25R0001_Atch11B_FOPR_GJKZ1149058-Atch2-SOW20DEC2024.pdf

STATEMENT OF WORK

FOR

REPLACE DORMITORY BOILERS, MULTI

(DORMITORIES 2256, 2257, 2258, 2259)

AT

FAIRCHILD AIR FORCE BASE, WASHINGTON

Project No.: GJKZ1149058

20 December 2024

1. PROPOSAL

This Task Order is directed by Work Element No. 1 (Design-Build Effort Required with Provided Partial Design) as specified in the MACC Specification, General Contract Requirements, Section 01000, Paragraph 1.1. This Statement of Work (SOW) defines the scope for this task order to include two (2) components:

1.1. CLIN 0001AA: Buildings 2256, 2257, 2258, 2259 – Replace the existing heating hot water boiler systems and domestic hot water systems including, but not limited to:

Heating hot water boilers, domestic hot water boilers and domestic hot water heaters, domestic hot water storage tanks, domestic hot water thermostatic mixing valves, heating water piping, domestic water piping, associated insulation, associated flues and air intake piping, domestic hot water recirculation pumps; remove abandoned steam piping. Replace existing natural gas piping and gas meter serving heating water system and upsize to accommodate new gas load with new boilers. Conduct Hazardous Materials Survey. Install new heating hot water boilers, domestic hot water boilers, new supply and return heating water piping, new domestic water piping, domestic water storage tanks, thermostatic mixing valves, domestic hot water recirculation pumps, EMCS controls for new and modified systems. Install new electrical panels.

Extend existing concrete housekeeping pads to accommodate new equipment.

Multiple mobilizations / demobilizations. All cleaning, preparation, and disposal

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Attachment 2 - Statement of Work necessary to accomplish said tasks; all required testing and start-up of equipment, all coordination necessary to accomplish said tasks; as-built records; General Requirements associated with the above listed work to meet the requirements of this Statement of Work.

1.2. CLIN 0002AA: Buildings 2256, 2257, 2258, 2259 – Abatement of ACM present in equipment insulation, piping insulation, piping gaskets. All cleaning, preparation, and disposal necessary to accomplish said tasks; all coordination necessary to accomplish said tasks; General Requirements associated with the above listed work to meet the requirements of this Statement of Work.

Each Contract Line Item Number (CLIN) component shall be priced to include all items of work described in the general work descriptions. In addition to the Price Schedule, the contractors shall provide a Schedule of Values (SoV) along with their price proposal. The SoV shall be broken down per the current MasterSpec version format: by Division, and subsequently, by Section. Each Section Item should include the Section Number, Section Title and Scheduled Value.

Supporting information is listed as Attachments A through F at the end of this document.

Government furnished information/materials are not guaranteed to represent actual conditions and shall therefore be field verified prior to submission of proposals, and incorporation into the design.

Questions must be submitted to the Contracting Officer in writing.

2. PROJECT MANAGEMENT

The following is a summary of the project phases and respective management requirements.

2.1. Performance Period: The performance period shall not exceed the number of calendar days shown in the Fair Opportunity Proposal Request, and subsequent Task Order. The performance periods shall be broken down into three phases: Phase I – Design, Plans, and Material Submittal/Gathering; Phase II – Physical Construction; and Phase III – Closeout. A Notice to Proceed (NTP) will be issued for each performance period.

2.2. Phase I: Upon award of the task order, receipt of acceptable bonding, and Contractor’s Quality Control Plan; NTP for Phase I shall be issued. MACC Contractor shall submit work plans, material submittals, 35% interim Design, 65% Design, Hazardous Materials Survey, etc. The Contractor owns the burden of managing time and obtaining acceptance of all submittals. The contractor shall allow 14 days for Government review of each submittal. Ensure submittals are provided to the Government in a timely manner allowing adequate time for Government review, approval and if necessary, resubmittal.

2.2.1. After each Design submittal, the Contractor shall schedule a meeting to review and resolve Government review comments. The Design submittal, Government review, review meeting, and approval must occur within the Phase I Performance Period. The review meeting shall be scheduled no more than 21 calendar days from the date in which the Government receives the submittal.

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2.2.2. The Contractor shall be required to complete the material submittal process and obtain Government acceptance of all submittals prior to the completion of Phase I. The Contractor shall realize that some submittals may not be able to be reviewed without acceptance of the Design, as the submittals must match the Design. The Contractor is responsible for allowing time for this during the Phase I Performance Period.

