1333ND21RNB190002 0003.pdf

Offers must acknowledge receipt of this amendment prior to the hour and date specified in the solicitation or as amended, by one of the following methods:

(a) By completing items 8 and 15, and returning or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGMENT TO BE RECEIVED AT THE PLACE DESIGNATED FOR THE RECEIPT OF OFFERS PRIOR TO THE HOUR AND DATE SPECIFIED MAY RESULT IN REJECTION OF YOUR OFFER. If by virtue of this amendment you desire to change an offer already submitted, such change may be made by letter or electronic communication, provided each letter or electronic communication makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

E. IMPORTANT: Contractor is not is required to sign this document and return copies to the issuing office.

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 1. CONTRACT ID CODE

2. AMENDMENT/MODIFICATION NUMBER 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQUISITION NUMBER 5. PROJECT NUMBER (If applicable)

7. ADMINISTERED BY (If other than Item 6) CODE

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICITATION NUMBER

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NUMBER

10B. DATED (SEE ITEM 13)

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers is extended. is not extended.

12. ACCOUNTING AND APPROPRIATION DATA (If required) copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted;

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NUMBER AS DESCRIBED IN ITEM 14.

CHECK ONE A. THIS CHANGE ORDER IS ISSUED PURSUANT TO: (Specify authority) THE CHANGES SET FORTH IN ITEM 14 ARE MADE IN THE CONTRACT ORDER NUMBER

IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority)

Except as provided herein, all terms and conditions of the document referenced in Item 9A or 10A, as heretofore changed, remains unchanged and in full force and effect.

15C. DATE SIGNED

15A. NAME AND TITLE OF SIGNER (Type or print)

16C. DATE SIGNED

16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

14. DESCRIPTION OF AMENDMENT/MODIFICATION (Organized by UCF section headings, including solicitation/contract subject matter where feasible.)

PAGE OF PAGES

6. ISSUED BY CODE

8. NAME AND ADDRESS OF CONTRACTOR (Number, street, county, State and ZIP Code) (X)

CODE

15B. CONTRACTOR/OFFEROR

(Signature of person authorized to sign)

16B. UNITED STATES OF AMERICA

(Signature of Contracting Officer)

Previous edition unusable

Attachment Page

PAGE 2 OF 20 1333ND21RNB1900020003

The purpose of this amendment is to incorporate the following changes:

A. Wage Determination CO20200017, dated 08/28/2020 is hereby deleted in its entirety and replaced with the attached Wage Determination CO20210017-01, dated 01/15/2021.

B. Questions and Answers (#57-138) are hereby incorporated.

C. The Site Visit Attendee List from 12/16/2020 is hereby incorporated.

D. The Statement of Work is hereby replaced in its entirety (Attachment 1). Changes are highlighted and annotated in Red Text.

E. The Project Summary is hereby replaced in its entirety (Attachment 3). Changes are highlighted and annotated in Red Text.

F. The Demonstration and Training document is hereby replaced in its entirety (Attachment 8).

Changes are highlighted and annotated in Red Text.

G. The Chiller Plant Commissioning Requirements is hereby replaced in its entirety (Attachment 9). Changes are highlighted and annotated in Red Text.

H. The Direct Digital Control (DDC) System for HVAC document is hereby replaced in its entirety (Attachment 10). Changes are highlighted and annotated in Red Text.

I. The Cooling Tower Requirements is hereby replaced in its entirety (Attachment 11). Changes are highlighted and annotated in Red Text.

J. Attachment 27 – Chilled Water Enhancements, Attachment 28 – Cooling Tower Foundations and Sump Layout, Attachment 29 – CUP Control Modifications, Attachment 30 – CUP Elec One-Lines & Attachment 31 – Variable Frequency Drive Requirements are hereby incorporated.

K. As a result of D-J, the List of Attachments is hereby replaced in its entirety. Changes are highlighted and annotated in Red Text.

L. CLIN 0001 on the Schedule is revised to include lines for the contractor to propose a period of performance for design work and construction work.

M. The proposal due date, block 13a of the SF 1442, is hereby changed from Jan 22,2021 at 2:00PM MT to Feb 5, 2021 at 2:00PM MT.

N. No other changes occur as a result of this amendment.

SCHEDULE Continued

ITEM NO. SUPPLIES/SERVICES QUANTITY UNIT UNIT PRICE AMOUNT

0001 The contractor shall provide all labor, materials and equipment for the design and renovation of Building 42 Cooling Towers, in accordance with the Statement of Work and other attached documents.

Provide the following price breakdown:

Design Costs $___________

Construction Costs $__________

Propose a period of performance for the following:

Design:___________________________

Construction:_______________________

1.00 LS

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Table of Contents

SECTION J LIST OF ATTACHMENTS

J.1 Questions & Answers

J.2 List of Attachments

J.3 Site Visit Attendee List 12/16/2020

J.4 Wage Determination

PAGE 4 OF 20 1333ND21RNB1900020003

SECTION J

LIST OF ATTACHMENTS

J.1 Questions & Answers

PAGE 5 OF 20 1333ND21RNB1900020003

Question Answer

Please confirm the HX is Alfa Laval. If so, please provide the serial number.

The government has provided the HX submittal for reference.

Please refer to the attached HX submittal (Attachment 27), PUMP PACKAGE with HX 15541-01B.

Is the existing water side economizer functioning?

Is NIST wanting to take it off the mechanical cooling towers to simplify transition from economizer to mechanical cooling, or are they wanting to separate it out because it’s not working and they believe that’ll help?

a. Yes the water side economizer is functioning. The intent of the water side economizer system modifications HX is to provide a dedicated cooling tower, pumping and piping system for the system. Providing (2) two condenser water systems. With a condenser water system serving the 4 chillers and a separate system serving the water side economizer Heat Exchanger.

b. The chillers do not operate with the low condenser water temperatures required for the water side economizer system.

