Asbestos TEM report cover letter, 125 Liberty St, Sep 2002

NYC 9/11 Public Portal Document

104 East 25th St. 10th F

CWTC ASSOCIATES INC. New York, New York 10010 www.atc-eriviro.corr) 212 353,8280 Fax 212.353 830()

September 29, 200 ATC Associates Inc. 104 East 25th Street New York, NY 10010

Attn: Mr. Ben Sallemi

Re: Report of TEM Analysis

Dear Mr. Sallemi;

Following are the results of transmission electron m.icroscopy ITEM) analysis of air samples from our Group No. 8913:

Client: D.E.P. Project Name: D.E.F. Clean-up, 125 Cedar St., NY, NY Location: Around Building Samples received: 09/28/02

These results will confirm and document the data transmitted today to your office. The analyses were performed in strict conformance with the methodology of the AHERA Final Rule (CFR October 30, 1987) for clearance of abatement sites.

The results of the sample analyses may be found on the attached document.

Results reported as Struct/cc are a function of air volume collected in the field and are, as such, not verifiable by this laboratory. This report may be reproduced only in its entirety and not without prior permission of this laboratory.

We are pleased to note that our TEM lab has received full accreditation from NVLAP, as 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,

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

CITY_21MC100_009369170 NYC-WTC_000181815