A21001.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 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 your 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.

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

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

STANDARD FORM 30 (REV. 10-83)

Prescribed by GSA FAR (48 CFR) 53.243

FACILITY CODE

9A. AMENDMENT OF SOLICITATION

NO.

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NO.

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 ONLY APPLIES TO MODIFICATION OF CONTRACTS/ORDERS.

IT MODIFIES THE CONTRACT/ORDER NO. 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 NO.

IN ITEM 10A.

B. THE ABOVE NUMBERED CONTRACT/ORDER IS MODIFIED TO REFLECT THE ADMINISTRATIVE 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)

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 (No., 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)

NSN 7540-01-152-8070

Previous edition unusable

A21001

000SB

See Schedule Modification Amount:

The purpose of this amendment is to provide answers to questions received and to extend the due date/time of the proposals to 12:00 p.m. EST on 4/21/2021.

NATIONAL INST OF STDS AND TECHNOLOGY

100 BUREAU DRIVE STOP 1640

BUILDING 301 ROOM B125

GAITHERSBURG MD 20899-1640

See Block 6

NB193000-21-00288

NB193000-21-00288

1 4

04/14/2021

04/01/2021

Q & A’s

Q1: Is there a way that my rep can do a video call meeting or facetime with the onsite rep for a more detailed walkthrough video showing access, lay down area, and, existing install as well as tie‐in points with ductwork and electrical. We need a better perspective of the work area to get a more accurate quote.

A1: No, not at this point of procurement. Offerors had from April 1 until April 5, 2021 to request for a site‐visit, but none were received.

Q2: Will this be a direct change out or an upgrade?

A2: The existing system will be removed and replaced / upgraded for efficiency, ease of maintenance. The new unit will likely have a much smaller footprint due to technology efficiencies introduced sine the 1980’s. The new dust collector will be configured differently as we are removing the return air duct back to the building and exhausting to the outside.

Q3: Does this require a new foundation or will we be using the existing one?

A3: SOW requires removal of concrete old pads / mounts and installation of new mounting pads in order to install the system. Please reference the photos and installation drawings showing old concrete mounts.

Q4: Will this require any electrical work?

A4: Yes, see SOW.

Q5: When the bid is turned in, will we need to provide engineered drawings of the new system?

A5: Not with the proposal being submitted. However winning offeror will need t provide a complete design for approval before installation commences – per SOW. As‐built will be required at project completion.

Q6: Is there a way to get more pictures?

A6: No, due to COVID‐19 work schedule arrangements within the team, I am unable to access the site prior to bid due date.

Q7: I have a question on information listed on the Basis of Design. The Air Flow is listed at 11,000 cfm which aligns with the 20” Inlet Size. Below in the Or Equal Section, it is stated that with the three pieces of equipment running an aggregate flow of 1700 cfm. These two do not seem to agree with each other, it appears the existing Dust Collector may be tremendously oversized which may have led to the shortened life. Can you please get me clarification on those figures?

A7: The sizing of the design criteria was based on a previous installation plan that returned air into the building. NIST has determined that return air had significant disadvantages and more annual costs and maintenance to maintain the various safety elements of that design. Some of the design elements from that proposed installation were adopted in this requirement.

NIST is relying on industry experts to develop this design. While some calculations can be made, exacting calculations and efficient design considerations are the purview of those that deal with these installations.

Q8: Flow requirement for the drum sander, planner, and table saw?

A8: The flow requirement for these machines was provided by an engineer in our safety department. This is where the 1700 cfm figure came from. One of the several engineering inputs in developing this SOW.

Q9: What size is the drop to each?

A9: There are 6” lines going to under floor duct from the table saw, drum sander and planner.

There are 3 other pieces of equipment connected to the underfloor duct with 3” duct.

Q10: Total number of drops?

A10: 6

Q11: Is consideration given for possible expansion?

A11: At this time, no additional equipment is expected to be added to the system. Design should be calculated for existing equipment.

Q12: If determined it is oversized, will an alternative be considered?

A12: Yes, however, the same cartridge based dust collector is still desired for ease of maintenance.

Q13: What is the System External Static Pressure requirement for proper fan sizing?

A13: It is a design consideration for the successful offeror.

Q14: Is a waste drum(s) required or is waste going into the current waste‐management container?

A14: The current system utilizes a waste management container. Given the limited use of the system, NIST desires to remove cost where they can. Ideally, a waste container that could be dumped by shop personnel is desired, but a waste management container is an option if required by code or other consideration.

Q15: Is there a minimum height requirement for bottom of hopper in order to fit a waste management container under hopper?

A15: Height consideration is a design consideration. The distance from the asphalt to the dust collector discharge will determine size, type, and height of any container.

Q16: If waste management container, is there a requirement for a Cast Iron RAV to meet NFPA requirements for combustible dust?

A16: This is a design and code compliance question for the design team.