Attachment F - Bid Documents Submittal 546-19-102.pdf

UPGRADE WATER MAINS TO

BUILDING 1 FCA-D

Bruce W. Carter VA Medical Center Miami, FL July 8, 2020

Bid Documents Submittal Design Analysis

Project Number: 546-19-102

Bid Documents Submittal

Bruce W. Carter VA Medical Center Miami, FL July 8, 2020

TABLE OF CONTENTS

I Executive Summary / Architectural Narrative

II Civil Narrative III Plumbing Narrative IV Environmental Narrative V Electrical Narrative

APPENDICES

A Cost Estimate B Meeting Minutes

NOTE: ALL SECTIONS MAY NOT BE APPLICABLE OR INCLUDED IN INTERIM SUBMITTALS

Bruce W. Carter VA Medical Center

I. Executive Summary / Architectural Narrative

Upgrade Water Mains to Building 1 FCA-D Miami VAMC, Miami, FL Project No.: 546-19-102

Page I-1

I. Executive Summary and Architectural Narrative

A. Goals and Needs:

This Project is planned to replace/upgrade the water mains to Building 1 and analyze the need to replace isolation valves. The water mains were installed in 1967 as part of the original project and are in poor condition.

Also, the underground mains consist of transite, asbestos piping. This type of piping is very difficult to work with and requires special techniques to fix and requires disposal via approved means. Some water mains run in the crawl space underneath the buildings on the campus and in chases and have developed leaks which require extensive demolition and construction to correct.

B. Existing Conditions:

The project area is generally within the footprint of Building 1 as well as site areas to the East and West of Building 1 to the limits of the right of way.

C. Scope of Demolition:

As previously mentioned, demolition work will primarily remove the existing underground transite water mains. Currently being studied is the option of abandoning in place the existing transite piping in certain locations and filling with suitable materials. Also being studied is the budget needs required to replace isolation valves throughout the building.

D. Scope of New Work:

At the exterior portions of the scope of work above, patching/repair will be required at parking, walks and lawn areas. Repair work for walls/ceilings will be minimum at the crawl space level but the upper floors may require extensive repair of walls at plumbing fixture locations and ceilings depending on the limits of work involving piping and valve replacement. Architectural drawings will indicate the affected areas following the review process. See the following narratives for Civil, Plumbing and Environmental (Abatement).

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E. Phasing

Some phasing of the project will be necessary to permit occupancy of departmental areas during construction. This is of course an environment that functions 24/7 and much concern must be taken when considering how to isolate work areas.

F. Construction Cost Analysis

The project budget is currently $5,282,285.00. The cost estimate at this stage with the current scope is $5,255,858.81. At this stage, a Partial Renovation Contingency (5%) is included as well as a line item for General Conditions (15%). Also included within the current estimate is money for water heater replacement and horizontal conversion piping for floors 10, 11 and 12, as shown on the drawings. The project estimate is currently within the budget. Three deductive alternates are identified in the Bid Document specifications that omit areas of horizontal conversion piping on the 10th and 12th floor levels. The combination of the three alternates amount to $1,334,349.20 (25% of the estimate).

G. Project Schedule

Allowing up to six months for advertisement, bidding, and contracting, and another 12 months for construction, project completion could be anticipated in the first calendar quarter of 2022.

H. Codes and Standards:

1. VA Design Guides-Technical Information Library

2. Florida Building Code – Latest Edition

3. Florida Fire Code – Latest Edition

I. Items needed from the Government:

1. Review of design for approval and authorization to proceed with contracting.

Bruce W. Carter VA Medical Center

II. Civil Narrative

Page II-1

II. Civil Narrative

A. Goals and Needs:

This Project is planning to remove and/or fill and abandon-in-place the existing eight (8“) inch transite (domestic) water supply lines mainly to and within Building 1 with some interior areas of a loading dock and a paved courtyard. Refer to MEP information for areas within a building.

B. Existing Conditions:

The existing water supply line is a redundant supply from the following:

City watermains on NW 14th Avenue to the west; and

City watermain on NW 12th Avenue to the east.

