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NYC-WTC_000214934

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NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan May 22, 2002 Wipe Samples for Dioxins Page 2 P. S. 234 (Manhattan) ATC Project No. 15-19125-0279

DIOXIN WIPE SAMPLE RESULTS (2,3, 7, 8 TCDD EQUIVALENTS) April 16,2002 DIOXIN CONCENTRATION LOCATION/SAMPLE NUMBER (ng/m^j

1st Floor Hallway - east end/DXl 0.00010

1st Floor Hallway - west end/DX2 0.000023

April 23, 2002 DIOXIN CONCENTRATION LOCATION/SAMPLE NUMBER

ist Floor Hallway - east end/DXl 0.00011

1st Floor Hallway - west end/DX2 0.000098

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 nanograms per square meter (25 ng/m^).

On 4/16/02, the Dioxin concentrations on indoor surfaces were 0.006023 and 0.00010 ng/m^. On 4/23/02, the concentrations on indoor surfaces were 0.000098 and 0.00011 ng/m^. These levels are well below the NYSDOH guideline.

It is not possible to determine when the 2, 3, 7, 8 - TCDD equivalents detected in these samples were deposited. Dioxin wipe samples were not collected from this school prior to December 6, 2001.

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, J TC ASSOCIA TES INC. Reviewed £y:

James R. Cohn, CIH, CSP Senior Pr^ect Manager Regional Manager Industrial Hygiene Division

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CITY_21MC100_002871356

NYC-WTC_000214935

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NYC-WTC_000214935Source: NYC Law Department, mirrored locally

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