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Metals air sampling report, M833 school, June 2002

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Report of air sampling for metals conducted at the referenced school on June 22, 2002.

NYC-WTC_000180110–000180111
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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.

July 10, 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 of Economics and Finance (M833) ATC Project No. 15-19125-0291

Dear Mr, Orlan;

ATC Associates, Inc. (ATC) is pleased to provide this report of air sampling for metals conducted on June 22, 2002 at the referenced school. The New York City Board of Education (BOE) requested this sampling to ensure that acceptable air quality is being maintained.

Scone of Work

On each day, ATC collected four (4) samples for metals from locations thropghout the building and outdoors. Samples were collected for ten (10) hours 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. Three (3) samples were collected inside the building and one (1) was collected outdoors on the roof. Two (2) blank samples were also submitted per 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. The samples collected on each day were analyzed for a panel of twelve (12) metals. The metals were aluminum (Al), cadmium (Cd), chromium (Cr), cobalt (Co), copper (Cu), iron (Fe), magnesium (Mg), manganese (Mn), molybdenum (Mo), nickel (Ni), zinc (Zn) and lead (Pb). Copies of the analytical laboratory reports are attached.

The sampling locations were: the Main Lobby, the 5''’ floor by Stair B, the 9* floor by Stair B and the Roof.

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

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.

CONFIDENTIAL, CITY_21MC100_003463182 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180110

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NYC-WTC_000180110Source: NYC Law Department, mirrored locally

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