EPA review letter, 133-135 Greenwich Street

NYC 9/11 Public Portal Document

Part I: Work Plan — Decontamination/Deconstruction 133-135 Greenwich Street and 21-23 Thames Street Airtek Project 05-0701— Rev 4 September 29, 2005

Contractor will obtain all governmental permits necessary to perform the work including, but not limited to sidewalk bridges, D.O.T., etc.

Contractor will comply with requirements of all city, state or federal agencies (including OSHA) relating to the demolition work.

8.2 Dust Suppression:

The Contractor will be responsible to take precautions to prevent fugitive dust from escaping the site. As noted in the Project HASP, the Contractor has the responsibility to monitor for visible emissions. Dust suppression engineering controls will be the responsibility of the Contractor, and may include, but not be limited to the following:

Wet suppression: The use of water and/or amended water Site housekeeping via vacuuming/sweeping Limitation of free-fall of demolition debris Limitation of freefall during waste loading Sealed and/or covered transport

The listed controls are intended as a guideline. It is the responsibility of the Contractor to implement whatever engineering control is required (whether above-listed or not) to prevent fugitive dust.

Failure to suppress dust that results in visible fugitive emissions from the site will result in a work stoppage. Work will not be re-started until adequate corrective measures have been implemented to the satisfaction of the Site Hygienist. The procedures to be followed with regards to visible emissions are specified in the ECAMP (Part II of the Submittal).

8.3 Site Protection:

A sidewalk bridge exists along Greenwich and Thames Streets and will remain in place for the duration of Contractor's work. The sidewalk bridges have been installed and arc maintained by the LMDC, not the owner of the site. Contractor is responsible to protect the sidewalk bridge during demolition. In the event a portion or section of the bridge needs to be removed and/or relocated, contractor will coordinate this work with the bridge owner (LMDC or Owner).

The Contractor will be responsible for all temporary protection to any adjacent buildings and/or lots. Contractor will include roof top protection, sidewalk bridges as required to perform this work.

Contractor will maintain the project site, adjacent sidewalks and streets free from debris and garbage, including daily sweeping of sidewalks for the duration of contractor's work.

E

NYC-WTC 000134140