2.3. Phase II: NTP to Phase II shall be issued upon acceptance of Phase I.

2.3.1. Planned disruptions of gas, electric, or other utilities must be coordinated with the Construction Manager a minimum of 7 days in advance of work.

2.3.2. Winter Exclusion IS NOT applicable to this project.

2.3.3. The Government will determine prior to the end of Phase II, after a joint Contractor/Government inspection of the punch list items, whether Phase II is Substantially Complete. This will occur for each dormitory building (see Section 2.3.4).

2.3.4. NOTE: The work in each building (B2256, B2257, B2258, B2259) must be accepted by the government prior to starting work in another building. Only one dormitory building at a time will be vacated and must be occupiable prior to beginning work in the next building. The contractor shall include in their bid three

(3) mobilizations / de-mobilizations. The period of performance (see Section 2.1) includes four (4) weeks between completion of construction work on one building and the beginning of construction work on the next building, for a total of twelve (12) weeks.

2.3.5. Buildings shall be worked on in the following order: B2256, B2258, B2257, B2259.

2.4. Phase III: NTP for Phase III shall be issued upon acceptance of Phase II. Per the contract specifications, the requirements for Closeout Procedures shall be managed by the contractor throughout the total contract performance period. The contractor shall finalize all requirements, allow for government review, and receive Contracting Officer approval of the receivables. The NTP for Phase III shall identify the due date for completion of the Closeout requirements. As-built drawings (including AutoCAD) and O&Ms are required.

2.5. Quality Control: The contractor shall refer to and follow the MACC General Contract Requirements Section 01700 – Contractors Quality Control. A separate Superintendent and Quality Control (QC) SHALL NOT be required for this project. The QC shall follow all Quality Control Sections found in the current Fairchild Base Design Guide (BDG) (Section 014510 – Quality Control).

2.6. Work Restrictions: The building WILL NOT be occupied during all phases of the project. Contractor may only work on one dormitory at a time – see Section 2.3.4 and Section 2.3.5. The following work restrictions shall apply:

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2.6.1. This project is in a Non-Restricted area.

2.6.1.1. Escorts WILL NOT be required.

2.6.1.2. An Entry Authorization List (EAL) WILL NOT be required for work in these facilities.

2.6.2. All contractor personnel present on Fairchild AFB for this project must be US Citizens.

2.6.3. Work hours will be restricted to 7:00 am to 4:30 pm, Monday through Friday, excluding Federal holidays. Extended hours are available upon request.

3. ENVIRONMENTAL

All applicable requirements of the BDG Section 013543 – Environmental Procedures shall be followed in the execution of this project.

3.1. Hazardous Materials Survey:

3.1.1. The Contractor shall perform a Limited Asbestos Survey in support of this project, prior to any physical work being performed. Existing Hazardous Materials Surveys for the project areas (mechanical rooms) do not exist.

3.1.1.1. Test only the materials and surfaces affected by the work under this contract. Repair areas where destructive testing is required, with weatherproof seals at exterior areas. If the building is occupied, all appropriate measures must be taken to protect occupants from exposure to hazardous materials because of testing. Advance notice of two days will be required for building access.

3.1.1.2. All painted surfaces affected by the construction of this project shall be assumed to contain lead and shall be treated as a regulated coating. Disposal of lead containing materials shall meet all Federal, State and Local laws.

Prior to any waste streams leaving Fairchild AFB the contractor shall have a TCLP analysis accomplished. Results of the TCLP will be submitted to the Government for review and acceptance.

3.2. Abatement (CLIN 0002AA): Estimated abatement quantities for bidding purposes are contained in this section. The quantities below reflect only ONE building (B2256) and the same effort shall be duplicated to B2257, B2258, and B2259.

3.2.1. An estimate for the quantity of ACM abatement shall be listed in CLIN 0002AA.

This work shall be performed in accordance with the FAFB BDG, MACC Specifications, and all current Federal, State and Local laws. Abatement of ACM, above and beyond the quantities listed below is not part of this Contract and will be treated as a differing site condition.

3.2.1.1. ACM quantities for estimating purposes (majority steam piping):

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Domestic Water Storage Tank Ins 100 SF Piping Gaskets 20 EA Piping Insulation 50 SF

3.3. Solid Waste: The Contractor shall submit a Solid Waste Disposal Plan and track waste generated by construction activities. Legally dispose of all debris and excess materials off base. Provide dump receipts and complete the Quarterly Solid Waste Disposal tracking worksheet in accordance with the FAFB Environmental Specification of the

BDG.

