Attachment (13) N6449823R4027 Amendment 0002 Q_A as of 16 February.pdf

N6449823R4027 Amendment 0002 Q&A as of 16 February

See below for questions and answers. Changes from previous amendment in red.

1. How may Gravimetric Analysis (NADCA Vacuum Tests) should we price in out proposals?

ANSWER: Perform Gravimetric Analysis (NADCA Vacuum Test) is not a requirement found in the SOW. The SOW calls for a visual inspection meeting the requirement of NADCA ACR.

“5.2.1 Method 1 Inconclusive: If Method 1 - Visual Inspection is inconclusive or disputed, then it is recommended that Method 2 for Porous Surfaces - Surface Comparison Test or Method 2 for Non-Porous Surfaces - NADCA Vacuum Test, be used to verify cleanliness.”

2. Does the NADCA vacuum testing have to be performed by a 3rd party.

ANSWER: Gravimetric Analysis (NADCA Vacuum Test), if recommended and subsequently ordered, is not required to be performed by a 3rd party.

3. Will the facility be providing the new filters for the AHU’s being cleaned or will the awarded contractor be responsible for providing them?

ANSWER: The Navy will perform filter changes.

4. Is there an area inside or outside of the building we can run a gas compressor?

ANSWER: Yes.

a. If outside, can we run air lines into the building?

ANSWER: Yes, at the discretion of NSWCPD and only if there is any existing penetration or the contractor chooses to penetrate the building, the penetration is approved by NSWCPD, and the contractor creates and repairs the penetration at no cost to the Government. Be aware that there may be Security and Environmental requirements to consider, which may restrict or forbid the use of the compressor. The contractor will coordinate with NSWCPD TPOC.

5. Will there be an escort assigned during the duct cleaning process?

ANSWER: NSWCPD has no expectation to “escort” the contractor, which implies continuous surveillance. NSWCPD will only maintain a regular presence when stipulated by the SOW, e.g., during photography or if the contractor has not been granted access, etc. Once the contractor has been granted access, they will be autonomous barring any exceptions in the SOW, e.g., photography, or explicitly restricted areas. Be aware that apart from those circumstances where NSWCPD presence is mandatory as required by the SOW, liquidated damages may apply. The contractor will coordinate with NSWCPD TPOC.

a. If we do have an escort, will they have daily break and lunch requirements?

ANSWER: Yes. As stipulated by the SOW, the contractor is responsible for working out support from NSWCPD and the contractor owns the schedule. The contractor will coordinate with NSWCPD TPOC.

6. Will the facility assist in locating power sources for duct cleaning equipment?

ANSWER: Yes, as stipulated in the SOW. The contractor will coordinate with NSWCPD TPOC.

7. Will there be a safe place to store our equipment on site?

ANSWER: Yes, as stipulated in the SOW. The contractor will coordinate with NSWCPD TPOC.

8. Scope says that, After successful cleaning of the HVAC system components, seal ductwork with a white-colored, flexible, durable, and moisture resistant penetrating coating to improve airflow and discourage both mold and the build-up of particulate matter in the HVAC system specified in SOW paragraph 1.36. Attachment 2 stipulates further work requirements. Please confirm that this coating is only to be applied to internal insulation cleaned and not bare sheet metal

ANSWER: The SOW does not require coating of the ducts. See amendment 002.

9. Please confirm that contractor is not required to seal air leakages or repair ductwork/equipment.

ANSWER: As stipulated in the SOW, the contractor is expected to seal air leaks.

10. Please confirm that no testing is required to be performed.

ANSWER: As stipulated in the SOW, a visual inspection is required, meeting the requirement of NADCA ACR. No testing is required.

11. Please confirm that there are no asbestos containing materials that can be disturbed in the cleaning project (e.g. insulation on the outside of the ductwork)

ANSWER: The Government is not aware of any asbestos that would be encountered during this work.

12. Please confirm that exhaust is excluded.

ANSWER: Bathroom exhaust fans are included in the SOW; building exhaust fans are excluded.

Furthermore, as stipulated in the SOW, “the contractor shall clean the Air Handling Units (AHUs), supply and return ductwork, outside air intakes, air distribution devices, blowers and fans, terminal units, coils, return and supply diffusers, and other components of SOW paragraph 1.35 and Attachment 1 to a visibly clean condition; this includes cleaning of all system component exterior and “the Contractor shall clean all AHU HVAC system components shown in TABLE I and Attachment 1 and components of the system as specified in Attachment 2 that includes but is not limited to fibrous glass insulated (exterior) ductwork, air distribution devices, variable-air-volume (VAV) boxes, coils, fans, louvers, outside air intakes, return diffusers/grilles, and supply diffusers/grilles.”

