(DRAFT)_SOW_-_PSTE152605_Repair_HVAC_Basewide.docx

26 June 2019

PSTE152605

Repair HVAC Basewide

Statement of Work (SOW)

BACKGROUND

The 169th Fighter Wing requires facilities that are adequately sized, configured, and conditioned to support the functions in various facilities that provide direct and indirect support to the flying mission. The air-conditioning, chillers, and boiler systems are required to be energy efficient and maintainable to provide the proper environment to meet the various mission needs. The Air National Guard is required to comply or exceed all environmental mandates associated with the phase out of hydro chlorofluorocarbon (HCFC). A fully operational smart meter monitoring system is required by 2020 to meet DoD guidance.

SCOPE OF WORK - General Description:

Install high efficiency chillers, split systems, and package systems with high efficiency air conditioning and chiller systems. Replace boilers with high efficiency boilers. Upgrade existing DDC system to current standards. Install electric, natural gas, and water smart meters.

The existing chillers, split, and package systems identified within this project are the aging systems that are dependent upon R-22 Freon. The Clean Air Act and the Montreal Protocol require the United States to phase out the consumption of HCFC’s to include ceasing the production and importing of R-22 after 2019. The phasing out of R-22 is escalating the cost of maintenance of these air conditioning units available stocks dwindle and manufacturers phase out production. All R-22 units will be disposed of off base by the contractor. Report the total volume of disposed R-22 to the 169 CES.

Many of the existing units have minor leaks identified and require periodic maintenance to maintain a charge. The units identified herein will be at or beyond their useful life expectancy before 2020. The efficiency of some of these older systems are almost half that of their high efficiency upgraded equipment. The boilers identified within this project are approaching their useful life expectancy and were minimum efficiency boilers when installed. The current smart meters fall short of the 2020 requirement to monitor electronically 85% of the energy used on the installation and the system requires updating to allow for remote monitoring. Additional meters are required through this project as well as upgrading the central monitoring system.

The facilities should be compatible with applicable DoD, Air Force, and base design standards. All quantities identified within the table should be utilized for planning purposes only and will require on-site verification.

Areas Served & Special Requirement

The table below lists the areas served by the equipment to be replaced under this project and by the Energy Management System (EMS) meters being added under this project. Refer to the design submittal and specs.

Air Traffic Control Tower

Wing Logistics Office

Dining Hall/Joint Medical Facility

1. Mechanical

1.1. Design Criteria

The design will be guided by the applicable portions of Air National Guard, Unified Facility Criteria, and other applicable publications. All non-government codes and references that will be used include, but are not limited to, the following:

UFC 1-200-01 DoD Building Code (General Building Requirements) 20 June 2016

· UFC 3-400-02 Design: Engineering Weather Data, 28 February 2003

· UFC 3-401-01 Mechanical Engineering, 1 July 2013 (up to Change 1, October 2015)

· UFC 3-410-01 Design: Heating, Ventilating, and Air Conditioning Systems, 1 July 2013 (up to Change 4, November 2017)

· ANGETL 15-01-04 Mechanical Engineering

· AFPAM 32-7089 Refrigerant Management

· International Mechanical Code 2015

1.2. Building No. 157 – Canteen/Credit Union/BX

The building houses the Canteen, Credit Union and BX. Building heating is provided by one 339 MBH (output rating) gas fired heating water boiler; the boiler is approximately 22 years old and near the end of its useful service life. Air conditioning is provided by several self-contained air conditioning units. There is one R-22, 2-ton rooftop air conditioning unit which serves the Credit Union ATM Lobby. All other air conditioning units serving the facility utilize R410a refrigerant.

The heating water boiler will be removed and replaced with a gas fired condensing type boiler. New boiler controls, piped combustion air intake, flue and heating water circulating pump will be provided. The new controls will be integrated with the existing base-wide Energy Management System (EMS).

A block heating load calculation has been performed for the facility to confirm the required replacement boiler capacity. The calculated block heating load for the facility is 234 MBH. The new boiler capacity will be no less than 340 MBH (output).

The 2-ton R-22 rooftop air conditioning units will be replaced with a 2-ton rooftop heat pump unit utilizing R-410a refrigerant. Space temperature and air conditioning unit status will be monitored by the existing base- wide EMS. The air conditioning unit stop/start command will be integrated with the existing base-wide EMS.

A new electric digital meter will be provided to monitor incoming electrical power and communicate the metering data back to the base-wide EMS. The metering equipment will be located indoors.

1.3. Building No. 200 – Star Base

The building has served several functions over the years and currently supports pilot training activities. Air conditioning is provided by several split system heat pumps. There are three R-22 heat pumps. Two of the R-22 heat pumps are 1.5-ton mini-split types and serve second floor office areas. The third R-22 heat pump is a 5-ton duct type unit and serves a ground floor classroom area. The split system condensing units are air cooled located outdoor adjacent to the facility.