3.4. Hazardous and Universal Waste: For any project generating hazardous or universal waste, the contractor is responsible for identification, proper storage, management, and disposal of said waste. All Hazardous Waste manifests shall be signed by 92

CES/CEIE.

3.5. Liquid Waste from Industrial Operations: Liquid waste resulting from any construction operations SHALL NOT be discharged to the sanitary sewer unless prior approval has been given by the government. Liquid waste shall never be discharged to the storm drain system. The contractor shall be responsible to remove any liquid waste from the project site. Liquid waste shall be disposed of properly at an approved facility.

The contractor shall bear all costs associated with the testing, hauling, and disposing of such liquid waste.

3.6. Water System: After any water disruptions, outages, or maintenance that drops the water system below 20 PSI, water sampling shall be conducted. Water sampling shall include chlorine residual testing, pH, and a Bacteriological/E.coli sample. The Bacteriological/E.coli sample shall be tested by a Washington State certified laboratory. Negative results shall be submitted to the government within 24 hours, and an immediate notification shall be made for positive results.

3.7. Sustainable Procurement: Requirements for use of Recovered Materials are referenced in the BDG, Section A.3 (D). It is the responsibility of the Designer of Record to identify items that fall under all the SPP programs required for this project.

4. GENERAL WORK DESCRIPTION

The existing hot water boiler systems are past their useful lives and the existing domestic hot water systems and storage tanks are being replaced. Affected appurtenances specific to each system are described in the work descriptions. The available equipment space is being modified to allow access to all new boiler and domestic systems and abandoned steam piping is being removed to clean up the available mechanical space.

Activities specific to this project shall include but are not limited to:

4.1. Design: Develop a 65% Design, to include a 35% interim Design, from this Government Statement of Work and government provided 15% concept documents.

Refer to MACC Specifications General Contract Provisions Section 01300, for

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requirements as applicable to the scope of this task order. Provide existing site verification, Design (including demolition and new construction), Design Analysis, Calculations, Drawings and Specifications as required by this Statement of Work.

Pertinent information for design is included on Attachments B, C, D1, D2, E, and F.

4.1.1. Verify existing site conditions, including pathways (roads, entrance to MER, area wells, stairs, etc.) to and from project site, landscaped areas, sprinkler heads, obstructions, etc. Government Furnished Existing Drawings/Maps are not guaranteed to represent actual conditions and must be field verified prior to submission of bids, and incorporation into the Design. Provide drawings (plans, section views, piping diagrams, details, calculations, etc.) showing existing equipment layout, elements, and appurtenances that will be affected by the Statement of Work. Repair all existing site elements damaged because of destructive investigation.

4.1.2. Existing As-built drawings may be provided by the government if available and are For Information Only. They are intended to illustrate various recorded projects for the facility that might give information about the building, associated systems, and surrounding area of that facility. Government Furnished As-Builts are not guaranteed to represent actual conditions and do not meet current CAD standards.

4.1.3. All A/E/C CAD standards shall be met by 65% design. If all standards are not met the submittal will not be accepted and the designer will not be allowed to proceed to the next phase of design.

4.1.4. Contractor is responsible to understand the pertinent UFC and codes that govern this work including, but not limited to: FAFB BDG, Fire Codes, Electric Codes, Mechanical Codes, Plumbing Codes, UFC 3-401-01, UFC 3-420-01, UFC 3-520-

01, UFC 3-600-01.

4.2. Temporary Facilities: Provide temporary facilities in accordance with the Fairchild BDG Section 015000 –Temporary Facilities and Controls.

4.2.1. Contractor shall provide any temporary heating required to maintain interior building temperature at a minimum of 40°F.

The descriptions of the scope of work that follows represents only ONE building. There are FOUR (4) buildings that are part of the scope of work. These buildings are near identical in MER layout and scope. Deviations from the scope detailed below are noted on page 7. Because of the duplication of construction effort required, only B2256 has been detailed below and the same construction effort shall also apply to B2257, B2258, and B2259.

