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

4.0 TARGET PARAMETERS/COPCS In February 2002, a multi-agency task force headed by the USEPA was formed to evaluate indoor environments for the presence of contaminants related to the WTC terrorist attacks that might pose long-term health risks to local residents. As part of this evaluation, a task force sub­ committee was established to identify Contaminants of Potential Concern (COPC Committee) that are likely associated with the WTC disaster and establish health-based benchmarks for those contaminants in support of planned residential cleanup efforts in Lower Manhattan.

In addition, a number of other studies conducted by USEPA (EPA/600/R-03/142 December 2003) and work performed by Louis Berger Group were examined as a means of establishing a listing of target parameters appropriate to satisfy the purpose and objectives of the current deconstruction project. These objectives include active real time monitoring of dusts potentially related to the Jeconslruciion as well as identifying levels of COPC associated with the materials at 130 Liberty. In this manner the deconstruction project can proceed while providing an ample margin of safety for human health and the environment in the vicinity of the project site.

USEPA approved an air monitoring program for use during the deconstruction of 4 Albany Street, another building contaminated by WTC dust as a result of the WTC disaster. This Plan entitled “Specifications for Community Environmental Air Monitoring During the Abatement and Demolition of 4 Albany Street’’ was issued as approved for use by USEPA and NYCDEP on December 22, 2004. The target parameters identified for monitoring during this abatement and deconstruction program were also considered in the course of developing the list of target parameters for the 130 Liberty Street property.

Based upon these criteria the following target parameters were selected for inclusion in the monitoring program:

• PMio-Respirable Particulate • PM2.5-Respirable Particulate • Asbestos • Crystalline Silica • PCDDs/PCDFs • PAHs • PCBs • Metals (antimony, barium, beryllium, cadmium, chromium, copper, lead, mercury (gaseous and total) manganese, nickel and zinc).

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NYC-WTC_000231988