NYC-WTC_000231976

NYC 9/11 Public Portal Document

Section 2 - Ambient Air Monitoring Program Revision No.: 0 130 Liberty Street Deconstruction Plan Date: September 7, 2005 Lower Manhattan Development Corporation

3.0 SAMPLING PHASES Sampling phases will consist of the following segments: Background, Phase I - Preparation Phase, Phase I - Asbestos and COPC Abatement, and Phase II - Structural Deconstruction. General descriptions of the work included in each phase are presented below.

3.1 Background

The background ambient air sampling period will consist of two weeks (14 consecutive calendar days) of monitoring performed prior to the start of Phase I - Preparation Phase activities. Samples will be collected using the four (4) ground level stations in the monitoring network (Locations 1-4 in Table 1) and one (1) station located on roof of the fire house (FDNY 10-10 House). Target parameters and the frequency of sample collection will follow measures presented in Sections 4 and 6, respectively.

3.2 Phase I - Preparation Phase

The Phase I - Preparation Phase includes the erection of scaffolding and hoists on the full extent of the exterior of the building, construction of interior hoist vestibules, erection of sidewalk sheds and perimeter fencing, exterior negative pressure tent enclosures to implement the Pilot Program, roof cleaning, localized facade and general exterior area clean-up and the removal of existing netting on the exterior of the building.

3.3 Phase 1 - Asbestos and COPC Abatement

Phase I - Asbestos and COPC Abatement and Removal Phase includes the cleaning and removal of all interior surfaces and non-structural elements within the building under containment. The cleanup and abatement will be conducted so that the building at 130 Liberty (Building) can be safely deconstructed to allow for redevelopment of the WTC Site. Phase I of the Deconstruction Project will occur while the work area is placed under negative pressure containment and includes the following general categories: (a) the general area cleanup of WTC dust and debris, (b) removal and disposal of installed porous and certain non-porous building materials and components, (c) cleaning and salvage of certain installed non-porous building equipment and components, (d) removal of building materials containing asbestos which were present in the Building prior to September 11*, 2001 (referred to herein as “ACBM”), primarily within the Building interior, (e) packaging of asbestos and other regulated waste including, but not limited to light bulbs, lighting ballasts, batteries, mercury-containing thermostats, etc. at generation points, movement of containers to the decontamination unit and movement of decontaminated containers to waste loading using an exterior hoist or crane, and (f) cleaning of exterior surfaces of the Building (i.e., building washdown).

During all Phase I activities, a minimum buffer zone of three floors initially for the top three floors and then two floors thereafter, will be maintained between the active abatement and clean­ up (Phase I) area and the exterior abatement/structural deconstruction (Phase II) portion of the

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CITY_DEP_WORBY_CANNATA_SUBP_000057076

NYC-WTC_000231986