5-001 RFP 27000830.pdf

CITY OF MIDLAND | TURNKEY ARSENIC PRETREATMENT SERVICES | TECHNICAL RFP

T-Bar Wellfield | September 23, 2026 | Page 1

CITY OF MIDLAND, TEXAS

REQUEST FOR PROPOSALS

TURNKEY ARSENIC PRETREATMENT SERVICES

27000830

T-BAR WELLFIELD

Proposals for this requirement will be accepted until 2:00 P.M. on December 9, 2026

Proposals May be Mailed or Delivered to:

City Secretary

City of Midland

Suite 330

P.O. BOX 1152

Midland, Texas 79702-1153

(300 N. Loraine, Suite 330 Midland, TX 79701)

No Late Proposals Will Be Accepted

NOTICE TO PROPOSERS:

1. THE ATTACHED CONTRACT AND INSURANCE REQUIREMENTS ARE NON-NEGOTIABLE. MODIFICATIONS BY PROPOSER/CONTRACTOR OF ANY MATERIAL TERM(S) TO THE CONTRACT DOCUMENTS WILL BE DEEMED A NON-RESPONSIVE PROPOSAL. NON-RESPONSIVE PROPOSALS WILL BE REJECTED. PROPOSER/CONTRACTOR MUST BE WILLING TO SIGN THE CONTRACT AS IS AND WITHOUT MODIFICATIONS, PROVIDE PROPERLY EXECUTED BONDS (IF APPLICABLE) AND PROVIDE INSURANCE SPECIFICALLY AS REQUIRED WITHIN THE CONTRACT DOCUMENTS WITHIN 21 DAYS OF THE DATE OF THE

TRANSMITTAL LETTER.

2. IF THE SELECTED PROPOSER/CONTRACTOR CANNOT MEET THE REQUIREMENTS OF PARAGRAPH 1, THEN THE CITY

RESERVES THE RIGHT TO AWARD THIS PURCHASE TO ANOTHER PROPOSER.

3. IMPORTANT NOTICE – IF THE CONTRACT DOCUMENTS REQUIRE WORKER’S COMPENSATION INSURANCE, PROPOSER/CONTRACTOR MUST CARRY WORKER’S COMPENSATION INSURANCE TO BE ELIGIBLE FOR THIS CONTRACT. IF YOU CANNOT PROVIDE WORKER’S COMPENSATION INSURANCE AS REQUIRED BY STATE OF TEXAS STATUTE WE RESPECTFULLY

REQUEST THAT YOU “NO BID” THIS WORK

4. COMPLIANCE. – COMPANY AGREES THAT IT SHALL COMPLY WITH TEXAS GOVERNMENT CODE SECTION 2252.908, ET SEQ., AS AMENDED. COMPANY AGREES THAT IT SHALL COMPLY WITH TEXAS LOCAL GOVERNMENT CODE SECTION 176.006, ET

SEQ., AS AMENDED.

5. PUBLIC INFORMATION. TO THE EXTENT THAT PROPOSER IS SUBMITTING A PROPOSAL FOR A CONTRACT DESCRIBED BY SECTION 552.371 OF THE TEXAS GOVERNMENT CODE, PROPOSER AGREES AS FOLLOWS IN ACCORDANCE WITH SECTION 552.372(B) OF THE TEXAS GOVERNMENT CODE: THE REQUIREMENTS OF SUBCHAPTER J, CHAPTER 552, GOVERNMENT CODE, MAY APPLY TO THIS PROPOSAL, AND THE CONTRACTOR OR VENDOR AGREES THAT THE CONTRACT CAN BE TERMINATED IF THE CONTRACTOR OR VENDOR KNOWINGLY OR INTENTIONALLY FAILS TO COMPLY WITH A REQUIREMENT OF THAT

SUBCHAPTER.

T-Bar Wellfield | September 23, 2026 | Page 2

SCHEDULE OF EVENTS

RFP 27000830

For

TURNKEY ARSENIC PRETREATMENT SERVICES

Issue Date October 21, 2026

Cutoff Date for inquiries and clarification

November 18, 2026

Mandatory Site Visit November 04, 2026

Proposal Due Date December 9, 2026

Intended Date for Contract Award

January 2027

Initial Contract Term Ten (10) years

Renewal Options Two (2) additional five-year terms, at the City's option

*These dates are our intended schedule; however, they may be changed as necessary without further notice.

T-Bar Wellfield | September 23, 2026 | Page 3

SPECIAL TERMS AND CONDITIONS

Proposal Requirements /Terms

1. Unless otherwise called for, the number of copies specified in the RFP, shall be submitted typewritten or printed in ink. Many Requests for Proposals are in a word format that can be completed on your computer and will be noted on the cover page if available.

2. Each proposal should be placed in a separate envelope completely and properly identified with the RFP number, due time and date. Proposal must be time stamped at the appointed receipt location before the hour and date specified for the proposal receipt. Responsibility for having the proposal properly marked and to the opening location by the specified date and time is solely the offeror’s. All copies of the proposal may be delivered in the same box/package.

3. Any Proposal may be withdrawn in writing prior to the date and time set for receipt of proposals. Any proposals not so withdrawn shall constitute an irrevocable offer, for a minimum period as stated in the RFP following the final acceptance date, to provide the commodity or service set forth in the attached specifications, or until a selection has been made by the City.

4. Late proposals will not be accepted under any circumstances.

5. Proposal should give full firm name and address of Offeror. Failure to manually sign the proposal will disqualify it. The person signing the proposal should show title or authority to bind his/her firm in contract. Insert your Federal Employer’s Identification Number _____________________ or Sole owner should enter

SSN ______-____-______.

6. Purchases made for City use are exempt from State Sales Tax and Federal Excise Tax. Do not include tax in your proposal. Tax exemption certificates will be furnished by the City upon request.

