REQUEST FOR PROPOSAL

2025-PURB RFP-0085

ON-CALL ENVIRONMENTAL CONSTRUCTION CONSULTING

SERVICES

County of Sacramento

9660 Ecology Lane

Sacramento, CA 95827

RELEASE DATE: December 12, 2025

DEADLINE FOR QUESTIONS: January 2, 2026

RESPONSE DEADLINE: January 16, 2026, 4:00 pm

RESPONSES MUST BE SUBMITTED ELECTRONICALLY TO:

https://secure.procurenow.com/portal/saccounty https://secure.procurenow.com/portal/%7bproject.government.code%7d

County of Sacramento

REQUEST FOR PROPOSAL

On-Call Environmental Construction Consulting Services

1. Introduction

2. General Rules

3. Scope of Work

4. Evaluation and Selection

5. Proposal Format and Content

6. Evaluation Phases

7. Vendor Submissions

Attachments:

A - Attachment 1 County Sample Contract Terms

B - Attachment 2 RFP ATT Proprietary Agreement

Request for Proposal #2025-PURB RFP-0085 Title: On-Call Environmental Construction Consulting Services

1. Introduction

1.1. Summary

The County of Sacramento ("County") is soliciting proposals for on-call consulting services to assist with design, environmental protection, and documentation associated with construction of and improvements to environmental remediation and monitoring facilities at sites operated by the

Department of Waste Management and Recycling in Sacramento County, California.

1.2. Background

Sacramento County owns three landfills which have active groundwater and unsaturated zone monitoring and treatment programs. These are 1) Kiefer Landfill, 2) Elk Grove Landfill, and 3)

Grand Island Landfill. Kiefer Landfill also has active leachate and stormwater management systems. DWMR staff currently performs all routine field and reporting activities for each site. Site documentation, existing monitoring and extraction well information, monitoring reports, and Waste Discharge Requirements (WDRs) for each site are available for review at the State Water Board’s Geotracker website.

Kiefer Landfill

The Kiefer Landfill (KLF) is located near the intersection of Kiefer Boulevard and Grant Line

Road in Eastern Sacramento County. KLF has been in operation since 1967 and has in excess of 30 million tons of waste in place. Approximately 160 acres of the landfill are unlined. 200 acres of landfill are lined, 150 acres of which have been filled. A comprehensive landfill gas

(LFG) collection system has been in operation since 1997. The system currently includes a gas flaring facility, landfill gas to energy plant, and vertical and horizontal extraction wells.

Leachate is currently withdrawn from the landfill and disposed of at a local water treatment and disposal facility. An extensive groundwater and unsaturated zone monitoring network is also in use at the site. Groundwater contamination, primarily by chlorinated ethenes

(currently in the 5 parts per billion [ppb] range), has been attributed to LFG migration, and the site is in corrective action. A 500 gallon per minute (gpm) capacity groundwater treatment system has been in service since 1995. The treatment system discharges to an onsite infiltration basin.

Elk Grove Landfill

The Elk Grove Landfill (EGLF) is located approximately 12 miles south of downtown

Sacramento, near the intersection of Waterman Road and Bond Road. The site is 37 acres in area. EGLF ceased operation in 1977 and received final closure in 1992. The landfill closure consisted of installation of a landfill gas extraction system and placement of a final cover.

Landfill gas is currently being treated by two granular activated carbon (GAC) vessels and discharged to atmosphere. Low levels of volatile organic compounds (VOCs) (primarily chlorinated ethenes, currently in the 1 ppb range) have been detected in downgradient groundwater monitoring wells. As a result of a new regulatory order, in 2024 DWMR commissioned 5 new or converted wells to monitor very shallow groundwater. One of these wells has been initially found to contain low levels of VOCS.

Grand Island Landfill

The Grand Island Landfill (GILF) is located in southern Sacramento County near Isleton. GILF ceased operation in 1979 and a closure cap was installed in 1999. No significant groundwater impacts have been detected at the site. Groundwater and vadose zone monitoring continue to be performed as required by the site’s WDRs.