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NOTE:

Existing mechanical rooms (MER) are restrictive in space and pathways. Note critical dimensions below and recommended guidance. This shall be considered by the design team when selecting equipment and bidding this project. Design team MAY include in their bid the cost of removing the heating and ventilation unit (H&V) supply fan motor (see Attachment B, page 10) and re-installing it after all hydronic systems are installed. Design team is responsible to account for these pathway restrictions when providing bids based on their research and design of new systems and demo of existing systems.

- Existing MER door entry width is 34 inches with the door removed. Only single-width doors from the MER to the exterior are available and the construction path will pass through interior lobbies/vestibules.

- Existing pathway between H&V supply fan is 31 inches wide (fan motor) and 74 inches high (overhead piping) – see Attachment B, page 10. This is encountered immediately after entering the MER.

- MER area wells cannot be used as a pathway because of existing fan motors, ductwork, piping, Unistrut, glycol make-up tanks, water filters, and pumps, that block pathways.

- Removing existing equipment may require cutting equipment to allow for removal from MER. This is especially true for the existing domestic hot water storage tank.

CLIN0001AA: MER DEVIATIONS FROM B2256 DESCRIPTIONS

The demo and new installation requirements that follow apply to B2256. Deviations from these requirements for the remaining buildings B2257, B2258, and B2259, are explained here.

B2256 and B2258 have the same MER layout. B2257 and B2259 have the same MER layout, being mirror images of B2256 and B2258. Deviations are as follows:

B2257

The existing chilled water filter (see Attachment B, page 17) is located where the existing concrete housekeeping pad will be extended to, near the far MER wall. It will need to be removed and re-installed, preferably on the new extended concrete housekeeping pad. This includes all piping necessary to re-install it and re-filling of the CHW system. Purge any air out of piping after installation by running the CHW pumps and bleeding air.

B2259

In place of an existing domestic hot water boiler, there are two (2) tank-style water heaters that will be removed and replaced with one (1) DWHB. See Attachment B, page 21.

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CLIN0001AA: REMOVE ABANDONED STEAM EQUIPMENT AND PIPING

Much of the former steam equipment and piping was removed back in 2002 when boilers replaced central steam, but there is still abandoned equipment and piping in place. This equipment and piping shall be COMPLETELY removed under this project and is confined to the end wall of the MER – see B2256 photos in Attachment B. Removal of this abandoned steam system will allow for concrete housekeeping pad extension and general clean-up of the end of the MER. For purposes of bidding the removal of this leftover system, use the following estimates:

- Two (2) flash tanks

- 100 feet of 6-inch piping, including elbows, valves, traps, and PRVs.

Leftover piping penetrating walls/floors shall be capped close to the walls/floors.

See Section 3.2 for anticipated ACM abatement requirements.

CLIN0001AA: COMBINE MULTIPLE GAS SERVICES INTO ONE NEW SERVICE

Each dormitory building is served by two existing gas meters. One gas meter serves the domestic water heater, and the other gas meter serves the heating water boiler. The gas meter serving the domestic water heater will be de-energized and its gas load will be added to the new gas meter that will serve the boilers and the domestic water heater for each dormitory building.

Replace Existing Gas Meter Serving Heating Water System

4.3. Replace the existing gas meter that serves the heating water boiler and de-energize the existing gas meter that serves the domestic water heater.

4.3.1. Design team shall coordinate with Avista for the removal of the existing gas meter and installing the new gas meter, located near the MER area wells of each dormitory building B2256, B2257, B2258, and B2259. Contractor shall use Avista as the subcontractor for this work.

4.3.2. Design team shall coordinate with Avisa for de-energizing the existing gas meter along Doolittle Avenue serving dormitory buildings B2256, B2257, B2258, and B2259. See Attachment B, page 13.

4.3.3. Design team to confirm existing 1-inch, polyethylene, 10 psi, high-pressure building gas service is properly sized to handle new connected gas load of two (2) boilers plus one (1) domestic water boiler with 0.5 psi to 1.0 psi pressure drop downstream prior to new gas meter. Government has performed preliminary calculations and believes the existing underground gas piping infrastructure serving all four (4) buildings (B2256, B2257, B2258, B2259) is adequate.

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CLIN0001AA: ADD NEW ELECTRICAL PANEL

Each dormitory building has an electrical room within the MER. Existing mechanical equipment part of this SOW uses Panel M (see Attachment B), which is fed by a 208Y/120V, 3-phase, 4W, 1000A switchboard (see Attachment B, page 14). With the addition of an extra boiler and boiler pumps, the existing Panel M will not have sufficient space to accommodate the extra equipment.