7. Telephone proposals are not acceptable when in response to an RFP.

Conditions

The City of Midland is requesting proposals with the intent of awarding a contract for the requirement contained in this RFP. However, the City is not obligated to award a contract on this solicitation and reserves the right to reject any and all proposals and award the proposal to best serve the interests of the City.

1. Offerors electing to respond to this RFP are responsible for all costs of proposal preparation. The City is not liable for any costs incurred by a offeror in response to this RFP.

2. No public disclosures or news releases pertaining to this RFP shall be made without prior written approval from purchasing.

3. In case of a tie between two or more offerors, the award will be made in accordance with preferences as outlined by statute.

4. The Offeror agrees to protect the City from claims involving infringement of patents or copyrights.

5. The Offeror hereby assigns to Purchaser, any and all claims for overcharges associated with any contract resulting from this RFP which arise under the antitrust laws of the United States 15 U.S.C.A. Section 1, et seq. 1973 and which arise under the antitrust laws of the State of Texas, Texas Business and Commercial Code Ann. Sec. 15.01, et seq. (1967).

6. No substitutions or cancellation permitted without the written approval of the City Purchasing Agent.

Deliveries made pursuant to a resulting contract shall be made during normal working hours only, unless approval for late delivery has been obtained.

7. Contractor shall submit two copies of an itemized invoice to Accounts Payable, The City of Midland, Texas, P.O. Box 1152, Midland Texas 79702. Each copy of the invoice shall reference the P.O. and the RFP numbers.

8. In the event of a conflict between the standard proposal requirements and conditions and the attached detail specification, the detail specifications shall govern.

9. Governing Law & Venue: This agreement shall be governed by and construed in accordance with the laws of the State of Texas. Venue for an disputes or lawsuits arising from the performance of this contract shall be exclusively in Midland County, Texas. The parties agree that all performance under this contract shall take place in Midland, County, Texas. The Contractor and City agree that all payments made under this contract shall take place in Midland County, Texas.

10. This obligation and undertakings of each of the parties to this contract shall be deemed to have been performed in Midland County, Texas.

T-Bar Wellfield | September 23, 2026 | Page 4

Table of Contents

1. Solicitation Overview

2. Project Background and Existing Conditions

3. Project Objectives

4. Minimum Qualifications and Mandatory Requirements

5. Scope of Services

6. Technical and Performance Requirements

7. Performance Verification and Acceptance

8. Operations, Maintenance, and Staffing

9. Treatment Residuals and Waste Management

10. Electrical Power, Controls, and SCADA

11. Site, Civil, Mechanical, and Construction Requirements

12. Regulatory Compliance and Permitting

13. Commercial and Contract Requirements

14. Proposal Organization and Required Submittals

15. Pricing Proposal and Evaluated Cost

16. Evaluation and Selection

17. Technical Contract Exhibits and Forms Exhibit A - Representative Source Water Analysis Exhibit B - T-Bar Wellfield Revised Layout Exhibit C - Selected Existing Facility Drawings Exhibit D - Full As-Built Drawing Set (Separate Electronic File)

T-Bar Wellfield | September 23, 2026 | Page 5

1. Solicitation Overview

1.1 Purpose

The City of Midland (the City) is soliciting competitive proposals from qualified firms to provide complete turnkey arsenic pretreatment services for groundwater produced from the City-owned T-Bar Wellfield. The primary and controlling purpose of this procurement is to achieve reliable and consistent reduction of naturally occurring arsenic before groundwater sourced from the TBar Wellfield enters the City's transmission system and downstream disinfection facilities.

The Contractor shall provide all professional services, permitting support, equipment, structures, piping, electrical power delivery, controls, instrumentation, communications, labor, treatment media and chemicals, testing, operation, maintenance, residual management, reporting, site restoration, and other lifecycle services necessary to provide an uninterrupted treatment service and fulfill the requirements of this RFP and the final Agreement. The Contractor shall own, operate, and maintain the system throughout the contract term unless the final agreement expressly provides otherwise.

1.2 Best-Value Procurement Intent

The City intends to select the proposal that provides the best overall value. Award will not be based on price alone. The City may determine that a proposal with a higher unit price provides better value because it offers stronger arsenic performance, a larger compliance margin, demonstrated reliability and consistency, lower risk, less waste, superior service, or lower long-term cost.

The published evaluation criteria in Section 16 will control the scoring. Subject to final Purchasing and Legal review, the solicitation is intended to be consistent with applicable Texas municipal procurement requirements, including consideration of purchase price, quality, the extent to which the services meet the City's needs, and total long-term cost.

1.3 Contract Term

Initial term: Ten (10) years beginning on the Commercial Operation Date.

Renewal options: Two (2) additional five-year terms, exercised at the City's sole discretion and subject to satisfactory contractor performance, appropriations, and all applicable City approval requirements.

Maximum potential term: Twenty (20) years.

No automatic renewal: Each extension requires written authorization by the City.

1.4 Procurement Schedule

Milestone Date / Time

RFP issued 10/212026

Mandatory pre-proposal conference and site visit 11/4/2026

Deadline for written questions 11/18/2026

Final addendum issued 11/30/2026

Proposals due 12/9/2026

Interviews / clarifications, if requested 12/18/2026

Optional site-specific validation or pilot testing TBD

Anticipated Council award January 2027

Agreement execution/Agreement Effective Date TBD

T-Bar Wellfield | September 23, 2026 | Page 6

Milestone Date / Time

Notice to Proceed 01/01/2027

Startup and Commissioning Depending on bid award

Performance Test (depends on milestone timelines for 5 MGD or 12 MGD, we can have both… or one your choice). I’d make a note that whatever we set the performance to, has to be comparable at 5 and 12…

Required or Target Commercial Operational Date (whatever we decide this will be:

Established in writing contingent of successful completion of the start-up, commissioning and what we set as acceptance criteria).

