NYC 9/11 Public Portal Document
Mr Rajappan Radhakrishnan — NYC DEP
133-135 Greenwich Street and 21-23 Thames Street
Airtek Project 05-0701— June 9, 2005
• 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.
Monitoring:
Community Monitoring: Perimeter monitoring for asbestos will be conducted at
five points around the subject facility. Background sampling prior to any
abatement activity will be conducted, and monitoring will continue until fmal
clearance testing is acceptable. All perimeter asbestos testing will be by
Transmission Electron Microscopy (TEM AHERA Rules). Metals perimeter
testing will by NIOSH 7300.
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
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
NYC-WTC 000127732
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