Att 3 - SOW - Replace Bronx Boiler Plant R12 - 6-16-25.pdf

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

Replace Bronx Boiler Plant

SCOPE OF WORK

CONSTRUCTION SERVICES

The Department of Veterans Affairs is accepting proposals from qualified firms to provide Construction services for labor, material and supervision related to the Replace Boiler Plant construction project located at the James J. Peters VA Medical Center, 130 West Kingsbridge Road, Bronx, New York 10468.

The purpose of this project is to

A. The primary project objective is to replace the existing three 40,000 lb/hr boilers at the Bronx, NY VAMC.

B. As part of this effort, the tasks include renovations of the Boiler plant and ensuring the project meets VA TIL/design guides mitigation measures.

The project is to provide professional construction services for the replacement of the boilers and associated equipment within Building 101 located at the James J. Peters VA Medical Center in Bronx, NY. This project will involve replacing the majority of the equipment and piping systems associated with the water tube steam boiler generation system. The heating requirements of the James J. Peters Medical Center are met from the central hearing plant which houses three 40,000 lb/hr boilers that generate high pressure steam (130 psig) which is distributed throughout the medical Center. Pressure reducing stations reduce the steam pressure to both medium and low pressure as required for the equipment being served. Condensate is gravity returned to condensate receivers located in the service tunnel and pumped back to the main condensate tank located in the central plant. The boilers were installed in 1977 and have been continually repaired / upgraded over the years; new replacements are required to enhance the reliability of the system to provide support to the Medical Center. All work shall be completed as specified on the plans, specifications, and contract documents.

The contractor will be required to perform sub-surface mark-outs, utilizing GPR and other industry-recognized equipment and methodologies, towards a thorough identification and location of existing underground utilities affecting this project and its successful completion.

Contractor shall use the services of an independent firm that provides these services as a typical or primary business offering. The Contractor must meet all applicable regulations of 6NYCRR Subpart 613-4 AST Systems and 40 CFR 112. The contractor must register the Tanks with NYSDEC and modify the NYS DEC Air Permit. Tanks must be marked (stenciled) with the tank registration identification number, as well as the tank design and working capacities. In addition, all work shall be done in accordance with the contract design documents.

The contractor will be responsible to hire temporary boiler plant operators as required to operate and maintain the temporary boiler plant until it has run continuously with no fault at planned capacity, It`s also the responsibility of the contractor to maintain the temporary boiler equipment all the time during construction while the existing boilers are

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center replaced, the time that would be allowed for repairs t maintain the temp boiler equipment should be Four hours or less. Emergency response should be 24 hours 7 days a week.

CIVIL:

A. The primary objective for the site / civil engineering improvements is to restrict access to authorized vehicles while providing the necessary onsite accommodations for temporary facilities to allow continued functionality during the project.

B. Initial site demolition will occur to facilitate the installation of the temporary facilities and shall include the following activities:

1) Establishment and demarcation of project limits.

2) Removal of portions of existing curbing, sidewalks, fencing and lawn area(s) to accommodate installation of new site access control, new entry point to southern parking lot, and security and separation measures between public and construction areas.

C. Subsequent to site demolition activities, site construction requirements necessitate the following:

1) Provide required stand-off distances as indicated in PSRDM Report to separate construction functions from public / hospital functions.

2) Establish a secure contractor staging area / temporary facilities area in the west end of the existing parking lot southeast of the energy center building.

3) Provide secure access to the work area, currently proposed to be established along the existing access road.

4) Locations for the new 30,000-gallon fuel oil tank for the emergency boiler and generator operations is to be located in a new enclosure located along a service drive to the southwest of the employee parking area designate for temporary operations. This new enclosure will be cut into the existing hillside and have retaining walls on three (3) sides. The side adjacent to the service drive will be screened with a blast rated wall for the protection of the storage tank.

5) To facilitate the installation of the tank enclosure a water supply line will need to be relocated within the hillside area. The relocation of this line will need to be closely coordinated with hospital personnel to minimize or prevent any disruptions to operations.

6) A new concrete encased duct bank will be required from either the CLC building, Fisher House or the Boiler Plant to route power and communications wiring to the gate location.

7) Restore the post-construction site to existing conditions, with any functional improvements resulting from the project. The entrance for the parking lot will remain at the southeasterly end of the existing parking lot and a new curb will be constructed at the northwesterly corner of the existing parking lot.

STRUCTURAL:

1) Interior Equipment Pads:

(i) New cast-in-place concrete equipment pads will be installed for the proposed electrical and mechanical equipment on the boiler floor.

(ii) Existing cast-in-place equipment pads will be demolished or extended as required to suit the new equipment.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

2) Existing Structure

(i) The operating load for the new equipment is verified and found the existing floor is adequate for the new boilers, generator, CMU wall of control room and generator/LPG room.

3) New Stacks on the Roof

(i) The proposed new boiler stacks will be located on the existing roof.

(ii) The stacks will be supported by HSS steel tower and braced to the existing roof structure. The height of tower is 12 ft.

(iii) The existing roof structure will need to be penetrated for the new boiler stacks.

(iv) Additional supplementary reinforcement steel beams for the existing roof structure will be added as required.

4) New Boilers

(i) The new boilers will be located on the boiler-floor level.

