7219262 AMENDMENT 0002.pdf

NAVFAC

SPECIFICATION

7219262 Replace HVAC Free Issue MAG 14, Building 149

MCAS Cherry Point, NC AMENDMENT

#0002

IMPORTANT

This amendment should be acknowledged when your proposal is submitted. Failure to acknowledge the amendment may constitute grounds for rejection of the proposal.

If your proposal has been submitted prior to the receipt of this amendment, acknowledgement should be made by telegram, which should state whether the price contained in your proposal is to remain unchanged, is to be decreased by an amount, or is to be increased by an amount. The acknowledgement must be received prior to proposal opening time.

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

1 2

2. AMENDMENT/MODIFICATION NO. 3. EFFECTIVE DATE 4. REQUISITION/PURCHASE REQ. NO. 5. PROJECT NO. (If applicable)

0002 08/13/2025 7219262

6. ISSUED BY Code N40085 7. ADMINISTERED BY (If other than item 6.) Code

CG MCAS Cherry Point

FACILITIES, ROICC

B-163, CURTIS ROAD

PSC BOX 8006

CHERRY POINT, NC 28533

8. NAME AND ADDRESS OF CONTRACTOR (No., street, county, State and ZIP Code) 9A. AMENDMENT OF SOLICITATION

Replace HVAC Hazmat Free Issue MAG 14, Building 149

9B. DATED (SEE ITEM 11)

AMENDMENT MUST BE ACKNOWLEDGED WITH YOUR PROPOSAL 10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 13)

CODE FACILITY CODE

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. 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 1 copy of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted; or (c) By separate letter or telegram 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 telegram or letter, provided each telegram or letter makes reference to the solicitation and this amendment, and is received prior to the opening hour and date specified.

12. ACCOUNTING AND APPROPRIATION DATA (if required)

13. THIS ITEM APPLIES ONLY TO MODIFICATIONS OF CONTRACTS/ORDERS,

IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

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

CONTRACT ORDER NO. IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATION CHANGES (such as changes in paying office, appropriation date, 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)

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

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

7219262 Replace HVAC Hazmat Free Issue MAG 14, Buidling 149, Marine Corps Air Station Cherry Point, NC

Amendment 0002 is being issued to respond to pre-award RFI's.

The deadline to submit pre-award RFI’s REMAINS 18 August 2025 at 9:00 AM.

The proposal due date of 26 August 2025 at 12:00 PM local time REMAINS unchanged.

See Attached.

15A. NAME AND TITLE OF SIGNER (Type or print) 16A. NAME AND TITLE OF CONTRACTING OFFICER (Type or print)

15B. CONTRACTOR/OFFEROR (Same as Item 8) 15C. DATE SIGNED 16B. UNITED STATES OF AMERICA

BY

(Signature of person authorized to sign) (Signature of Contracting Officer)

NSN 7540-01-152-8070 30-105 STANDARD FORM 30 (REV.1-83) 0224-3(10-90)

PREVIOUS EDITION UNUSABLE Prescribed by GSA

16C. DATE SIGNED

josef.vallone Cross-Out josef.vallone Inserted Text

Subj: AMENDMENT TO WO 7219262, REPLACE HVAC, HAZMAT/FREE ISSUE, MAG-14, BLDG. 149, MCAS CHERRY POINT NC

CONTINUATION SHEET

PROJECT TABLE OF CONTENTS

SECTION 23 05 93, TESTING, ADJUSTING, AND BALANCING FOR HVAC is deleted completely.

Amendment 0002 7219262 Replace HVAC Hazmat Free Issue MAG 14, Building 149

RFI Responses:

1. SF-1 through SF-6 are currently scheduled as axial propeller fans. These fans are installed inline located downstream of filter banks. As the filters accumulate debris and begin to load, the system static pressure will increase. Axial propeller fans experience a significant drop in airflow when additional static pressure is added to the system, especially when compared to centrifugal fans. Since these fans are operating at constant speed, any increase in static pressure due to filter loading will result in reduced airflow and could lead to imbalances across the system.

Should inline centrifugal fans be used for the supply fans instead, so that their fan curves more closely match those of the roof-mounted centrifugal utility set fans and better maintain balanced airflow as system pressure changes?

Response: Bid as specified, The DOR takes no exception for the use of inline centrifugal fans in lieu of the basis of design, however, this change is not necessary. The rooms served do not require precise airflows nor do they require a specific level of pressurization.

2. How will balancing be achieved on SF-1 through SF-6. With direct drive fans, there is no way to balance the fans without the use of VFDs. The use of VFDs would be difficult if they need to meet Class 1 Div 2. Can these fans be provided as belt drive so the RPM can be set per scheduled performance?

Response: The rooms served do not require precise airflows nor specific balancing. Fans are sized to provide basic minimum airflow through each room.

3. Is there a specific AMCA spark rating we are required to meet on all of the fans?

Response: A minimum of Type B.