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PROJECT NUMBER 13260011

SCOPE OF WORK (REVISED)

REPLACE HVAC SYSTEMS, 21 BUILDINGS, 13300 BLOCK

LAND DOMINANCE CENTER, FORT STEWART, GA

1. Description of Work: Provide all plant, materials, labor, equipment and perform all operations required to remove and replace the existing HVAC Systems (condensers, air handlers and natural gas furnaces) with new within 19 Barrack Buildings (13317, 13318, 13319, 13320, 13321, 13322, 13323, 13324, 13325, 13326, 13327, 13328, 13329, 13330, 13331, 13343, 13344, 13346 & 13347) and 2 Latrine Buildings (13306 & 13308); replace the existing deteriorated wooden plenum box with new insulated metal plenum box (within the 19 Barrack Mechanical Rooms Only); install drywall on existing wood joints ceiling and exterior wood wall build-up and vertical rear wall within the Mechanical Room (within the 19 Barrack Mechanical Rooms Only); replace old electrical disconnects with new (all 21 Buildings); replace the existing fire alarm batteries within the Fire Alarm Control Panel and re-program the exist FACP’s (within the 19 Barrack Mechanical Rooms Only) and replace all the existing return air filters and outside air filters within all the 21 Buildings in this project. The is no ACM materials to be encountered during subject construction. Work shall include but not be limited to the following:

a. Demolition Work: (19 Barrack Buildings)

(1) Remove the associated existing ductwork (supply and return air ductwork), as needed to accomplish removal of the existing air handlers and natural gas furnaces AND to access rear wall to accomplish framing and construction of 5/8” Type “X” drywall on the rear wall of the Mechanical Room of subject building. Existing ductwork removed, may be reused and re-insulated with new 3” foil back ductwrap (with the exception of the flexible supply transition collar at the top of the supply ductwork, which shall be replaced with new, matching the existing and sized to fit the new equipment).

(2) Remove the existing air handlers, natural gas furnaces, condenser, pump-down units and prepare for disposal.

(3) Remove and dispose of existing line-sets, refrigeration insulation and condensate drain lines and provide new with new equipment.

(4) Shut-off Natural Gas, purge lines and disconnect from existing furnace units. Existing black iron natural gas piping may be reused, up to gas valve cut-off at each unit. New flex shall be provided from cut-off to each new furnace unit.

(5) Remove the existing electrical disconnects and conductors (that power outside condensers) and replace with new disconnects (breaker-type disconnects in NEMA 3R Enclosure), new liquid flex conduit and ne conductors to outside units. Size conductors to comply with manufacturer’s recommendation for new units.

(6) Remove the existing deteriorated wooden plenum box (supporting the two units and return air supply) and replace with new insulated aluminum plenum box.

(7) Remove the existing thermostat located within the Mechanical Room and replace with new. Replace the low-voltage control wiring to units and liquid flex and replace with new, of the same size.

b. Demolition Work: (2 Latrine Buildings)

(1) Remove the existing air handlers, natural gas furnaces, condensers on 2 Each 5 Ton Units within subject buildings.

(2) Remove and dispose of existing line-sets and refrigeration piping insulation on all three units. Existing condensate piping may remain and be reused.

(3) New natural gas cut-off valve and new flex shall be provided to each of the three furnace systems from valve to unit.

(4) Remove the existing thermostat located within the Mechanical Rooms and replace with new.

(5) Reuse existing furnace and outside air vents.

(6) Remove the existing electrical disconnects and conductors (that power outside condensers) and replace with new disconnects (breaker-type disconnects in NEMA 3R Enclosure), new liquid flex conduit and ne conductors to outside units. Size conductors to comply with manufacturer’s recommendation for new units.

