2024-03-28_CEC Garland_CombinedReport.pdf

New Central Utility Plant Study

117 Pierce Street, Sioux City, Iowa 51101 Office: 712-252-4014

Garland VA Health Care System | Garland, Texas

8822 S. Ridgeline Blvd, Ste 310, Highlands Ranch, CO 80129 Office: 303-730-0434

12700 West Dodge Road, Omaha, NE 68154 Office: 402-330-5900

1197 Farnsworth Rd, Unit E PO Box 283, Waterville, OH 43566 Office: 567-952-0212

New Utility Plant Study

Table of Contents

New Central Utility Plant Study-Garland Va

Contents

M+Stone/HFG Architecture

• Design Narrative

• Architectural Concept

• Site Pre-Design

• 1st Level Floor Plan

• Roof Plan

• Elevations

Calibre Civil & Structural Design

• Design Narrative.............................................................................................................1-2

• Site Observation Report

• Existing Site Utility

• Site Plan

• Utility Tunnel Plan and Profile

• Utility Tunnel Detail

Farris Engineering Utility Plant Study

• New Central Utility Plant Study

• PART1 - INTRODUCTION

GENERAL

• PART 2 - EXISTING THERMAL SYSTEMS

2.1 STEAM SYSTEM

• PART 3 - NEW CENTRAL UTILTIY PLANT

3.1 GENERAL

3.2 PLANNING CRITERIA

3.3 CONSTRUCTION

3.4 MECHANICAL SYSTEM OPTIONS

3.5 COOLING

3.6 HEATING

3.7 FUEL OIL

• PART 4 - ELECTRICAL

4.1 APPLICABLE DESIGN CRITERIA

4.2 ELECTRICAL MATERIALS

4.3 EXISTING ELECTRICAL SYSTEMS

4.4 NEW CENTRAL UTILITY PLANT (CUP)

4.5 SUSTAINABLE DESIGN

• PART 5 - FIRE SUPPRESSION

New Utility Plant Study

5.1 APPLICABLE DESIGN CRITERIA

5.2 DRY PIPE SPRINKLER SYSTEM

• APPENDIX A...................................................................................................................A-1

• APPENDIX B...................................................................................................................B-1

Castle Hill Environmental Assessment

• LIST OF TABLES

LIST OF FIGURES

• Purpose and Need for the Proposed Action

• 1.1 Introduction

• 1.2 Background

• 1.3 Purpose and Need

• 1.4 Federal Decision to be Made

• 1.5 Public Involvement and Agency Coordination

• 1.5.1 Agency Coordination

• 1.5.2 Native American Consultation/Coordination

• 1.5.3 Public Review

• 1.5.4 Summary of Public and Agency Involvement Input

• 1.6 Statutes and Regulations

• 2.0 Description of Proposed Action and Alternatives

• 2.1 Introduction

• 2.2 Description of the Proposed Action

• 2.3 Alternatives Analysis

• 2.3.1 Alternatives Development (Screening Criteria)

• 2.3.2 Initial Application of Screening Criteria

• 2.3.3 Alternatives Evaluation

• 2.3.4 Comparison of the Potential Effects of the Analyzed Alternatives

• LIST OF TABLES

• Table ES-1 Environmental Consequences of the Proposed Action Summary….

• Table 1: Evaluation of Considered Alternatives Against Established Screening Criteria

• LIST OF FIGURES

• Figure 1: Area Map of VA Campus Location

• Figure 2: Aerial Photo/Site Vicinity Map

• Figure 3: Proposed Parking Energy Center Location Drawing

• LIST OF APPENDICES

• Appendix A: Copies of Draft Correspondence to Agencies

• Appendix B: Site Visit Photos

• Appendix C: EDR NEPA Search Report, April 2023

INTRODUCTION

As part of the renovation of the former Baylor University Hospital, the VA North Texas Health Care System is developing a study and pre-design package for a new energy plant at the VAMC located in Garland Texas.

The new energy plant will be a standalone building connected to the main facility through a walkable underground tunnel. The A/E team will produce a planning document to identify a location, building size and infrastructure to provide the heating and cooling needs of the entire existing facility.

A cost estimate was calculated concurrently with the pre-design of this facility and is included in this document.

The equipment sizing is based on the current facilities usage and includes the required redundant back up.

There is no expected or planned expansion of the medical facility. The new energy center's design features separate areas for electrical generation along with cooling and boiler areas that can all be monitored from a central control room. It also includes a water chemistry room, storage and extra space available for designation during the project’s design phase if additional needs arise.

The building will be a single-story building, 41 feet high and 15,978 square feet. The entrance into the interior space will be separated by a vestibule to prevent non-staff from entering directly into the operation space and the building shall include overhead doors or knockout panels so that equipment can be easily replaced and serviced. Conversations with the VA staff, including the end users of the new plant, determined that the following spaces are required:

1. Control Room

2. Men’s Locker Room w/ toilets and shower

3. Women’s Locker Room w/toilets and shower

4. 2 Offices

5. IT/EHRM space

6. Housekeeping space

The building envelope will be constructed as described below:

Roof construction (layers from top to bottom):

1. Single ply roofing membrane – EPDM/TPO

2. ½” cover board

3. 4.3” Polyiso insulation (R-25ci) entirely above roof deck

4. Vapor retarder

5. Metal deck

6. Steel bar joist

-Walls, above grade:

R-5.7ci: Concrete block walls complying with ASTM C90, ungrouted or partially grouted at 32 inches or less on center vertically and 48 inches or less on center horizontally, with ungrouted cores filled with materials having a maximum thermal conductivity of 0.44 Btu-n/h-f2°F. Concrete block walls will be finished using a high-performance masonry wall epoxy coating system.

At the time of design all current VA design guides related to energy and water conservation will be used to create a building that meets VA standards.