The three-split system heat pump units will be replaced with split system heat pump units utilizing R-410a refrigerant. The replacement units will have capacities which match the existing units. The unit replacements will include new refrigerant piping. Space temperature and air conditioning unit status will be monitored by the existing base-wide EMS. The air conditioning unit stop/start command will be integrated with the existing base-wide EMS.

1.4. Building No. 210 – Vehicle Maintenance Complex

The building includes vehicle washing bays, vehicle service bays, administrative and support spaces. There is no known R-22 air conditioning equipment serving the facility.

A new electric digital meter, natural gas flow meter and water flow meter will be provided to monitor the incoming utilities and communicate the metering data back to the base-wide EMS. The metering equipment will be located indoors.

1.5. Building No. 243 – Pilot Conditioning Facility (Gym)

The building includes gymnasium work out spaces and shower/locker rooms. There is no known R-22 air conditioning equipment serving the facility.

A new electric digital meter, natural gas flow meter and water flow meter will be provided to monitor the incoming utilities and communicate the metering data back to the base-wide EMS. The metering equipment will be located indoors.

1.6. Building No. 258 – Communications Facility

The facility includes several server rooms and administrative areas. Heating to the facility is provided by a gas fired heating water boiler which is approximately 5 years old. Air conditioning to administrative and common areas are served by a split system air handling unit with direct expansion cooling coil. The air conditioning equipment is approximately 5 years old. Server rooms are air conditioned by split system computer room units. Except for the floor mounted computer room units serving Vault 129 (server room and two adjacent offices), all the air conditioning equipment serving the facility utilizes R-410a or R-407c refrigerant. The computer room air conditioning unit serving Vault 129 has a 5-ton cooling capacity, utilizes R-22 refrigerant and is approximately 10 years old.

The computer room air conditioning unit serving Vault129 will be replaced with a 5-ton computer room air conditioning unit which utilizes R-410a refrigerant. The replacement unit will include a remote air-cooled condenser located outdoors and refrigerant piping.

Because Vault 129 houses server equipment which cannot be relocated or taken off-line, a new 3-ton ceiling mounted computer room air conditioning unit is proposed to be installed to serve the server room only and would be installed prior to removal of the existing unit in order to maintain continuous cooling to the server room. The new ceiling mounted computer room air conditioning unit will include a remote outdoor air-cooled condenser and refrigerant piping. The 3- ton unit is intended to provide standby cooling for the server room and can also be operated automatically at night in lieu of the 5-ton unit, when the offices are unoccupied and do not require cooling. Space temperature and air conditioning unit status will be monitored by the existing base-wide EMS. The air conditioning unit stop/start command will be integrated with the existing base-wide EMS.

1.7. Building 279 – Barrier Shed

The facility is a metal communications/electronics enclosure and is provided with air conditioning by a 2-ton R-22 wall air conditioning unit. The wall air conditioning unit will be replaced with a 2-ton wall air conditioning unit which utilizes R-410a.

1.8. Building No. 310 – Munitions Compound

The building includes administrative areas and several munitions bays. There are three known R-22 air conditioning units serving the facility. Two of the units are 4-ton rooftop air conditioning units with electric heat. One of the units is a 2-ton mini-split heat pump and serves Office 102A. The min-split heat pump condensing unit is located outdoor adjacent to the facility.

The rooftop air conditioning units will each be replaced with a 4-ton R-410a rooftop heat pump units. New roof curbs will be provided. Space temperature and air conditioning unit status will be monitored by the existing base-wide EMS. The air conditioning unit stop/start command will be integrated with the existing base-wide EMS.

The mini-split heat pump will be replaced with a 2-ton R-410a mini-split heat pump. The replacement unit will include new refrigerant piping. Space temperature and air conditioning unit status will be monitored by the existing base-wide EMS. The air conditioning unit stop/start command will be integrated with the existing base-wide EMS. Space temperature and air conditioning unit status will be monitored by the existing base- wide EMS. The air conditioning unit stop/start command will be integrated with the existing base-wide EMS.

1.9. Building No. 666 – GCA/RAPCON Support Trailer

The building is not typically occupied and is a temporary support facility. There is no known R-22 air conditioning equipment serving the facility.

A new electric digital meter will be provided to monitor the incoming electric power to the facility and will communicate the metered data back to the base-wide EMS. The metering equipment will be located indoors.

1.10. Building No. 858 – Airfield Lighting Vault

The facility house airfield lighting controls and power transformers. There is no known R-22 air conditioning equipment serving the facility.

A new electric digital meter will be provided to monitor the incoming electric power to the facility and will communicate the metered data back to the base-wide EMS. The metering equipment will be located indoors.

1.11. Building No. 878 – Air Traffic Control Tower

The facility includes the air traffic control cab, server rooms, a simulation room, exercise room and administrative spaces. Cooling to the facility is provided by two 18-ton air cooled chillers which utilize R-22 refrigerant. The chillers are approximately 15 years old.