Install New Electrical Panel to Support Additional Mechanical Equipment

4.4. Add a new electrical Panel “M2” in the existing electrical room.

4.4.1. Panel shall have minimum 30 spaces.

4.4.2. Panel shall be 208/120V.

4.4.3. Provide new circuit breaker and feeder in existing switchboard to new panel. If existing 100A, unlabeled circuit breakers (see Attachment B, page 15) in existing switchboard are spares, these circuit breakers may be used. Design team to field verify.

4.4.4. Exact location for new Panel M2 shall be field verified and coordinated with the government.

4.4.5. Provide circuit breakers and feeders from new Panel M2 for extra boiler and boiler circulation pumps. If other design equipment/components require electrical panel space, Panel M2 shall be used.

4.4.6. Provide all power wiring, conduit, and circuit breakers to complete the new work.

CLIN0001AA: REPLACE HEATING WATER BOILERS

Each dormitory building has one (1) existing gas-fired hot water heating boiler that will be replaced with two (2) new high-efficiency gas-fired condensing boilers. The work for Building 2256 is described below and there are three (3) more similar buildings with near identical mechanical room layouts. Buildings 2256 and 2258 have the same mechanical room layout and Buildings 2257 and 2259 have the same mechanical room layout, being mirror images of Buildings 2256 and 2258. Deviations present in each mechanical room are noted in the section above.

Replace Existing Gas-Fired Boiler with High-Efficiency Gas-Fired Condensing Boilers

4.5. Replace the existing Fulton boiler with new high-efficiency gas-fired condensing boilers. Existing boiler name plate can be found in Attachment B. Basis-of-design for new boilers is Lochinvar Knight XL (see Attachment E).

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4.5.1. Disconnect existing boiler from existing heating water piping in approximate location as shown on Attachment C. Also see Attachment B for photos of the existing boiler piping. Remove existing flue exhaust and ventilation air intake piping which terminate in a mechanical area well, approximately 15 feet below grade; remove flue exhaust muffler; remove boiler drain piping, gas piping from boiler back to existing gas meter; all associated accessories in line with such systems (gas trains, valves, gauges, etc.); disconnect unit from existing electrical service. Re-use the existing boiler relief valve collection tank – see Section 4.5.6.4.

4.5.2. Remove natural gas piping from existing gas meter back to existing boilers, including pulse output gas energy meter, all gas trains, regulators, etc.

4.5.2.1. This will requiring de-energizing the gas service to the building.

4.5.2.2. Install new pulse output gas energy meter with BACnet capability – see Attachment B, page 1. Install downstream of new gas meter and verify communication of this energy meter with FAFB EMCS.

4.5.3. Provide two (2) new high-efficiency condensing gas boilers each capable of meeting two-thirds (2/3) of the heating output of the existing boiler. Existing boiler is “Fulton PHW-750 Gas-Fired Pulse Combustion Boiler”. Boilers shall be direct-vent (no combustion air from inside the mechanical room). Mount boilers on a concrete housekeeping pad (see Attachment D1). Terminate direct-vent piping in the existing mechanical room area wells. Existing air intake area well is separate from exhaust area well – keep exhaust and air intake separate per existing area well layout.

4.5.3.1. Existing concrete housekeeping pad to be extended to existing basement wall and to existing corner by pouring new attached concreted housekeeping pads – see Attachment D1. Existing concrete housekeeping pad is approximately 70 inches wide. Add to this pad (do not remove).

Attachment D1 may be scaled using graphic scale on drawing for estimating extended concrete housekeeping pad requirements. Width will remain the same, but pad will be extended. Match existing concrete housekeeping pad thickness (4 inches). See also Section 4.6.6.

4.5.3.2. Do not block existing floor drain located adjacent to existing concrete housekeeping pad.

4.5.4. Install new pulse output gas energy meter, provide new gas piping, valves, gas dirt legs, regulators; reconnect new heating water piping to existing heating water piping (see Attachments D1 and F). Shut-off valves shall be installed on all equipment to isolate them for maintenance/replacement. Route boiler condensate to nearest floor drain and install condensate neutralization kits on each boiler drainpipe.

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4.5.4.1. Existing gas piping is 2 inches. Design team to assume (for bidding) that new gas piping will also be 2 inches to supply new total boiler gas MBH plus domestic water boiler MBH capacity.

