Environmental assessment report cover, 375 South End Ave, Nov 2001

NYC 9/11 Public Portal Document 104 East 25th Street New York New York 10010 wea. atc-enwiro.com 212.383.8280 Fax 212353.8306 ASSOCIATES ING October 9, 2001 oo ALC Environmental 115 W. 30th Street , New York, NY 10001 Attn: Mr. Joshua Sarett Re: Report of TEM Analysis Dear Mr. Sarett: Following are the results of transmission electron microscopy (TEM) j analysis of air samples from our Group No. S641 Client: Lefrak Organization Project Name: Bldg. 400 Location: Various Sites Samples received: 10/09/02 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 Pinal Rule (CFR October 30, 1987) for Clearance of abatement sites. As indicated on the attached Summary Results sheet, less than 70 asbestos structures per mm was detected in all of the twenty-nine samples submitted from the site. Results xeported as Struct/cc are a function of air volume : gollected in the field and are, as such, not verifiable by this f laboratory. This report may be reproduced only in its entirety and Rot without prior permission of this laboratory. if the post- abatement inside samples pass, the response action may be i 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 Tam lab has received full accreditation from NVLAP, aa is currently required for recognized analysis of TEM air samples for AHERA projects, and also approval Under the NY State DOH ELAP program. These analyses were performed by ATC d/b/a ATC Associates Inc Please contact me regarding any questions relating to these Materials. | Very truly yours, id fv bellE ses cle i Michael A. Gorycki, Ph.D. | Director of Electron Microscopy i] | | NYC-WTC_000117505