A block cooling load calculation has been performed for the facility to confirm the required replacement chiller capacities. The calculated block cooling load for the facility is 26 tons. It was reported by the chiller staff that during cooling design day conditions, both chillers operate at approximately 75% of their full load capacity. The design will therefore be based on both chillers operating during design cooling conditions. Each chiller will be replaced with 18-ton air cooled chiller which utilize R-410a; this equates to one chiller being sized for approximately 70% of the design load. The chiller controls will be integrated with the with the existing base-wide EMS.

A new electric digital meter and natural gas flow meter will be provided to monitor the incoming utilities and communicate the metering data back to the base-wide EMS. The metering equipment will be located indoors.

1.12. Building No. 958 – Wing Logistics Office

The building includes administrative spaces. Air conditioning is provided by two R-22 split system air conditioning units with gas fired furnaces. One of the split systems is 1.5- ton capacity and utilizes a horizontal above ceiling indoor unit. The other split system is 6 tons capacity and utilizes a floor mounted vertical indoor unit located in the mechanical room.

The split system condensing units are air cooled located outdoor adjacent to the facility.

The split system units will be replaced with units which utilize R- 410a refrigerant. The replacement unit capacities and configurations will match the existing units. The replacement units will include direct expansion cooling coil, air-cooled condensing unit, refrigerant piping, gas furnace, piped combustion air intake and flue. Space temperature and air conditioning unit status will be monitored by the existing base-wide EMS. The air conditioning unit stop/start command will be integrated with the existing base-wide EMS.

A new electric digital meter will be provided to monitor the incoming electric power to the facility and will communicate the metered data back to the base-wide EMS. The metering equipment will be located indoors.

1.13. Building No. 984 – Dining Hall/Joint Medical Facility

The facility includes a dining hall, kitchen facility and outpatient medical facility. There is no known air conditioning equipment serving the facility that utilizes R-22 refrigerant.

Heating to the facility is provided be two gas fired heating water boilers (880 MBH output each). The boilers are approximately 16 years old.

The two-heating water boiler will be removed and replaced with a gas fired condensing type boiler. New boiler controls, piped combustion air intake, flue and heating water circulating pump will be provided. The new controls will be integrated with the existing base-wide Energy Management System (EMS).

A block heating load calculation has been performed for the facility to confirm the required replacement boiler capacity. The calculated block heating load for the facility is 682 MBH. Each new boiler will have a capacity no less than 700 MBH output.

A new electric digital meter will be provided to monitor the incoming electric power to the facility and will communicate the metered data back to the base-wide EMS. The metering equipment will be located indoors.

1.14. Building No. 1053 – NDI Laboratory

The facility includes non-destructive inspection labs and support spaces. There is no known R-22 air conditioning equipment serving the facility.

A new electric digital meter will be provided to monitor the incoming electric power to the facility and will communicate the metered data back to the base-wide EMS. The metering equipment will be located indoors.

1.15. Building No. 1057 – ECM Shop

The facility includes an electronics shop, storage and administrative space. There is no known R-22 air conditioning equipment serving the facility.

A new electric digital meter will be provided to monitor the incoming electric power to the facility and will communicate the metered data back to the base-wide EMS. The metering equipment will be located indoors.

1.16. Building No. 1060 – HAZMART Pharmacy

The facility provides storage and dispensary of chemical used around the base which pose the potential to be hazardous. The facility includes storage spaces and office space. Heating and air conditioning is provided to the office space by a 1.5-ton R-22 split system air conditioning unit gas furnace located within the mechanical room. The split system condensing unit is located outdoors adjacent to the facility.

The split system unit will be replaced with a 1.5-ton capacity split system air conditioning unit utilizing R-410a refrigerant. The unit replacements will include direct expansion cooling coil, air-cooled condensing unit, refrigerant piping, furnace, a piped combustion air intake and flue. Space temperature and air conditioning unit status will be monitored by the existing base-wide EMS. The air conditioning unit stop/start command will be integrated with the existing base-wide EMS.

1.17. Building No. 1147 – Aircraft Support Equipment Facility The building includes work bays, a wash bay, training/break rooms and administrative spaces. The administrative spaces and training/break rooms are served by a 7.5-ton R-22 split system heat pump. The split system condensing unit is located outdoor adjacent to the facility

The split system heat pump unit will be replaced with 7.5-ton split system heat pump unit utilizing R-410a refrigerant. The replacement unit will include an air handling unit, air-cooled condensing unit and refrigerant piping. Space temperature and air conditioning unit status will be monitored by the existing base-wide EMS. The heat pump unit stop/start command will be integrated with the existing base-wide EMS.

1.18. Building No. 1163 – Eagle Vision Facility

The building includes administrative spaces and pallet storage area. Heating and air conditioning to the facility is provided by two 5-ton split system heat pump units which utilize R-22 refrigerant. The indoor units are horizontal type, located above a gypsum board ceiling. A 24” x 24” access panel is provided in a janitor’s Closet for access to the ceiling space. Access to the units for service is difficult. The split system condensing units are located outdoors adjacent to the facility.