(ii) Based on analysis, the dead load of each new boiler, when averaged by the gross footprint of the boiler, is approximately 260 psf. The floor design capacity, as per the as-built drawing general notes, is 280 psf. Therefore, the floor is anticipated to be capable of adequately supporting the weight of the new boilers.

(iii) The existing equipment pad will be demolished, and the new boiler will be anchored directly on the existing floor slab in accordance with the manufacturer’s requirements. The load of the rails are exceeding the capacity of the concrete floor slab, the supplementary steel girders shall be installed on the top the existing concrete floor slab to transfer the load to the existing beam and girders. The supplementary steel girder shall be secured to the existing concrete floor with bearing plates on the top of each support beams under the boiler foot print area.

(iv) The economizer, burner end platform and target end platform are upheld by posts supplied by the boiler manufacturer. The posts shall be anchored to the existing concrete floor.

5) New Equipment

i. The new DA tank will be installed in the same location as the existing DA tank.

The existing equipment piers will be demolished, and two new piers will be constructed to support the new DA tank on the mezzanine floor. Additionally, the existing maintenance platform will be demolished and replaced with a new maintenance platform for operation.

ii. The new condensate tank will be located in the same area of the existing tank on the basement floor. The existing equipment piers will be demolished, and two new piers will be constructed to support the new tank.

iii. The pumps on the basement floor will utilize the existing pad or a new pad as required.

iv. New pads will be provided for the new equipment such as electrical panels and pumps on the boiler floor.

6) Boiler Operation Platform

(i) The operation platforms shall be mounted on the boiler and provided by boiler manufacturer.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

7) AHU Mezzanine and Catwalks

(i) Three new AHU mezzanines are installed at an elevation of 20’-0” above the

Boiler floor. The AHUs are supported by the mezzanine frame and suspended from the roof frame system. The mezzanines are reinforced with horizontal and vertical bracings to withstand lateral loads.

(ii) Walkways are established between the AHU mezzanines for operation and maintenance purposes. These walkways are suspended from the roof system.

Horizontal and vertical bracings are utilized to resist lateral loads.

(iii) Grating is installed on both the mezzanines and walkways.

(iv) A safety guard railing system will be installed along the exterior edge of the mezzanines and walkways.

8) Emergency Generator and LPG Storage Room

(i) The emergency generator and room will be positioned at the North-East corner of the boiler building. The wall construction will consist of 8" CMU reinforced wall for bearing and shear purposes.

(ii) The roof of the generator and LPG Storage Room will be designated as an open storage area. The roof will be a 5" thick light weight concrete slab on 1 1/2" steel decking. The slab will be supported by W10 beams and will bear on the CMU walls.

(iii) The new generator will be located on a 6” thick pad. The existing opening will be infilled with steel framing and reinforced concrete composite deck slab.

9) Existing Stack Demolition and opening cover

(i) The existing stack shall be demolished.

(ii) The opening shall be covered with a 3” 18 GA metal roof deck, which is supported by W10 steel beams that are anchored to the existing concrete wall ed.

10) Control and Office Room and Roof

(i) The control room needs to be expanded to fulfill the client’s specifications.

(ii) The existing walls and roof of the control and office room must be demolished and replaced.

(iii) The wall will be reinforced CMU-bearing walls.

(iv) The roof framing design will be capable of supporting the proposed CU units and corresponding live load.

11) Overhead Door and Catch Curtain

(i) The overhead (OH) doors shall be replaced with blast-rated OH doors. The existing door jambs shall remain and be reinforced with new channel steels behind them to provide adequate support for the OH doors. The channel posts shall be anchored to the floor slab with a base plate at bottom and a horizontal angle anchored to the top floor deck flute to transfer the lateral load to the building floor system.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

(ii) Per client requirements, the OH door on the boiler side needs to remain open for ventilation. Therefore, a catch curtain shall be installed behind the OH door. The curtain shall be supported by two horizontal frame with the same elevation of the mezzanine. Vertical bracing shall be provided for each post to transfer the lateral load to the mezzanine. The curtain shall be mounted on the floor slab at the bottom.

12) Wall Openings

(i) Some wall openings are required for the installation of louvers.

(ii) The location and size will be decided per MEP requirements.

13) Existing Floor/Roof Opening Infill

(i) Some existing floor/roof openings will be infilled as required by MEP.

(ii) Supplemental steel reinforcements and metal deck will be added beneath the floor/roof slab to match the existing.

14) Fuel Tank

(i) Fuel tank will be supported by concrete piers.

(ii) The area of the fuel tank shall be enclosed by a concrete retaining wall. The footing of the retaining wall will be stepped to suit the slope of the area.

(iii) Slab on grade is adopted in the area.

15) Structural Special Inspections

(i) In accordance with Section 1704 of the international building code, and all applicable state and local requirements, the Contractor shall contract with an independent approved agency to make periodic and/or continuous inspections of the construction progress in accordance with the following requirements:

Steel Construction Section 1705.2

Concrete Construction Section 1705.3, Table 1705.3

ARCHITECTURAL

1) In general, the new architectural elements follow basic requirements needed to support the mechanical replacements of the Boilers and its staff.

2) Physical Security Design will play a role due to the mission critical requirements of the boilers and engineering infrastructure that services the main hospital.