UP

2756 SF

GENERATOR

AREA

1034 SF

SWGR AREA

638 SF

CONTROL

ROOM

4031 SF

COOLING

AREA

280 SF

BREAKROOM

175'-0"

0'

-0

'-0

'-8

'-4

418 SF

STORAGE

ROOM

S

F

V E

S T

5124 SF

HW PUMPS

AREA

418 SF

WATER

CHEMISTRY

386 SF

STORAGE

ROOM

STEAM BOILER

SYSTEM AUXILIARY

AREA

21'-0" 10'-0" 75'-0" 22'-8" 22'-8" 23'-8"

58 SF

CLOSET

S F

O F

F

IC

E

S F

O F

F

IC

E

120 SF

IT

238 SF

MEN'S

LCKR/RR

130 SF

WOMEN'S

LCKR/RR

37 SF

JANITORIAL

3/29/2024 12:56:33 PM

VA Garland Energy Center

1ST LEVEL PRE DESIGN

OCCUPANCY SCHEDULE

Name Area

COOLING AREA 4031 SF

GENERATOR AREA 2756 SF

SWGR AREA 1034 SF

CONTROL ROOM 638 SF

MEN'S LCKR/RR 238 SF

WOMEN'S LCKR/RR 130 SF

OFFICE 120 SF

BREAKROOM 280 SF

JANITORIAL 37 SF

STORAGE ROOM 418 SF

VEST. 72 SF

HW PUMPS AREA 5124 SF

WATER CHEMISTRY 418 SF

STORAGE ROOM 386 SF

CORRIDOR Not Placed

CLOSET 58 SF

OFFICE 120 SF

IT 120 SF

Grand total: 18 15978 SF

------BUILDING AREA------

10'-3" 164'-9"

175'-0"

0'

-0

6' -8

'-9

3/29/2024 12:56:34 PM

VA Garland Energy Center

ROOF PLAN PRE DESIGN

4'

-0

175'-0"

0'

-0

ENERGY PLANT CONCEPT75

'-0

75'-0"

3/29/2024 12:56:36 PM

VA Garland Energy Center

SITE PRE DESIGN

1ST LEVEL

100'-0"

ROOF BEARING LOWER

132'-0"

'-0

9'

-0

ROOF BEARING UPPER

141'-0"

'-0

1ST LEVEL

100'-0"

ROOF BEARING LOWER

132'-0"

9' -0

'-0

ROOF BEARING UPPER

141'-0"

'-0

3/29/2024 12:56:37 PM

VA Garland Energy Center

ELEVATIONS PRE DESIGN

EXTERIOR ELEVATION - NORTH

EXTERIOR ELEVATION - SOUTH

1ST LEVEL

100'-0"

ROOF BEARING LOWER

132'-0"

9' -0

'-0

ROOF BEARING UPPER

141'-0"

'-0

3/29/2024 12:56:38 PM

VA Garland Energy Center

ELEVATIONS PRE DESIGN

EXTERIOR ELEVATION - EAST

March 26, 2024

Stone Group Architects 600 East 7th Street Souix Falls, SD, 57103

RE: VAMC Garland, Texas Energy Center Improvements – Design Narrative

Scope of Work

The scope of work for this project includes a site survey of existing utilities and design recommendations for the new Garland Energy Center. The energy center will consist of a utility tunnel housing connections for utilities that connect to the medical center. The tunnel will be 8 ft high and 6 ft wide. The energy center will be 139.969 ft by 99.771 ft and must meet all VA design requirements.

Existing Conditions

The Garland VA Medical Center is located at 2300 Marie Curie Blvd, Garland, TX 75042. There is an open parking lot located on the east side of the main building as well as an open lot on the northwest corner of the main building along Westwood Dr. The site is adjacent to Duck Creek, located on the northeast side of the site.

Several parts of the site are adjacent to the Duck Creek floodplain. The east side of the northwest parking lot is adjacent to the 500-year floodplain. The northeast side of the main building is adjacent to the 100-year floodplain. A small portion on the north side of the southeast parking lot is near the regulatory floodway. The remainder of the southeast parking lot is adjacent to the 500-year floodplain on the east side.

Utilities Survey

Horrocks Engineers completed a subsurface utility survey and Adams Surveying Company, LLC completed an As-Built and design topographic survey in May of 2023. Utilities including potable water, storm drains, sanitary sewer, electric, telephone/internet, and natural gas can be seen in the

Site Utility Map, which shows all existing utilities that were identified.

Energy Center Locations

The optimal location for the energy center is the southeast corner of the northwest parking lot, as shown in the Site Plan. This location does not conflict with current building locations and is not within the 500-yr floodplain of Duck Creek. This location also meets the VA physical security requirement of a 50-foot force protection boundary between the building and active roadways.

Although this location will result in the permanent displacement of approximately 80 parking spots, Stone Group Architects

December 15, 2023 it is still optimal as it is closest to the main building. This location for the energy center is most cost effective because it minimizes the length of the underground utility corridor and drainage pipe.

If you have questions regarding the attached documents, please feel free to call me at 303-730-0434.

Sincerely, CALIBRE ENGINEERING, INC.

Brian Stephen-Hotopp, Vice President, Engineering Services

G-001

SITE UTILITY MAP A/E CONSTRUCT ENERGY

CENTER GARLAND

2300 MARIE BLVD. GARLAND, TX 75042

Project Issue Date

549-23-600

50% SD SUBMITTAL

KWSBASH

A

2 3 4 5 6

B

C

D

1 2 3 4 5 6

A

B

C

D

VA FORM 08-6231

# Revision Date on e eig hth in ch o ne fo ot on e qu ar ter in ch o ne fo ot thr ee e igh ths in ch o ne fo ot on e ha lf inc h on e foo t thr ee q ua rte rs in ch o ne fo ot

6" on e inc h on e foo t

6" on e an d on e ha lf inc he s on e foo t

6" thr ee in ch es o ne fo ot

6"

CONSULTANTS: Drawing Title

Office of Construction and Facilities ManagementApproved: Project Director

Project Title

Location

Date Checked Drawn

Dwg.