(7) Reuse existing metal plenum boxes at both latrine buildings.

c. New Work: (19 Barrack Buildings)

(1) Provide and install two each new 5 Ton condenser units, air-handling units and natural gas furnaces to replace the existing units serving subject building(s). HVAC equipment shall be installed according to the manufacturer’s requirements. Natural gas furnaces shall have 120,000 BTUH input with standard 80% efficiency. New HVAC equipment shall be set up for twinning together, similar to the existing equipment set up/operation. Provide new units with pre-charged freon. Equipment submittal is required.

(2) Provide and install new line-sets, supports, unicellular insulation for new refrigeration equipment. Supports provided shall be over-sized schedule 40 PVC, secured to supports, to eliminate insulation compression.

Insulation exposed to UV (or installed on exterior) shall be protected with a Type II coating (to eliminate UV deterioration). Unicellular insulation shall have 1” wall thickness.

(3) Provide and install new flexible natural gas lines from the existing unit gas valve to the furnace connection. The contractor shall confirm the sizing of the existing gas regulator (to each new furnace unit) and re-size if necessary to comply with manufacturer’s recommendations.

(4) Provide and install 16 gauge metal stud framing for the rear wall of the mechanical room (installed as 16” o.c. or as near as possible), to support new drywall installation. Frame as necessary the existing rafter, above the vertical rear wall, to support the new metal frames wall (at the top) and rest the new wall on the bottom, flush with the existing treated wood nailer. Allow framing to support the re-installation of the ductwork and passage thereof thru the newly constructed framing.

(5) Provide and install new 5/8” Type X drywall to the mechanical room ceiling, vertical wood wall above the CMU construction (from treated wood nailer to underside of the rafter) and to the newly constructed new wall on the rear of the mechanical room. Gypsum installation shall comply with Gypsum Drywall Handbook. Finish shall have all joints taped and mudded with two applications and left unpainted. Items on the existing wood surface of the rafters and vertical wood walls shall be relocated to the new gypsum surface. Penetrations thru the new drywall surface shall be sealed with safeing insulation or flame resistant foam.

(6) Provide and install new dryers and sight glasses on the new unit installation adjacent to the condenser units.

(7) All existing black iron natural gas piping shall be reused.

(8) Provide and install new 3” thick foil wrap insulation over the existing (and reused) ductwork. Insulation shall be installed per SMACNA requirements with joints stapled and seams taped. The ductwork and/or insulation shall be sealed to the new plenum box and new air handlers, to achieve an air-tight installation.

(9) Provide and install new flexible ductwork connection collar between air-handlers and the existing transition supply ductwork (top of twinned units).

(10) Provide and install new schedule 40 PVC condensate drain piping to support the two new air-handlers. New condensate piping shall be routed similar to the existing condensate drain piping and supported.

(11) Provide and install/reseal the existing thru-wall sleeve penetrations with expansion foam following installation of new lines.

(12) Provide and construct new insulated aluminum plenum box under the new units, of the size shown on the drawings, with attachments as indicated and sealed to eliminate air infiltration. Field welding of the aluminum frame will be necessary to complete the installation. .080” thick, mill finished aluminum shall be used in the construction of the top and front of the new plenum box, with cut edges filed to achieve and smooth finish and edges. Supports within the aluminum plenum box may vary slightly, depending on the new unit sizes, and to achieve adequate support of the individual units. Fabricator shall consult the mechanical sub-contractor for exact placement of supports, prior to welding and cut-out sizes that match the new units being installed.

(13) Provide and install new electrical disconnects, liquid flex and conductors (from disconnect to new condenser units). New disconnects shall be similar to the existing in size and type. New conductors shall comply with manufacturer’s recommendations for the new units. Liquid flex shall incorporate all fittings and connections and be installed in a neat/professional manner.

(14) Provide and install new thermostat in the location of the existing thermostat and connected to the existing interior temperature room sensor.

(15) Provide and install new return air filters and outside air filters within building and mechanical room with same size as existing.

