S02 8 578-17-012 Design Narrative.pdf

Department of Veterans Affairs Edward Hines Jr. VA Hospital

Hines, IL

Project Number 578-17-012

(VEG 19.19)

Replace AHU Bldg. 45 TO#2

100% Construction Documents

June 15, 2023

750 W. HAMPDEN AVE. #300

ENGLEWOOD, CO 80110

Ph (720) 550-6307

750 W Hampden Ave, Suite #300

Englewood, CO 80110

Ph (720) 550-6307 www.ValhallaEngineering.com

May 15, 2023

Alicia Brister, Contracting Officer Department of Veterans Affairs Great Lakes Acquisition Center 3001 Green Bay Road, Bldg. 1, RM 329 North Chicago, IL 60064

Subject: Replace AHU Bldg. 45 TO #2 Edward Hines Jr. VA Hospital, Hines, IL Project Number - 578-17-012 (VEG 19.19) Contract # - 36C252-19-D-0014 – 36C252-19-N-0544

100% Construction Documents– Modification 2

Project Scope of Work:

GENERAL:

Scope of work:

Modification 2 requires a study to determine changes required in the design per updates to the design manuals and comments by VA staff. Items in blue documents these changes, while the black text denotes items that did not change from the updated standards.

Modification 2 SOW:

1) VA design guidance PG-18-10 HVAC Design Manual, Revised March 1, 2022

January 2023 has changed significantly since this project was designed. A/E shall review the Manual to determine changes to design calculations, drawings, specifications, project book and other applicable documents.

2) A/E shall review the VA Office of Construction and Facilities Management (CFM) Technical Information Library (TIL) for updates to the Design Guides that were used in the design of this project. A/E shall determine changes to design calculations, drawings, specifications, project book and other applicable documents.

3) Revise the construction phasing plan to include two primary construction phases that will be vacated subsequentially by the User from the start of demolition until all construction work is completed. A/E shall also consider sub-phasing, such as individual rooms, that could be returned to service prior to completion of the entire phase.

a. Phase 1 shall consist of the Canteen function, including the Dining Room, Kitchen, Serving, Admin, mechanical/electrical rooms, rooftop, and associated areas. All functions in this area will temporarily relocate to allow contractor access throughout the area

b. Phase 2 shall consist of work in the Patriot Store, storeroom, restrooms, and other associated areas on the south end of the building. During this phase, the Patriot Store and storeroom functions will temporarily http://www.valhallaengineering.com/ relocate to the southern portion of the Dining Room. The northern portion of the Dining Room will be made available for Canteen customers.

4) Ensure the pressure reducing valve (PRV) to be outside of the customer access area to allow easier access for maintenance and repair.

5) Review and resolve the attached Project Review Comments provided by the AC Shop Supervisor

6) A/E shall prepare a list of proposed design changes for review by EHVAH personnel. List shall indicate the drawing sheet and detail or specification section and paragraph for the proposed changes. List shall also indicate if proposed changes are mandatory or optional requirements. EHVAH personnel will review and determine items to be included in the revised design.

7) A/E shall incorporate selected design changes into the construction contract drawings, specifications, project book, and other applicable documents.

8) A/E shall update construction cost estimate to include costs due to design changes and escalation.

Note: this Contract was modified per VA request after the 60% submittal. The bolded items indicated the change to this contract. Additionally, the MCC was increased to accommodate the additional scope to $2,050,000.

1) Under this Task Order contract, the A/E shall furnish multi-discipline architectural and engineering services for reports, planning and programming studies, investigations, testing, design concepts, design options, construction drawings and specifications, review of shop drawings, samples, equipment, data, and other related documents. The A/E firm shall provide professional services necessary for:

a. CLIN 1 – Investigation of existing conditions and design of the new building HVAC system. This item includes all work up to and including the completion of construction documents and bidding services.

b. CLIN 2 – Construction Administration. This item includes all work items commencing from the Post-Award meeting, through the construction phase, and including the project close out and as-builts. Also known as Construction Period Services (CPS).

