S02_Attachment_Water Usage Study 224 pages.pdf

Water Usage Study

VETERANS HEALTH ADMINISTRATION

JAMES A. HALEY VETERANS’ HOSPITAL

Tampa, Florida

May 2023

Final

James A. Haley Veterans Hospital Tampa, FL

- i - May 2023 i

TABLE OF CONTENTS

1 INTRODUCTION

2 EXISTING FACILITY DESCRIPTION

2.1 Location of James A. Haley Veterans Medical Center

2.2 Existing Water System Components

2.2.1 Water Supply

2.2.2 Booster Pumping System

2.2.3 Water Storage

2.2.4 Water Distribution System

2.3 Water System Flow Analysis

2.3.1 Central Energy Plant Water Usage

2.3.1.1 New Bed Tower Energy Plant Water Demand

2.3.1.2 Known Future Development CEP Water Demand

2.3.1.3 Total Estimated Energy Plant Water Demand

2.3.2 Domestic Water Usage

2.3.2.1 New Bed Tower Domestic Water Demand

2.3.2.2 Known Future Development Domestic Water Demand

2.3.2.3 Total Estimated Domestic Water Demand

3 EXISTING WATER SYSTEM COMPONENT EVALUATION

3.1 Water Supply Connection

3.1.1 Redundancy/Operation

3.2 Booster Pumping System

3.3 Water Storage

3.3.1 Evaluating Sizing Criteria

3.3.1.1 Department of Veterans Affairs Site Design Manual

3.3.1.2 Physical Security Design Manual: Mission Critical Facilities

3.3.2 Volume Deficiency

3.4 Water Distribution System

3.4.1 Piping

4 ALTERNATIVES FOR WATER SYSTEM COMPONENT IMPROVEMENTS

4.1 Campus Water Distribution System

4.1.1 Improve System Pressures

4.2 Booster Pumping System

Tampa, FL

- ii - May 2023 ii

4.2.1 Adding a Backup Booster Pump

4.3 Water Storage

4.3.1 Replace Existing Tank with New Tank

5 RECOMMENDATIONS

5.1 Campus Water Distribution System

5.1.1 Improve System Pressures

5.2 Booster Pumping System

5.2.1 Adding a Backup Booster Pump

5.3 Water Storage

5.3.1 Water Storage Tank Replacement

6 APPENDICES

Appendix A - VA Email Correspondence

Appendix B - City of Tampa Email Correspondence

Appendix C - VA Hydrant Flow Test Data

Appendix D - City of Tampa Hydrant Flow Test Data

Appendix E - City of Tampa Water Bills

Appendix F - Water Calculations Spreadsheet

Appendix G - New Bed Tower & Energy Plant Water Demands

Appendix H - Water Meter & Backflow Preventer Cut Sheets

Appendix I - Well Inspection Report & Correspondence

Appendix J - Tower Inspection Report & Correspondence

Appendix K - WaterGEMS Results/Printouts

Appendix L - Central Energy Plant Well Report

- 1 - May 2023

Tampa, FL

1 INTRODUCTION

The James A. Haley Veterans Medical Center staff decided to pursue investigation of the facility’s water usage and analysis of the capacity of the existing water system to adequately serve the needs of the facility. This includes a comprehensive review of the elements of the VA-owned water distribution system on the campus property and evaluation of the system’s compliance with current VA design criteria. The report presented herein is a summary of that review and analysis. This review consisted of general evaluation of the existing operability and capacity of the VA water distribution system, and a review of the system in meeting current VA water supply/service design and physical security design criteria. Coordination with the City of Tampa, as the water supply provider, was also an integral part in completing this study and report.

The intent of this report is to furnish a document to identify deficiencies and provide recommendations for water system upgrades. The recommendations are made to address known or potential deficiencies to bring the facility into better compliance with current VA water supply/service design requirements and provide for subsequent development of a construction package to implement those recommendations.

- 2 - May 2023

2 EXISTING FACILITY DESCRIPTION

2.1 Location of James A. Haley Veterans Medical Center.

The VA Medical Center is located in the City of Tampa, FL. The VA Medical Center site layout is shown in Figure 1: James A. Haley Veterans Medical Center Campus. The James A.

Haley Veterans Medical Center (Medical Center) is situated in a campus-style setting bounded by 131st Street to the north and Bruce B. Downs Blvd to the east. The western and southern boundaries are multi-family residential developments. The campus is situated within a residential/commercial area of the City.

2.2 Existing Water System Components

2.2.1 Water Supply

The City of Tampa provides the water supply to the James A. Haley Veterans Medical

Center. Tampa’s drinking water is treated and disinfected to produce high-quality drinking water that meets all federal and state drinking water regulations. The Water Department primarily uses chloramine (ammonia added to chlorine) to disinfect the water. However, they switch to chlorine disinfection several times a year, usually in the winter and summer. Chlorine is a strong disinfectant that kills bacteria, helping ensure that the water remains safe to drink as it travels through the water mains and service lines. This temporary change in disinfection method lasts for three weeks at a time.

There are three water supply connection points to the VA Medical Center from the City’s water mains surrounding the site. All three connections are 8” diameter and include a meter and a backflow preventer. The service connection to the north connects to an 8” main in 131st Street, the connection to the east connects to a 12” main in Bruce B. Downs Blvd, and the connection on the west side of campus connect to an 8” main between the VA property and the adjacent residential development. Water use from each water service connection is metered and recorded by the City of Tampa. There is also a well near the elevated water tank that was used for supplementing the City water supply.

The service connections all feed into the water distribution system looped around the campus. The fire hydrants throughout the campus are fed directly from the distribution loop, as well as the domestic water for a few of the smaller buildings on campus. The distribution loop also feeds the Central Energy Plant (CEP) and the booster pumps that fill the elevated water tank.

There is an existing well near the existing water tank that has been used intermittently for a backup water supply. The well has been experiencing issues recently and is not currently being

- 3 - May 2023 used. The irrigation systems are supplied by dedicated irrigation wells separate from the domestic and fire water system. Therefore, the irrigation systems are not included in this study.