(16) Provide two new batteries for each fire alarm control panel. Complete 48 hour battery testing of systems. Reprogram the existing Fire Alarm Control Panel to interface with relocated or new devices. Coordinate with 911 Center for proper operation of panel and Fire Department for final systems check/inspection.

d. New Work: (2 Latrines – Buildings 13306 & 13308)

(1) Provide and install two each new 5 Ton condensers, air-handling units and natural gas furnaces to replace the existing units serving subject building(s). HVAC equipment shall be installed according to the manufacturer’s requirements. Natural gas furnaces shall have 120,000 BTUH input with standard 80% efficiency. New HVAC equipment shall be set up for twinning together, similar to the existing equipment set up/operation. Provide new units with pre-charged freon. Equipment submittal is required.

(2) Provide and install new line-sets, support, and unicellular insulation for new refrigeration equipment. Supports provided shall be over-sized schedule 40 PVC, secured to supports, to eliminate insulation compression. Insulation exposed to UV (or installed on exterior) shall be protected with a Type II coating (to eliminate UV deterioration).

Unicellular insulation shall have 1” wall thickness.

(3) Provide and install new flexible natural gas lines from the existing unit gas valve to the furnace connection. The contractor shall confirm the sizing of the existing gas regulator (to each new furnace unit) and re-size if necessary to comply with manufacturer’s recommendations.

(4) Provide and install new sight glasses, filter dryers, thermostat wiring, and refrigerant charge for proper operation of new units.

(5) Reconnect and reuse the existing furnace vents to the newly installed units. Plenum boxes to remain and be reused. Seal new units to top of existing plenum box and stand.

(6) Seal thru-wall pipe sleeve with expansion foam on all units.

(7) Reuse existing condensate drain piping.

(8) Replace existing return air AC filters with new of the same size as existing within each building.

(9) Provide and install new thermostat in the location of the existing thermostat (Buildings 13306 & 13308 has two thermostats) and connected to the existing interior temperature room sensor.

(10) Provide and install new electrical disconnects, liquid flex and conductors (from disconnect to new condenser units). New disconnects shall be similar to the existing in size and type. New conductors shall comply with manufacturer’s recommendations for the new units. Liquid flex shall incorporate all fittings and connections and be installed in a neat/professional manner. 13306 & 13308 has two each for the two condenser units. Building 13310 receives no work under this project.

2. Execution of Work: The contractor shall coordinate the performance of all work 5 working days in advance. The contractor shall be responsible for protection of adjacent surfaces and areas not to receive work. The contractor may only work on a maximum of three buildings concurrently. All work under this project shall be complete within 130 calendar days after the proceed notification. The contractor will be responsible for providing and furnishing all lifts, scaffolding, elevated platforms, ladders, etc., needed to perform the work and access all areas of the project. The contractor shall be responsible for the protection of the building contents from water damage (due to rainfall) during the performance of this work. Any damage to government property (as a result of this project) shall be repaired or items replaced by the contractor, at no cost to the government.

3. Disposal of Materials: The contractor shall be responsible for disposal of all materials off of government property (unless noted below for return to the government).

4. Items to be Returned to the Government: Items removed from the work shall become the property of the contractor and disposed of off of government property.

5. Coordination of On-Site Work: The contractor shall provide to the POC a progress schedule for approval. Subject progress schedule shall show the various work trades incorporated within the work, their staging and completion dates.

6. Clean-up: The contractor shall keep worksite clear of debris and/or material during the work and shall accomplish clean-up of the worksite at the end of each day. Materials removed or demolished shall not be allowed to accumulate on the job-site. Any items damaged (by the contractor) during performance of the work shall be restored to original condition by the contractor and at no cost to the government.