Architecturally, this will affect the following:

(i) New exterior louver and door for the Generator Room, necessitating blast resistance on the new wall and opening elements.

(ii) The exterior door for the LPG Room will be designed for blast resistance.

(iii) Replaced exterior doors on the South and West Elevations will be designed for blast resistance.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

(iv) Replace existing overhead doors in the East Elevation. The Boiler door will be a conventional overhead door with a catchment curtain behind (for blast) so the door can be partially open for ventilation. The Chiller door will be a new blast resistant overhead door.

(v) Replace existing overhead doors in the West Elevation (Condensate Tank Room) with new blast resistant overhead doors.

3) Emergency Generator Room: The new room will have concrete masonry bearing walls and ceiling structure of concrete over metal deck (see Structural Narrative). The room will have two exits – an interior door into the boiler plant, and an exterior door. The new exterior louver will be sized to coordinate with the existing slate panel veneer.

Doors will be hollow metal. Interior finishes will be epoxy coated floor, painted walls, and exposed ceiling structure.

4) LPG Storage: The new room will have concrete masonry bearing walls and ceiling structure of concrete over metal deck (see Structural Narrative). There will be both exterior and interior hollow metal doors. Interior finishes will be epoxy coated floor, painted walls, and exposed ceiling structure. Interior finishes will be epoxy coated floor, painted walls, and exposed ceiling structure. The exterior double doors will swing out to provide relief in the event of a gas explosion.

5) Control Suite: The existing control room is cramped. An expanded workspace is proposed for engineering staff to work and monitor the new boilers. The mezzanine over the Office and part of the Control Room will be replaced with a new structure of concrete on metal deck supported on new concrete masonry bearing walls (see Structural Narrative). The Office will be reconstructed to match its current size. New doors and frames will be hollow metal. The entire control suite will be refinished.

Casework countertops, viewing windows, acoustical ceilings, painted concrete masonry walls, sheet vinyl flooring and rubber base are proposed.

6) Staff Lounge and Housekeeping: The existing lunch space is very narrow and lacks any seating for staff. The room will be made wider to allow for kitchen cabinets, sink, refrigerator, and furniture. A Housekeeping Closet is added next to the Lounge. New doors and frames will be hollow metal. Finishes include sheet vinyl flooring, rubber base, painted drywall and concrete masonry walls, and acoustic panel ceiling.

7) Locker / Bathrooms: The existing locker and bathroom will be reconfigured to provide ADA accessibility, and separate facilities for men and women. The proposed design divides the current space in half creating two rooms combining lockers with toilets and shower. Each room (Men’s and Women’s) will have the following:

1) Seven (7) new metal lockers (two tier, 15” wide, 18” deep). Epoxy flooring (RES-2) with base, high build painted concrete masonry, acoustic panel ceiling. The entry door and frame will be hollow metal.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

2) One accessible toilet stall with ceiling hung metal toilet partition, two countertop lavatories, and one roll-in ADA shower compartment with changing area and bench.

Finishes include epoxy floors (RES-2), solid surface wainscot, high build painted drywall, and drywall ceilings. The shower enclosure is full height solid surface wall and solid surface shower base. Accessories will include shower curtains, mirror, grab bars, soap dispensers, paper towel dispensers, and toilet paper dispensers. A sanitary napkin receptacle will be provided in the Women’s toilet.

3) Outside the locker room accessible drinking fountains, emergency shower, and a new water testing sink with cabinet will be provided.

8) Boiler Room: The Boiler Room will receive new Stonhard epoxy coated floor finish (RES-2), and repainted concrete masonry walls. Contractor will prep the floor, grind/sand it down and repair the floor as needed to receive the epoxy.

9) Mezzanine / Catwalk Stair: A new mezzanine / catwalk stair will be steel with metal grate treads and open risers. The design will comply with standards for Industrial Equipment Access in NFPA 101 Life Safety Code.

10) Roof Access Stair: The existing roof access stair will be replaced with steel with metal grate treads and open risers. This stair will meet NFPA 101 requirements for new stairs.

The new stair is designed so the intermediate landing provides access and egress from the new mezzanine / catwalk system.

11) DA Tank Platform: The new DA Tank platform is higher than the new mezzanine and will be accessed by a ladder from the existing mezzanine level.

12) Roof Areas: The existing roof access door will be replaced with new galvanized hollow metal door and frame. The existing ladder to the high roof will be replaced with a new aluminum ladder. OSHA regulations no longer allow a ladder cage to serve as fall protection, so a cage will not be provided. The ladder is about 16 feet tall, so a fall protection system is not mandatory.

13) Roof: The existing roofing system over the Boiler Plant (High Roof) will be removed down to the existing concrete fill. New roofing will be a SBS Modified Bituminous system.

14) Boiler Stack: The existing boiler stack will be removed, and the opening at the tunnel capped. The cap will include steel framing and metal deck (see Structural Narrative) covered with a SBS Modified Bituminous roofing system. The roof will pitch to drain onto the adjacent ground.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

FIRE SUPPRESSION SYSTEM:

(i) The building fire water supply connects to an existing water system that is served by a fire pump.