Drawing Number

Building Number

Project Number

Department of Veterans Affairs

117 PIERCE STEET

SIOUX CITY, IOWA 51101

712.252.4014

12700 WEST DODGE ROAD

OMAHA, NEBRASKA 68154

402.330.5900

8822 S RIDGELINE BLVD. SUITE 310

HIGHLANDS RANCH, CO 80129

303.730.0434

EXISTING SITE UTILITY AND

TOPOGRAPHIC MAP

NORTH

12700 WEST DODGE ROAD

OMAHA, NEBRASKA 68154

402.330.5900

8822 S RIDGELINE BLVD. SUITE 310

HIGHLANDS RANCH, CO 80129

303.730.0434

117 PIERCE STEET

SIOUX CITY, IOWA 51101

712.252.4014

DECEMBER 15, 2023 JKB

G-001

NORTH

KEYMAP

LEGEND

G-001

SITE UTILITY MAP A/E CONSTRUCT ENERGY

CENTER GARLAND

2300 MARIE BLVD. GARLAND, TX 75042

Project Issue Date

549-23-600

50% SD SUBMITTAL

KWSBASH

A

2 3 4 5 6

B

C

D

1 2 3 4 5 6

A

B

C

D

VA FORM 08-6231

# Revision Date on e eig hth in ch o ne fo ot on e qu ar ter in ch o ne fo ot thr ee e igh ths in ch o ne fo ot on e ha lf inc h on e foo t thr ee q ua rte rs in ch o ne fo ot

6" on e inc h on e foo t

6" on e an d on e ha lf inc he s on e foo t

6" thr ee in ch es o ne fo ot

6"

CONSULTANTS: Drawing Title

Office of Construction and Facilities ManagementApproved: Project Director

Project Title

Location

Date Checked Drawn

Dwg.

Drawing Number

Building Number

Project Number

Department of Veterans Affairs

117 PIERCE STEET

SIOUX CITY, IOWA 51101

712.252.4014

12700 WEST DODGE ROAD

OMAHA, NEBRASKA 68154

402.330.5900

8822 S RIDGELINE BLVD. SUITE 310

HIGHLANDS RANCH, CO 80129

303.730.0434

POTENTIAL ENERGY

CENTER LOCATIONS

C12700 WEST DODGE ROAD

OMAHA, NEBRASKA 68154

402.330.5900

8822 S RIDGELINE BLVD. SUITE 310

HIGHLANDS RANCH, CO 80129

303.730.0434

117 PIERCE STEET

SIOUX CITY, IOWA 51101

712.252.4014

NORTH

KEYMAP

LEGEND

NORTH

EXISTING

HOSPITAL

PROPOSED

ENERGY

CENTER

N O

R T

H

UTILITY TUNNEL

G-001

SITE UTILITY MAP A/E CONSTRUCT ENERGY

CENTER GARLAND

2300 MARIE BLVD. GARLAND, TX 75042

Project Issue Date

549-23-600

50% SD SUBMITTAL

KWSBASH

A

2 3 4 5 6

B

C

D

1 2 3 4 5 6

A

B

C

D

VA FORM 08-6231

# Revision Date on e eig hth in ch o ne fo ot on e qu ar ter in ch o ne fo ot thr ee e igh ths in ch o ne fo ot on e ha lf inc h on e foo t thr ee q ua rte rs in ch o ne fo ot

6" on e inc h on e foo t

6" on e an d on e ha lf inc he s on e foo t

6" thr ee in ch es o ne fo ot

6"

CONSULTANTS: Drawing Title

Office of Construction and Facilities ManagementApproved: Project Director

Project Title

Location

Date Checked Drawn

Dwg.

Drawing Number

Building Number

Project Number

Department of Veterans Affairs

117 PIERCE STEET

SIOUX CITY, IOWA 51101

712.252.4014

12700 WEST DODGE ROAD

OMAHA, NEBRASKA 68154

402.330.5900

8822 S RIDGELINE BLVD. SUITE 310

HIGHLANDS RANCH, CO 80129

303.730.0434

UTILITY TUNNEL

PLAN AND PROFILE

NORTH

KEYMAP

LEGEND

JKBDECEMBER 15, 2023

G-003

DETAIL A

UTILITY TUNNEL SECTION DETAIL

G-001

SITE UTILITY MAP A/E CONSTRUCT ENERGY

CENTER GARLAND

2300 MARIE BLVD. GARLAND, TX 75042

Project Issue Date

549-23-600

50% SD SUBMITTAL

KWSBASH

A

2 3 4 5 6

B

C

D

1 2 3 4 5 6

A

B

C

D

VA FORM 08-6231

# Revision Date on e eig hth in ch o ne fo ot on e qu ar ter in ch o ne fo ot thr ee e igh ths in ch o ne fo ot on e ha lf inc h on e foo t thr ee q ua rte rs in ch o ne fo ot

6" on e inc h on e foo t

6" on e an d on e ha lf inc he s on e foo t

6" thr ee in ch es o ne fo ot

6"

CONSULTANTS: Drawing Title

Office of Construction and Facilities ManagementApproved: Project Director

Project Title

Location

Date Checked Drawn

Dwg.