- 4 - May 2023

Figure 1: James A. Haley Veterans Medical Center Campus

- 5 - May 2023 Water Usage Study

2.2.2 Booster Pumping System

A centrifugal booster pump is located at the base of the elevated water tank. Picture 1:

Booster Pump at Water Tank shows the location of this pump. This pump boosts the water pressure from the distribution loop to fill the existing 150,000 gallon elevated water tank. The pump is made by Bell & Gossett, model HSC3, horizontal centrifugal type, size 4x6x14L with an impeller diameter of 11.5 inches. The pump is rated for 500 gpm at 130 feet TDH at 1800 RPM. The motor is 30 HP, 460 volt, 3 phase. The pumps are currently started and stopped based upon water levels in the elevated storage tank.

The water level control system consists of a pressure transducer located in the base of the riser beneath the existing 150,000 gallon elevated tank (see Picture 2: Tank Level Pressure

Transducer (Below Elevated Tank). The electrical signal generated from the pressure transducer is transmitted by wire to the pump controller to trigger pump start (at the low water level setting) and stop (at the high water level setting) points as determined appropriate by the plant operator.

Picture 1: Booster Pump at Water Tank

- 6 - May 2023 Water Usage Study

Picture 2: Tank Level Pressure Transducer (Below Elevated Tank)

2.2.3 Water Storage

The existing elevated storage tank serving the VA Medical Center was constructed in 1976.

It has a reported storage capacity of 150,000-gallons and an overall reported height of 151-feet.

The tank is an ellipsoidal type elevated tank utilizing welded steel construction. A copy of an original construction drawing for this tank is provided below:

- 7 - May 2023 Water Usage Study

Picture 3: Drawing of Existing 150,000 Gallon Elevated Tank

- 8 - May 2023 Water Usage Study

In July 2016, a visual and video inspection of the tank’s interior and exterior components and coating system was performed by Tank Industry Consultants (TIC). The conditions noted during the field inspection were documented in a Tank Inspection Report, Evaluation of 150,000

Gallon Steel Elevated Water Tank. See Appendix J for the complete report.

Picture 4: Existing 150,000 Gallon Elevated Water Storage Tank

Picture 5: Existing 150,000 Gallon Tank (Bowl)

- 9 - May 2023 Water Usage Study

Picture 6: Existing 150,000 Gallon Tank (Base and Enclosure)

2.2.4 Water Distribution System.

The existing distribution system consists of piping, valves and hydrants. A diagram of the water distribution system is shown in Exhibit 1: Existing Piping and Hydrant Layout indicating the approximate layout of the water system and fire hydrants. The elevated storage tank is located just to the south of Building 32.

The VA campus is looped with 8-inch piping constructed of either cast iron or PVC. The water quality is as delivered from the City of Tampa. Fire hydrants are connected to the distribution system to provide for exterior fire protection and flushing. The distribution system and therefore the fire hydrants are fed directly from the City connections and not from the elevated tank, so they do not benefit from the pressure boost provided by the elevated tank. Valves are provided throughout the distribution system to provide for isolation and maintenance activities.

M a y

W te r U s a g e S tu d y

J m e s A

H a le y V e te ra n s H o s p it a l

T a m p a F

L

E x h ib it

J a m e s A

H a le y V e te ra n s M e d ic a l

C e n te r

W a te r D is tr ib u ti o n M p

- 11-

May 2023 Water Usage Study

Operating pressure of the distribution system is provided by pressure in the City distribution system. Significant pressure loss is created by the water passing through the meter and backflow preventer so the pressures in the campus distribution system are lower than the pressures in the

City system. The main Hospital building, Building 1, is supplied from the elevated tank. Because of

Building 1’s upper floor elevations and pressure requirements for plumbing fixtures on those floors, it is equipped with an internal building booster pump station to boost the delivery pressure to these parts of the Hospital. This booster pump system also serves several other nearby buildings. This system is shown in Picture 7: Building 1 Booster Pump System. Each of the three pumps is rated for 400 gpm at 139’ TDH.

Picture 7: Building 1 Booster Pump System

May 2023 Water Usage Study

Fire hydrant flow testing is periodically performed to confirm the proper operation of the hydrants and the VA campus water distribution system. The results of the 2021 testing are provided in Table 1: Fire Hydrant Flow Test Data below:

Table 1: Fire Hydrant Flow Test Data

Hydrant

Number Flow (gpm)

Static Pressure

(psi)

Residual Pressure

(psi)

1 650 40 30

2 750 58 37

7 581 60 30

8 581 40 28

9 581 40 28

10 581 38 22

12 712 58 30

15 787 60 38

16 750 57 38

17 750 58 38

Main Hospital Entry

712 60 30

Near Emergency Entry

650 58 15

Beside Bldg 1

375 30 15

Static pressures throughout the facility range between 40 and 60 psi. The flow testing suggests that hydraulic capacity of the distribution system can provide flowrates between 375 and

787 gpm, with residual pressures between 15 and 38, respectively. The full test results are provided in Appendix C.

The variation in static pressures is too large to be caused by elevation differences across the site. We believe that some of the tests were conducted while the elevated tank booster pump was running, and some were conducted when the pump was off. When the pump is running it causes the pressure in the campus distribution system to drop, causing the lower static pressures recorded during some of the fire hydrant flow tests. This will be verified during new hydrant tests that will conducted during the design of campus water system improvements.

May 2023 Water Usage Study

In general, the observed flows and pressures are lower than desired. The typical requirement for fire hydrants is a minimum of 1000 gpm at 20 psi residual pressure. Calculated flows at 20 psi residual are significantly lower than 1000 gpm for most of the hydrants on campus.

System pressure should never be allowed to fall below 20 psi, and two of the hydrant tests registered

15 psi when flowing.

