27th Chase Wetwell HVAC

Thank you for your interest in the 27th & Chase Wetwell HVAC Project with the Gary Sanitary District.

This project involves the installation of two (2) air handler units and two (2) condenser units within an active wetwell environment. The work will require a high level of coordination, technical capability, and strict adherence to safety and regulatory standards.

This is a hazardous location, with the presence of sewer gases including H₂S, LEL, oxygen variance, and CO, and all work must be performed in compliance with:

• OSHA confined space and safety requirements

• IDEM regulations for wastewater environments

• NEC and NEMA standards for explosion-proof equipment

Our goal with this process is to ensure all contractors have a clear, consistent understanding of the scope, risks, and expectations before submitting proposals. We are looking for qualified contractors who can deliver a safe, compliant, and fully operational HVAC system in a challenging environment.

We appreciate your participation and encourage open communication, questions, and collaboration throughout this process to ensure project success.

Project Details

• Reference ID: 2026-RFQ-031
• Department: Lift Stations
• Department Head: Arthur Gates (Lift Station Supervisor)

Important Dates

• Questions Due: 2026-03-31T17:00:00.000Z
• Pre-Proposal Meeting: 2026-03-24T17:00:00.000Z — Contractors will have the opportunity to gain clarity on: Drywell and wetwell operating conditions Hazardous gas environment requirements (H₂S, LEL, etc.) Explosion-proof electrical and HVAC expectations IDEM and OSHA compliance standards Project logistics, access, and coordination Attendance is strongly recommended to ensure all bidders have a clear and consistent understanding of project requirements before submitting proposals. A Teams meeting link and scheduled time will be provided upon confirmation of interest. ________________________________________________________________________________ Microsoft Teams meeting Join: https://teams.microsoft.com/meet/2907782183450?p=VnS4DQi86BWNgRX2dT Meeting ID: 290 778 218 345 0 Passcode: Gi9fE9ks

Evaluation Criteria

• The Scope of work shall include the following: —

  SCOPE OF WORK 27th & Chase Wetwell HVAC Project

  Gary Sanitary District

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  1. PROJECT DESCRIPTION

  The Contractor shall provide all labor, supervision, materials, equipment, and coordination required to complete the installation of a dual HVAC system within the wetwell structure at the 27th & Chase facility.

  The project includes installation of:

  • (2) Air Handler Units (AHUs) (provided by Gary Sanitary District)

  • (2) Condensing Units (provided by Gary Sanitary District)

  All work shall be performed in a hazardous wastewater (wetwell) environment and must comply with OSHA, IDEM, NEC, and all applicable codes and standards.

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  2. HVAC EQUIPMENT INSTALLATION

  • Install two (2) air handler units, including:

    • Mounting, anchoring, and alignment

    • Installation of electric heat kits (if applicable)

  • Install two (2) condenser units, including:

    • Proper placement and secure mounting

    • Clearance for airflow and serviceability

  • Provide vibration isolation and support systems for all equipment

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  3. ELECTRICAL WORK

  • Provide and install all required electrical infrastructure, including:

    • Dedicated circuits for each AHU and condenser

    • Disconnect switches for all equipment

    • Breakers, conduits, fittings, and wiring

  • Install control voltage wiring (24V) for HVAC system operation

  • All electrical components must be:

    • Explosion-proof / hazardous location rated

    • Suitable for environments containing:

      • Hydrogen Sulfide (H₂S)

      • Methane / LEL gases

      • Oxygen enrichment

      • Carbon Monoxide (CO)

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  4. REFRIGERATION SYSTEM

  • Install complete refrigerant line sets for both systems:

    • Proper sizing and routing

    • Insulation and protection from corrosion and damage

  • Pressure test, evacuate, and charge systems per manufacturer specifications

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  5. CONDENSATE MANAGEMENT

  • Install condensate drain piping systems for both AHUs:

    • Proper slope and drainage

    • Corrosion-resistant materials

    • Routing to approved discharge location

  • Ensure no impact to wetwell processes or contamination risks

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  6. CONTROLS & THERMOSTAT

  • Install and integrate control systems for both HVAC units

  • Install Wi-Fi-enabled thermostats (provided by Gary Sanitary District)

  • Complete:

    • System programming

    • Calibration

    • Functional testing

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  7. FRESH AIR INTAKE SYSTEM

  • Provide and install fresh air intake(s):

    • Routed from exterior to interior space

    • Sealed to prevent infiltration of hazardous gases

    • Designed for durability in corrosive environments

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  8. STRUCTURAL & PENETRATIONS

  • Perform all required core drilling and masonry penetrations

  • Seal all penetrations:

    • Gas-tight

    • Watertight

  • Provide supports, brackets, and anchoring systems as required

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  9. DEMOLITION & SITE MODIFICATIONS

  • Remove or modify any existing HVAC or related components as required

  • Dispose of materials in accordance with environmental regulations

  • Restore all affected surfaces and structures

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  10. STARTUP & COMMISSIONING

  • Perform complete system startup and commissioning, including:

    • Electrical verification

    • Refrigerant system testing

    • Controls operation

    • Cooling performance validation

  • Provide documentation of system performance

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  11. SAFETY & COMPLIANCE REQUIREMENTS A. HAZARDOUS ENVIRONMENT

  • Work area is classified as a high gas, volatile wastewater environment

  • All equipment must be rated for hazardous locations

  B. OSHA REQUIREMENTS

  • Confined space entry procedures required

  • Continuous gas monitoring (H₂S, LEL, O₂, CO)

  • Lockout/Tagout (LOTO) compliance

  • PPE for hazardous environments mandatory

  C. IDEM REQUIREMENTS

  • Maintain compliance with Indiana Department of Environmental Management (IDEM)

  • Prevent contamination of wastewater systems

  • Protect operational integrity of wetwell processes

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  12. CONTRACTOR RESPONSIBILITIES

  • Provide all labor, tools, equipment, and supervision

  • Coordinate with Gary Sanitary District operations

  • Maintain a safe and clean worksite

  • Minimize disruption to facility operations

  • Verify all field conditions prior to installation

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  13. SPECIAL CONDITIONS (CRITICAL)

  • This is a high-risk installation—strict adherence to explosion-proof and safety standards is mandatory

  • All installations must maintain gas-tight integrity

  • Improper equipment or installation methods will be rejected

  • Contractor must be experienced in wastewater and hazardous location work

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  14. DELIVERABLES

  • Fully installed and operational dual HVAC system

  • Commissioning and startup documentation

  • Warranty documentation

  • As-built drawings (if required)

• Minimum Technical Requirements —

  (provide detail here)

Submission Requirements

• I hereby certify that I have examined and carefully prepared this quote based on all of the above information and I am authorized to submit this quote and accept the terms and conditions of the Contract Agreement. (required)
• Contractor Compliance Requirements (required) —

  Please download the below documents, complete, and upload.

• Additional Information: —

  If applicable

• What is the project location and address? (required)
• Are Contractor Compliance Requirements needed? (required)
• Is the insurance section required? (required)