Performance Test (depends on milestone timelines for 5 MGD or 12 MGD, we can have both… or one your choice). I’d make a note that whatever we set the performance to, has to be comparable at 5 and 12…

Contract Term (Depending on which structure you want to follow, too many dates might get confusing, but I do think this depends on proposed construction times).

1.5 Mandatory Site Visit

Attendance at the pre-proposal conference and T-Bar site visit is mandatory on Wednesday, November 4, 2026. Failure to attend or to provide the required documentation of attendance constitutes failure to satisfy a mandatory requirement and may result in rejection of the proposal as nonresponsive. The visit is intended to allow proposers to inspect the tank site, access, available land, existing piping, electrical facilities, communications, drainage, environmental conditions, and construction constraints.

The Site Visit is located at 12215 CR 101 Kermit, TX 79745.

The site visit does not relieve the proposer of responsibility for independent investigation. Each proposer shall verify field dimensions, elevations, hydraulic conditions, utility availability, equipment access, constructability, and all conditions affecting the proposed service.

1.6 Escalation

Annual pricing adjustments to contract extensions following the initial contract term, if applicable, shall not exceed seventy-five percent (75%) of the rate of increase in the cost of living as reflected in the Federal Bureau of Labor Statistics, Consumer Price Index (CPI) for all Urban Consumers (1982-84=100; through November 1991 = 137.8) or any other index which may be substituted in the future. The CPI for the latest twelve (12) month period of the contract will be the CPI base on which later adjustments are computed. Each time an adjustment is made, the earlier CPI base will be replaced by the adjusted CPI base. The percentage of adjustment to contract prices shall in no event exceed the percentage change in the index.

1.7 Proposal Waivers:

WAIVER OF ATTORNEY FEES: BY SUBMITTING THIS PROPOSAL, OFFEROR AGREES

TO WAIVE AND DOES HEREBY KNOWINGLY, CONCLUSIVELY, VOLUNTARILY

AND INTENTIONALLY WAIVE ANY CLAIM IT HAS OR MAY HAVE IN THE FUTURE

AGAINST CITY REGARDING THE AWARD OR ATTORNEY’S FEES, WHICH ARE IN

ANY WAY RELATED TO THIS PROPOSAL, OR THE CONSTRUCTION,

INTERPRETATION OR BREACH OF THIS PROPOSAL. OFFEREOR SPECIFICALLY

AGREES THAT IF OFFEROR BRINGS OR COMMENCES ANY LEGAL ACTION OR

PROCEEDING RELATED TO THIS PROPOSAL, THE CONSTRUCTION,

T-Bar Wellfield | September 23, 2026 | Page 7

INTERPRETATION, VALIDITY OR BREACH OF THIS PROPOSAL, INCLUDING, BUT

NOT LIMITED TO, ANY ACTION PURSUANT TO THE PROVISIONS OF THE TEXAS

UNIFORM DECLARATORY JUDGMENTS ACT (TEXAS CIVIL PRACTICE AND

REMEDIES CODE SECTION 37.001, ET SEQ., AS AMENDED), OR CHAPTER 271 OF

THE TEXAS LOCAL GOVERNMENT CODE, OFFEROR AGREES TO ABANDON,

WAIVE AND RELINQUISH ANY AND ALL RIGHTS TO THE RECOVERY OF

ATTORNEY’S FEES TO WHICH OFFEROR MIGHT OTHERWISE BE ENTITLED.

OFFEROR AGREES THAT THIS IS THE VOLUNTARY AND INTENTIONAL

RELINQUISHMENT AND ABANDONMENT OF A PRESENTLY-EXISTING KNOWN

RIGHT. OFFEROR ACKNOWLEDGES THAT IT UNDERSTANDS ALL TERMS AND

CONDITIONS OF THIS PROPOSAL. OFFEROR FURTHER ACKNOWLEDGES AND

AGREES THAT THERE WAS AND IS NO DISPARITY OF BARGAINING POWER

BETWEEN CITY AND OFFEROR. THIS SECTION SHALL NOT BE CONSTRUED OR

INTERPRETED AS A WAIVER OR GOVERNMENTAL IMMUNITY AND SHALL

SURVIVE THE TERMINATION OF THE CONTRACT.

OFFEROR IS RELYING ON ITS OWN JUDGMENT. OFFEROR HAD THE OPPORTUNITY TO

DISCUSS THESE PROPOSAL DOCUMENTS WITH COMPETENT LEGAL COUNSEL

PRIOR TO SUBMISSION OF THE PROPOSAL OR EXECUTION OF THE CONTRACT.

WAIVER:

BY SUBMITTING A PROPOSAL, THE OFFEROR AGREES TO WAIVE AND DOES HEREBY

VOLUNTARILY AND INTENTIONALLY WAIVE, ABANDON AND RELINQUISH ANY

CLAIM THE OFFEROR HAS OR MAY HAVE IN THE FUTURE AGAINST THE CITY OF

MIDLAND, TEXAS, AND THE CITY’S EMPLOYEES, AGENTS AND OFFICERS,

ARISING OUT OF OR IN ANY WAY CONNECTED WITH THE FOLLOWING:

THE ADMINISTRATION, EVALUATION OR RECOMMENDATION OF ANY PROPOSAL;

WAIVER OR DELETION OF ANY OF THE REQUIREMENTS UNDER THE PROPOSAL

DOCUMENTS OR THE CONTRACT DOCUMENTS;

ACCEPTANCE OR REJECTION OF ANY PROPOSALS; OR AWARD OF THE CONTRACT.