The split system heat pumps will be replaced with 5-ton split system heat pump units utilizing R-410a refrigerant. Each replacement unit will include an air handling unit, air-cooled condensing unit and refrigerant piping.

Space temperature and air conditioning unit status will be monitored by the existing base-wide EMS. The air conditioning unit stop/start command will be integrated with the existing base-wide EMS.

Addition access via the mezzanine of the pallet storage area will be provided for servicing the equipment above the gypsum board ceiling. A new catwalk will be provided from the pallet storage mezzanine access point to the equipment above the ceiling.

2. Electrical

2.1. Design Criteria

The branch circuit conductors, local safety switches, local starters and the branch circuit breakers in the panelboards serving the existing HVAC equipment being replaced will be removed and replaced. With the exception on Building No. 878 chiller feeders, existing conductors and associated conduit will be removed all the way to the point of the electrical power source and new conductors properly sized for the new HVAC equipment will be installed inside new conduit. Building No. 878 chiller feeders will be new and installed inside the existing underground conduit.

New electric digital meter will be provided to monitor incoming electrical power and communicate the metering data back to the base-wide EMS where indicated. The metering equipment will be located indoors. The location of the new current transformers (CT’s) will depend on the space available inside the existing panelboards.

The design of all electrical systems will comply with the applicable codes as referenced by the Department of Defense Unified Facilities Criteria (UFC) program. Materials, equipment and systems shall meet the pertinent requirements of the following list of applicable codes and standards as referenced by the UFC:

· UFC 1-200-01 DoD Building Code (General Building Requirements) 20 June 2016

· UFC 3-501-01 Electrical Engineering, 6 October 2015

· UFC 3-520-01 Interior Electrical Systems, 6 October 2015

· UFC 3-550-01 Exterior Electrical Power Distribution, 1 September 2016 (up to Change 1, 23 March 2017)

· UFC 3-560-01 Operation and Maintenance: Electrical Safety, 24 July 2017

· NFPA 70 National Electrical Code

· NFPA 70B Recommended Practice for Electrical Equipment Maintenance

· NFPA 70E Standard for Electrical Safety in the Workplace

· International Electric Code 2015

2.2. Building No. 157 – Canteen/Credit Union/BX

New 240-volt branch circuit conductors for the replaced gas fired heating water boiler controls, the replaced pump and the replaced chemical feeder will be installed in the existing conduits and connected to new branch circuit breakers in existing panelboard ‘LD’ located in the Mechanical Room where the boiler is located. New safety switches for the boiler and pump and new starter for the pump will be provided.

New 208-volt branch circuit conductors for the replaced rooftop air conditioning unit (which serves the Credit Union ATM Lobby) will be installed in the existing conduit and connected to a new branch circuit breaker in existing panelboard MDP ‘A’ located in the Storage Room adjacent to the Mechanical Room. A new NEMA 3R safety switch will be provided.

New wiring will be provided and integrated from the new boiler controls to the existing base-wide Energy Management System (EMS).

2.3. Building No. 200 – Star Base

The electrical for the three separate split system heat pump units will be replaced. The replacement will include new NEMA 3R safety switches and new 208-volt conductors in new conduit from each new safety switch to new branch circuit breakers in the existing panelboard feeding the units.

2.4. Building No. 210 – Vehicle Maintenance Complex

No new electrical work is required, other than the new wiring for the meters to the base-wide EMS.

A new electric digital meter, natural gas flow meter and water flow meter will be provided to monitor the incoming utilities and communicate the metering data back to the base-wide EMS. The metering equipment will be located indoors where applicable. New wiring will be provided from the respective meter to the base- wide EMS.

2.5. Building No. 243 – Pilot Conditioning Facility (Gym)

No new electrical work is required, other than the new wiring for the meters to the base-wide EMS.

A new electric digital meter, natural gas flow meter and water flow meter will be provided to monitor the incoming utilities and communicate the metering data back to the base-wide EMS. The metering equipment will be located indoors where applicable. New wiring will be provided from the respective meter to the base- wide EMS.

2.6. Building No. 258 – Communications Facility

The electrical for one condensing unit (CU) and the associated air handling unit (AHU) will be replaced and the electrical for one new CU and one new AHU will be provided. The replacement and new work will include new NEMA 1 or NEMA 3R safety switches, new208-volt branch circuit conductors in new conduit from each safety switch to new branch circuit breakers in existing panel BP located in Vault Room 131.

2.7. Building 279 – Barrier Shed

The electrical for the wall air conditioning unit will be replaced with a new connection and connected to a new branch circuit breaker on the existing panel inside the shed.

2.8. Building No. 310 – Munitions Compound

The electrical for the two roof top units and for the split system will be replaced. The replacement will include new NEMA 1 or NEMA 3R safety switches and new 208- volt conductors in new conduit from each new safety switch to new branch circuit breakers in the existing panelboards MDP, PP1 and EP feeding the units and located in Mechanical Room108.

