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

5.7.2 PCBs

Each site will have one (1) SKC Leland Legacy pump equipped with a glass cylinder containing a PUE plug. Samples will be collected at a flow rate of five liters per minute with a sampling period of approximately 24 hours for a resulting total air volume of 7.2 m\

5.8 Visible Emissions

Visible emissions during the deconsti-uction project will be monitored as follows:

Abatement Phase

During each work shift, the Environmental Consultant will be tasked with observing the Building’s containment barriers and exterior. Special attention will be paid to established isolation barriers and area(s) of high emission potential to identify any visible emissions. If any visible emission is noted exterior of the work area, the work will be stopped and an immediate evaluation of in-place engineering controls for the emission location will take place. The evaluation may include, but is not limited to, work activities and smoke testing of the isolation barriers. Any damaged or malfunctioning engineering control will be repaired immediately. The work will not be restarted until engineering controls are repaired or determined to be functioning properly.

Deconstruction Phase

During each work shift, the Environmental Consultant will observe deconstruction operations to monitor visible dust in the air and suppression measures being applied by the deconstruction contractor. The Environmental Consultant may, depending on the severity and duration of dust condition, order a stoppage of the work or require modified work practices to reduce visible dust.

Notification

The EPA Region 2 office and NYCDEP will be notified promptly of any visible emissions observed to cross the property line of the Building, as well as promptly advised of the corrective actions taken.

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CITY_DEP_WORBY_CANNATA_SUBP_000057083

NYC-WTC_000231993