The RCx of the existing chiller plant, it’s a variable primary plant, are their specific known issues they are trying to solve? There’s no design review requested by the Cx scope, but given the schematics they provided there are some improvements available. Specifically the location of the new flow meter on the chilled water distribution should be moved prior to the take off’s to the CUP AHU’s, the maximum rate of change of flow allowable through the chillers will be critical to reliable operation as well as chiller min/max flows/temps and the configuration of the chillers themselves (assumed to be variable speed screw chillers for this application), the physical location of the system DP and total system by-pass will need to be known. It’s curious because these schematics appear to be the current condition of the chiller plant from a previous project, just curious what the extent of correcting current plant operations is expected.

This amendment significantly revises Attachment 9, Chiller Plant Commissioning Requirements.

Refer to Attachment 9, Chiller Plant Commissioning, Amendment 0003.

The scope of work includes re-pipe of tower by-pass as required, is the intent to maintain the current function and re-pipe to physically fit the new towers? Or is there a functional issue that NIST is desiring resolution to?

The purpose of the tower bypass lines was to warm up the sumps, the design build contractor shall review the need of the cooling tower by-pass’s during the design.

Cx scope doesn’t really address Retro-Cx of the chiller plant, so scoping and interaction with the maintenance staff to understand their problems will be critical. If the Cx of the chilled water side is just to verify the existing operation is un-impacted by this project, that’s a much simpler task. Then it’s just Cx for the condenser water system and the condenser water side of the chillers. Is the desire for Cx of the whole chilled water plant, or just the condenser water side of the plant plus the HX tie in on the Chilled water side?

This amendment significantly revises Attachment 9, Chiller Plant Commissioning Requirements.

Refer to Attachment 9, Chiller Plant Commissioning, Amendment 0003.

In regards to the required project schedule, how many days does the government require to review the 60% design submittal? The 90% design submittal? And the 100% design submittal?

a. NIST will make reviewing design submissions a priority, but 21 calendar days would be required.

b. The design build team shall coordinate with NIST, review meetings for the 60% and 90% design submissions.

In regards to the project schedule, will there be a 100% corrected design submittal activity?

If so, how many days will the government require to review?

NIST is expecting all government comments are incorporated in the 100% review set and 10 calendar days are required for review.

In regards to the schedule, what window of time (duration) will be required for each submittal review? Should the contractor hold 1 weeks time for scheduling purposes?

NIST will make reviewing equipment submittals a priority, but 21 calendar days would be required.

In regards to the schedule, is “Fast Tracking” required or allowed?

The Design build team shall complete the scope of work within the period of performance allowed, NIST does not have a requirement for or against fast tracking.

In regards to the schedule, can construction activities commence before 100% design is complete?

Yes, the design build team can submit phased design or trade specific submissions for review, approval and early construction.

In regards to the schedule, can long lead submittal items be submitted in the 60%, 90% and 100% design submission?

Yes, NIST shall review submittals of long lead items during design submission.

During the site walk the concrete in the basement appeared to be colored. Does the new concrete pad in this room need to be colored? If so, please provide color.

Coloring of concrete pads is not required.

For the exterior cooling tower foundations, can we abandon the existing western foundation beam in place?

Yes, the western cooling tower foundations can be abandoned if they do not inhibit upon servicing or operation of the cooling towers

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Question Answer

For the exterior cooling tower foundations, can we use aluminum wall ties that break off at the surface? Is an architectural finish required over broke off wall ties?

Design build team shall provide design structural design drawings for cooling tower foundations. Material finish shall be reviewed during the design process.

Do the sump pit walls at the exterior foundations need to be extended to the west on BOTH sump pits?

Design build team shall verify required remote sump pit volume.

Do the existing gas lines interfere with the potential cooling tower location to the south?

Design build team shall verify location of underground utilities.

Please confirm the new concrete pad in the basement can be placed on existing slab and does not need to be cut in.

Design build team shall provide design drawings for concrete pads.

Please provide submittals for the existing electrical buckets to verify their capacities.

Refer to the attached NIST-CUP Motor Control Submittal and CUP Elec One-Lines Amendment 0003. (Attachments 29 & 30)

Wanted to clarify question 16. Can one person perform the role of Superintendent, SSHO (Site Safety Health Officer), and QC on this project?

Or will a separate QC position be required on this project?

As stated in the response to question 16 in Amendment 0002, there is no prohibition on individuals performing multiple roles however, the number or roles an individual is assigned may be seen as a performance risk.

Attachment A - Construction & Design Experience Project Data Sheet Per provision L-16, Instructions to Offerors, para L-4.1.1.4 and L-4.1.2.4 Attachment A - Construction & Design Experience Project Data Sheet is a mandatory form to be used to submit project information. The form is required if the offeror is utilizing relevant experience from a subcontractor or other teaming member.

The offeror's attention is also called to provision L-16, Instructions to Offerors, para L-4.1.1.8 if utilizing relevant experience from a subcontractor or other teaming member that they propose to use; however, the offeror must also submit a signed copy of a joint venture agreement, partnership agreement, teaming agreement, or letter of commitment for the subcontractor or teaming member.

Attachment B - NIST AMD Boulder Past Performance Questionnaire

(PPQ)

Per provision L-16, Instructions to Offerors, para L-4.3 FACTOR

(3) - Past Performance Attachment B, PPQ is required if there is no CPARS, CCASS, or ACASS Evaluation available for a project submitted under Factor 1 for both Construction Experience and Design Experience.