2.9. Building No. 666 – GCA/RAPCON Support Trailer

No new electrical work is required, other than the new wiring for the digital electrical meter to the base-wide EMS.

2.10. Building No. 858 – Airfield Lighting Vault

No new electrical work is required, other than the new wiring for the digital electrical meter to the base-wide EMS.

2.11. Building No. 878 – Air Traffic Control Tower

The electrical for the two chillers will be replaced. The replacement will include new NEMA 3R safety switches and new 480-volt conductors in existing conduit from each new safety switch to new branch circuit breakers in the existing main distribution switchboard MDS feeding the chillers.

2.12. Building No. 958 – Wing Logistics Office

The electrical for the two split systems will be replaced. For AC-958-1, the replacement will include new NEMA 1 safety switch and conductors in existing conduit fed from existing panelboard PD.

For AC-985-2 the replacement will include one NEMA 3R safety switch for outside condensing unit and two new NEMA 1 safety switches one for each Air Handler (back to back inside units). New conduits and wiring will be provided for each new safety switch to new branch circuit breakers in the existing panelboard PD located in the Tools Storage room 110 feeding the units. Finally, from proposed new safety switches location new conduits and wiring to be provided until the proximity of the units, then transition from EMT conduit to flexible conduit will be provided to terminate connection for the Air Handlers.

2.13. Building No. 984 – Dining Hall/Joint Medical Facility

New 120-volt branch circuit conductors for the replaced gas fired heating water boiler controls, the replaced pumps and the replaced chemical feeders will be installed in the existing conduits and connected to new branch circuit breakers in existing panelboard ‘LA1’ located in the Mechanical Room where the boiler is located. New safety switches for the boilers and pumps and new starters for the pumps will be provided.

2.14. Building No. 1053 – NDI Laboratory

No new electrical work is required, other than the new wiring for the digital electrical meter to the base-wide EMS.

2.15. Building No. 1057 – ECM Shop

No new electrical work is required, other than the new wiring for the digital electrical meter to the base-wide EMS.

2.16. Building No. 1060 – HAZMART Pharmacy

The electrical for the split system will be replaced. The replacement will include new NEMA 1 or NEMA 3R safety switches and new 208- volt conductors in existing conduit from each new safety switch to new branch circuit breakers in the existing panelboard A located in the Mechanical room feeding the unit.

2.17. Building No. 1147 – Aircraft Support Equipment Facility The electrical for the split system will be replaced. The replacement will include new NEMA 1 or NEMA 3R safety switches and new 208- volt conductors in existing conduit from each new safety switch to new branch circuit breakers in the existing panelboard PP located in the Mechanical room feeding the unit.

2.18. Building No. 1163 – Eagle Vision Facility

The electrical for the two split system heat pumps in the attic will be replaced. The replacement will include new NEMA 1 safety switches and new 208-volt conductors in existing conduit from each new safety switch to new branch circuit breakers in the existing panelboard A located in the Mechanical room below the attic feeding the units.

3. Architectural

3.1. Design Criteria

The design will be guided by the applicable portions of Army Regulations, Unified Facility Criteria, Army Technical Manuals, and other applicable publications. All non-government codes and references that will be used include, but are not limited to, the following:

· UFC 1-200-01 DoD Building Code (General Building Requirements) 20 June 2016

· UFC 3-101-01 Architecture, 28 November 2011 (up to Change 3, 20 June 2016)

· UFC 3-120-10 Interior Design, 15 June 2006 (up to Change 1, July 2007)

· UFC 3-190-06 Protective Coatings and Paints, 16 January 2004

· International Building Code 2015

3.2. General

Architectural work for this project is limited to the specific areas/locations described below.

3.3. Building No. 157 – Canteen/Credit Union/BX

The existing built-up roof system will be repaired as required for the rooftop air conditioning unit replacement.

3.4. Building No. 200 – Star Base

The existing interior walls at the mini-split wall unit locations will be repaired and repainted.

3.5. Building No. 258 – Communications Facility

Existing 2x4 ceiling grid and tiles will be removed, stored and re-installed as required.

3.6. Building No. 310 – Munitions Compound

Existing 2x4 ceiling grid and tiles will be removed, stored and re-installed as required for refrigerant piping replacement.

Existing drywall ceilings will be removed and repaired as required for refrigerant piping replacement.

The existing built-up roof system will be repaired as required for the rooftop air conditioning unit replacement.

3.7. Building No. 958 – Wing Logistics Office

Existing 2x4 ceiling grid and tiles will be removed, stored and re-installed as required for equipment and refrigerant piping replacement.

Existing drywall ceilings will be removed and repaired as required for refrigerant piping replacement.

3.8. Building No. 1163 – Eagle Vision Facility

A new access opening and door will be provided at the pallet storage area mezzanine level for access to the air conditioning units located above the gypsum board ceiling.

