Air sampling summary letter, 225 Rector Place, Jan 2002

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 5 Of 11

November 28, 2001

PII Penthouse 23 P11 -lallway 22 21 PII 20 P'II aH llwa PII 19 PII aliwa 17 16 - ------ PI1- PII 15 Hallwa 14 -obb 12 PII selected as a criteria for acceptable In the absence of a specific ambient air standard, ATC hasrequirement following an asbestos ambient air sample sets, the AHERA re-occupancy per square millimeter (<70 abatement action of an average of less than 70 asbestos structures AHERA requirement is the the s/mm2) per sample set. This criteria has been selected because designed to be protective of most stringent reoccupancy requirement available, and has been children following an asbestos project. levels below the AHERA Based upon analytical sample results for all samples recording collected throughout the samples clearance requirement, it is ATC's opinion that the ambient air and that the areas of testing building are representative of the ambient conditions at the time tested meet an acceptable criterion for re-occupancy. Pool Roof Asbestos Abatement pool roof was determined to be Debris from the Trade Center collapse and deposited on theThe roof area was verified by ATC asbestos containing material via PLM testing (Attachment 3). . to final air sampling collection following as visibly clean (free of any visible dust and debris) prior removal and clean-up activities were abatement activities on October 5, 2001. All asbestos abatement contractor. performed by Hazardous Elimination Corp a NYS licensed asbestos (NIOSH 7400 Method) by ATC The samples were analyzed via Phase Contrast Microscopy immediately reported to the on- Environmental Laboratories, Inc. (ELAP #10879) and results were indicated that the work areas had site monitor when analysis was completed. These results cubic centimeter, which is the NYC achieved the required clearance standard of 0.01 fibers per following an abatement activity. Department of Environmental Protection re-occupancy criteriademobilized equipment and a final After these results were reported to the job-site, the contractor attached air monitoring data sheets clean up of the area was performed. Please see the (Attachment 3).

Ambient Air Sampling — Fiberglass

ATC Associates Inc. © 2002

NYC-WTC 000124057