81 Exhibit F_MEP Basis of Design Narrative.pdf

EXHIBIT F

LPOE HOULTON

GSA

CONCEPT DESIGN DEVELOPMENT BASIS OF DESIGN NARRATIVE

CUI

PROJECT NO.: B23.05092

DATE: JULY 19, 2024

WSP

ONE PENN PLAZA

250 WEST 34TH STREET, 2ND FLOOR

NEW YORK, NY 10119

TEL.: +1 212 465-5000

FAX: +1 212 465-5096

WSP.COM

Project No. B23.05092

GSA

WSP

July 19, 2024

Page iii

TABLE OF

CONTENTS

1 DESIGN APPROACH

1.1 General Mechanical, Electrical, Plumbing, Fire Alarm

and Fire Protection Narrative

1.1.1 Applicable Codes

1.1.2 Site Utilities

1.2 Mechanical Narrative

1.2.1 Base Bid Design Approach

1.2.2 Mechanical Performance Tier Design - Baseline

1.2.3 Base Bid

1.2.4 Bid Option 1

1.2.5 Bid Option 2

1.2.6 Bid Option 3

1.3 Electrical Narrative

1.3.1 Base Bid Design Approach

1.3.2 Bid Option 1

1.3.3 Bid Option 2

1.3.4 Bid Option 3

1.4 Plumbing Narrative

1.4.1 Base Bid Design Approach

1.4.2 Bid Option 1

1.4.3 Bid Option 2

1.4.4 Bid Option 3

1.5 Fire Alarm and Fire Protection Narrative

1.5.1 Base Bid Design Approach

1.5.2 Bid Option 1

1.5.3 Bid Option 2

1.5.4 Bid Option 3

Project No. B23.05092

GSA

WSP

July 19, 2024

1 DESIGN APPROACH

1.1 GENERAL MECHANICAL, ELECTRICAL, PLUMBING, FIRE

ALARM AND FIRE PROTECTION NARRATIVE

1.1.1 APPLICABLE CODES

The MEP/FP design approach for the proposed new Land Port of Entry will comply with required codes, regulations and standards, including but not limited to:

• International Building Code

• International Mechanical Code

• International Plumbing Code

• ASHRAE 90.1-2019 Energy Standard for Buildings Except Low Rise Residential. Specifically, Appendix G – Building Performance Rating Method

• ASHRAE 62.1-2019 Ventilation for Acceptable Indoor Air Quality

• ASHRAE Standard 55-Thermal Environmental Conditions for Human Occupancy

• IEEE: Institute of Electrical and Electronics Engineers

• IES: Illuminating Engineering Society of North America

• NEMA: National Electrical Manufacturers Association

• NETA: International Electrical Testing Association

• NFPA: National Fire Protection Association

• UL: Underwriter’s Laboratories

• Current local and state codes will be followed to the extent practicable.

• Utility provider requirements will be incorporated into the design where applicable

• LPOE Design Guide 2018

• P100 Standards 2022

1.1.2 SITE UTILITIES

The architectural concept includes separate site buildings. The multiple buildings on site have their utility connections fed from a single connection point in the main building and routed underground across the campus. Potential building specific utilities would include, but not limited to, propane, hot water systems, fire protection systems, electrical. The site condition has been reported as having a deep frost line that can penetrate as dep as 9 feet below grade or more. As a result, any site pipe utilities (e.g. water service) would need to be studied for preferred routing technique and burial depth. Existing water main service shall be buried below the frost line, refer to Bid Option 1.

Project No. B23.05092.

GSA

WSP

July 19, 2024

1.2 MECHANICAL NARRATIVE

1.2.1 BASE BID DESIGN APPROACH

The mechanical design will be studied, and design options will be developed in order to meet the indoor design conditions as required by the P100 and LPOE Design Standard while taking into account the outdoor design conditions and energy efficiency. The HVAC system will be designed with the goal of providing a minimum thirty percent reduction of energy consumption versus the standard ASHRAE Baseline Building. In compliance with several LEED prerequisites and credits, the HVAC systems will attempt to provide energy metering, enhanced refrigerant management, and enhanced outside air levels.

1.2.2 MECHANICAL DESIGN PARAMETERS

1.1 Outdoor ASHRAE Design Criteria

A. Outdoor Design Conditions per ASHRAE

1. Winter: -14°F Dry Bulb Temperature

2. Summer Dry Bulb: …. 82°F Dry Bulb Temperature

3. Summer Wet Bulb: …….. 67°F Wet Bulb Temperature

1.2 Indoor Design Criteria

A. See Appendix A

1.3 Dew Point Analysis

A. See Appendix B

1.2.3 MECHANICAL PERFORMANCE TIER DESIGN - BASELINE

The HVAC systems & equipment will be capable of maintaining a space temperature of 75 deg. F with 55 deg. F dew point for cooling and 72 deg. F for heating for all occupied spaces in compliance with baseline temperature and humidity performance. Thermal zones will be limited to no more than three private offices or exterior zones.

