Bid Notice-Wastewater System Flow Monitoring Services.pdf

PDF 856 KB Posted Aug 29, 2026

Attached to: EV Charging Station Installation and EV Purchase Phase I
Solicitation number: 2026-09
Issued by: Nevada County, Torrance City, California

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Written by GovTribe AI · Sep 8, 2026

Bid Notice - Wastewater System Flow Monitoring Services

This bid notice solicits proposals from qualified contractors for wastewater system flow monitoring services to be provided to a California municipality. The project scope encompasses the furnishing and installation of up to 50 flow monitors in manholes throughout the city's wastewater collection system, with approximately 42 locations predetermined based on sites used in the previous 2014/15 flow monitoring project and up to eight additional preferred manhole locations requiring pre-inspection. The flow monitoring and data collection phase is expected to span approximately four months during winter and spring 2027, with the entire project duration, including data analysis and all deliverables, lasting approximately one year. The project requires coordination with a Wastewater Master Plan consultant to be hired by the end of 2027 for data transfer and response to technical inquiries. The contractor will be responsible for capturing both wet and dry weather flows, which are critical for operational planning, the Wastewater Master Plan, and future utility planning to support the city's expanded General Plan Update.

The contractor must furnish all materials, equipment, tools, labor, and incidentals required by the contract documents and is responsible for all quality control testing to verify compliance with contract specifications. The contractor's work will not replace or limit the city's right to conduct independent quality assurance, acceptance, or independent assurance testing. All work must be completed within existing city public right of way and property, with coordination required between the city and contractor prior to construction commencement. While specific pricing terms, bonding requirements, insurance specifications, small business set-asides, incumbent contractor information, bid due dates, site visit requirements, and bidders' conference details are referenced as contained in the attached bid notice file, these details are not fully enumerated in the provided documentation summary.

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OPEN

Wastewater System Flow Monitoring Services Utilities

22000, 90700, 91800, 91842, 92500, 98184

Project ID: 2026-09

Release Date: Thursday, August 13, 2026

Due Date: Tuesday, September 8, 2026 11:00am

Posted Thursday, August 13, 2026 3:44pm

All dates & times in Pacific Time - Los Angeles

Draft Response No Bid

Time Remaining: 10 days, 0 hours, 38 minutes

To respond to this project, please click the "Draft Response" button above.

1. Introduction

1.1. Notice to Consultants

Dear Consultant:

The City of Modesto (City) is soliciting Request for Proposals / Request for Qualifications (RFP /

RFQ) for Wastewater System Flow Monitoring Services for the City of Modesto.

If you wish to be considered for this project, please electronically submit your Proposals /

Statements of Qualifications through the City's OpenGov Procurement portal before 11:00 am on Tuesday, September 8, 2026. Proposals / Statements of Qualifications received in any other format will not be accepted.

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1.2. Background

A selection committee will evaluate all submittals; however, the Request for Proposals / Request for

Qualifications (RFP / RFQ) does not commit the City to award a subsequent Agreement for

Consultant Services, to pay for any costs incurred in preparation or presentation of the Proposals /

Statements of Qualifications, or to procure a contract for services. Following the selection committee’s evaluation of submittals, interviews may be conducted and your firm may be contacted to schedule an interview date. Afterwards, the City may select a consultant to proceed with this project. The selection considerations for evaluating the submitted documents are included in this

Request for Proposals / Request for Qualifications (RFP / RFQ).

This Request for Proposals / Request for Qualifications (RFP / RFQ) contains specific instructions and requirements for preparing and submitting a Proposals / Statements of Qualifications.

Due to scheduling, requests to meet with City staff to discuss this Request for Proposals / Request for Qualifications (RFP / RFQ) will not be considered.

The City was first incorporated in 1870 and operates as a Charter City. The City encompasses approximately 42 square miles in Stanislaus County and has approximately 225,000 wastewater customers. The wastewater system is comprised of approximately 680 miles of sewer pipes ranging from 6-in to 66-in diameter, 43 lift stations, and two treatment plants with primary treatment at

Sutter Campus and Secondary and Tertiary Treatment at Jennings Campus.