4.5.4.2. Natural gas piping shall be black steel.

4.5.5. Provide the following accessories for each boiler: BACnet compatibility, Condensate Neutralization Kit, Variable Speed Boiler Pump, Alarm Bell.

4.5.6. Install boilers in arrangement shown on Attachment D2, which is a primary/secondary arrangement. Provide angled temperature thermometers on the supply and return header piping common to each boiler. Piping components shall include shut-off valves (to isolate each boiler for maintenance), strainers, flow check valves, flow switches, P/T ports, relief valves, drain valves/ports, for each boiler. Maintain maximum of 12 inches of separation between the supply and return headers connecting to the main heating water piping. Engineered design shall include, at a minimum, manufacturer’s minimum and recommended piping components according to their installation diagram. Reconnect to existing heating water systems.

4.5.6.1. Boiler circulation pumps shall pump water through the boilers and not away from them, per Attachment D2.

4.5.6.2. Gas pressure regulators shall be provided for each boiler.

4.5.6.3. Provide pipe unions at boiler connections to allow for removal of boilers.

4.5.6.4. Relief valves from boilers shall flow back to a collection tank. Re-use the existing collection tank for this purpose. See Attachment B, page 9.

4.5.7. Re-fill heating water system with a 30% propylene glycol solution per FAFB BDG, Section 230000, J.3.

4.5.8. Reconnect to base EMCS. Boilers shall operate on a lead/lag basis. If one boiler is unable to maintain the heating load requirement, the lag boiler shall energize.

Provide all controls and programming to successfully integrate new boilers into the existing heating water system.

4.5.9. Remove the existing glycol make-up feed tank and install a new packaged glycol make-up feed tank capable of serving both the heating and chilled water systems.

Tank shall be 55-gallon poly tanks with two (2) each 2-gpm (1/3 hp) pumps and mounted on a painted steel stand. Provide two (2) copper plumbing loops.

Provide a pre-configured ETL listed XS series controller pre-wired for a dual pump system, BACnet communications card (read/write). Basis-of-design is Advantage Controls (see Attachment E), Model GF-1A11A22H-C22.

4.5.9.1. Locate new glycol make-up feed tank on new housekeeping pads and keep clear of existing MER area well doors. See Attachment D1.

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4.5.9.2. Provide all piping and electrical required per manufacturer’s installation instructions.

4.5.9.3. May connect to same location on heating water return and chilled water return currently used by existing glycol make-up feed tank system.

4.5.9.4. Connect to base EMCS.

4.5.10. Provide all electrical work for new boiler systems, including glycol make-up.

Existing systems used Unistrut to mount switches and disconnects. This is acceptable, but the government prefers to minimize the use of Unistrut if such switches and disconnects can be mounted on walls. With the new mechanical systems being installed, more space is available near existing walls.

4.5.11. Provide a new carbon-monoxide sensor for the mechanical room in accordance with UFC 3-600-01, Section 9-18. Connect this sensor into the FACP and provide required programming.

CLIN0001AA: REPLACE DOMESTIC HOT WATER BOILERS / HEATER(S)

Each dormitory building has one (1) existing gas-fired domestic hot water boiler (DWB) (see exception for B2259 on page 7); B2259 has two (2) domestic hot water heaters (DWH)). These systems will be replaced with one (1) new high-efficiency gas-fired domestic hot water boiler.

In addition, the existing domestic hot water storage tank will be replaced with new. The work for Building 2256 is described below and there are three (3) more similar buildings with near identical mechanical room layouts. Buildings 2256 and 2258 have the same mechanical room layout and Buildings 2257 and 2259 have the same mechanical room layout, being mirror images of Buildings 2256 and 2258. Deviations present in each mechanical room are noted on page 7.

Replace Domestic Hot Water Boilers / Heater(s)

4.6. Completely remove and properly dispose of the existing DWBs and DWHs, storage tank, piping systems, flue systems, thermostatic mixing valves, and associated accessories (including electrical disconnects mounted on nearby Unistrut) as follows:

4.6.1. Remove one existing DWB or multiple DWHs (two (2) DWHs in B2259 only – see Attachment B), partial associated flue, and interconnecting water piping back to the domestic hot water service mains serving the dorm building. These mains exit the MER near the MER entry door. See Attachment D1 for extents of piping demolition.

4.6.1.1. Remove DCW, DHW, and RHW piping back to extents shown on Attachment C.

4.6.2. Remove the existing DHW storage tank and associated piping.

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4.6.3. Remove existing DHW recirculation pump, associated piping, electrical wiring, and controls.

