WTC indoor air quality approach draft, May 2002

NYC 9/11 Public Portal Document

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preventing inhalation exposure to asbestos and other fibrous materials, as well as other potential indicator compounds. Program: EPA will clean one unoccupied building to confirm and test the techniques. Projected Cost: $5 million. This cost is higher than in the above efforts because it will involve sampling for several potential indicators of WTC related contamination before work is commenced, will involve use of several modifications of cleaning techniques with post clean up sampling and re-cleaning if necessary.

4. Cleaning of Debris-Laden Unoccupied, Uncleaned Buildings

Objective: Since the debris removal from the immediate areas of destruction in the WTC complex is nearing completion, the remaining unoccupied, uncleaned buildings must be cleaned. This will prevent debris/dust from being re-entrained in air and/or re-contaminating the nearby areas with debris/dust. Program: NYC will clean the remaining unoccupied (residential and commercial), uncleaned buildings near the WTC site that contain WTC-debris. NYC will work with building owners to determine reasons that these buildings have not been cleaned yet. If building owners are not able to expeditiously clean their property, NYC will proceed. Projected Cost: $20 million, based upon estimates approximately $2 million/building for 10 buildings. Inventory of buildings is being identified by NYC and may be decreased as a result of NYC=s efforts to get building owners to conduct clean up. Status ofRequestfor FEMA mission assignment: Awaiting initial FEMA feedback

5. Clean Up of Exteriors of Buildings with Residual Debris/Dust

Objective: To eliminate remaining debris/dust resulting from the WTC collapse on building exteriors in Lower Manhattan thereby assuring this material will not become re-entrained in the air at a future time, thus creating a potential exposure to the public. Program: NYC DEP will contract for the cleaning of file exteriors of approximately 250 buildings in Lower Manhattan. EPA, NYCDEP and OSHA will oversee contractors. Projected Cost: NYC $10.28 Million Project Period: April 2002 fiirough November 2002

B) Longer Term:

< Identify potential compounds of concern, which resulted from the WTC collapse and subsequent fires and for which there is ambient data to suggest potential concern and which have not been evaluated in the indoor environments thus far. < Conduct sampling of the potential compounds of concern to establish a NYC specific background data set. < Create a Data system for Organizing Existing Information Collected by NYC from the Private Sector on environmental testing results and clean up activity.

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