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NYC-WTC_000175331
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NYC 9/11 Public Portal Document
104 East 25th St, 10th Floor New York, New York 10010 www.atc-enviro.corh 212.353.8280 Fax 212.353.8306 ASSOCIATES INC.
November 25, 2002
Mr. Bernard P. Orlan Director, Environmental Health & Safety New York City Department of Education 28-11 Queens Plaza North Long Island City, NY 11101 -4008
Re: Wipe Samples for Dioxins Murray Bergtraum High School (M520) ATC Project No. 15-19125-0351
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 September 11, 2002, at the referenced location. The New York City Department of Education (DOE) requested these samples to evaluate possible contamination in the school building.
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.
Sonny Ramlal, Environmental Technician 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 date the samples were collected.
Results
ATC submitted three wipe samples for PCDDs/PCDFs (plus one blank) to Pace for analysis. Samples were taken from representative floor areas throughout the building. The sample area for each sample was one square meter (1 m^). The areas sampled were:
• Main Lobby; • 3’’^ Floor Hallway; • 5th Floor Hallway.
CONFIDENTIAL, CITY_21MC100_003422214 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000175331
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NYC-WTC_000175331Source: NYC Law Department, mirrored locally
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Memo reporting results of wipe samples for polychlorinated dibenzo-p-dioxins and dibenzofurans collected at P.S. 126M on August 29, 2002.
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Laboratory report providing results for polychlorinated dibenzo-p-dioxins and dibenzofurans from school wipe samples.
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