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← Document results/DEP Box 50/225 RECTOR PLACE Block: 16 Lot: 70 BIN: 1000053 210 SOUTH END AVENUE
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Air sampling summary letter, 225 Rector Place, Jan 2002

Machine-extracted title · confidence 95%

Letter from environmental consultants summarizing ambient air sampling and cleanup activities at 225 Rector Place.

NYC-WTC_000123875–000124219

Folder label: “225 RECTOR PLACE Block: 16 Lot: 70 BIN: 1000053 210 SOUTH END AVENUE

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NYC 9/11 Public Portal Document

ATC Project No.: 09622-0013 Parc Place — 225 Rector Place January 18, 2002 Related Management Company, L.P. Page 3 Of 11

out the area to be 4. The work sequence commenced cleaning in the furthest comer working cleaned. during Representative ambient air sampling was performed between September 23 — 28, 2000 the Air Monitoring Data and and at the conclusion of cleaning activities. Attachment I contains Associates and by ATC Chain of Custody Forms (30 pages) for the ambient air samples collected two hallway analyzed by phase contrast microscopy (PCM). Samples were collected from sampled Apartments locations and three apartments on each floor of 225 Rector Place. ares/ identified in the following table. 5~. (60 / ('

.. Penthouse 11 23 10 22 = 9 21 8 20 7 19 6 18 5 17 4 16 3 15 2

12 Basement Garage

f/cc. However, particulate All areas sampled recorded fiber levels less than or equal to 0.01 of the samples the initial,._.anplysis matter raised by HEPA vacuuming activities obscured following apartment; p I I On 9-24-01 collected from the north side of the 15th and 2nd floors and recording 'six samples HEPA cleaning the 15th and 2nd floor hallways were re-tested with apartment was re- levels less than 0.01 f/cc. Following HEPA vacuuming of apartment [Pii , theother four samples tested recording a fiber level less than 0.01 f/cc, consistent with the collected from the seventh floor and does not present an issue at this time. concentrations below the NYC In conclusion, based upon the analytical results recording fiber is ATC's opinion acceptable airborne clearance requirement following an abatement action, it activites meet an the building during cleaning that the ambient air samples collected throughout acceptable criterion for re-occupancy.

ATC Associates Inc. © 2002

NYC-WTC 000124055

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NYC-WTC_000124055Source: NYC Law Department, mirrored locally

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