Attachment C - Resume Form For Key Personnel This form must be submitted for each person filling a Key Personnel position. See clause G.3, 1352.237-75 KEY PERSONNEL, page 11 of 59 and provision L-16, Instructions to Offerors, para L-4.4.3 Note that Project Manager, Site Superintendent and Safety Manager must be employees of the prime contractor.

Attachment D - Key Personnel Qualifications And Statement Of Understanding Attachment D should be completed by the offeror and included as part of the proposal as submitted.

Project bid documents state the contract shall be for a complete project duration of 365 days.

It is my understanding the project shall take place starting around June 2021 and finish around March 2023. Would you confirm the project dates? We believe the outages shall be done in two phases (2) units to be swapped out in the September 2021 to March 2022 range and the second set of (2) units to take place between September 2022 and March 2023 (which suggests more than 365 calendar days to complete the project). Please provide more clarification on the project schedule.

The project period of performance of 365 days begins at issuance of the Notice to Proceed. See SF 1442, Block 11 and Clause F.2, FAR 52.211-10,COMMENCEMENT, PROSECUTION, AND COMPLETION OF WORK

The Statement of Work, Part 3, paragraph 5, and Project Summary, Part 1, paragraph 1.6 both indicate that cooling tower shutdown and removal period shall be between September 1 and March 31.

No specific year is given in either document nor is there any requirement or the work to be accomplished in 2 phases.

Will you provide tunnel and pipe support detail drawings for building 42, similar to drawings ST3-01 through ST3-12 for building 6 and 7, for bidding purposes?

Refer to Phase 2 construction drawings provided with amendment 0002.

Will you provide tunnel plans for building 42, similar to drawings ET1-01 through ET1-04, ET4- 01, and ET17-01 for buildings 6 and 7, for bidding purposes?

Refer to Phase 2 construction drawings provided with amendment 0002.

In regards to bid documents "Attach A, B, C, and D"; are these items specific to the General Contractor's (GC)

PAGE 7 OF 20 1333ND21RNB1900020003

We understand that JCI will have ownership of the controls package for this project. Will you confirm they are responsible for the purchase and installation of any/ all necessary control devices, raceways, wiring, terminations, programming, and testing of these components for this project? If the Electrical contractor is to be responsible for any of these items, would you please identify in detail, which items?

The prime contractor is responsible for providing all necessary control devices, raceways, wiring, terminations, programming, and testing of these components for this project.

As the controls are proprietary to JCI the prime contractor shall insure that all necessary control sequence changes as required by the engineer of record are coordinated with the ESCO and performed by a qualified JCI technician.

The Statement of Work (Part 5.1.e) indicates cooling towers to be selected for a 67 deg F wet bulb entering air temperature. The Cooling Tower Specification (page 6, 2.7.D. Airside), indicates an Entering Air Wet-Bulb Temperature of 69 deg F. The original tower selection indicates towers were selected for 49 deg F WB.

ASHRAE design WB temperature is 59F. Which is correct?

Please refer to the revised SOW, Part 5, paragraph .1.e, Amendment 0002, Attachment 1 which reads: e. Cooling towers shall be selected for a 67 69 deg F wet bulb entering air temperature conditions. (Amend 0002)

The Cooling Tower Specification (page 6, 2.7.C.

Waterside), indicates Entering and Leaving Water Temperatures as 85 deg F and 75 deg F respectively (10 degree delta T/ (3) GPM/ton) with a flow rate of 5,411 GPM (flow at 3 GPM/ton would be 4,500 GPM). The 1500 ton chiller data sheet indicates Entering and Leaving Water Temperatures as 85 deg F and 70 deg F (15 degree delta T/ (2) GPM/ton) respectively with a flow rate of 2,648 GPM (167.7l/sec). Which is correct?

Please refer to the SOW (Attachment 1)Part 5, paragraphs 1O and 1P as added by Amendment 0002.

Is enhanced commissioning required for this project?

This amendment significantly revises Attachment 9, Chiller Plant Commissioning Requirements.

Refer to Attachment 9, Chiller Plant Commissioning, Amendment 0003.

Will the government perform all project risk hazard assessments if it has not already ready been done or will the design-build team be performing the risk assessment?

The design-build team shall be responsible for performing the risk assessment.

Confirm standard / permissible work hours during construction.

Please refer to NIST Boulder General Contractor Requirements - Rev C., section 3.1 Hours of Operation (Attachment 2)

Please confirm that the Government will allow proposers a minimum of seven (7) days to respond to the RFP starting from the date that the Government responds to 100% of the RFIs received.

The government will take all factors into account when establishing RFP closing date as a result of this amendment.

Would the government please provide the up-to-date electrical one-line diagrams or schedules for the motor control centers? Amendment 0002 provided electrical drawings for Phase 1, 2, and 3 of construction. Phase 1 has motor control center schedules, but they do not match what is installed at the plant. Phase 2 and 3 do not have motor control center one-lines or schedules.

The motor control submittal and construction drawings were provided in amendment 0002. Please refer to Phase 1 mechanical and electrical set dated 11/4/1994 and attached CUP Control Modifications Bid Documents (Attachment 29).

Section L-4.1 FACTOR (1) – Experience (Construction and Design) under L-4.1.1.3 and L-

4.1.2.2 states that, “Projects submitted… shall be completed within the past five (5) years of the date of issuance of this RFP.” Would the government be willing to accept projects that are ongoing with at least one (1) year of experience completed?

As indicated in Section L-4.1.2.2 Projects submitted shall be completed within the past five (5) years of the date of issuance of this RFP. For design-build projects, the design portion of the contract shall have been completed within the past five (5) years of the date of issuance of this RFP.

Would the government please provide the working volumes of the existing cooling tower sums?

Design build contractor shall verify all dimensions and volumes of existing sumps.