Based on existing utility mapping and recent survey, these supply lines are mainly in a straight line (east-west) between the existing east and west City watermain connections.

Both existing supply sources shall be maintained.

From the existing standing valve rack at NW 14th Avenue the existing eight (8“) inch transite (domestic) water supply line extends easterly under the existing VAMC parking lot to a grouping of existing valves at least for this supply line and to and from the existing, and northerly, water tower; then continues easterly under a blast wall to two (2) existing standing valve racks; then continues under an existing maintenance roadway to the corner of Building 41; then overhead and along the northerly façade of Building 41; then mainly overhead within Building 41 to two (2) existing standing valve racks along the outside and easterly façade Building 41; then continuing easterly under the previously removed incinerator building to a grouping of existing valves; then under the existing loading dock area; then under the existing north-south building area connecting Building 1 to Building 7; then under the existing courtyard for the former swimming pool area; then under the existing building leg of Building 1 located northerly of Ambulatory Care; and finally, under the existing VAMC parking and drive lanes to the existing standing valve rack at NW 12th Avenue.

Tees and valves connected to these redundant supply lines and outside the building footprints were found, or noted, in the following locations:

In the existing easterly parking lot to supply Fisher House to the south;

Near the existing valve grouping in the existing easterly parking lot to supply a fire line;

Near the westerly side of the existing loading dock area to supply Building 7 to the north; and

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Near the westerly side of the existing loading dock area to supply Building 1 to the south.

Removal and demolition work will fully remove the existing eight (8“) inch transite (domestic) water supply lines in the following locations:

1. between the existing standing valve rack at NW 14th Avenue and the existing valve near Building 1’s blast wall from the west;

2. between the two (2) existing standing valve racks along the easterly and existing façade Building 41 and the existing valves in the westerly side of the existing loading dock area (or, located under the previously removed incinerator building); and

3. between the existing façade of Building 1 and the existing standing valve rack at NW 12th Avenue from the east.

Fill and abandon-in-place work will fully fill with flowable fill, grout, etc.

the existing eight (8“) inch transite (domestic) water supply lines in the following locations:

1. between the existing valves in the westerly side of the existing loading dock area and the existing building façade on the easterly side of the existing loading dock area;

2. under the existing north-south building area connecting Building 1 to Building 7;

3. under the existing courtyard for the former swimming pool area; and

4. under the existing building leg of Building 1 located northerly of

Ambulatory Care.

The new work will involve providing and installing new ten (10“) inch * DIP (domestic) water supply lines in the following locations:

1. between the existing standing valve rack at NW 14th Avenue and the existing valves near Building 1’s blast wall from the west;

2. between the two (2) existing standing valve racks along the easterly façade Building 41 and directly southerly to the northerly and existing façade of Building 1;

3. within the crawlspace of Building 1 – refer to MEP information; and

4. between the existing façade of Building 1 and the existing standing valve rack at NW 12th Avenue from the east.

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Any existing standing valve racks will remain undisturbed, except for connections to adjacent elbows and/or valves.

* VA maintenance staff reported that the incoming and incoming sources have reached their capacity and should be upsized. To keep costs down, only the above noted locations will be replaced with new ten (10“) inch DIP (domestic) water supply lines – until directed otherwise by the VA.

The existing pipe between the existing valves near Building 1’s blast wall and the two (2) existing standing valve racks along the easterly façade Building 41 will remain undisturbed. This existing pipe is partially underground, along the northerly façade of Building 41, and within Building 41.

Some phasing of the project may be necessary to ensure continuous water supply without extended interruption(s). This may include, but not limited to: night work, weekend work, maintain at least one (1) redundant water supply, etc.

There will also need to be contractor and VAMC coordination for the related work near the westerly side of the existing loading dock area to maintain access to the majority of the loading dock bays.