2) Drawings, specifications and cost estimates shall include all facets of work and trades necessary to facilitate award of a construction contract. Construction period services are to include site visits during construction as part of the scope.

3) The A/E shall collaborate with the EHVAH’s designated PDT in the Design Phase and all the way through the Construction Phase.

4) The A/E shall be solely responsible for the management and professional design, including all associated labor, equipment, materials, mailing costs, testing, and inspections to meet the requirements of the contract to deliver the following:

a. Activities required during the investigative phase, include but are not limited to:

1. Review previous construction drawings.

2. Perform field investigations as necessary to become knowledgeable of current situation.

3. Review of conditions above acoustical ceilings and at access panels for drywall ceilings.

4. Investigating floors above and below, as necessary, for possible piping obstacles such as plumbing, ductwork, electrical, medical gases, and telecom.

b. Perform field investigations to identify deficiencies in the current building systems.

c. Provide a progress schedule showing percent of work completed and weekly status updates throughout the project.

d. Provide an updated, detailed Construction Cost Estimate for each option, and at each progress submittal phase. The A/E shall notify the COR at any point if the working cost estimate exceeds the VA budgeted amount.

Should that occur, the A/E shall make recommendations to bring the estimated cost within the budgeted amount.

e. The A/E shall complete the design package to include plans, details, sections, elevations, shop drawings, construction drawings, edited specifications, site visit reports, detailed construction estimate, and all related information as required by the contract.

f. The A/E shall submit a QA/QC template for review. Template shall have a signature block for the QA/QC reviewer. If a QA/QC template is not approved by the COR, then the A/E will utilize the checklist provided in Attachment 12 in coordination with the COR.

g. The A/E shall provide Construction Administration Services as a separate line cost in their proposal.

5) End-user Design Parameters: The design shall consist of several end-user design parameters that must be included with the design and will be used to measure the success of the overall project. The parameters include, but are not limited to the following:

a. Functionality: The existing facility HVAC system shall be upgraded and repaired to include the following major items of work:

1. Replace existing air handling units (AHU) serving the building. AHU’s are connected to the central campus steam lines, and the chilled water system in Building 200.

2. Remove the non-functioning rooftop make up air unit. Determine if unit shall be replaced or abandoned. If abandoned, patch and repair roof area after removal.

3. Evaluate the existing steam and chilled water piping systems and repair or replace piping, valves and other components as required.

Note: Steam line connection point is the existing riser in the water heater closet adjacent to the Women’s Restroom.

4. Evaluate the need for and condition of existing exhaust fans. Remove, replace, and/or consolidate units as necessary. Patch the area where any exhaust fans or ductwork will be removed.

5. Evaluate the need for and condition of the kitchen ventilation systems.

Remove, replace, and/or consolidate units as necessary. Patch as required.

6. Install new natural gas line from the service meter in the NW Mechanical Room to the gas line in the steam tunnel in the outer corridor of Building 1. This line will replace the existing leaking natural gas line.

b. Communication. See specifications in Attachment 13. A/E to determine the data and connectivity requirements for HVAC and controls systems.

1. Remove the existing HVAC control system.

2. Install a new direct digital control building automation system to be seamlessly integrable with the Hines VA Campus current JCI Niagara 4 platform. Controls shall be a new, open network, contractor line, BACNET compatible, Tridium based control system.

c. Electrical:

1. Evaluate the capacity of the existing electrical system. Upgrade as necessary to accommodate new HVAC equipment.

2. All electrical distribution panels shall be labeled with its power source information (i.e. the circuit feeding it).

3. Remove outdated lighting fixtures throughout the area and replace with new fixtures to accommodate the revised ceiling layout. New fixtures shall meet current energy efficiency standards and match existing fixtures in use throughout the Campus. Replace lighting controls as necessary or required ASHRAE standards.

4. Upgrade the existing electrical system as necessary to accommodate the new lighting fixtures and system, and to be in compliance with current electrical codes. Replace outdated or obsolete panelboards.

d. Energy: The design shall include Energy Star rated materials and equipment or a VA approved equivalent to the greatest extent possible.

