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NYC-WTC_000226944
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NYC 9/11 Public Portal Document
104 East 25th St.. 10th Floor New York. New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES INC.
April 5, 2002
Mr. Bernard P. Orlan Director, Enviromnental Health & Safety New York City Board of Education 28-11 Queens Plaza North Long Island City, NY 11101-4008
Re: Wipe Samples for Dioxins Stuyvesant High School (M477) ATC Project No. 15-19125-0246
Dear Mr. Ori an:
ATC Associates Inc. (ATC) is pleased to provide this report of the results of the wipe-samples for polychlorinated dibenzo-p-dioxins (PCDDs)and dibenzofurans (PCDFs) collected on March 1, 2002, at the referenced location. The New York City Board of Education (BOE) requested these samples to evaluate possible contamination in the school building per the recommendation of H. A. Bader, consultant to the parents association.
Scope of Work
The samples were collected using gauze pads and hexane as a solvent. The solvent was 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.
Wagdi Abdelshahid, Industrial Hygienist of ATC’s New York City office, collected the samples 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. .
Results
ATC submitted three wipe samples for PCDDs/PCDFs (plus one blank) to Pace for analysis. Samples were taken from areas specified by the parents association consultant. The sample area for each sample was one square meter (1 m2). The areas sampled were:
• 1st floor main lobby wall; • 2nd floor bridge entrance wall; • H VAC unit ff 11.
CITY_21MC100_002896385
NYC-WTC_000226944
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NYC-WTC_000226944Source: NYC Law Department, mirrored locally
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