BY SUBMITTING A PROPOSAL, THE OFFEROR ACKNOWLEDGES THAT THE OFFEROR

UNDERSTANDS ALL OF THE TERMS OF THE PROPOSAL DOCUMENTS AND

CONSENTS TO THE PROPOSAL PROCESS AND THE POSSIBILITY OF A

NEGATIVE ASSESSMENT. BY SUBMITTING A PROPOSAL, THE OFFEROR

ACKNOWLEDGES AND AGREES THAT THERE WAS AND IS NO DISPARITY OF

BARGAINING POWER BETWEEN THE OFFEROR AND THE CITY OF MIDLAND,

TEXAS. THE OFFEROR AGREES THAT THIS IS THE INTENTIONAL

RELINQUISHMENT OF A PRESENTLY EXISTING KNOWN RIGHT. BY SIGNING THE

PROPOSAL AND/OR BELOW, YOUR COMPANY AGREES TO THE ABOVE

WAIVER(S).

BY SIGNING THE EXECUTION OF OFFER, YOUR COMPANY AGREES TO THE ABOVE

WAIVER(S). IF THIS FORM IS NOT SIGNED AND INCLUDED WITH YOUR

PROPOSAL DOCUMENTS YOUR PROPOSAL WILL BE CONSIDERED NON-

RESPONSIVE AND WILL BE REJECTED.

1.8 TEXAS PUBLIC INFORMATION ACT

Notwithstanding any other provisions, this request for proposals, along with any associated contract, is subject to the Texas Public Information Act.

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2. Project Background and Existing Conditions

2.1 T-Bar Wellfield

The T-Bar Wellfield is a major groundwater source in the City's water-supply portfolio. Groundwater produced is collected from the wellfield and conveyed to the high-service pump station and ground storage tank facilities before entering the transmission system for delivery to Midland. Exhibit B provides the revised wellfield layout.

The complete historic as-built drawing set will be made available as a separate electronic exhibit.

2.2 Existing Treatment and Downstream Disinfection

Currently, there is no water treatment process located at the T-Bar Wellfield. The City adds chlorine and free ammonia at existing facilities near the Midland city limits. The proposed arsenic pretreatment system will therefore be located upstream of the City's existing chloramination point.

The Contractor shall ensure that its treatment process, chemicals, residual oxidants, pH and alkalinity changes, dissolved constituents, and byproducts are compatible with the current downstream chlorine and free-ammonia addition. The proposal shall identify any process chemical, residual, or water-quality change that could potentially affect chloramine formation, corrosion or scale control, taste and odor, disinfection byproduct formation, downstream equipment, or City operations, and shall describe the measures proposed to prevent, mitigate, or otherwise manage those potential effects.

The treatment process shall not achieve arsenic control by materially degrading overall water quality or by increasing any regulated constituent, secondary constituent, treatment chemical, residual, or byproduct to a concentration that creates a new compliance obligation, impairs the City's ability to comply with any applicable TCEQ or EPA drinking-water requirement, or adversely affects downstream treatment or infrastructure. The proposal shall provide an influent-to-effluent water-quality impact matrix identifying each expected change, its normal and maximum value, and any resulting downstream operating or regulatory requirement.

2.3 Seasonal Flow Requirements

Operating Condition Required Flow Approximate Flow

Winter operating condition 5.0 MGD 3,472 gpm

Summer operating condition 12.0 MGD 8,333 gpm

Normal turndown and intermediate operation Between 5.0 and 12.0 MGD Continuous and stable operation required

The system shall be capable of continuous operation throughout the stated flow range. The City may vary flow within the range based on demand, source availability, maintenance, and operational needs. The City does not guarantee a minimum annual volume unless expressly stated in the final agreement. The treatment system shall maintain all required treatment performance standards throughout the stated flow range, including during changes between operating conditions.

2.4 Proposed Tie-In Area

The anticipated treatment-system tie-in will be at the ground storage tank facilities at the T-Bar Intermediate.

Selected as-built drawings indicate an existing 2.0-million-gallon ground storage tank, space originally identified for a future tank, and existing 36-inch piping serving the high-service pump station. These descriptions are provided for proposal development only; each proposer shall verify actual conditions and propose the final hydraulic arrangement. A site at the T-Bar well field is also acceptable.

The City understands that adequate site area is generally available and is not imposing a fixed treatment footprint at this stage. The Contractor shall nevertheless minimize permanent disturbance, maintain required access, protect existing facilities, and submit a proposed site plan identifying all permanent and temporary uses.

T-Bar Wellfield | September 23, 2026 | Page 9

2.5 Representative Source Water

Exhibit A contains a representative analysis of T-Bar source water. The analysis is provided to assist proposers in developing their treatment approach; it is not a warranty that all wells or all operating conditions will have identical water quality. The representative analysis identifies arsenic as the primary treatment driver and reflects other constituents that may affect arsenic speciation, media capacity, oxidation, adsorption, filtration, waste generation, and process selection.

PROPOSER RESPONSIBILITY

Each proposer is responsible for reviewing Exhibit A and all available source-water information, conducting the confirmatory or, conducting any additional sampling it considers necessary to support its proposed treatment process and performance guarantee, identifying all raw-water assumptions and limitations, and designing a process suitable for reasonably expected wellfield variability.

Any raw-water condition or limitation that could affect treatment performance or the proposed guarantee must be stated clearly and identified in the proposal. Silence will be interpreted as acceptance of the representative analysis and normal source variability. The proposer will be deemed to have accepted the representative source-water information and reasonably expected wellfield variability as the basis for its proposed treatment process and performance guarantee.