2.3 Water System Flow Analysis

Water purchased by the James A. Haley Veterans Medical Center from the City of Tampa is metered by nine separate meters as indicated on the image of a water bill below. Three meters are connected directly to the City water system and record total water use and the other six are within the campus distribution system and record water use and discharge at the CEP. A listing of the six internal meters indicating their function and location can be found in Appendix E.

Irrigation water is supplied by dedicated irrigation wells, so irrigation water is not metered or considered in this analysis. Laundry for this facility is processed off site, so this operation does not consume water from the campus distribution system and is not included in this analysis.

Water bills were furnished by the VA staff for the period of April 2019 to April 2022. The original water meter readings are in hundred cubic feet but are converted to gallons in the last column of the water bills. We were also provided with logs of CEP water usage kept by the staff for approximately the same time period as the water bills supplied. This data was analyzed to determine existing domestic and CEP water demands for the VA Medical Center. Some months of bills were missing, but the missing data was not significant to this analysis. The bills and a spreadsheet of the data compilation from these water bills can be found in Appendix E.

The overall average daily water use is 216,728 gallons per day (gpd) (or 150 gpm-continuously) when considering the data for the period supplied.

It should be noted that there is a significant variation in flows from a seasonal perspective.

A comparison of monthly water usage by year is provided in Table 2: Monthly Water Use

Comparison below which summarizes the water used by the VA Medical Center on a monthly basis during the period of study. The average monthly water use for the period was 6,631,636 gallons, ranging from 4,473,000 gallons minimum to 8,572,000 gallons maximum.

Table 2: Monthly Water Use Comparison

MONTH

WATER USE (GALLONS)

2019-

2021 2022

December 5,398,000

January - 7,002,000 6,626,000

February 5,322,000 4,473,000 5,904,000

March 6,475,000 5,549,000 5,416,000

April - 6,084,000 7,199,000

May 6,679,000 6,786,000 -

June - 7,808,000 -

July - -

August 8,572,000 8,078,000

September 7,967,000 7,514,000

October - -

November 7,199,000 7,235,000

December 7,340,000 5,270,000

Based upon totals of water meter bills for all three main meters.

2.3.1 Central Energy Plant Water Usage

The criteria for calculating CEP water demand from the VA Site Design Manual states

“Average daily flow rates for energy centers shall be determined based on the average daily demand during the peak month (total heating, cooling, and energy production), assuming that

90% of the demand occurs over a period of 20 hours. The peak hourly flow rate for energy center shall be two times the average flow rate.”

The CEP water usage data for the year 2019 was not used in the analysis as it was somewhat inconsistent mostly due to the main CEP meter being out of service for a large portion of the year. The peak month for both 2020 and 2021 was August, with August 2020 showing the greatest demand over the 29 days of service shown on the water bill. Therefore, we will use

August 2020 data to determine the peak hourly flow rate for the existing CEP.

• Peak Month for CEP Make-up water = August (Bill date of 9/10/2020) = 4,819,000 gallons

• Average Daily CEP Demand Peak Month = 4,819,000 divided by 29 days = 166,172 gpd

• Average Daily CEP Flow Rate = 90% of Avg Daily Demand/20 hours/60 min = 125 gpm

• Peak Daily Flow Rate = two times the Average Daily Flow Rate = 125 X 2 = 250 gpm

This gives a demand of 250/600 beds = 0.42 gpm per bed.

2.3.1.1 New Bed Tower Energy Plant Water Demand

The VA staff provided calculations for estimating water supply for the New Bed Tower

(Appendix G). The calculations indicate that the peak demand for the energy plant associated with the New Bed Tower is 55 gpm. The New Bed Tower will have 136 beds.

This gives a demand of 55/136 beds = 0.40 gpm per bed which is reasonably close to the demand of 0.42 gpm per bed calculated for the existing hospital. The per bed demand for the

New Bed Tower can be expected to be slightly lower than that of the existing hospital due to newer systems in the bed tower and other miscellaneous uses throughout the existing hospital complex.

2.3.1.2 Known Future Development CEP Water Demand

Per direction of the VA staff, the only known future development at the time of this study is redevelopment of the SCI/Polytrauma Building 38. The redevelopment of Building 38 will not increase the number of beds within the building so no additional CEP water demand is anticipated.

2.3.1.3 Total Estimated Energy Plant Water Demand

The total estimated water demand for campus energy plants will define the needed capacity of the water supply. The total CEP demand will include:

• The demand for the existing CEP

• The demand for the New Bed Tower Energy Plant

• The demand for known future development

• Contingency, defined as 10% in the Site Design Manual

• Safety Factor, recommended to be 20% to account for possible climate change impacts and other unforeseen factors

Total CEP Demand = (250 + 55) + 10% + 20% = 305 gpm X 1.10 X 1.20 = 403 gpm

2.3.2 Domestic Water Usage

The criteria for calculating hospital water demand from the VA Site Design Manual states

“Average daily domestic flow rate in gpm shall be determined by assuming 80% of the average domestic daily demand occurs in 16 hours (divide average domestic daily demand, in gallons, by

1200).” and “Peak hourly domestic flow rate shall be three times the average daily domestic flow rate.”

The water usage data from the water bills provided indicate an average daily demand of

120,170 gallons per day.

• Average Daily Domestic Flow Rate = 120,170 / 1200 = 100 gpm

• Peak Hourly Domestic Flow Rate = 100 X 3 = 300 gpm

The Site Design Manual also directs that in the absence of meter readings, the daily domestic water demand shall be calculated using 300 gpd per bed. The existing hospital has 600 beds, so the flow rates using this method are as follows.

• Average Daily Domestic Demand = 600 beds X 300 gal/bed = 180,000 gpd

• Average Daily Domestic Flow Rate = 180,000 / 1200 = 150 gpm

• Peak Hourly Domestic Flow Rate = 150 X 3 = 450 gpm

The domestic flow rates calculated per the Site Design Manual are higher than those calculated from the metered data, so conservatively, we will use the higher flow rates for design of the water system improvements.

