A04_NATC_SOW_Backflow_Preventer_Replacement.pdf

STATEMENT OF WORK

Project: Replace Backflow Preventers – Boiler/Chiller System

Location: 640 South Canal Street, Natchez, Mississippi

Contract Type: Firm Fixed Price (FFP) – Service Contract

Prepared By: Daryl Beck

Date: December 1, 2025

Period of Performance: 60 Calendar Days

Attachment A: Reference Photos and Field Measurements

SECTION 1 — GENERAL REQUIREMENTS

1.1 Description of Work

The Contractor shall provide all labor, supervision, materials, equipment, tools, transportation, permits, and disposal necessary to remove two (2) existing reduced pressure zone (RPZ) backflow preventers serving the boiler and chiller systems at the Natchez Visitor Center, and replace them with new, code-compliant commercial-grade RPZ units. Work includes disconnection and removal, procurement of new units, installation and reconnection, pressure testing and certification, restoration of disturbed insulation or finishes, and delivery of final documentation.

1.2 Contractor Responsibilities

• Deliver a complete, functional, code-compliant installation.

• Protect surrounding equipment and finishes during work.

• Coordinate with the Government for system shutdowns and access.

• Provide certified technicians for installation and testing.

• Ensure daily cleanup and lawful disposal of removed materials.

• All plumbing work shall be performed by a Mississippi-licensed plumber in accordance with applicable codes.

• Backflow testing shall be performed by a certified/licensed backflow tester, recognized by the local authority (City of Natchez or Mississippi Department of Health).

• The Contractor shall ensure that all new RPZ devices are rated for a minimum of 140 degrees Fahrenheit and 175 PSI, or higher as required to match the existing system's operating conditions. It is the Contractor’s responsibility to confirm compatibility with the system’s actual pressure and temperature during field verification. Devices not meeting or exceeding these ratings shall not be accepted.

1.3 Submittals

• Product cut sheets for RPZ units

• Shop drawings, if applicable

• Backflow test and certification documentation

• As-built notes and warranty certificates

• All submittals shall be reviewed and approved by the COR prior to procurement or installation.

1.4 Schedule & Work Hours

All work shall be completed within 60 calendar days from Notice to Proceed. Work hours are

Monday–Friday, 07:00–15:30 Central Time, excluding federal holidays, unless otherwise approved by the COR.

1.5 Site Access, Protection & Temporary Facilities

• Coordinate access and shutdowns with the Facility Manager.

• Provide temporary barriers, coverings, and safety signage as needed.

• Maintain egress and protect equipment from dust or damage.

• Store materials safely and keep pathways clear.

• The Government will ensure access clearance to equipment and piping is available prior to work start.

1.6 Safety & Environmental

The Contractor is responsible for always maintaining a safe and compliant worksite. All work shall be performed in accordance with:

• OSHA 29 CFR 1926 – Construction Industry Safety Standards

• All applicable Federal, State, and local safety and environmental regulations

• Any site-specific safety protocols directed by the COR

The Contractor shall provide and maintain a basic Site Safety Plan, conduct daily housekeeping, and ensure all personnel are properly trained and equipped. SDS sheets for any chemicals or hazardous materials used shall be available on site.

1.7 Codes & Standards

• ASSE 1013 and/or USC FCCC&HR-certified RPZ devices

• 2021 International Plumbing Code (IPC), as adopted by the City of Natchez and Adams

County, Mississippi

• Mississippi Building Code and any local amendments

• OSHA 29 CFR 1926

• NFPA standards where applicable

• Manufacturer installation instructions

1.8 Quality Assurance / Quality Control

• Perform QA/QC inspections throughout the installation.

• Pressure test and certify RPZ devices with licensed backflow tester.

• Tag each unit with permanent inspection/certification label.

• Restore insulation and wall/floor penetrations to match existing.

1.9 Coordination

• Conduct pre-construction walkthrough with COR.

• Notify Government at least 72 hours before any required outages.

• Submit schedule and sequence of operations before starting work.

1.10 Government-Furnished Services

The Government will provide access to utilities, facility escort (if required), and assistance with mechanical system shutoffs.