Would the government please confirm whether electric heaters are required in the existing and/or new cooling tower sumps?

Design build contractor shall verify and provide sump heaters if required in the existing sumps. The SOW (Attachment 1), Part 5.2 requires sump heater for the cooling towers serving the heat exchanger.

Would the government be willing to schedule another site visit on Jan 11th or 12th for us to verify our approach to the project?

No, multiple site visits have been conducted. No additional site visits will be conducted.

PAGE 8 OF 20 1333ND21RNB1900020003

Attach 16 is a condenser water schematic drawing (dated 9-01-2020). It is unclear if this drawing is intended to be an as-built of existing conditions or to show new work. During the site walk we noticed that multiple devices shown on this drawing are not installed. Of all the devices shown on this drawing, which devices are we to include in this project?

Attachment 16 is an as-built from a previous project. Please refer to attached CUP Control Modifications Bid Document (Attachment 29). All drawings are provided for information only and the contractor is responsible for verifying field conditions.

As the Controls are under a Performance Guarantee (PC) contract, is the contractor responsible for the sequence, submittal, identification of available spare points, additional controllers, controls wiring, demo of the controls, layout, and rewiring and database modification of any new controls?

The prime contractor is responsible for providing all sequence changes, submittals, identification of available spare points, additional controllers, controls wiring, demo of the controls, layout, and rewiring and database modification of any new controls.

As the controls are proprietary to JCI the prime contractor shall insure that all necessary control sequence changes as required by the engineer of record are coordinated with the ESCO and performed by a qualified JCI technician.

Is the contractor responsible for any controls hardware or software upgrades to the system or graphic modifications?

The prime contractor is responsible for providing all controls hardware or software upgrades to the system and graphic modifications

As the controls are proprietary to JCI the prime contractor shall insure that all necessary control sequence changes as required by the engineer of record are coordinated with the ESCO and performed by a qualified JCI technician.

Attachment 1 SOW part 5.1.k – Is there a specific level of redundancy required for the final configuration of the condenser water pumps (i.e., n+1)?

NIST has and requires N+1 redundancy for chillers, towers and pumps. The chillers and cooling towers currently have N+1, the plant was designed to run 3 chillers and 3 cooling towers, during peak cooling.

Attachment 1 SOW part 5.2.h – Can you please clarify the design ambient wet bulb temperature at which the desired minimum free cooling HX capacity of 1,650 tons, 52 EWT and 42 LWT chilled water is to be provided?

Contractor to verify ambient historical Boulder wet bulb temperature during periods when ambient dry bulb temperature is 42 F and below.

Attachment 1 SOW part 5.2.j – Is the desired filtration system for the flat plate heat exchanger system to match the configuration of the current condenser water filtration system (combination of sweeper system and full stream solid separator)?

Refer to attached Amendment 0003 SOW (Attachment 1), Part 5, paragraph 2l: Provide full flow high efficiency liquid-solid separators, with automatic flush. Filtration shall remove solids size of 25 microns and larger.

Attachment 1 SOW part 5.2.g – Since there are no modifications to the chilled water pumps in the SOW, is it a requirement for the free cooling heat exchanger hot side pressure drop to remain the same as currently exists at the desired conditions of service? If not, please provide the maximum allowable pressure drop across the heat exchanger.

Please refer to the revised SOW (Attachment 1), Part 5, paragraph 2m: Design build contractor shall evaluate chilled water pumps and determine the maximum allowable pressure drop across the heat exchanger.

Are the submittals for the Enhanced Chiller Capacity project available?

Refer to attached CUP Control Modifications Amend 003 (Attachment 29) and chilled water enhancements - amend 003 (Attachment 27).

Is a Test and Balance report available to review?

refer to attached chilled water enhancements - amend 003 (Attachment 27)

Can NIST verify flow rates thru the chillers on the condenser side?

refer to attached chilled water enhancements - amend 003 (Attachment 27)

Are the dimensions of the existing sumps available?

NIST provided construction drawings in amendment 0002 referencing sump sizes.

If there are Code violations observed, is it the design-build team’s responsibility to correct?

If code violations were discovered, the contractor is only responsible for the violations within or associated with the scope of work.

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Paragraph L-4.1.2.2 of the RFP notes: Projects submitted shall be completed within the past five (5) years of the date of issuance of this RFP. For design-build projects, the design portion of the contract shall have been completed within the past five (5) years of the date of issuance of this RFP. If the design team’s representative project was not under a Design Build delivery (ie design-build-build or design-assist) can we submit a project if the design portion has been completed? i.e. the project is currently under construction.

As indicated in Section L-4.1.2.2 Projects submitted shall be completed within the past five (5) years of the date of issuance of this RFP. For design-build projects, the design portion of the contract shall have been completed within the past five (5) years of the date of issuance of this RFP.

Design Review - Shall CxA review DD and CD sets and attend design review meetings with DB team?

This amendment significantly revises Attachment 9, Chiller Plant Commissioning Requirements.

Refer to Attachment 9, Chiller Plant Commissioning, Amendment 0003.

Site Observations – Commissioning scope document part 2.2-G-6 notes CxA shall observe equipment startup. Please confirm if the commissioning scope shall include site visits prior to startup to observe equipment installations, piping, mechanical progress, etc.

This amendment significantly revises Attachment 9, Chiller Plant Commissioning Requirements.

Refer to Attachment 9, Chiller Plant Commissioning, Amendment 0003.

TAB verification – Shall CxA observe TAB contractors means and methods and verify a 10% sample of all TAB measurements?

This amendment significantly revises Attachment 9, Chiller Plant Commissioning Requirements.

Refer to Attachment 9, Chiller Plant Commissioning, Amendment 0003.

Trend Review – After functional testing is complete, should CxA lead an effort to analyze trend data to verify long term system operation.