2. Scope of Design Services

The scope of services for this project shall include Wastewater System Flow Monitoring Services .

The scope also includes support for the work to be provided after it is awarded.

The scope of services for this project will include the installation of up to 50 flow monitors in manholes throughout the City’s wastewater collection system. Approximately 42 of these locations are predetermined and will utilize the same locations used in the previous 2014/15 flow monitoring project. Up to eight additional preferred manhole locations have been identified and will need to be inspected; these preferred manholes are provided ahead of time. This project is expected to commence as soon as possible after City Council approval of the consultant agreement. The flow monitoring/data collection phase is expected to last approximately four (4) months through the winter and spring of 2027. The entire project duration including data analysis and all deliverables is expected to last approximately one year and will require some coordination with a Wastewater Master Plan consultant to be hired by end of 2027 for transfer of data and response to questions on data. This project will capture wet and dry weather flows and is critical information for our operations, the Wastewater Master Plan, and future utility planning for City’s expanded General Plan Update.

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2.1. Project Management

2.2. Permitting

2.3. Environmental Clearance

2.4. Wastewater Flow Monitoring

The consultant shall be required to provide project management as necessary to ensure the efficient completion of the project. Project management duties would include, but not be limited to:

coordinating with any sub-consultants, providing updates and seeking input from City staff (as appropriate), monitoring of project budget and schedule, and preparation for and attendance at meetings as directed by City staff, coordination with City’s master plan consultant for transfer of all collection system data and availability to respond to questions about the flow monitoring effort and data collected.

The consultant will be required to frequently communicate with City staff, both through informal discussions and formal meetings, to obtain input and provide updates for the project. The consultant shall keep comprehensive minutes from formal meetings and shall provide copies for reference. Biweekly meetings are anticipated throughout the various stages and data collection phases of the project and may be conducted via teleconference, video conference, or in person.

Unless otherwise directed by the City’s project manager, all correspondence to City staff will be directed to the City’s project manager. The City’s project manager will initiate any contact with outside agencies and the public.

Consultant shall be responsible for coordinating and submitting applications and any plan reviews for all permitting necessary for field work. Contractor shall be ultimately responsible to obtain & pay all fees necessary.

Permitting not limited to obtaining and coordinating permitting with the following:

A. City of Modesto

B. Stanislaus County

The City of Modesto is responsible for preparing the necessary documentation for the project to gain environmental clearance.

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A. The Consultant shall accurately and reliably monitor, collect, and retain flow data for use by the City’s Wastewater Master Plan Consultant and City Staff.

B. Flow monitoring data shall be collected continuously at a minimum of 5-minute intervals on a

24-hour, 7-day per week basis for the duration of the 4-month flow monitoring period. The consultant shall make all necessary arrangements to avoid any ‘lost data’ as a result of storage capabilities. The consultant shall review and analyze data as often as necessary to verify and ensure the equipment is working in accordance with the manufacture’s specifications, and meeting the City’s flow monitoring criteria.

C. Flow monitors are expected to be installed and operational to capture the typical to heavy winter and spring wet weather storm events anticipated for the Modesto area. This period is generally December through April, so it is essential that monitors be ready to operate for the winter/spring seasons. All accessories for flow monitor installation, data collection, and management shall be provided by the Consultant.

D. The depth of the flow shall be physically measured manually in the manhole and shall be recorded on the “Field Calibration Document” and compared against the depth measured by the installed flow monitoring equipment. The accuracy of this calibration shall be within ±5% for depth. Topside or street level measurements are unacceptable.

E. A velocity profile shall be taken using a portable velocity meter at multiple points in the pipe at the initial installation and an average velocity shall be recorded on the “Field Calibration

Document.” The average portable velocity recordings shall be compared to the velocity measured by the installed flow monitoring equipment. The accuracy of this calibration shall be within ±10% for velocity.

F. The consultant shall maintain an adequate supply (with back-order timing of 2 days or less) of sensors, monitors, spare parts, and other major hardware components for servicing any problem to the equipment. The consultant shall inform the City of any malfunctions and repair malfunction immediately.

