NYC 9/11 Public Portal Document
Mr Rajappan Radhakrishnan — NYC DEP
133-135 Greenwich Street Variance Request
Airtek Project 05-0701— August 11, 2005
We proposed to use Attachment FR - Procedures for use of Foam or Similar Viscous
Liquid in Removal of Asbestos Containing Roofing (ACRM) in New York City
In-place ACM has been identified as follows:
1. Bulkhead Tar —10 sf
2. Roof Flashing — 35 sf
These materials will be abated last in the decontamination sequence. For detailed
information on the asbestos survey conducted, please refer to the Airtek Asbestos
Survey Report dated May 31, 2005 (Attached).
Utilities - General:
Utility service is currently cut off to the building. All electricity and water required for
the work will be drawn from sources outside the building.
Project Monitoring:
Project Monitoring: Throughout the decontamination activities, project air monitoring
will be conducted in addition to the Perimeter Monitoring described above. Project
Monitoring will be conducted in strict accordance with RCNY Title 15 Chapter 1,
Section 1-41 to 1-45, with the exception that all sample analyses will be by TEM.
Clearance Testing: Aggressive area clearance testing for asbestos will be conducted for
all work areas by TEM. Aggressive clearance testing for metals will be conducted by
NIOSH 7300.
Clearance Criteria:
Clearance testing for asbestos will be acceptable when all samples for a given work area
meet the 70 structures per square millimeter TEM standard. Clearance testing for metals
will be acceptable when all samples meet the following criteria:
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
NYC-WTC 000134904
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