Drawing Number

Building Number

Project Number

Department of Veterans Affairs

117 PIERCE STEET

SIOUX CITY, IOWA 51101

712.252.4014

12700 WEST DODGE ROAD

OMAHA, NEBRASKA 68154

402.330.5900

8822 S RIDGELINE BLVD. SUITE 310

HIGHLANDS RANCH, CO 80129

303.730.0434

C

UTILITY TUNNEL DETAIL

DECEMBER 15, 2023

G-004

NEW CENTRAL UTILITY PLANT STUDY

VA GARLAND |GARLAND, TEXAS

FE #222045|VA #XXXXXXXX

MARCH 29, 2024

FE PROJECT NO. 222045

JUNE 2023 TOC-1

TABLE OF CONTENTS

PART 1 - INTRODUCTION

1.1 GENERAL

PART 2 - EXISTING THERMAL SYSTEMS .................................. ERROR! BOOKMARK NOT DEFINED.

2.1 STEAM SYSTEM

PART 3 - NEW CENTRAL UTILTIY PLANT

3.1 GENERAL

3.2 PLANNING CRITERIA

3.3 CONSTRUCTION

3.4 MECHANICAL SYSTEM OPTIONS

3.5 COOLING

3.6 HEATING

3.7 FUEL OIL

PART 4 - ELECTRICAL

4.1 APPLICABLE DESIGN CRITERIA

4.2 ELECTRICAL MATERIALS

4.3 EXISTING ELECTRICAL SYSTEMS

4.4 NEW CENTRAL UTILITY PLANT (CUP)

4.5 SUSTAINABLE DESIGN

PART 5 - FIRE SUPPRESSION

5.1 APPLICABLE DESIGN CRITERIA

5.2 DRY PIPE SPRINKLER SYSTEM

APPENDIX A ELECTRICAL SUPPLEMENTAL DATA ..............................................................................A-1 APPENDIX B MECHANICAL SUPPLEMENTAL DATA ............................................................................B-1

AUGUST 2023 1

PART 1 - INTRODUCTION

1.1 GENERAL

A. The Garland VA facility is planned to undergo extensive upgrades and renovations. Within those renovations to replace the central utility plant. It is planned that the new plant will be physically separated from the existing facility and the services will be run to buildings through a walkable tunnel system.

B. The new central utility plant will contain the electrical gear for both planned incoming services transfer switches between the services as well as backup generators. The building will also house boilers for heating the buildings as well as chillers and cooling towers to provide cooling.

C. This report scope includes effort for utility distribution interface (existing and proposed new), scenarios for additional cooling plant configurations, budgetary costs for capital plant expenditures, and utility distribution expenditures concerned with the ability to meet heating and chilled water requirements both immediate and long-range. Various options for meeting immediate and future thermal energy distribution demands will be studied to determine the recommended method of meeting these goals.

PART 2 - EXISTING THERMAL SYSTEMS

2.1 STEAM SYSTEM

A. Current Heating Loads:

1. The thermal heating loads are currently served with two operational steam boilers.

However, two additional boilers remain in place in the boiler room but have been decommissioned. Each of the operating boilers are rated for 6,200 MBH, the two decommissioned boilers were most likely rated for approximately 5,000 MBH based on heating surface of the boilers. It is unknown when fully operational what the load of the existing facility was as no records have been provided with this information and it is unknown if the decommissioned boiler were operated with the currently operational boilers.

If all four boilers were operational it is expected that with N+1 the full expected load would have been approximately 15,000 MBH. This load would roughly correspond to approximately 30 Btu/hr per square foot. This value is in line with what would be expected for the existing facility and will be used as a conservative estimate of the load of the new plant.

B. Existing Distribution System:

1. The existing steam distribution system routes 90 psig steam from the boiler room to several conversion stations throughout the facility. From these conversion stations hot water is used in terminal units. There are multiple locations where steam is used for process and terminal units as well as humidification.

2. Within the existing distribution system there are many leaks. The condensate return is low, adding significant costs to operation in make-up water, and chemical treatment. It is recommended that if the system is to remain powered by steam the existing piping be replaced to reduce the additional operating cost. Additional this will improve the reliability of the system in a reduction of leaks and the possibility of significant leaks and/or ruptures leading to down time as well as reduce the risk of personal injury due to such events.

AUGUST 2023 2

PART 3 - NEW CENTRAL UTILTIY PLANT

3.1 GENERAL

A. The immediate need for the thermal energy plant planned for construction is to serve the heating, cooling, and electrical loads of the entire campus.

1. A new plant located on north campus could be designed to contain hot water generation equipment to provide heating source to the campus in a central location with redundant equipment to prevent downtime due to failure or planned maintenance.

2. The new Central Utility Thermal Plant could be designed to contain a thermal energy storage system, operating the chillers at night and storing the chilled water until loads require. In this way, rather than operating chillers during daytime peak electrical hours and contributing to the campus electrical demand, much of the power required to generate chilled water would be consumed during off peak hours and lead to a net decrease in billable demand. (Since building chillers would now be offline during peak hours.) A large thermal energy storage tank could also be retained as a fire protection source, or be utilized as separation and blast protection from the planned parking garage.

a. A structure of significant vertical size presents architectural challenges. To minimize the massing impact of the storage tank, it is possible to partially submerge the tank in the ground. However, this method adds considerable cost. Another possibility to make the storage tank more palatable from an aesthetic perspective is to change the exterior materials of the tank. A tank with a concrete or masonry exterior would assimilate better with other campus buildings, but this solution involves a high cost with no performance enhancement.

3. An alternate method by which to create a thermal storage system is to design the chillers to ice storage.

4. It is recommended that the new heating system be steam vice the hot water system. This was concluded for the following reasons:

a. The existing boilers are going to be replaced prior to the construction of a new central plant. Keeping the heating medium as steam will allow for the soon-to-be purchased boilers to be relocated to the new plant, thus reducing the cost of the new central plant.

b. Boiler manufacturers have significantly increased to options available for economizers for steam boilers allowing for central plants to increase the efficiency of the system while maintain benefits of steam heating.

c. Using a combination of economizer and heat recovery chillers can significantly reduce operating expenses.