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2.5. Deliverables

A. The Consultant shall submit hard copies of a “Site Assessment Form” and a “Field Calibration

Document” of each site after installation of the flow monitoring equipment. These forms shall detail the installation of the flow meter with pertinent information such as pipe ID, silt level, independent measurement of level and velocity during flow meter installation, assessment of the shape and roundness of pipe, depth and location of sensor relative to pipe invert, distance of invert to grade, condition of manhole relating to obtaining an accurate flow measurement, and anomalies present (tree roots, cracks, debris, etc.).

B. Raw flow monitoring data shall be retained and provided electronically in both graphical and tabular formats. Flow data shall include, but is not limited to:

1. Depth of flow (in inches)

2. Velocity of flow (in feet per second)

C. Refined data (data adjusted for typical flow anomalies consistent with raw data) and

Calculated data (from measured data) shall be provided electronically in both graphical and tabular formats. Flow data shall include, but is not limited to:

1. Depth of flow (in inches)

2. Velocity of flow (in feet per second)

3. Volume of flow (in gallons per day or million gallons per day)

D. The Consultant shall document and include in the Flow Monitoring Report a minimum of three

(3) digital photos including; a) the location where the flow will be monitored, b) at the opening of the pipes into the manhole and, c) a photo looking upstream and downstream of the monitor. Other digital photos are welcome as the consultant deems necessary to further describe or add value about the monitoring site. Relevant diagrams/drawings are also required.

E. Types of data expected beyond the measured flow parameters include, but are not limited to:

the average, low, and peak recorded velocities, depths, and flows at each location, weekday

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F. Flow monitoring data shall be made electronically available to the City prior to the completion of the flow monitoring period, if requested, as early as such data is available for review. Data shall be exportable to CSV file and/or EXCEL spreadsheet and provided on the CD (or by other agreed digital transfer format) with the Flow Monitoring Report. Data may also be requested electronically to the City’s master plan consultant.

G. Rain Gauge data shall be retained and provided in graphical and tabular formats and presented in inches per hour units of measure for each rain gauge location.

H. The Flow Monitoring Report shall be provided after the end of the flow monitoring period in a clear and accurate format acceptable to the City and shall contain a summary of:

1. The flow monitoring equipment used

2. How each monitor was calibrated

3. Flow data in graphic and tabular forms of each monitored location

4. Continuity flow hydrograph versus rainfall, plotted with depth and velocity

5. Results of I & I Analysis and any measured dry-weather groundwater infiltrations

6. Any troubleshooting that was performed

7. Explanations of any anomalies in data

8. Summary of percent uptime

I. The Flow Monitoring Report shall be organized at a minimum to include a Table of Contents, Executive Summary, Introduction, Methods & Procedures, Rainfall Results, Flow Monitoring

Results for each location, Conclusions and Recommendations, and Appendices as required.

The Consultant and City staff will work together to develop the final report format, if needed, for public consumption and user-friendliness.

J. The consultant shall deliver two (2) electronic copies of a Draft Flow Monitoring Report for staff review and comment and then one (1) electronic Final Draft Flow Monitoring Report (95%

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Final Flow Monitoring Report shall be provided to City staff. The City staff review and comment period is expected to be no more than four weeks for the Draft Report and about one week for the Final Draft Report, depending on level of comments needed.

K. The Flow Monitoring Report shall be formatted for conformance American Disabilities Act such that any publicly available document and specifically the Final Document will be accessible per ADA standards. The City utilizes CommonLook software to review documents for ADA compliance. The Consultant may use a compatible software, however, documents not meeting compliance through City’s software may require revisions to meet compliance.

L. Duration of consultant agreement project is estimated at up to 12 months in order for a master plan consultant to be brought on-board for receipt and review of data.

The scope of services set forth in this RFP is not all-encompassing, but represents the typical tasks that City staff perceives as important to the successful completion of this Project and anticipates the successful proposer to perform. The consultant is encouraged to suggest changes/additions to this scope of services (as a part of the Proposal) that would add value in order to help achieve the objectives of this Project.