The air distribution system will be designed for low velocity application with the air outlets adequately sized for supplying air to the space at a velocity of 40 fpm or less at the occupied level in compliance with baseline air movement performance.

Perimeter spaces will be maintained at a positive pressure with respect to outdoor in compliance with baseline pressure performance. The restrooms, janitor closets and other spaces per LPOE design guide will be negative pressure respect to adjacent spaces for moisture and odor management.

Airflow measuring stations will be provided for all vav air handling units. Outdoor air ventilation rates to all occupied spaces will comply with the ASHRAE 62.1 ventilation rates to meet baseline performance.

Pleated MERV 8 prefilters, and bag MERV 13 final filters will be provided for all air handling units. UV Lights for all air handling unit cooling coils, in compliance with filtration baseline performance.

HVAC noise control will meet ASHRAE Applications Chapter 48, table 1 in compliance with noise control baseline performance.

HVAC operational efficiency will meet ASHRAE 90.1 and IGCC 701.5 efficiencies in compliance with HVAC operational efficiency Tier 2 performance.

HVAC fan energy performance will meet five percent below ASHRAE 90.1 efficiencies in compliance with HVAC fan energy Tier 1 performance.

HVAC energy metering will be provided on all major HVAC systems including electrical power and hot water BTU metering in compliance with HVAC energy metering Tier 1 performance.

Whole building metering will be provided on all major utilities in compliance with whole building metering baseline performance.

GSA

WSP

July 19, 2024

1.2.4 BASE BID

MAIN PORT BUILDING - MECHANICAL SYSTEMS

DESIGN OPTION 1 – AIR SOURCE HEAT PUMP

COOLING & PRIMARY HEATING

Cooling and heating will be provided by one (1) 91-ton, 4-pipe simultaneous air-source heat pump with three (3) modules located on the roof. The 4-pipe configuration will provide simultaneous hot water and chilled water for the Main Port building and Vehicle Inspection Bay. The heat pump will be provided with a louvered enclosure to mitigate snow accumulation and provide maintenance access during winter months.

Chilled water will be pumped via two (1 operating, 1 standby) variable speed chilled water pumps, each sized for 144 GPM and will distribute chilled water to the building. The speed of the chilled water pumps will be controlled based on the pressure differential between the chilled water supply and return piping.

Heating hot water will be pumped via two (1 operating, 1 standby) variable speed hot water heating pumps, each sized for 70 GPM and will distribute heating hot water to the building to serve the DOAS, central station AHUs and perimeter fin tube radiators. The speed of the heating hot water pumps will be controlled based on the pressure differential between the heating hot water supply and return piping. Air source heat pump technology for heating currently has limitations to the heating capacity for ambient temperatures below 0 degrees F so backup heating sources will also be provided for this option.

BACKUP HEATING

When ambient temperatures drop below 0 degrees F, the backup hot water heating system will be enabled. Two options are currently being evaluated for the backup heating hot water system. These proposed boilers and pumps will be located in the Main Port Mechanical Room on the Ground Floor.

1. Electric Resistance Boilers – Heating hot water will be generated via two (1 operating, 1 standby) 798 MBH electric resistance boilers and will be pumped via two (1 operating, 1 standby) variable speed hot water heating pumps, each sized for 70 GPM and will distribute heating hot water to the building.

2. Propane fired boilers - Heating hot water will be generated via two (1 operating, 1 standby) 750 MBH propane fired boilers and will be pumped via two (1 operating, 1 standby) variable speed hot water heating pumps, each sized for 70 GPM and will distribute heating hot water to the building. Propane tanks will be located outside the building as close to the mechanical room as possible. Another option is to reuse the existing underground fuel storage tanks if they are in good condition and correct capacity. The feasibility will be dependent on a forthcoming existing conditions site survey.

The exact fuel source will be studied as the design progresses based upon available power from the utility provider and client preference.

AIR CONDITIONING SYSTEMS

An overhead ducted air system will be provided to serve the Main Port Building. Two (2) central station Air Handling Units (AHUs) will be provided, one will be located on each level of the Main Port Building.

The AHUs will serve as single zone variable volume systems. Preheat, cooling and reheat water coils will be provided in the units. Controls will be provided to only use air economizer when it makes sense from a heat recovery standpoint.

