Steam Tunnel Ventilation Replacement

Form / Attachment / Pricing Sheet

This document outlines the "Electrical Scope of Work" for the "Additional Tunnel Heating" project, specifically detailing the electrical requirements for the "Building 42 Tunnel Ventilation" system. It also includes a "Tunnel Stair Enclosure Ventilation Damper Sequence" and "Under Ground Gas Service" diagram.

• Electrical Scope of Work: Details the disconnection of existing tunnel supply fans, connection of a new make-up air unit, and provision of electrical connections for three 10kW unit heaters. It also specifies requirements for new circuit breakers, panelboard labeling, and load summaries.
• Tunnel Stair Enclosure Ventilation Damper Sequence: Defines the operational sequence for motorized dampers (enabled and disabled states) and an alarm condition for damper failure.
• Under Ground Gas Service: Illustrates the configuration for underground and above-grade steel gas piping, including connections to a 1.5" gas valve and a 1.5" MDPE gas pipe.

This document is crucial for bidders involved in the electrical and mechanical aspects of the tunnel ventilation and heating project. It provides specific technical requirements, component details, and sequence of operations that will directly impact installation, material procurement, and system integration. Bidders must carefully review these details to ensure their proposals accurately reflect the scope and technical specifications.

Form / Attachment / Pricing Sheet

This document contains several permits required for specific work activities at the NIST Boulder Campus. These permits are designed to ensure safety and compliance with regulations before commencing certain operations.

• Roof Access Permit: Requires completion and submission to BSHED prior to accessing rooftops. May require a Project Specific Work and Fall Protection Plan.
• Penetration Permit: For work using standard surface penetration methods. Requires project evaluation, review of "As-Built" drawings, identification of utilities, and adherence to specific controls and instructions. A "STOP WORK" condition is triggered by encountering unexpected utilities, suspect asbestos, or damaging utilities.
• Hot Work Permit: Required for any operation involving open flame, heat producing, or spark creating work (e.g., welding, cutting, grinding). Requires preparation, adherence to fire safety requirements, and approvals.
• Fire Protection System Impairment Permit: Used to request impairments of fire alarms, sprinklers, fire hydrants, and water supply/agent supply. Requires initial request, impairment requirements, and verification of impairment and restoration.
• Excavation Permit: For excavation activities. Requires supervisor/COTR oversight, contact information, project description, and confirmation that locates have been performed and safety issues addressed.

Bidders must be aware of these required permits and the associated advance notice periods and procedures. Failure to obtain necessary permits can lead to work stoppages and contractual issues. The specific requirements for each permit will impact project planning, scheduling, and execution.

Form / Attachment / Pricing Sheet

This document contains architectural and mechanical details related to "Additional Tunnel Heating" for Building 42. It includes demolition plans, details for tunnel stair enclosures, and specifications for mechanical equipment installation on concrete structures.

• Demolition Plan: Outlines the removal of existing ventilation and steam systems, including fans, coils, piping, and pumps. Specific instructions for capping pipes and securing openings are provided.
• Tunnel Stair Enclosure Plan: Details the installation of automatic air dampers within tunnel stair enclosures, specifying quantities and airflow requirements.
• Mechanical Equipment on Concrete Structure: Shows elevation and plan views for new mechanical units, including specifications for a new insulated curb and the mechanical unit itself (Model DGX-P124-H32-MF).
• Concrete Repair and Sealing: Provides details on removing spalled concrete, patching, and applying a weather-resistant barrier coating (SIKA-THOROSEAL-581) and sealant (SIKA-FLEX-NP100) to exterior concrete surfaces.

This document is crucial for bidders to understand the scope of work involving demolition, new installations, and concrete repairs related to the tunnel ventilation system. It provides specific technical details and requirements that will impact material selection, labor, and overall project execution.

Form / Attachment / Pricing Sheet

This document provides schedules for "Additional Tunnel Heating" related to Building 42 Tunnel Ventilation. It details specifications for Automatic Air Dampers, Electric Unit Heaters, and Direct Fired Gas Fired Make Up Air Units.

• Automatic Air Damper Schedule: Lists designations, manufacturers, models, sizes, CFM, velocity, and actuator details for six dampers (AAD-1 through AAD-6).
• Unit Heater Schedule (Electric): Details designations, manufacturers, models, discharge, mounting height, kW, voltage/phase, and total amps for three unit heaters (42-T-UH-001 through 42-T-UH-003).
• Direct Fired Gas Fired Make Up Air Unit Schedule: Provides specifications for one unit (42-MAU-001), including CFM, supply fan data, gas direct heating data, filter data, and operating weight.

This document is crucial for bidders to understand the specific equipment requirements, including types, manufacturers, models, and performance specifications for ventilation and heating components. This information is essential for accurate bidding, procurement, and installation planning.

