HVAC_Maintenance_-_Statement_of_Work_-_Bryce_Canyon.docx

Scope / Statement of Work (SOW)

Perform Maintenance and Pest Exclusion on Park Residential Heating Systems Bryce Canyon National Park Utah

Revised Date: May 2023

Table of Contents

1.0 Project Description / Summary

2.0 Objectives

3.0 Background

4.0 Specific Work / Tasks

5.0 Special Conditions / Requirements

6.0 Hazards

7.0 Place of Performance

8.0 Performance Period / Schedule Requirements

1.0 PROJECT DESCRIPTION / SUMMARY:

The National Park Service, Bryce Canyon National Park has 27 housing facilities with forced heating induction residential systems requiring 1-time routine maintenance in accordance with the manufacturers recommendations. Also, the contractor will be tasked with installing pest mitigation fabric as needed to prevent pest intrusion.

2.0 OBJECTIVES:

The goal of this project is to complete routine maintenance and limited repairs to gas-powered, forced air heating systems in park residential housing units. Tasks include cleaning of furnace and blower parts, cleaning of duct work, repairs of leaks in the air supply, air return, combustion air intake, and ventilation systems, and the changing out of filters and belts. This project will also improve residential pest exclusion by ensuring the heating system and its periphery do not allow pest intrusion into residential structures.

3.0 BACKGROUND:

Bryce Canyon National Park (BRCA) uses various types of structures to house park employees. These include single family style homes built in the 1960s, historic cabins that were built in the 1920s and 1930s, apartment buildings and duplexes, and a modern eight room dorm built in 2020. BRCA residential buildings are located above 8000 feet in elevation where winter temperatures place a high demand on heating. Residents typically run their central heating systems beginning in October and may continue usage through April. The park has 27 residential units (Guardian, York, Trane, and Carrier) with gas burning forced air heating systems.

All furnaces and heating systems require regular maintenance to run properly and efficiently. The heating systems at BRCA vary in age and most are due for maintenance servicing. Air supply registers are often located on floors or baseboards and collect dust and other debris over time. Several of BRCA’s heating systems have also had a history of pest issues. Deer mice, packrats, and chipmunks are common wildlife around BRCA residential areas. They often seek shelter in structures and use any means available to them to make entry. Heating systems and duct work are potential points of entry into structures. They can also provide hiding and nesting places once entry is made, and conduit for traveling undetected throughout a building. Pests may leave nesting materials and feces within the heating system which can present human health problems, cause damage to the system, and make the system inefficient. In addition to regular maintenance, this contract seeks to secure heating systems from pest utilization by repairing breaches and installing exclusion measures around potential points of entry. This contract does not include trapping or chemical control of pests.

There are multiple components to this contract. These components are listed in detail in Section 4.0 and summarized here. Each heating system will be inspected for proper and efficient function. Thermostat function and system feedback will be confirmed and calibrated if needed. Proper cycling of all important systems will be checked and adjusted if necessary. If thermostat or cycling issues cannot be addressed through system adjustments, the contractor will include a description of the problem and recommendations for repair in the required reports. Important components of the heating systems will be cleaned, including burners, combustion air intake, combustion chamber, blower motor, heat exchanger, flame sensor, and exhaust systems. The warm air supply and cold air return systems, including ducts, vents, boots, and registers, will be professionally cleaned of all debris.

The warm air supply system, gas lines within the heating unit, and exhaust ventilation system will be professionally inspected for leaks. Leaks in the air delivery systems will be repaired using approved materials. Alignment of ductwork will be inspected and adjusted if needed. All ductwork seams and joints will be inspected and reinforced using approved materials. Gas leaks will be documented and immediately communicated to BRCA staff. The exhaust ventilation system will be inspected and tested for carbon monoxide emissions. Any minor leaks that can be addressed without replacement of parts will be fixed. Major issues requiring part replacement will be documented and reported to BRCA staff.

All air filters will be replaced with new, disposable filters according to the requirements listed in Section 5.0 below. If blower motors use replaceable drive belts, the contractor will replace with new belts according to manufacturer’s specifications. Note: it is the contractor’s responsibility to identify all units utilizing drive belts. The contractor will lubricate any motor parts requiring regular lubrication.

Pest materials, including feces, carcasses, and nests may be encountered during the cleaning phase. All pest materials will be properly disposed of according to special requirements described in Section 5.0. Pest exclusion materials will be installed around all potential points of entry around all heating system components. All potential access points will be documented with photographs and a brief description and then sealed with approved exclusion materials, such as steel wool or hardware cloth. All access points or gaps greater than ¼ inch (roughly the diameter of a pencil eraser) will need to be sealed and secured. The hardware cloth will be a screen mesh of heavy-gauge (16-19 gauge) metal and have an opening size of 1/8 inch or smaller (metal window screen or flexible netting shall not be used). Any sealants will need to be pre-approved by NPS personnel prior to application. Steel wool or similar durable, non-corrosive metallic stuffing material for sealing gaps will be used. Specific areas to focus on include areas around utilities supply conduit, gaps in walls where heater system components are installed, gaps associated with damaged vents, and any other spaces associated with the heating system that would allow pest movement from non-living spaces (garage, crawlspace, outside) to living spaces.

