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PCDD/PCDF wipe sample results, May 22, 2002

Machine-extracted title · confidence 95%

Laboratory report providing results for polychlorinated dibenzo-p-dioxins and dibenzofurans from school wipe samples.

NYC-WTC_000175602–000175603
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NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan ■ May 22, 2002 Wipe Samples for Dioxins Page 2 H. S. for Leadership & Public Service (894Mi ATC ProiectNo. 15-19125-0290

This provides a single value (in nanograms) for the analytical results for each sample. The sample locations and the results are shown in the table.

DIOXIN WIPE SAMPLE RESULTS (2, 3, 7, 8 TCDD EQLTVALENTS) April 19, 2002 DIOXLN CONCENTRATION LOCATION7SAMPLE NUMBER (ng/m^) pt Floor Mam Lobby - Floor /DXl 0.000059 5th Floor Hall by Elevator - Floor /DX2 0.000097 Tot^^oor Hall by Elevator - Floor /DX3 0.00028

April 26, 2002 DIOXIN CONCENTRATION LOCATrONZSAMPLE NUMBER (ng/m2) ist Floor Main Lobby - Floor /DXl 0.0074 5 th Floor Hall by Elevator - Floor /DX2 0.00071 10th Floor Hall by Elevator - Floor /DX3 0.00075

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 nanogram.s per square meter (25 ng/m^).

On 4/19/02, the concentrations on indoor surfaces ranged from 0.000059 to 0.00028 nanograms per square meter (ng/m^). On 4/26/02, the concentrations on indoor surfaces ranged from O.QOO75 to 0.0074 nanograms per square meter (ng/m2). The levels found in all of these samples are below the TYSDOH guideline of 25 ng/m^.

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

Reviewi

el Java/ / James R. Cohn, CIH, CSP Senior Profi^t Manager Regional Manager Industrial Hygiene Division

Attachment

CONFIDENTIAL, CITY_21MC100_003431927 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175603

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NYC-WTC_000175603Source: NYC Law Department, mirrored locally

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