VA259-17-R-1086-00009001.pdf

RFI #4

1. At areas where the construction will breach corridor walls as shown on sheet AD-101, will the barriers be permitted to be “Edge Guard” style panels via ILSM or will they need to be of 1HR construction.

a. At areas where the construction will breach corridor walls as shown on sheet AD101 the barriers need to be 1 HR fire wall construction.

2. Will a HEPA cart allow you to do all of your corridor work or is full containment, including above ceiling space required.

a. Yes, HEPA cart allow to do corridor work above ceiling space.

3. Isolation of HVAC systems in the construction area will necessitate T&B of pressure relationships in adjacent areas served by the same HVAC systems. Is this in your scope?

a. Isolation of HVAC systems in the construction area will put construction area in negative pressure relationships in adjacent areas. Pressure monitoring meter is required to be installed to monitor pressure in construction area relationships to adjacent areas. The construction area has to maintain negative pressure -0.01 to adjacent areas. T&B is not required during construction as long as the construction area maintains negative pressure meter shown -0.01 to adjacent areas.

b. T&B is required after construction completed to balance supply air and retune air CFM in rooms as shown in construction drawings.

4. Due to the layout of this job, there is not a wonderful place for an ante-room, will it be permissible to place one in the hallway so long as it does not encroach on the 3’8” clearance.

a. It will be permissible to place ante-room in the hallway.

5. Is air sampling required? If so, how many, and with what frequency.

a. The air sampling is not required.

6. Is there any Asbestos in the space above the ceilings?

a. There may have asbestos on duct sealant but there is no asbestos insulation on pipes. There is an asbestos in floor tile mastic.

7. Are the perimeter walls of the work area constructed to the deck above?

a. No, the perimeter walls stop above the ceiling.