Indoor air quality report, PS 89M, Feb 2002

NYC 9/11 Public Portal Document

Mr. Bernard P. Orlan February 6, 2002 Indoor Air Quality Assessment Page 4 P. S. 89M ATC Project No. 15-19125-0297 below the USEPA recommended concentration of 40 pg/m^ for sensitive individuals such as asthmatic people and children. The outdoor respirable particulate concentration averaged 23 pg/m^ (A.M.) and 10 pg/m^ (P.M.).

* The measurements made during this assessment were instantaneous readings, the NP.AAQS is a 24-hour average.

TVOC Concentration

TVOCs were not detected (0.0 ppm) anywhere inside or outside the building.

OBSERVATIONS

During this assessment, ATC noted the following:

• The interior of the building appeared clean and free of dust and debris; • The school was partially occupied (I.S. 89) at the time of the assessment; • No smoke odor was detected in the building.

FINDINGS

Based on the real-time measurements, the following findings are presented:

I. Respirable particulate, CO2, CO and TVOC concentrations were within applicable guidelines; 2. Eleven (11) measurements of temperature in the morning and four (4) measurements in the afternoon were below the recommended range; 3. All indoor measurements of relative humidity were below the ASHRAE recommended range of 30 to 60 percent for occupant comfort.

It is our pleasure to provide these indoor air quality services to the New York City Board of Education. If you have any questions about this report, please call (212) 353-8280, extension 261 or212. .

Sincerely, Reviewed by: A TC ASSOCIA TES INC.

Andreas C. Andreou James R. Cohn, CIH, CSP Senior Project Manager Regional Manager Industrial Hygiene Division

Attachment

CITY_21MC100_003109714

NYC-WTC_000185970