This amendment significantly revises Attachment 9, Chiller Plant Commissioning Requirements.

Refer to Attachment 9, Chiller Plant Commissioning, Amendment 0003.

RFP Attachment #9 part 1.5 shows the entire existing chilled water system is in the commissioning scope. Please provide as-built temperature controls drawings of the chilled water identifying points and sequences of operation to be tested.

Contractor shall coordinate with JCI for current control sequences.

This amendment significantly revises Attachment 9, Chiller Plant Commissioning Requirements.

Refer to Attachment 9, Chiller Plant Commissioning, Amendment 0003.

Please verify that Cx scope for existing equipment is solely to identify existing issues for NIST. Please verify that existing issues will NOT be resolved or backchecked as a part of this contract, and thus excluded from the commissioning scope of work.

Commissioning of the existing chilled equipment and system is to identify deficiencies, the design build contractor is not responsible to correct deficiencies document in the existing chilled water system.

This amendment significantly revises Attachment 9, Chiller Plant Commissioning Requirements.

Refer to Attachment 9, Chiller Plant Commissioning, Amendment

The GC will assume the existing building structure is capable of supporting increased pipe sizing upgrades required per the Statement of Work (SOW). Please concur.

Design build contractor shall evaluate building components impacted by increase pipe sizes.

Have any modifications/upgrades been made to the existing condenser pump skid?

No modifications or upgrades been made to the existing condenser pump skid.

What are the filtration requirements for the renovated plant and the new free-cooling plant?

Refer to attached revised SOW (Attachment 1) Amendment 0003:

Part 5, paragraph 1q: Condenser water filtration system shall be side stream, with a minimum flow of 35% of the system flow.

Part 5, paragraph 2l: Provide full flow high efficiency liquid-solid separators, with automatic flush. Filtration shall remove solids size of 25 microns and larger.

Can large print drawings be included in our proposal to show the new Mechanical schematic in our proposal?

Yes, the design build contractor is allowed to provide schematic drawings in electronic format with their proposal.

All of the existing cooling towers are from the manufacturer EVAPCO. Is it the intent of this project to furnish and supply the new cooling tower/s from the same manufacturer EVAPCO?

Refer to the COOLING TOWER REQUIREMENTS (Attachment 11), section 2.1A. Contractors may propose an "or equal" tower manufacturer, cooling tower shall comply with specifications provided by the government.

Since this is an ESPC project what influence will JCI have on the overall design and equipment selection since they are the ESCO that is guaranteeing the performance and the ROI supposedly.

The ESCO contractor will review equipment submittals and control sequence changes prior to Government approval.

117 What are the Warranty requirements/durations?

Warranty Requirements are included in clause I.100, 52.246-21 WARRANTY OF CONSTRUCTION (MAR 1994). The full text of this clause can be accessed at:

https://www.acquisition.gov/far/52.246-21-0

PAGE 10 OF 20 1333ND21RNB1900020003

What will be required for the Owners training requirements/durations

Refer to revised Attachment 8 - DEMONSTRATION AND TRAINING, (Amend 0003)

Please clarify if modifying the existing Lightning Protection System will be required for this project, to now incorporate the new cooling towers into the existing system?

The existing cooling towers do not have a lightening protection system. If lightning protection is required by current code, the contractor shall comply with current code requirements.

Please clarify if the following electrical testing/studies for modifications to existing electrical gear will be required for this project: Coordination Study, Arc Flash Study, Harmonic Analysis Study, 3rd Party NETA Testing & IR scans (initial & follow up)

Refer to attached Attachment 1, Revised SOW Amendment 0003, Part 5, paragraph 10

Please clarify if harmonic filters will be required for new variable frequency drives?

Refer to attached: VARIABLE-FREQUENCY MOTOR CONTROLLER REQUIREMENTS– AMENDMENT 0003. (Attachment 31)

With this facility running 24/7/365, please clarify if there is possibly any nights or weekends that should be accounted for to perform shutdowns of electrical equipment such as motor control centers, switchgear, panels or if these can occur during typical hours during the day and scheduled with NIST accordingly?

Refer to attached revised Attachment 1, SOW (Amendment 0003), Part 3, paragraphs 6 and 7 for information regarding regularly scheduled site-wide outages.

Outages MAY be allowed outside of these times but this is dependent on operational requirements and constraints.

Approval for outages outside these timeframes is not guaranteed.

Commissioning - is there a certain duration that we should account for the commissioning process with NIST (1 week, 2 weeks, etc.)?

Time required to perform the commissioning scope shall be determined by the commissioning agent.

This amendment significantly revises Attachment 9, Chiller Plant Commissioning Requirements.

Refer to Attachment 9, Chiller Plant Commissioning, Amendment 0003.

Please clarify if any new maintenance lighting or receptacles will be required around the cooling towers?

The contractor shall verify existing conditions and comply with current code requirements and provide maintenance lighting or receptacles if required.

Can we get the most recent (4/2/2010) Motor Control Center Schedule for MCC C3 & C4?

The motor control submittal and construction drawings were provided in amendment 0002. Please refer to Phase 1 mechanical and electrical set dated 11/4/1994.

Can we see the sequence of operation for the condenser system and free cooling?

Contractor shall coordinate with JCI to acquire sequence of operations. CPO-10, the JCI central plant optimization program is a proprietary software program; because of the proprietary nature of the software there is no information NIST can provide.

Are there data logs we can view for the chilled and condenser water systems?

Requested information shall be provided after the Notice to Proceed (NTP).

Please identify which of the cooling towers are to be relocated for free cooling.

Two of the four cells to the south will be relocated, contractor shall coordinate with NIST which of the four.

129 Please provide a copy of the chiller data log.

Requested information shall be provided after the Notice to Proceed (NTP).

