Attachment 6-QNA_Dorm Duct Cleaning.docx

Maxwell Dorm Duct Cleaning Q&A

1. Wage determination. Attachment 3 appears to be a Davis-Bacon Act wage determination, while the solicitation assigns services NAICS 561790 and incorporates the Service Contract Labor Standards clauses at FAR 52.222-41, 52.222-42, and 52.222-44. Please confirm which labor standard governs this requirement, provide the applicable wage determination the Government intends to apply, and confirm whether separate determinations apply to the Phase 1 cleaning (service) work and the Phase 2 installation work. A. SAM.gov has been updated with the Service wage determination

2. Mold treatment scope. SOW paragraph 1.1 makes the Contractor responsible for treating active mold if identified, but sets no quantity, location, or not-to-exceed limit. Will the Government establish a separate CLIN or unit price for mold treatment, or define a not-to-exceed quantity, so that offerors can price this scope consistently? A. Per SOW Section 1.1, "If active mold is identified at any point, the Contractor is responsible for its treatment." The SOW does not mention a separate CLIN, unit price, or a not-to-exceed quantity for this work.

3. Sanitization installation basis and Building 1410 Gunter scope.

(a) For the ducted sanitization buildings 1430, 1431, and 696 (CLINs 0013, 0014, and 0015), please confirm whether one active in-duct air treatment device installed at the air handler supply per building satisfies the requirement, or whether a different installation basis is required. For example, the previous SOW specifically asked for .02 PPM of encapsulated hydroxyl groups. A. Section 2.2 defines the technology requirements (hydrogen peroxide vapor, zero ozone, etc.) that the proposed system must meet for the entire space.

(b) Building 1410 Gunter (CLINs 0012 and 0016) is served by approximately 90 chilled-water fan coil units, one per room, plus a separate ducted supply-air system. For cleaning under CLIN 0012, does the required scope include the individual fan coil units and their coils and drain pans, the central supply-air ductwork only, or both? For sanitization under CLIN 0016, is the active air treatment system required at each fan coil unit, in the central supply-air duct only, or both, and on what device basis? The fan coil units recirculate room air locally and are not treated by a device placed in the central supply-air duct, so the answer materially affects technical approach and price. A. the entire air conveyance system. This includes supply and return ducts, registers, grilles, diffusers, and air handling units

(c) Building 1410 Gunter currently has active air purification units installed and operating in the central supply-air duct. Please confirm whether CLIN 0016 requires installation of a new active air treatment system in this building, and if so, whether the existing equipment is to be removed, replaced, or supplemented, and whether the new system is required in the central supply-air duct only or also at the fan coil units, consistent with question 3(b). A. SOW Section 1.1 states that buildings 1430, 1431, and G1410 have "existing sanitizing equipment that will require upgrade or change out

4. Post-remediation verification scope and sampling.

(a) How many verification samples are required per building under SOW paragraph 2.3? A.

(b) For the buildings receiving cleaning only and no Phase 2 installation, is only the Phase 1 post-cleaning surface verification required, with the Phase 2 airborne verification limited to the four buildings receiving sanitization (CLINs 0013 through 0016)? A. Yes, the SOW links the "airborne spore trap analysis" to the "Post-Installation (Phase 2)" verification (Section 2.3), which applies only to the four buildings receiving the sanitization systems. The surface sampling is linked to "Post-Cleaning (Phase 1)" and applies to all cleaned buildings.

5. Verification standard. SOW paragraph 2.3 sets a post-installation airborne acceptance standard comparing indoor samples to an outdoor baseline. A. reference IICRC S520 requirements.

(a) Microbial growth was observed outside the air conveyance system during the site visit. Such sources can cause an airborne verification to fail yet remediating them is outside the defined cleaning and installation scope. Please confirm this is outside the scope of this requirement, or that it is separately compensable under a defined CLIN or unit price. A. The SOW defines the scope of work as the HVAC systems and their components (Section 1.1, 2.1). It does not mention remediating microbial growth on surfaces outside of the air conveyance system.

(b) When HVAC systems are returned to service after cleaning, they re-entrain airborne particulate from the occupied indoor environment, which is frequently not at Condition 1. Please clarify how the post-cleaning verification is expected to be maintained under that condition. A. the air quality tests should verify the samples.

