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NYC-WTC_000197424

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NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan July 1,2002 Wipe Samples for Dioxins Page? H. S. of Economics & Finance (M833) ATC Proiect No. 15-19125-0291

DIOXIN WIPE SAMPLE RESULTS (2,3,7,8 TCDD EQUIVALENTS) - Nanograms per square meter (ng/m^)

Main Lobby/DXl 0.00019 5th Floor Hall by Stair B/DX2 0.000022 9th Floor by Stair B/DX3 0,00020

The New York State Department of Health (NYSDOH) established guidelines for dioxin for the re-occupancy of the Binghamton State Office Building following a PCB fire. The NYSDOH guideline for dioxin on surfaces is 25 ng/rr.2.

The concentrations on indoor surfaces ranged from 0.000022 ng/m^ to 0.00020 ng/m^. The levels found in these samples are below the NYSDOH guideline of 25 ng/m^.

It is not possible to determine when the 2, 3, 7, 8 - TCDD equivalents detected in these samples were deposited. Dioxin samples were not collected from this school prior to January 14, 2002.

It is our pleasure to provide these indoor environmental services to the NYC Board of Education. If you have any questions about this report, please call (212) 353-8280, extension 212.

Sincerely, A TC ASSOCIA TES INC.

Reviewed by: I

/Yiannis Efstatblou James R. Cohn, CIH, CSP Senior project Manager Regional Manager Industrial Hygiene Division

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NYC-WTC_000197425

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NYC-WTC_000197425Source: NYC Law Department, mirrored locally

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