ATC Associates report on dioxin wipe samples collected at P.S. 89M on December 20, 2001.
NYC-WTC_000177716–000177718
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document
104 East 25th Street New York, New York 10010 www.atc-enviro.corn 212.353.8280 Fax 212.353.8306 ASSOCIATES INC.
January 10, 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 P. S. 89M ATC Project No. 15-19125-0297
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 December 20, 2001, 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 Environ Corp., consultant to the parents association..
SCOPE OF WORK
Wagdi Abdelshahid, Industrial Hygienist of ATC’s New York City office, collected the samples on all three days.
The samples were collected using gauze pads and hexane as a solvent. The pads and solvent were 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.
The sampling was performed 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.
SUBSTANCE DESCRIPTION
“Dioxins” or “dioxin” is a name used for a group of chlorinated multi-ringed organic compounds that includes polychlorinated dibenzo dioxins (PCDDs) and polychlorinated dibenzo furan.s (PCDFs). They are related to polychlorinated biphenyls (PCBs). PCDDs and PCDFs are not produced commercially except for research purposes. They occur as trace level by-products of combustion and industrial chemical processes.
CONFIDENTIAL, CITY_21MC100_003474137 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000177716
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NYC-WTC_000177811
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on January 22, 2002.
12 shared non-person entities · 1 shared topics · similarity 0.987
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000177806
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on January 29, 2002.
12 shared non-person entities · 1 shared topics · similarity 0.987
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.986
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000177801
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on February 5, 2002.
11 shared non-person entities · 1 shared topics · similarity 0.986
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.986
machine-extracted · confidence unavailable · Check page ↗12 shared non-person entities · 1 shared topics · similarity 0.986
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machine-extracted · confidence unavailable · Check page ↗11 shared non-person entities · 1 shared topics · similarity 0.985
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machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000174801
Laboratory report providing results of wipe samples for dioxins and furans collected at PS 89M in December 2001.
13 shared non-person entities · 1 shared topics · similarity 0.996
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NYC-WTC_000174801
Laboratory report providing results of wipe samples for dioxins and furans collected at PS 89M in December 2001.
Similarity score 1.000 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.999 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.998 (not a probability)
machine-extracted · confidence unavailable · Check page ↗NYC-WTC_000177806
Cover letter and results for wipe samples testing polychlorinated dibenzo-p-dioxins and dibenzofurans collected at PS 234M on January 29, 2002.
Similarity score 0.998 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.997 (not a probability)
machine-extracted · confidence unavailable · Check page ↗Similarity score 0.997 (not a probability)
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Laboratory report providing results of wipe samples for dioxins and furans collected at PS 89M in December 2001.
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