EPA review letter, 133-135 Greenwich Street

NYC 9/11 Public Portal Document

Part!: Work Plan — Decontamination/Deconstruction 133-135 Greenwich Street and 21-23 Thames Street Airtek Project 05-0701— Rev 3 September 16, 2005

c. Tar — 2(~,sf- 410 2 ~ d. Window Caulk — 9sf 10 e. Coping Stone Caulk —1sf j 0 ~` f. Pipe Insulation —50 If

Per the requirements of the NYCDEP, these ma als will be abated last in the decontamination sequence. As such, care taken to protect these materials from disturbance and/or a soft-strip phase. Pipe insulation will be removed by NYC DEP loveba ocedures. For detailed information on the asbestos survey conducted, fer to the Airtek Asbestos Survey Reports dated May 31, 2005 (Attachment I).

7.4 Structural Framing/Masonry Façade

Due to the impossibility of removing structural framing without the risk of building collapse, all structural framing, and exposed masonry fagade will be wet- wiped, HEPA vacuumed, and encapsulated with penetrating encapsulant. Prior to commencement of conventional demolition, the remaining building components (anticipated to be principally wood framing and masonry fagade) will be tested by the Environmental Consultant for ACM content and RCRA characteristics, as noted in the WMP (Part IV of the submittal). These materials will be handled and disposed of as appropriate based on the test results.

8.0 Conventional Building Demolition:

8.1 Permits:

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. ContractorwiIt5ffip1yWff1i all pr isin the-New-Yeck-€ityBvilding-Code. -

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

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NYC-WTC 000134185