NYC-WTC_000231403

NYC 9/11 Public Portal Document

104 Eas: 25th Street 1 New York. New York 10010 WWW. ate- enviro.com 212,3330200 Fax 212.353,3306 associates »NC.

October 9, 2001 ALC Environmental. ^’•115 W- 30t:h Street I'tiew York, NY lOOOi ; Attn: Mr, Joshua Sarett Re: Report of TEM Analysis rDear Mr- Saretc: I FoLlowitig are the results of tranamission electron microscopy (TSK) Lanalysis of air samples from our Group No, 5641. I Client J Lefrak Organisation IfcProject Name-, Bldg. 400 rLocation: Various Sitee t £a:nplee received; 10/09/01 [These results will confirm and document the data transmitted today ’ to you. The analyses were performed in strict conformance with the Hethodology of the AKEBA Final Rule (C?R October 30, ISSt) for [clearance of abatement sites. As indicated on the attached Summary EResults sheet, less than 70 asbestos structures per mm’ was detected ? in all of the twenty-nine samples submitted from the site. I Results reportsd as Struc.c/cc are a function of air volume I collected in the field and are, as such, not verifiable by this •fS ^laboratory. This report may be reproduced only in its entirety and I not without prior permission of this laboratory. If the post- I abatement inside samples pass, tha response action may be si considered to have been completed. The analyses were supervised by ?Dr. Michael A. Gorycki, Director of Electron Microscopy. i:.

s:We are pleased to note that our TEM lab has received full. jJ accredit at ion from NVLAP, ae is currently reejuired for recognized !r analysis of TEM air samples for AHERA projects, and also approval Iunder the NY State DOH ELAP program. These analyses were performed Ti ?by Arc d/b/a ATC Associates Inc, please contact me regarding any qusstions relating co these h/ ^Materials.

Very truly yours. h ^Michael A. Gorycki, Ph-D, [Director of Electron Microscopy |.; I

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