1.3. Contact Information

Any inquiries or requests regarding this solicitation must be submitted via OpenGov. Contact with unauthorized County personnel during the selection process may result in disqualification.

Project Contact:

Tracy Soth

Senior Contract Services Officer

Email: sotht@saccounty.gov

Phone: (916) 876-6285

Procurement Contact:

Tracy Soth

Senior Contract Services Officer

Email: sotht@saccounty.gov

Phone: (916) 876-6285

Department:

Waste Management and Recycling

Department Head:

Keith Goodrich

Director

1.4. Timeline

Release Project Date December 12, 2025

Question Submission Deadline January 2, 2026, 4:00pm

Question Response Deadline January 9, 2026, 4:00pm

Proposal Submission Deadline January 16, 2026, 4:00pm mailto:sotht@saccounty.gov tel:(916)876-6285 mailto:sotht@saccounty.gov tel:(916)876-6285

2. General Rules

2.1. Important Instructions for Electronic Submittal

The County is accepting electronic proposal submissions. Proposers shall create a FREE account with

OpenGov Procurement by signing up at Sign Up (opengov.com). Once you have completed account registration, browse back to this page, click on "Draft Response", and follow the instructions to submit your electronic proposal.

2.2. General Rules

2.2.1 Overview

This Request for Proposals ("RFP") is an invitation for proposers to submit a proposal to the County. This

RFP does not commit the County to award a contract to any proposer. Submission of a proposal shall neither obligate nor entitle a proposer to enter into a contract with the County.

2.2.2 Proposal format and content

When submitting a proposal, proposers must follow the format and contents detailed in Attachment B.

Failure to do so will likely prolong the evaluation process and could result in a proposal not being considered.

2.2.3 Proposal submission

Proposals must be received BEFORE 4:00 pm on Friday, January 16, 2026 electronically via OpenGov.

Failure to submit a proposal on time may be grounds for rejection of the proposal; however, the County reserves the right, in its sole and absolute discretion, to accept proposals after the proposal due date.

2.2.4 Questions and communication

Questions concerning this RFP must be submitted in the project Q&A section in OpenGov Procurement by 4:00 pmon Friday, January 2, 2026.

Questions received via phone or e-mail to direct points of contact for this RFP will not be considered nor responded to. The County shall respond to questions properly submitted as described above via addenda, if the answer presents a material change to the solicitation, and/or via the Question & Answer section for non-material answers.

By submitting a response, proposer affirms review of all solicitation documents including all questions submitted and answers issued by the County on the project.

2.2.5 Addenda

The County reserves the right to modify this RFP at any time prior to the proposal due date. The County will modify the RFP only by written addenda. Proposal should be based on this RFP document and any formal written addenda. Proposers should not rely on oral statements. Addenda will be posted in

OpenGov Procurement. It is the responsibility of each prospective proposer to assure receipt of all addenda.

2.2.6 County's right to withdraw, cancel, suspend and/or modify RFP

The County reserves the right to withdraw, cancel, suspend, and/or modify this RFP for any reason and https://procurement.opengov.com/signup at any time with no liability to any prospective proposer for any costs or expenses incurred in connection with the RFP or otherwise.

2.2.7 Proposer's right to edit or cancel proposal

Proposers may edit or cancel their proposal in OpenGov Procurement prior to the due date.

2.2.8 Proposals will not be returned

Upon submission, proposals will not be returned.

2.2.9 Public disclosure of proposal documents

The County will treat all information submitted in a proposal as available for public inspection once negotiations with the selected party have been completed. If copies of proposals are included with

Board materials, the County will make proposals available for public inspection once staff has made a recommendation for award.

