Mercury vapor sampling report at School for Leadership, February 2002

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104 East 25th St New York. New York 10010 wwvt'.atc-enviro.com 212.353,8280 Fax 212.353,8306 ASSOCIATES INC.

February 27, 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 Samples for Mercury Vapor High School for Leadership and Public Service (894M) ATC Project No. 15-19125-0290

Dear Mr. Orlan:

ATC Associates, Inc. (ATC) is pleased to provide this letter report of air sampling for mercury vapor collected on February 22, 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

ATC collected four (4) samples for mercury vapor. Samples were collected using Carulite® (Hydrar) tubes connected to battery-powered sampling pumps calibrated to collect 0.2 liters of air per minute. Samples were collected for a minimum of two (2) hours. Three (3) samples were collected inside the building and one (1) was collected outside.. One blank sample was also submitted. The samples were sent to PSC Analytical Sendees, Inc., an American Industrial Hygiene Association-accredited laboratory in Reading, PA, Analysis was performed by means of a mercury analyzer according to NIOSH Method 6009. A copy of the analytical report is provided in the attachment. The results indicate conditions on the date the samples were collected.

Tenzin \amgyal and Wagdi Abdelshahid, Industrial Hygienists from ATC’s New York City office, conducted the sampling.

The locations of the samples were: floor Main Lobby, 5* floor Hallway by the Elevator, 10th floor Hallway by the Elevator and the Roof.

Results

The established regulatory value for mercury (O.lmg/m^) is intended for industrial workplace exposures and is not generally applicable to office/school settings. There are no standards for mercury in indoor air in non-industrial situations. The EPA has no ambient air standard for mercury.

CONFIDENTIAL, CITY_21MC100_003431718 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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