NYC-WTC_000202284

NYC 9/11 Public Portal Document

(SWTC 7\ 7iYb4 East 25th St New York, New York 10010 www.atc-enviro.com / ^12.353:8280 Fax 212.353.8306 A S S 0 Cl AT E S IN C.

January 28, 2002 N7Y.C. - Board of Education 7 28,- 11 Queens Pl az ar North r 14584-0819 Long Island' City, NY 111017

Attn: Mr.Bernard/Orlan

Re; Report of TEM' Analysis Dear ,Mr. Orlan: < 7

Following are the results of transmission electron, micrGscopy CTEM) analysis- of air samples from our Group No. 6478: Project Name: P.S.89M, 201 Warren Street, NY, NY Location: Playground, Roof/ lst_ Floor Hallway Samples received: 01/27/02

These results will confirm and document, the data transmitted today to Mr. Andreas Andreou, Project Manager, of 7oUr office. The analyses were performed in strict conformance with7the methodology of the AHERA Final Rule (4 0 CFR Part 7 63, 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. i ii ' . - 7 7 :

Copies of the bench sheets are also included as stipulated by AHERA. MMI TEM cassettes, Lot No. 00263916, were used. / 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 hot without prior 7- permission of this laboratory. - If post-abatement inside samples pass, the response action may be considered to have been completed. The analyses were supervised by Dr. Michael A. Gorycki, Director of Electron Microscopy.

We are pleased to note that our7 TEM lab has received full accreditation from NVLAP, as is currently required for recognized analysis of TEM air samples for AHERA proj ects, and also approval under the NY State DOH ELAP program. These analyses were performed 7 by ATC id/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

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NYC-WTC_000202284