Level 1 will be served by (1) 13,400 CFM AHU and Level 2 will be served by (1) 8,300 CFM AHU.

The Vehicle Inspection Bay will be served by heating and ventilation units to provide required airflow in the space.

SUPPLEMENTAL AIR CONDITIONING SYSTEMS

Specialized rooms including Telecom, LAN, elevator machine rooms, etc. will be provided with dedicated year-round cooling-only fan coil units. Each individual space will have its own system to ensure that any equipment failure will only affect a single space. Additional emergency provisions will be provided to allow for a heat release from these spaces.

GSA

WSP

July 19, 2024

VENTILATION AIR SYSTEMS

Fresh air for the building will be provided by a 2,550 CFM dedicated outside air handling unit (DOAS). The DOAS will be ducted to the central station AHUs to deliver fresh air to the building.

Fresh air intake will be located on the level 2 roof, high enough above the roof to avoid snow accumulation. A P100 wavier will be submitted as directed in RFI-012.

EXHAUST AIR SYSTEMS (SAME FOR ALL OPTIONS)

A central toilet exhaust system will be provided for the Main Port building with discharge to the roof level, located a minimum of 10 feet from any fresh air intake.

A central general exhaust system will be provided for building pressurization for the Main Port building with discharge to the roof level, located a minimum of 10 feet from any fresh air intake.

DESIGN OPTION 2 - VRF

COOLING & PRIMARY HEATING

Cooling and heating will be provided by a variable refrigerant flow (VRF) system which can provide simultaneous cooling and heating any time of year by transferring heat from one zone to another or rejecting it outside the building via refrigerant piping. In heating mode, the outdoor wet bulb temperature can be as low as -13 degrees F and as high as 60 degrees F. In cooling mode, the outdoor dry bulb temperature can be as low as 23 degrees F and as high as 115 degrees F. A backup heat source will be provided for when ambient temperatures drop below - 13 degrees F.

Horizontal ducted indoor VRF fan coil units will be provided local to the space that it serves. Multiple indoor units are connected to an outdoor VRF condensing unit for heat dissipation. Three (3) 16-ton cooling / 215 MBH heating outdoor VRF units are provided for the 27 (1-3 ton) indoor units and will be located on the roof. The VRF units will be provided with a louvered enclosure to mitigate snow accumulation and provide maintenance access during winter months. Two (2) 11.6-ton outdoor VRF units are provided for the (2) 4.4 ton DOAS VRF units located inside the building.

BACKUP HEATING (SAME FOR ALL OPTIONS)

When ambient temperatures drop below -13 degrees F, the backup hot water heating system will be enabled. Two options are currently being evaluated for the backup heating hot water system. These proposed boilers and pumps will be located in the Main Port Mechanical Room on the Ground Floor.

1. Electric Resistance Boilers – Heating hot water will be generated via two (1 operating, 1 standby) 798 MBH electric resistance boilers and will be pumped via two (1 operating, 1 standby) variable speed hot water heating pumps, each sized for 70 GPM and will distribute heating hot water to the building.

2. Propane fired boilers - Heating hot water will be generated via two (1 operating, 1 standby) 750 MBH propane fired boilers and will be pumped via two (1 operating, 1 standby) variable speed hot water heating pumps, each sized for 70 GPM and will distribute heating hot water to the building. Propane tanks will be located outside the building as close to the mechanical room as possible. Another option is to reuse the existing underground fuel storage tanks if they are in good condition and correct capacity. The feasibility will be dependent on a forthcoming existing conditions site survey.

The exact fuel source will be studied as the design progresses based upon available power from the utility provider and client preference.

SUPPLEMENTAL AIR CONDITIONING SYSTEMS

Specialized rooms including Telecom, LAN, elevator machine rooms, etc. will be provided with dedicated year-round cooling-only VRF fan coil units. Each individual space will have its own system to ensure that any equipment failure will only affect a single space. Additional emergency provisions will be provided to allow for a heat release from these spaces.

GSA

WSP

July 19, 2024

VENTILATION AIR SYSTEMS

Fresh air for the building will be provided by (2) 4.4-ton DOAS VRF units. The DOAS will be ducted to the indoor VRF units to deliver fresh air to the building.

Fresh air intake will be located on the level 2 roof, high enough above the roof to avoid snow accumulation. A P100 wavier will be submitted as directed in RFI-012.

EXHAUST AIR SYSTEMS (SAME FOR ALL OPTIONS)

A central toilet exhaust system will be provided for the Main Port building with discharge to the roof level, located a minimum of 10 feet from any fresh air intake.

