Y1DZ--659-22-405 | Install Campus Generator | Salisbury VAMC

W.G. (Bill) Hefner Department of Veterans Affairs Medical Center 1601 Brenner Avenue Salisbury, North Carolina 28144 Subject: Statement of Work: Install Campus Generators Location: Campus Project #: 659-22-405 Date: 17 November 2025 STATEMENT OF WORK Scope of Work: General: Department of Veterans Affairs has an inherent need for emergency backup power. Currently, the backup power is being provided by small temporary backups in multiple buildings along with an outdated generator that has outlived its life expectancy. The VAMC is pursuing a project to install an emergency generator station. The Period of Performance is 420 calendar days and includes a 1-year warranty on all items. The vendor has responsibility for Duty to Report any fraud, waste and abuse witnessed while on VA premises to the Integrity and Compliance Officer. Site Civil: Applicable, Code, Guidelines, and Standards: VA PG-18-3 Design and Construction Procedures State of North Carolina General Permit to Clear and Grade a Proposed Site, General NPDES Permit Number SWG030000. State of North Carolina Erosion and Sediment Control Design Manual Code of Federal Regulation (CFR) 112 Oil Pollution Prevention Spill Prevention, Control and Countermeasures Existing base map Existing field run topographic survey base mapping information is based on a CAD file entitled, 4531_Salisbury VA Topo . The existing base mapping is supplemented by topographic information based on a CAD file entitled, Department of Veterans Affairs, Salisbury, North Carolina, dated February 1993, updated October 2006. The vertical datum is based on mean sea level NAVD88. The horizontal datum is based on North Carolina State Plan Coordinate system NAD83. Aerial Imagery obtained via Google Earth Pro dated January 2021. Grading Site grading will be provided to accommodate the equipment enclosure and associated fuel delivery. Positive drainage will be directed away from the new equipment enclosure in all directions to match the existing drainage pattern. One finished floor elevation will be provided for the equipment enclosure. The fuel delivery area will be sloped in accordance with the existing drainage pattern and tie into existing grade beyond the improvements at a maximum 3:1 slope. Vehicular Circulation The proposed concrete fuel delivery area is designed to accommodate a standard AASHTO WB-65 truck template. The fuel delivery area will be surrounded by retaining wall / curb to provide containment in the event of a fuel spill. Pedestrian Circulation The new equipment building is not accessible to the public and shall be accessed by authorized maintenance staff only. An accessible sidewalk ramp is proposed at the east side of the building site. Utilities Water, sanitary and electrical improvements are required for the equipment enclosure. Sanitary sewer requirements will be met within the enclosure and no additional infrastructure is required. Water requirements will be met by providing a 6-inch waterline to the equipment enclosure for domestic service and the sprinkler system. Water service will be provided through a connection into the existing water system. Final water connection location will be determined once the sub-surface utility investigation has been completed. Electrical conduit will be rerouted to the new building connecting to the existing campus infrastructure. No impacts to existing storm or sewer lines are anticipated. Storm Sewer A storm inlet and associated storm sewer will be provided at the low point within the concrete fuel delivery pad. Fuel containment measures will be provided in the event of a spill. All other areas are expected to run off overland to the fence line at the perimeter of the site adjacent to the proposed improvements. Landscaping Stabilization measures such as sodding, and seeding are anticipated as part of this project scope. Since no trees are expected to be removed as part of this project, no new trees are proposed. Structural Applicable Codes, Guidelines, and Standards: VA PG-18-3 Design and Construction Procedures (Nov 1, 2023) VA Handbook H-18-8 VA Seismic Design Requirements for VA Hospital Facilities (July 1, 2023) VA PG-18-10 Structural Design Manual (Oct 1, 2022 Rev July 1, 2023) VA Physical Security and Resiliency Design Manual (PSRDM) (Oct 1, 2020 Rev Jan 1, 2024) 2021 International Building Code (IBC) ASCE 7-22 Minimum Design Loads for Buildings and Other Structures ACI 318-19 Building Code Requirements for Reinforced Concrete AISC 360-16 Specification for Structural Steel Buildings AISC 341-16 Seismic Provisions for Structural Steel Buildings TMS 402-16 Building Code Requirements and Specification for Masonry Structures Overview and Design Approach: The proposed building is approximately 62 x 102 x 24 tall with a 42 x 50 x 15 tall tank enclosure yard to the east. The exterior walls for the building and yard enclosure will need to be extremely high impact resistant as the generators support a critical facility. The extreme high impact loads are per the direction of the Physical Security consultant. The proposed building structure is steel framed with steel joists and wide flange girders with bare metal deck and steel columns. During the geotechnical investigation, it was found that there is a significant amount of unsuitable fill on the site, varying from 5 to 17 from top of grade. In the report, there are two potential foundation options to