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NYC-WTC_000199335
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NYC 9/11 Public Portal Document
104 East 25th St., 10th Fl New York, New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES IIJC.
September 16, 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 Metals Benjamin Altman School (P.S. 42M) ATC Project No. 15-19125-0342
Dear Mr. Orlan: 1 ATC Associates Inc. (ATC) is pleased to provide this report of air sampling for metals in airborne dust conduc ed on September 4, 2002, in the referenced school building. The New York City Department of Education (DOE) requested this sampling prior to the resumption of classes to verify that acceptable indoor air quality is being maintained.
Scope of work
ATC collected three (3) samples for metals at specified locations. Samples were collected for approximatily 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. All samples were collected inside the building, fwo sample blanks were also submitted. 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. Each sample was analyzed for a panel of eleven (11) metals. The metals were aluminum (Al), cadmium (Cd), chromium (Cr), cobalt (Co), copper (Cu), iron (Fe), magnesium (Mg), manganese (Mn), molybdenum (Mo), nickel (Ni) and zinc (Zn). A copy of the analytical laboratory report is attached.
Wagdi Abdelshahid, Industrial Hygienists and Yiannis Efstathiou, Project Manger of ATC’s New York City office, collected the samples consistent with generally accepted industrial hygiene practices. As with all such sampling, there were inherent limitations created by constraints of time, operational and work practice variability, variations in air contaminant concentrations and sampling and analytical accuracy. The results of the sampling represent conditions found on the date the samples were collected.
The sampling locations were as follows: D' Floor Main Lobby, 2nd Floor Hallway by Room 207, and 3rd Floor Hallway by Room 309.
CITY_21MC100_003049193
NYC-WTC_000199335
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NYC-WTC_000199335Source: NYC Law Department, mirrored locally
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