Bureau_of_Land_Management_statement_of_work_Revd_1_24_24.docx

Bureau of Land Management (BLM) Wind River / Big Horn District Office Worland Wyoming HVAC Air Handler Retro Fit

1.0 SUMMARY

1.01 Description of Work: The Contractor shall provide management, supervision, labor, supplies, materials, equipment, and tools required to perform the design, removal, and replacement of the existing internal components of the HVAC Air Handler effectively, efficiently, and satisfactorily.

The contractor has limited access to the air handler which is on the second story of the building through a standard three-foot door and up a wood “Ships Ladder” to the equipment. The equipment is supported by the steel beam structure of the roof. The area above the second story ceiling has been covered with a wood deck.

The Contractor shall design and install a fan wall that will match the existing specifications of the “Trane Corporation” air handler: Serial Number U85D50479, Unit Type CCDB41QE0D, BASIC UNIT H5A1R11R0AR, FAN MOTOR 25 H.P., 460 VOLTS, 3 PHASE.

The contractor shall remove and dispose of the existing shaft and vane assemblies, motor, electrical controls which includes the existing variable frequency drive, and install the new fan wall with individual variable frequency drives for each fan, integrate the new controls to the existing building control system, and patch all sheet metal that the removal of equipment created holes in the existing cabinet.

The Contractor shall balance the air flow within the modified air handler to manufacturer specifications.

The contractor shall perform heat / cooling load calculations for the entire building and rebalance the complete HVAC system which has the custom-built Trane air handling unit which provided all the condition air to the building through the VAV boxes. (Optional Bid Item). The contractor shall visit the site to development their calculations for the heating and cooling loads and perform a rebalance of the chilled water, heating water, and air side for the HVAC System. The Government has included the previous rebalance calculations with this scope of work as an attachment A.

1.02 Location of Work: The Wind River/Big Horn District Office, a two-story office building located at 101 S. 23rd Street, Worland, Wyoming.

1.03 Contractor Qualifications: The Contractor shall be State of Wyoming licensed contractor for electrical and mechanical installations. The design and installation of the fan wall shall be performed by a current Trane Corporation trained and certified company / individual.

1.04 Hours of Operation: Working hours for the Contractor shall be between 7:45 a.m. to 4:30 p.m. excluding weekends and federal holidays. The building will be occupied with employees until the air handler is shut down for modification. The contactor shall complete the modification with in 10 working days of equipment shut down. If the Contractor desires to work during periods other than above mentioned work hours the Contractor shall notify the Contracting Officer or designated representative three days in advance of intention to work during other periods and receive written approval from the Contracting Officer. The Contractor shall provide notice forty-eight (48) hours before any interruption in any utility.

1.05 Work Schedule: The contractor shall submit a critical path schedule for the design, manufacturing, delivery, and installation of the fan wall. This schedule shall be submitted with the proposal submission.

1.06 Codes and Standards: Work shall be done in compliance with the most recent of the latest editions of the following:

NFPA 70 – National Electrical Code IMC – International Mechanical Code ASTM A653/A653M-20 -Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process.

2.00 DEFINITIONS

2.01 Conduct of Work: All persons employed by the Contractor shall either be experienced in this type of work or shall work with an experienced person.

This is a performance-based service contract where the requirements are written with results in mind. The contractor shall meet or exceed the standards set forth in this Statement of Work.

3.00 SPECIFIC TASKS

3.01 Design: Shall include all drawings and specifications for the manufacturing and installation of a fan wall capable of matching the existing air flow (25,000 CFM) specifications. The design shall include all calculations for air flow, attachment points to the existing equipment, electrical drawings for the new VFD’s, controller for the equipment installed. The design shall include the integration of the new fan wall to the Metasys system. The design with all calculations and product specifications is required as a submittal during the execution of this scope of work.

3.02 Installation: The contractor shall remove the existing shaft assembly, motor, VFD drive, bearing assemblies and dispose them off government property. All removed items become the property of the contractor.

