Attach 1 SOW Amend 3 1.15.21_ (002).pdf

NIST OFPM - Boulder

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STATEMENT OF WORK

Design Build Services for

Building 42 - Cooling Tower Capacity Upgrade Project

Design-and Construction

U.S. Department of Commerce National Institute of Standards and Technology

Boulder, Colorado Amendment 0003

1/15/2021

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PART 1 INTRODUCTION

The Department of Commerce campus is located at 325 Broadway in Boulder, Colorado and is a research & development facility. It consists of the agencies of NIST, NOAA and

NTIA.

See the NIST Boulder General Contractor Requirements document, included in the contract for information on rules and requirements of performing work on the National Institute of Standards and Technology (NIST) sites in Boulder and Ft. Collins, Colorado.

PART 2 BACKGROUND

Building 42, built in several phases starting in 2004 and is the Central Utility Plant (CUP) for the Boulder Facility. With the increasing demand on the facilities chilled water plant, NIST is replacing the current cooling towers with larger units to improve the performance of the chillers.

The chilled water plant operates 24/7/365, unscheduled interruptions are unacceptable.

PART 3 EXISTING COOLING TOWER SHUTDOWN

1. Cooling tower shutdown, removal and installation shall be phased and coordinated with the COR. Only 50% of the chilled water plant can be disabled at any time.

2. The chiller plant must remain operational, at a minimum of 50% always.

3. Provide any required temporary piping or valving to maintain plant operation while removing and installing cooling towers.

4. Cooling tower shutdowns require a minimum 2-week notification to COR, (Amend

0003).

5. Cooling tower shutdown and removal period shall be between September 1 and

March 31.

6. Full chilled water plant shutdown shall be coordinated with NIST, a 4-week notice shall be provided. Temporary air-cooled chillers shall be provided for any shutdowns extending longer than 8 hours, with a combined capacity of 1500 Ton.

Shutdowns shall not impact the boilers or any other function of the CUP, (Amend 0003).

7. NIST has (2) schedule CUP weekend shutdowns per year, (Amend 0003).

a. Spring Semi-Annual Shutdown: May 21, 22, 23

b. August Semi-Annual Shutdown: August 27, 28, 29

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PART 4 WORKING AT NIST

1. Comply with the attached project specifications and the attached “Boulder General

Contract Requirements”.

2. The design build team shall refer to existing facility construction drawings and project requirements.

3. The design build team shall verify the accuracy and correctness of all existing building information provided.

4. The design build team shall coordinate with the Government Contracting Officer’s

Representative (COR) all activities required throughout the duration of this contract. The Contractor shall communicate with the COR and the CO on all matters pertaining to the contract.

PART 5 SCOPE OF WORK

The project is to be performed at Building 42, NIST central utility plant. The scope of the project shall include but limited to the following work:

1. Cooling Tower Replacement

a. Remove the 4 existing cooling towers in a phased approach, to be coordinated with NIST.

b. Provide cooling towers, with a combined capacity to support a 6,000-ton chiller plant. Provide 4 new cooling towers, with the capacity of 1500 Tons each. (Amend 0002)

c. Cooling towers shall be able to turn down to 50% capacity. Cooling towers shall be sized to serve future chillers and turn down to 50% capacity to serve existing chillers. (Amend 0002)

d. Cooling towers shall be balanced to existing chiller flow requirements.

e. Cooling towers shall be selected for a 67 69 deg F wet bulb entering air temperature conditions. (Amend 0002)

f. Height of cooling towers shall not exceed height of Building 42.

g. Re-use/extend existing cooling tower foundation, provide additional foundations to the west to accommodate larger towers. Design build team shall provide a structural design of all modifications.

h. Provide additional and/or increase existing remote sump capacity as required for new cooling towers. Design build team shall provide a structural design of all modifications to existing sumps.

i. Re-pipe tower bypass as required.

j. Evaluate existing piping and pumping systems and identify potential deficiencies. Contractor shall verify existing chiller plant flows before performing any work. Measured flows shall be provided as a submittal.

(Amend 0002)

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k. Evaluate capacity of existing condenser water filtration system and replace as required. Evaluate existing condenser water piping and pumping system.