If a proposer believes protected data is included in its proposal, the proposer shall clearly identify the data and provide the legal basis in support of the asserted classification. Proposer must present such information separately as part of its proposal OR type in bold red letters the term "CONFIDENTIAL" on that specific part or page of the proposal which proposer believes to be confidential. Classification of data as trade secret data will be determined pursuant to applicable law, and, accordingly, merely labeling data as "trade secret" does not necessarily make the data protected under any applicable law.

In order for the County to assert the confidentiality of any such information in the event a California

Public Record Act request is received, the proposer must request, execute and submit a County-prepared written agreement to defend and indemnify the County for liability, costs and expenses incurred in asserting such confidentiality as part of the proposal. A copy of that written agreement is attached as Attachment 2.

The final determination of whether the County will assert a proposer's claim of confidentiality shall be at the sole discretion of the County. Any information determined to be non-confidential shall be considered public record. If the County determines that your information does not meet the criteria for confidentiality, you will be notified of the County's intent to release the public record pursuant to any

California Public Records Act request.

The proposer agrees, as a condition of submitting its proposal, that the County will not, as between the parties, be liable or accountable for any loss or damage, which may result from a breach of confidentiality related to the proposal. The proposer agrees to indemnity and hold the County, its officials, agents, and employees harmless from all claims arising out of, resulting from, or in any manner attributable to any violation of any provision of the California Public Records Act, including legal fees and disbursements paid or incurred to enforce this provision.

2.2.10 Proposer's costs

The County shall not be responsible for any costs incurred by proposer in connection with this RFP.

Proposer shall bear all costs associated with proposal preparation, submission, and attendance at interviews, or any other activity associated with this RFP or otherwise.

2.2.11 Proposer's ideas

To the extent permitted by law, the County reserves the right to use any or all ideas, concepts, or other information provided in any proposals. Selection or rejection of the proposal does not affect this right.

2.2.12 Collusion

If the County determines that collusion has occurred among proposers, none of the proposals of the participants involved in the collusion shall be considered. The County's determination shall be final.

2.2.13 Conflict of interest

The proposer affirms that to the best of its knowledge the submission of its proposal, or any resulting contract, does not present an actual or perceived conflict of interest. The proposer agrees that should any actual or perceived conflict of interest become known, it will immediately notify the County and will advise whether it will or will not avoid, mitigate, or neutralize the conflict of interest.

The County may make reasonable efforts to avoid, mitigate, or neutralize a conflict of interest by a proposer. To avoid a conflict of interest by a proposer, the County may utilize methods including disqualifying a proposer from eligibility for a contract award or cancelling the contract if the conflict is discovered after a contract has been issued. The County may, at its sole and absolute discretion, waive any conflict of interest.

3. Scope of Work

The selected consultant will be responsible for the on-call support services related to engineering design, biological (habitat preservation) and environmental pre-design and pre-construction surveys, permitting support, geological logging and well design services during construction, and other tasks related to construction, improvement, or destruction projects.

The consultant’s staff shall include a registered geologist or civil engineer that has significant hydrogeological expertise and has designed and logged groundwater wells, and a staff biologist and an electrical engineer.

DWMR staff will issue task orders for all work to be performed under this contract. One to two-page scopes of work and associated cost proposals will be requested for tasks with well-defined scopes and schedules. Tasks may include any of the following (percentages of contract dedicated to each task category are estimates only):

Task 1 – Consulting Support for Groundwater Monitoring and Extraction Wells (approx. 40%)

New groundwater monitoring wells and/or extraction wells may be installed at DWMR sites.

The consultant would be expected to provide consulting services related to installation of these new wells. At KLF, site assessment of biological resources will be required. Design and boring log preparation for new groundwater wells would be directed by the consultant. Short-term pumping tests for new wells and boreholes may also be designed and directed by the consultant. Short technical memorandums containing summaries of activities conducted, pump test results, and rough estimates of hydraulic conductivity or transmissivity may be requested from the consultant. DWMR is also planning to decommission wells at several sites, and the consultant may be expected to provide assistance in well destruction process design and approval.

