NYC 9/11 Public Portal Document
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ASSOCIATES INC
March 21, 2002
Mr Bernard P Orlan
Director, Environmental Health & Safety
New York City Board of Education
28-11 Queens Plaza North
Long Island City, NY 11101 -4008
Re: Wipe Samples for Dioxins
High School for Leadership and Public Service (894M)
ATC Project No. 15-19125-0290
Dear Mr. Orlan
ATC Associates Inc (ATC) is pleased to provide this report of the results of the wipe samples
for polychlorinated dibenzo-p-dioxms (PCDDs)and dibenzofurans (PCDFs) collected on
February 22, 2002, at the referenced location The New York City Board of Education (BOE)
requested these samples to evaluate possible contamination in the school building
SCOPE OF WORK
Wagdi Abdelshahid, Industrial Hygienist of ATC’s New York City office, collected the samples
on all three days
The samples were collected using gauze pads and hexane as a solvent The pads and solvent
were provided and samples were analyzed by Pace Analytical Services, Inc (Pace) of
Minneapolis, MN, a laboratory experienced in dioxin analysis The analysis was performed by
modified EPA Method 8290 using combined capillary column gas chromatography/high
resolution mass spectrometry
The sampling was performed consistent with generally accepted industrial hygiene practices
There were inherent limitations created by constraints of time, operational and work practice
variability, variations in contaminant concentrations, and sampling and analytical accuracy. The
results of the sampling represent conditions found on the dates the samples were collected
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^)
CONFIDENTIAL, CITY_21MC100_003459596
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000179461
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