1. Capacity

(i) The required fire flows and pressures for buildings provided with automatic sprinkler protection shall comply with NFP 13 and other applicable NFPA standards. A minimum hose stream allowance for total combined inside and outside firefighting to be provided to comply with NFPA 13.

2. Fire Pumps

a. An existing, 2500 GPM @ 135 net pressure PSI electric horizontal split case fire pump is provided in the building to supplement fire flow and pressure. The fire pump is sized for the sprinkler system requirements. The local responding fire department will provide the necessary flow and pressure for manual firefighting operations.

3. Duration

a. Fire flows shall be available as required by NFPA 13 for the required occupancy classification.

4. Automatic Sprinkler System

a. VA occupied buildings are required to have sprinkler protection. A wet pipe automatic sprinkler system in accordance with NFPA 13, except as indicated in the VA Fire Protection Design Manual, will be provided to protect all areas of the building.

Sprinkler protection shall be provided in all spaces including, but not limited to generator rooms, electric rooms, boiler room, plumbing or utility closets, and storage rooms.

Sprinklers are not required where specifically exempted by NFPA 13 and the VA Fire Protection Design Manual.

A flow switch, isolation valve, tamper switch, and pressure gage shall be provided for each zone. System status will be annunciated on the fire alarm control panel with signaling to the fire alarm reporting system.

Drainpipes for each sprinkler riser and test connection shall be routed to the building exterior to facilitate testing. Drains shall not terminate at service sinks.

Drain piping shall be 2-inch minimum to accommodate discharge from full flow tests at maximum system pressure.

Sprinkler systems shall be hydraulically calculated by any design approach allowed by NFPA 13, except that the Special Design Approach shall not be used in health care. Pipe schedule systems may be used for extension of existing pipe schedule systems where the water supply is adequate. A safety factor of 10% for each sprinkler demand including required hose streams shall be included.

Sprinkler densities shall comply with NFPA 13, except in rooms containing moveable/mobile shelving (high density storage) where the density shall be Ordinary Hazard (Group 2) and in the Generator room which shall be Extra Hazard Group 1.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

Quick response sprinkler shall be installed in all areas, except where specifically prohibited or noted elsewhere in the VA Fire Protection Design Manual.

Sprinklers shall be Factory Mutual (FM) approved as quick response except as identified below:

• Concealed sprinklers that are UL listed quick response and FM approved standard response are permitted in clean rooms provided that the rooms are not designed under negative pressure.

• Concealed sprinklers that are UL Listed quick response and FM approved standard response may be used with the approval of the VA where quick response sprinklers are prohibited.

FIRE ALARM SYSTEM:

A. In general, the existing fire alarm system elements follow basic requirements needed to support the mechanical replacements of the building and its staff. The existing Simplex fire alarm system will be modified for the project scope of work. New detection and alarm devices will be provided throughout the project scope area to comply with NFPA 72 and the VA Fire Protection Design Manual.

B. Purpose:

1) Notify the appropriate people and initiate the proper response from the people who are notified.

C. General Requirements:

1) A fire alarm system is required by NFPA 101 and shall be designed to meet the requirements contained in NFPA 72 and the VA Fire Protection Design Manual.

2) The fire alarm system shall not be combined with any other system. All fire alarm wiring shall be installed in raceway separate from all other systems.

3) Initiating Device Circuits (IDC) shall be class B. Signaling Line Circuits (SLC) shall be Class B.

4) Notification Appliance Circuits (NAC) shall be Class B. Communication between building fire alarm control units shall be Class X.

D. Typical Operation

1) Notification shall be by digital voice (speaker) system. The fire alarm system shall be designed such that it is possible to manually broadcast an emergency voice message within the building.

2) Fire alarm zones shall be coordinated sprinkler zones.

3) Provide initiating devices in accordance with NFPA 101 and NFPA 72.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

4) Placement and spacing of notification appliances shall be in accordance with NFPA 72 and shall be selected based on the purpose of the notification.

E. General Evacuation

1) Provide audible notification appliances to be heard in all locations throughout the project scope area.

2) Provide visible notification appliances in all publicly accessible areas of the building such as corridors, auditoriums, cafeterias, open assembly rooms ≥750 SF, canteens, retail stores, etc.

3) Flash rate shall not exceed one flash per second for visible appliances. S

4) trobes that operate on adjacent zones on each floor shall be synchronized with one another as required by NFPA 72.

5) Visible notification appliances are not required in the following spaces which are not considered to be public accessible:

(i) Individual office spaces unless the space is known to have a hearing- impaired person stationed there

(ii) Closets (janitors’ clothes, etc.)

(iii) Utility shafts

(iv) Crawl spaces

(v) Normally unoccupied rooms ≤100 SF

(vi) Normally unoccupied storage spaces where no regular activities take place other than placement and retrieval of storage

(vii) Stairway enclosures and elevators

(viii) Patient exam/treatment rooms

F. Special Requirements

1) Where smoke detectors are required, they shall be photoelectric type only.

2) Duct detectors are to be installed only where required by NFPA 101 or

NFPA 90A.

3) Where a duct smoke detector is located above a ceiling or in a difficult to reach location, provide a remote indicating lamp and test key switch on nearby wall at 7-feet AFF to facilitate testing.

G. Carbon Monoxide Detection

1) Carbon monoxide detection shall be provided as required by NFPA 101.

