ATC Associates report on wipe samples for polychlorinated dibenzo-p-dioxins and dibenzofurans collected at a school on March 8, 2002.
NYC-WTC_000175058–000175059
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
104 East 25th St.. 10th Floor New York. New York 1001C www.atc-enviro.corr 212.353.828C Fax 212.353.830e ASSOCIATES INC.
April 17, 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 March 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:
• 1 st floor main lobby wall; • 2'^^ floor bridge entrance wall; • HVAC Unit # I.
CONFIDENTIAL, CITY_21MC1OO_OO34296O7 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000175058
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12 shared non-person entities · 1 shared topics · similarity 0.998
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11 shared non-person entities · 1 shared topics · similarity 0.998
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Laboratory report detailing polychlorinated dibenzo-p-dioxins and furans (PCDDs/PCDFs) wipe sample analysis from a New York City Board of Education school collected in May 2002.
11 shared non-person entities · 1 shared topics · similarity 0.997
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Similarity score 0.999 (not a probability)
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