NYC-WTC_000211379

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan May 13, 2002 Wipe Samples for Dioxins Page 2 P. S. 89 (Manhattan) ATC Project No. 15-19125-0297

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 EQUIVALENTS)

April 4, 2002

1st Floor Hallway-north/DXl 1 st Floor Hallway-south/DX2 0.00067 2nd Floor Hallway-south/DX3 0.00052

April 11,2002

isi Floor Hallway-north/DXl 1®^ Floor Hallway-south/DX2 0.00079 2*^^^ Floor Hallway-south/DX.3 0.0021

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 4/4/02, the concentrations on indoor surfaces ranged from 0.000044 to 0.00067 nanograms per square meter (ng/m^). On 4/11/02, the concentrations on indoor surfaces ranged from 0.00079 to 0.0021 nanograms per square meter (ng/m2). The dioxin concentrations in all of these sample are 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 samples were not collected from these locations prior to December 20, 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, 4 TC ASSOCIA TES JNC. Reviewed By: I

James R. Cohn, CIH, CSP Senior Prefect Manager Regional Manager Industrial Hygiene Division

Attachment

CITY_21MC100_0 02864192

NYC-WTC_000211380