F. Codes and Standards:

1. VA Design Guides-Technical Information Library

2. Florida Department of Transportation (DOT) Standard Specifications for Road and Bridge Construction – Latest Edition

G. Items needed from the Government:

1. Review of design for approval and authorization to proceed with next submittal.

2. Review and approval of filling and abandon-in-place of transite water pipe as allowed by VA specifications; and by State of Florida and Miami-Dade County EPA.

Bruce W. Carter VA Medical Center

III. Plumbing Narrative

Project No.: 546-19-102

Page III-1

III. Plumbing Narrative

1. This project is planned to replace the existing crawlspace cold water distribution piping, selective floor isolation valves and -floor horizontal piping conversion at the Miami VAMC. This will be performed to meet facility upgrade and modernization needs, and a better adherence to the VA guidelines.

2. The general goals are providing project design and construction documents to:

a. Replace the existing domestic cold-water mains and associated valves within the crawlspace that are near their life expectancy.

b. Replace all existing domestic water isolation valves on the first, second, third and eleventh floors. These valves are difficult to access, operate and are suspected of not completely closing.

c. Separate the Low Pressure Zone Hot Water System from the High Pressure Zone Hot Water System in accordance with VA Plumbing Design Manual (November 2014 edition with May 1, 2018 Revisions) paragraph 4.2.7. and install the infrastructure to circulate the cold water supply in Bldg 1.

d. Convert the eleventh (wing AB) floor existing cold water and hot water domestic water supply piping to a horizontal conversion piping system. The existing tower cold water and hot water piping configuration incorporates a single valve isolation for all risers. These valves provide the isolation for all lower toilet room and fixtures. The floor horizontal conversions shall have individual isolation valve locations that are readily accessible for facility personnel, with additional shutoff valves at each fixture or fixture group.

e. Twelfth floor horizontal conversion system will use eleventh floor mains with branches up to twelfth floor fixtures.

f. Convert the existing vertical supplied tenth floor water piping to a horizontal system.

B. Existing Conditions:

1. Selective field survey of building #1 at the Miami VA Hospital has been completed to the extent possible. This survey shall provide as built conditions of the existing domestic water piping system and associated valves within the scope of this work. The field survey completion percentage is as follows:

Project No.: 546-19-102

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2. Building #1 is fed by an existing dual feed 8” cold water main that enters the crawlspace below grade from the east and west. This 8” cold water main continues below grade to service the building, completing a code compliant supply loop.

3. There are three existing cold-water sub-mains (6”, 6” and 4”) that branch off the existing 8” cold water main within the crawlspace. These cold-water sub-mains supply the first through third floors. These sub-mains are not connected to a booster pump system.

4. The fourth floor through eleventh floor tower cold water and hot water piping utilizes a vertical distribution system, with multiple risers routed down through the tower. Individual cold water and hot water risers are located adjacent to each bathroom group.

5. Survey observations:

a. Most of the facility is in operation 24 hours a day, 7 days a week as a working hospital environment.

b. The existing isolation valves observed are located within congested ceiling cavities with minimal access.

c. These conditions will be accounted for in the cost estimate provided.

6. The existing dual water heaters in the basement supply hot water to the low and high pressure zones The hot water return piping is comprised of 5 low pressure return mains and 3 high pressure return mains. All returns are gathered in a common header for common return routing to the hot water recirculating pump. The 5 low pressure returns are not labeled. The 3 high pressure return are labeled as 5-11 CD (should be 5-10 & 12 CD), 5-12 AB and 12 CD (should be 11CD).

7. Due to the mixing of pressure zones, but as important, the evolution of the hot water distribution and return modifications along with unknown balancing valve locations and flow status of balancing valves: return flows are expected to be deficient. Existing hot water return temperatures were measured on site with VA plumbing shop personnel on 5/21/2020 as follows:

a. 5 low pressure zones

1. 94 degrees F

2. 103 degrees F

3. 93 degrees F

4. 106 degrees F

5. 115 degrees F

b. 3 high pressure zones

Project No.: 546-19-102

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6. 98 degrees F (5-10 &12CD)

7. 95 degrees F (5-12AB)