(c) The permitted active air treatment technologies reduce microbial viability rather than physically removing airborne particles, and are generally not labeled for airborne microbial-reduction efficacy, while spore-trap analysis counts total spores without distinguishing viable from non-viable. Please clarify the acceptance metric and verification method for Phase 2 so the metric matches the function of the installed technology, for example a culturable sampling method or a defined equipment-performance test. A. the printouts from the samples will be the verification method.

6.Will USG provide photos from the Site Visit? A. No

7.When does USG expect to award the contract and provide NTP? Review Sam.gov combo. 10JUL25 at 1200PM

8.What is the purpose of the pre-remediation verification testing (SOW 2.3)?

0. If pre-remediation testing is required, is the requirement for both surface and air sampling? A. to be able to verify environmental impact currently known

0. What is the expected number of pre-remediation sampling protocols? A. 1

0. Will contractors be allowed to take pre-remediation samples while dorms are still inhabited? A. Yes

9. Please verify the supply air flow of the AHUs for each facility. A. See As built drawings

10. Does phase II sampling need to occur within the duct work as well? A. Yes

11. Must the Qualified 3rd party be the one to take the samples or can they just be the one performing the testing? A. Yes

12. Does USG require phase II system installation immediately after duct cleaning and surface sampling is completed? A. Yes

13. Is only the supply and return ductwork required to be cleaned internally or is exhaust duct included as well? A. No

14. Are associated Air Handler Units, VAV Boxes and/or Fan Coil Units required to be cleaned? A. the cleaning includes "supply and return ducts, registers, grilles, diffusers, and air handling units

15. If there are stand alone wall fan coil units or unit ventilators are those required to be cleaned? A. Yes

16. Please confirm that hard surfaces (e.g. walls/Ceilings) are not required to be cut into in order to facilitate cleaning. A. No

17. Are prevailing Wage Rates / Davis Bacon Wage Rates required and if so, please provide. Updated on Sam.gov.

18. Please confirm that cleaning is required to remove dry/loose debris (e.g. staining is not required to be removed). A. Yes

19. My team cannot find reference to specific testing requirements in the IICRC S520 standard. Would USG be able to reference a specific section where sampling/testing information is provided? A. The SOW (Section 2.3) references IICRC S520 as the standard for achieving "Condition 1" post-cleaning but does not cite a specific section within that standard.

20. With answers being provided potentially by 7 July, would USG consider a proposal due date extension? No.

21. Can USG provide the Air Handler mechanical schedules for each facility? A. No

22. Could USG provide the CFM of each AHU? Same as #9

23. SOW Section 2.3 references “pre- and post-remediation verification performed by an independent, qualified third-party.” However, 2.3, subsection 1 only references “Post-Cleaning (Phase 1).” A. Pre and post verification is required

a. Can USG verify that no pre-cleaning testing is required? A. Yes

24. Is USG capable to extend the 150 day period of performance if need be? No

25. Would USG be capable to keep personnel out of all facilities if an offeror proposed to work on every facility simultaneously? A. No

26. Does Phase 2: Air Sanitization System Installation in 1430, 1431, 696 and G1410 and the follow-on Air Quality Sampling occur only after the Phase I Duct work cleaning in all facilities is completed? A. As each facility completes

27. When does USG expect to post Q&A to SAM.gov? 7JUL26

28. Is there an incumbent providing same/similar services to Maxwell AFB?

a. If so, who are they, what was their winning, contract number, and SOW? No.

29. Could USG verify the set-aside requirements for this solicitation? No set aside.

30. Could USG verify if “Attachment 6 Provisions And Clauses-Clean And Sanitize Dorm Ducts v2” is meant to superseded Attachment 2? Updated sam.gov

31. Will USG provide the sign-in sheet on SAM.gov once the Site Visit is concluded? No.

32. Is there a specific number of samples to be collected per square foot of building space? A. This is a duplicate of Question 4a.

