Remediation report cover, 30 Warren Street, January 2006

NYC 9/11 Public Portal Document

Environmental Site Characterization — Facade Report Fiterman Hall — 30 West Broadway, New Yoric, NY Airtek Project 05-0867 —January 10, 2006

4.0 PROJECT-RELATED CONCLUSIONS

4.1 WTC Dust Impact - Exterior Cleaning Requirements

Only the ground floor, portions of the second floor and the gash area must be subject to focused cleaning by a certified abatement contractor. This will be conducted by the Contractor as a part of the Remediation or Deconstruction Phase of the project. This will allow the erection of the project exterior scaffold to be delayed until the scaffold is needed for deconstruction work

4.2 Facade Integrity

With the exception of the gash area, the facade is intact. The facade system was designed and built to be an impermeable barrier, and it has retained these qualities. The window systems are in excellent condition and are a serviceable barrier for use during the abatement. The installation of plywood/plastic critical barriers over the windows is not necessary to carry out the remediation of the Building. The operating awning-window panels can be sealed with caulk and critical barriers for the remediation phase. This, too, will allow the erection of the project exterior scaffold to be delayed until the scaffold is needed for deconstruction work.

4.3 WTC Dust Impact — Facade Components

The exterior of the facade was effectively cleaned by the NYC DEP facade cleaning program. Build-up of urban road dust on the ground 'floor and isolated pockets of WTC debris will be subject to focused cleaning by the Contractor. The gash area will be cleaned from the slabs themselves. The interior of the facade will be cleaned during the Remediation Phase of the project.

4.4 Asbestos-Containing Building Materials

Asbestos-containing materials exist on and within the facade, but neither of these ACBMs impact the facade's integrity as a contaminant barrier during the Remediation Phase of the project. The interior vapor barrier will be abed during the remediation phase of the project, and the non-friable lintel flashing will be abated during the Deconstruction Phase of the project.

4.5 Lead-Based Paint Components

Facade components are not coated with lead-based paint.

NYC-WTC 000096509