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NYC-WTC_000226960
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NYC 9/11 Public Portal Document
104 East 25th St New York, New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES INC.
January 28, 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 Mercury Stuyvesant High School ATC Project No. 15-19125-0246
Dear Mr. Orlan:
ATC Associates, Inc. (ATC) is pleased to provide this letter report of air sampling for mercury . . conducted on January 17, 2002, at the referenced school. The New York City Board of Education (BOE) requested this sampling at the recommendation of H. A. Bader, a consultant to the parents’ association. 1 ATC collected three (3) samples for mercury vapor using Carulite® (Hydrar) tubes connected to battery-powered sampling pumps calibrated to collect 0.2 liters of air per minute. Two samples were collected indoors and one was collected on the roof. The samples were sent to PSC Analytical Services, Inc., an American Industrial Hygiene Association-accredited laboratory in Reading, PA. One blank tube was also subinitted. Analysis was performed by means of a mercury analyzer according to NIOSH Method 6009. A copy of the analytical report is attached.
Mercury (Hg) was found at a trace level in each of the three samples. It was also detected in the blank. The following table presents the mercury data by sample location.
TABLE 1 Airborne Mercury (Hg) Concentrations January 17,2002 I® IS■MM 0.029 96 0.000302 1 Floor Main Lobby 0.029 96 0.000302 2”^ floor bridge lobby 11^3 0.028 96 0.000292 Roof "5^4 0.028 Blank ■* Milligrams per cubic meter of air / Not blank corrected
CITY_21MC100_000490967 NYC-WTC_000226960
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NYC-WTC_000226960Source: NYC Law Department, mirrored locally
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