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

1.2 Project Purpose and Objectives

The principal purpose of the air monitoring program is to monitor air quality in the vicinity of 130 Liberty Street during the deconstruction of the building on that property. The Proposed Plan consists of monitoring of dusts in the vicinity of the deconstruction site on both a real-time or continuous basis as well as a time-weighted or integrated basis.

Principal objectives of the program are as follows:

• Monitor dusts as PMio and PM2.5 on a real-time or continuous basis such that dust associated with the building deconstruction are maintained below target and trigger action levels.

• In the event that dust levels exceed target and trigger action levels, building deconstruction management personnel will be immediately notified so that all necessary corrective actions can be taken.

• Monitor PMio and PM2.5 on a time weighted or 24-hour average basis to provide assurances that levels of respirable particulate matter associated with the deconstruction are below 24 hour National Ambient Air Quality Standards (NAAQS) of 150 ug/m ' and 65 ug/m^, respectively.

• Collect particulate matter on a time-weighted or integrated basis such that samples are available for monitoring of target compounds potentially associated with World Trade Center dust (e.g., asbestos, lead).

• Compare measured concentrations of project target parameters to action levels established on a compound specific basis. In the event that measured concentrations exceed any project specific action level for one or more of these target compounds, appropriate corrective actions immediately will be taken.

1.3 Overview of Air Quality Monitoring Programs and Features

There are multiple aspects and levels to the overall air monitoring program proposed for the deconstruction of 130 Liberty Street. The following is a brief summary of the three (3) components or levels of air monitoring proposed for the project:

• “Level 1”: The subcontractors performing aspects of Phase I deconstruction work (largely interior, non-structural efforts) will be responsible to collect air samples on their personnel directly performing various work activities to determine airborne levels of contaminants potentially generated by the work at the source as required by OSHA.

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