EPA work plan review, 133-135 and 21-23 buildings, August 2005

NYC 9/11 Public Portal Document

Part II- Environmental Community Monitoring Plan 133-135 Greenwich & 21-23 Thames Streets Airtek Project 05-0701 — Rev 1 August 11, 2005

Extensive effort and cost has been invested in working with the NYC Department of Education to provide engineering controls and testing support to protect the educational facilities at 100 and 90 Trinity Place. Detailed information on these efforts is included in Attachment II to Part I of this submittal — "Work Plan."

1.3.2 125 Greenwich Street

Specific measures are planned to monitor the impact of the project on the 125 Greenwich Street building. One of the Environmental Community Air Monitoring stations specified in this document (school auditorium roof station) is directly adjacent to this building (within 20'). In addition, the Environmental Consultant will conduct Abatement Phase work area monitoring continuously during abatement phase work shifts between the project site and the 125 Greenwich Street building.

1.3.3 Bldg. South of Thames Street

This building, across Thames Street from the Project Site, will be separated from the project site by two Environmental Community Air Monitoring stations. In addition, during the Abatement Phase, extensive work area monitoring will be conducted on Thames Street.

1.4 Environmental Sampling and Analytical Methodologies

Sampling and analytical methodologies utilized for this Project, will comply with published protocols from EPA and/or National Institute of Occupational Safety and Health ("NIOSH"). Where appropriate other published standards may be substituted and project-specific adjustments to protocols may be made. Generally, sampling will be conducted once every 24-hour work period, except or asbestos (TEM samples), which will be taken for the duration of every work shift and once a day during non-work days during the abatement phase. Real-time particulate monitoring will be on a continuous basis. Instantaneous mercury readings will be obtained to evaluate the air quality around the work site at multiple locations each work day.

2.0 Visible emissions

2.1 Abatement Phase

At the commencement of each work shift, the Environmental Site Hygienist will conduct a thorough inspection of all engineering control systems including containment barriers, and negative air control systems, and exterior. If any visible emission is noted on the exterior of the work area, all work will be stopped and not restarted until an evaluation of engineering controls has identified and corrected the cause of the emission. The evaluation may include, but is not limited

NYC-WTC 000134944