8. 97 degrees F (11CD)

8. In addition to return temperatures by zone, we measured the return temperature at the combined header discharge at the return pump. This temperature was recorded at 106 degree F. By comparison, the reading at a thermometer located at the return pump was 118 degrees F. It should be noted that the surface temperatures were measured with a plumbing shop infrared temperature sensor. Even though the thermometer temperature and measured infrared temperature are 10% apart, it is clear that all temperatures of all returns are below the upper limit of the legionella growth range of 67 to 124 degrees F. It is highly recommended that the VA plumbing shop install thermal wells on all the returns, measure temperature and report findings to the COR to provide the A/E.

1. Crawlspace domestic cold-water piping: Prepare contract documents that indicate:

a. The existing horizontal piping, vertical risers, valves and crawlspace conditions relative to the demolition scope.

b. The removal or abandonment of the existing domestic cold-water mains and sub-mains including all associated components, valves and hangers.

c. The removal and protection of the existing water monitoring equipment and piping.

2. First, second, third, and eleventh floors: Prepare contract documents that indicate:

a. Locations of all isolation valves based on the existing Miami VAMC plumbing as-built drawings and field verified during the site investigation of this project.

b. Detail the removal of valves by size and type.

3. Eleventh, Twelfth and Tenth floor horizontal conversion: Prepare contract documents that indicate:

a. The as-built vertical water distribution system at the toilet chases required to be converted.

Project No.: 546-19-102

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b. Existing sink, lavatory faucets, shower valves and mop sink faucets will be demolished, where horizontal conversation occurs to allow for the increased domestic hot water supply temperature.

4. General: Removal and reinstallation of ceiling and ceiling cavity components will be required at all locations where domestic water piping and valves are scheduled to be replaced. Refer to the below for ceiling components that may affect demolition and new work as noted below.

Refer to Architectural Section I for additional details.

a. Ceiling tile

b. Ceiling tile support grid

c. Hard ceiling ceilings

d. Light fixtures

e. Smoke detectors

f. Fire alarm devices

g. Electrical conduit

h. Communication cable

i. Ductwork

j. Miscellaneous piping systems

1. Perform a field survey to map potable water piping and sizing of all areas within the scope of work of this project.

2. Crawlspace domestic water piping: Prepare contract documents that indicate:

a. The installation of new domestic cold-water mains and sub-mains including all associated components, valves and hangers.

b. Connection to the new site utility water mains.

i. As part of the 50% design review comments, there was mention of a previous FCA report (not shared with the design team) that stated a recommendation to upsize of the incoming water sources. To address this comment, the design team has upsized the replacement water main from 8” to 10”.

c. The reinstallation and commissioning of the existing water monitoring equipment and piping.

3. First, second, third, and eleventh floors: Prepare contract documents that indicate:

Project No.: 546-19-102

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a. Locations of all isolation valves based on the Miami VAMC as-built drawings.

b. Detail the replacement of valves by size and type.

4. Separate Low and High Pressure Water Heating System

a. Existing dual water heaters in basement will serve high pressure system.

b. A new water heating system will be installed in basement for low pressure system.

c. Existing 3 high pressure hot water returns to repurposed and dedicated high pressure hot water system are currently connected to the common return main and may remain as is.

d. Route 5 existing low pressure returns to new low pressure water heater return pumps.

5. Eleventh, Twelfth and Tenth (C/D) floor: Prepare contract documents that indicate:

a. The conversion from an existing vertical cold water and hot water pipe distribution system to a new horizontal piping distribution system..

b. Connection of new horizontal cold water, hot water and hot water return piping mains on the existing risers previously installed.

c. The new horizontal piping system shall allow for isolation by floor and fixture group, installation of monitoring, and provisions for circulation of the hot water.

d. Installing monitoring points that communicate hot water temperature conditions with the building management system.

e. Providing new faucets at each sink, lavatory and mop sink with a thermostatic mixing valve and thermal bypass for thermal eradication processes.

f. Replacing all existing shower valves with new thermostatic shower valves that can be bypassed and thermally eradicated.

