NYC 9/11 Public Portal Document
C. Closed conduit.
2.5 PARTITIONS
The Abatement Contractor shall ensure that structural partitions separating the North side
work area from the rest of the floors are built to separate the full-containment Work
Area(s) from non-work areas in all openings larger than 32 square feet except where any
one dimension is one foot or less. The opening in the building facade on the North side
as a result of the WTC collapse will remain open.
Partitions shall be constructed of:
a. Conventional 2" x 4" (minimum) fire-retardant wood or metal stud framing,
maximum 16” center-to-center spacing.
b. Fire-retardant plywood or other solid material of at least 3/8" thickness shall
be applied to the work side of framing.
c. Partitions shall be caulked and sealed at all joints and seams.
2.6 PLASTICIZING
Only isolation barriers will be installed. The work area side of all isolation barriers will
be plasticized with two sheets of 6 mil fire retardant plastic sheeting .
2.7 ENGINEERING CONTROLS
Prior to mobilization, the Abatement Contractor shall submit to the Environmental
Consultant the manufacturer’s specification of each model of negative air unit to be
utilized on the project.
The Abatement Contractor shall provide for and be responsible for the following;
A. Negative air units shall be continuously monitored for proper operations and
maintenance of filters.
B. Negative air units shall utilize a dedicated power source with GFCI. Multiple
units shall be turned on one by one to ensure that integrity of plastic barriers is
maintained.
C. Negative air units shall run continuously from beginning of isolation until
successful air clearance results have been obtained.
D. On each floor, the Abatement Contractor shall maintain a minimum of six (6)
units. The Abatement Contractor shall also maintain a sufficient number of spare
6
NYC-WTC_000154689
OCR can misread numbers and units. Confirm readings against the page image before using them.