PLUMBING:

The scope of this project is as follows:

1) The existing restroom water closets, urinals, lavatories, shower, and floor drains shall be removed. Existing plumbing piping shall be removed back to mains and capped.

New plumbing piping shall be extended from main to new restroom fixtures.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

2) The new break room will have a new stainless-steel sink and bottle filler. New plumbing piping shall be connected to existing and extended to serve fixtures.

3) The existing chemical test sink shall be removed. Existing plumbing piping shall be removed back to mains and capped. New plumbing piping from existing shall be extended to new chemical test sink.

4) A new emergency shower / eyewash station shall be provided and served from a new thermostatic mixing valve.

5) The new boiler plant will include a new water softener system to serve mechanical equipment.

6) Each lavatory, sink or shower will be provided with a temperature reducing mixing valve and/or anti-scald device to limit outlet temperatures at 110 deg. F maximum to allow for higher temperatures in the distribution system in support of legionella control.

MECHANICAL:

1) Boiler Sizing: The new boilers will be located in approximately the same locations as the existing boilers. The new boiler plant will include three (3) 40,000 lbs/hr (PPH) water-tube boilers.

2) The building area totaled 727,591 SF, and based on correspondence with VA staff, there is no planned additional building square footage for the campus.

3) The boilers should be Cleaver-Brooks, Water tube boilers with integral burners.

The deaerator is sized for 20 minutes storage from overflow level at peak plant output requirements, according to the VA Steam Generation Design Manual. The calculated Steam Peak Load during occurs during the Pandemic mode which 73,800 PPH and 148 GPM. Therefore, the new deaerator will need to have a minimum storage capacity of 3,500 gallons. The deaerator should be Cleaver-Brooks TMV-70-3500 Tray Master deaerator. The new deaerator will be located in approximately the same location as the existing deaerator. The deaerator will include Three (3) variable speed feedwater pumps, sized One (1) per boiler. With Two (2) boilers operating, the third pump would be a standby (N+1). The pumps will be located on a packaged skid on the boiler level in the same location. This will allow for the lunch/break room to be enlarged.

4) Tray column sized to handle 77,000 PPH steam (154 GPM).

5) Also, as per the VA Steam Generation Design Manual, the condensate storage (surge) tank shall be sized for 20 minutes minimum storage to overflow level at peak plant requirements. The new surge tank will need to have a minimum storage capacity of 3,000 gallons and will be located in the same location as the existing condensate storage tank.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

The new surge tank will include two condensate transfer pumps, each sized for the peak output requirements. The second pump would be a standby (N+1)

6) The condensate storage tank should be Cleaver-Brooks SRG-3000.

7) The new boiler plant steam header will be designed to supply 110 psig steam to the hospital and equipment within the boiler plant that require steam. A new 14-inch HPS main header will be installed. The new header will be a segmental design with isolation valves that allows maintenance on sections of the header and still be able to keep the plant operational. This will make the steam header longer. All HPS shut-offs will have double blocking valves and vents between the valves.

8) New steel platforms with ladders will be provided by the boiler manufacturer will be included with each boiler to allow for access to the top of the boilers.

9) A new separate steel catwalk will be installed with a new stairwells. This catwalk will provide access to the new makeup air units. Refer to the architectural drawings for the location of the new stairs. This stairwell will also function as a secondary egress pathway from the new catwalk.

10) New Steam Pressure Reducing Stations will be located on the existing mezzanine level in the space currently occupied by the supply fan SF-1. One PRV station will be HPS-MPS (110-30 PSIG) , which serve equipment in the chiller room, unit heaters and the (3) new makeup air units (MAU). The other PRV station will be HPS-LPS (110-5 PSIG) for the new deaerator.

11) A boiler blowdown tank will be used to cool the surface and bottom blowdown waste streams prior to discharge into the sanitary sewer. The blowdown tank will be provided with non-potable water for mixing with the hot condensate to ensure a maximum of 140 deg. F water is discharged into the sanitary sewer system.

12) Natural gas will be the primary fuel with #2 fuel oil as backup fuel. PSRDM requires sufficient fuel oil storage to operate for 10 consecutive days of the most extreme winter days. The natural gas piping will be replaced downstream of the recently replaced Emergency Shutoff valve.

13) The existing (4) 30,000-gallon tanks for the boiler service are of insufficient size to meet the current PSRDM. The existing 30,000-gallon tank that currently serves the existing EMD generators will be re-piped to tie it into the existing (4) tanks that serve the boilers.

A new 30,000-gallon double-wall aboveground tank will be installed on the lower level in a new area created in the existing hillside. NYC requires 150% containment. The new tank area will require modifications to the existing concrete retaining wall. The new tank needs to meet all PSRDM requirements. The new tank area will be within a secure area and have a blast protection wall along the roadside. The new fuel oil tank will be including an access platform to access the top of the tank. A new fill port with a spill

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center container is provided outside the blast enclosure. The fill port will be flush with grade and surrounded by a concrete slab. All new fuel oil piping will have double-containment with leak detection.