Please provide a copy of the sequence of operations for the cooling tower, chillers and associated pumps.

Contractor shall coordinate with JCI to acquire sequence of operations. CPO-10, the JCI central plant optimization program is a proprietary software program; because of the proprietary nature of the software there is no information NIST can provide.

Confirm whether or not the tower sumps have isolation valves.

For information only, refer to attached: COOLING TOWER STRUCTURE AMEND 0003. (Attachment 28). The contractor is responsible for verifying field conditions.

It was mentioned at the site visit that there might be times that the system can be shut down (holidays, weekends,…)?

Refer to attached revised Attachment 1, SOW (Amendment 0003), Part 3, paragraphs 6 and 7.

If the pump sizes are increased, will the crane system for the pumps be able to lift a larger pump? What is the capacity of the cranes for the pumps?

Crane lifting capacity is 2 Tons.

PAGE 11 OF 20 1333ND21RNB1900020003

NIST will likely need to upsize the piping (and possibly pumps) on the chilled water side as well to get the proper flow rate through the new chillers. While that’s outside the scope of this project, it should be confirmed that this is outside the SOW so that we don’t incorrectly assume this project was deficient when we don’t achieve 6,000 tons out of the new chillers due to those limitations. Please confirm this is correct and the chilled water side of the piping will not be modified.

Only the chilled water piping associated with the heat exchanger shall be in the scope of work.

What will the results of the balancer do for the project? If the flow conditions are not meeting the original design intent what would be the pathway forward? Having this study completed prior to the bid would help define exact needs of the project.

Per the SOW the design build team shall provide a prebalance report. Refer to the SOW PART 5, paragraph 5 Balancing:

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

In the event there is not enough space to upsize the pumps would the facility have concerns with adding a 5th pump?

Design build contractor shall evaluate the condenser water pumps and either add or modify to achieve the condenser water flows per the SOW.

Amendment 2 indicated we are not to contact the controls contractor (JCI). If we are not allowed to contact the controls contractor how would you propose that we coordinate the cost and design of the control modifications for this project?

Amendment 0002 only asks that you do not contact the U.S. Census Bureau contracting officer or the JCI ESCO point of contact for purposes of answering questions related to the requirements of this acquisition.

Amendment 0002 does not restrict you from contacting JCI controls representatives for the purpose coordinating project cost and design.

The proposed future condenser water range (75/84) will require a total condenser water flow in excess of 3 gpm/ton, approximately 20,000 gpm. This total flow will exceed the capacity of virtually all existing condenser water piping, pumps and accessories. Could the condenser water range be increased to result in a lower system flow, requiring less replacement of plant infrastructure? Is it preferable to replace all piping and pumps to achieve the required flow rate at the 75/84 range

It is preferred to replace all piping and pumps to achieve the required flow rate of the existing and future cooling towers.

Refer to SOW part 5, Scope of Work.

J.2 List of Attachments

PAGE 12 OF 20 1333ND21RNB1900020003

Attachment # Title # of Pages

(PDF)

Statement of Work (SOW) Renovation NIST Building 42 ‐ Cooling Tower Capacity Upgrade Project Design‐and Construction, Boulder, CO Site ‐ (Revised version dated 1/15/21, Amendment 0003)

2 General Instructions for Conducting Work at NIST Boulder 29

SPECIFICATIONS & DRAWINGS

3 PROJECT SUMMARY (Amend 0003) 4

4 PROJECT DESIGN AND CONSTRUCTION SUBMITTAL PROCEDURES 6

5 QUALITY REQUIREMENTS 2

6 OPERATION AND MAINTENANCE DATA 6

7 PROJECT RECORD DOCUMENTS 3

8 DEMONSTRATION AND TRAINING (Amend 0003) 3 9 CHILLER PLANT COMMISSIONING REQUIREMENTS (Amend 0003) 15 10 DIRECT DIGITAL CONTROL (DDC) SYSTEM FOR HVAC (Amend 0003) 8 11 COOLING TOWER REQUIREMENTS (Amend 0003) 7

12 IDENTIFICATION FOR ELECTRICAL SYSTEMS 6

13 PRELIMINARY COOLING TOWER LAYOUT 1

14 SITE UTILITY DISTRIBUTION SYSTEM NIST PHASE 2 30

15 CHILLED WATER SCHEMATIC 1

16 CONDENSER WATER SCHEMATIC 1

17 PHASE 2 CHILLER SUBMITTAL 59

18 SITE UTILITY DISTRIBUTION SYSTEM ENHANCED CHILLER CAPACITY 17

SITE UTILITY DISTRIBUTION SYSTEM ENHANCED CHILLER CAPACITY‐

ELECTRICAL

20 EXISTING COOLING TOWER SUPPORT EVALUATION 25

21 PHASE 2 COOLING TOWER SUBMITTAL 39

22 PHASE 2 PUMP PACKAGE WITH HX SUBMITTAL 269

23 PHASE 2 PUMP FACTORY TEST SUBMITTAL 14

24 NIST CUP PHASE 1 CONSTRUCTION DRAWINGS‐PDF ZIP FILE (Amend 0002) 1 25 NIST CUP PHASE 2 CONSTRUCTION DRAWINGS‐PDF ZIP FILE (Amend 0002) 1 26 NIST CUP PHASE 3 CONSTRUCTION DRAWINGS‐PDF ZIP FILE (Amend 0002) 1 27 Chilled Water Enhancements (Amend 0003) 69 28 Cooling Tower Foundation and Sump Layout (Amend 0003) 25 29 CUP Control Modifications (Amend 0003) 27 30 CUP Elec One‐Lines (Amend 0003) 3 31 Variable Frequency Drive Requirements (Amend 0003) 5