4.0 SPECIFIC WORK / TASKS:

a. Inspection of furnace/heating system components:

1. Duct work

2. Burners

3. Heat Exchanger

4. Blower Motor

5. Registers

6. Intake System

7. Electrical Connections

8. Thermostat

9. Pilot*

10. Gas Supply Lines

11. Venting/exhaust System1

12. Safety Controls

b. Cleaning

1. Duct System; includes warm air supply and cold air return (remove obstructions, debris, etc.)

2. Burners

3. Heat Exchanger

4. Blower Motor

5. Exhaust Ventilation (remove obstructions, debris, etc.)

6. Flame Sensor*

7. Filter Housing

8. Registers

c. Repairs

1. Leaks in Air Delivery System (patchable)

2. Thermostat Adjustments

3. Leaks in Venting System (patchable)

4. Inspect and repair leaks or gaps in furnace boot.

5. Correct misalignments in ductwork and between ducts and furnace components;

re-secure connections in ductwork; reinstall connecting hardware if necessary.

d. Pest Proofing

1. Entire system must be pest proof (ie, no breeches that may allow pest incursion into wall spaces or living quarters.

2. Ensure registers are properly installed/sealed and no gaps are present that would allow pest incursion (gaps equal to or greater than ¼”).

3. Install exclusion materials around HVAC components and utility supply lines at wall penetration points equal to or greater than ¼”

e. Replace

1. Air Filters

2. Drive Belts

3. Lubrication on Motor Parts*

f. Reports

1. Summary of all completed repairs and adjustments for each unit

2. Summary of pest-related issues encountered

3. List of recommended/needed repairs that fall outside scope of contract. Include cost estimates for parts and labor.

*If present or applicable.

5.0 SPECIAL CONDITIONS / REQUIREMENTS:

a. Access to heating systems will vary from unit to unit. Units are occupied by tenants. The park and contractor will need to coordinate work schedules and access to facilities. See Section 8.0 for notification requirements.

b. Historic preservation

1. This project includes units that are historic structures listed on the National Registry of Historic Places. As such, there are regulations governing the modifications of these structures. No major modifications which alter the outside appearance of the buildings will be permitted as part of the exclusionary work detailed in this plan. Any clearly visible exclusion features, such as large metal mesh coverings should be installed on interior surfaces, if possible. Minor exterior features, such as gaps filled in approved materials (see below) are permitted, though park staff must be consulted before the installation of any additional exterior features to ensure compliance with historic preservation. At the park’s discretion, it may be necessary to paint exterior features so they do not disrupt the outward appearance of the building.

c. Approved Materials Specifications The contractor must submit a list of materials and replacement parts to be approved by the park. This list must be submitted at least seven calendar days in advance. Park responses will be issued two days from receipt. The contractor will include important information in the product/material descriptions. All materials must meet the following requirements.

Heating System Maintenance

1. Duct Mastic – use for filling gaps in ductwork; use fiberglass reinforced mesh tape for gaps measuring ¼-inch or larger to support mastic application. Use sheet metal screws and other hardware to connect duct components first, then seal with mastic application.

2. High Temperature Aluminum Foil Tape – must be rated to at least 180 degrees F.

3. Air Filters – replacement filters will be disposable, electrostatic pleated filters; minimum efficiency reporting values (MERV) of replacement filters will be at least 11 but should fall within values issued by each unit’s manufacturer.

4. Replacement Belts – use only manufacturer specified replacement parts Exclusion

1. Hardware Cloth – galvanized or stainless steel; 16-to-19-gauge thickness; ¼-inch mesh (max) to 1/16- inch mesh (min).

2. Rodent control fabric – must be made of non-corrosive materials, such as stainless steel or copper; preferred is a fabric consisting of a mixture of poly fibers and non-corrosive metal wool.

3. Caulking and other adhesives – Exterior polyurethane caulk, dark colored (brown or black)

4. Disinfectants – a spray disinfectant must be used to contain airborne contaminants associated with pest material cleanup. A 10% bleach and water solution may be used on any colorfast surface. For surfaces which may be damaged or altered by bleach, an approved non-bleach disinfectant shall be used. Product labels must be submitted to NPS staff for approval three business days prior to intended usage. Approved products must be used according to label directions.