All HVAC equipment shall conform to The American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE) design and energy efficiency standards.

e. Hazardous material:

1. Asbestos Containing Material (ACM) is present in the project area and must be abated. See Asbestos Survey in Attachment 18.

2. Based on the age of the building, lead-based paint may be present.

Evaluate likely locations, test, and abate as required.

A. Site Development

Not required Site location shown on cover sheet.

B. Architectural

The architectural scope consists of complete removal of existing acoustic ceilings and lighting and installation of new acoustic ceilings throughout with new light fixtures. Portions of existing soffits may need to be removed and reconstructed due to duct work demolition and replacement.

Existing roof penetrations will be modified, as needed, based on new mechanical equipment requirements. Any roofing work and materials will match existing roofing material. A new pre-engineered steel stair will be installed on the exterior south wall of the existing building for roof access by facilities maintenance staff or contractors. The stairs will have a concrete landing and a security fence with gate around the perimeter.

C. Fire Protection

Minor Fire Protection is required including smoke duct detectors. Relocate fire alarm and sprinkler heads as required, connect back to existing main systems.

D. Interior Design

Not required by scope.

E. Structural

The roof and the applicable support was designed in accordance with AISC 360 and AISC Steel Manual. The adjusted loads of the MOD-2 roof top equipment will be evaluated, the required structural steel roof top framing will be updated accordingly. All loads applied to roof structure to determine the structural adequacy were in accordance with ASCE 7 and VA Structural Design Manual dated Oct. 1, 2022. The structure was determined to adequately support the new AHU by utilizing a support that carried most of the load directly to the columns as the existing steel beams were not adequate to carry the full load of the AHU.

F. Plumbing

G. Sanitary

H. HVAC

The renovated space will be provided with conditioned air to meet or exceed the minimum requirements as addressed by the January 2023 HVAC Design Manual.

All mechanical systems in Building 45 will be removed and / or replaced. There are two (2) air handling units and 1 make up air unit that will be removed. Steam service and chilled water service will be replaced back to mains in the corridor. All ductwork will be replaced. Due to the change of scope in the modification, the existing ceiling will be replaced, to include air terminals. Existing pneumatic controls will be replaced with a DDC system. Controls shall be a new, open network, contractor line, BACNET compatible, Tridium based control system. This system shall be seamlessly integrable with the existing JCI Niagara 4 platform.

The building will be served by one (1) Air Handling Unit (AHU-1) located on a new curb and one (1) Make-up Air Unit (MAU-1) located on the roof. Building 1 consists of the Veterans Canteen Services store, dining area, restroom and kitchen. MAU-1 shall only serve the kitchen.

A lead-lag steam to water heat exchangers and heating water pumps shall be used to generate glycol heating water service for AHU-1, MAU-1 and VAV systems. Heating water shall be 40% propylene glycol to prevent freezing.

The VA has an option to use either a steam or gas fired MAU-1. It was determined during the 35% review meeting that the VA prefers steam service to the MAU-1.

During the code review, the VA requested changing the MAU-1 to a glycol heating coil. This design has been developed, upsizing pumps and heat exchangers. MAU-1 will be tied into a new Demand Control Ventilation system that will automatically adjust exhaust fans and supply air based on kitchen meal preparation requirements.

There are nine (9) existing exhaust fans. The project intent is to replace these with up blast exhaust fans, however, EF-1 has connections to a grease hood and an exhaust grille. These will be separated to meet current codes. The Contract Drawings provide design for 7 roof mounted exhaust fans and 1 ceiling exhaust fan.

A chilled water to glycol chilled water gasketed plate heat exchanger will be used to generate 40% Propylene Glycol (PG) chilled water for MAU-1 and AHU-1. This equipment is required for freeze protection. This will allow for easier maintenance and prevent chilled water coils from bursting.

Existing steam cabinet heaters in the kitchen will be replaced with heating water cabinet heaters. These will be used to provide kitchen heating requirements when the kitchen is not in use, which will allow MAU-1 to remain in the “off” position.