14) LPG cylinders used as a backup fuel source for the fuel oil atomizer are now required per VA Standard detail SD235239-03.dwg to be located inside a separate room and must be located against an exterior wall. This room is shown adjacent to the new emergency generator room. The tanks are manifolded together into a single pipe that goes through a pressure regulating valve, an emergency shut-off valve that is tied into the new E- stop system. The pipe then enters the boiler room and rises up overhead and is routed to each boiler burner. The LPG cylinder room will be provided with a roof mounted exhaust fan to provide a minimum of 12 air changes/hour (ACH), with a purge mode of 20 ACH.

Since LPG is heavier than air, the exhaust duct/grille will be located within 12 inches of the floor.

15) Each boiler will have an exhaust stack economizer to reclaim heat from the exhaust gases to increase the temperature of the feedwater delivered to the boilers.

16) A new emergency generator dedicated to the boiler plant will be installed in a new room that will be located where the boiler exhaust duct currently drops through the floor into the existing tunnel. The generator will use #2 ultra-low sulfur fuel oil. This generator will be connected into the same storage tanks as the boilers. Fuel Oil usage calculations indicate a 350KW generator has a consumption rate of 21.9 GPH at 75% load. Based on the PSRDM requirements, the generator will require 3,588 gallons of fuel oil storage.

17) The existing fuel oil system will be replaced from the existing flanges located just inside the foundation wall in the unexcavated area to the new boilers. The system will include a new duplex pump sets for the boilers and a separate pump skid for the generator.

18) A new fuel oil maintenance system will be provided to filter and remove moisture from the stored fuel oil in the fuel oil tanks. The fuel oil maintenance system will be developed in the subsequent phases.

19) Boiler Combustion air and ventilation design: Per Vol 1 Steam Boilers Design Manual Section 5.1.1.3: Install roof-mounted exhaust fans to provide a minimum 12 air-changes per hour in the boiler area (or more to meet the maximum temperature defined). The boiler manufacturer requires a minimum of 8 CFM/per boiler horsepower. Based on the calculations minimum combustion air is 18,551 CFM and ventilation air is 56,677 CFM.

BOD is to provide Two (2) makeup air units (MAU’s) each sized for 30,000 CFM. This will bring 60,000 CFM heated ventilation into the boiler plant to meet the 56,677 CFM requirement. The MAU’s will be interlocked into the boiler control sequence. The new MAU units will be accessible from within the boiler plant on a new steel catwalk mezzanine. The MAU’s will include a MERV 8/13 filter bank, steam heating coil and dual plenum array supply fans. The new MAU’s will have outside air ducted from new actuated louvers located on the plan South wall between the low chiller roof and the

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center higher boiler plant roof. A secondary means to provide the combustion air as backup is required.

Additional HVAC Equipment:

20) The Control Room shall utilize a dedicated horizontal steam/chilled water blower coil unit mounted on the equipment deck above to provide ventilated supply air to condition the space. OA will be ducted to the return of the AHU to provide 24/7 ventilation.

21) The Lounge, Conference, and Office shall utilize a similar dedicated horizontal steam/chilled water blower coil unit as above for ventilating and conditioning the spaces.

Thermostat control will be located in the Office.

22) The ganged Locker Rooms shall utilize a dedicated horizontal steam/chilled water blower coil unit mounted above the ceiling to provide supply and return air to condition the space. Return air will come from a sidewall intake grille from the main boiler room.

Thermostat control will be located in the Mens Locker. A dedicated rooftop exhaust fan shall operate 24/7 to remove the conditioned supply air. This exhaust fan will duct over to pick up the new H.A.C. closet and Lounge exhaust as well. No direct ventilation is required per VA Room Design Data Sheets.

23) Existing Boiler Room main floor shall utilize a supplemental heating vertical throw steam unit heater – One (1) for the main overhead door.

24) Existing basement Condensate Tank and Pump Rooms shall include a horizontal throw steam unit heater – One (1) for the main overhead door, as well as a replacement of the 10K CFM ventilation axial supply fan mounted to the wall with new fan side guard, damper and intake louver. Operation will provide minimum ventilation 12 ACH and include supplemental steam unit heater for tempering the space.

25) Generator and LPG Storage rooms will each include dedicated horizontal steam unit heaters and rooftop exhaust fans for exhaust ventilation/cooling. The LPG flammable gas requirements dictate exhaust air capture ducted within 12” AFF. A new split DX wall mounted AC unit will provide cooling for the generator room.

26) Boiler Room primary exhaust shall utilize Two (2) 30K CFM rooftop upblast spark B rated exhaust fans with wire mesh screens and 2-position dampers. Exhaust fans shall utilize pressure differential sensors to track against the Two (2) MAUs to achieve the 12 ACH and keep the building slightly positive.

Air Distribution:

27) Ductwork shall be constructed of G90 galvanized steel, leakage class A and of the appropriate pressure class in accordance with its service and position in the system relative to the fan. New supply ductwork between the air handlers and shall be sized at a friction rate of 0.2 in per 100 ft for a medium pressure system for 4 in. w.g. Return and

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center exhaust ductwork shall be constructed at 2 in. w.g. pressure class for low pressure and sized at a friction rate ranging from 0.08 in per 100 ft to 0.1 in per 100 ft.

28) Flexible duct shall be used on supply ductwork for final connection to ceiling diffusers.

Flex duct shall be used on supply ductwork only and shall be limited to lengths not greater than five (5) feet.