Increase pipe sizes and add or replace pumps as required to meet future condenser water flow. Pipe velocities shall not exceed ASHRAE recommendations. (Amend 0002)

l. Final design and layout to be reviewed by NIST. Design build team shall review existing conditions and propose options to be reviewed by NIST.

m. Final cooling tower selection and capacity shall be reviewed and approved by NIST. (Amend 0002)

n. Evaluate capacity of existing condenser water filtration system and add to existing or replace as required. (Amend 0002)

o. Future 1500-ton chiller condenser flow per tower is approximately 4500 GPM, with 75/84 F condenser water. (Amend 0002)

p. Existing chiller flows of 2300 GPM, with 68/75 F condenser water temperatures. (Amend 0002)

q. Condenser water filtration system shall be side stream, with a minimum flow of 35% of the system flow. (Amend 0003)

r. If required, new condenser water pumps shall be provided with VFD.

(Amend 0003)

2. Free Cooling Flat Plate Heat Exchanger (HX) and Cooling Tower

a. Evaluate required cooling tower capacity and either provide a new dedicated cooling tower to serve the heat exchanger or propose to relocate and re-use existing cooling tower(s) to serve the flat plate heat exchanger.

b. If existing cooling tower(s) are agreed to be re-used, the contractor shall coordinate with NIST to determine the appropriate towers.

c. Minimum required modifications to existing cooling tower(s), if re-used:

i. Bottom outlet.

ii. Make up water and fill control.

iii. Sump heater.

d. Provide supports and foundation, design build team shall provide a structural design of foundation.

e. Provide 2 condenser water pumps, lead stand by operation.

f. Pipe heat exchanger directly to cooling tower.

g. Either replace existing heat exchanger or increase capacity by adding an approximate 86 plates to maximize the HX frame capacity. The contractor shall verify the number of plates required to maximize existing HX frame.

h. Minimum final HX capacity shall be 1,650 Tons, 52 F EWT and 42 F LWT chilled water.

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i. Replace heat exchanger gaskets if existing heat exchanger is re-used.

j. Provide condenser water filtration system for flat plate heat exchanger system.

k. Provide a stand-alone free cooling system, not connected to chiller condenser water system. (Amend 0002)

l. Provide full flow high efficiency liquid-solid separators, with automatic flush.

Filtration shall remove solids size of 25 microns and larger. (Amend 0003)

m. Design build contractor shall evaluate chilled water pumps and determine the maximum allowable pressure drop across the heat exchanger. (Amend 0003).

n. If re-used, replace existing cooling tower media and spray system. (Amend 0003)

3. Pipe Painting

a. Field paint to match existing the following piping systems:

i. New interior and exterior condenser water piping.

ii. Existing unpainted interior and exterior condenser water piping.

4. Controls

The information below is provided for reference only. Offerors are directed to submit any questions in accordance with paragraph L-2, INQUIRIES AND QUESTIONS of this solicitation.

DO NOT contact the U.S. Census Bureau contracting officer or the ESCO contractor. (Amend 0002)

a. Coordinate control sequences with the existing ESCO contractor, JCI.

b. ESCO is an energy service company that develop, design, build, and arrange financing for projects that save energy, reduce energy costs, and decrease operations and maintenance costs at their customers' facilities.

The NIST and JCI partnership resulted in an ESPC, energy savings performance contract, contracted through the Census Bureau contracting office. The contract number is: YB132315CN0020.

i. Contracting Officer's contact is:

Thomas M. Sherman Procurement Chief / Contracting Officer Procurement Office Building 64 G National Processing Center U.S. Census Bureau

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Office 812.218.3351

Cell 502.435.4456

ii. Points of contact for JCI (ESCO contract) are: (Amend 0003) Yusuf Farran Yusuf.Farran@jci.com

Charles Tucker Charles.W.Tucker@jci.com

c. Update existing JCI control sequences as required. Final sequences to be reviewed by NIST. Coordinate with the local JCI controls representatives for the purpose coordinating project cost and design, (Amend 0003).

5. Balancing

a. Provide as a submittal, existing chilled water and condenser water flow measurements before making any changes to the systems.

b. Design build contractor shall perform pre-balance during peak cooling operations of the plant and shall coordinate day and time with NIST, (Amend 0003).

c. Final balancing of the chilled water plant, at a minimum shall include:

i. Chillers

ii. Chilled water pumps

iii. Condenser water pumps

iv. Cooling towers

v. Plate heat exchanger

vi. Plate heat exchanger pumps

vii. Condenser water filtration systems.

6. System Commissioning

a. Third party commissioning of the chilled water plant including flat plate heat exchanger. Commissioning agent shall be under contract to the contractor and report to NIST and the contractor.

b. Commissioning shall not be performed by representatives of the contractor nor the project design engineers.

c. Coordinate commissioning with ESCO contractor, JCI.