7. Standard of Workmanship: The contractor shall perform all work in accordance with mechanical industry standards, manufacturers’ recommendations, International Building Code, SMACNA and National Electrical Code.

a. Heating and Ventilation Equipment, Mini-Split Systems and Associated Piping: The contractor shall provide and install two new each 5 Ton HVAC Systems within the Mechanical Room of subject buildings. 5 Ton Units shall be 14 SEER or higher with air-handlers and 80% AFUE natural gas furnaces. Units shall be complete and operational with all ductwork reconnected/re-insulated, electrical, line-sets, interfaced with the existing fire alarm system and controls, functionally tested (for proper operation) and pass Fire Department Testing. Subject equipment (air handlers) will be housed within Mechanical Rooms indicated on drawings. All new air handlers shall be equipped with condensate float switches. The condenser units will be positioned adjacent to the mechanical rooms and located on the existing concrete equipment slabs as indicated.

Units shall operate and be charged with R-454A Refrigerant (Carrier or Grand-Aire or approved equal is the suggested source). Air-Handlers shall be positioned on a new aluminum insulated plenum box and on existing plenum boxes for the remaining buildings). The existing ductwork (supply and return) shall be reused and re-insulated with 3” foil back insulation, stapled, taped and sealed to the new aluminum plenum box as well as the existing (remaining) insulation (for Barrack Buildings). Ductwork connections to new units and/or reconnections shall be screwed, taped and covered with mastic, prior to reinsulating. Repair and/or retape existing ductwork to new units to create a positive seal of the air distribution system. The contractor shall provide a new flexible duct connector at the supply duct transition (for Barrack Buildings). Outside Condensing Units shall be positioned as near as possible to the location of the existing outside units. The installation of the outside units shall be symmetrical placed to achieve a neat installation and shall incorporate a minimum number of elbows/fittings and securely strapped to the concrete pad with unistruit and oversized Schedule 40 PVC sleeves (to eliminate compression of insulation). Outside air filters shall be changed and replaced following new unit installation, as well as inside return air conditioner filters, on all buildings. The contractor shall provide and install new refrigerant tubing, insulation, filter dryers, sight glasses and accessories as necessary as indicated and required by the drawings and this work scope. New disconnects, thermostat and condensate piping shall be provided for all buildings (condensate piping for Latrine Buildings may be reused.

Condensation drain line (3/4” dia. Sch. 40 PVC w/trap at unit) shall be piped and installed with slope to drain units and as indicated on drawings. All interior piping shall be configured in such a manner to allow for maintenance and routine servicing of the units/components (without disassembly/re-wiring of units). The new refrigerant piping shall extend from inside to outside condensing unit and shall include unicellular insulation with exterior coated with Type II coating on armaflex that is exposed (to protect against UV deterioration). Insulation shall be continuous thru supports and penetrations, 1” exterior wall thickness. The existing thru wall sleeves shall be re-insulated/sealed with expansion foam after the new piping installation. Hangers/pipe supports shall be incorporated (as needed) within the mechanical room to support refrigerant tubing and condensate drain piping. Piping shall not rest on suspended ceiling or wood truss members that would allow insulation to be compressed. Unicellular Insulation shall have sections glued and secured with adhesive recommended by the insulation manufacturer. The refrigerant piping shall include liquid line driers, sight glasses, and piping supports for supporting piping. All piping installation shall follow refrigerant techniques and trade practices and be installed neatly to achieve as acceptable appearance. Refer to manufacturer’s design manual for refrigerant piping size, details and equipment installation. The natural gas regulator and associated piping for the natural gas furnace shall be sized to accommodate the furnaces and as recommended by the manufacturer. Natural gas piping shall be reused with new flexible gas line connection from the gas cut off to the furnace. Thermostat wiring shall be run in emt on interior and with ½” liquid flex on the exterior. New thermostat wiring and sealtite shall be installed to all units. Equipment shall be positioned to allow for future servicing of equipment and components. Refrigeration tubing shall be hard drawn and marked ACR.