A central general exhaust system will be provided for building pressurization for the Main Port building with discharge to the roof level, located a minimum of 10 feet from any fresh air intake.

DESIGN OPTION 3 - GEOTHERMAL

COOLING & PRIMARY HEATING

Cooling and heating will be provided by one (1) 68-ton, 4-pipe ground-source, water-to-water heat pumps located in the mechanical room on the ground floor. The 4-pipe configuration will provide simultaneous hot water and chilled water for the Main Port building and Vehicle Inspection Bay.

Chilled water will be pumped via two (1 operating, 1 standby) variable speed chilled water pumps, each sized for 144 GPM and will distribute chilled water to the building. The speed of the chilled water pumps will be controlled based on the pressure differential between the chilled water supply and return piping.

Heating hot water will be pumped via two (1 operating, 1 standby) variable speed hot water heating pumps, each sized for 70 GPM and will distribute heating hot water to the building to serve the DOAS, indoor heat pumps and perimeter fin tube radiators. The speed of the heating hot water pumps will be controlled based on the pressure differential between the heating hot water supply and return piping. Ground source heat pump technology for heating currently has limitations to the heating capacity so backup heating sources will also be provided for this option.

If this option is selected, specifications will dictate that a technician within an acceptable distance to GSA is provided. These requirements can be developed further as the design options progress.

BACKUP HEATING (SAME FOR ALL OPTIONS)

When ground source temperatures drop below 32 degrees F, the backup hot water heating system will be enabled. Two options are currently being evaluated for the backup heating hot water system. These proposed boilers and pumps will be located in the Main Port Mechanical Room on the Ground Floor.

1. Electric Resistance Boilers – Heating hot water will be generated via two (1 operating, 1 standby) 798 MBH electric resistance boilers and will be pumped via two (1 operating, 1 standby) variable speed hot water heating pumps, each sized for 70 GPM and will distribute heating hot water to the building.

2. Propane fired boilers - Heating hot water will be generated via two (1 operating, 1 standby) 750 MBH propane fired boilers and will be pumped via two (1 operating, 1 standby) variable speed hot water heating pumps, each sized for 70 GPM and will distribute heating hot water to the building. Propane tanks will be located outside the building as close to the mechanical room as possible. Another option is to reuse the existing underground fuel storage tanks if they are in good condition and correct capacity. The feasibility will be dependent on a forthcoming existing conditions site survey.

The exact fuel source will be studied as the design progresses based upon available power from the utility provider and client preference.

AIR CONDITIONING SYSTEMS

Horizontal ducted indoor fan coil units will be provided local to the space that it serves. The 27 (1-3 ton) indoor FCUs are fed from the building chilled and heating hot water system generated by the ground source heat pump.

GSA

WSP

July 19, 2024

SUPPLEMENTAL AIR CONDITIONING SYSTEMS

Specialized rooms including Telecom, LAN, elevator machine rooms, etc. will be provided with dedicated year-round cooling-only indoor fan coil units. Each individual space will have its own system to ensure that any equipment failure will only affect a single space. Additional emergency provisions will be provided to allow for a heat release from these spaces.

VENTILATION AIR SYSTEMS

Fresh air for the building will be provided by (2) 4.4-ton DOAS units. The DOAS will be ducted to the indoor FCUs to deliver fresh air to the building.

Fresh air intake will be located on the level 2 roof, high enough above the roof to avoid snow accumulation. A P100 wavier will be submitted as directed in RFI-012.

EXHAUST AIR SYSTEMS (SAME FOR ALL OPTIONS)

A central toilet exhaust system will be provided for the Main Port building with discharge to the roof level, located a minimum of 10 feet from any fresh air intake.

A central general exhaust system will be provided for building pressurization for the Main Port building with discharge to the roof level, located a minimum of 10 feet from any fresh air intake.

BUILDING AUTOMATION SYSTEM (BAS)

DESIGN OPTIONS 1, 2 & 3

A new building automation system (BAS) will be provided for the building in compliance with the GSA Smart Building, Data Normalization, Building Technology and Regional Graphics requirements. This system will be designed in accordance with all GSA network requirements. The system design will be free from proprietary equipment and protocols as required by GSA.

The system will be capable of GSA Link (Sky Spark) and will be a Niagara System

The BAS system will be utilized to control mechanical systems and also to monitor status of other major systems. The BAS system will be in compliance with the standards of PBS P100, GSA’s standardized National Computerized Maintenance Management System (NCMMS), and Construction Operations Building Information Exchange (COBie) format and will be provided with all required control points including, but not limited to points to tie into the fire alarm system for required HVAC points, water metering, energy metering, lighting control, etc. The system will be fully integrated with the various systems and monitoring devices within the facility.