2.3.2.1 New Bed Tower Domestic Water Demand

The VA staff provided calculations performed by the designer for estimating water supply for the New Bed Tower. The calculations indicate that the average daily domestic demand associated with the New Bed Tower is 30,100 gpd, using the City’s recommended 210 gpd per bed. The New Bed Tower will have 136 beds.

• Average Daily Domestic Flow Rate = 30,100 / 1200 = 25 gpm

• Peak Hourly Domestic Flow Rate = 25 X 3 = 75 gpm

The Site Design Manual directs that in the absence of meter readings, the daily domestic water demand shall be calculated using 300 gpd per bed. The New Bed Tower has 136 beds, so the flow rates using this method are as follows.

• Average Daily Domestic Demand = 136 beds X 300 gal/bed = 40,800 gpd

• Average Daily Domestic Flow Rate = 40,800 / 1200 = 34 gpm

• Peak Hourly Domestic Flow Rate = 34 X 3 = 102 gpm

The domestic flow rates calculated per the Site Design Manual are higher than those calculated from the City’s design guidance, so conservatively, we will use the higher flow rates for design of the water system.

2.3.2.2 Known Future Development Domestic Water Demand

Per direction of the VA staff, the only known future development at the time of this study is redevelopment of the SCI/Polytrauma Building 38. The redevelopment of Building 38 will not increase the number of beds within the building so no additional domestic water demand is anticipated.

2.3.2.3 Total Estimated Domestic Water Demand

The total estimated domestic water demand will be calculated using the total number of beds including the existing hospital and the New Bed Tower.

• Average Daily Domestic Demand = 736 beds X 300 gal/bed = 220,800 gpd

• Average Daily Domestic Flow Rate = 220,800 / 1200 = 184 gpm

• Peak Hourly Domestic Flow Rate = 184 X 3 = 552 gpm

3 EXISTING WATER SYSTEM COMPONENT EVALUATION

3.1 Water Supply Connection

3.1.1 Redundancy/Operation

As indicated previously, the VA Medical Center distribution system has three water supply/service connections points to the City of Tampa system. The VA Site Design Manual requires two water supply points of connection for redundancy. Since there are three separate connections to the City of Tampa system, the James A. Haley Veterans Medical Center meets the requirements of the Site Design Manual for water supply redundancy.

The VA staff has indicated the desire to have two on-site wells for backup water supply.

One of the wells will be dedicated to supply the water needs of the Central Energy Plant. We have completed a study of the capacity requirements for the CEP well, which can be found in

Appendix L. The construction of the CEP well will be under a separate contract from the improvements recommended herein. The second well will be a backup supply for the domestic water demand and should be sized to supply the average daily domestic demand. An inspection of the existing backup well indicates that it is not repairable. A summary of that inspection is in

Appendix I. Some potential well locations are shown on Exhibit 2: Potential Well Locations.

3.2 Booster Pumping System

The existing booster pump at the elevated tank is a one pump system. While the pump is of adequate capacity, there is no redundancy in case of pump failure. If the pump does fail the current backup plan is to feed Building 1 directly from the lower pressure distribution loop. This will ensure water supply to Building 1, but at a somewhat reduced pressure and volume.

3.3 Water Storage

3.3.1 Evaluating Sizing Criteria

Several criteria could apply to determining the need for and the size of providing water storage facilities on VA Medical Center Facilities. The design sources found pertaining to sizing water storage facilities are presented below.

3.3.1.1 Department of Veterans Affairs Site Design Manual

The Site Design Manual requires that a minimum fire storage volume of 120,000 gallons must be provided. This reference primarily addresses the flow requirements and delivery pressures that must be provided from on-site storage and on-site water distribution systems. On-

E xh ib it

2:

P ot en tia l W el l L oc at io ns site water storage must be provided in the event that either of the following cannot be provided directly from the water supply:

Fire Protection: “A minimum of 1,500 gpm at 20 pounds per square inch (psi) residual pressure.”(for non-sprinkled facilities).

While there are no patient care buildings without sprinklers, there are a number of modular buildings without sprinklers on the VA campus. We do not believe that this requirement applies directly to this site, however it does provide an indicator of good fire protection flow from a hydrant. As shown in Table 1 the existing fire hydrants, which are currently fed from the campus distribution loop, demonstrated flows that are at best only two thirds of the minimum 1500 gpm, with many only able to provide less than half of the minimum.

This indicates a need for on-site water storage and that the hydrants should be fed from the elevated water tank that can generate higher pressures.

If water storage is provided, this design reference is silent on the exact approach to sizing the tank. A common method would be to provide a minimum of one-day’s storage volume based on the sum of all of the water demands as summarized below:

Domestic demand 220,800 gpd

Fire demand 120,000 gpd

Energy Plant demand 166,172 gpd

TOTAL 506,972 gpd

Based on the above, a nominal tank size of 500,000 gallons would be recommended by this approach.

3.3.1.2 Physical Security Design Manual: Mission Critical Facilities

This manual contains physical security criteria for the design and construction of mission critical facilities like the James A. Haley Medical Center. The manual requires that at a minimum, water storage shall support 4 days of operation based upon the design criteria summarized below:

a) Potable Water: 40 gallons per day per person. For the Tampa VA Medical

Center that would translate to:

40 gpd/capita x 4000 capita/day = 160,000 gpd x 4 days = 640,000 gal

b) Energy Plant Water (cooling tower and boiler make-up):

• The peak monthly use for 2020 was 4,819,000 gallons which translates to an average daily flow of 166,172 gallons. Total storage for a 4-day period would be 664,688 gallons.

c) Fire Protection Water: A minimum of 120,000 gallons must be supplied and when unfavorable conditions occur, the minimum fire demand shall not be less than 180,000 gallons. Unfavorable conditions do not appear to apply at the

Tampa Medical Facility, therefore the minimum storage for fire protection would be 120,000 gallons.