3.9. Limited Asbestos Survey

A limited asbestos survey has been performed to identify, sample and physically assess suspect asbestos- containing building material (ACBM) associated with the disturbances which will be encountered on this project. The limited asbestos survey was performed in the following facilities:

· Building No. 243: Survey of Woman’s locker room ceiling tiles which will be disturbed for the proposed water meter installation.

· Building No. 258: Survey of the Vault 129 and Room 127 ceiling tiles which will be disturbed for the proposed equipment and piping installation.

· Building No. 310: Survey of the office and restroom ceiling construction which will be disturbed for the proposed piping installation.

· Building No. 958: Survey of the ceiling construction which will be disturbed for the proposed equipment and piping installation.

· Building No. 1060: Survey of the construction which will be disturbed for the proposed equipment and piping installation.

· Building No. 1163: Survey of the ceiling construction which will be disturbed for the proposed equipment and piping installation.

The survey results indicate that none of the samples collected contain asbestos >1%. Refer to Part 1, Tab F – Asbestos Appendix for the survey reports.

4. Structural

4.1. Design Criteria

The following references have been used in developing the structural design:

· UFC 1-200-01 DoD Building Code (General Building Requirements) 20 June 2016

· UFC 3-301-01 Structural Engineering, 1 June 2013 (up to Change 3, 12 September 2016)

· International Building Code, 2015 editions

4.2. Additive Bid Item: Optional Access to HVAC System

The air conditioning units being replaced are located above a hard ceiling and access to the ceiling space is limited to a single ceiling access panel located in the Janitor’s closet which makes it difficult to access and maintain the equipment above the ceiling. A new method for accessing the equipment has been requested by the base, in order to improve maintenance on the equipment above the ceiling which is being replaced under this project.

The existing Eagle Vision IV Facility building at the McEntire Air National Guard Station is a pre-engineered tapered metal frame building with concrete and brick masonry exterior walls. The interior is mostly framed with light gauge studs and enclosed by a suspended ceiling. The metal frame was designed and manufactured by Butler Manufacturing Company in 2003. In the center of the building, over the two bathrooms, there are two HVAC units. In order to easily service these units, a catwalk is being proposed over the bathroom and next to the units. Two feasible options for the construction and support of the catwalk are: 1) Option 1: Support the catwalk from the metal frame of the building, or 2) Option 2: support the catwalk from new framing in the existing bathroom walls.

Option 1: This option would provide support of the catwalk from the metal frame of the building. The engineering design of steel tapered frames is a specialized field with pre-engineered metal building manufacturers using proprietary designs. The addition of any loads to the existing pre-engineered metal building structure must be designed by the pre-engineered metal building manufacturer (Butler Manufacturing Company).

The proposed catwalk support system may consist of HSS tube steel columns welded to the existing building roof framing. These columns would support the catwalk frame and handrails which could also be made out of HSS tubes, or another steel shape. The floor of the catwalk would consist of a steel or fiberglass grating. New bracing may be required between the existing beams and purlins with the addition of the catwalk and its hangers. A possible layout of such a catwalk can be seen in the figure below.

Any attachments and additional building reinforcement shall be the responsibility of the contractor. The contractor shall provide signed and sealed shop drawings and calculations for the catwalk engineering, additional framing reinforcement, and their attachment to the existing structure. These items shall be included in the bid for the catwalk construction.

Roof Framing Plan – Option 1 Catwalk Platform and Hanging Column Locations Concept

Option 2: This option would provide support of the catwalk from below and would not add load to the existing pre-engineered metal building framing system. This option would be to support the catwalk from below by adding columns into the existing bathroom walls and using a pre-fabricated catwalk or mezzanine platform. A number of vendors can provide such platforms that would include the required handrails and platform supports as well. The installation of this type of platform would require the partial demolition of the existing bathroom walls. Platform support columns would be installed within the line of wall framing so that the columns would not take up usable space. Additional foundations may need to be poured, depending upon the layout of the existing foundations. The framing of the catwalk would be similar to what is described in Option 1, except that the columns would not extend to the roof framing, but to the foundation below. A conceptual layout of the platform and the support columns framing into the foundation can be seen in the figure below.

Floor Plan – Option 2 Catwalk Platform and Column Locations Concept

Each option has its own unique method of constructability. Option 1 would require the involvement of Butler Engineering and a specialty engineer for the catwalk. Option 2 would be disruptive to the First Floor spaces below for the installation of new columns and potential new footings. Due to the disruption to the First Floor spaces caused by Option 2, the Base has elected to proceed with Option 1.

5. Environmental Requirements

The South Carolina Department of Health and Environmental Control (DHEC) Bureau of Air Quality (BAQ) issues permits limiting the amount of regulated air contaminants emitted at a facility. The BAQ issues construction permits, operating permits, general permits and registration permits.

A construction permit is an air permit required for any person who plans to construct, alter, or add to a source of air pollution, including the installation of any air pollution control device. The construction permit must be issued before any construction-related activities occur at the site. The construction permit allows for construction and start of operation of equipment.

