Attachment_1_-_SOW_VC_Restroom.pdf

Hoover Visitor Center Parking Garage

Air Conditioning Unit Replacement

GENERAL REQUIREMENTS

1. Introduction

a. The Hoover Dam Visitor Center parking garage restrooms need a new air conditioning unit.

b. Hoover Dam is approximately 8 miles northeast of Boulder City, Nevada and 32 miles southeast of Las Vegas, Nevada in Clark County. The Visitor Center parking garage is located on the top of the Nevada side of the dam.

2. Background & Site Conditions

a. The purpose of this project is to replace the air conditioning unit for the Visitor

Center parking garage restrooms. The existing unit is in the attic, above the restrooms.

b. A staging area can be provided on the 5th floor of the parking garage. If necessary, the area near the restrooms can be occupied for bring or removing equipment from the attic; this must be scheduled with the COR.

i. The government will not provide fencing or security for staging areas.

c. The attic can be accessed by using a ladder. The ladder is a fixed ladder that is 13’ in height. The dimensions of the opening of the ladder are 80” x 36”. The removed and installed components must fit through this space. The height of the top of the handle loops are 43” above the floor of the attic.

i. The ladder can be removed if needed to facilitate moving the equipment if needed. After construction is finished the ladder must be reinstalled.

ii. There are two lifting lugs at the top of the ladder entrance way.

iii. Fall protection must be used when personnel are over 48” above the ground.

d. The attic has two rooms, which will be referred to as the main and back room. The main room has the existing air conditioning unit. The floor of the attic is concrete.

There are duct cutouts in the floor leading to the restrooms and the walls between the main and back room.

i. There is existing ductwork in the ceiling of the restrooms which will need to be connected to new ducting.

ii. The attic dimensions:

1. Main room: 26.5’ x 11’, which gradually tapers to 26.5’ x 15’

2. Back room: 11’ x 11’

iii. Duct cutout dimensions:

1. The cutouts in the floor and the wall between main and back room cutouts are 13” x 13”.

e. There are openings on the main room walls for the ductwork connecting to the air handling unit.

i. Refer to 45-D-17472 for wall opening dimension for ducting

f. 208/240 V power is available in the main room for the air handler and heat pump to tie into.

i. A 240 V, 60 Amp disconnect box is available in the main room.

3. Principle Components of Work

The project under this solicitation is to be completed in accordance with the contract provisions, clauses and requirements. The work must meet or exceed Air-Conditioning

Contractors of America (ACCA) Standard 5 and Assessment, Cleaning and Restoration

(ACR) of HVAC systems 2021.

The principal components of the work to be performed under this contract include:

3.1 Duct Cleaning:

1. The existing supply and exhaust ducting must be cleaned to ACR of

HVAC systems 2021 section 4.7 “Air Duct Cleaning”.

2. After the cleaning, the supply and exhaust ducting must undergo and pass NADCA vacuum testing per ACR of HVAC systems 2021 section 5.4 “Description of Method 2 for Non-Porous Surfaces –

NADCA Vacuum Test”.

a. The ducts must be cleaned until the results are satisfactory per

NADCA section 5.4.

3.2 Removal and disposal of the following:

1. One Carrier unit, model number 50AH060520. This unit is currently hanging from the ceiling

a. The weight of the unit is 590 lbs.

b. The dimensions of the unit are 4’ x 5’-5” x 1’-11 5/8”

2. Existing mini split AC units and all appurtenances

a. Blower unit

i. Two units are mounted in the ceiling; one in each restroom

b. Condenser units including their suction lines, liquid lines, and electrical conduit

ii. Two units are mounted to the southern facing wall openings in the main room.

1. The bottom on the condensers is 7’ from the ground.

2. The suction lines, liquid lines and electrical conduit to the condensers are approximately 30’ and 40’ in length.

3.3 Installation of the following:

All installation procedures must meet the manufacturers requirements and the following:

1. Install a variable speed, multi-position air handler; a Rheem

RH2V6024STANJA or equivalent. The air handler must meet the following salient characteristics:

a. Must have a nominal cooling capacity of at least 5 nominal tons.

b. Must have a nominal high CFM of 1800 or higher.

c. Must run on 208/240 V.

d. Must be compatible with the chosen 5-ton heat pump unit, AHRI match required.

e. Must have access panels for the filter, coil, and blower.

f. Must have a UV knockout port

i. UV light must be installed

g. Be positioned horizontally from the ceiling at the height of the existing wall supply air cutout, which is 7’ off the ground.

i. Must have the intake ducting connected to the wall opening nearest to the ladder on the southern wall.

ii. The suspended air handler must always hang securely, including when the unit is starting, stopping or running. The coil and blower panel cannot face the ceiling.