consider, either remove the existing fill and replace with consolidated structural fill or utilize ground improvement of aggregate piers down to natural soils with the existing fill in place. After review of costs, removal of the existing fill and replacement has been selected as the basis of design. The building and yard enclosure has been designed for the highest structural Risk Category IV per the VA Handbook H-18-8 VA Seismic Design Requirements for VA Hospital Facilities. Using Site Class C , per the Geotechnical report, this results in a Seismic Design Category C, which requires seismic bracing for all MEP components. The proposed lateral system is to use the CMU walls as non-load bearing shear walls. Design Loads: Dead Loads: Refer to calculations in appendix. Floor Live Load 150 psf Roof Live Load 20 psf Snow Load Ground Snow, pg = 31 psf (22 psf ASD) Thermal Factor, Ct = 1.2 Flat Roof Snow Load, pf = 26 psf (19 psf ASD) Minimum Flat Roof Snow Load, pm = 31 psf (22 psf) Wind Load Vult = 121 mph Tornado Load VT = 70 mph Seismic Load Site Class C Seismic Design Category C Risk Category IV (Critical Facility) Foundation and Slab on Grade: During the geotechnical investigation, it was found that there is a significant amount of unsuitable fill on the site, varying from 5 to 17 from top of grade. In the report, there are two potential foundation options to consider: Remove the existing fill and replace with consolidated structural fill, with an allowable bearing pressure of 2000 psf Utilize ground improvement of aggregate piers down to natural soils with the existing fill in place, with an allowable a bearing pressure of 6000 psf After review of costs, removal of the existing fill and replacement has been selected as the basis of design. The geotechnical testing has provided the following approximations of soil that needs to be replaced: The shallow foundations include isolated spread footings for columns and continuous strip footings for the walls to be founded at or below the frost depth of 1 -0 . Foundations have been coordinated to be below all utilities penetrating the exterior walls. An exterior perimeter foundation drain will be provided to prevent hydrostatic loading on the walls. The slab on grade will be a minimum 6 thick concrete slab reinforced with #5 at 12 o.c. each way. To prevent the translation of vibration from the generators to the rest of the structure, the generators will be supported on 4 -0 thick foundations. The exterior yard will have a washed gravel base with an elevation to match the building slab elevation. The fuel tanks will be supported on isolated saddle support foundations and associated catwalk platforms and stairs on isolated spread footings. Roof Framing: The roof framing will be approximately 30 -0 long steel joists spaced at 6 -0 o.c. maximum with a 1 1/2 metal roof deck with wide flange steel girders supported by steel columns. The steel girder over the generator bay has been designed to clear span space to avoid conflict with the generators. The steel joists have been designed to account for the snow drift created by the parapet walls and 20psf MEP hanging load. Exterior Walls The exterior walls for the building and yard enclosure will need to be extremely high impact resistant as the generators support a critical facility. The exterior reinforced CMU building walls have been analyzed and designed for the extreme high impact loads per the direction of the Physical Security consultant with a minimum 12 thickness. Where large louver openings are located, steel HSS frames are required at 4 -6 maximum to meet the requirements of the extreme high impact loads per the direction of the Physical Security consultant. Lateral Force Resisting System: The building and yard enclosure have been designed for the highest structural Risk Category IV per the VA Handbook H-18-8 VA Seismic Design Requirements for VA Hospital Facilities. Using Site Class C , per the Geotechnical report, this results in a Seismic Design Category C, which requires seismic bracing for all MEP components. The proposed lateral system is to use the CMU walls as non-load bearing shear walls. Enclosed Tank Yard The same type of wall construction as the building walls will be required around the fuel tank(s). Architectural Applicable Codes, Guidelines, and Standards: 2021 NFPA 101 Life Safety Code VA Physical Security and Resiliency Design Manual (PSRDM) 2021 International Building Code (IBC) 2021 International Existing Building Code (IEBC) Overview and Design Approach: Project scope includes construction of a new 1-story building to house emergency generators and all related infrastructure needed to operate them. The building will be approximately 6,300 square feet in area. Open air fuel tank yard will be created adjacent to the building to protect tanks per PSRDM. The yard will be approximately 2,000 square feet in area. Code Summary Industrial Use, Special Purpose Occupancy Classification: industrial occupancies that are characterized by relatively low density of employee population, with much of the area occupied by machinery or equipment. Type II (000) Construction: walls, floors, roofs, structural elements shall be of noncombustible or limited combustible materials. Building Exterior Exterior design is anticipated to follow the design aesthetic of the surrounding buildings on campus. Brick veneer with an insulated concrete masonry unit backup wall will be used for all exterior