OCR status: ok · source: pdftotext
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.
November 25, 2002
Mr. Bernard P. Orlan Director, Environmental Health & Safety New York City Department of Education i 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 September 6, 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 wure 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.
Tenzin Namgyal, 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 to Pace for analysis. Samples were taken from areas specified by the parents association consultant. The sample area for each sample was 'I one square meter (1 m^). The areas sampled were;
• 1 st floor main lobby wall; • 2nd floor bridge entrance lobby; • HVACUnit#.2.
Each sample was analyzed for sixteen (16) PCDD/PCDF isomers. The results for each isomer were then converted to 2, 3, 7, 8 tetrachloro-dibenzo-p-dioxin (2, 3, 7, 8-TCDD) equivalents by multiplying by an established equivalency factor. This provides a single value (in nanograms)
] -1 .---------------- 1"-^l ■ 1
Cn-:[_21MC10Q_003 273 0 45
NYC-WTC_000202498
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NYC-WTC_000175719
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.
10 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗10 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗10 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗10 shared non-person entities · 1 shared topics · similarity 0.996
machine-extracted · confidence unavailable · Check page ↗10 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175694
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 March 2002.
10 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175723
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.
10 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175056
ATC Associates report on wipe samples for polychlorinated dibenzo-p-dioxins and dibenzofurans collected at a school on March 1, 2002.
10 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗10 shared non-person entities · 1 shared topics · similarity 0.995
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175721
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 March 2002.
10 shared non-person entities · 1 shared topics · similarity 0.994
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175058
ATC Associates report on wipe samples for polychlorinated dibenzo-p-dioxins and dibenzofurans collected at a school on March 8, 2002.
10 shared non-person entities · 1 shared topics · similarity 0.994
machine-extracted · confidence unavailable · Check page ↗10 shared non-person entities · 1 shared topics · similarity 0.993
machine-extracted · confidence unavailable · Check page ↗No available related records indexed in this group.
Similar subjects in other documents. Similarity does not establish the same event, measurement or conclusion.
NYC-WTC_000175719
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.
Similarity score 0.997 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.997 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175721
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 March 2002.
Similarity score 0.997 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175716
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 April 2002.
Similarity score 0.997 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000175723
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.
Similarity score 0.997 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.997 (not a probability)
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NYC-WTC_000175719
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.
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