For Construction scheduling, we anticipate 3-4 months for startup and equipment purchasing. Once equipment is ready we anticipate 3 months of work per phase.

I. Electrical & Lighting

There are three electrical panels in the mechanical room and adjacent area. Panels have enough capacity and breaker space for the new air handler, fans, and other electrical loads that may be needed. However, transformer will need expanded capacity to new loads. Updated equipment will resize circuits, to include breaker, conduit, and conductor. This will be known after new mechanical equipment selections. Existing Federal Pacific Electric equipment within scope will be replaced, which will include breakers serving existing loads. Any additional electrical equipment deemed beyond its remaining useful life by VA or site inspection will be replaced which will include breakers, disconnects, panels, conductors, conduits, junction boxes, etc. Old disconnecting equipment serving the existing mechanical equipment will be replaced with new disconnects to serve new mechanical equipment.

Additional spaces will receive access controls that tie back into the building system.

Access controls will include a card reader and necessary camera for surveillance.

All existing interior light fixtures in the scope of the project will be replaced with new LED luminaires. The characteristics of the luminaires are multi-volt, 3500K, minimum of 80 CRI, and 0-10VDC dimmable. In the kitchen and utility areas, the lighting shall be 4000K color temperature for increased visual acuity.

New LED exterior wall mounted luminaires shall replace the existing luminaires in the kitchen and utility areas, the lighting shall be 4000K color temperature for increased visual acuity along the west exterior wall. These characteristics of these luminaires shall be multi-volt, 4000K, minimum of 80 CRI and be provided with integral photocells. The existing exit signs, emergency battery fixtures shall remain and not be replaced. The existing track lighting in the VCS store will remain and not be replaced.

The existing facility with be provided with new automatic lighting controls within the project scope area. The dining/servery area, corridor, vending area and lobby along with the VCS store shall be provided with networked occupancy sensors and switches. These areas shall also be provided with a time clock to hold the lighting on during normal business hours. After normal business hours, some lights will be designated to be on 24/7 for walkthrough lighting. When a person enters these areas after normal business hours, the occupancy sensors will turn the lights on until the area is vacated when once again the lights will be automatically turned off and only the walkthrough lights will remain on.

The lighting in the kitchen will be turned on by either automatically with a time schedule or manually with a light switch. The time schedule function will hold the lighting on during normal business hours. After normal business hours, some lights will be designated to be on 24/7 for walkthrough lighting. When a person enters these areas after normal business hours, the occupancy sensors will turn the lights on until the area is vacated when once again the lights will be automatically turned off and only the walkthrough lights will remain on.

Non-public areas such as offices, storage rooms, housekeeping, toilets will be provided with line voltage automatic lighting control devices including switches with integral occupancy sensors or ceiling mounted occupancy sensors.

J. Steam Generation

Not part of this project

K. Steam Distribution (Outside)

Not applicable.

L. Solid Waste Disposal System

M. Automatic Transport

N. Asbestos/Lead/Mold Abatement

Asbestos abatement will be included in the design in the form of specification sections. Due to the age of the building, the need for removal of lead paint during the construction phase is likely.

O. Space Planning

P. Critical Path Method (CPM)

Not required with this submittal.

Q. Estimating

We have included cost estimate for this submittal based on RMS means data. The estimate is currently at $3,649,830 which is over the original MCC of $2,050,000 set by the previous MOD 1 for additional work. Additional work is shown on the drawings. Some of the new work includes the replacement of ACT Ceilings, and all new Lighting throughout Building 45, and a new main gas line installed exterior to the building on the Roof. This includes a heavy contractor mark-up based on time escalation from the original estimate in 2020, and the additional mod 2 cost for air handlers and other specialized mechanical equipment.

R. Specifications

Specifications are provided. All specifications have been edited from the VA TIL or were edited from the specifications the VA Hines team provided. Spec edits have been removed from this submittal.

Issues to be resolved:

None at this time.

Respectfully submitted, Valhalla Engineering Group

Mark Rohall , P.E.

Project Manager cc: Ernest Wright, VA COR Sam Lundgren, Valhalla Engineering