Once construction has been completed, a facility must request an operating permit to operate. The operating permit contains all the specific recordkeeping and reporting requirements, emissions limitations and compliance status, and conditions necessary as mandated in state and federal air pollution control regulations.

General permits cover a large number of facilities that have similar operations, and limit their air emission below the "major" threshold for the Title V program.

Registration permits are issued to sources where equipment similarities and simplicity remove the need for in-depth site-specific review. Additionally, these permits contain the same emission limits and monitoring requirements as the construction and operating permit for that source category.

There are several kinds of construction permit exemptions available, source- specific exemptions and emission-level exemptions. No construction permits shall be required for the sources listed in S.C.

Regulation 61-62.1, Section II (B)(1)(a) through (c) (pdf) which burn virgin fuel and which were constructed prior to February 11, 1971 and which are not located at a facility that meets the definition of a major source as defined in S.C. Regulation 61-62.70.2(r) (pdf); however, modifications at these facilities may trigger the requirement to obtain a construction permit. No construction permits shall be required for the sources listed in S.C. Regulation 61-62.1, Section II (B)(2)(a) through (h) (pdf), unless otherwise specified by S.C.Regulation 61-62.70 (pdf) or any other State or Federal requirement.

Paragraph “b” of S.C. Regulation 61-62.1, Section II (B)(2) lists boilers and space heaters of less than 10 million BTU/hr rated input capacity which burn only virgin gas fuels as being except from the construction permit requirement. The existing boiler which will be replaced under this project have an input capacity less than 10 million BTU/hr, therefore, boiler replacement included in this project will not require an air permit to construct.

Paragraph “c” of S.C. Regulation 61-62.1, Section II (B)(2) lists comfort air-conditioning or ventilation systems as being except from the construction permit requirement, therefore, replacement air conditioning units with gas fired heating furnaces will not require an air permit to construct.

6. SCHEDULE

i. The vendor shall schedule work in a manner that causes the least amount of interference during the normal occurrence of government business. The vendor shall establish a performance schedule to be approved by the assigned Contracting Officer Representative (COR). The vendor will work to perform tasks during normal working hours, Monday through Friday 0730-1700 hrs.

ii. Contract duration for this work shall be 180 days.

iii. The technical point of contact is Benjamin Douglass at (803)-647-8606 or Benjamin.J.Douglass2.mil@mail.mil.

7. ADDITIONAL GENERAL REQUIREMENTS

7.1. The contractor shall adhere to the following requirements as part of this Statement of Work.

7.2. Verification of Details: The Contractor shall become familiar with details of work in the field and shall advise the Contracting Officer Representative (COR) of any discrepancy prior to performing any tasks. The Contractor shall acknowledge that he has investigated and satisfied himself/herself as to all of the conditions affecting the work and requirements outlined in the specifications. Any failure by the Contractor to fully understand the contract requirements shall not relieve him/her from the responsibility for performing the required work.

7.3. Omissions from the design drawings or specifications detailing the work necessary to carry out the intent of this SOW or which are customarily performed, shall not relieve the contractor from performing such omitted details of work. Notwithstanding the foregoing, the Contractor shall not be responsible for conditions which are concealed from sight, because they are below ground or concealed within building structures such as concrete or masonry walls and floors, provided Contracting Officer (KO) or COR does not notify the Contractor of such. In the event that such conditions are encountered, the KO and the Contractor shall negotiate an equitable solution to the problem.

7.4. The Contractor is responsible for ensuring that any sub-contractors are aware of the job requirements for their respective bid areas stated in SOW.

7.5. SAFETY:

i. The Contractor and all of their personnel shall adhere to the latest edition of the American National Standard Institute (ANSI) - National Electrical Safety Code (NESC), OSHA Standards, and local fire and safety regulations. The COR reserves the right to inspect the Contractor's work at any time to assure compliance with aforementioned documents and specific safety procedures stated herein.

ii. Should the Contractor violate any safety procedures or requirements, the Contracting Officer (KO) reserves the right to issue a stop work order.

iii. The stop work order shall remain in effect until such time as the Contractor has resolved the violation. Responsibility for the stop work order shall rest solely with the Contractor with no cost or schedule impact to the Government.

7.6. PROTECTION OF PERSONS AND PROPERTY:

i. The Contractor shall be responsible for the enforcement of all safety requirements including, but not limited to, use of hard hats, safety glasses, safety belts, tool tethers while working overhead, safety cones, and preventing personnel from working overhead while others are working underneath. The Contractor shall provide protection of persons and property throughout the progress of work.

ii. The Contractor shall provide the necessary safety equipment, barricades and signs to protect personnel and property, of their own, their employees, subcontractor employees, and South Carolina Air National Guard (SCANG) employees.

iii. The integrity of the base’s security measures will be maintained by the Contractor at all times. The Contractor shall at no time leave the jobsite without securing the work area with traffic controls, erosion controls and any safety fencing necessary to protect the jobsite and base personnel. Access by the base personnel to secured areas must also be controlled and maintained by the Contractor.

iv. Permits: The Contractor shall be responsible to obtain all necessary state and local licenses and permits for the Contractor's work.