5. Other Chemicals – any chemical other than approved disinfectants used by the contractor during any process must be approved by the NPS prior to usage. Product information, including labels, safety data sheets, and intended purpose must be submitted to the park ten days prior to intended usage.

d. Cleanup and Material Disposal – The contractor is responsible for disposing of all materials in a safe, approved manner. Materials with harmful contaminants must be properly contained in non-permeable bags of 3.0 mil thickness or greater during removal and transport. Bags must be tied off and secured during transport. Individual work areas must be cleaned at the end of each work period. Project related materials or tools must be removed from residential living areas at the end of each day. Locations for storing supplies and materials onsite must be pre-approved by the NPS.

e. Safety Plan – The contractor must submit a written plan detailing safety measures it will implement to ensure hazardous situations are accounted for and mitigated. These include hazards for the contract crew as well as the park residents. This plan shall include description of personnel and qualifications, specific job hazards and plans for mitigating each, personal protective equipment to be used, and contingency in the case of an accident or injury. The NPS must approve this plan prior to the start of work.

6.0 Reporting

Upon completion of all work tasks, the contractor will provide to the NPS:

· A written summary report that includes a complete inventory of residential HVAC units, and all completed repairs and adjustments completed under the scope of this contract. The report will be organized by each individual unit. Inventory will include make, model, and filter size for each unit.

· A report summarizing any significant pest issues were encountered, including large amounts of rodent feces, nests or obvious nesting materials, or carcasses. The contractor will summarize and report the issue, submit photos, and detail the mitigation actions.

· A written summary of issues and recommended repairs that fall outside the scope of work of this contract. The contractor will provide a cost estimate for each repair/issue, including costs for labor and parts. These estimates will only be used for reference when the NPS develops an Independent Government Estimate (IGE) for future services procurement. Repairs that fall outside the scope of this contract will not be negotiated with the contractor.

7.0 HAZARDS:

This project includes hazards associated with working in confined spaces which could also have animal feces, nests, or carcasses that have the potential to transmit zoonotic diseases if not handled properly. Live animals may also be present. Hantavirus, plague, and Tick-Borne Relapsing Fever are all rodent transmitted diseases that have been confirmed in Bryce Canyon National Park. Hantavirus is especially concerning because it typically infects humans through the respiratory tract when dust or other materials containing the virus are agitated, causing the virus to become airborne. Personal Protection Equipment (PPE) must be used, and all hazardous materials need to be disposed of properly. Many of these housing units are occupied, so it’s imperative that the safety of the occupant(s), in addition to that of the Contractor Crew, is a priority in all work. These hazards need to be considered and proper protections must be in place while working in these areas.

Asbestos containing materials (ACMs) have been detected in BRCA residential structures, although they are not suspected as present in the work areas proposed by this contract. If ACMs are detected by the contractor while carrying out the proposed work, the contractor will temporarily stop work in that specific area and contact park officials immediately. The contractor shall provide documentation of location, suspected material description, approximate quantity, and photos, if possible. Through the NPS Contracting Officer (CO), the park will work with the contractor to determine the appropriate course of action. Any planned tasks that would involve manipulation of the suspected ACMs will be halted until either the park can test the materials and confirm the presence of asbestos is negative or complete abatement if the materials are confirmed for the presence of asbestos.

8.0 PLACE OF PERFORMANCE:

a. Mission 66 Housing District and Seasonal Housing Area and Historic Housing District, Bryce Canyon National Park, Bryce Canyon, Utah

· There are 27 housing units with gas-burning, forced air heating systems that will be part of this contract

· See links below for actual locations of housing units. The units exist in two general areas that are separated by about one-half mile.

· Work will involve entering housing units, including living spaces, garages, and crawl spaces.

· Residences may be occupied during work related to this contract.

· Contractors may not use facilities of residences. The park will provide locations for available restroom facilities for the use of the contractor.

· The park will ensure access to the residences during the acknowledged work schedule.

Google Map location links:

Mission 66 and Seasonal Housing https://goo.gl/maps/h47FeyijwdfkinGv6 Historic Housing District https://goo.gl/maps/PJSyXqggSRLCjj7x5

Mission 66 and Seasonal Housing Historic Housing District

9.0 PERFORMANCE PERIOD / SCHEDULE REQUIREMENTS:

a. Written proposals for requirements must be submitted to the park in advance as stated in the Special Conditions/Requirements, Section 5.0.

b. The contractor will provide a proposed work schedule detailing dates and times work is expected to take place at each house/unit and the expected duration of each. This proposal must be submitted no less than seven calendar days prior to the beginning of work. The park must approve the work schedule and will return a decision within two business days of receipt. The contractor must keep park staff aware of any adjustments in schedule as soon as possible. The park reserves the right to require the stated minimum notification on any schedule adjustments.

c. Work must be completed from Monday through Friday, 08:00 to 17:00 local time.

d. Work may not be completed on Federal Holidays.

10.0 FINAL INSPECTION/ACCEPTANCE OF WORK:

Upon completion of work, the Contractor will notify the NPS For a final inspection. The NPS may provide a list of tasks within the contract scope to be completed by the Contractor. Inspections may occur as individual units are completed. Any damage to structures, utilities, or contents of structures, whether property of the government or the resident, resulting from the work performed by the Contractor will be repaired or replaced in kind by the Contractor. The Contractor will have 10 days from documentation to perform repairs or replacements.

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