FDA/ GSA/ APHIS BUILDING - MECHANICAL SYSTEMS

There is no scope for FDA/GSA/APHIS Building base bid.

COMMERCIAL INSPECTION BUILDING - MECHANICAL SYSTEMS

There is no scope for CIB base bid.

1.2.5 BID OPTION 1

There is no mechanical scope included in Bid Option 1.

1.2.6 BID OPTION 2

There is no mechanical scope included in Bid Option 2.

GSA

WSP

July 19, 2024

1.2.7 BID OPTION 3

• There is no mechanical scope for Bid Option 3 FDA/GSA/APHIS Building

• There is no scope for Bid Option 3 Commercial Inspection Building.

1.2.8 MECHANICAL SYSTEM COMPARISON

Below is a table detailing each options benefits/drawbacks and an overall system comparison based on several factors involved in system design and maintenance.

System Pros Cons

Option 1 - Air Source Heat Pump Chiller, Indoor Air Handlers with Fan Coils

• Less Equipment

• Simple operation

• Energy efficient

• Heat Rejection Equipment located inside

• Additional water piping located throughout building

• Large Equipment, difficult replacement

• Large ductwork runs through building (tight plenums)

Option 2 -

VRF

• Minimal Operational Cost

• Relatively simple operation

• Spatially efficient

• Energy efficient

• Minimal impact on schedule

• Heat Rejection Equipment located inside

• Large ductwork runs with run through building

• Shorter equipment lifespan

• Higher minimum operating temperature, requires backup heating system for more of the year.

Option 3 - Geothermal Heat Pump and Indoor 4-Pipe Fan Coils

• Low operational cost

• Very energy efficient

• Minimal outdoor maintenance

• Significant upfront cost

• Significant lead time

• Significant site impact

• Requires more detailed survey for well locations by others

• Complex maintenance of systems

• Requires significant interior mechanical room space

GSA

WSP

July 19, 2024

Design Option Score

Initial Cost (Estimated)

Energy Efficiency

Maintenance Operational

Cost Operational Complexity

Space Requirements

Impact on Schedule

% of Total 15.0% 10.0% 15.0% 15.0% 15.0% 15.0% 15.0%

Option 1:

ASHP, FCU,

AHUs 4 4 4 4 4 5 3 4

Option 2: VRF 3.85 4 4 3 4 4 4 4

Option 3:

WSHPs, Geofield, FCU

2.75 1 5 5 4 2 2 1

Rating Scale 1 to 5 – 1 Least Favorable to 5 Most Favorable

1.3 ELECTRICAL NARRATIVE

1.3.1 BASE BID DESIGN APPROACH

The electrical systems will be designed in coordination with the local utility to meet the requirements of Land Port of Entry, (LPOE), and provide adequate capacity to meet the mechanical, plumbing, IT, and other load requirements of each building on the site. The utility service connection and new utility transformer will be sized to provide the calculated site demand load, plus and addition 50% for future site expansion. While not within the scope of this contract, it is our recommendation as a best practice to include an estimated load allowance for all known future site loads where such future loads can be advised by GSA/CBP.

The existing utility transformer is insufficiently rated to serve the new estimated site load and will be removed and replaced with an adequately rated transformer. The new transformer is proposed to be a submersible type of transformer, located adjacent to the last overhead utility cable pole as the existing transformer location clashes with a planned site expansion project. To accommodate the new transformer a new transformer vault and pad will be required to be constructed, and a new trenched service cable route from the transformer to the site main electrical room is also required.

The incoming service is anticipated to be rated for 1500kVA at 208/120V, 3-phase, 4 wire, 60 Hz, terminating at new 4000A rated main switchboard in the main port building. The new switchboard will feed (3) ATS for NEC 700, 701 and 702 loads. All the existing local distribution boards from each individual building will be fed from a new 2000-amp switchboard that will be fed from the NEC 702 ATS. For the 700 and 701 loads, each building will be provided with (2) new 100-amp power panels. One 100-amp panel will be for the 700 loads and the other 100-amp panel shall be for the 701 loads. All cross-building feeders will be 208/120V and sized to mitigate voltage drop at the anticipated design load.

Individual branch circuit panelboards will be provided in electrical closets within each building. All lighting and large HVAC loads will be supplied directly at 208/120V, with each panel serving approximately 30,000 square feet. Other loads such as receptacles, small HVAC, and IT equipment will also be supplied at 208/120V via panelboards. Each 208/120V receptacle panelboard will serve roughly 10,000 square feet. All existing 208V rated panels that are being retained and reused will have feeder cable routes reused where feasible.