Form / Attachment / Pricing Sheet

This document details the control sequences for various components of the Building 42 Tunnel Ventilation system, including electric unit heaters, carbon dioxide monitoring, and make-up air units. It serves as a technical specification for the system's operation and integration.

• Electric Unit Heater Control Sequence: Outlines how unit heaters will maintain a space temperature setpoint of 45°F, including fan operation and staging of electric heating elements with minimum runtimes and delays to prevent short cycling.
• Carbon Dioxide (CO2) Concentration Monitoring: Specifies CO2 monitoring for occupied modes, with an alarm setpoint of 900PPM.
• Make-Up Air Unit (MAU) Control Sequence: Details the MAU's components (e.g., 24VAC transformer, outdoor air damper with actuator, microprocessor controller with sensors) and its integration capabilities with a Building Management System (BMS) via BACnet MSTP.
• Supply Fan Sequence: Describes the use of a Variable Frequency Drive (VFD) for the supply fan, programmed for constant speed for air balancing, and lockout conditions.
• Heating Control: Defines heating lockout based on outdoor air temperature (65°F) and the modulation of direct gas burners to maintain supply temperature setpoints.
• Supply Temperature Set Point Control: Indicates that the active supply temperature setpoint can be adjusted remotely by the BMS.
• Alarm Management: Lists various alarms including supply air low limit, dirty filter, direct gas burner, and supply fan alarms, with provisions for remote indication and BMS communication.
• Diagrams: Includes a "STEAM TUNNEL PARTIAL PLAN" and a "MAU SUPPLY FAN CONTROL SEQUENCE" diagram illustrating system components and connections.

This document is crucial for bidders to understand the operational logic, control parameters, and integration requirements for the tunnel ventilation system. It specifies performance expectations, alarm conditions, and how the system interacts with a BMS, which will inform proposals related to installation, maintenance, or system upgrades.

Form / Attachment / Pricing Sheet

This document provides the Mechanical & Plumbing Legend, Abbreviations, Project Information, Drawing Index, and General Notes for all mechanical drawings related to the "Building 42 Tunnel Ventilation" project. It serves as a reference for understanding the symbols, terminology, and general requirements used throughout the mechanical and plumbing plans.

• Mechanical & Plumbing Legend: Defines symbols used for various mechanical and plumbing components, including piping, ductwork, valves, and specialties.
• Abbreviations: Lists common abbreviations used in the mechanical and plumbing drawings.
• Project Information: Includes project location, altitude, and design temperatures.
• Drawing Index: Lists the mechanical and plumbing drawing sheets.
• General Notes: Outlines important information and requirements for contractors, such as site visits, coordination, safety, code compliance, and installation standards.

This document is crucial for bidders to accurately interpret the mechanical and plumbing drawings. Understanding the legends, abbreviations, and general notes is essential for preparing a compliant and accurate bid, as it clarifies the scope of work, technical requirements, and project-specific standards.

Statement of Work (SOW)

To replace the existing steam tunnel ventilation system with new natural gas indirect fired make-up air units (MAUs) at the Department of Commerce (DOC) campus in Boulder, Colorado. The goal is to ensure safe, reliable, and continuous ventilation.

• Demolition: Removal of existing exterior pad-mounted supply fans, associated ductwork, controls, steam and steam condensate piping, insulation, valves, hangers, and condensate pump.

• New Installation: Procurement and installation of two new natural gas indirect fired make-up air units (MAUs), associated ductwork, natural gas piping, trenching, and JCI controls interface. Installation of electric unit heaters and associated controls as per construction documents.

• Structural: Extension of existing exterior equipment housekeeping pad.

• Commissioning: Provision of commissioning services for new equipment and controls in compliance with ASHRAE and NEBB standards.

• Period: 365 calendar days from the notice to proceed. Work will be phased between May 1 and October 31 to mitigate freezing risks.

• Place: NIST Boulder Campus, Building 42, 325 Broadway, Boulder, CO 80305.

• Construction Drawings: Maintain and deliver red-lined construction drawings.

• Accessibility: Ensure all new and existing equipment within project boundaries is safely accessible for operations and maintenance.

• Safety: Develop and submit a site-specific Safety Plan within 7 days of award. Provide all required safety-related equipment and training. Comply with NIST's Contractor Safety Program.

• HSPD-12 Compliance: Comply with Homeland Security Presidential Directive (HSPD)-12 for facility and IT network access. Submit a roster of staff working under the contract.

• Quality Control: Submit a Quality Control Plan within 30 days of award.

• Deliverables: Submit a preliminary construction schedule (Gantt chart) and a schedule of deliverables/submittals within 60 days of Notice to Proceed.

• Site Mobilization: NIST will provide a staging area; additional storage may be available upon approval.

• Identification: Contractor employees must wear visible NIST-provided identification badges.