4.6.4. Disconnect cold water service at location shown on Attachment C. Do not interrupt or disturb existing fire water main piping or backflow devices serving fire water and domestic mains.

4.6.5. Disconnect natural gas piping and cap near MER wall/roof penetration. Also cap gas piping immediately after existing gas meter located along Doolittle Avenue.

Gas piping shall be purged prior to capping.

4.6.6. Existing concrete housekeeping pad to be extended to existing basement wall and to existing corner by pouring new attached concreted housekeeping pads – see Attachment D1. Existing concrete housekeeping pad is approximately 70 inches wide. Add to this pad (do not remove). Attachment D1 may be scaled using graphic scale on drawing for estimating extended concrete housekeeping pad requirements. Width will remain the same, but pad will be extended. Match existing concrete housekeeping pad thickness (4 inches). See also Section 4.5.3.1.

4.7. Install one (1) commercial condensing DWB with like capacity and performance, considering thermal efficiency, as that of existing and that fits on the footprint of the extended concrete housekeeping pad. DWB shall have integral circulation pumps (these are not DHW recirculation pumps). DWB shall use natural gas and shall be direct vent. Existing DWB information is as follows (for reference in comparing to new) – see Attachment B, page 4:

4.7.1.1. Lochinvar model CWN0497PM.

4.7.1.2. Natural gas input of 495,000 btu/h.

4.7.1.3. Recovery @ 100°F rise of 486 gallons per hour.

4.7.2. New basis-of-design DWBs (for reference only):

4.7.2.1. Lochinvar Armor, model AWH0500. See Attachment E.

4.7.2.2. Natural gas input of 500,000 btu/h

4.7.2.3. 600 gallons per hour recovery at 100°F temperature rise.

4.7.2.4. Thermal efficiency of 99%.

4.7.2.5. 10:1 turndown ratio.

4.7.3. DWBs shall be current production model with parts readily available from a local distributor. Water heaters shall be ASME Certified and ANSI Z21.10.3 Certified.

4.7.4. DWBs shall have a minimum 96% thermal efficiency.

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4.7.5. DWBs shall be BACnet compatible. Provide additional EMCS control points as follows: DWB On/Off for each DWB, domestic hot water recirculation pump On/Off, domestic hot water recirculation pump current sensor (CT).

4.7.5.1. DWBs shall be controlled per the manufacturer’s recommendations for interaction with water storage tank temperature. Basis of design control system is per the model listed in Section 4.7.2.1. Controls contractor to provide all necessary controls points (including all hardware) and programming (where necessary) for executing this control sequence.

Maximize boiler efficiency through equipment integral software programming.

4.7.6. DWBs shall have a stainless-steel heater exchanger.

4.7.7. DWBs shall include a condensate neutralization kit and shall be installed on the condensate pipe prior to discharge to the mechanical room floor drain.

4.7.8. DWBs shall draw combustion air from the existing mechanical room area well (install intake in fresh air area well, not exhaust area well). Provide with appropriate combustion air inlet terminations.

4.7.9. DWBs shall be able to direct vent to the exterior. Contractor may use the existing flue vent pipe in vicinity of the existing DWB if design team determines existing pipe size is properly sized; if not, then flue shall be vented to the exhaust area well without the use of draft fans (preferred).

4.7.10. Install a new domestic hot water storage tank. Design team shall calculate required capacity using one person per dorm room (“Living Unit” on existing drawings), plumbing fixtures available in each dorm room, and recovery rate of new DWB.

See Attachment F. Consider available pathway restrictions to MER when selecting tank(s) diameter.

4.7.10.1. Domestic hot water shall be stored at 140°F. Design team to calculate appropriate delivery temperature out of MER.

4.7.11. Install a new removable bladder, carbon steel expansion tank for the existing domestic hot water service. Design team shall calculate required capacity. See Attachment D1 for concept location. Connect expansion tank to domestic cold water service downstream of existing check valve to prevent water from pushing back into domestic cold water service. When connecting to domestic water system, pipe size shall be full size of connection on expansion tank. Install shut-off valve to isolate expansion tank for maintenance.

4.7.12. Install a new thermostatic mixing valve. Basis-of-design is “Symmons TempControl”. See Attachment E.

4.7.13. Providing new copper piping for all new domestic water piping. All shut-off valves, check valves, drain valves, etc., shall be of bronze construction. Piping

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shall be installed such that it does not interfere with manufacturer’s clearances, access panels, etc.

