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NYC-WTC_000206629

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NYC 9/11 Public Portal Document

104 East 25th St., 10th Floor J▲ New York, New York 10010 www.atC'enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES INC.

June 29, 2002

Warren & Panzer Engineers, P.C. 228 E. 45th Street New York, NY 10017

Attn: Mr. Fabio Pedone

Re: Report of TEM Analysis

Dear Mr. Pedone:

Following are the results of transmission electron microscopy (TEM) analysis of air samples from our Group No. 8323.

Client: NYCDEP Address: 30 W. Bway., NY, NY Location: Roof #2, 15th Floor (BMCC) Samples received: 06/28/02

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

The results of the sample analyses are as indicated 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.

The analyses were supervised by Dr. Michael A. Gorycki, Director of Electron Microscopy.

We are pleased to note that our TEM lab has received full accreditation from NVLAP and also approval under the NY State DOH ELAP program, as is currently required for recognized analysis of TEM air samples for 7\HERA projects. These analyses were performed by ATG 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_002994039

NYC-WTC_000206629

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NYC-WTC_000206629Source: NYC Law Department, mirrored locally

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