5. Prior to January 4, 2024, the plan was to use hot water. Many of the benefits of using hot water boilers still exist, however the economic benefits are reduced by the need to fully purchase all new boilers vice moving the soon-to-be purchased. If at the time of design the existing boilers have not been replaced considerations should be made to reevaluate the choice between steam and hot water.

AUGUST 2023 3

a. Phasing: Reusing operating boilers in a separate building will complicate the transition between switching to the new plant. The new plant will need to be built and the heating be transferred to the new plant in stages. First, a third boiler would be installed. All appurtenances in the new plant would need to be operational, as well as the piping between the hospital and the new central plant. Ensuring that condensate can be pumped to the new plant will be the item that will require the most coordination. Once the new boiler is operational in the new plant the existing boiler can be taken off-line and moved to the new plant.

3.2 PLANNING CRITERIA

A. To develop the base plant and other options described herein, several criteria were used and include the following:

1. New plant to serve existing hospital and Shiloh building.

2. New plant to include provisions for housing campus glycol storage and mixing operations.

3. New plant to contain chilled water production and distribution equipment.

4. New plant to contain heating water production and distribution equipment.

5. Plant locations as described below with goals to integrate with existing and planned future campus parking garage.

6. Thermal storage and/or heat recovery type systems if applicable.

3.3 CONSTRUCTION

A. The building materials planned for the construction of the Thermal Plant are described in detail in the Schematic Design portion of this report. However, the appearance of the facility will be similar to other recent construction on campus.

B. The plant will contain distinct heating and cooling areas for equipment, auxiliaries, and piping. If thermal energy storage is incorporated into the plant, the building footprint will be oriented to screen the storage tank and preserve the desired appearance at campus entrances and thoroughfares.

3.4 MECHANICAL SYSTEM OPTIONS

A. The supplemental plant study options include a base plant with options selected for economic evaluation. The economic evaluations are completed to determine potential financial benefits of the individual options and are discussed in a later section of the report.

B. Base Plant Option 1 – This option provides for a chilled water plant providing chilled water to the existing buildings of campus. The heating portion of the plant would be hot water. The current steam heating system would be converted to hot water. Much of the system utilizes hot water at the coil level so conversion would have minimal impact to the terminal systems of the building.

1. The new plant would include a control/office room, loading area, glycol storage for new and used glycol mixes, makeup water treatment area, and chilled and hot water production areas. The hot water and chilled water production areas would be separated minimizing the impact of a refrigerant leak under the recommendations of ASHRAE 15.

AUGUST 2023 4

C. Base Plant Option 2 - Base chilled water plant option and an additional option to include heat recovery chillers to provide chilled water and hot water to the existing campus buildings. The heat recovery chillers sizing is based on the heating load of the campus during the cooling period, as these chillers reject the heat from the chiller to create hot water, thus reducing the use of cooling towers. However, if no heating demand is present there these chillers provide no benefit.

1. The layout of this option would be the same as in Option 1, the difference would be in the relative size of the chilled water production area. Heat recovery chillers are not available in larger sizes and thus a larger number of chillers will be required to meet the demand of the cooling load.

D. Base Plant Option 3 - Base chilled water plant option and an additional option to include chilled water storage for providing chilled water. This option could be complete with or without heat recovery chillers, however it is currently planned that heat recovery chillers would be used in this Option.

1. The layout of this option would be the same as in Option 1, the difference would be in the relative size of the chilled water production area. Heat recovery chillers are not available in larger sizes and thus a larger number of chillers will be required to meet the demand of the cooling load.

2. This option would provide long term benefit by producing chilled water during off-peak hours and storing it until needed. Given the nature of existing utility rates paid now and potentially in the future, this option would allow the plant to increase thermal output capacity without increasing the initial installed capacity resulting in a much smaller increase in future overall electrical demand. The operating cost savings available with this option are described in detail in later sections of this report.

E. Plant physical layout, all options – The site location of site central plant is limited in the space available. Additionally, it is the desire of the VA to add a parking garage to the site. The interaction between the car park and the energy plant will need to be carefully evaluated to ensure that the force protection requirements of each are meet.

1. The chillers and the boilers will be in separate spaces. This ensures that in the event of a refrigerant leak will not impact on the operation of the boilers. The plant will have a refrigerant monitoring system as well that refrigerant evacuation system in the event of a leak. Keeping the boiler plant physically separate prevents the need to interlock the boilers to the refrigerant monitoring system.

2. Placing the cooling towers on the roof of the facility aids in keeping the footprint of the building small. By placing the cooling towers above the chiller space, it reduces the piping required between the cooling tower and the chillers reducing the cost for the facility.

Additionally, keeping the cooling towers elevated ensures that the condenser water pumps have the required net positive suction head available to prevent them from cavitating, increasing pump life.

3. The generator potion of the building will be required to handle a significant amount of airflow when the generators are operating. Each 3 MW generator requires over 120,000 cubic feet per minute (CFM) of air to cool the generator. The layout of the generator space must be laid out to accommodate this airflow. It is proposed that the exterior wall of the generator room be completely comprised of louvers and dampers. Each generator will require approximately 350 square feet of louver for air intake. This limits the velocity of incoming air to minimize rain and other moisture from being drawn in. The air will then be directed up and out the roof. If desired the routing of air could be reversed. The louvers

AUGUST 2023 5

can be removed to allow for generators to be removed and replaced. If desired extra square footage can be added to allow for an overhead door and an equipment aisle to remove machines. This does add to the overall square footage of the building and thus increases the cost of the building.