In summary, the minimum water storage volume required by this reference document would be as follows:

Potable Water 640,000 gallons

Industrial Water 664,688 gallons

Fire Protection Water 120,000 gallons

Total Minimum Required Storage 1,424,688 gallons

The closest nominal tank size to this requirement would be a 1,500,000 gallon tank. We believe this size tank is excessive and could cause water quality issues due to longer residence times and chlorine degradation. The manual allows for reduction of the volume requirement if backup sources are provided. Two wells are planned as backup sources: one for CEP water and one for domestic water. With the very reliable source of a major City such as Tampa, and the inclusion of backup wells which have capacity to supply the average daily demand, we believe significant reduction of the storage volume requirement is warranted.

3.3.2 Volume Deficiency

Based upon the comparison of the criteria presented in the previous section it appears that a 500,000 gallon (nominal) elevated water storage tank is currently required to meet future water storage needs. Therefore the existing 150,000 gallon elevated water storage tank is deficient in size alone, regardless of age and condition.

3.4 Water Distribution System

3.4.1 Piping

Most of the existing distribution piping size and layout appear to be adequately networked or looped which improves the efficiency of the hydraulic flows and pressures throughout the

Campus and improves reliability. There is a gap in the looping of the distribution system in the northeast quadrant of the campus. Some of the buildings are served directly from the looped 8-inch water line, while the remainder are served from the water tank via the domestic water booster pumps in Building 1. Fire hydrants are connected to the distribution loop with 6-inch leads.

Based on the 2021 fire hydrant flow testing (presented in Table 1: Fire Hydrant Flow

Test Data) the current distribution system provides a below average range of static pressures (40 to 60 psi) with poor flowrates ranging from 375 to 787 gallons per minute at poor residual pressures ranging from 15 to 38 psi. This existing distribution system is inadequate to supply the recommended on-site water flow of at least 1500 gpm at a residual pressure of 20 psi.

4 ALTERNATIVES FOR WATER SYSTEM COMPONENT IMPROVEMENTS

4.1 Campus Water Distribution System

4.1.1 Improve System Pressures

The fire hydrant flow tests indicate that the flows and pressures in the distribution system are inadequate. We have conducted a hydraulic model of the water system, including the City water mains surrounding the site, the service connections, water meters, backflow preventers, the campus piping system, elevated tank and booster pump. The model indicates that the low pressures are not due to excessive pressure loss within the campus piping but are mostly due to the pressure losses generated as water passes through the meters and backflow preventers getting from the City system to the campus system. Increasing pipe sizes in the distribution system would not significantly increase the pressures available at the fire hydrants.

Another alternative to increase system pressures would be to feed the distribution system from the elevated tank. This would require a fundamental change in the operation of the system.

The tank booster pump would be fed directly from the City of Tampa service connections through pipes separate from those of the campus distribution system. The booster pump would fill the tank and the tank would supply flow and pressure by gravity to the entire distribution system, which would include the fire hydrants. The hydraulic model indicates significant increases in flows and pressures under this scenario

An additional alternative to consider is to complete the outer water distribution loop in the northwest quadrant of the campus. This would consist of an 8” water line from the service connection at the western side of the campus along Richard Silver Way to the north and east, then paralleling 131st Street to the east to connect to existing water mains near Building 39. The addition of this pipe would complete the perimeter loop of the distribution system, which would increase reliability and pressures throughout the system.

- 27 May 2023 Water Usage Study

4.2 Booster Pumping System

4.2.1 Adding a Backup Booster Pump

The existing elevated tank is filled by a booster pump at the base of the tank. There is only one pump, with no backup. Making this a duplex booster pumping system would increase reliability, providing redundancy for this critical component of the water system.

4.3 Water Storage

4.3.1 Replace Existing Tank with New Tank

This alternative includes replacement of the existing 150,000 gallon elevated water storage tank with a new 500,000 gallon (minimum) elevated tank. As detailed in this report, design criteria for Physical Security specifically requires water storage for mission critical facilities. Based upon that analysis, and in conjunction with providing at least one day’s worth of storage for an average daily demand (peak demand period) and two new wells, the volume required is approximately 500,000 gallons. Installation of a new tank would also allow the height of the tank to be set to optimize the pressures in the distribution system. Several sites for the new tank were considered as indicated in

Exhibit 3: Potential Tank Locations.

An alternative site for locating the new tank is directly south of the existing tank. The site would be just far enough away from the existing tank to allow construction without taking the existing tank out of service and is centrally located to feed the distribution system. However it is questionable that this site is large enough to accommodate all of the construction activities without blocking access to the back side of Building 1.

Another alternative site for a new elevated tank is located just to the east of the parking garage. The tank site would be located to minimize disruption to traffic and places the tank in the planned industrial area near the site of the future CEP. This location provides good contractor access and adequate construction area.

- 27 May 2023 Water Usage Study

Figure 4: Potential Water Tank Sites

- 30 May 2023

5 RECOMMENDATIONS

5.1 Campus Water Distribution System

5.1.1 Improve System Pressures

The first recommended system improvement is to reconfigure the distribution system to be fed from the elevated tank. This will provide adequate fire hydrant flows and make fire flow storage available to the entire campus. New 8” water mains will need to be installed from at least two of the water service connections (City meter locations) to the elevated tank booster pump. The discharge piping from the tank will be reconfigured to feed the distribution system.

It is also recommended that the perimeter loop be completed through an 8” water main extension in the northwest quadrant of the campus, which should be included in the future project to expand the SCI/Polytrauma Building 38 due to the current uncertainty of the layout of the expansion.

5.2 Booster Pumping System

5.2.1 Adding a Backup Booster Pump

This modification is recommended to add another level of redundancy to the critical components of the water system. The two-pump system will alternate pumps, but controls will still operate based on level in the elevated tank.

5.3 Water Storage

5.3.1 Water Storage Tank Replacement

Rehabilitation of the existing 150,000 gallon elevated water storage tank would a viable alternative if a storage volume deficiency did not exist. The existing tank does not provide adequate storage for the current criteria. It is recommended that a new 500,000 gallon elevated water tank be installed as a part of the water system improvements. There are several feasible locations for siting the new water tank, however the recommended location is beside the parking garage, which is the site preferred by the VA.