All penetrations thru exterior wall shall be sleeved (with Sch 40 PVC) and sealed with expansion foam (outside of sleeve shall be sealed with silicone sealant. The contractor shall adequately support piping and tubing with straps and unistruits. The contractor shall submit for approval of the government all HVAC equipment to be incorporated (Condensers/Air Handlers/Furnaces and supporting electrical disconnects/devices) prior to ordering of materials. (S)

b. Programmable Thermostat: The contractor shall provide and install a seven-day programmable thermostat, within Mechanical Room, in the location indicated on the drawings and connected to and be compatible with the existing interior room sensor.

Thermostats shall be similar to Venstar Model 2900 (or compatible with the system and have similar capabilities as the one above). Thermostats shall be two stage cooling, programmable automatic change over and connected to the existing building/room sensor. Thermostat wiring shall be run in the existing interior EMT raceway and in sealtite flexible conduit on the exterior with new thermostat wiring to the new units.

Thermostats shall be programmed (with set-points) as directed and programmed as directed by the LDC POC. (S)

c. Disconnects: Provide and Install new electrical disconnects to replace the existing (Typical 2 each buildings). Replacement shall incorporate new conductor from the disconnect to the new heat pump unit, sized per the NEC and as recommended by the heat pump manufacturer. New Sealtite liquid flex shall be provided from the disconnect to the new heat pump units, complete with all connectors and fittings. The new disconnects shall be installed in the same location as existing ones and of the same type/style/ampacity. (S)

d. Aluminum Insulated Plenum Box (Barrack Buildings): Provide and install a new aluminum insulted plenum box within the Mechanical Room of subject facility. The framing and supports of the aluminum box shall be of angle aluminum 2” x 2” x 1/8” and aluminum flat stock of 2” x 1/8”. See drawings for details and sizes. Field welding of connections shall be required with joints mitered and welded and attached to CMU and concrete floor with tapcon fasteners (1/4” x 1 ¼”). The top and front of the new plenum box shall be constructed of .080” thick mill finished aluminum, attached to the aluminum frame with self-tapping screws. Cut-outs within the top of the aluminum box shall interface with the physical sizes of the new equipment and the existing return air ductwork. Support locations may vary slightly with the physical unit sizes and final positioning of the ne units on the plenum box. The inside of the top and front aluminum box shall be covered with 1” ductliner, applied with a spray adhesive (recommended by SMACNA and as used in the industry to secure insulation material to metal). A full bead of silicone caulk shall be applied on top of the aluminum angle supports and between the aluminum angle and CMU/Concrete, prior to installation of the aluminum top and front, to achieve an air-tight installation. Ductwork and Furnace Units shall be sealed to the aluminum plenum box with foil back tape. See drawings for details and sizes.

e. Drywall (Barrack Building Mechanical Rooms): Provide and install 5/8”, Type “X” drywall to the ceilings and vertical wood portion of the Mechanical Room Walls (on three sides – approx. 2’-10” high) and construct and install 5/8” Type X drywall on the rear wall of the Mechanical Room. Framing (with 16 gauge metal studs, installed at approx. 16” o.c.) will be required from the underside of the wood rafters (joist chord) to the top of the existing nailer. Ductwork (both supply and return air) will require removal/reinstallation/re-insulation in order to access the rear area to be framed. Framing shall provide opening to re-route the ductwork once the drywall material has been installed. The ductwork will then be reinstalled and re-insulated with 3” foil back duct insulation. Items attached to the existing wood framing (ceiling and/or walls) shall be reattached and moved to the new drywall surface. Finish shall be with tape and mastic, two coats, and sanding between and left unpainted.

f. Furnace Vents: Existing furnace vents shall be reused.

8. Safety: All work shall be accomplished in strict compliance with OSHA Safety Standards. The contractor shall incorporate the use of safety in the use of all ladders, scaffolds and lifts to include workers using lifts being tied-off with full body harnesses during work execution.

9. Superintendency by the Contractor: Contractor shall provide an onsite Superintendent during progress and until the final certificate has been executed by the Owner or Architect. The Superintendent must be a competent superintendent and any necessary assistants, must all be satisfactory to the Owner or Architect. The superintendent shall not be changed except with the consent of the Owner or Architect unless the superintendent proves to be unsatisfactory to the Contractor and ceases to be in his employ. The superintendent shall represent the Contractor in his absence, and all directions given to the superintendent shall be binding as if given to the Contractor.

