NYC 9/11 Public Portal Document
Mr Rajappan Radhakrishnan — NYC DEP
133-135 Greenwich Street Variance Request
Airtek Project 05-0701— June 9, 2005
• Antimony 250 ug/m3
Barium 250 ug/m3
Beryllium 1.0 ug/m3
Cadmium 5.0 ug/m3
Chromium (III) 250 ug/m3
Copper 500 ug/m3
Lead 25 ug/m3
Manganese 100 ug/m3
Mercury 12.5 ug/m3
Nickel 50 ug/m3
Zinc 1,000 ug/m3
Exterior.
The exterior of the building was decontaminated as a part of the NYC DEP
Building Exterior Cleaning Program following 9/11/01. Airtek's visual inspection
of the facade indicates that it is advisable to conduct low-pressure power washing
prior to initialing demolition activities. The exterior of the building will be
cleaned in accordance with the NYC DEP WTC Dust/Residue Roof & Façade
Cleaning Procedures (attached).
. Interior:
Phase 1— Access Facility:
In order to allow a working space for access/egress, and to keep the
Decontamination facility out of the work area, a preliminary soft strip and clean-
up of the 133 Greenwich Street retail store area. This abatement will be conducted
according to Subchapter G with a Personnel Decon exterior to the building.
Attachment DW will be used to allow the cleaning of the small amount of waste
for this preliminary phase. Upon satisfactory Clearance by TEM, this Decon will
be dismantled, and a Decon facility will be established in the cleaned entry space
to support the balance of the decontamination.
Phase II— Soft Strip:
All interior materials, including moveable objects, will be subject to
decontamination and removal or, if porous, will be bagged and disposed of as
ACM waste. All ceiling systems (plaster, tiles, sheetrock, etc.), wall systems
(plaster, wall
board, etc.), and floor systems, (tiles, carpet, etc.) will be removed
and bagged for disposal as ACM waste. Remaining structural members, pipes,
boiler, freezer boxes and roof mounted HVAC units will be wet-wiped, HEPA
vacuumed, and encapsulated with a penetrating encapsulant. All accessible
• interstitial spaces will be wet-wiped, HEPA-vacuumed, and encapsulated.
NYC-WTC 000127784
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