3. Submittal Requirements

3.1. Requests for Clarifications, Corrections or Modifications

It is the policy of the City of Modesto (when not prohibited by the funding source) that, all other factors being equal, local firms whose qualifications are satisfactory and who have sufficient experience and capabilities for providing the necessary professional services shall normally be given priority in being considered for employment by the City. The location of any sub-consultant firms proposed by the consultant will also be considered when applying this policy.

Any requests for clarifications, corrections or modifications of this Request for Proposals / Request for Qualifications (RFP / RFQ) shall be submitted through the Question & Answer section of this

Request for Proposals / Request for Qualifications (RFP / RFQ) on the City's OpenGov Procurement portal: https://procurement.opengov.com/portal/modestogov/projects/293505 before 4:00 pm on

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3.2. Submittal Due Date

3.3. Agreement

Tuesday, August 25, 2026. Responses from the City will be communicated in writing with all responses provided to all approved questions posted publicly and as an addendum, if needed. The

City of Modesto reserves the right to reject any Proposals / Statements of Qualifications that contains unauthorized conditions or exceptions.

Proposals / Statements of Qualifications must be submitted through the City's OpenGov

Procurement portal prior to 11:00 am on Tuesday, September 8, 2026. Proposals / Statements of

Qualifications received after the above specified date and time or in a manner other than as stated above will not be considered.

Cost proposals shall be submitted as a separate file if stated in this Request for Proposals /

Request for Qualifications (RFP / RFQ). An upload area stating such will be made available within this Request for Proposals / Request for Qualifications (RFP / RFQ) on the City's OpenGov

Procurement portal. If such a requirement is noted in this Request for Proposals / Request for

Qualifications (RFP / RFQ), no cost information should be present in the other uploads you provide unless otherwise specified within this Request for Proposals / Request for

Qualifications (RFP / RFQ). Before submitting the file, make sure to review the file to avoid submitting duplicate files.

Following interviews (should they be deemed necessary) negotiations will begin with the firm deemed most qualified. If agreement cannot be reached in negotiations, the City will begin negotiations with the firm that is judged to be next most qualified. If the City determines to approve the agreement, a City of Modesto Standard Agreement shall be sent to the successful firm for signature. If an agreement is reached, the Standard Agreement will be presented to Council for approval. Once City Council has approved the Standard Agreement, the agreement will be executed by the City. No Proposals / Statements of Qualifications shall be binding upon the City until after duly authorized representatives of both the firm and the City have signed the Standard

Agreement. The City shall have the sole authority to terminate negotiations with any firm at any time without recourse by the firm. The approval of the agreement, if made by the City, will be based on a total review and analysis of each Proposals / Statements of Qualifications and any interviews deemed necessary.

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3.4. Conflict of Interest/City Business License

A sample City of Modesto Standard Agreement is included for your reference (Attachment A).

Please review the sample agreement carefully with your legal and/or insurance representative.

Firms are REQUIRED to submit any questions, concerns or language change requests regarding this agreement in writing as a part of this Proposals / Statements of Qualifications.

Firms choosing not to submit any questions, concerns, or language requests, in writing, as part of this Proposals / Statements of Qualifications are assumed to agree with the agreement in its entirety, as written, with no exceptions.

The City requires that the firm’s Principal file a Statement of Economic Interest Form 700 with the

City to the satisfaction of the Fair Political Practices Commission (FPPC) when the firm provides information, advice, recommendations or counsel to the City. Before the City enters into an agreement for services with the selected firm, the Principal will be required to report individual economic interests within the City of Modesto on the following:

1. Real Property Interest (geographically limited)

2. Sources of Income

3. Business Positions

4. Business Investments

The selected firm is also required to submit a completed and signed Financial Interest Disclosure

Form and will have a City of Modesto business license.

4. Contents of Proposal

1. Cover Letter

Upload a cover letter that satisfies the following requirements:

The City is seeking Proposals/Qualifications as one single package from consulting firms that demonstrate experience in conducting wastewater flow monitoring, data collection and analysis, and developing flow monitoring reports of the magnitude and scope to the described project components. The submitted material should focus on technical content and field work that demonstrates the experience and capability of the firm and its team.