The existing site main electrical room will have the existing switchgear and generator removed and the existing vestibule demolished to expand the area for the 2 new electrical rooms. The expanded rooms size is required to accommodate the new service switchboards and distribution equipment. A 2-hour fire rated room for the new automatic transfer switches, (ATS’s), will be formed within the electrical room if there is sufficient space (Refer to the Mechanical-Electrical Resiliency package for options), otherwise the ATS room will be located at a different location. Note, per pre-construction RFI 0023 response on 7/11/24, the electrical main switchboard and electrical room layout will likely change and increase in size, however, within the existing building footprint. This is

GSA

WSP

July 19, 2024 currently being coordinated and will be incorporated in the next submission. A cost allowance shall be provided for this change as part of the estimate.

Due to the new utility transformer and the change in service conductor size, quantity, and length, the fault current rating of all new and existing electrical equipment will need to be assessed to ensure safe operation and replaced if necessary.

All panel bussing and conductors will be copper. Aluminum bussing and conductors will not be used unless specifically requested by GSA/CBP. All conductors will be run in conduit except for final connections to mechanical equipment, lighting, and similar loads. All conduit run above grade will be metallic; RMC will be used where conduit may be subject to physical impact, and EMT will be used in all other above-grade locations. All underground conduit will be Schedule 40 PVC in concrete duct banks. Buried cable routes will as a minimum be buried at the depths stipulated by NFPA 70 but may need to be buried at a greater depth to be below the site frost line if required by GSA/CBP.

All panelboards serving IT, security, and other sensitive equipment will be provided with 200% neutral conductors and internally mounted surge protection devices fed from a circuit breaker within the panel.

All new interior and exterior lighting will be LED, with interior dimming and automatic control included as appropriate. A dimming system compliant with the P100 and energy code requirements will be provided.

Adequate spare capacity and working/dedicated electrical space will be provided in each location as per GSA P100, LPOE standard, and NFPA 70 requirements. Transformers and panelboards serving electrical distribution will be provided as per GSA P100 and LPOE standard requirements and latest industry standards.

A CBP critical systems UPS, ATS, and associated distribution equipment will be provided to supply back up power to critical systems in the event of an outage. The emergency power system consists of the site generator and the new UPS system which will combine to serve all CBP defined essential and critical systems in addition to all NEC Article 700 life safety loads and Article 701 legally required standby loads. The UPS will be designed to provide 1 hour of power to defined critical loads which will include but are not limited to: CBP designated computer systems, LAN Equipment, Lighting, Security System Controls, CCTV cameras, and HSDN Equipment.

The overall hot water system is going to be replaced with new electric hot water heaters and associated hot water storage tanks with circulating pumps as the base option. Option 1 for the hot water heaters is air-source heat pump water heaters.

A new lightning protection system will be provided for the Main Port building. The system will be designed to be compliant with NFPA 780 and UL 96 Master Label requirements. The system will be comprised of a roof mounted air termination network, copper cable down conductors that link the air termination network to the grounding electrode, and a buried grounding electrode that will also be bonded with the electrical ground connection.

New electric vehicle, (EV), charging stations will be added to the Main Port building parking area. It is anticipated that two dual level- 2 EV chargers (or four singular level-2 EV chargers) will be added to the visitor parking area for use by CBP staff. Empty conduits for future visitor EV charging stations will also be installed. Final quantity and type of chargers is to be confirmed by GSA/CBP. The EV chargers will each be fed from a dedicated 208V 2-pole circuit that originates from a distribution panel within the Main Port building.

Circuit routes will be trenched from the Main Port building to the charger locations and provided with a local disconnect switch.

1.3.2 BID OPTION 1

There is no electrical scope included in Bid Option 1.

1.3.3 BID OPTION 2

As an optional scope item, a new on-site diesel engine generator system is proposed to support these facilities loads. The two options for the new generator system are to provide either a single genset rated for 150% of the calculated demand load, or two generators, both rated for 150% of the calculated demand load in an N+1 arrangement. The option for two generators would require the addition of a paralleling switchgear in a new electrical room. To make room for 2 generators, the shed outside of the CBP building will need to be relocated. In either generator option, the paralleling switchgear or generator switchboard will require (3) dedicated individual feeders to feed 700, 701, & 702 loads via automatic transfer switches (ATS’s). The ATS’s will be located in a

GSA

WSP

July 19, 2024 dedicated 2-hour fire rated room adjacent to the existing main electrical room in the Main Port Building. In the event that N+1 generators are required, a additional room for the paralleling switchgear room will be required.

