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NYC-WTC_000202147
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NYC 9/11 Public Portal Document
(Swe 104 East 25th Street 10th FL New York, New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306 S S O C I A T E S INC.
September 30, 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
Re: Respirable Dust Sampling P.S. 89M ATC Project No. 15-19125-0297
Dear Mr. Orlan:
ATC Associates Inc. (ATC) is pleased to provide this report of respirable particulate sampling conducted on September 23-24, 2002, in the referenced school building. The New York City Department of Education (DOE) requested this sampling to verify that acceptable indoor air quality is being maintained. '
SCOPE OF WORK
ATC conducted this evaluation to assess the concentration of respirable particulates (PMj 5) within the building.
ATC collected one sample of PM2.5 for gravimetric analysis for 24 hours using a Micro Environmental Monitor® (MEM®), manufactured by SKC, Inc. The gravimetric sample was collected on a pre-weighed PVC filter supplied and analyzed by PSC Analytical Services, Inc., an American Industrial Hygiene Association-accredited laboratory in Reading, PA.
Tenzin Namgyal, Industrial Hygienist of ATC’s New York City office, conducted the sampling consistent with generally accepted indoor air quality assessment practices. The results of the sampling represent conditions found on the date the sample was collected.
EVALUATION CRITERIA
Currently, there are no regulatory standards for indoor air quality in non-industrial buildings, such as offices and schools.
CITY_21MC100_005390599
NYC-WTC_000202147
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NYC-WTC_000202147Source: NYC Law Department, mirrored locally
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Letter and report detailing respirable particulate sampling conducted to assess indoor air quality.
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