3.5 COOLING

A. Capacity:

1. The plant will be equipped with a firm capacity of 1,800 tons of chilled water generating capacity during the initial phase of construction to serve the immediate loads as identified above. Firm capacity refers to the capacity of the chilled water plant with the largest single chiller out of commission. However, the building site layout will be arranged to accommodate an eventual build-out of 2,700 tons to serve the potential future loads.

2. The distribution piping to the hospital would need to be a minimum of 12-inch. It should be considered to upsize that for any potential expansion to the system. Increasing to a 16-inch main would provide a capacity increase of 66% with minimal upfront costs..

B. Major Equipment: The following summarizes major equipment included in the design and conceptual construction costs for each of the options.

1. Base Plant Option 1:

• The (3) 900-ton electric driven centrifugal chillers.

• Three (3) 2,700 gpm cooling towers.

• Three (3) chilled water pumps.

• Three (3) condenser water pumps.

• Water treatment system.

• All associated instrumentation and control components.

2. Base Plant Option 2:

• Two (2) 900-ton electric driven centrifugal chillers.

• Three (3) 300-ton electric driven screw heat recovery chillers

• Two (3) 2,700 gpm cooling towers.

• Three (3) chilled water pumps.

• Three (3) condenser water pumps.

• Water treatment system.

• All associated instrumentation and control components.

3. Base Plant Option 3:

AUGUST 2023 6

• Two (2) 900-ton electric driven centrifugal chillers.

• Three (3) 300-ton electric driven screw heat recovery chillers

• Two (3) 2,700 gpm cooling towers.

• Three (3) chilled water pumps.

• Three (3) condenser water pumps.

• Water treatment system.

• All associated instrumentation and control components.

• 650,000 (4,000 ton-hours) gallon insulated steel or concrete chilled water storage tank.

• Two (2) tank pumps.

3.6 HEATING

A. Capacity

1. The plant will be equipped with a firm capacity of 17,100,000 Btu/hr (22,800,000 Btu/hr total capacity) of hot water generating capacity during the initial phase of construction to serve the immediate loads as identified above. However, the building site layout will be arranged to accommodate an eventual build-out of 34,200,000 Btu/hr to serve the potential future loads. Piping headers and many required auxiliaries will be sized for the future plant capacity as well.

2. Revised capacity, the total building out for the capacity of the boiler plant is to remain with approximately 20,000 Btu/hr (600 bhp) of firm capacity and roughly 27,000 Bth/hr (800 bhp) of total installed capacity.

B. Option X Hot Water Heating: It was decided was made to convert the heating system to hot water versus the current steam in the early stages of evaluating options for the new central utility plant.

The following summarizes the major equipment included in the design and conceptual construction costs for each of the options.

1. Base Plant Option 2 or 3:

• Six (6) 6,000 MBH dual-fuel condensing hot water boilers. The most recent VA Guidelines prefer non-condensing boilers over condensing boilers. It recommended that four (4) 8,000 MBH dual-fuel non-condensing boilers be utilized.

• Three (3) hot water pumps.

• Water treatment system.

2. The hot water distribution piping to the hospital would need to be a minimum of 8-inch pipe.

Again, consideration should be made for increasing the size to 10-inch. This would provide an extra 60% of capacity.

AUGUST 2023 7

C. Option Y Steam Heating: During the final review it was noted that the VA boiler guidelines have now shifted away from using condensing boilers for the main heating systems. Additionally, VA Garland determined that the existing boilers could not provide reliable heating until the new central plant was operational. The existing boilers are going to be replaced in kind with two 200-horsepower steam boilers. The VA desires to relocate these boilers into the new central plant. Thus, Option Y for heating is now the primary option with Option X being an alternative. The following summarizes the major equipment included in the design for this option.

1. The two-yet-to-be-purchased boilers are expected to be 200 bhp and will be relocated to the new plant. An additional boiler would be provided to ensure n+1 for the central plant.

The plant is being designed for an additional boiler of the same size for future expansion.

2. The new steam boiler plant would need a deaerator tank and boiler feed system.

3. Based on the location of the new plant on the far side of the site it anticipated that the existing condensate storage tank would either need to be replaced or at a minimum the pumps replaced to pump the condensate to the new central utility plant

4. To meet all of the requirements of the VA Boiler Design Guides it is expected that a condensate storage tank would also need to be installed in the central plant

5. Space is being allocated for water treatment of the chilled and steam systems.

6. The new steam header and steam line to the hospital are being sized at 12-inch. Based on the capacity of four (4) 200 bhp boilers this would accommodate the capacity of those boilers. This also matches the current steam header in the hospital.

3.7 FUEL OIL

A. Capacity

1. Based on the requirements to have 96 hours of fuel storage for the generators (NFPA 110) and the requirement to have 10 days of capacity for the boilers, a minimum of 56,000 gallons of fuel storage will be required.

B. Major Equipment: The following summarizes major equipment included in the design and conceptual construction costs for each of the options.

1. Base Plant Option:

• Two (2) 35,000 gallon below grade tanks.

• Fuel pumping system at each tank.

• Fuel polishing system.

3.8 DOMESTIC WATER

A. The campus domestic water service will be brought into the plant. This service will feed the cooling towers and make up water for the chilled and hot water systems. It will also be routed through the utility tunnel and supply the hospital and Shiloh building.

B. The domestic hot water could also be consolidated. Doing so would bring the central plant reliability

AUGUST 2023 8

and redundancy to the domestic water service as well. The domestic water system could use the heating hot water system as the source or separate water heaters could be used as well.