The anticipated rating of each generator is 1500kVA at 208/120V, 3 phase, 4 wire, 60 Hz. The generators will be within a dedicated walk-in enclosure. The generator enclosure/room will be acoustical treated and will be heated to prevent the engine from freezing.

As the generators are anticipated to be larger than 350kW each, diesel fuel will be utilized for the generators with a minimum storage capacity of 4 days of fuel.

The emergency generator shall be provided with a walk-in enclosure, and it would be located in the landscaped area behind the CBP building. This option would require a new buried service route from the generator enclosure to the main port building electrical room, but the buried route would not cross the main vehicle routes which would minimize construction disruption to the site operation. The containerized option would also allow for the generator to be raised up above flood water level on a supporting structure if required.

It is recommended that at a minimum one generator is installed to support the site essential and critical loads. The existing generator is too small to feed the new calculated site load and is also approaching the end of its expected useful life span. The existing generator must be moved from its present location to allow for installation of the new main switchgear; this work is not an optional scope item. If the existing generator is not replaced with new, then a new space must be created for it to be installed in and the electrical and fuel connections to the generator must also be moved to connect the generator to the existing infrastructure.

1.3.4 BID OPTION 4

Bid option 3 would include the replacement of the fire alarm system and devices within the FDA, GSA, APHIS, and Commercial Inspection buildings. The new fire alarm devices and loop cabling would be connected to the main port building fire alarm system using existing or new buried service routes.

1.4 PLUMBING NARRATIVE

1.4.1 BASE BID DESIGN APPROACH

MAIN PORT BUILDING – PLUMBING SYSTEM

The plumbing systems will be designed in coordination with the local utilities to meet the Land Port of Entry (LPOE) and local Plumbing Code and Building Code requirements.

Existing building is supplied with domestic water from local utility at a pressure of 84 Psi. The water supply shall be replaced with new at an increased depth (below frostline) to ensure the service does not freeze during winter months. Water isolation valves will be replaced/provided to all buildings and additional isolation valves will be provided throughout the buildings to make repairs simpler. A domestic water booster pump will not be required.

New electric water heaters with associated hot water storage and circulating pumps will be provided for the main port building.

Options for hot water generation in lieu of electricity include propane-fired water heaters and air source heat pump water heaters.

All cold water, hot water and hot water return piping will be insulated to be incompliance with local plumbing and energy codes.

All existing plumbing fixtures shall be replaced with new low flow fixtures in compliance with PBS P100 fixture requirements. Parts of the existing sanitary system serving the fixtures may need to be replaced to accommodate the decrease in flow fixture flow rate and to ensure proper pipe pitch to allow the system to function.

Roof drains shall be replaced with new and will be coordinated with new roofing system. All roof drains will be heat traced and all horizontal storm piping will be insulated.

GSA

WSP

July 19, 2024

1.4.2 BASE BID DESIGN APPROACH

MAIN PORT BUILDING – PLUMBING CALCULATIONS

DOMESTIC WATER LOAD

Fixture Type COUNT WSFU Value LOAD VALUES IN WATER SUPPLY FIXTURE UNITS (wsfu)

WC 9 10 90

UR 2 10 20

LAV 9 2 18

HB 2 2 4

PSK 4 4 16

SS 1 3 3

DF 1 0.25 0.25

WSFU TOTAL 151.25

o Water Velocity- 4 ft/sec o Presumed Friction: 3 psi/100 ft o Anticipated GPM Demand: 79 GPM (IPC Table E103.3(3) to convert to GPM)

DOMESTIC HOT WATER LOAD

Fixture Type COUNT WSFU Value LOAD VALUES IN WATER SUPPLY FIXTURE UNITS (wsfu)

LAV 9 2 18

PSK 4 4 16

SS 1 3 3

WSFU TOTAL 37

o Water Velocity- 4 ft/sec o Presumed Friction: 3 psi/100 ft o Anticipated GPM Demand: 44 GPM (IPC Table E103.3(3) to convert to GPM)

DOMESTIC HOT WATER HEATER CALCULATIONS

Fixture Type Count GPH Total

GPH

Demand Factor

Demand

(GPH)

Storage Factor Storage (GALLONS)

LAV 9 6 54 0.3 16.2 2 32.4

MS/SS 1 20 20 0.3 6 2 12

PSK 4 10 40 0.3 12 2 24

GALLONS TOTAL - - - - 34.2 - 68.4

GSA

WSP

July 19, 2024

1.4.3 BID OPTION 1

There is no plumbing scope included in Bid Option 1.