29) Shower room wet exhaust shall require pitched aluminized ductwork and exhaust grilles.

Each new steam/chilled water AHU Three (3) shall utilize 2” MERV 8 and 4” MERV 13 filters.

30) Blast Rated performance intake and exhaust louvers shall be utilized for all new work exterior wall penetrations throughout.

31) All rooftop exhaust fans (5 total), shall utilize spark B resistance construction and include low-voltage 2-positon dampers for isolation. All OA intake louvers shall include low-voltage 2-position dampers as well.

32) All rooftop exhaust fans (5 total), shall utilize spark B resistance construction and include low-voltage 2-positon dampers for isolation. All OA intake louvers shall include low-voltage 2-position dampers as well.

Automatic Temperature Controls

33) Existing pneumatic controls and compressed air tubing will be removed back to its respective manifold and capped to maintain any existing controls out of project boundary.

34) New direct digital controls shall be applied to all systems and equipment proposed for the scope of work and shall be compatible as an extension of the existing DDC building automation system (Johnson FX).

35) All system components will be BACnet compatible.

PHASING

36) To facilitate renovation of the existing boiler plant and still provide steam to the Bronx VA campus Three (3) temporary high pressure steam boilers with a mobile trailer for a boiler operator control room will be provided. The temporary equipment will be in the parking lot to the southwest of the boiler plant. A temporary pipe rack will bring the temporary utilities from the temporary equipment and connect into the existing utilities to keep the existing steam system operational during the construction. The temporary boilers will be dual fuel (natural gas and No. 2 fuel oil). The natural gas will be provided by a temporary line and the fuel oil will be provided by a temporary fuel oil trailer and pump set.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

37) To get the condensate from the campus out to the temporary boilers, a temporary vented condensate receiver with duplex pumps will be located adjacent to the existing blowdown tank located in the basement pump room.

38) A temporary gas service is required for the temporary boilers. A new tap on the existing

8” MP natural gas main will be installed inside the existing pump room and then routed through the Unexcavated Space and then up and out to the temporary equipment.

ELECTRICAL:

A. Power

1) The boiler system, with its corresponding pumps, will be completely removed from the boiler building. The original source of power for these systems was MCC-2A, located on the main boiler floor.

2) A new 480-volt, 350-kW emergency standby generator will be provided to accommodate the new boiler electrical requirements within a new generator room. Generator system shall be provided with day tank, EPO switch and generator control panel. A new combination 30,000-gallon fuel storage tank will be provided to provide ultra-low sulfur fuel oil for the existing EMD generators along with all required fuel monitoring equipment and pumping. The new boilers and the generator will be fed from existing underground tanks.

3) Existing MCC-2A shall be demolished. An annunciator panel will be needed for this generator and is included as a part of this SOW.

4) A new 480-volt, 600-amps, 4-pole, bypass automatic transfer switch (ATS) shall be provided.

The normal side of the ATS shall originate from a new feeder back to existing switchboard MSS1-B. A new 600-amp Schneider circuit breaker shall be installed in switchboard. The emergency side of the ATS shall be fed from the new emergency generator.

5) Aluminum is prohibited in all electrical installations, only copper is allowed. This applies to everything electrical, including cables, windings and all components.

6) The load side of the new ATS shall feed new 600-amp, 480/277-volt main circuit breaker main distribution panel (BMDP).

7) An electrical coordination study will be performed by the contractor as outlined in the specifications.

8) The project will utilize temporary boilers during construction. The boilers will require a temporary generator, automatic transfer switch, 480-volt main distribution panel, transformer, and 208-volt panel. Temporary feeders shall be provided between the equipment and also back to a normal power source in the hospital.

9) Contractor shall comply with the VA’s required lock out/tag out procedures.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

B. Lighting

1) The lighting system within the boiler plant will be completely updated. All existing light fixtures, associated branch circuiting and switches will be demolished.

2) New pendant, surface and wall mounted lensed industrial fixtures will be provided for general lighting.

3) In the boiler plant, high-bay LED fixtures will be provided.

4) Surface mounted lensed 1’ x 4’ lighting fixtures shall be provided under the catwalk.

5) New 2’x2’ troffers will be provided in office spaces, break room, toilet and locker rooms.

6) Exit signs will be provided as required by Code, along paths of egress from the building.

7) All new light fixtures shall be 277-volt and will all be powered via the existing panels in the chiller plant. Egress lighting will be provided with an integral battery pack.

8) Operating temperature range of the new lighting fixtures will be suitable for the ambient temperatures in the boiler plant so that the lighting fixtures do not prematurely fail.

9) New switches will be provided throughout the boiler plant.

10) Occupancy sensors will be provided in office spaces, break room, toilet and locker rooms.

11) A new lightning control system will be provided to connect all of the new lighting fixtures and control devices.

C. Motor Controls

1) Heavy-duty safety switches (ratings as required) will be provided for hard-wired equipment where a local disconnecting means is required. NEMA 3R enclosures will be specified for all locations.

2) VFD’s or combination starters/disconnect switches will be provided for pumps and exhaust fans as needed.

D. Equipment Grounding, Wiring Devices, and Miscellaneous Systems

1) All receptacles within the boiler plant will be demolished. New receptacles will be provided throughout the boiler plant.

