Building 168 Chilled Water Chemical Injector RFP.pdf

REQUEST FOR PROPOSAL (RFP)

PROJECT TITLE: Building 168 Chilled Water Chemical Feed System Replacement (SPBN-262009) LOCATION: Building 168, Otis Air National Guard Base (ANGB), Bourne, MA (Barnstable County) ISSUING AGENCY: Civil Engineer Squadron (CES), 102nd Intelligence Wing, Otis ANGB

1.0 PROJECT DESCRIPTION & OBJECTIVES

The Civil Engineer Squadron (CES) at the 102nd Intelligence Wing, Otis ANGB, is requesting proposals from qualified mechanical and environmental contracting firms to perform a complete replacement of the chilled water chemical feed and injection system serving Building 168.

Building 168 utilizes a closed-loop chilled water system as its primary HVAC dispersion mechanism. The legacy chemical injection panel is non-functional, leading to a risk of biological fouling, corrosion, and scale buildup. The selected Contractor shall be responsible for providing all labor, materials, equipment, transportation, and safety protocols necessary to perform comprehensive water testing, flush and clean the chilled water loop, decommission and remove the legacy injector, and install a brand-new, fully automated chemical feed skid.

2.0 CODES, STANDARDS, AND REGULATORY COMPLIANCE

All work, equipment selection, piping, and electrical integration performed under this contract shall comply with the most current editions of the following federal, military, and industry standards:

2.1 Department of Defense (DoD) Standards

• UFGS 23 25 00 (Water Treatment for Mechanical Systems): Governs materials, equipment, testing, and operational chemistry requirements for closed-loop HVAC water treatment.

URL: https://www.wbdg.org/ffc/dod/unified-facilities-guide-specifications-ufgs/ufgs-23- 25-00

• UFC 3-410-01 (Heating, Ventilating, and Air Conditioning Systems): Mandates design, maintenance, and energy efficiency parameters for military facility HVAC systems.

URL: https://www.wbdg.org/ffc/dod/unified-facilities-criteria-ufc/ufc-3-410-01

2.2 National and Professional Standards

https://www.wbdg.org/ffc/dod/unified-facilities-guide-specifications-ufgs/ufgs-23-25-00 https://www.wbdg.org/ffc/dod/unified-facilities-guide-specifications-ufgs/ufgs-23-25-00 https://www.wbdg.org/ffc/dod/unified-facilities-criteria-ufc/ufc-3-410-01

• ASHRAE Guideline 12-2023 (Managing the Risk of Legionellosis Associated with Building Water Systems): Outlines essential risk management and chemical treatment benchmarks for biological growth controls.

URL: https://www.ashrae.org/technical-resources/standards-and-guidelines/guideline- 12-2023

• ANSI/ASHRAE Standard 180-2018 (Standard Practice for Inspection and Maintenance of Commercial Building HVAC Systems): Defines mandatory cleaning, servicing, and testing intervals.

URL: https://www.ashrae.org/technical-resources/standards-and-guidelines/standard- 180-2018

• ASME BPVC Section VIII-2023 (Boiler and Pressure Vessel Code): Governs design, manufacturing, and safety standards for any pressurized bypass feeders or chemical vessels integrated into the loop.

URL: https://www.asme.org/codes-standards/publications-manuals/bpvc-2023-edition

• Occupational Safety and Health Administration (OSHA):

o 29 CFR 1910.147 (Control of Hazardous Energy - Lockout/Tagout) o 29 CFR 1910.1200 (Hazard Communication/Safety Data Sheets)

3.0 SCOPE OF WORK (SOW)

The Contractor shall execute the project in four sequential phases. All labor categories utilized must align with the Davis-Bacon Act requirements for Barnstable County, MA.

Phase 1: Water Quality Testing, Flushing & Baseline Analysis

1. Baseline Testing: Before system disruption, the Contractor shall extract water samples from the Building 168 chilled water loop and coordinate a comprehensive panel through an accredited, third-party laboratory. The analysis must test for:

o Total Dissolved Solids (TDS) and Conductivity.

o pH levels and Total Alkalinity.

o Iron, Copper, and Silica concentrations.

o Biological activity, including sulfate-reducing bacteria and aerobic heterotrophic plate counts.

https://www.ashrae.org/technical-resources/standards-and-guidelines/guideline-12-2023 https://www.ashrae.org/technical-resources/standards-and-guidelines/guideline-12-2023 https://www.ashrae.org/technical-resources/standards-and-guidelines/standard-180-2018 https://www.ashrae.org/technical-resources/standards-and-guidelines/standard-180-2018 https://www.asme.org/codes-standards/publications-manuals/bpvc-2023-edition

2. System Flushing and Cleaning: Under the guidance of UFGS 23 25 00, the Contractor shall isolate, drain, and flush the closed loop using approved descaling acids and neutralizers to remove loose scale, rust, and biological film.

3. Chemical Disposal: The Contractor is responsible for the collection and safe transport of all flushing effluent. No chemical waste shall be discharged into the base sanitary sewer or storm drain system. The Contractor must dispose of all industrial fluids off-base at an EPA-approved facility.

Phase 2: Demolition of Legacy Equipment

1. Decommissioning: The Contractor shall perform Lockout/Tagout (LOTO) on all electrical power sources and fluid bypass lines connected to the legacy injection station.

2. Removal: Safely disconnect, unmount, and remove the non-functional chemical injection board, legacy bypass feeder, and associated inactive piping. All materials must be disposed of off-base in accordance with local and state environmental laws.

