaluations, particular attention will be paid to the condition of the following critical areas:

• Roof

• Roof Structure Shell

• Tank Bottom

• Overflow Pipe/Weir

• Drains/Sumps Inlets/Outlets

• Piping

• Vents/Screens

• Shell and Roof Chine/Joints

• Weld or Bolt Connections

• Ladders/Safety Climbs

• Vandal Deterrents

• Platforms/Railings

• Manways Hatches Gaskets

• Ringwall/Anchor Bolts

• Grade/Tank Crevices

• Water Level Indicators

• Cathodic Protection (CP) Equipment/Components

ASSESSMENT REPORT/ RECOMMENDATIONS

The deliverable will be a written narrative and color pictorial description of the condition of each

potable water tank, along with specific recommendations for coatings, cathodic protection (CP), and

structural considerations, where applicable.

Recommendations for maintenance work will be based on the level of corrosion and the condition

of potable water tank coatings and cathodic protection (CP) systems. Corrosion assessments will

be based on the amount of change from the original tank design.

The life expectancy of existing coating systems, as well as projected corrosion rates on the

structures, will be used to determine future maintenance strategies. Recommendations for coatings

work will be based on paint or lining percentage of failure, ability to be recoated, film heavy metal

content, estimated remaining life of the system(s), and/or concerns with any impressed current

cathodic protection (CP) systems.

Page 3 of 6

Recommendations for cathodic protection (CP) repair work, if required, will include a list of

necessary repairs. Recommendations for any future retrofitting concerns will also be presented,

where identified.

The contractor will comment on any applicable safety, sanitary, vandalism, and seismic concerns:

• Safety concerns include ladder size/design observations, fall-prevention systems, roof

access areas, etc.

• Sanitary concerns include venting and other tank openings such as overflow air gaps.

• Vandalism concerns include evaluation of perimeter fencing, lock mechanisms, and climbing

deterrents.

• Seismic concerns include visual indications of tank movement, flexible couplings, drain

locations, etc.

• It should be clear that this cost proposal does not include a seismic analysis of a tank’s

ability to structurally withstand a probable seismic event, nor does this scope include any

geotechnical or soils reports.

• A narrated video will also be included for the interior inspection of the tank that is inspected

underwater.

FORMAT OF THE STATEMENT OF QUALIFICATIONS

The submittal is to be prepared in a bound 8 ½” x 11” format limited to approximately 30 pages,

including brochures. Covers, dividers are not included in the page count. In addition, any

information that needs to be returned should not be submitted. The Consultant is requested to

include the following information in the SOQ. It is expected that the SOQs will follow the order listed

below:

• Cover letter introducing the firm and describing why you want to be considered. Provide

location of the office that will be performing the work

• Organization chart for the project team

• Brief information for key staff including education, directly related experience, description of

their assignment on this project, and résumé

• A list of proposed sub-consultants, and a description of their proposed services

• Summary of the company’s relative experience and performance

• Summary of approach for completing the work

• Detailed scope of work of activities required

• A list of equipment available to support the performance of this project

• Current fee schedule

• List of contracts/agreements terminated for convenience or default within the past three

years, if any.

• List any litigation that now affects or may affect in the future consultant firm’s ability to

perform.

• Confirm your firms’ ability to meet contract and insurance requirements.

• Anticipated labor effort by task and classification for each activity

Page 4 of 6

• Milestone schedule for project completion

ADDENDA

All questions regarding this RFQ must be submitted via email to Marcus Woodland at

mwoodland@antiochca.gov by January 14, 2026, at 4:00 p.m. Questions received after this

deadline will not be considered. Responses to all submitted questions will be issued via written

addendum. Any addenda issued for this RFQ must be acknowledged and included with the

proposer’s SOQ. The addenda will not count toward the page limit.

CONSULTANT SELECTION PROCESS

Enclosed is a copy of the City of Antioch’s Maintenance Services Agreement. By submitting a

proposal for this work, a firm agrees to comply with all terms and conditions outlined in the

agreement, including all insurance requirements.

It is anticipated that from the proposals submitted, City staff will be able to select the firm best suited

to meet the City’s needs. However, if that is not possible, the City will ask a “short list” of firms to

meet with staff to discuss the project and the firm’s proposal. The City will negotiate a professional

services contract for the work after staff has determined the best qualified firm.

No compensation will be due any firm for preparation of a written proposal or for meeting with staff

after a “short list” has been determined.

The selected firm will receive a notice to proceed after the City Council has approved their contract.

CRITERIA FOR SELECTION

All proposals will be evaluated based on the criteria below.

• Qualifications and experience with similar projects - 30 points

• Understanding of the scope and potential challenges - 25 points

• Familiarity with applicable standards and procedures - 20 points

• References - 15 points

• Organization of proposal – 10 points

SUBMISSION INSTRUCTIONS

Three (3) bound, one (1) unbound and one (one) electronic copy of the proposal must be

submitted no later than January 21, 2026, at 2:00 p.m. to:

Marcus Woodland

Water Treatment Plant Superintendent

Public Works Department

Water Treatment Plant Division

1201 W 4th St

Antioch, CA 94509-5007

Interviews will be conducted if there is not an outstanding response, and two or three firms are very

close in evaluation points. Any questions regarding the above should be directed to Marcus

Woodland via email at mwoodland@antiochca.gov.

Page 5 of 6

Commodity Codes

• NAICS 221310Water Supply and Irrigation Systems
• NAICS 237110Water and Sewer Line and Related Structures Construction
• NAICS 237990Other Heavy and Civil Engineering Construction
• NAICS 238990All Other Specialty Trade Contractors
• NAICS 541620Environmental Consulting Services
• NAICS 541990All Other Professional, Scientific, and Technical Services
• NAICS 561990All Other Support Services

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