Amend 2 - QandA 30AUG21.pdf

(x)

12305B21R0022 x x

1 copies of the amendment; (b) By acknowledging receipt of this amendment on each copy of the offer submitted ; or (c) By separate letter or electronic communication which includes a reference to the solicitation and amendment numbers. FAILURE OF YOUR ACKNOWLEDGEMENT 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.

x

ARS-12305B

BELTSVILLE MD 20705

BLDG 003, RM 223, BARC-WEST

10300 BALTIMORE AVENUE

USDA ARS NEA AAO ACQ/PER PROP

06/09/20210002

13. THIS ITEM ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS. IT MODIFIES THE CONTRACT/ORDER NO. AS DESCRIBED IN ITEM 14.

12. ACCOUNTING AND APPROPRIATION DATA (If required) is not extended.is extended, Items 8 and 15, and returning

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

The above numbered solicitation is amended as set forth in Item 14. The hour and date specified for receipt of Offers

11. THIS ITEM ONLY APPLIES TO AMENDMENTS OF SOLICITATIONS

FACILITY CODE CODE

10B. DATED (SEE ITEM 13)

10A. MODIFICATION OF CONTRACT/ORDER NO.

9B. DATED (SEE ITEM 11)

9A. AMENDMENT OF SOLICITATION NO.

CODE

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

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

PAGE OF PAGES

4. REQUISITION/PURCHASE REQ. NO.3. EFFECTIVE DATE2. AMENDMENT/MODIFICATION NO. 5. PROJECT NO. (If applicable)

1. CONTRACT ID CODE

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

06/09/2021

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

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE CHANGES (such as changes in paying office, C. THIS SUPPLEMENTAL AGREEMENT IS ENTERED INTO PURSUANT TO AUTHORITY OF:

D. OTHER (Specify type of modification and authority) appropriation data, etc.) SET FORTH IN ITEM 14, PURSUANT TO THE AUTHORITY OF FAR 43.103(b).

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

ORDER NO. IN ITEM 10A.

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

EAHU 1&2 Fan Retrofit and Multi-Stack Chiller Rplc, HNRC, Boston, MA

1. Purpose: amend solicitation to include Questions and Answers, 3 items, dtd 30AUG21.

Attached 1 pg.

END

Period of Performance: 09/20/2021 to 08/31/2022

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

15C. DATE SIGNED 16B. UNITED STATES OF AMERICA 15B. CONTRACTOR/OFFEROR 16C. DATE SIGNED

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

JASON ROBBINS

STANDARD FORM 30 (REV. 11/2016)

Prescribed by GSA FAR (48 CFR) 53.243

Previous edition unusable

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

USDA-ARS - U.S. National Arboretum Solicitation# 12305B21R0037 Pre-Bid RFI's

Stormwater Structure Repairs

Solicitation 12305B21R0022 Questions & Answers August 30, 2021 EAHU 1 & 2 Fan Retrofit and Multi-Stack Chiller Replacement HNRC, Boston, MA

# Reference RFI Response 1 Drawing MD 202 & M

202 The demo plan MD 202 calls to remove two existing 30” x 66” access doors. The new work plan M 202 calls for two new 30” x 66” access doors. Can the existing removed access door be reused in the new location? The existing doors are a perfect fit for the existing unit construction.

This is acceptable as long as the existing access doors are not damaged during demolition.

2 Drawing MD 201 & M

The demo plan MD 201 calls for removal of the existing air flow measuring stations – AFMS. The new work plan M 201 calls for new ductwork to be installed where the AFMS was removed. During today’s site visit the location of the AFMS’s were observed. The EAHU – 1 AFMS is not located as shown on the plan. It is directly on top of the EAHU – 1. It is surrounded on 3 sides by existing large ductwork and piping.

The fourth side allows room for a workman to crawl to gain access to the AFMS but not enough room to get replacement 42” round ductwork into place.

The EAHU – 2 AFMS is in a shaft. Access into that shaft is through a 24” x 24” access panel. Again, not enough room to get the replacement 42” round duct into place.

Would it be acceptable to remove the inner guts of the AFMS leaving the existing exterior casing of the AFMS in place?

This would accomplish the desired result at a significant cost savings. It would also limit the amount of time each EAHU would be completely off line.

This is acceptable. Any damage to the exterior casing shall be repaired to a Seal Class A rating to ensure minimal leakage.

3 Specification 23 23 00 Page 6 Para 2.4.8

Would Zoom Lock mechanical fittings be an acceptable alternate for refrigeration fittings 1.375” and smaller in lieu of brazed or flared fittings?

Zoom lock fitting shall not be used. All refrigerant piping shall be brazed per design documents.