Asbestos bulk sampling letter, 99 Church Street, May 2002

NYC 9/11 Public Portal Document

MINIMUM CONTRACTOR REQUIREMENTS

MINIMUM CONTRACTOR REQUIREMENTS FOR THE REMOVAL OF ASBESTOS-CONTAINING DUST AND ASSOCIATED DEBRIS FROM WITHIN SELECTED FLOORS/AREAS OF 100 CHURCH STREET NEW YORK, NY 10013 AMBIENT GROUP INC., PROJECT #211334

1.0 PROJECT SUMMARY

1.1 The Work includes cleanup and disposal of asbestos-containing material (ACM) and or contaminated dust from selected floors/levels located within 100 Church Street. The accumulation of dust was the result of the recent World Trade Center collapse. Dust and pulverized building construction debris has migrated into selected areastfloors of the building through penetrations/openings in the building's exterior facade. The cleanup work shall be performed in a phased approach on a floor-by-floor basis. After proper isolations barriers and decontamination units have been erected, multiple floors can been cleaned simultaneously. On floors where contaminated areas are separated by clean areas, work in respective areas cannot be started until unaffected areas and decontaminated areas have been Isolated from the new work area. Cleanup work shall be accomplished using individuals certified by the New York City Department of Environmental Protection (NYC DEP) as asbestos handlers. All work shall be performed in accordance with Title 15, Chapter 1 of the Rules of the City of New York.

1.2 All affected horizontal surfaces including the suspended ceiling tile shall be treated as a contaminated surface. Prior to commencing any floor/area cleanup, review with the Environmental Consultant and/or a representative of the Owner for identification of the respective work area boundaries on each affected floor. Refer to attached floor plans for general boundaries of selected areas to be decontaminated.

The Work of this project shall be accomplished as follows. The tasks need not be performed in sequential order.

• 1.1 Confirm that the Building's Air Circulation System is not operating. All cleanup activities shall be performed prior to re-activation of the Building's Air Handling Equipment.

1.2 Construct a remote decontamination unit in a location, which can effectively be utilized for the required work within each respective floor. Thoroughly clean this area prior to the construction of the decontamination unit using wet wiping and/or HEPA vacuuming procedures.

1.3 As directed, clean interior surfaces of selected Building's Air Circulation System at each fresh air intake/plenum upstream of the filters. Remove all system air filters and dispose as contaminated material.

1.4 At each respective floor/area where cleanup is required, seal all penetrations, broken windows, breaches in building's facade, etc. with 6-mil poly and duct REMOVAL OF ACM DUST PAGE 1 ZAR Realty • Selected floors/Areas 100 Church Street

NYC-WTC 000124244