walls. Large, blast-rated louvers will be provided based on design criteria of the generator air intake and exhaust requirements. The roof will be single sloped towards the campus property line and drained with a large gutter running along the entire length of the building. Downspouts will be used to move water from the gutter to the stormwater system. Exterior enclosure will be blast-rated following the guidelines in the VA s Physical Security & Resiliency Design Manual. Design Ideas: Interior Design The interior design will be utilitarian in nature. Interior walls will be comprised of 8 concrete masonry units for durability and ease of maintenance. Exposed concrete and painted concrete masonry units will be utilized throughout. Finishes will be reviewed and selected in conjunction with VA Interior Design staff and based on durability, maintenance, and aesthetics. 5. Fire Suppression Applicable Codes, Guidelines, and Standards: VA PG-18-10 Fire Protection Design Manual, Eighth Edition VA PG-18-4 Standard Details and CAD Standards VHA Directive 1061 Prevention of Healthcare-Associated Legionella Disease and Scald Injury from Water Systems International Fire Code (IFC) National Fire Protection Association (NFPA) NFPA 13 Standard for the Installation of Fire Sprinkler Systems NFPA 20 Standard for the Installation of Stationary Pumps for Fire Protection NFPA 37 Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines NFPA 101 National Life Safety Codes The new Generator Building will be sprinkled with the new water service to be sourced from the existing water main. The existing water main will need to be relocated to avoid the new foundational footprint of the new generator building and fuel storage yard. The re-routing of the existing water main will be shown on the Civil plans, with a point of connection identified for the new connection to the building. The spaces within the Generator Building will be designated as Extra Hazard or Ordinary Hazard, Group 1, and the sprinkler heads will be standard response pendent sprinklers per the VA Wet-Pipe Sprinkler Systems specification. The standby generator room shall be protected in accordance with NFPA 37. The new fire service connection will be backflow prevented and separated from the domestic water service to support the new building. The new fire service connection shall be sized for 6 , though this connection size can be reduced if hydraulic calculations are provided to indicate that the smaller service connection will accommodate the system design. A new fire riser room will be provided to accommodate this building s service entry and the necessary valving, switches, and drains. The floor drain for the new fire riser room will be daylighted and discharged towards the south end of the new building to take advantage of the south-sloping terrain towards the property line. 6. Plumbing Applicable, Code, Guidelines, and Standards: VA PG-18-4 Standard Details and CAD Standards VA PG-18-13 Architectural Accessibility, Barrier Free Design VHA Directive 7704 Emergency Eyewash and Shower Program 2021 International Plumbing Code (IPC) American National Standards Institute ANSI/ISEA Z358.1-2014: American National Standard For Emergency Eyewash And Shower Equipment Overview and Design Approach DOMESTIC COLD-WATER A new 1 domestic cold-water service will be distributed to (2) exterior wall hydrants to provide general wash-down capability at the new generator building. This domestic water service will be sourced from the new fire service connection to accommodate the building s sprinkler system. The new domestic water service will be isolated from the fire service piping and backflow prevented at the main service entry. A self-contained emergency eyewash station will be provided in accordance with ANSI Z358.1. DOMESTIC HOT-WATER There is no anticipated requirement to provide domestic hot water to the new generator building. STORM AND CONDENSATE It is proposed that the new Generator Building will use roof scuppers to divert storm water to an adjacent bioswale area. No internally piped roof drains are anticipated with this project. Storm water within the fuel oil storage yard shall be diverted to the new storm system south of the new building. Condensate from the new DX heating/cooling equipment to serve the new Electrical Rooms will be routed outside the building. The new water service entry room will also require drains for the backflow prevention equipment and riser piping. This drain can be discharged to the building exterior in accordance with NFPA 13. SANITARY WASTE It is our preference to minimize the need for sanitary connections to serve the new Generator Building. We propose that the end runs of the new fuel oil distribution trench be provided with 12 sump depressions if the generator room needs to be de-watered. Eliminating standard floor drains from the facility will avoid the need to connect to sanitary and will mitigate problems associated with trap desiccation and fuel oil separation at each floor drain. It is also proposed that a self-contained emergency eyewash station be installed to eliminate the need for an additional sanitary drain connection. 