Environmental sampling report summary, 250 Broadway, Oct 2001

NYC 9/11 Public Portal Document

NYCHA's Technical Service Department and Employee Health & Safety Compliance Office worked closely with the AmTrust Realty Corporation (AmTrust) to insure that NYCHA's Offices in 250 Broadway were safe for re-occupancy by September 21, 2001. NYCHA performed the following prior to reopening 250 Broadway:

✓ Visually Inspected the HVAC System (Air Handling Units and Supply Ducts) and NYCHA rental spaces for damage and dust/debris. No damage or extraordinary dust accumulations were observed. ✓ Performed sampling for asbestos and lead in dust. No asbestos fibers were detected within the Building. See Attachment A for analytical results. Elevated lead in dust levels was found in several of the dust samples. Please be aware that NYCHA used the most protective standard under HUD, 40 micrograms of lead per square foot (µg/ft2), to evaluate the risk from lead in the settled dust within the air handling units and tenant spaces. This standard is used to determine whether children may re-enter an apartment after lead has been removed or abated. NYCHA cleaned the air handling units and NYCHA spaces until all dust sample results were below 40 µg/ft2. The Laboratory Analytical Reports for the lead in dust samples can be found in Attachment C. ✓ Performed an exposure assessment for lead on a worker cleaning the air handling units. The results were negative. The Laboratory Analytical Reports for the sample can be found in Attachment C. ✓ Power washed the exterior sidewalks and the building exterior up to the second floor ✓ Cleaned all Public Spaces through out the Building v' Cleaned within a 10 foot diameter of each supply duct diffuser and perimeter register in each NYCHA space ✓ Cleaned the Air Handling Units and pre-filters for the 4`" Floor Computer Room building Please note that representatives of NYCHA's Construction Department found the structurally sound.

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NYC-WTC 000105966