EPA review letter, 133-135 Greenwich Street

NYC 9/11 Public Portal Document

Part II - Environmental Community Monitoring Plan 133-135 Greenwich & 21-23 Thames Streets Airtek Project 05-0701— Rev 2 September 16, 2005

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.

2.2 Demolition Phase

During each work shift, the Environmental Consultant will observe demolition operations to monitor visible dust in the air and suppression measures being applied by the demolition 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.

2.3 Notification

The EPA Region 2 office and NYCDEP will be notified as promptly a& reasonab1yesibIe of any visible emission observed by the Environmental Consultant to cross the property line of the Buildings. The Environmental Consultant will promptly advise the EPA Region 2 office and the NYCDEP of the corrective actions taken. A report of inspection results and corrective actions taken will be provided to the EPA Region 2 office and NYCDEP within 2 business days of any incident showings► visible emissions.

3.0 Abatement Phase Air Monitoring 3.1 Visible Emissions

Monitoring for visible emissions will be conducted as described above in Section 2.0 of this cation.

3.2 Community Monitoring

Prior to the c encement of any site work, one week of background community air monitoring will be conducted as detailed in Table 1— Community Air Monitoring in Attachment A (Community Monitoring) to this specification. Community Air Monitoring as detailed in Table 1 will continue through the Abatement Phase and until completion of the Demolition Phase.

Community Monitoring locations are identified on the drawing included in Attachment C (Community Monitoring Locations) to this specification. The locations include the roof of the school auditorium on Cedar Street, the sidewalk bridge on Thames Street, and at ground level at the intersection of Thames and Greenwich Streets.

If the environmental air monitoring 1 ed to be changed during the abatement phase due to site condition NYC DE and USEPA Region 2 office

NYC-WTC 000134234