A Construction & Design Experience Project Data Sheet 2 B NIST AMD Boulder Past Performance Questionnaire (PPQ) 5 C Resume Form For Key Personnel 2 D Key Personnel Qualifications And Statement Of Understanding 1

Request for Proposal Attachments

J.3 Site Visit Attendee List 12/16/2020

PAGE 13 OF 20 1333ND21RNB1900020003

12/16/2020 Site Visit:

Del Torres & Erin Hubl - ORCOM

Guardian Construction – David Poma, Joshua VanOrden, Dan Fonoti, Robert Arbuckle

Tammy Moore – McCook Mechanical

Jesse Harris - HDI

Robert Kopp – Midlands Mechanical

Russ Martino

Mark Brown - MEP

Chris Horning – Mechanical, Electrical, Plumbing Design

Scott Bomgaars – Dean Electric

Andrew Jackson

Keith Bilbrey

Troy Smalley @ Case, Lowe and Hart

Eric Orstead – Trei Engineering

Joel Aragon (US Engineering)

Taylor Tinsley (US Engineering)

Brian Kannady (ME Engineering)

Andrew Rogers (M1 Mechanical)

John Baxter @ Herman Construction Group, Inc.

James Ball @ Herman

Kris Kremin - SMH Enterprises

Chad Weldon & Rick Alvarado @ AMI Mechanical

Brent Meisheid @ Centerre Construction

Jason K. Miller @ Sturgeon Electric

Bruce Neufeld @ Enhanced Mechanical Systems

Christopher Oliver @ Aleut

Lenny Morales

Douglas McDaniel & Walker Evans @ RK Mechanical

Keith Jones – Reliance Construction

Hunter Stoltz@ Hensel Phelps

PAGE 14 OF 20 1333ND21RNB1900020003

Emily Hamilton – Premier Environmental

Sean Dalton – DAWSON

Ron Tapia – DAWSON

Anthony Wilemon – Weifield Group

Heath Stein – KL&A

Steve Berry – RMH Group

Michelle Swanson – RMH Group

Marc Haines – MTech

Chris Bosacker – MTech

J.4 Wage Determination

PAGE 15 OF 20 1333ND21RNB1900020003

General Decision Number: CO20210017 01/15/2021

Superseded General Decision Number: CO20200017

State: Colorado

Construction Type: Building

County: Boulder County in Colorado.

BUILDING CONSTRUCTION PROJECTS (does not include single family homes or apartments up to and including 4 stories).

Note: Under Executive Order (EO) 13658, an hourly minimum wage of $10.95 for calendar year 2021 applies to all contracts subject to the Davis-Bacon Act for which the contract is awarded (and any solicitation was issued) on or after January 1, 2015. If this contract is covered by the EO, the contractor must pay all workers in any classification listed on this wage determination at least $10.95 per hour (or the applicable wage rate listed on this wage determination, if it is higher) for all hours spent performing on the contract in calendar year 2021. If this contract is covered by the EO and a classification considered necessary for performance of work on the contract does not appear on this wage determination, the contractor must pay workers in that classification at least the wage rate determined through the conformance process set forth in 29 CFR 5.5(a)(1)(ii) (or the EO minimum wage rate, if it is higher than the conformed wage rate). The EO minimum wage rate will be adjusted annually. Please note that this EO applies to the above-mentioned types of contracts entered into by the federal government that are subject to the Davis-Bacon Act itself, but it does not apply to contracts subject only to the Davis-Bacon Related Acts, including those set forth at 29 CFR 5.1(a)(2)-(60). Additional information on contractor requirements and worker protections under the EO is available at www.dol.gov/whd/govcontracts.

Modification Number Publication Date 0 01/01/2021 1 01/15/2021

ASBE0028-002 07/01/2019

Rates Fringes

ASBESTOS WORKER/HEAT & FROST INSULATOR - MECHANICAL (Duct, Pipe & Mechanical System Insulation)

.................................$ 32.98 14.73

CARP1607-001 06/01/2020

Rates Fringes

MILLWRIGHT.......................$ 35.50 14.68

ELEC0068-018 06/01/2020

Rates Fringes

ELECTRICIAN......................$ 38.00 16.97

* ELEV0025-001 01/01/2021

Rates Fringes

ELEVATOR MECHANIC................$ 48.09 35.825

FOOTNOTE:

a.Vacation: 6%/under 5 years based on regular hourly rate for all hours worked. 8%/over 5 years based on regular hourly rate for all hours worked.

b. PAID HOLIDAYS: New Year's Day; Memorial Day; Independence Day; Labor Day; Veterans' Day;

Thanksgiving Day; the Friday after Thanksgiving Day; and Christmas Day.

PAGE 16 OF 20 1333ND21RNB1900020003

ENGI0009-017 05/01/2018

Rates Fringes

POWER EQUIPMENT OPERATOR

(Crane) 141 tons and over...........$ 31.07 10.70 50 tons and under...........$ 28.40 10.70 51 to 90 tons...............$ 28.57 10.70 91 to 140 tons..............$ 29.55 10.70

IRON0024-009 11/01/2020

Rates Fringes

IRONWORKER, ORNAMENTAL...........$ 32.00 12.01

IRON0024-010 11/01/2020

Rates Fringes

IRONWORKER, STRUCTURAL...........$ 32.00 12.01

PAIN0079-006 08/01/2017

Rates Fringes

PAINTER (Brush, Roller and Spray; Excludes Drywall Finishing/Taping)................$ 20.50 8.41

