Permit application Part I, remediation Jan 2006

NYC 9/11 Public Portal Document

Regulatory Submittal Part I — Work Plan Fiterman Hall— 30 West Broadway, New York, New York Airtek Project 05-0867 — January 10, 2006

side of the Building, the exposed slabs and decks will be subject to HEPA vacuuming and wet-wiping, and new critical barrier walls (caulked stud & plywood walls, plus two layers of 6-mil polyethylene sheeting) will be established outboard of the existing temporary barrier walls. All exterior doors that are not to be used as Clean Zone entryways, or decontamination unit access/egress points will be locked and have critical barriers installed.

6.3.2 Establishment of Negative Air Pressure

Upon completion of the building envelope preparation, negative air pressure will be established in any area of the Building where work is to be conducted. Due to the large volume of the anticipated work areas, a NYS DOL Variance will be solicited to allow the use of smoke testing to verify negative pressure as opposed to manometer readings.

6.3.3 Material Shredder

In the south quadrant of the second floor (see Attachment IV — Remediation Phasing Plan 1-B) a penetration will be cut in the floor to allow the installation of a material shredder that will be used to reduce and package Gut-Strip building debris. The shredder will produce packaged debris that will then be processed through the decontamination units prior to loading for transport and disposal as asbestos at a minimum.

6.3.4 Work Areas

The entire structure will be established as one containment area. Negative air pressure micro-traps and exhaust manifolds will be established on each floor.

6.3.5 Removals

All interior materials, including moveable objects, will be subject to abatement and removal. They will be bagged and/or processed through the material shredder and disposed of as ACM waste at a minimum. Certain non-porous fixtures and other impermeable materials may be decontaminated by HEPA-vacuum and wet wiping. Efficacy of this decontamination will be determined by the Environmental Consultant as described in the WSMP (Submittal Part IV). All ceiling systems (plaster, tiles, sheetrock, etc.), wall systems (plaster, wall board, etc.), and floor systems, (tiles, carpet, etc.) will be removed and bagged or shredded for disposal as ACM waste at a minimum. Waste characterization testing as described in the WSMP will be used to make final waste determinations. All interstitial spaces (i.e., chases, shafts, wet columns, etc.) will be accessed, wet-wiped, and HEPA-vacuumed. Remaining structural members will be wet-wiped, HEPA vacuumed.

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NYC-WTC 000095752