13. Please confirm that hard surfaces (e.g. ceilings or walls) are not required to be cut into in order to facilitate cleaning.

ANSWER: There is no expectation to have to cut into hard, rigid barriers or structures.

14. Please confirm that any ceiling tiles damaged can be replaced by Navy.

ANSWER: As stipulated in the SOW concerning ceiling tiles, “the Contractor shall clean all . . .

ceiling tiles directly adjacent to air distribution devices, . . . Where ceiling tiles are missing, the Government will provide replacements for the Contractor to install following cleaning and sealing work . . . .”

15. Please confirm that digital photographs rather than video is acceptable to document the success of the cleaning project.

ANSWER: As stipulated in the SOW, photography and videography is restricted to NSWCPD.

NSWCPD will release applicable images and recordings to the contractor for reporting purposes.

16. HVAC cleaning is typically completed using gasoline powered air compressors operating at

~175psi to agitate debris within ductwork and push the debris into HEPA filtrated vacuum collection devices. The air compressor is typically staged outside the building/area being cleaned so exhaust from the compressor is released into the environment and not into an enclosed space, and pneumatic air lines are run into the building/area being cleaned to complete agitation of debris within ductwork. Will air compressors be allowed to be staged outside bldg. 77H on this project with pneumatic air lines running through exterior doors? Or will other means of compressed air be needed to agitate debris within ductwork?

ANSWER: See above question #4.

17. Can you confirm if the ductwork serving the E200 office area located adjacent to the mezzanine area housing AHUs 1, 2, & 3 and above the volumetric flow lab is in or out of the scope of this project? Pages 8 & 9 of Attachment 2 seem to indicate this area is in the scope, but I thought Tony mentioned that area was out of scope when we were on site yesterday?

ANSWER: A stipulated in Table I of the SOW, the following require cleaning: AHU-1 and Trane Unit (CRAC) incidental to the Volumetric Control Lab; AHU-2 incidental to the 1ST Floor Men’s Room, AHU-3 incidental to the mezzanine, and AHU-4 incidental to the 1ST Floor Men’s Room.

18. Does the government anticipate requesting NADCA Vacuum Testing for ductwork and AHUs that passes a visual inspection? Details are in Sections3.3.1.2 & 3.3.1.3 on pages 9-10 of the SOW (Attachment 2).

ANSWER: This will be determined if and when circumstances dictate in negotiation with NSWCPD. Currently, the SOW only stipulates visual inspection, or Method 1, of NADCA ACR. See above questions.

19. Page 5 of the Solicitation details “sealing” of ductwork, can you confirm this means all bare metal ductwork should be sealed with Hardcast RS-100 (or a comparable product) to prevent leakage?

ANSWER: There is no expectation to spray, roll or brush a tightly-adhered/anchored “coat”, i.e., apply surface treatments (aka, resurfacing materials or repair coatings like high-solids paint) to the interior of the ductwork that show signs of damage or degradation. HARDCAST RE-500 is a spray-applied insulation, encapsulant, (i.e., resurfacing or repair coating), and contains EPA registered luteinizing biocides (presumably also registered in for use in PA and applied licensed applicator). See updated Sow in amendment 0002 section 1.35.5 for further guidance on what is expected under “sealing”.

20. SOW Attachment 2, Page 9, Section 3.2.2.6 details antimicrobial coatings. These are typically applied to internally lined ductwork, is it the government’s intent to coat all internally lined ductwork with Hardcast RE-500 (or a comparable product)?

ANSWER: Whereas Attachment 2 covers both agents and coatings, there is no expectation to spray, roll or brush a tightly-adhered/anchored “coat”, i.e., apply surface treatments (aka, resurfacing or repair coatings like high-solids paint) to the interior of the ductwork. HARDCAST RE-500 is in order a spray-applied insulation, encapsulant, (i.e., resurfacing or repair coating), and contains EPA registered luteinizing biocides* (presumably also registered in for use in PA and applied licensed applicator).

21. Does the government anticipate requesting NADCA Vacuum Testing for ductwork and AHUs that passes a visual inspection? Details are in Sections3.3.1.2 & 3.3.1.3 on pages 9-10 of the SOW (Attachment 2).

ANSWER: This will be determined if and when circumstances dictate in negotiation with NSWCPD. Currently, the SOW only stipulates visual inspection, or Method 1, of NADCA ACR. See above questions.

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