2) All non-current carrying metallic parts of the electrical distribution system will be bonded to the existing grounding electrode system or building steel.

3) An insulated grounding conductor will be run with all power feeder and branch circuits to supplement the conduit ground.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

4) All branch circuits shall be solid #12 & #10.

5) Nonflexible metallic conduit will be provided for all emergency circuits due to the need to provide redundant grounding and protection of the branch circuit.

6) A new gas protection system will be installed in the Boiler Plant. System will be tied into the fire alarm system to alert the facility in the event of an alarm condition.

7) At electrically operated roll-up doors, power will be provided.

8) See spare parts list in the specifications.

E. Communication System

1) A new lockable telecommunications enclosure shall be provided in the boiler plant office.

Enclosure shall include a fiber switch and 48-port Cat 6A patch panel as well as a power supply and UPS. Fiber source for the enclosure will likely be the existing OIT Closet 1F in the Emergency Department. Fiber shall be routed to new enclosure inside innerduct in conduit through the boiler plant.

2) New tele/data outlets will be provided as needed.

3) Category 6A cables will be provided for all new outlets. All cables should be in conduits and/or cable racks as required approved by VA COR.

5. PHYSICAL SECURITY RISK ASSESSMENT:

A. Per the September 2020 physical security risk mitigation design guidance for this project, the following Electrical/Telecom issues were addressed:

1) All electrical utilities will travel below grade (buried) per PSRDM Chapters 8 & 9. As these utilities will be traveling under future screened vehicle space.

2) All exterior access points for critical utilities are lockable per PSRDM Chapter 8.

3) All intake vents are above 30-feet elevation along the building envelope. All louvers are blast protected per PSRDM 6.6.2.

4) Electrical generators have the power capacity, as well as the fuel storage capacity, to support 96 hours of operation during a natural disaster or national emergency per PSRDM Chapters 8 & 9.

5)All underground electrical installations including low voltage shall be in an encased concrete duct as per VA Specifications.

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

ELECTRONIC SECURITY SYSTEMS (ESS) – PSRDM:

The following ESS issues will be addressed:

1) Security ESS shall be provided for the building envelope for the existing Energy Plant.

2) ESS will be implemented in numerous layers across the project scope, to include fence/gate SSTV monitoring and access control, SSTV using behavioral analytics, envelope dual-authentication PACS with anti-prop alarms, interior SSTV, interior PACS for critical spaces, and all ESS shall be capable of being interlocked together to support a future VA Station PSIM.

3) All critical operations (boilers, generators, etc.) major alarm status will be monitored by both the Control Room and the campus Security Control Center (SCC) per PSRDM Chapters 9 & 10.

4) All ESS equipment shall be powered from uninterruptible power supply (UPS) equipment, which will provide a minimum of 10 minutes of service at rated output. UPS equipment will provide power during the time of loss of normal power and the change over to the standby electrical system (generator).

ESS EQUIPMENT

Physical Access Control System (PACS)

1) There will be a future Security ESS upgrade for the hospital. Equipment provided under this Contract will need to be compatible with the VA’s future project. The new PACS equipment shall be iStar Access Controllers by Johson Controls and software shall be C-Cure 9000 by Software House.

2) The PACS for this facility will include dual-authentication card reader/keypad to provide control for each building entrance, and equipment room entrances. Doors shall be monitored/controlled by the centralized SCC.

3) The PACS system shall be able to be fully integrated with the SSTV.

4) PACS features are as follows:

• Each exterior door will be controlled by a dual-authentication card reader/keypad, electrified door hardware, contact sensor, and anti-prop alarms.

• Interior doors for the boiler room and control room will be controlled by a dual-authentication card reader/keypad, electrified door hardware, contact sensor, and anti-prop alarms.

Signage for the Boiler Plant:

- Boiler Emergency Stop Switch – Above all Emergency Stop Switch Locations

- Emergency Exit signs

- Fire Extinguisher – Locate above Fire Extinguishers

US Department of Veterans Affairs James J. Peters Bronx VA Medical Center

- Authorized Personnel Only Signs at Entrances to the Boiler Plant, Including adjacent to OH door, at Chiller Plant Entrance and at the Emergency Electrical Generator Room.

- All Visitors Must Check In with the Boiler Plant Operator On Duty. Locate at all Doors into the Boiler Plant.

- Emergency Call Telephone Number, Place several around the Boiler Plant, Emergency Electrical Generator and Outside on the exterior wall at the underground tank fueling locations.

- Emergency Shower or Emergency Eye Wash as appropriate

- Operator Control Room – Cantilevered off the Wall above the control room Entrance door and on the door to control room.

- Chilled Water Plant - Entrance to the Chilled Water Plant Door from within the Boiler

Plant

- Emergency Electrical Generator – at Door to Emergency Generator room. Also “Generator

May Start Without Warning” sign.

- Arc Flash Signage at Electrical Panels

- “Emergency Gas Shutoff” at Emergency Gas Shut-off Valve

Additionally, the following should be provided on the Wall, mounted behind Clear Lexan Protective Cover Panels.

A. As-Built One Line Drawings of Steam Plant Mechanical Piping Steam, Feedwater, Condensate, Natural Gas, Fuel Oil with Valve Tag and…