NYC-WTC_000202484

NYC 9/11 Public Portal Document

104 East 25th St, 10th Floor New York, New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES INC. i;

December 23, 2002 ij N.Y.C. Board of Education 28-11 Queens Plata North Long Island Cit^ / NY 11101 I

Attn: Mr. Bernard Orlan 1

Re: Report of TEM Analysis

Dear Mr. Orlan:

Following are the results of transmission electron microscopy (TRM) analysis of air sample-' from our Group No. 9204:

Project Name: P.S. 214M, 292 Greenwich St., NY, NY D Location: Entire School Samples received: 12/23/02

These results will confirm and document the data transmitted today to Mr. Yiannis Eistathiou, Project Manager, of our office. The analyses were performed in conformance with the methodology of the AHERA Final Rui'/ 140 CPR Part 763, Appendix A to Subpart, E, October 30, 1987) for clearance of abatement sites.

The results of the sample analyses are as indicated on the attached document.

Copies of the bench sheets are also included as stipulated by AHERA. 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. If post-abatement inside samples pass, the response action may be considered to have been completed.

We are pleased t c note that our TEM lab has received full accreditation fror NVLAP, as is currently required for recognized analysis of TEM air samples for AHERA projects, and also approval under the NY Stale DOH ELAP program. These analyses were performed by ATC d/b/a AT.' Associates Inc. Please contact me regarding any questions relating to these materials.

Very truly ycv is,

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

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NYC-\/VTC_000202484