PART 4 - ELECTRICAL

4.1 APPLICABLE DESIGN CRITERIA

A. Americans with Disabilities Act (ADA)

B. International Fire Code (IFC)

C. NFPA 70 – National Electrical Code (NEC)

D. NFPA 99 – Health Care Facilities Code

E. NFPA 101 – Life Safety Code

F. VA Master Construction Specifications

G. VA Physical Security and Resiliency Design Manual

H. Department of Veteran Affairs, Office of Construction & Facilities Management Design Manual

I. Department of Veteran Affairs, Office of Construction & Facilities Management Design Guide

J. Department of Veteran Affairs, Office of Construction & Facilities Management Electrical Design Manual

K. Department of Veteran Affairs, Office of Construction & Facilities Management Lighting Design Manual

L. International Energy Efficiency Code (IECC)

M. IES Lighting Handbook Tenth Edition

4.2 ELECTRICAL MATERIALS

A. Electrical Metallic Tubing (EMT) will be primary raceway type used within the facility. Rigid Galvanized Steel (RGS) will be used where conduits are subject to damage.

B. Flexible metal conduit is permitted from outlet boxes to recessed luminaires in accessible ceilings and the final 24” of connection to equipment subject to vibrations. The maximum length of flexible conduit shall not exceed six feet.

C. Minimum conduit size will be 3/4” for power wiring and 1” for telecommunication wiring.

D. Basket-type cable tray will be provided for telecommunications wiring.

E. Fire alarm wiring will be installed in conduit with factory red finish.

F. All conductors will be single insulated conductors installed in continuous raceway. All conduits will be concealed in walls, underground, or in areas above suspended ceilings.

AUGUST 2023 9

G. Conductors will be copper with minimum size #12 AWG. Conductor insulation will be 600-Volt type THHN-2 (in dry locations) and THWN-2 (in wet locations). All conductors will be color coded per

NEC.

H. Wiring devices will be 20-amp minimum for normal power. Wiring devices will be red, 20-amp minimum and have red cover plates for emergency power.

4.3 EXISTING ELECTRICAL SYSTEMS

A. The existing hospital is served by four electrical services: Existing Main Switchboard ‘MS,’ Existing Main Switchboard ‘MSA,’ Existing Main Switchboard ‘MSB,’ and Existing Main Switchboard ‘MSC.’

The plaza is served by a separate switchboard, which is tapped off the utility transformer serving Existing Main Switchboard ‘MSC.’ The Shiloh building is served by a separate service.

B. Existing Main Switchboard ‘MS’ is located in the basement mechanical room in Area D. The switchboard is 3000 amps, 120/208V 3 phase 4 wire. It is a fusible five-section switchboard; four sections serve normal power loads, and one section serves emergency loads. The switchboard is served by utility transformer ‘MS’ (1000 kVA) and an existing utility secondary connection cabinet located in the outdoor service yard.

C. Existing Main Switchboard ‘MSA’ is located in the basement electrical room adjacent to the area well in Area D. The switchboard is 4000 amps, 277/480V 3 phase 4 wire. It is a Square D, circuit breaker, five-section switchboard that serves normal power loads. The switchboard is served by two 1500 kVA utility transformers and an existing utility secondary connection cabinet located in the outdoor service yard.

D. Existing Main Switchboard ‘MSB’ is located in the basement electrical room BD-131C1 in Area D.

The switchboard is 4000 amps, 277/480V 3 phase 4 wire. It is a fusible four-section switchboard that serves normal power loads. The switchboard is served by two 2000 kVA utility transformers and an existing utility secondary connection cabinet located in the outdoor service yard.

E. Existing Main Switchboard ‘MSC’ is located in the first floor electrical room in Area D. The switchboard is 4000 amps, 277/480V 3 phase 4 wire. It is a GE, circuit breaker, five-section switchboard that serves normal power loads. The switchboard is served by utility transformer ‘MSC’ (2000 kVA) and an existing utility secondary connection cabinet located in the outdoor service yard.

F. The hospital critical, life safety, and equipment branches are also served by three paralleled 800 kW diesel Generac generators located in the outdoor service yard. The generators feed a main emergency switchboard ‘EMDS’ located in a first floor electrical room in Area D.

G. There is an additional generator in the outdoor service yard that appears to no longer be used.

H. The main switchboard in the plaza is located in the basement. The switchboard is 1600 amps, 277/480V 3 phase 4 wire. It is a Westinghouse, fusible three-section switchboard, and it is connected to the existing utility secondary connection cabinet for utility transformer ‘MSC.’ The emergency branches are served by a 350 kW diesel CAT generator located in the outdoor service yard.

I. The main switchboard in the Shiloh building is located in the electrical room on the first floor. The switchboard is 2000 amps, 120/208V 3 phase 4 wire. It is served by a 300 kVA utility transformer located outside at the northeast corner of the building.

J. The utility company, Garland Power and Light, provided some historical usage and demand load data for 2017-2023. Below is the data from 2017, which was the last year the facility was occupied

AUGUST 2023 10

by Baylor University, and which produced the highest demand loads of the data given. The electrical services incorporated by the data include all services previously mentioned except the Shiloh building (Existing Main Switchboard ‘MS,’ Existing Main Switchboard ‘MSA,’ Existing Main Switchboard ‘MSB,’ and Existing Main Switchboard ‘MSC,’ and the plaza) .

Electrical Usage and Demand Load Data – 2017

Date kWh kW

Dec-17 1,044,000 1,718

Nov-17 1,072,800 1,761

Oct-17 1,514,400 2,023

Sep-17 1,324,800 2,642

Aug-17 1,615,200 2,491

Jul-17 1,816,800 2,700

May-17 1,298,400 2,563

Apr-17 1,180,800 2,434

Mar-17 1,305,600 2,350

Feb-17 1,216,800 2,657

Jan-17 1,202,400 2,251

AUGUST 2023 11

4.4 NEW CENTRAL UTILITY PLANT (CUP)

A. New medium voltage switchgear will be utilized at the CUP to serve the CUP building loads, and it will also be used to refeed the existing four hospital services, the plaza service, and the Shiloh building. Based on the peak demand load of the existing services and the projected CUP loads, the new switchgear will be sized at 600 amps at 12,470V. The new switchgear size shall be refined as the design progresses and mechanical equipment selections are made.

