NYC-WTC_000212560

NYC 9/11 Public Portal Document

cgwrc ASSOCIitTES INC. 104 East 25th St, 10th Flooi New Yell , New Yoik 10010 mvwatc-ettviro cotr 212 353.8280 Fax 212 353.8306

'4ay 15, 2002 g . Y . C . Boeo'd of Education 28-11 Queens Plaza North 14184-0823 Long Island City, NY 11101

Attn; Mr. Bernard Orlan

Re: Report of TEM Analysis

Dear Mr. OrIan:

Following are the results of transmission electron microscopy sTEM; analysis of air samples from our Group No. 7742;

Project Name: P.S. 234M, 292 Greenwich Street, NY, NY ._ocatcon: Entire Building Samples received; 05/14,/02

These results will confirm and document the data transmitted today to Mr. Maik Terjesen, Project Manager, of our office. The analyses were performed in strict conformance with the methodology of the AHERA Final Rule (40 CFR Part 763, Appendix A to Subpart E, October 30, 1987) for clearance of abatement sites.

Tlie result £1 of the sample analyses are as indicated on the attaciiea document.

Copie.s of the bench sheets are also included as stipulaced 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. The analyses were supervised by Dr. Michael A. Gorycki, Director of Electron Microscopy.

We are pleased to note that our TEM lab has received f u 11. ac cr^_ita.Lion from. NVLAP, as is currently required for recognized analysis of TEM air samples for AHERA project.s, and also approval under the NY State DOH ELAP program. These analyses were performed by ATC d/o/a ATC Associates Inc. Please contact me regarding any questions relating to these materials.

Very truly yours. 1

Michae.l A. Gorycki, Ph.D. Director of Electron Microscopy

CITY_21MC100_002867141

NYC-WTC_000212560