NYC-WTC_000179312

NYC 9/11 Public Portal Document

ITC 104 East 25th Street 10th FL New York, New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES INC.

October 29, 2001

Mr. Bernard P. Orlan New York City Board of Education 28-11 Queens Plaza North Long Island City, NY 11101

Re: Limited settled dust sampling for fiberglass at Stuyvesant HS (M477)

Deal- Mr. Orlan;

At your request, ATC Associates, Inc. representative Mr. Yiaimis Efstathiou visited Stuyvesant HS (M477) located at 345 Chambers Street, New York, NY 10007 on October 24"', 2001. The purpose of the site visit was to perform a settled dust sampling to be analyzed for fiberglass content on areas indicated in H.A. BADER Consultants, Inc. letter to Stuyvesant HS parents dated October 10. 2001. These areas are the following:

1 ’* and 2''^' floors lobby North, East and South exit vestibules Roof Classrooms with unit ventilators on the North, East and South side of the building Two hallway areas 1 floor swimming pool area 3"' floor gymnasium area 5"' floor cafeteria area Auditorium area

The purposed of the dust sampling is to determine if settled dust in the school contains fiberglass fibers. ATC will be repeating this sampling every Wednesday as per the recommendation of H.A. BADER Consultants, Inc. and after the approval of NYC-BOE. This is the second week such a sampling is performed in Stuyvesant HS.

As per your request, a total of fifteen (15) settled dust samples, utilizing the Scotch Magic Tape - An Aid to the Microscopist for Dust Examination method by Gai-y Nichols, were collected from the aforementioned areas and were analyzed utilizing Polarized Light Microscopy (PLM). This method produces qualitative results only-

Analytical results indicated that none of the fifteen (15) collected settled dust samples contain fiberglass fibers.

CONFIDENTIAL, CITY_21MC100_011532982 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179312