4.7.14. Provide di-electric unions when connecting dissimilar metals.

4.7.15. Provide ball shut-off valves at inlet and outlet connections to DWB, on drain pipe, and according to manufacturer’s recommended installation. Provide pipe unions at boiler connections to allow for removal of boilers. DWB must be able to be isolated for repair/maintenance. Do NOT install shut-off valves on the DWB condensate pipes.

4.7.16. Install T&P relief valves per manufacturer’s instructions and route full-size to within 6 inches of floor with minimal elbows. These do not need to be routed to the floor drain.

4.7.17. Provide insulation on ALL new piping, including cold-water piping. Insulation thickness shall be per Washington State Energy Code.

4.7.18. Natural gas piping shall be black steel. Natural gas will be provided from new gas meter system.

4.7.19. Provide valve tags for all valves. Coordinate with government.

4.7.20. Provide required testing and disinfection of new plumbing systems.

4.7.21. Provide all electrical to connect the new domestic water heater. Existing leftover wiring from components no longer used shall be removed back to the existing electrical panel or back to the point of connection. Do not leave abandoned electrical systems in place.

4.7.22. Provide control work to integrate new control points (see 4.7.5.1) into existing

EMCS.

Perform all start-up of equipment to ensure proper operation and EMCS communication. Coordinate with FAFB EMCS (509-247-2817) to ensure all control points within the scope of this project are fully integrated and functional.

4.8. Testing, Adjusting, and Commissioning: Provide all testing, adjusting, and commissioning required by MACC Specifications, Fairchild Air Force Base Design Guide, and manufacturer’s requirements. This includes FAFB EMCS being able to communicate with all installed equipment and any controls modifications and having visibility of all new and affected systems on their monitors.

4.9. Site Restoration: The contractor is responsible for restoring all site areas that are disturbed by the construction activities. Repair surrounding surfaces and structures impacted by construction.

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4.10. As-Built Information: The contractor shall provide data stored with an AutoCAD (.dwg) file. The contractor shall submit these files as well as a Portable Document Format (.pdf) of the AutoCAD drawings.

4.10.1. As-Built Information

4.10.1.1. As-Built Specifications can be found in the current Base Design Guide

(BDG).

4.10.1.2. AutoCAD As-Built Drawings must adhere to the current A/E/C Standards, current A/E/C Graphic Standards, and other stipulations outlined in the

BDG.

4.10.1.2.1. The most up-to-date A/E/C standards can be found in the CAD BIM Technology Center Website (https://cadbimcenter.erdc.dren.mil/). A courtesy copy will also be provided by Fairchild AFB.

4.10.1.3. GIS does not apply to this project.

4.10.2. Survey Information

4.10.2.1. There are no survey requirements for this project.

4.11. Submittal Quantities:

SUBMITTAL DESCRIPTION NUMBER OF COPIES

35%/65% DESIGN

Drawings - Full Size 1 (paper) Drawings - Half Size 2 (paper) Design Analysis, Hazmat Survey, Specifications (on drawings) 1 (paper)

ELECTRONIC DATA (CD) – 35%/65% DESIGN

AutoCAD Drawings (files) + PDF

1 CD (electronic)

Design Analysis, Hazmat Survey, Specifications (on drawings)

AS-BUILTS

Drawings – Full Size 1 (paper) AutoCAD Drawings (files)

1 CD (electronic) Preliminary O&M (near end of Phase II) Final O&M

5. MATERIALS

All materials, products and systems used on this project shall be non-toxic, certified to be asbestos free, containing lead only under the provisions of the Code of Federal Regulations (CFR) Part 1303. The materials called out in this Statement of Work are for Basis-of-Design.

All products proposed must meet the Fairchild BDG and these salient characteristics.

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Attachment 2 - Statement of Work https://cadbimcenter.erdc.dren.mil/

6. ATTACHMENTS

Attachment A – Project Site and Haul Route

Attachment B – B2256, B2257, B2258, B2259 Photos

Attachment C – 15% Concept Demo Plan

Attachment D1 – 15% Concept Plan

Attachment D2 – 15% Concept Plan

Attachment E – Basis-of-Design Equipment

Attachment F – Existing B2256 Drawings (includes B2257, B2258, B2259)

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