6. All hot water and hot water return piping will be insulated. Cold water piping will not be insulated as it is not a code requirement and the existing cold water piping in Bldg 1 is not insulated. All new piping installed will be labeled for identification and flow direction. During the site investigation, Plumbing Shop techs indicated that the facility does not have a problem with cold water piping condensation within Bldg 1.

7. Cold Water Circulation was discussed in 100% review meeting. VA Directive 1061 and the VA Plumbing Design Manual suggest that a facility should evaluate the need for cold water circulation. Based on experience at other VA facilities, cold water circulation and associated

Project No.: 546-19-102

Page III-6 infrastructure is typically being included due to cold water temperatures exceeding 67 degrees F during much of the year and to reduce stagnation.

The best time to include cold water circulation is while ceilings are open and re-piping is occurring in the horizontally converted floors. The additional infrastructure required is cold water circulation pumps and a high pressure cold water return riser from floor 5 to 11 similar to the current installed hot water return. This scope of work was included in the final submittal after agreement from VA team at the 100% design review meeting. Please refer to the meeting minutes located in this Design Analysis document for further details.

8. Refer to the plumbing specifications for all new materials.

1. This project will include the installation of new valves, pipe, hangers, insulation, monitoring devices, and demolition in selected areas of the Miami VAMC facility.

2. This work will require phasing to be accomplished in the correct sequence.

Some of the project phasing can be accomplished concurrently.

3. Phasing shall be subdivided by area, wing, or floor as appropriate and as coordinated with the Miami VAMC facility operations.

1. VA Design Guides-Technical Information Library

2. Physical Security Design Manual for VA Mission Critical Facilities, January 2015.

3. Department of Veterans Affairs Plumbing Design Manual, November 2014, Rev May 1, 2018.

4. Florida Building Code – 2017 Edition

5. Florida Plumbing Code – 2017 Edition

6. Guideline for Design and Construction of Health Care Facilities, 2010 Edition

7. American Institute of Architects Academy of Architecture Health (AIA),

8. VA Directive 1061 Prevention of Healthcare-Associated Legionella Disease and Scald Injury from Potable Water Distribution Systems, August 13, 2014.

9. American Water Works Association (AWWA)

Project No.: 546-19-102

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G. Legionella Considerations:

1. This project scope is intended to address exterior site and interior building 1 water mains valves and riser deficiencies. However, during the course of reconciling scope with VA personnel on site and as documented in the review meeting minutes, some of the design does involve improvements that are intended to enhance or move toward compliance with VA design criteria related to prevention of Legionella in the water system. From field observations and 50% review conference discussions, it appears the VA Miami has implemented some of the VA Directive 1061 Prevention of Healthcare-Associated Legionella Disease and Scald Injury from Potable Water Distribution Systems, August 13, 2014. The water heater delivery temperature in building 1 is 140 degrees F. VA Miami has engaged a third party to do chlorine monitoring at various locations in the hospital.

Importantly, point of use mixing valves were observed at lavatory fixtures in areas where the A/E surveyed.

2. It should be noted that while separating the water heating systems by zone will allow better hot water supply and return control, it will not solve recirculation system short circuiting. This will only be completely resolved for the high pressure zone when the high pressure zone is completely horizontally converted. Low pressure zone return system deficiencies will not be resolved until the system is mapped, flow analyzed, flow balanced and upgraded.

3. The A/E suggests that the VA Miami develop an approach to accomplish the following:

4. Survey and map the entire water system for the hospital.

a. Identify dead end piping throughout the building to be removed to prevent stagnant sections of pipe.

b. Perform a system flow analysis to determine modifications required to the hot water circulation

c. Set up a monitoring system and connect to BMS.

d. Determine a master plan for implementing Prevention of Legionella compliance for any items that have not been previously addressed. As previously noted, VA Miami has already accomplished many aspects of compliance.