The water tank replacement would also incorporate the recommendations for distribution system improvements and backup booster pump as discussed above, as well as a new domestic backup supply well and chlorine feed system for the well water and for boosting chlorine residuals at any time it may be needed. Concept layout of recommended improvements is shown in Exhibit 4: Proposed Water System Layout.

Figure 5: Concept Layout of Proposed Water System Improvements.

6 APPENDICES

Appendix A - VA Email Correspondence Appendix B - City of Tampa Email Correspondence Appendix C - VA Hydrant Flow Test Data Appendix D - City of Tampa Hydrant Flow Test Data Appendix E - City of Tampa Water Bills Appendix F - Water Calculations Spreadsheet Appendix G - New Bed Tower & Energy Plant Water Demands Appendix H - Water Meter & Backflow Preventer Cut Sheets Appendix I - Well Inspection Report & Correspondence Appendix J - Tower Inspection Report & Correspondence Appendix K - WaterGEMS Results/Printouts Appendix L - Central Energy Plant Well Report

Veterans Health Administration

James A. Haley Medical Center

September 2022

Appendix A

VA Email Correspondence

Eric R. Mowry

From: Kotas, Christopher A. <Christopher.Kotas@va.gov>

Sent: Thursday, June 23, 2022 1:39 PM

To: David M. Parker

Cc: Guerra, Paul A.; Eric R. Mowry

Subject: RE: Questions

|External Sender|

All the trailers and trailer type modular constructed buildings on campus do not have sprinkler systems.

This includes the following buildings: 42, T-33, T-34, T-43, T-49, T-61, T-62, T-73, T-74, T-75, T-77, T-78, T-76, T-80, T-81, T-82, T-83, T-99.

Respectfully, Chris Kotas

General Engineer

Facility Management Service

James A. Haley Veterans’ Hospital, Tampa FL

Ph: (813) 972-2000, x7007

Cell: (858) 265-8714

Christopher.Kotas@va.gov

From: David M. Parker <dparker@ClarkNexsen.com>

Sent: Tuesday, June 21, 2022 12:09 PM

To: Kotas, Christopher A. <Christopher.Kotas@va.gov>

Cc: Guerra, Paul A. <Paul.Guerra@va.gov>; Eric R. Mowry <emowry@ClarkNexsen.com>

Subject: [EXTERNAL] Questions

Chris, Good talking with you this morning. I have one more question to add. We need to know any buildings that do not have a fire sprinkler system.

From: Kotas, Christopher A. <Christopher.Kotas@va.gov>

Sent: Friday, June 24, 2022 1:52 PM

To: David M. Parker; Tom Steele

Cc: Eric R. Mowry; Guerra, Paul A.; Cannon, Joseph J.; Mumley, Cullen J. (CFM)

Subject: RE: Tampa VA Water Study (PROJ: 673-21-144) - MS Teams Meeting and Fire Hydrant

Tests

Attachments: Bed Tower - Plumbing Design.pdf; VA Tampa Water Meters.pdf; Hydrant Annual Test

Graphs 2021.pdf; Hydrant Annual Test Report 2021.pdf

Good afternoon, This will be the first of a few emails over the next few business days to reply to your list of questions on the subject project.

Question 1: Regarding Bed Tower water demand and calculations, please refer to the attached document on Bed Tower

Plumbing Design. I have two additional files with drawings and chiller plant make-up water calculations, that due to file size, I’ll transmit to you via Microsoft Teams.

Question 2: We do not have information on the meters at the three connections to the City of Tampa water system – perhaps this can be acquired through the City?

Listed below is the information on the backflow preventers installed at these three locations:

Location Size____Model___

By the West wall 6” Watts 957.

131st St. BIO-Cage 8” Ames 4000 SS

Bruce B. Downs 8” Wilkins DN 200

Attached is the 2021 hydrant flow test data, as requested. We’ll provide you 2022 test data once we have it.

Question 5, on the location of the 9 meters on VA property: Attached is a sheet identifying the locations of the 6 meters that do NOT tie into the City of Tampa water system. Do you also need the location of the 3 meters that DO tie in directly to the City water system?

Question 7: The valve on the northwest side of the tee valve is open. The feed from the tank normally only feeds the loop towards Bldg 1, but on exception can be used to feed the CEP.

Question 8: In terms of future planned development, do consider the following --

• The Bed Tower project, for which we’ve provided you information;

• Bldg 2 is currently under complete renovation and unoccupied, though at some point in the future it will be approved for beneficial occupation and become a water consumer. Bldg 2 is a three story, approximate 65,000 square foot facility that will house administrative and research laboratory space.

• The SCI/Polytrauma Building 38 has a planned expansion to renovate the current 100 SCI Beds (mix of single patient and multi-patient spaces) to single patient beds. The number of beds will remain at 100. Demolition is tentatively planned to begin 2026.

Question 9: All laundry is washed off-site.

Question 10: The circles have no significance.

I’m still collecting information on the other questions you’ve asked, and will have that to you next week. Let us know what else you may need.

From: David M. Parker <dparker@ClarkNexsen.com>

Sent: Tuesday, June 7, 2022 9:58 AM

To: Tom Steele <tsteele@toland-mizell-molnar.com>; Kotas, Christopher A. <Christopher.Kotas@va.gov>

Cc: Eric R. Mowry <emowry@ClarkNexsen.com>; Guerra, Paul A. <Paul.Guerra@va.gov>

Subject: [EXTERNAL] RE: Tampa VA Water Study (PROJ: 673-21-144) - MS Teams Meeting and Fire Hydrant Tests

We have a list of questions for you that we have attached. Also we have included some Attachments to help clarify some of the questions. If you need any additional clarification we can discuss when we meet hopefully this week.