PAIN0419-001 07/01/2016

Rates Fringes

SOFT FLOOR LAYER (Vinyl and Carpet)..........................$ 20.00 10.83

PLUM0003-009 06/01/2020

Rates Fringes

PLUMBER (Excludes HVAC Duct, Pipe and Unit Installation)......$ 38.38 16.67

PLUM0208-010 06/01/2018

Rates Fringes

PIPEFITTER (Includes HVAC Pipe Installation; Excludes HVAC Duct and Unit Installation)....................$ 37.55 14.95

* SFCO0669-002 01/01/2021

Rates Fringes

SPRINKLER FITTER (Fire Sprinklers)......................$ 38.23 25.30

SHEE0009-004 07/01/2019

Rates Fringes

PAGE 17 OF 20 1333ND21RNB1900020003

SHEET METAL WORKER (Includes HVAC Duct Installation; Excludes HVAC Pipe and Unit Installation)

................................$ 34.62 17.95

SUCO2013-003 07/31/2015

Rates Fringes

BRICKLAYER.......................$ 21.96 0.00

CARPENTER, Excludes Drywall Hanging

.................................$ 22.66 6.79

CEMENT MASON/CONCRETE FINISHER...$ 20.31 6.76

DRYWALL FINISHER/TAPER...........$ 20.82 6.37

DRYWALL HANGER...................$ 19.24 6.30

HVAC MECHANIC: HVAC Unit Installation, Excludes Pipe and Duct Installation

.................................$ 25.23 9.36

LABORER: Common or General......$ 11.76 0.00

LABORER: Mason Tender - Brick...$ 15.99 0.00

LABORER: Mason Tender - Cement/Concrete..................$ 16.00 0.00

LABORER: Pipelayer..............$ 16.96 3.68

OPERATOR:

Backhoe/Excavator/Trackhoe.......$ 20.78 5.78

OPERATOR: Bobcat/Skid Steer/Skid Loader................$ 18.58 2.42

OPERATOR: Grader/Blade..........$ 21.50 0.00

ROOFER...........................$ 17.14 0.00

TRUCK DRIVER: Dump Truck........$ 17.34 0.00

WELDERS - Receive rate prescribed for craft performing operation to which welding is incidental.

Note: Executive Order (EO) 13706, Establishing Paid Sick Leave for Federal Contractors applies to all contracts subject to the Davis-Bacon Act for which the contract is awarded (and any solicitation was issued) on or after January 1, 2017. If this contract is covered by the EO, the contractor must provide employees with 1 hour of paid sick leave for every 30 hours they work, up to 56 hours of paid sick leave each year. Employees must be permitted to use paid sick leave for their own illness, injury or other health-related needs, including preventive care;

to assist a family member (or person who is like family to the employee) who is ill, injured, or has other health-related needs, including preventive care; or for reasons resulting from, or to assist a family member (or person who is like family to the employee) who is a victim of, domestic violence, sexual assault, or stalking. Additional information on contractor requirements and worker protections under the EO is available at www.dol.gov/whd/govcontracts.

Unlisted classifications needed for work not included within the scope of the classifications listed may be added after award only as provided in the labor standards contract clauses (29CFR

5.5 (a) (1) (ii)).

PAGE 18 OF 20 1333ND21RNB1900020003

The body of each wage determination lists the classification and wage rates that have been found to be prevailing for the cited type(s) of construction in the area covered by the wage determination. The classifications are listed in alphabetical order of "identifiers" that indicate whether the particular rate is a union rate (current union negotiated rate for local), a survey rate (weighted average rate) or a union average rate (weighted union average rate).

Union Rate Identifiers

A four letter classification abbreviation identifier enclosed in dotted lines beginning with characters other than "SU" or "UAVG" denotes that the union classification and rate were prevailing for that classification in the survey. Example: PLUM0198-005 07/01/2014. PLUM is an abbreviation identifier of the union which prevailed in the survey for this classification, which in this example would be Plumbers. 0198 indicates the local union number or district council number where applicable, i.e., Plumbers Local 0198. The next number, 005 in the example, is an internal number used in processing the wage determination. 07/01/2014 is the effective date of the most current negotiated rate, which in this example is July 1, 2014.

Union prevailing wage rates are updated to reflect all rate changes in the collective bargaining agreement (CBA) governing this classification and rate.

Survey Rate Identifiers

Classifications listed under the "SU" identifier indicate that no one rate prevailed for this classification in the survey and the published rate is derived by computing a weighted average rate based on all the rates reported in the survey for that classification. As this weighted average rate includes all rates reported in the survey, it may include both union and non-union rates. Example: SULA2012-007 5/13/2014. SU indicates the rates are survey rates based on a weighted average calculation of rates and are not majority rates. LA indicates the State of Louisiana. 2012 is the year of survey on which these classifications and rates are based. The next number, 007 in the example, is an internal number used in producing the wage determination. 5/13/2014 indicates the survey completion date for the classifications and rates under that identifier.

Survey wage rates are not updated and remain in effect until a new survey is conducted.

Union Average Rate Identifiers

Classification(s) listed under the UAVG identifier indicate that no single majority rate prevailed for those classifications; however, 100% of the data reported for the classifications was union data. EXAMPLE: UAVG-OH-0010 08/29/2014. UAVG indicates that the rate is a weighted union average rate. OH indicates the state. The next number, 0010 in the example, is an internal number used in producing the wage determination. 08/29/2014 indicates the survey completion date for the classifications and rates under that identifier.

A UAVG rate will be updated once a year, usually in January of each year, to reflect a weighted average of the current negotiated/CBA rate of the union locals from which the rate is based.

WAGE DETERMINATION APPEALS PROCESS

1.) Has there been an initial decision in the matter? This can be:

* an existing published wage determination

* a survey underlying a wage determination

* a Wage and Hour Division letter setting forth a position on a wage determination matter

* a conformance (additional classification and rate) ruling

On survey related matters, initial contact, including requests for summaries of surveys, should be with…