7.7. HOUSEKEEPING:

i. In the performance of work under this SOW, the Contractor shall make every reasonable effort to protect property from damage, and shall restore all such property subject to construction work to conditions substantially the same as when work began.

ii. The Contractor shall be responsible for daily cleanup and removal (within Contractor's work areas) of all non-salvageable materials and debris resulting from the execution of this SOW and any Change Order. The Contractor shall be responsible for removal of same from the site. All salvageable materials not used or not yet installed shall be properly secured.

7.8. DELIVERABLE ITEMS:

i. The deliverable items are those specified as part of this SOW, any Change Orders, associated attachments, documents and drawings. They may include design, material acquisition and supply, associated construction and installation labor, project management and documentation.

ii. The Contractor shall supply all labor and materials as specified in this SOW. Revised material quantities resulting from changes in the scope of work shall be supplied in writing prior to the start of construction.

7.9. LOCATION OF WORK SITE

Project Location: McEntire JNGB, Eastover, South Carolina.

Owner: South Carolina Air National Guard Address: 1325 South Carolina Rd., Eastover, SC 29044

The most current Davis Bacon Act (DBA) Wage Decision is applicable to this project. A copy of the wage decision can be obtained from https://beta.sam.gov.

7.10. CONTRACTOR USE OF PREMISES:

i. General: Contractor shall have full use of premises for construction operations, including use of Project site, during construction period. The Contractor's use of premises is limited only by Owner's right to perform work or to retain other contractors on portions of Project.

ii. Confine operations to areas within the designated contract limits. Do not disturb portions of the site beyond the areas in which the Work is indicated.

iii. The Contractor must be aware of the unique circumstances and interaction requirements necessary to do work within an active airport environment.

iv. Access to the Site: The Contractor’s access points to the site shall be permitted as directed by the Contracting Officer’s Representative (COR). The Contractor shall be responsible for all construction vehicles and personnel who enter at these designated points.

7.11. TOUR OF JOB SITE:

Inspection of site may be scheduled by submitting request to the Base Contracting Office, between 0800 – 1500 hours, Tuesday through Friday. Submit all requests to 2d Lt Timothy Ogburn in writing to timothy.j.ogburn.mil@mail.mil for coordination with the Contracting Officer. All references to the “Contracting Officer” should read “Contracting Officer or his designated representative”. All references to the “Owner” should read “Contracting Officer Representative (COR)”.

7.12. SOW/SPECIFICATIONS:

i. One copy of the Statement of Work and/or specifications will be provided in electronic format from the Contracting Office at the South Carolina Air National Guard, Eastover SC 29044 (Tel: 803-647-8255).

ii. Submission of a bid by the contractor shall be accepted as prima-facie evidence that he has examined the Statement of Work and has satisfied himself as to the nature and location of the work and all matters, which can in anyway affect the work or cost thereof under this contract. Any failure of the Contractor to acquaint himself with all available information, including a physical survey of the site of the proposed work, will not relieve him from successfully performing all the work required to be done for a complete, finished job.

iii. The above brief outline of principle features of the work in no way limits the responsibility of the Contractor to perform all work and furnish all plant, labor and materials required by any part of this statement of work, specifications and/or plans referred to herein.

iv. Bids received for this project will be evaluated based upon thorough and complete proposals received from the contractor. The Contractor’s proposal must include suggested sources of products conforming to the project’s plans and specifications. These products shall include but not limited to the chiller, insulation materials, and other associated equipment.

7.13. COMPLIANCE:

i. All materials/supplies and work related to this project will meet the latest adopted codes, regulations, ordinances and directives applying to that particular type of work. All applicable OSHA and Fire Protection regulations will be observed and practiced at all times.

ii. All work requiring certification or inspection by outside agencies will be accomplished and the documented results will be provided to the COR. The COR will be notified of any testing/inspection/certification to be accomplished, date, time, agency involved and purpose will be conveyed to the COR, so arrangements can be made for observation.

iii. Any burning/welding/soldering will require a Burn permit coordinated/issued daily by the Base Fire Department located at Building 2900. The COR can help the Contractor coordinate with the Base Fire Department, but the contractor must initiate the request. The request for the Burn Permit must be initiated (3) three days prior to work commencement. The Contractor may not proceed with burning operations until the Burn Permit has cleared.

iv. The work site will be cleaned daily and kept free of debris and hazards. The Contractor must limit the use of the work site to only the designated areas as briefed to the Contractor by the COR.

7.14. SUBMITTALS:

i. All submittals are due ten (10) days after the Notice to Proceed has been issued or as stipulated by the Contracting Officer.

ii. All equipment and or materials to be used will require approval by The Contracting Officer Representative prior to use or installation. Work will not start until the COR approves the materials. All material submittals must be submitted on an Air Force Form 3000 (two copies) and accompanied with material cuts and product specifications.