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Air sampling letter report for metals, Jan 2002
Machine-extracted title · confidence 95%Letter report from ATC Associates regarding air sampling for metals in airborne dust at a school conducted December 2001.
NYC-WTC_000175034–000175035Page image
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NYC 9/11 Public Portal Document
104 East 25th Street 10th Floor New York, New York 10010-2917 212.353.8280 ASSOCIATES INC. Fax 212.353.8306
January 7, 2002
Mr. Bernard P. Orlan Director, Environmental Health and Safety New York City Board of Education 28-11 Queens Plaza North Long Island City, NY 11101
Re: Air Sampling for Metals Stuyvesant High School 345 Chambers St. New York, New York ATC Project No. 15-19125-0246
Dear Mr. Orlan:
ATC Associates, Inc. (ATC) is pleased to provide this letter report of air sampling for metals in airborne dust on December 20 and 26, 2001, at the referenced school. The New York City Board of Education (BOE) requested this sampling at the recommendation of H. A. Bader, a consultant retained by the parents association.
On each day, ATC collected three (3) samples for metals at specified locations. Samples were collected for a minimum of seven (7) hours using 37 mm mixed cellulose ester filter connected to battery-powered sampling pumps at a flow rate of 2 liters per minute. Pumps were calibrated before and after each sampling period. Two (2) samples were collected inside the building and one (1) was collected on the roof. One blank sample was also submitted on each day. The samples were sent to PSC Analytical Services, Inc., an American Industrial Hygiene Association- accredited laboratory in Reading, PA. Analysis was performed by NIOSH Methods 7300M. Each sample was analyzed for a panel of eleven (11) metals. The metals were aluminum (Al), cadmium (Cd), chromium (Cr), cobalt (Co), copper (Cu), iron (Fe), magnesium (Mg), manganese (Mn), molybdenum (Mo), nickel (Ni) and zinc (Zn). Copies of the analytical reports are attached.
The sampling locations, specified by the parents association consultant, were as follows: • D'floor lobby; • 2"'^ floor bridge entrance hallway; • Roof.
The established regulatory values for metals are intended for industrial workplace exposures and are not generally applicable to office/school settings. There are no standards for these metals in indoor air in non-industrial situations.
None of the metals in the analytical panel were present at levels above the limits of detection.
CONFIDENTIAL, CITY_21MC100_003429277 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000175034
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NYC-WTC_000175034Source: NYC Law Department, mirrored locally
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