1.11 Permits & Inspections

The Contractor is responsible for obtaining and scheduling any required permits and inspections.

Submit all certification test results as part of project closeout.

1.12 Closeout

• Final cleaning of work area

• Delivery of test results, warranty documents, as-builts, and O&M

• Final inspection and acceptance by COR

• Minimum 1-year warranty on workmanship and materials, or longer as provided by manufacturer

1.13 Site Verification and Due Diligence

A pre-bid site visit is strongly recommended. The Contractor shall be responsible for verifying all field conditions prior to proposal, including: pipe sizes, materials, valve configuration, clearances, and existing code compliance.

Failure to perform a site visit shall not relieve the Contractor of responsibility for delivering a complete, operable, and code-compliant installation. No additional compensation will be granted for conditions reasonably discoverable prior to proposal.

SECTION 2 — DETAILED TECHNICAL SCOPE OF

WORK

• Remove and dispose of two (2) existing RPZ backflow preventers.

• Furnish and install two (2) new commercial-grade RPZ units (3"–4"), compliant with

ASSE 1013 or USC FCCC&HR standards, and complete with new inlet and outlet isolation valves and relief vent/discharge assemblies.

• Provide all required fittings, valves, hangers, supports, and insulation necessary for a complete and code-compliant installation.

• Reconnect, pressure test, and tag each device.

• Submit certification paperwork, photos, and as-builts.

• Flush or bleed piping as necessary to ensure full operability.

• Leave system in complete, functional condition upon completion.

SECTION 3 — DIVISIONAL REQUIREMENTS

Division 22 — Plumbing

• RPZ Devices: Bronze/stainless, USC/ASSE certified, including new test cocks, inlet and outlet isolation valves, and relief vent/discharge assemblies

• Valves: Full-port bronze or stainless-steel ball or gate valves, NSF 61 certified, sized to match existing piping

• Piping: Type L copper or Schedule 40 steel (galvanized not acceptable unless pre-approved)

• Fittings & Unions: Compatible with existing system and suitable for service temperature and pressure

• Insulation: Replace with foil-faced fiberglass or equivalent

• Testing: Performed by certified backflow technician; include pressure and function test

Division 01 — General Conditions

• Mobilization, protection, and cleanup included in price

• Submittals and documentation required

• Coordination with COR and Facility Manager required

SECTION 4 — EXECUTION & CLOSEOUT

4.1 Execution

• Contractor shall verify field conditions before ordering equipment

• Sequence work to minimize system downtime

• Maintain safe and clean work area throughout project

4.2 Cleaning & Final Acceptance

• Clean all surfaces; remove debris and protection

• Submit all deliverables for COR approval

• Final walkthrough with COR required before acceptance

4.3 Deliverables

• Backflow test and certification reports

• Warranty documents

• As-built installation notes/photos

• Equipment cut sheets and O&M data

4.4 Warranty

• 1-year minimum on all labor and materials

• Manufacturer warranties shall transfer to the Government

SECTION 5 — SPECIAL CONDITIONS AND RISK

MITIGATIONS

5.1 Site Condition Verification

The Contractor shall verify all field conditions — including pipe size, valve function, access clearance, and code compliance — prior to ordering equipment. Any issues must be reported in writing before mobilization. No compensation will be granted for issues reasonably discoverable before work begins.

5.2 Code Compliance Responsibility

The Contractor is responsible for ensuring the final installation complies with all applicable codes, including those enforced by the City of Natchez and the State of Mississippi. Any required system upgrades that are reasonably discoverable shall be included in the base price.

If hazardous materials or unsafe conditions are encountered, the Contractor shall stop work and notify the COR immediately.

5.3 All-Inclusive Pricing

The firm fixed price shall cover all labor, materials, supervision, equipment, testing, and incidental work required to deliver a complete, functional, and code-compliant system. No additional funds will be authorized for foreseeable or field-verifiable conditions.

5.4 Change Order Limitations

Change requests will only be considered for truly unforeseeable conditions.

Failure to conduct a site visit or field verification does not constitute grounds for a change order.

Appendix A

Appendix B

END OF STATEMENT OF WORK