Amend 0011.pdf

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT

1. CONTRACT ID CODE

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

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 SOLICIATION NO.

9B. DATED (SEE ITEM 11)

10A. MODIFICATION OF CONTRACT/ORDER NO.

10B. DATED (SEE ITEM 11)

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 copies 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 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.

12. ACCOUNTING AND APPROPIRATION DATA (If required)

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)

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

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

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AMENDMENT NO. 0011 08/10/26 26-0709

N40085

NAVFAC Mid-Atlantic Resident Officer in Charge of Construction 1107A Birch Street Camp Lejeune, NC 28547-2521

See Item 6

✘ N40085-26-R-9042

06/09/26

26-0709, Buildings 15, 326, DD48, G770, NH180, NH200 Clean HVAC Systems Amendment 0011, Respond to RFI's & Extend due date and time for proposals.

The time and due date for proposals is changed to August 14, 2026 by 1:00 pm est.

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

N40085-26-R-9042 Amendment 0011

CONTINUATION SHEET

1. QUESTION: The new scope of work calls for an rust inhibitor to be applied to the units. Is there a certain type of inhibitor required or a specification for the inhibitor that can be provided?

ANSWER: For HVAC systems, choose a rust converter that’s compatible with your materials (metal, plastic, PCBs) and designed for in-service protection. Always clean the surface first, apply evenly, and seal to prevent future rust. Products used with success are Star rust converter, AC Pro- Tech Aerosol, VHT SP229, and Corroseal.

2. QUESTION: Do you know if Sodium Sulfite, Sodium Lauroyl Sarcosinate, and Dipotassium Phosphate (used strictly as a pH buffer) is the only option for inhibitor? We do not make this product. We use a sodium nitrite or molybdate product. We do have sodium sulfite but not with Lauroyl Sarcosinate.

ANSWER: For active HVAC systems, the most common and effective rust/corrosion inhibitors are nitrite-based, molybdate, OAT organic, and mixed inhibitor formulations, chosen based on system chemistry, materials, and environmental exposure. Proper selection and maintenance ensure extended equipment life, reduced energy loss, and lower repair costs.

Selection Considerations:

Material Compatibility: Match inhibitor to the metals in the system (steel, copper, aluminum) Environmental Conditions: Humidity, temperature, and exposure to salt or chlorides affect choice Regulatory Compliance: Avoid restricted chemicals (e.g., chromates) unless permitted Cost-Effectiveness: Balance protection level with maintenance and replacement costs

3. QUESTION: If there are no drawings for each building is it possible to get the square footage of each building that will require duct cleaning? I really am interested in providing you a price to clean the duct work. Can you assist on this?

ANSWER: The only ductwork requiring cleaning in this SOW is the outside air ductwork associated with each AHU, including outside air dampers, mixing boxes, and access doors within the outside air duct. In the supply duct the only cleaning is required within the sound attenuator’s and approximately 5 feet on either side of the sound attenuator. Recommend either the site or contractors verify exact linear feet of supply, outside air duct requiring cleaning, and the number of sound attenuators associated to AHU’s being cleaned for each building.

4. QUESTION: I’m in receipt of Amendment 10 and noticed that the drain pans for building 15 were not addressed in the new scope of work. It says that “removal of the coils in building 15 for drain pan replacement carries inherent risk due to potential pre-existing corrosion”. According to Trane, there isn’t a replacement part for the pans. See below. Can a rust inhibitor be apply as called for in the revised building 326 new scope of work?

ANSWER: See revised scope of work dated 10 August 2026.

4. All other terms and conditions remain unchanged.