B. The new service will be sized for the full capacity of the CUP building and the peak demand of the refed existing services, but it will not accommodate future expansions. No future projects are planned to expand the footprint of the existing facility, with the exception of a parking garage. The VA stated potential for future electric vehicle charging stations. Per direction from the VA, a quantity of six electric vehicle charging stations is predicted and has been incorporated into the sizing of the new switchgear.

C. The seven existing utility transformers that feed the four existing hospital services, the plaza, and the Shiloh building will be replaced in place and will be loop fed from the new switchgear at the CUP. The intent is to reuse the existing utility secondary connection cabinets, so the VA would have to purchase them from the utility company. If that is not a possibility, and the utility company will not sell the connection cabinets, new connection cabinets will have to be provided; they would be installed at the same location as the existing connection cabinets. Further coordination with Garland Power and Light is required to determine this capability. The intent is to have the contractor complete as much of the pathway and conductor installation as possible prior to switching the transformers to minimize downtime of the services. Work can be completed outside of normal business hours to minimize the impact of losing power to a service.

D. The new CUP will be considered a mission critical facility, which will meet the requirements of the VA Physical Security and Resiliency Design Manual.

1. Two utility services will be provided to the new switchgear, and the services will come from separate utility substations if possible. This will be coordinated with Garland Power and Light. The conductors for the two services will be routed separately, maintaining at least 50 feet separation.

2. Standby generators will provide full backup power for the entire facility load, including the new CUP building and the existing refed electrical services. Based on calculations, three

(3) 2-MW diesel generators will be utilized and will be located inside the CUP building.

AUGUST 2023 12

E. All existing operating generators and associated equipment will remain in place to serve the NFPA-required Essential Electrical System – the critical, life safety, and equipment branches. The new standby generators will not be a replacement for the existing generators; they will be in addition to the existing generators.

4.5 SUSTAINABLE DESIGN

A. Building-level advanced metering will be provided for the switchgear in the CUP, and data will be collected once every 15 minutes. The data will be transmitted to VA campus metering system.

B. Per the VA Sustainable Design Manual, a minimum of 10% of the facility’s annual electricity consumption shall be provided by renewable energy sources. A photovoltaic (PV) system can be considered to provide renewable energy for the site. Refer to the Electrical Appendix for analysis of an example PV system for the site. It would utilize part of the roof of the existing building, as well as the roof of the future parking garage. The system would provide 1,066 kW of power, and it would have a payback of approximately 24 years.

PART 5 - FIRE SUPPRESSION

AUGUST 2023 13

5.1 APPLICABLE DESIGN CRITERIA.

A. VA Fire Protection Design Manual, 8th Edition – June1, 2021

B. NFPA 1 – Fire Code, 2021 Edition

C. NFPA 13 – Standard for the Installation of Sprinkler Systems, 2022 Edition

D. NFPA 24 – Standard for the Installation of Private Fire Service Mains and Their Appurtenances, 2022 Edition

E. NFPA 70 – National Electrical Code, 2020 Edition

F. NFPA 72 – National Fire Alarm and Signaling Code, 2020 Edition

G. NFPA 101 – Life Safety Code, 2021 Edition

H. Local Utility Requirements

5.2 DRY PIPE SPRINKLER SYSTEM.

A. The entire building will be fire sprinkled with a traditional dry-pipe fire sprinkler system. Based on the design conditions of Garland, TX, if the generators are operated during the winter there is a chance the outdoor air temperature will be below 32°F. This will result in the generator room going below freezing and risk freezing the system thus, a dry pipe sprinkler system will be incorporated.

Given the size of the building, it is costly and impractical to provide a separate wet pipe system for the conditioned spaces that would not fall into this extreme design condition; therefore, a single riser shall be used to serve the entire building. The sprinkler system will meet NFPA-13 as modified by the VA Fire Protection Design Manual and the local responding fire department requirements.

B. A 6” fire protection main shall enter the facility in the chiller room to serve the building’s fire sprinkler requirements. A hydrant flow test has not yet been conducted to determine the necessity of a fire pump system; however, the need for a fire pump is not anticipated. A copy of the hydrant test shall be provided with future submittals when one has been conducted.

C. Existing site plan conditions have not yet been provided. It is expected that the new 6” fire main shall be equipped with a pedestal mounted post indicator valve (PIV) that will be monitored by the building’s fire alarm system. The PIV shall be located no closer than 40’ to the facility in accordance with NFPA 24 design guidelines. Immediately upon entry into the facility, a double-check backflow preventer with supervised gate valves on each side of the double check valve assembly will be provided. A test header has been provided to allow for the full forward-flow test of the backflow preventer in accordance with NFPA 25 requirements. A flush, wall mounted fire department connection (FDC) will be provided that has threads matching the responding fire department’s requirements. The final item at the fire entry is a dry pipe riser with full trim package. The system main drain is shown to route through the exterior wall at an elevation of 6” above finished external grade and a splash block will be provided beneath the outlet. Per VA Fire Protection Design Manual requirements, the dry pipe system shall have a nitrogen generation system in lieu of the traditional air compressor. This shall extend the life of the dry pipe system. All valves on the fire portion of the system, as well as the pressure flow switch at the dry pipe riser, shall be monitored by

AUGUST 2023 14

the building’s fire alarm system. All piping shall be exposed with upright style sprinklers with protective wire guards. A remote inspector’s test connection shall be installed at the hydraulically remote portion of the system per NFPA 13 design guidelines. The outlet for this drain shall route through the exterior wall at an elevation 6” above final exterior grade with a concrete splash block located beneath the outlet.

JUNE 2023 A-1

APPENDIX A

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