NYC-WTC_000231403

NYC 9/11 Public Portal Document t£tc=rtlcatc»ra?.-?«’ -'

104 East 25th Street New York. New York taOlO WWAV 31C' env;ro .com

Wi associates INC. 212.353 0280 Fax 212.353.8306

October a, 2001 AuC Environmental 115 W. 30th Street New York, NY lOOOl Attn: Mr, Joshua Ssreac Re: Report of TSM Analysis Dear Mr, Sareth : Following are the results of transmission electron microscopy (TEW) analysis of an air sample from our Group No. 5640. Client: Lefrak Organization Project Name: Bldg, 400 location: Apartment lOU Sample received: 10/09/0i

These results will confirm and document the data transmitted today to you. The analyses were performed in strict conformance with the methodology of the AHERA Final Rula (CFR October 30, 1987} for clearance of abatement sites. As indicated on ths attached Summary Results sheet, no asbestos structures were detected in the single inside sample submitted from the .=3ite. Results reported as Strucc/cc are a function of air volums r collected in the field and are, as such, not verifiable by this h laboratory. This report may be reproduced only in its entirety and ’ not without prior permission of this laboratory. If the post- abatement inside samples pass, the response action may be considered to have been completed. The analyses were supervised by [ Dr, Michael A. Gorycki, Director of Electron Microscopy, We are pleased to note that our temi lab has received full acjCT-editation from MVLAP, as is currently required for racognited analysis of TEM air samples for AHERA projects, and also approval under the NY State DCH ELA? program. These analyses were performed by ATC d/b/a ATC Associates Inc. Please contact me regarding any questions relating to these materials.

Very r.r-ly yours, / ’t

Michael A. Gorycki, Ph.D. Director of Electron Microscopy

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