Air sampling report for metals at School for Leadership, April

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104 East 25th St., 10th Floor New York, New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES INC.

April 26, 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 High School for Leadership & Public Service (M894) ATC Project No. 15-19125-0290

Dear Mr. Orlan:

ATC Associates, Inc. (ATC) is pleased to provide this letter report of air sampling for metals conducted on Ivlarch 15, 22 and 29, 2002, at the referenced school. The New York City Board of Education (BOE) requested these samples to determine if acceptable air quality is being maintained.

Scope of Work

On each day, ATC collected four (4) samples for metals in air. Samples were collected for ten (10) hours. Th’ee (3) samples were collected inside the building and one (1) was collected outdoors. One blank filter per day was also submitted. The samples were sent to PSC Analytical Serv’ices, Inc., an American Industrial Hygiene Association-accredited laboratory in Reading, PA. A copy of the analytical laboratory report is attached.

The samples were collected using 37 mm mixed cellulose ester filters connected to battery- powered sampling pumps at a flow rate of 2 liters per minute. Pumps were calibrated before and after each sampling period. Analysis was performed by NIOSH Methods 7300M. Each sample was analyzed for a panel of twelve (12) metals. The metals were aluminum (Al), cadmium (Cd), chromium (Cr), cobalt (Co), copper (Cu), iron (Fe), lead (Pb), magnesium (Mg), manganese (Mn), molybdenum (Mo), nickel (Ni) and zinc (Zn). A copy of the analytical report is attached.

Tenzin Namgyal and Wagdi Abdelshahid, Industrial Hygienists from ATC’s New York City office, conducted the sampling consistent with accepted industrial hygiene practices. The results represent conditions on the day the samples were collected.

The locations ot' the samples were the Roof by air intake, 1“ floor Main Lobby, 5“’ floor Hallway near the elevator and the 10* floor Hallway near the elevator.

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 materials in indoor air in non-industrial situations.

CONFIDENTIAL, CITY_21MC100_003431693 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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