10. Supervision by the Contractor: The Contractor shall supervise and direct the Work, using his best skill and attention and he shall be solely responsible for all construction means methods, techniques and sequences.

11. Operating and Maintenance Manuals: The contractor shall, at the conclusion of the work and following provide Operating and Maintenance (O&M) Manuals in four copies of all mechanical and electrical systems provided and installed into subject construction. Manuals shall include an index outlining the contents of material and sub-sections covering each respective piece of equipment. HVAC Systems shall be listed within the O&M Manual that reflect the make, building number, serial number, model number and installation date for each of the air-handlers, furnaces and condensers incorporated into the work. Sub-sections shall include the model number and make of the equipment, recommended maintenance schedule and frequency of maintenance required to include descriptive data, warranties and/or extended warranties, the sub-contractor that performed the installation of the respective equipment and a component listing (by parts numbers) for replacement parts. O&M Manuals shall be submitted in a hard binder with the project name, contract number and successful contractors name and address. O&M Manuals shall submitted for government approval. (S)

12. Submittals: The contractor shall utilize ENG Form 4025 dated Mar 1995 in the submission of all items for submittal approval. Submittals shall be provided in original and three copies (unless otherwise stated). Submittals shall be made in complete descriptive data to ensure compliance with the specification and/or drawing requirements. Items shall be submitted in groups in order to finalize a complete review of data (i.e., HVAC submittals shall include submissions for ductwork and mastic, etc.) in order to complete a complete review of all systems required. Information containing cut-sheets shall be have the specific item requiring approval

“highlighted” on all copies. Each submittal shall be signed by the contractor attesting that the information being submitted has been researched and complies with the contract requirements.

Items that do not comply with the contract requirements should be marked as a “variation”.

Submittals should be numbered in sequence by the last numeric caption of the contract number followed by a dash and the number assigned. For example, a contract number of DOD-1311001 would have as submittal 1 the following transmittal number 1311001-01. If a re-submittal is made for an item the original transmittal number should be noted in the resubmittal block (i.e., this is a resubmittal of transmittal 1311001-01, or the original transmittal). Submittals may either be hand-delivered to mailed to Land Dominance Center, Building No. 10504, E 12th Street & Troupe Ave, Fort Stewart, GA 31313. Operation & Maintenance Manuals shall be submitted in ring-binder format with index and sub-section identifying each tab or sub-section. The following items identified within this section require submission for approval as noted:

a. Condensers, air-handlers and furnaces – Descriptive Data/Catalog Cut that indicate compliance with the specification requirements.

b. Disconnects – Descriptive Data/Catalog Cuts that indicate compliance with the specification requirements.

c. Programmable Thermostats – Descriptive Data that indicate compliance with the specification requirements.

d. O&M Manuals – Para 11 requirements

13. Standard of Quality/Workmanship: Work shall be accomplished to industry standards, SMACNA Standards, National Electrical Code, International Building Code, National Plumbing Code and by skilled tradesmen.

14. Work Hours: The contractor shall execute subject project between the hours of 7:30 a.m.and 4:00 p.m. each weekly work day (Monday thru Friday) excluding state recognized holidays.

15. Warranty: The contractor shall provide the customer a 1-year warranty for materials and workmanship at the acceptance of the work. New HVAC System Condensers shall carry a 5-year warranty on compressors.

16. Point of Contact: The GGTC Point-of-Contact for the above project is Mr. Michael Hall, phone number (678) 569-9267.

17. Drawings: 11 Drawing sheets accompany this project, including cover. Drawing sheet sized are 17” x 22” with scale as indicated. The contractor is responsible for verification of all conditions and measurements prior to submission of his bid for this project.