iii. Lines from the air handler must run neatly and on the surface of the walls and not be suspended in the air.

iv. Condensate drain line must be routed to the existing drain in the attic

2. Install a two-stage heat pump; a Rheem Classic Two-Stage Heat Pump

Model RP1660AJ1NA or equivalent is satisfactory. The heat pump must meet the following characteristics:

a. Use R-410A refrigerant

b. Must run on 208/230 V.

c. Must have a nominal tonnage of 5.

d. Must be installed with 4, 6” heat pump risers.

e. Must be compatible with the accompanying air handler AHRI match required.

f. Heat pump is to be installed outdoors, on the other side of the northern facing walls.

i. Penetrations for the refrigeration lines or electrical conduit must be made on the upper louver on the northern facing wall.

ii. Refrigeration lines must be neat, insulated and run on the surface of the walls and not be suspended in the air.

iii. Electrical conduit must be neat and run on the surface of the walls and not be suspended in the air.

iv. Heat pump must be lowered to the worksite from the second floor via crane or other approved lifting method. There is an approximate 10’ drop from the second floor to the worksite.

3. A programmable thermostat to regulate temperature of the restrooms at specific times of the day.

a. Must be compatible with the heat pump and air handler.

4. All ductworks must fit with the existing walls, floor openings and tie into the existing supply ducting.

a. No changes to the walls or floor are permitted in the attic.

b. Ducts connected to the air handler can be accessed in the attic, which feeds through a concrete floor, travels above the restroom ceiling to the supply vent.

i. Restroom ceiling is drywall. Removal for access is permitted.

The removed drywall must be repaired and painted so there is no discontinuity between the repaired section and the existing sections.

c. The supply air ducting from the air handler must be connected to the existing restrooms ductwork below the concrete slab.

i. The supply air duct must be 12” x12” to fit through the 13” x

13” wall and floor openings.

ii. Reducers from the air handler to the supply air ducts are permitted.

iii. New 12” x 12” ducting must run approximately 14, 16 and 31 feet (from the middle of the air handler intake opening) to penetrations through the slab.

iv. 12” x 12” 90-degree elbows are needed for two transition penetrations.

v. A 12” x 12” tee is need for one transition penetration

vi. Approximately 5 feet of 12” x 12” ducting is needed to get to the elevation of the existing ductwork at each penetration.

vii. Refer to 45-D-17472

5. For any brazing or soldering work, contractor must adhere to Hoover

Dam Hot work permit program. Approval of a hot work permit will be needed from Hoover Operations & COR prior to start of any hot work.

6. After installation, all features of the system shall be commissioned for proper operations.

a. If there are issues during commissioning, the contractor must rectify all issues.

4. Schedule

A site visit is necessary after the award but before submittal 3 is submitted. On-site work shall be accomplished during normal hours, which are from 0800 hrs to 1800 hrs, 8:00 a.m.

to 6:00 p.m., Pacific Time, - Monday through Friday. Submittal #1 through #3 must be completed within 21 calendar days from award. A Notice to Proceed (NTP) will be given after Submittal #3 is approved by the Government. Outages may be necessary to complete the work. Local outages are preferred.

Outages must be coordinated with the Contracting Officer’s Representative (COR):

a. Outage scheduling will depend upon power demand requirements and related operating conditions.

b. No specific outage request will be considered unless:

i. COR has reasonable assurances that materials and equipment required for work will be onsite.

ii. Contractor shall be prepared to perform work on date and during period of time requested for specific outage.

c. Allowable time and available outage periods will govern outage requests.

d. One supervisor/job supervisor for the contractor shall receive HECP training class, which is related to lockout tag out procedures. The Job Supervisor of the contractor will put his lock on the lock box and sign all necessary paperwork. No work will be allowed while this in process. The COR of the government will help in the process.

Results from the NADCA Vacuum Test must be submitted before the drywall is repaired.

As-built drawings of what is installed or modified must be submitted and approved before final payment will be authorized. The period of performance is 120 days after award.

5. Submittal Requirements

a. General - The Contractor shall furnish, for approval, the submittals identified in

Table 1.