2.6 Existing Drawings

Reference Description Use

Exhibit B T-Bar Ranch - City of Midland Revised wellfield layout, dated February 27, 2018

General source and wellfield orientation

Exhibit C-1 Drawing C-HSPS-101 - High Service Pump Station Overall Site Plan Tank-site layout and existing/future facility areas

Exhibit C-2 Drawing M-HSPS-101 - High Service Pump Station Operating Floor Plan

Existing 36-inch suction/discharge piping and pump-station arrangement

Exhibit C-3 Drawing E-HSPS-701 - High Service Pump Station One-Line Diagram Existing electrical configuration for reference only

Exhibit D TBar_as-built_Dwgs_Combined Set.pdf - 355 pages Complete historical design/as-built reference, distributed separately

The drawings are provided for proposal development and reference purposes only. The drawings are historical records and may not show subsequent modifications or current field conditions. They are not contract documents for the proposed treatment facility and shall not be relied upon without field verification.

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3. Project Objectives

3.1 Primary Objective - Arsenic Control

The primary objective is to provide a dependable, full-service treatment process that consistently achieves treated-water arsenic concentrations meeting the contractual performance requirements and applicable drinking-water standards, while maintaining a meaningful operating margin below the applicable arsenic maximum contaminant level, under winter, summer, startup, shutdown, and variable-well operating conditions. Arsenic performance is the highest-weighted technical criterion and will control acceptance of treated water.

3.2 Supporting Objectives

Protect public health and maintain a consistent compliance with applicable drinking-water requirements and the contractual arsenic performance standards.

Use proven municipal treatment technology with demonstrated full-scale performance.

Provide reliable service at 5 MGD in winter and 12 MGD in summer, with consistent treatment performance throughout the required operating range.

Place all routine operation, maintenance, media replacement, chemical supply, electrical power, and waste-management responsibility on the Contractor.

Minimize treatment chemicals, reject water, backwash water, and arsenic-bearing residuals without compromising treatment performance or overall water quality.

Integrate with the City's GE iFIX SCADA environment without transferring operation of the treatment system to City staff.

Maintain compatibility with downstream chlorine and free-ammonia addition and avoid creating additional downstream chemical demand, treatment, monitoring, or regulatory compliance burdens.

Preserve overall water quality by avoiding material adverse changes in pH, alkalinity, TDS, salinity, hardness, chloride, sulfate, sodium, iron, manganese, turbidity, regulated constituents, residual treatment chemicals, and treatment byproducts, except for changes disclosed, demonstrated to be safe and compliant, and specifically approved by the City.

Provide transparent, auditable pricing expressed primarily as dollars per 1,000 gallons of accepted treated water.

Avoid dependence on experimental or proprietary performance claims that are not supported by comparable full-scale municipal installations.

3.3 Informational Water-Quality Benefits

The proposal may describe incidental removal of iron, manganese, fluoride, turbidity, or other constituents. Those benefits are informational and will not replace or dilute the required focus on arsenic. Additional constituent removal will receive evaluation consideration only to the extent it materially improves arsenic reliability, reduces waste or chemical demand, or lowers risk and lifecycle cost.

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4. Minimum Qualifications and Mandatory Requirements

The following requirements are pass/fail. Failure to satisfy or clearly accept a mandatory requirement may result in rejection before weighted scoring.

No. Mandatory Requirement

1 Attendance at the mandatory pre-proposal conference and site visit.

2 Acceptance of the full-service model: Contractor designs, furnishes, installs, owns, operates, maintains, and manages residuals for the treatment system (throughout the service term, subject to the end-of-term transition and disposition provisions of this RFP and the final Agreement)

3 Guaranteed treatment capacity of 5 MGD winter flow and 12 MGD summer flow, with stable operation at intermediate flows and compliance with all required treatment performance standards throughout the stated flow range..

4 Contractual arsenic guarantee meeting Section 6.2.

5 Complete responsibility for spent media, sludge, brine, backwash, reject water, and all other byproducts, including characterization, transportation, and lawful disposition.

6 Provision and payment of required electrical power delivery infrastructure and energy, unless the final pricing form expressly states a City-paid pass-through approved by the City.

7 Integration with GE iFIX through a City-approved interface, while maintaining Contractor operational responsibility.

8 Minimum of three successfully operating municipal or public-water arsenic treatment installations; at least one shall treat 5 MGD or more, or the proposer shall demonstrate equivalent parallel full-scale experience.

9 At least three years of operating history for the proposed core treatment technology at comparable water quality, unless the City expressly approves an alternative demonstration basis.

10 Agreement to the ten-year initial term and ability to support two five-year extensions.

11 Texas-licensed professional engineering responsibility for final design and sealed submittals.

12 Disclosure of all treatment chemicals, media, waste streams, proprietary limitations, subcontractors, and exceptions.( Disclosure of all treatment chemicals, media, waste streams, raw-water assumptions and limitations, proprietary limitations, subcontractors, exceptions, and required City support.)

4.1 Prohibited or Disfavored Approaches

Laboratory-only, unproven, or pilot-only technologies without adequate full-scale municipal operating history are disfavored.

A process that transfers routine operation, media handling, waste disposal, maintenance or responsibilities assigned to the Contractor under this RFP to the City is nonresponsive unless specifically authorized by the City as an alternate.

A base proposal dependent primarily on reverse osmosis or nanofiltration should be submitted only if the proposer demonstrates compelling arsenic-specific value, high water recovery, complete reject management, and competitive unit cost.

A proposal relying on undisclosed proprietary chemistry, undisclosed consumables, or unsupported contaminant-removal claims, or undisclosed process limitations may be rejected.

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5. Scope of Services

5.1 General Turnkey Responsibility

The Contractor shall provide a complete turnkey treatment and shall furnish every item reasonably necessary to receive raw groundwater, treat it for arsenic, consistently meet the applicable contractual performance and treated water quality requirements, deliver the accepted treated water to the City at the designated connection, and manage all resulting residuals. The scope includes items not expressly listed when they are necessary for a safe, permitted, compliant, reliable, and complete system.