7. Mechanical Applicable, Code, Guidelines, and Standards: VA PG-18-4 Standard Details and CAD Standards VHA Directive 1061 Prevention of Healthcare-Associated Legionella Disease and Scald Injury from Water Systems VHA Directive 7704 Emergency Eyewash and Shower Program 2021 International Mechanical Code (IMC) 2021 International Fuel Gas Code (IFGC) National Fire Protection Association (NFPA) NFPA 30 Flammable and combustible Liquids Code NFPA 31 Standard for the Installation of Oil-Burning Equipment NFPA 54 National Fuel Gas Code NFPA 101 National Life Safety Code Code of Federal Regulations 40 CFR 112 Oil Pollution Prevention Overview and Design Approach: The new emergency generator building will enclose (3) stand-alone generator units with integrated controls. Temperature will be controlled for the generators through roof mounted exhaust fans for periods when the engines are not running, and the radiator fans during engine operation. Split systems will provide temperature control for the support spaces. All new equipment will be connected to the campus central building management system through new direct digital controls. Generator Engine Exhaust The exhaust from each generator will be filtered and muffled before being discharged from the facility in accordance with the Tier 2 compliance standards for the VA campus. Hospital grade mufflers will be provided to reduce the sound output from the engines, with explosion relief valves inline with the system to prevent damaging the system. The engine exhaust will be a premanufactured double wall pre-insulated system, or, at minimum, schedule 40 carbon steel piping with 3 inches of calcium silicate insulation for thermal protection and noise lagging. Electrical Room HVAC Systems. The ATS/Switchgear Room will be heated/cooled with a DX heat pump system to maintain temperature setpoints for reliable operation. A gas detection system will be installed to monitor hydrogen gas build-up from the battery systems in the electrical room, with specialty exhaust ductwork and spark proof construction fans to remove potentially harmful gases from the environment. The Electrical Room will similarly require the installation of a DX heat pump unit to maintain the space temperature per the HVAC design manual. DX equipment is proposed since there is no readily available source of chilled/heating hot water in this area of the campus. Fuel Oil Storage and Distribution Fuel oil for the generators will be provided to store at least 96 hours of run-time fuel for (2) generators operating at full design load. Each generator will be installed with a day tank adjacent to each generator to accommodate approximately 90 minutes of full load consumption, with the rest of the fuel reserve stored in above-ground storage tanks adjacent to the new generator building. A fuel oil transfer system will be installed to distribute fuel oil from the main storage tanks to the generator day tanks in a combined loop. The fuel oil distribution loop will incorporate double-walled piping to mitigate fuel spill potential. Fuel oil will be pulled from the storage tanks through a new duplex fuel oil supply pump skid. This fuel oil will then be distributed to the generator day tanks. Each day tank will be outfitted with a dedicated return fuel oil pump to return unused fuel back to the primary storage tanks. A fuel oil polishing skid will be installed within the generator building to continuously filter/polish the fuel oil prior to delivery to the system. The generator engines will pull fuel oil from the day tanks for proper engine operation. The following items will be required to support the fuel oil distribution system: Fuel Flow (#2 Diesel): 190 GPH (3.2 GPM) per generator. Fuel oil supply and return double-wall piping. Fuel Storage (including integrated day tanks): 190 GPH x 2 operating generators x 96 hours requires 36,480 gallons. Two (2) 20,000 gallon above-grade UL142 compliant tanks are provided. Fuel polishing/filtration station to continuously polish/filter the fuel oil prior to distribution. 20 GPM fuel oil return pumps for each generator day tank to permit recycling of stagnant fuel oil. Fuel oil supply manifold to permit flow limiting (900 GPH) and flow control to each generator. Generator Airflow The basis of design generator system requires 108,000 CFM of cooling airflow per generator, along with 8,400 CFM of combustion air for continuous standby operation. Consequently, blast-rated louvers will be installed across the south and north faces of the building, with a combined approximate dimension of 56 x 16 to accommodate this airflow requirement. The generator s exhaust fans will entrain the air across the blast louver(s), filter bank, and sound attenuation assembly with control air damper systems per generator on the intake assembly for directional and isolation control. The discharge of the radiator will be connected to the recirculation and radiator discharge control system, which is made up of recirculation radiator discharge air dampers, sound attenuators, and an exhaust air louver discharge plenum. The recirculation air dampers will operate to recirculate hot radiator discharge airflow in the event the engine room requires heating while the engines run. Generator Room Temperature Control When the generators are not operating, the space temperature of the generator area will be maintained with (2) roof-mounted exhaust fans. These fans shall be energized when the generator space temperature rises above 85 deg F (adj.). The generator area of the building maximum temperature must be maintained at or below 104 deg F. The summer design temperature for Salisbury, NC is 93 deg. F. The new exhaust fans will be sized to provide 10 ACH at the occupant zone (