7. Construction Phasing mailto:Charles.W.Tucker@jci.com

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a. The design build contractor shall provide a construction and phasing schedule for review and approval, 45 days before any disruptive work at the CUP begins.

b. Construction shall be phased to where a minimum of 2 cooling towers shall always remain operational.

8. Design and Engineering

a. All engineering associated with the project, including stamped construction drawings and specifications.

b. Design shall comply with current state and local codes.

c. Design shall be reviewed and approved by NIST COR and NIST OSHE.

NIST OSHE shall issue a work permit once the design has been approved.

d. Phased construction, with coordinated shutdowns approved by NIST. See the NIST Boulder General Contractor Requirements document for notification requirements.

e. Detailed as-builts in PDF and AutoCAD format, shall be provided.

9. Use of Existing Documentation

a. The contractor shall review, and field verify all existing facility documentation provided by NIST.

10. Electrical Testing and Studies, (Amend 0003).

a. Provide the following electrical testing and studies for modifications to existing electrical gear:

i. Coordination Study

ii. Arc Flash Study

iii. Harmonic Analysis Study

iv. 3rd Party NETA Testing & IR scans (initial & follow up)

PART 6 GENERAL INFORMATION

1. Provide resumes for all individuals proposed for Key Personnel positions describing their experience with references, qualifications and responsibilities to the Contracting Officer for review. The Key Personnel for this project are listed below:

a. Project Manager **

b. Site Superintendent **

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c. Safety Manager **

d. Lead Mechanical Engineer

e. Commissioning Agent

2. The Project Manager (PM) must have a minimum 10 years’ experience as a

Project Manager on projects of similar in size and complexity to this project. The PM in this context shall mean the individual with the responsibility for the overall management of the project. Acceptance of Project Manager is required prior to start of construction.

3. The Site Superintendent must have a minimum of 10 years’ experience as a Site Superintendent on projects similar in size and complexity.

4. The Safety Manager must have a minimum of 10 years of construction experience, of which a minimum of 5 years of construction-related safety experience is included and must have completed the OSHA 30-hour Training Course. Completion of a 16-hour or 40-hour training course in the U.S. Corps of Engineers EM 385-1-1 Safety and Health Requirements Manual is recommended but not required. The Safety Manager will have overall responsibility for the safety of all contractor operations in accordance with the approved Safety Plan.

Duties will include safety training of contractor personnel, regular inspections of working conditions and practices for safety compliance, record-keeping and remediation of unsafe practices.

5. The Lead Mechanical Engineer must have a minimum 10 years’ experience as an engineer on projects of similar in size and complexity to this project. The Lead Mechanical Engineer in this context shall mean the individual with the responsibility for the overall mechanical design of the project.

6. The Commissioning Agent must have a minimum 10 years’ experience as a Commissioning Agent on projects of similar in size and complexity to this project.

The Commissioning Agent in this context shall mean the individual with the responsibility for the overall mechanical design of the project. for chiller plants of similar in size and complexity to this project. The Commissioning Agent in this context shall mean the individual with the responsibility for the commissioning of the chilled water plant. (Amend 0002)

7. **Note: This Key Personnel position must be an employee of the Prime Contractor.

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PART 7 CONSTRUCTION SCHEDULE

Preliminary Construction Schedule – provide a preliminary construction schedule in the form of a Gantt chart with the minimum milestones:

1. Design start

2. Design review submissions

3. Design review meetings

4. Foundation Installation

5. Underground piping installation

6. Cooling tower delivery dates

7. Free cooling system install

8. New Tower Install

9. Chiller Replacement Phasing Schedule

10. Anticipated Utility Outages

11. Equipment Start up

12. Commissioning

13. Balancing

14. NIST user Training

15. Close out

PART 8 SITE MOBILIZATION

NIST shall provide the Contractor an area immediately adjacent to the project site for construction and staging activities. Additional storage areas on the NIST campus may be available to the Contractor if approved by NIST.

PART 9 CODES AND STANDARDS

The work of the project shall be done in accordance with all applicable provisions of the appropriate codes and standards including the edition in effect as of the date of this solicitation: (Amend 0003)

1. International Building Code 2018 (Amend 0003)

2. International Mechanical Code 2018 (Amend 0003)

3. International Plumbing Code 2018 (Amend 0003)

4. International Energy Conservation Code 2018 (Amend 0003)

5. International Fuel Gas Code, 2018 (Amend 0003)

6. International Fire Code, 2018 (Amend 0003)

7. National Electrical Safety Code (NESC)

PART 10 SUBMITTALS

Quality Control Plans and Safety Plans shall be submitted no later than 15 days after award.