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Mercury vapor air sampling report, PS 131M, Aug 2002

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Laboratory report from ATC Associates detailing mercury vapor air sampling results at PS 131M conducted on August 22, 2002.

NYC-WTC_000175454–000175455
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NYC 9/11 Public Portal Document

104 East 25th St 10th Fl JA New York New York 10010 WWW ate enviro com 212 353 8280 Fax 212 353 8306 ASSOCIATES INC

August 30 2002

Mr Bernard P Orlan Director Environmental Health and Safety New York City Department of Education 28 11 Queens Plaza North Long Island City NY 11101

Re Air Sampling for Mercury Vapor Dr Sun Yat Sen School (I S 131M) ATC Project No 15 19125 0346

Dear Mr Orlan

ATC Associates Inc (ATC) is pleased to provide this report of the results of air sampling for mercury vapor conducted on August 22 2002 at the referenced school The New York City Department of Education (DOE) requested this sampling pnor to the resumption of classes to verify that acceptable indoor air quality is being maintained

Scope of Work

ATC collected three (3) samples for mercury vapor using Carulite® (Hydrar) tubes connected to batteiy powered sampling pumps calibrated to collect 0 2 liters of air per minute Samples were collected for ten (10) hours Two (2) samples were collected outdoors and one (1) was collected indoors The samples were sent to PSC Analytical Services Inc an American Industrial Hygiene Association accredited laboratory in Reading PA One blank tube was also submitted Analysis was performed by means of a mercury analyzer according to NIOSH Method 6009 A copy of the analytical laboratory report is attached

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

The sampling locations were the 1” floor Main Lobby 2 '* Floor Hallway by Room 210 and 3 Floor Hallway by Room 327

Results

Mercury was detected in these samples at levels that were indistinguishable from those detected in the blanks

The established regulatory value for mercury (0 Img/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 standard or guideline for mercury vapor in ambient air

CONFIDENTIAL, CITY_2IMCl00_003431116 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175454

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NYC-WTC_000175454Source: NYC Law Department, mirrored locally

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