Table 1 - List of Submittals

RSN

Submittals Required

Due Date

01 Air handler specification

21 days after award

02 Heat pump specifications 21 days after award

03 Installation plan 21 days after award

04 Site specific safety plan 7 days before on-site construction

05 Results of the NADCA

Vacuum Test

Before the drywall is repaired

06 As-built drawings 60 days after construction is completed

b. Submittals - The Contractor's cover on each submittal letter shall include reference to the job name and the Bureau of Reclamation purchase order number. Submittal review will require 14 days for review of each submittal or resubmittal, unless otherwise specified. Time required for review of each submittal or resubmittal begins when complete sets of materials required for a submittal are received and extends through return mailing postmark date.

c. Address - The Contractor shall provide one copy each of the submittals required by

Table 1 (List of Submittals) to the following Government employees. Submittals may be delivered by U.S Mail, FAX or E-mail to:

1. Larissa Bell

Contract Specialist

Bureau of Reclamation

Lower Colorado Regional Office

P.O. Box : TBD

Location: TBD

Email: TBD

2. Contracting Officer Representative

Alexander Smith

Attn: LCD-23000

P.O. Box 60400

Boulder City, Nevada 89006-0400

Phone #702-494-2369

E-mail adsmith@usbr.gov

d. Cost - All costs of furnishing submittals shall be at the Contractor’s expense and shall be included in the price bid schedule for other items of work.

7. Government Utilities and Facilities

The following Government facilities shall be available, upon request by the Contractor, at no charge for use in the performance of service and repairs as outlined in this statement of work:

a. Sanitary facilities

b. 120V electricity

8. Safety

The Contractor shall comply with all federal, state and local laws and standards as well as the

Bureau of Reclamation manual Reclamation Safety and Health Standards (RSHS), 2009

Edition. The Contractor may order the RSHS manual (Stock item GPO-024-003-00178-3) from:

The Government Printing Office

Superintendent of Documents

North Capitol and H St. N.W.

MS-SSMC - Room 566

Washington, D.C. 20401 mailto:adsmith@usbr.gov

The Contractor may also download or view the electronic version of the RSHS manual at no charge from the Bureau of Reclamation web site at:

http://www.usbr.gov/ssle/safety/RSHS/rshs.html

The contractor shall submit a Site Specific Safety Plan (SSSP) which addresses how work to be performed during this contract will comply with the applicable sections of the RSHS. If a section of the RSHS is clearly not applicable to the work being performed it should be identified as N/A. Section 3 of the RSHS outlines specific contractor requirements. Section

15 of the RSHS outlines the requirements for the control of hazardous energy

(lockout/tagout). The contractor must follow LCDO’s HECP and F-HECP procedures outlined in the FIST 1-1. Contractor must complete HECP Authorized employee training, to the level needed under FIST 1-1 and F-HECP.

9. Hazardous Materials

a. The Contractor shall be responsible for ensuring that no chemicals, grout, sealant, or other pollutants are released into the air, drainage system of the dam, or into the river.

b. The contractor shall maintain onsite the technical data sheet and SDS sheet for material used on site.

10. Protection of Existing Installations and Structures

a. The contractor shall safeguard the existing facilities and equipment from any harm resulting from their operations by the use of enclosures, drop cloths, coverings, etc.

Any materials necessary to provide protection of existing facilities and equipment will be furnished by the contractor, remains the property of the contractor, and upon completion of the work, will be removed from the facility area by the contractor.

b. The contractor shall repair, at the contractor’s expense, any damage to property caused by the contractor’s action or by failure of the contractor to adequately protect the property. If the contractor fails to make such repairs in a timely manner, the

Government may elect to repair the damage and to charge the contractor the cost of repair.

c. The contractor shall remove from Hoover Dam all removed components, unused materials, tools, and debris. The contractor is responsible for proper and legal disposal of all waste materials, oils and solvents according to hazardous waste disposal regulations. Clean up shall be inspected by Government and completed to http://www.usbr.gov/ssle/safety/RSHS/rshs.html the Governments satisfaction before final payment is made. All solid/universal waste and diversions must be tracked and reported as submittal 10.

11. Final Acceptance of Work

An inspection will be conducted by the Government at the completion of all work. When the work has been completed, inspected, accepted, and all submittals received and approved, final payment for the work will be authorized.

12. Access to the Construction Work Area

a. The Contractor shall coordinate and plan for access to the installation area with the

Government.

b. The contractor shall submit the following:

i. List of vehicles intended to drive into the powerhouse (limited to two (2) maximum). Make, model and license plate information shall be included.

ii. List of all personnel intended to work on the project.

c. The Contractor shall not block traffic with parked vehicles, equipment, and/or materials.

d. The Contractor shall place identification labels, with the Contractor’s name, on the windshield or doors of their vehicles parked at any location on the Hoover Dam site.

This shall not be required if the Contractor’s name is prominently displayed at some other location on the vehicle. No personal vehicles without identification labels will be allowed to be driven into the dam. All vehicles entering Hoover Dam are subjected to inspection.

13. Contractor Employee Security Requirements

a. The operation of Hoover Dam and Powerplant requires continuous and effective security measures. Contractor employees will be escorted during construction by a

Reclamation employee.