Task 2 – Consulting Support for Permitting, Design, and Operation of Treatment Facilities for

Contaminated Water (approx. 40%)

New groundwater extraction facilities are currently being installed at DWMR sites, and more extraction and/or treatment facilities may be needed. These facilities may be tied into existing groundwater treatment systems, or could be standalone systems or hybrid systems. Leachate treatment facilities for PFAS compound removal may also soon be required. The consultant could be expected to provide site assessment, environmental permitting, design services, and/or operational procedures related to this new construction. The consultant’s staff for this work should include biologists, civil engineers, electrical engineers and mechanical engineers. Plans and specifications may be required. The consultant should have experience in both electric and pneumatic powered water pumping systems.

Task 3 – Additional Construction Support as Requested (approx. 20%)

DWMR has, and may receive regulatory or other agency orders for corrective action with respect to its facilities. Existing environmental control facilities may require replacement. The consultant may be asked to assist DWMR staff in pre-design, design, and construction-related support in responding to these specific requirements. Facilities to address PFAS contamination or LFG control/treatment, for example, may be required.

The initial term of the agreement shall be for a 24-month period, based on contract start date

(anticipated November 1, 2025). The agreement may be extended for up to three additional one-year terms upon mutual consent.

4. Evaluation and Selection

4.1 Proposal evaluation and recommendation for selection

The County reserves the following rights, to be exercised in the County’s sole and absolute discretion: 1) to determine whether any aspect of a proposal satisfactorily meets the criteria established in this RFP; 2) to seek clarification or additional information from any proposer; 3) to negotiate, sequentially or simultaneously, pricing and/or terms with any proposer or vendor; 4) to reject any or all proposals with or without cause; 5) to waive any irregularities or informalities in a proposal; 6) to cancel or amend by addenda this RFP, in part or entirely; 7) to award multiple contracts to proposers; and/or 8) award a contract to a vendor that did not submit a proposal.

Evaluation of proposals by a selection committee, evaluation panel, County staff, a technical advisory committee, or by another group, individual or entity is advisory only. The County of Sacramento Board of Supervisors or its designee may consider or reject such evaluation(s) for any or all proposals. Such evaluations are for the sole benefit of the County of Sacramento Board of Supervisors or its designee, and as such, they are not binding upon the County, nor may they be relied upon in any way by a

Proposer.

The County will issue a Notice of Intent to Award (NOIA) and/or a Notice of Award (NOA), as applicable, to be published on OpenGov Procurement naming County’s selected consultant following completion of the evaluation process.

4.2 Evaluation of responsiveness

The County will consider all the material submitted by a proposer to determine whether the proposer’s offer is in compliance with the terms and conditions set forth in this RFP. Proposals that do not comply with the provisions in this RFP may be considered nonresponsive and may be rejected.

4.3 Evaluation of responsibility

To determine whether a Proposer is responsible, the County will consider the Proposer’s general qualifications to perform the requested services in a satisfactory manner; financial responsibility;

integrity; skill; past performance; and ability. Proposals from proposers considered non-responsible will be rejected.

4.4 Evaluation panel and evaluation criteria

After review of each responsive proposal, the County may award a contract to a successful proposer based on the evaluation criteria, or it may establish a short list of proposers for further consideration.

The short list of proposers may be asked to provide additional information. The short list of proposers may also be asked to attend an in-person or telephone interview/presentation, as determined by the

County in its sole discretion.

Evaluation criteria shall include the following:

1. Quality of the proposed services, including:

A. How well the proposed services meets the requirements as stated in the RFP

B. Demonstrated understanding of the scope of work and County’s needs

2. Experience and qualifications, including:

A. Experience

B. Expertise of staff

C. Capability

D. Past performance

E. References

3. Quality of proposal compliance, including:

A. Compliance with proposal format and content

B. Acceptance of the County’s terms and conditions (Attachment 3)

4. Cost of proposed services including:

A. Unit Rates

B. Overall value of Services, based on item scores above

4.5 Execution of contract

The selected proposer shall execute an agreement with the County of Sacramento, using the standard consulting agreement (Attachment 1). Any requested revisions, deletions, or additions, to the language in the attached sample agreement shall be clearly set forth in the proposal for the County’s consideration.

