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NYC-WTC_000229444
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NYC 9/11 Public Portal Document
104 East 25th St., 10th Floc New York, New York 1001 www.atc-envirQ.cor 212.353.828 Fax 212 353.830 ASSOCIATES INC.
June 7, 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 Stuyvesant High School (M477) ATC Project No. 15-19125-0246
Dear Mr. Orlan;
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 May 8, 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 m^). The areas sampled were:
• I st floor main lobby wall; • 2nd floor bridge entrance lobby; • HVAC Unit # II.
CITY_21MC100_003797524
NYC-WTC_000229444
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NYC-WTC_000229444Source: NYC Law Department, mirrored locally
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