Phase 3: Procurement & Installation of New Chemical Feed System

1. Automated Chemical Feed Skid: The Contractor shall furnish and install a complete, pre-packaged, multi-pump automatic injection panel. The skid must include:

o A digital microprocessor controller capable of proportional-to-flow or timer-based chemical dosing.

o Integrated safety flow-switch interlocks to prevent chemical injection during low or zero-flow states.

o Low-level chemical drum sensors with audible and visual alarms.

2. Probes and Sensors: Install high-accuracy inline insertion probes for continuous monitoring of pH, conductivity, and temperature.

3. Piping and Valving: Install all necessary bypass valves, isolation valves, and inline check valves using Schedule 80 PVC piping, ensuring compliance with ASME BPVC Section VIII- 2023 limits.

4. Secondary Spill Containment: Mount the chemical drums and the entire feed system within a secondary safety containment basin with a minimum capacity of 110% of the total stored chemical volume.

Phase 4: Commissioning, Closeout, and Wing Training

1. Electrical & Control Integration: Wire low-voltage controls and calibrate all digital sensors back to the main HVAC automation panel.

2. Loop Optimization: Inject baseline chemical inhibitors (corrosion and scale inhibitors, plus a biocide protocol matching laboratory recommendations) to bring water parameters within UFGS 23 25 00 operating limits.

3. Handover and Training: Provide the Civil Engineer Squadron with three (3) physical and digital copies of the Operations & Maintenance (O&M) manuals, laboratory water test reports, and chemical SDS sheets. Provide a minimum of four (4) hours of hands-on training for base CE personnel on system calibration, drum replacement, and safety protocols.

4.0 CONTRACTOR BASE ACCESS AND SECURITY REQUIREMENTS

Because Building 168 is located within a restricted military installation (Otis ANGB), the Contractor shall strictly comply with all security forces procedures:

1. Vetting & Badging: All personnel must be U.S. citizens and submit to a National Crime Information Center (NCIC) background check at least ten (10) business days prior to scheduled field operations.

2. Identification: Personnel must possess a valid, REAL ID-compliant driver's license or passport to receive an installation visitor pass.

3. Vehicle Access: All commercial vehicles, delivery trucks, and equipment trailers must enter through the designated commercial vehicle gate for physical inspections. All vehicles must have current registration, proof of insurance, and clear corporate markings.

4. Escort Requirements: Un-vetted personnel or delivery drivers will not be permitted unescorted access to Building 168. Any delays resulting from security processing are the sole responsibility of the Contractor.

5.0 SAFETY AND ENVIRONMENTAL PROTECTION

The Contractor shall maintain a clean, organized, and safe work site:

1. Personal Protective Equipment (PPE): During chemical handling, testing, and flushing, workers must wear appropriate splash goggles, chemical-resistant aprons, and nitrile gloves.

2. Lockout/Tagout (LOTO): The Contractor shall strictly coordinate electrical and valve lockouts with the Building 168 facility manager and Otis CES prior to work.

3. Safety Data Sheets (SDSs): Digital copies of SDS sheets for all cleaning chemicals, acids, neutralizers, and water treatment inhibitors must be submitted to and approved by the Otis ANGB Bioenvironmental and Environmental Office before bringing chemical stock onto the installation.

4. Spill Kit: A chemical spill containment kit, rated for the volumes on-site, must be kept adjacent to the work area at all times during Phase 1 and Phase 3.

6.0 PROPOSAL SUBMISSION REQUIREMENTS

The Contractor's proposal must be submitted in two separate volumes:

6.1 Volume I: Technical Proposal

1. Executive Summary: Brief description of the firm's understanding of the Building 168 chilled water replacement scope.

2. Key Personnel: Resumes of the Lead Mechanical Pipefitter, Electrician, and Project Manager.

3. Equipment Cut Sheets: Technical data and specifications for the proposed automated chemical feed skid, digital controller, probes, and secondary containment unit.

4. Past Performance: Documentation of at least three (3) projects of similar scope and complexity completed within the past five (5) years, preferably on DoD or federal installations.

6.2 Volume II: Price Proposal

The Price Proposal must be itemized to align with the core phases of the Independent Government Cost Estimate (IGCE). Pricing must be fully loaded, detailing:

• Direct Labor costs (fully burdened, complying with Davis-Bacon rates).

• Direct Material and Equipment costs.

• Percentage and dollar values applied for Contractor Overhead, Profit, and Bond.

7.0 EVALUATION CRITERIA

The Government intends to award a firm-fixed-price contract to the responsible bidder whose proposal represents the Lowest Price Technically Acceptable (LPTA) value. Proposals will be evaluated on:

1. Technical Acceptability: Adherence to SOW requirements, equipment criteria in Section 3.0, and strict compliance with the codes/standards cited in Section 2.0.

2. Past Performance: Demonstrated history of successful mechanical installation and water-treatment execution.

3. Price: The total evaluated price (comprising all direct and indirect markups). Proposals exceeding the established Independent Government Cost Estimate (IGCE) baseline may be subject to additional scrutiny or negotiation.

8.0 POINT OF CONTACT

For technical questions, please contact:

Nathanael Costa – Civil Engineer, GS-12 Civil Engineer Squadron, 102nd Intelligence Wing Otis ANGB, MA Email: Nathanael.Costa@us.af.mil Phone: 508-968-4723