33. Is there a minimum number of days of sampling required per facility? A. No

34. Could USG provide the number of AHUs serving each building and the Supply CFM of each AHU? A. see question 9

35. Please verify that only Buildings 1430, 1431, 696 and G1410 require the Phase II Air Sanitization System Installation and airborne spore trap analysis. A. See question 4b

36. Page 5 of the combo states “Manufacturer Specifications: The offeror’s provided manufacturer specifications will be evaluated to ensure they are sufficient in detail to clearly demonstrate their capability of providing all of the required items for CLIN 0002 as outlined in the attached Statement of Work (SOW) Paragraphs 2.0-2.3” Updated on sam.gov

a. Is there a reason only CLIN 0002: Duct Cleaning Bldg 1431 is referenced here? Updated on sam.gov

37. Will offerors be permitted to work on multiple facilities concurrently, or is the expectation to work on one facility at a time during the 150 days? A. the expectation is to do one at a time so dorm space is not limited

38. Building G1410 had 1 AHU that had 5 DW 8000 & 1 DW 16000 already installed are you looking to have this system replaced with a new sanitization system? A. SOW Section 1.1 states the existing equipment in G1410 requires an "upgrade or change out."

39. Building G1410 had unit ventilators in each of the dorms, are these to be cleaned? A. Yes

40. Please confirm we are only cleaning HVAC ductwork and no bathroom exhaust. A. buildings where the venting is directly outside will not require cleaning, facilities that exhaust into the facility system will need to be cleaned

41. Please confirm that all sanitization system & equipment will be placed at the AHUs only. A. the entire air conveyance system. This includes supply and return ducts, registers, grilles, diffusers, and air handling units

42. Please confirm total AHU count for Buildings 1430, 1431 & 696. A. the contractor should verify in person

43. Are we doing any unit ventilator in any of the buildings or only what is connect to the AHUs? A. the entire air conveyance system.

44. Is the awarded contractor expected to replace filters? If so, can sizes and quantities be provided? If not, will the government provide new filters to be installed after cleaning? A. No

45. How many tape samples are expected to be collected per building and/or per unit cleaned? A. See answer 4a

46. How many air samples are expected to be collected per building and/or per unit cleaned? A. See answer 13

47. What UV system (manufacturer & model) does the Government expect to be installed? Does the Government have a preference or are they willing to share the manufacturer/model the previously awarded (but unqualified) contractor selected? Currently, the SOW incentivizes prospective bidders to select the cheapest option. A. The SOW (Section 2.2) does not specify a UV system

48. Is cleaning of dryer vents and/or bathroom exhaust lines included in the base scope? A. No

49. Is Fiberlock IAQ 8000 an acceptable product to be used as an encapsulant? A. The SOW does not mention encapsulation or any specific encapsulant products.

50. Is Fiberlock Shockwave RTU an acceptable sanitizing agent? A. Phase 2, Section 2.2 specifies a hydrogen peroxide generation system for sanitization, not a chemical sanitizing agent applied during cleaning.

51. What certifications are required for the Industrial Hygienist? A. The SOW (Section 2.3) requires verification by an "independent, qualified third-party (e.g., an Industrial Hygienist)" but does not specify particular certifications for this

52. Will prospective bidders' previous experience on Federal duct cleaning projects be considered in the award decision? No

53. Please confirm whether this procurement is restricted to small businesses or is an unrestricted open-market acquisition. Unrestricted

54. What is the typical processing timeline for contractor base access at Maxwell AFB, and can any personnel or vehicle access steps begin before award? No prior to award coordination. Outside our control, dependent on 42SFS and individual background checks.

55. If active mold is identified, should mold remediation be included in the firm-fixed-price CLINs, or would it be handled by separate modification/change order? A. SOW Section 1.1 states the contractor is responsible for mold treatment, implying it is included in the base price

56. What is the Government’s review and approval process for the proposed Phase 2 air sanitization technology, and what is the expected review timeline? A. Timeline will be discussed at the preconstruction meeting

57. Do Buildings 1430, 1431, 696, or G1410 currently have any air treatment, UV, ionization, or purification systems that must be removed, decommissioned, or integrated? A. Section 1.1 states that for buildings 1430, 1431, and G1410, "existing sanitizing equipment.

58. Please confirm whether Attachment 5 drawings are current/as-built and can be relied upon for pricing. A. the as built drawings were provided to give you the basic idea of the system at construction time. Changes could have been made that are not recorded and you will have to verify potential changes,

59. Will the Government allow progress payments or partial invoicing by building/phase after acceptance, or is payment only made after full project completion? No

60. Which Wage Determination labor classifications apply to Phase 1 duct cleaning and Phase 2 system installation personnel? Updated on sam.gov.

61. Does the Industrial Hygienist/third-party testing firm require Government pre-approval, and should reports be submitted directly to the Contracting Officer as formal deliverables? A. See question 51 answer