5.2 Site Investigation and Basis of Design

Review Exhibit A and all available historical water-quality data.

Conduct confirmatory sampling, including arsenic speciation when needed to support the proposed process and performance guarantee, accounting for reasonably expected well combinations and source-water variability.

Evaluate pH, alkalinity, silica, phosphate, vanadium, iron, manganese, sulfate, TDS, hardness, and other constituents that could affect arsenic treatment or media life.

Perform survey, utility locating, geotechnical investigation, hydraulic verification, electrical-load evaluation, and constructability review as required to verify existing conditions and support final design and installation.

Submit a sealed basis-of-design report documenting raw-water assumptions, process selection, design loading, vessel sizing, media capacity, chemical demand, waste production, head loss, recovery, redundancy, and expected media replacement frequency.

5.3 Engineering and Permitting

Prepare design calculations, process flow diagrams, P&IDs, site plans, civil, structural, mechanical, electrical, instrumentation, controls, and communications drawings.

Prepare sealed plans, specifications, engineering reports, and supporting materials required for TCEQ plan review and other approvals.

Respond to agency comments and revise documents until approvals are obtained.

Obtain contractor-controlled permits, registrations, utility agreements, and authorizations; support City signatures where owner execution is legally required.

Coordinate all work with City staff, the electric utility, landowners or easement interests, and other affected parties.

5.4 Treatment Equipment and Facilities

Pretreatment, oxidation, pH adjustment, adsorption, filtration, ion exchange, or related process equipment necessary for the guaranteed arsenic performance.

Treatment vessels, media, underdrains, piping, valves, pumps, compressors, tanks, chemical feed systems, containment, buildings or enclosures, HVAC, lighting, and safety equipment.

Influent, intermediate, and effluent sample points located to support media-breakthrough monitoring and process troubleshooting.

Isolation, bypass, drainage, flushing, backwash, residual collection, and emergency shutdown facilities.

Redundant or parallel treatment trains adequate to maintain required flow and compliance with all required treatment performance standards during routine media changeout and planned maintenance.

Flow measurement and billing-quality metering at the accepted treated-water delivery point.

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5.5 Civil, Structural, and Site Work

Clearing, grading, drainage, foundations, equipment pads, access roads, fencing, gates, bollards, security, and erosion control.

Temporary construction facilities, laydown areas, restoration, and protection of existing operations.

All raw-water and treated-water tie-ins required for the approved treatment location and hydraulic arrangement,, including valves, fittings, thrust restraint, temporary bypasses, and shutdown coordination.

Freeze protection, weather protection, wind design, flood considerations, and remote-site durability appropriate for West Texas conditions.

5.6 Electrical Power Delivery

The Contractor is responsible for obtaining and delivering all electrical power necessary for the treatment service.

This includes utility coordination, load studies, service extensions, transformers, metering, switchgear, motor-control equipment, distribution, grounding, lightning protection, standby-power strategy, arc-flash studies, testing, and ongoing energy cost unless the City approves a different commercial arrangement in writing.

Existing electrical drawings are provided only as reference. The Contractor shall not assume spare capacity or permission to connect to existing equipment. Any use of existing infrastructure requires written City approval and field verification.

5.7 Controls, Instrumentation, and GE iFIX Integration

Provide a complete Contractor-operated PLC and control system with local HMI, alarms, data historian, and secure remote monitoring.

Provide a City-approved interface to the City's GE iFIX SCADA system using protocols and architecture approved by the City.

At a minimum, transmit flow, cumulative volume, treatment-train status, tank or vessel status, differential pressure, chemical or media alarms, power status, water-quality data, shutdown status, and critical alarms.

Provide the City read-only visibility and emergency stop or isolation capability as approved; routine control remains the Contractor's responsibility.

Comply with City cybersecurity requirements, including approved remote access, multifactor authentication, account management, logging, backups, and prohibition of uncontrolled internet-facing equipment.

5.8 Startup, Commissioning, and Acceptance

Factory testing and submittal review before shipment.

Installation inspection, pressure testing, disinfection where required, instrument calibration, controls testing, and startup by qualified personnel.

Initial Performance Test at approximately 5 MGD.

Full Capacity Performance Test at 12 MGD during the first available summer operating period.

Correction of deficiencies at Contractor expense and resubmission of test results.

5.9 Operations and Maintenance

Provide all licensed operators and support personnel required for continuous service.

Operate, inspect, maintain, repair, calibrate, clean, replace media, replenish chemicals, and manage spares.

Maintain preventive and predictive maintenance programs and a computerized maintenance record.

Provide 24-hour alarm monitoring and emergency response.

Coordinate planned outages with the City and maintain treatment during routine service through redundancy or approved temporary systems.

5.10 Sampling, Laboratory Services, and Reporting

Provide all contract-performance sampling and analytical costs.

Use accredited or otherwise City-approved laboratories and approved methods for arsenic analysis.

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Provide expedited turnaround when action levels are approached or exceeded.

Submit monthly operating reports, annual performance reports, waste manifests, chemical-use records, energy use, recovery, downtime, and unit-cost data.

Immediately report any condition that could result in off-spec water or affect downstream disinfection.

5.11 Demobilization or Transfer at End of Term

The proposal shall describe the disposition of the treatment facility at the end of the initial term and each extension. The City may require removal and full site restoration, continued service during transition, or negotiation of a purchase or transfer option. The proposer shall provide optional buyout values at the end of years 10, 15, and 20. No transfer is required unless accepted by the City in writing.