Thanks, Dave

Dave Parker PE

Senior Civil Engineer | Associate Principal

Dave

Dave Parker PE

Senior Civil Engineer | Associate Principal

C L A R K N E X S E N

T o h e l p p r o t e c t y o u r

4525 Main Street Suite 1400

Virginia Beach, VA 23462

757.961.7768 Direct

757.455.5800 Office

dparker@clarknexsen.com www.clarknexsen.com

#CONFIDENTIALITY NOTE: This e-mail and any files transmitted with it contain privileged and confidential information and are intended solely for the use of the individual or entity to which they are addressed. If you are not the intended recipient or the person responsible for delivering the e-mail to the intended recipient, you are hereby notified that any dissemination or copying of this e-mail or any of its attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify the sending individual or entity by e-mail and permanently delete the original e-mail and attachments from your computer system.#

From: Kotas, Christopher A. <Christopher.Kotas@va.gov>

Sent: Wednesday, July 6, 2022 11:22 AM

To: David M. Parker

Cc: Eric R. Mowry; Tom Steele; Guerra, Paul A.; Garrett, Travis D.

Subject: RE: Tampa VA Water Study (PROJ: 673-21-144) - MS Teams Meeting and Fire Hydrant

Tests

Attachments: 00-21 Emergency Management Manual 2010.docx

Follow Up Flag: Follow up

Flag Status: Flagged

Hi David, Attached is the current version of the hospital’s Emergency Management Manual. Please note it’s now in review for an update, with the understanding that findings from your study will be used to revise it.

Per our Emergency Management Unit, we have 3,500 to 4,000 employees here, and an additional 600 in-patient beds. Depending on the type of emergency, those numbers will vary. For example, in a hurricane scenario (which the

Physical Security and Resiliency Design Manual focuses on), there would be reduced operations here, with an estimated

2,500 individuals on-site.

Let me know what else you need in regards to this latest question, and I still owe you information on some prior requests.

From: Kotas, Christopher A. <Christopher.Kotas@va.gov>

Sent: Thursday, July 14, 2022 1:08 PM

To: David M. Parker; Eric R. Mowry; Tom Steele

Cc: Guerra, Paul A.; Johnson, Ronald B.

Subject: Tampa VA Water Study (PROJ: 673-21-144) - MS Teams Meeting and Fire Hydrant Tests

Here is some additional information on questions asked by your team regarding the ongoing Tampa VA water study, as provided by the CEP team:

Question 3: The units for makeup water are in gallons.

Question 4: I have to look into a monthly log for water usage, as far as I know, we are not tracking, on a separate log, monthly water usage.

Question 6: The days that say OOS, is likely someone not able to get a reading off of the polisher panel. For a long time we were getting our daily gallons off of the polisher panel at midnight and resetting it back to zero, if someone wrote

OOS, it’s because the polisher is/was OOS. We have since replaced the meter by the roll-up and our current midnight readings are coming from that.

From: Kotas, Christopher A. <Christopher.Kotas@va.gov>

Sent: Friday, July 15, 2022 3:16 PM

To: Eric R. Mowry; David M. Parker; Tom Steele

Cc: Guerra, Paul A.

Subject: RE: Tampa VA Water Study (PROJ: 673-21-144) - New Bed Tower Info Request

There are 136 patient beds in the Bed Tower. 40 ICU beds on Level 2 and 96 Med/Surg beds split between Levels 3 & 4.

I just sent you civil design and drawings on the web site established for this project.

From: Eric R. Mowry <emowry@ClarkNexsen.com>

Sent: Friday, July 15, 2022 11:22 AM

To: Kotas, Christopher A. <Christopher.Kotas@va.gov>; David M. Parker <dparker@ClarkNexsen.com>; Tom Steele

<tsteele@toland-mizell-molnar.com>

Cc: Guerra, Paul A. <Paul.Guerra@va.gov>

Subject: [EXTERNAL] RE: Tampa VA Water Study (PROJ: 673-21-144) - New Bed Tower Info Request

James A. Haley Medical Center

Appendix B

City of Tampa Email Correspondence

From: WaterCommitment <WaterCommitment@tampagov.net>

Sent: Friday, June 3, 2022 9:17 AM

To: Eric R. Mowry; WaterCommitment

Cc: Maryly Hudson

Subject: RE: Hydrant Flow Test Data Request

Categories: Filed by Newforma

Good morning Eric, No problem, I issued a service order for the 5th hydrant highlighted below. I’ll follow up with the test reports soon.

SO#3383378

A-14-4-02, NWC 30TH ST & 131ST AVE, FID 1671682, Eric Mowry

757.961.7942

SO#3383382

A-14-4-11, SS 131ST ST: 150' E OF 23RD ST, FID 1671691, Eric Mowry

757.961.7942

SO#3383384

A-14-4-03, ES 30TH ST: 1100' S OF 131ST AVE, FID 1671683, Eric Mowry

757.961.7942

SO#3383445

A-14-4-13, 131ST AVE @ SE END OF PRINCE MANOR APTS, FID 1671693, Eric

Mowry 757.961.7942

SO#3384871

A-14-3-23, WS BRUCE B. DOWNS BLVD: 450' N OF CAMPUS HILL, FID

1671680, Eric Mowry 757.961.7942

Thank you, Maryly Hudson Utilities Permitting Technician, Water Department

City of Tampa / 4900 W. Lemon Street / Tampa, Florida 33609 p: 813-274-7086 / e: Maryly.Hudson@Tampagov.Net

Please note: This e-mail is public record.

Sent: Friday, June 3, 2022 8:27 AM

To: WaterCommitment <WaterCommitment@tampagov.net>

Subject: [EXTERNAL] Re: Hydrant Flow Test Data Request

Maryly, Based on some additional discussions, we wanted to see if we could add one more hydrant to our request for the VA Hospital. Please see the attached map. I have circled a hydrant in the bottom right corner of the map that we would like to add. Please let me know if you have any questions.