The contractor shall install the new fan wall per manufacturing instructions. Which includes sealing all holes in the existing cabinet that the removed components created, installation to the buildings electrical system, and coordinating with the BLM controls contractor, which is Johnson Controls Casper Office, 5125 Carroll Court, #400, Evansville, WY 82636 (307) 265-0771.

The Contractor shall balance the modified equipment to manufacturing specifications.

3.03 Balance Entire Building: The contractor shall perform heat / cooling load calculations for the entire building and rebalance the complete HVAC system which has the custom-built Trane air handling unit which provided all the condition air to the building through the VAV boxes. (Optional Bid Item). Submit all calculations, assumptions, and changes to the HVAC system.

The existing HVAC system consists of a single VAV air handler, with variable air volume airside (fan-powered VAV terminals at the perimeter and single-inlet VAV terminals in the core) and hot water reheat coils. The air handler also contains a hot water heating coil for tempering supply air. Heat is provided by a pair of gas-fired boilers and cooling is provided by an air-cooled chiller. Exhaust fans have been provided for the restrooms and breakrooms, and a split-system air conditioner has been provided for the telecom room.

HVAC systems shall be balanced by a qualified testing, adjusting, and balancing (TAB) firm. The TAB firm shall be certified by NEBB or AABC in testing and balancing disciplines required for this project, and with at least one Professional Engineer, registered in Wyoming, and certified by NEBB or AABC as a Test and Balance Engineer.

Air side balance quantities shall be as shown on Sheets M0.1 through M1.5 in the attached Attachment B Mechanical Drawing set. The following systems shall be balanced unless noted otherwise:

· All VAV terminal units and attached diffusers.

· All exhaust fans and attached registers and grilles (except EF-5 in the Warehouse).

· The telecom room is cooled with a dedicated air conditioning system; balancing of this system is not included in the scope of this contract.

Water side balance quantities shall be as shown on Sheets M2.1 and M2.2 in the attached Mechanical Drawing set. The following systems shall be balanced unless noted otherwise:

· All VAV terminal unit reheat coils, baseboard radiator loops, cabinet unit heaters, unit heaters, and AHU-1 preheat coil.

· Main hot water pumps HWP-1 and HWP-2 (located in the boiler room) flow rates shall be set at 61.5 GPM each; total dynamic head should be approximately 25’ H2O at this flow rate.

· No balancing valves are installed in the unit heater loop in the Warehouse section of the building; throttling of this loop to 16 GPM can be accomplished with a shutoff valve above the ceiling in the women’s locker room.

· The chilled water flow rate shall remain at 86 GPM as shown on Sheet M0.1, since the minimum evaporator flow rate for the installed chiller is 71 GPM and the chilled water delta T was originally set at 14 degrees F.

Prepare and submit a testing, adjusting, and balancing (TAB) report upon completion of TAB work.

4.0 SUBMITTALS:

4.01 Scope: Submittals shall include but are not limited to design, equipment specifications, methods, and work schedules.

4.02 Licenses: The Contractor shall submit credentials that the company / individuals working on the project are trained and certified by “TRANE Corporation”.

The Mechanical Contractor has a minimum of a journeyman license for HVAC in the State of Wyoming or is certified by “TRANE Corporation.”

The Electrical Contractor has a minimum of a journeyman license for electrical installations.

Submit resume of the testing and balancing agency, including qualifications of personnel to be used, and authority and responsibilities of personnel.

The contractor is required to submit copies of all certifications and state license prior to the Pre-Work Conference to the Contracting Officer (CO).

4.03 Fire & Safety Plan: It is the responsibility of the Contractor to submit a Safety Plan and a Fire Plan to the Contracting Officer prior to or at the Pre-Work Conference. NOTE: A fire watch shall be incorporated with in the fire and safety plan for one hour after all cutting and grinding operations have stopped for the day.

4.04 Requirements: Allow at least five (5) working days for submittal review. Review time commences upon receipt by the Contracting Officer. The original and two (2) copies of each submittal shall be delivered to the Contracting Officer. One electronic submittal is also acceptable in PDF format sent to the Contracting Officer (CO) via E-mail.