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6. Technical and Performance Requirements

6.1 Design and Operating Capacity

Requirement Minimum Standard

Winter capacity 5.0 MGD continuous

Summer capacity 12.0 MGD continuous

Turndown Stable operation throughout 5.0 to 12.0 MGD; proposer shall state lower stable flow if available

Hydraulic impact Contractor shall provide all pumping or hydraulic improvements needed to avoid reducing the City's deliverable flow

Redundancy Parallel or lead-lag configuration allowing routine media changeout and maintenance without loss of required service

Availability Minimum 99.0 percent monthly availability at the City-requested flow, excluding documented City-caused outages and force majeure

6.2 Arsenic Performance Guarantee

PRIMARY CONTRACT PERFORMANCE STANDARD

The proposed system shall be designed for a treated-water arsenic target of 0.005 mg/L or lower and shall contractually guarantee accepted treated water at or below 0.008 mg/L. Water with arsenic at or above 0.010 mg/L shall not be delivered as accepted treated water. The proposer may offer a more stringent guaranteed concentration, which will be considered under the arsenic-performance criterion.

Level Arsenic Concentration Required Response

Design target ≤ 0.005 mg/L Normal design and expected performance; proposer shall state expected concentration and margin.

Action level > 0.007 mg/L Immediate notification, accelerated sampling, media or process evaluation, and corrective action.

Contract maximum for accepted water

≤ 0.008 mg/L Water above this level is off-spec for payment and triggers corrective-action requirements.

Regulatory ceiling / automatic isolation threshold

≥ 0.010 mg/L Stop, isolate, divert, or otherwise prevent delivery as accepted treated water until restored and verified.

The City may adjust action and acceptance thresholds during final contract negotiations based on TCEQ review, final process design, blending conditions, and source-water data. Any adjustment will preserve a meaningful operating margin below the applicable arsenic MCL.

6.3 Raw-Water Variability and Arsenic Speciation

The Contractor shall account for arsenic species and competitive water-quality effects. The Contractor is responsible for determining whether preoxidation or other conditioning is required to convert arsenite to a more treatable form. The process shall remain effective under reasonably expected combinations of wells and flow conditions represented by Exhibit A and proposer-confirmed testing.

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The proposal shall state influent arsenic assumptions, media loading assumptions, empty-bed contact time, breakthrough criteria, mass-transfer-zone strategy, regeneration or replacement frequency, and any raw-water constituent limits. Any limitation must include a proposed monitoring and response plan.

6.4 Acceptable Treatment Approaches

The City is not specifying a manufacturer. The base proposal should use a commercially proven, arsenic-focused treatment process. Acceptable approaches may include:

Iron-based adsorptive media, including granular ferric oxide, granular ferric hydroxide, or comparable media.

Activated alumina or other demonstrated arsenic-selective adsorption media.

Coagulation and filtration or iron-enhanced removal processes.

Oxidation and filtration, catalytic media, manganese greensand, or GreensandPlus where supported by source-water chemistry and full-scale performance.

Ion exchange where competing ions, regeneration, brine management, and arsenic speciation are fully addressed.

Hybrid systems combining proven unit processes.

Other proven municipal technologies meeting all mandatory requirements.

6.5 Process Reliability and Breakthrough Protection

Lead-lag or equivalent vessel arrangement with intermediate sample points.

Defined media-breakthrough criteria well below the contract maximum.

Sufficient media inventory and changeout planning to prevent loss of service.

Automatic or operator-initiated isolation of an off-spec train.

Alarm setpoints, response procedures, and decision logic documented in the operating plan.

Spare critical equipment and consumables appropriate to the remote location and seasonal demand.

6.6 Water Recovery, Chemical Efficiency, and Energy

The proposal shall identify all water losses, backwash, reject, brine, drainage, and residual volumes. Preference will be given to systems with high net water recovery, low chemical use, and beneficial reuse or lawful recycling of process water. These factors will be evaluated separately but may not compromise arsenic performance or overall treated-water quality.

The process shall minimize chemical addition and shall not cause a material adverse increase in dissolved or total constituents or in downstream chemical demand. At both 5 MGD and 12 MGD, the proposer shall quantify influent, expected effluent, and maximum effluent values for pH, alkalinity, TDS, hardness, chloride, sulfate, sodium, iron, manganese, turbidity, each treatment chemical and residual, and any other constituent or byproduct reasonably expected to change. Changes outside normal source-water variability shall be specifically identified and demonstrated to satisfy Sections 6.7 and 12.

Required Disclosure Unit

Net treated-water recovery at 5 MGD and 12 MGD percent

Backwash / reject / waste water gallons per 1,000 gallons treated and annual gallons

Each chemical and average / maximum dose mg/L and pounds per million gallons

Expected media use and replacement interval pounds or cubic feet per year; months between changeouts

Electrical energy kWh per 1,000 gallons treated

Residual solids / spent media tons or cubic yards per year

Treated-water pH and alkalinity Influent, expected effluent, and maximum effluent; pH units and mg/L as CaCO3

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Required Disclosure Unit

TDS and major ions Influent, expected effluent, and maximum effluent in mg/L

Other constituent changes, residual chemicals, and byproducts Influent, expected effluent, and maximum effluent in applicable units

6.7 Compatibility with Downstream Chloramination

The Contractor shall not assume that disinfection occurs at the wellfield. An oxidant may be proposed to convert arsenite to the more readily removable arsenate form or to support another demonstrated treatment mechanism;

it shall not be represented solely as a corrosion-control measure. The proposal shall identify the oxidant, purpose, normal and maximum dose, feed-control method, quenching or removal method if applicable, and expected and maximum residual oxidant at the treated-water delivery point.