Before a contract becomes effective between the County and any proposer, the contract must be reviewed by County Counsel and the contract award must be approved by the County Board of

Supervisors or its designee. If for any reason the County Board of Supervisors or its designee does not ratify and sign the contract then there are no binding obligations whatsoever between the County and the proposer relative to the proposed contract.

5. Proposal Format and Content

Proposals shall not exceed 10 pages and must adhere to the following format:

5.1 Cover letter

Proposers must submit a cover letter that includes the following:

a. A statement that the proposal is effective for a period of one hundred eighty (180) days or the date the contract takes effect, whichever is later;

b. A statement confirming that the proposer has reviewed and agrees to be bound by County of

Sacramento Terms and Conditions (Attachment 1) including insurance provisions; or, alternatively, a statement confirming that the proposer has reviewed and agrees to be bound by County of Sacramento

Terms and Conditions (Attachment 1), excluding only those provisions that have been redlined for negotiation purposes and are included in their Proposal;

c. A statement that the proposer does not have an actual or perceived conflict of interest regarding this

RFP or in submission of their proposal; or alternatively, a statement explaining any conflict of interest and how to avoid, mitigate or neutralize the conflict;

5.2 Proposal

The proposal must contain the following information (and in the same order):

a. A brief profile of the proposer, including the size, organizational structure and history.

b. A plan for delivering services consistent with the scope of work in section 3, including but not limited to the following:

• description of the proposed services

• procedures for carrying out services

• description of prior experience performing such services

• capacity to perform the services, including availability of staff and resources

d. Name of project or account manager to be assigned to the County.

e. Resume of key staff. Information for key staff must include:

• professional credentials;

• education or certifications;

• expertise and capability;

• applicable professional affiliations and accreditations, and

• applicable professional experience.

f. A narrative of the experience of the proposer in implementing similar services for other clients, including governmental clients similar in size to Sacramento County, if available.

g. Three (3) references for whom the proposer has provided services similar to those described in this

RFP. The County reserves the right to check other references not provided by the proposer. The following information is required for each reference:

• customer name and address;

• point of contact (name, telephone number, email) for contractual/administrative matters and technical performance;

• period of contract performance; and

• description of work performed.

Emphasis should be given to providing references where 1) the resources used are the same or mostly the same as those who will be used for the County’s purposes, and 2) the references are governmental organizations of similar size to the County. The County may request additional references from proposer.

h. Pricing in the form of a proposed rate sheet. Rate sheets should include labor and other expenses which may be necessary to complete work outlined in the scope of work. Markup fees for materials, equipment rentals, and similar should be included in proposed rate sheets and adhere to County requirements. Rate sheets should include a broad scope of items to reflect the nature of work requested and minimize the need to amend pricing tables during the life of the contract.

Rate sheets shall clearly state effective date ranges and/or expiration dates and shall be in effect for the minimum of the initial 2-year contract period.

6. Evaluation Phases

No. Evaluation Criteria Scoring Method Weight (Points)

1. Quality of the proposed services N/A N/A

2. Experience and qualifications N/A N/A

3. Quality of proposal compliance N/A N/A

4. Cost N/A N/A

7. Vendor Submissions

7.1. Certification of Independent Contractor Status*

"I hereby certify that the Contractor/Consultant firm employs five or more full-time employees. “Full-time”, as defined by the Internal Revenue Service, means persons employed for 20 or more hours per week, and excludes temporary employees whose term of employment will be less than one (1) month.

This certification satisfies the Internal Revenue Service criteria for treatment of the above-named consultant as an independent contractor, not an employee for tax withholding purposes."

☐ Yes, I certify that the firm has five (5) or more full-time employees.