4.05 Identification of Submittals: Completely identify each submittal by showing at least the following information:

4.05.1 Name and address of submitter, plus name and telephone number of the individual to contact for further information.

5.0 SUPPORTING INFORMATION:

5.01 Period of Performance: This is a 120-day period of performance contract. The contractor shall have 120 calendar days from the date of the Notice to Proceed (NTP) for the design, manufacturing, installation, equipment balance and any optional item awarded. The contractor shall have 10 working days to complete the modification of the air handler where building is un-occupied by the government.

5.02 Contractor-Furnished Materials:

5.02.4 Contractor shall submit to the Contracting Officer (CO) a daily diary listing all personnel and trades on site including a detail description of work performed. Daily cutting and grinding operations shall be noted in the daily diary including the stop times for those activities.

5.03 Key Personnel: The contractor shall identify and submit to the contracting officer (CO), by name, within ten (10) days of award the key management, technical, and/or instructor personnel who will work under this contract. All individuals listed shall sign in and out each time at the front desk.

5.04 Disposal of Debris: All waste materials will be disposed of off-site. Disposal of materials must be performed in a legal manner and payment of fees required is the Contractor's responsibility.

5.05 Quality Assurance: Codes and Standards: The work shall comply with Federal, State, and local codes and standards, following the most stringent, applicable to each type of work and as listed in the individual sections of this Statement of Work.

5.06 Pre-Work Conference:

5.07.2 If Contracting Officer does not find the post-work site conditions acceptable, the Contractor will be required to remedy the conditions accordingly.

6.0 Quality Assurance

6.01 Qualifications: All workers shall be experienced in performing work that is specialized in HVAC and electrical of work similar to that required for the project.

6.02 Quality Assurance: Product certificates signed by manufacturer certifying materials comply with specified performance characteristics, criteria, and physical requirements specified in the Manufacturer’s Installation Instructions.

7.0 TECHNICAL PROPOSAL CONTENTS: (These Items to be Submitted with Proposal)

7.01 Qualifications and Experience of Key Personnel:

Offerors shall submit a one (1)-page resume of all key personnel proposed for this contract. For this contract, the following positions have been determined as key: HVAC Technician, Electrician, and a Programmer with direct digital control system.

7.02 Performance:

Offerors shall submit a list of clients for past and present similar projects covering the past three (3) years (maximum of five (5) clients). Provide contact name, address, phone number, fax number, and e-mail address. The Government will survey these clients to obtain past performance information (quality, timeliness, cost control, and business relationships) related to the offeror’s current and past work.

7.03 Quality Control Plan:

Offerors shall submit a Quality Control Plan showing how they intend to meet Government performance standards for each task associated with this contract.

7.04 Technical Approach:

Offerors shall submit an executive summary on their approach to this project.

8.00 EVALUATION OF FACTORS FOR AWARD

45% Cost / 55% Evaluation

9.00 MEASUREMENT AND PAYMENT

9.01 Base Item No.1 - Mobilization

Payment: This contract Lump sum price as shown in the Schedule of Items includes all preparatory work and operations necessary for the movement of personnel, equipment, supplies, and incidentals to the project site, and for all other work and operations that must be performed or that cause costs to be incurred prior to beginning work. Include project management, bonding, dumpster rental and dump charges.

9.02 Base Item No. 2 – Design and installation of the fan wall.

Payment: This contact Lump Sum price as shown on the Schedule of Items includes all materials, equipment, labor, and incidentals to remove the existing shaft assemble and vanes, design the fan wall, balance the equipment to original factory specifications, installation of the fan wall including all electrical and integration to the existing control monitoring system.

9.02 Optional Item No 3 – Perform HVAC balance of the entire building.

Payment: This contract Lump Sum price as shown on the schedule of item includes all materials, equipment, labor, and incidentals to balance the HVAC system in the building.