The proposer shall demonstrate compatibility with downstream chlorine and free-ammonia addition and shall evaluate pH, alkalinity, TDS, major ions, oxidant demand, corrosion or scaling potential, chloramine formation, disinfection byproducts, chlorite, bromate, permanganate carryover, taste and odor, and other treatment byproducts. The process shall not adversely affect downstream tanks, piping, pumps, valves, meters, analyzers, coatings, elastomers, electrical or instrumentation equipment, or future treatment processes. Any additional downstream chemical feed, monitoring, maintenance, equipment modification, or regulatory requirement shall be clearly disclosed and included in the proposed price.

6.8 Materials and Chemical Requirements

Materials in contact with drinking water shall meet applicable NSF/ANSI requirements unless the City and TCEQ approve otherwise.

Chemicals shall be suitable for potable-water treatment and furnished with current safety data sheets and certifications.

No process chemical, media aid, or proprietary additive may be used without prior disclosure and City approval.

All chemical storage and feed systems shall include secondary containment, leak detection, ventilation, eyewash/shower facilities, and safe delivery provisions as applicable.

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7. Performance Verification and Acceptance

7.1 Design Validation

The City may require one or more shortlisted proposers to conduct bench-scale, rapid-column, or pilot validation using representative T-Bar water before final selection or as a condition of contract execution. Each proposal shall include a validation protocol, schedule, sample volume requirements, performance criteria, and not-to-exceed cost. The City may waive testing for a proposal supported by highly comparable full-scale operating data.

7.2 Initial Performance Test - 5 MGD

After startup, the Contractor shall complete an Initial Performance Test at approximately 5 MGD. Unless modified in the approved test plan, the test shall include at least thirty consecutive days of operation, compliance with the arsenic guarantee, demonstration of all treatment trains and controls, flow and meter verification, alarm testing, waste handling, and availability of at least 99 percent.

7.3 Full Capacity Performance Test - 12 MGD

During the first available summer operating period, the Contractor shall demonstrate thirty consecutive days of operation at 12 MGD, subject to source availability. The test shall verify arsenic performance, hydraulic capacity, power delivery, waste handling, media loading, redundancy, and SCADA integration. Failure to complete the full-capacity test will constitute a material deficiency unless caused solely by the City's inability to supply the required raw-water flow.

7.4 Performance Sampling Schedule

Period Minimum Arsenic Sampling

Startup and first 14 days Daily influent, intermediate, and treated-water samples; expedited results.

Remainder of Initial Performance Test

At least three times per week at influent and treated-water points; intermediate samples as needed.

First 90 days after acceptance At least weekly treated-water samples and monthly certified-laboratory confirmation;

more frequent at City request if results trend upward.

Normal operation At least weekly contract-performance monitoring and monthly certified-laboratory arsenic analysis, plus all regulatory monitoring.

Action-level condition Immediate resample and expedited confirmatory analysis; frequency increased until three consecutive acceptable results.

The final monitoring plan will be coordinated with the City's regulatory monitoring plan. Contract samples do not replace compliance samples unless approved by the City and TCEQ.

7.5 Off-Spec Water and Remedies

Gallons determined to be off-spec under Section 6.2 are not billable as accepted treated water.

The Contractor shall immediately notify the City, isolate the affected train, investigate the cause, and implement corrective action.

The Contractor shall bear the cost of additional sampling, media replacement, temporary treatment, residual handling, and other corrective measures attributable to Contractor performance.

To the extent caused by the Contractor's failure to meet the contract requirements, negligent act or omission, process upset, chemical or oxidant carryover, or violation of law, the Contractor shall also be responsible for the City's documented direct costs of regulatory response and reporting; TCEQ or other agency investigations, enforcement actions, administrative penalties, or fines to the extent recoverable by law; public notification; replacement water; emergency treatment; and system isolation, bypass, shutdown, restart, T-Bar Wellfield | September 23, 2026 | Page 19 flushing, disinfection, and return to service. The final agreement will establish procedures, limitations, and remedies without limiting the City's other contractual or legal rights.

Repeated or prolonged failure may result in service credits, recovery of documented replacement-water costs, liquidated damages if included in the final contract, suspension, or termination.

The City's acceptance of water or payment does not waive the performance guarantee.

7.6 Data Validation and Audit Rights

The City may collect independent samples, audit meters, review laboratory reports, inspect treatment and waste records, and require calibration checks. In the event of a data conflict, the City may require split samples at an agreed laboratory. The Contractor shall preserve all operating and analytical records for at least ten years or longer if required by law or the contract.

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8. Operations, Maintenance, and Staffing

8.1 Contractor-Operated Facility

This solicitation is for full-service operation. City personnel will not be responsible for routine operation, chemical handling, media replacement, waste handling, calibration, or maintenance. The City retains oversight, inspection, sampling, emergency-isolation, and contract-administration rights.

8.2 Staffing and Licensing

Provide appropriately licensed Texas public-water-system operators and qualified maintenance technicians.

Identify the responsible operator, backup operator, project manager, process engineer, controls specialist, and residuals coordinator.

Maintain sufficient staffing and on-call coverage to meet all response requirements.

Provide background checks, safety training, site orientation, and compliance with City access requirements.

8.3 Response Times

Event Required Response

Critical alarm Acknowledge within 15 minutes; begin remote response within 30 minutes.

Potential off-spec condition Immediate City notification and isolation or operational response.

Critical on-site response Qualified personnel on site within four hours unless a shorter time is proposed.

Noncritical maintenance Response within one business day or approved maintenance schedule.

Waste or chemical spill Immediate containment and notification in accordance with the emergency plan and applicable law.

8.4 Maintenance Program

Manufacturer-recommended preventive maintenance supplemented by condition-based maintenance.

Annual calibration of billing meters and water-quality instruments, or more frequently when recommended.

Inventory of critical spare parts and replacement media sufficient to avoid extended outage.

Planned media replacement based on lead-vessel breakthrough and conservative remaining-capacity estimates.

Maintenance records available to the City through…