1.4.4 BID OPTION 2

There is no plumbing scope included in Bid Option 2.

1.4.5 BID OPTION 3

There is no plumbing scope included in Bid Option 3.

1.5 FIRE ALARM AND FIRE PROTECTION NARRATIVE

1.5.1 BASE BID DESIGN APPROACH

MAIN PORT BUILDING – FIRE PROTECTION SYSTEM

The main port building does not currently have an existing sprinkler system. For this building a new sprinkler system will be added in compliance with NFPA 13 and local fire protection codes. Sprinkler water will be supplied by local utility at a pressure of 84 psi, a sprinkler water tank and pump will not be required. Sprinkler water piping from the utility will run underground (below frost line) to the main port building. A local DCDA will be provided in each building.

The existing fire alarm systems within the main port building will be removed and replaced with a new addressable, combined fire alarm and voice emergency system. The new fire alarm system will also interface with the planned new BAS.

All existing fire alarm detection devices, notification devices, and system cabling will be replaced with new and reconfigured to suit the new architectural layouts and MEP systems.

Existing fire alarm devices in site buildings not within the scope of this project will require new interface devices to allow the existing devices to be connected to the new main fire alarm system.

1.5.2 BID OPTION 1

There is no fire alarm and protection scope included in Bid Option 1.

1.5.3 BID OPTION 2

There is no fire alarm and protection scope included in Bid Option 2.

1.5.4 BID OPTION 4

FDA/GSA/APHIS/COMMERCIAL INSPECTION BUILDINGS – FIRE PROTECTION SYSTEM

Several existing buildings do not currently have an existing sprinkler system. For these buildings a new sprinkler system will be added in compliance with NFPA 13 and local fire protection codes. Sprinkler water will be supplied by local utility at a pressure of 84 Psi. s sprinkler water tank and pump are not required. Sprinkler water piping from the utility will run underground (below frost line) to each building that is currently not sprinklered. A local DCDA (double check detector assembly) will be provided in each building.

The FDA/GSA/APHIS building currently has a sprinkler system that will need to be upgraded to be in compliance with NFPA 13 standards.

GSA

WSP

July 19, 2024

The existing fire alarm systems within the FDA/GSA/APHIS Building and Commercial Inspection Building will be removed and replaced with a new addressable, combined fire alarm and voice emergency system. The new fire alarm system will also interface with the planned new BAS.

All existing fire alarm detection devices, notification devices, and system cabling will be replaced with new and reconfigured to suit the new architectural layouts and MEP systems.

Existing fire alarm devices in site buildings not within the scope of this project will require new interface devices to allow the existing devices to be connected to the new main fire alarm system.

GSA

WSP

July 19, 2024

APPENDIX A: INDOOR DESIGN CRITERIA

Type of Area

Summer

Temperature

(deg F)

Winter

Temperature

(deg F)

Humidity Ventilation Pressurization

Vestibule 90 55 30%-60% ASHRAE N/A

Waiting Area 75 72 30%-60% ASHRAE Negative to non-public

Counter Staff 75 72 30%-60% ASHRAE N/A

Inspection 75 72 30%-60% ASHRAE N/A

Corridor 75 72 30%-60% ASHRAE N/A

Enforce Workstation 75 72 30%-60% ASHRAE N/A

Holding 75 72 30%-60%

10 Air

Changes per Hour

Negative, 100% Exhaust

Office (GSA) 75 72 30%-60% ASHRAE N/A

Port Director 75 72 30%-60% ASHRAE N/A

Custodial Office 75 72 30%-60% ASHRAE N/A

Conference 75 72 30%-60% ASHRAE N/A

Storage 75 72 30%-60% ASHRAE N/A

Break Room 75 72 30%-60% ASHRAE N/A

Female Restroom 75 72 N/A

10 Air

Changes per Hour

Negative, 100% Exhaust

Male Restroom 75 72 N/A

10 Air

Changes per Hour

Negative, 100% Exhaust

Janitor Closet 75 72 30%-60%

10 Air

Changes per Hour

Negative, 100% Exhaust

Electrical 95 55 N/A N/A Negative

UPS 95 55 N/A N/A N/A

Emergency Generator 95 55 N/A N/A Negative

Fire Protection 75 72 N/A N/A N/A

Mechanical 75 72 50%-60% Filtered

Exhaust Negative

Enclosed Government

Parking 85 65 N/A 0.75 cfm/sf N/A

Enclosed Secondary

Inspection 85 65 N/A 0.75 cfm/sf N/A

GSA

WSP

July 19, 2024

GSA

WSP

July 19, 2024

APPENDIX B: DEW POINT ANALYSIS