Eric Mowry PE

Senior Civil Engineer o h e l p p r o t e c t y o

757.961.7942 Direct

757.455.5800 Office

emowry@clarknexsen.com www.clarknexsen.com

From: WaterCommitment <WaterCommitment@tampagov.net>

Sent: Wednesday, June 1, 2022 3:00 PM

To: Eric R. Mowry <emowry@ClarkNexsen.com>; WaterCommitment <WaterCommitment@tampagov.net>

Subject: RE: Hydrant Flow Test Data Request

Yes, of course, I have issued service orders for all 4 hydrants circled below. Please allow ten business days for results - barring unforeseen circumstances. The report will be emailed to you when it becomes available.

SO#3383378

A-14-4-02, NWC 30TH ST & 131ST AVE, FID 1671682, Eric Mowry

757.961.7942

SO#3383382

A-14-4-11, SS 131ST ST: 150' E OF 23RD ST, FID 1671691, Eric Mowry

757.961.7942

SO#3383384

A-14-4-03, ES 30TH ST: 1100' S OF 131ST AVE, FID 1671683, Eric Mowry

757.961.7942

SO#3383445

A-14-4-13, 131ST AVE @ SE END OF PRINCE MANOR APTS, FID 1671693, Eric

Mowry 757.961.7942

Sent: Wednesday, June 1, 2022 2:01 PM

Subject: [EXTERNAL] Re: Hydrant Flow Test Data Request

Maryly, Thank you for reaching out. Can I please add the hydrant down at 2313 Dundee Court in place of the hydrant that you noted was not owned by the City of Tampa?

757.961.7942 Direct

757.455.5800 Office

emowry@clarknexsen.com www.clarknexsen.com

From: WaterCommitment <WaterCommitment@tampagov.net>

Sent: Wednesday, June 1, 2022 1:56 PM

To: Eric R. Mowry <emowry@ClarkNexsen.com>; WaterCommitment <WaterCommitment@tampagov.net>

Subject: RE: Hydrant Flow Test Data Request

Good afternoon Eric, We do not show a City hydrant where you have #2. Below I circled our hydrants, please confirm these and feel free to pick a 4th one.

Sent: Wednesday, June 1, 2022 9:33 AM

Subject: [EXTERNAL] Hydrant Flow Test Data Request

We would like to request hydrant flow test data to aid in performing a water study for the Tampa VA Hospital.

Please see the attached map showing the location of 4 hydrants included in the request. If there is a limit to the number of hydrant tests, and 4 is too many, then we would request that the hydrants be chosen based on the numbering on the attached map, i.e. Hydrant Test - 1 is the highest priority, etc. Please let me know if you have any questions.

757.961.7942 Direct

757.455.5800 Office

emowry@clarknexsen.com

From: WaterCommitment <WaterCommitment@tampagov.net>

Sent: Friday, June 3, 2022 9:06 AM

To: emowry@ClarkNexsen.com

Cc: Craig Barnes

Subject: RE: GIS Mapping Request

Categories: Filed by Newforma

Good morning, Unfortunately, we do not have record of the meters locations. I am showing 9 active meters and at least one city owned fire line backflow. I have looped in our field quality group to give more insight into the fire lines.

David Drash Engineer I, Water Department

City of Tampa / 4900 W Lemon St / Tampa, Florida 33609 p: (813) 274-5178 / e: David.Drash@tampagov.net

Please note this e-mail is public record.

From: watermapsandasbuilts <watermapsandasbuilts@tampagov.net>

Sent: Friday, June 03, 2022 8:30 AM

Subject: FW: GIS Mapping Request

Is this something that you can assist with?

Thank you!

Shawn Sierck Drafting Technician II / Water Department

City of Tampa / 4900 West Lemon Street / Tampa, Florida 33609

Sent: Thursday, June 2, 2022 3:31 PM

To: watermapsandasbuilts <watermapsandasbuilts@tampagov.net>

Subject: [EXTERNAL] RE: GIS Mapping Request

Shawn, Thank you for the GIS Mapping. We have a couple additional requests related to the City of Tampa water system around the perimeter of the VA Hospital campus. As part of our study, we have received the previous 3 years’ worth of water usage records to aid in determining demands for the campus. Please see attached for one of the records from March

2022. We wanted to see if the city would be able to provide any or all of the following information as it relates to the 12 meters listed on the attached record.

• Can you confirm if all 12 meters are active? We noticed on the attached that two of the meters had 0 gallons of flow.

• Do you have mapping available, or can you provide mapping showing the approximate location of all meters?

• Can you provide size, make, and model information for all meters?

• In addition to meters, if there are any City owned detector checks or backflow preventers at active meter locations, can you provide size, make, and model information for these item?

Please let me know if you have any questions or advise if there is someone else that I should reach out for this information.

o h e l p p r o t e c t y o

757.961.7942 Direct

757.455.5800 Office

emowry@clarknexsen.com www.clarknexsen.com

From: watermapsandasbuilts <watermapsandasbuilts@tampagov.net>

Sent: Wednesday, June 1, 2022 12:20 PM

To: Eric R. Mowry <emowry@ClarkNexsen.com>

Subject: RE: GIS Mapping Request

Good afternoon Eric, Please see attached GIS map for water facilities near the James A Haley Veterans’ Hospital and surrounding area.

If you have any questions, please let me know.

Have a good day, Shawn Sierck Drafting Technician II / Water Department

City of Tampa / 4900 West Lemon Street / Tampa, Florida 33609

Sent: Wednesday, June 1, 2022 9:36 AM

To: watermapsandasbuilts <watermapsandasbuilts@tampagov.net>

Subject: [EXTERNAL] GIS Mapping Request

We would like to request GIS mapping for City of Tampa water mains to aid in a water study we are performing for the Tampa VA Hospital. Please see the attached map for the location where we are requesting the GIS mapping. We are specifically looking for the location, size, and material of existing water mains. Please let me know if there are any questions.

o h e l p p r o t e c t y o

757.961.7942 Direct

757.455.5800 Office

emowry@clarknexsen.com

From: WaterCommitment <WaterCommitment@tampagov.net>

Sent: Friday, June 3, 2022 12:43 PM

To: Eric R.