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G. Figures:

Figure 1 – Crawlspace – existing domestic water piping connected to the below grade 8” domestic water main

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Figure 2 – Crawlspace – existing domestic water system monitoring station to be reconnected and commissioned

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Figure 3 – Crawlspace – physical condition of the existing copper piping

Project No.: 546-19-102

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Figure 4 – First floor – domestic water booster pump room – existing isolation valve braised onto the copper domestic water piping

Project No.: 546-19-102

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Figure 5 – Eleventh floor – corridor – existing isolation valves braised onto the copper domestic water piping – access limited by electrical conduit and mechanical piping

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Figure 6 – Crawl space under Radiation Oncology – 6” water main tee off underground 8” water main.

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Figure 8 – Typical view inside tower chase where cold and hot water risers are located.

Bruce W. Carter VA Medical Center

IV. Environmental Narrative

Project No.: 546-19-102

Page IV-1

IV. Environmental Narrative

A. Goals and Needs:

This Project is planned to Upgrade Water Mains to Building 1 FCA-D and requires the removal of Transite-type pipe located below ground level in crawlspaces, beneath parking lot, concrete sidewalks, grass and landscaping areas.

B. Existing Conditions:

The existing Transite-type pipe will be removed to allow the installation of new non-asbestos piping. The removal of this Transite-type pipe is considered OSHA Class II work and EPA Category II non-friable material. It is estimated that approximately 1150 LF of 8” diameter Transite-type piping will be excavated and removed as part of this project.

C. Scope of Demolition:

Remove approximately 1150 LF of 8” diameter Transite-type piping and any contaminated soil, where pieces of Transite-type material is present.

D. Scope of New Work:

Not Applicable to this section.

E. Phasing

Phasing shall be coordinated with civil and plumbing work.

F. Codes and Standards:

1. VA Design Guides-Technical Information Library

2. Florida Building Code – Latest Edition

3. Florida Fire Code – Latest Edition

4. Chapter 469, Florida Statutes, The Asbestos Practice Act

5. Chapter 61E1, Florida Administrative Code for Asbestos License

6. Asbestos Program Rule 62-257, F.A.C.

7. Miami-Dade County Department of Environmental Resource Management, Air Quality Management Division, 701 N.W. 1st Court, Suite 400, Miami, Florida 33136.

Project No.: 546-19-102

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G. Items needed from the Government:

1. Review of design for approval and authorization to proceed with next submittal.

Bruce W. Carter VA Medical Center

V. Electrical Narrative

Page V-1

V. Electrical Narrative

1. The scope of this project is to replace the existing crawlspace cold water distribution piping, selective floor isolation valves and -floor horizontal piping conversion at the Miami VAMC. This will be performed to meet facility upgrade and modernization needs, and a better adherence to the VA guidelines.

2. The electrical component of this project shall be to provide the power as needed to support all new plumbing equipment and installation requirements.

B. Existing Conditions:

1. All new plumbing equipment requiring electrical connections will be located in the basement water heater room or second floor water heater room.

2. Existing 480/277 volt power panel CPA-5A and 120/208 volt power panel (unnamed and identified as panel X) in the basement water heater room are served by the Critical power branch and shall be utilized to provide power to all new plumbing equipment.

1. No electrical demolition is required for this project.

D. Scope of New Work:

1. Provide conduit and conductors as required to support the operation of all new plumbing equipment. Provide circuit breakers and overcurrent devices sized per NEC and equipment manufacturers specifications.

2. Provide new energy efficient LED light fixtures in chases to facilitate safe working conditions during maintenance and inspection operations.

Fixtures shall be manually switched and connected to existing lighting circuits.

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1. This work will require phasing to be accomplished in the correct sequence.

Phasing shall be subdivided by area, wing, or floor as appropriate and as coordinated with the Miami VAMC facility operations. Electrical work shall follow the phasing plan established for plumbing installation.

1. International Energy Code.

2. NFPA 70 - National Electrical Code.

3. NFPA 99 – Health Care Facilities

4. NFPA 101 – Life Safety Code

5. VA Electrical Design Manual for Hospital Project