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The cover letter should introduce the firm, the project manager and design team. The letter should highlight key attributes of the firm’s experience relative to the project scope, the team’s approach, and the firm’s commitment to provide services to the City of Modesto.

2. Project Team and Experience

The Project Team section should be succinct and focus on content that demonstrates the required experience, capability, availability, and commitment of the firm and its team.

Include the Project Manager, key employees, agents, and sub-consultants who are anticipated to be assigned to this project.

Provide a summary of the qualifications, licenses, experience, type of work to be performed, and availability of each individual. The firm and sub-firm, if any, should have experience with wastewater flow monitoring installation, data collection, and data analysis comparable and compatible to Modesto’s wastewater system and scope of work requirements.

The firm’s Project Manager will be directly responsible for and engaged in leading the required services. The Project Manager must be knowledgeable and experienced in all aspects of the described project and shall possess the leadership skills necessary to meet project objectives.

The project team must demonstrate the required knowledge, experience, and availability for this project. Consultants work history will be rated on relevance to the project and are encouraged to provide specific information in this regard including relevant and recent projects of similar scope and complexity. Tabular formatting is encouraged for this section of your proposal.

The Project Team section must Include:

1. Names and titles of each person, years of experience with the Firm, and years of experience with other Firms

2. Education, degree, certifications, specializations

3. Active professional registration (State and discipline)

4. Representative experience for not more than five (5) completed projects similar in scope, size and complexity to the Project with at least two (2) completed in the last two years.

5. Owner, project description (including size), location and completion date. If project is in progress, provided estimated completion date and level of commitment.

6. Name, address and phone number of knowledgeable owner/client’s representative

7. Consultant services for which the individual was directly responsible; service/functions directly performed by individual (not just job title)

8. Firm with which the individual was employed during project experience

9. Project name, background, specific services performed, date completed, project costs, client contact.

3. Proposed Scope of Services

The proposed scope of services should address the key items outlined in the Background and Scope of Design Services subsections of this Request for Proposals / Request for Qualifications (RFP / RFQ), and shall include the firm’s understanding of the desired work.

4. Project Schedule

Project schedule should be one page, a single page of size 11x17 is acceptable.

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Upload your proposed design schedule for all services necessary to complete the project, specifying the major tasks, the expected time to complete each task, and the interdependency of the tasks.

5. Level of Effort

Level of effort should be one page, a single page of size 11x17 is acceptable.

The consultant shall provide an estimate of staff time (in hours), by tasks under Scope of Design Services. Include the location of the offices where task items will be performed and the percentage of work by cost, which will be performed out of those offices. Indicate local consultant participation.

Actual costs shall not be indicated in this section, show percentages of the total costs. Task items indicated in the Level of Effort shall match those indicated in the Scope of Services and Fee Proposal.

6. Additional Information

For any additional information requested or required by any of your previously provided answers or as stated within this Request for Proposals / Request for Qualifications (RFP / RFQ) please upload the additional documentation as part of your proposal.

6.1. Proposal (without Cost)*

Please upload your Proposal here formatted in the manner required by this Request for Proposals / Request for Qualifications (RFP / RFQ). This upload here should NOT INCLUDE any pricing information as that will be uploaded separately.

*Response required

6.2. Separate Cost File*

Please upload a breakdown of your pricing information here. This information should not be part of your main proposal upload which is why it is requested separately here.

*Response required

6.3. Submittal Confirmation*

Consultant hereby certifies that all information provided within this submittal is accurate to the best of their knowledge and acknowledges that they have provided proof of their authority to submit a Proposals / Statements of Qualifications on behalf of the stated Company Name committing them to the information contained within said submittal.

By checking the "please confirm" box below, you certify the above statement.

*Response required

6.4. Financial Interest Disclosure*

Please download the below documents, complete, and upload.

Financial_Interest_Disclosure_Form_RFP_(4).pdf

*Response required

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This is the start of the file's text. The full file is on GovTribe.

File details come from the government source that posted it. Updated Sep 8, 2026.