☐ No, I certify that the firm does not have five (5) or more full-time employees, and the firm provides services to the general public. (The County will conduct a tax determination review if this option is selected.)

*Response required

7.2. Contractor Certification of Compliance, part 1*

WHEREAS it is in the best interest of Sacramento County that those entities with whom the County does business demonstrate financial responsibility, integrity and lawfulness, it is inequitable for those entities with whom the County does business to receive County funds while failing to pay court-ordered child, family and spousal support which shifts the support of their dependents onto the public treasury.

Therefore, in order to assist the Sacramento County Department of Child Support Services in its efforts to collect unpaid court-ordered child, family and spousal support orders, the following certification must be provided by all entities with whom the County does business:

Contractor/Consultant hereby certifies that either:

☐ the Contractor/Consultant is a government or non-profit entity (exempt), or

☐ the Contractor/Consultant has no Principals Owners (25% or more) (exempt), or

☐ each Principal Owner (25% or more) does not have any existing child support orders, or

☐ Contractor/Consultants Principal Owners are currently in substantial compliance with any court-ordered child, family and spousal support order, including orders to provide current residence address, employment information, and whether dependent health insurance coverage is available. If not in compliance, Principal Owner has become current or has arranged a payment schedule with the

Department of Child Support Services or the court.

*Response required

7.3. Contractor Certification of Compliance, part 2*

New Contract/Consultant shall certify that each of the following statements is true:

a. Contractor/Consultant has fully complied with all applicable state and federal reporting requirements relating to employment reporting for its employees; and

b. Contractor/Consultant has fully complied with all lawfully served wage and earnings assignment orders and notices of assignment and will continue to maintain compliance.

NOTE: Failure to comply with state and federal reporting requirements regarding a Contractor's employees or failure to implement lawfully served wage and earnings assignment orders or notices of assignment constitutes a default under the contract; and failure to cure the default within 90 days of notice by the County shall be grounds for termination of the contract. Principal Owners can contact the

Sacramento Department of Child Support Services at 1-866-901-3212, by writing to P.O. Box 269112, Sacramento, 95826-9112, or via the Customer Connect website at www.childsup.ca.gov .

☐ Please confirm

*Response required

7.4. Proposal (without cost proposal)*

Upload your complete Proposal here. Do not include your cost proposal (Rate Sheet) in this section.

*Response required

7.5. Cost proposal (separate)*

Upload your cost proposal (Rate Sheet) here. Confirm that your cost proposal is not attached with your

Proposal and is attached separately here.

*Response required

7.6. Confidential sections of proposal (if applicable)

The County will treat all information submitted in a proposal as available for public inspection once the

County has awarded a contract. If you believe that you have a legally justifiable basis under the

California Public Records Act (Government Code section 6250 et. seq.) for protecting the confidentiality of any information contained within your proposal, you must identify any such information, together with the legal basis of your claim in your proposal, and present such information in this section as part of your proposal response package. The final determination of whether the County will assert a proposer's claim of confidentiality shall be at the sole discretion of the County. Click "file upload" below to upload any proposal documents you consider to be confidential documents.

7.7. Proposed Contract Exceptions

If proposing any exceptions to the County's Sample Contract, upload a redlined revision of the Sample

Contract attached to this solicitation here. Any submissions are for negotiation purposes only.

If no exceptions are proposed, please skip this question.

7.8. Provide the full contact name, title, and e-mail of the signatory for your firm. Provide contact information for the contract manager for your firm in order to distribute contract documents, including other recipients requiring a copy, if awarded.*

Signatory: name, title, email

Contract manager/admin: name, phone, email http://www.childsup.ca.gov/

7.9. PaymentWorks Contact*

Please provide the name and e-mail for a finance point-of-contact for your firm that will receive an invitation to complete the vendor registration process on the County's PaymentWorks portal.

To clarify, if you are set-up with other agencies using PaymentWorks, that information is not available to the County, so you must complete this process for the County.